CN208041118U - The speed changer of vehicle hydraulic pressure halting mechanism and with its vehicle - Google Patents

Abstract

The utility model is related to speed changer field, a kind of speed changer of vehicle hydraulic pressure halting mechanism is provided and with its vehicle.The speed changer of vehicle described in the utility model optimizes the structure of lock cell with hydraulic pressure halting mechanism, so that its reliability is stronger, can piston rod be relatively reliable maintained at parking position or non-parking position by lock cell, so that speed changer is maintained at parked state and non-parked state, and the lock cell is simple in structure, processing and installation difficulty is relatively low, but also cost reduction of the speed changer of the vehicle of the utility model with hydraulic pressure halting mechanism.

Description

Hydraulic parking mechanism for transmission of vehicle and vehicle having same

technical field

The utility model relates to the technical field of transmissions, in particular to a hydraulic parking mechanism for a transmission of a vehicle and a vehicle with the same.

Background technique

The transmission of the vehicle can be divided into manual transmission and automatic transmission according to the different gear shifting methods. Vehicles with automatic transmissions have become the mainstream direction of development and are more and more popular due to their simplicity in driving and ease of use. The parking mechanism is a safety device used in the automatic transmission to prevent the vehicle from sliding, so that the vehicle can park at a certain position or even on a slope reliably and without time limit.

At present, there are many kinds of automatic transmissions, and the structures of parking mechanisms are also different. Among them, the hydraulic parking mechanism is a main form of the parking mechanism. Generally speaking, people's requirements for the parking mechanism are safe, reliable and stable. In the common hydraulic parking mechanism at present, generally all be provided with the locking structure that is used to keep the parking mechanism in the parking position or the non-parking position, and the reliability of this locking structure directly affects the safety of the vehicle, the current The problem of the locking structure is that the reliability is insufficient or the structure is complicated, which makes the processing and installation difficult and the cost increases.

Utility model content

In view of this, the utility model aims to provide a hydraulic parking mechanism for a transmission of a vehicle with higher reliability and a simple structure and a vehicle having the same.

In order to achieve the above object, the technical solution of the utility model is achieved in that:

A hydraulic parking mechanism for a transmission of a vehicle, the hydraulic parking mechanism for a transmission comprising:

push rod assembly;

a hydraulic actuator assembly, the hydraulic actuator assembly is connected to the push rod assembly for driving the push rod assembly to move;

Parking arm assembly, the parking arm assembly can selectively engage with the parking gear sleeved on the output shaft of the transmission under the action of the push rod assembly when the push rod assembly moves Or separate, so as to realize the parking operation or release the parking operation accordingly;

Wherein, the hydraulic actuator assembly includes: a cylinder and a piston rod arranged in the inner cavity of the cylinder and capable of moving in the inner cavity, and a piston is arranged in the longitudinal middle of the piston rod to The inner cavity is divided into a spring chamber and a hydraulic chamber respectively located on both sides of the piston, a parking spring is sheathed on the part of the piston rod located in the spring chamber, and the hydraulic actuator assembly also includes a hydraulic oil delivery unit for selectively injecting hydraulic oil into the hydraulic chamber or discharging the hydraulic oil in the hydraulic chamber, the piston is driven by the spring force exerted by the parking spring and the hydraulic pressure from the hydraulic chamber Under the joint action of force, the piston rod can be moved along the inner cavity, the first end of the piston rod protrudes from the end of the spring chamber away from the piston, and the second end of the piston rod protruding from the end of the hydraulic chamber away from the piston, the second end is connected to the push rod assembly, so that the movement of the piston rod drives the movement of the push rod assembly, and at the first one end is provided with a locking unit for holding the piston rod in the parking position and the non-parking position,

Wherein, the cylinder body is formed with a locking member installation cavity at a position corresponding to the first end, the locking unit includes a locking member located in the locking member installation cavity, and the main body part of the locking member is formed as a cylinder Body-shaped and radially formed with a through hole, the first end of the piston rod passes through the through hole, the inner diameter of the through hole is larger than the outer diameter of the first end of the piston rod, the A locking groove extending radially along the piston rod is formed on the first end, and a projection that can be inserted into the locking groove is formed on the inner surface of the through hole correspondingly protruding radially inward, Locking springs and electronically controlled pushers are respectively provided on both sides of the locking member along the extending direction of the protrusion, the vehicle includes an electronic control unit, and the signal input end of the electronically controlled pusher is electrically connected to the The signal output end of the electronic control unit is on the side where the locking spring is provided, and the locking member installation cavity is closed so that the two ends of the locking spring are against the inner wall of the locking member installation cavity and the locking member respectively. On the side where the electric control pusher is provided, the locking piece installation cavity is opened so that the push rod of the electric control pusher can contact and push the locking piece, when the piston rod is in the non-stop position In the car position, the protrusion and the locking groove correspond to each other, and when the piston rod is in the parking position, the end surface of the first end of the piston rod and the end surface of the locking member facing the piston One end equals the other.

Further, the locking member also includes an anti-rotation groove formed by cutting off a portion of one end surface of the main body along the axial direction, and the locking unit also includes an anti-rotation groove inserted along the side wall of the anti-rotation groove. The anti-rotation pin in the anti-rotation groove, the locking member can move in a radial direction relative to the movement of the anti-rotation pin, and when the protrusion is located outside the piston rod, the anti-rotation pin contact with the side wall of the anti-rotation groove to prevent the locking part from rotating relative to the piston rod.

Further, another anti-rotation groove is formed on the outer surface of the piston rod by cutting a part along the axial direction of the piston rod, and the hydraulic actuator assembly also includes a groove along the radial direction of the piston rod. Another anti-rotation pin inserted into the other anti-rotation groove, the other anti-rotation pin and the other anti-rotation groove can move relative to each other along the axial direction of the piston rod, and the other anti-rotation pin The rotating pin is in contact with the groove wall of the other anti-rotation groove to prevent the piston rod from rotating around the axis.

Further, the part of the piston rod located in the spring cavity is formed with a large-diameter section with a larger outer diameter, and at the large-diameter section, the inner diameter of the parking spring is equal to the outer diameter of the piston rod. diameter, and the inner diameter of the parking spring is greater than the outer diameter of the piston rod at the portion of the piston rod located in the spring cavity other than the large diameter section, the large diameter section is close to The piston is set.

Further, the hydraulic oil delivery unit includes a solenoid valve, the solenoid valve includes a main pipeline and an oil inlet valve part and an oil outlet valve part arranged at both ends of the main pipeline, and the main pipeline is connected to the hydraulic chamber. Oil port, the oil inlet of the oil inlet valve part is connected to the lubricating oil chamber of the transmission through the first oil pipe, and the oil outlet of the oil outlet valve part is connected to the lubricating oil passage of the transmission through the second oil pipe , the signal input end of the electromagnetic valve is electrically connected to the signal output end of the electronic control unit.

Further, the hydraulic actuator assembly also includes a pressure sensor installed on the cylinder to detect the pressure of the hydraulic oil in the hydraulic chamber, and the signal output end of the pressure sensor is electrically connected to the electronic The signal input end of the control unit, and the signal output end of the electronic control unit is electrically connected to the signal input end of the solenoid valve.

Further, the hydraulic actuator assembly also includes a bracket connected to the second end of the piston rod, and a mounting through hole is formed on the bracket; the push rod assembly includes a push rod and one end connected to the push rod The other end of the push rod is installed in the installation through hole with a clearance fit, and the parking cam is used to contact the parking arm assembly.

Further, the push rod includes a first push rod section and a second push rod section extending perpendicular to each other, the one end is located on the first push rod section, and the other end is located on the second push rod section , the one end is provided with a first lug and a second lug spaced from each other in the axial direction and staggered, the first lug is farther away from the second push rod than the second lug section, the installation through hole includes a circular main through hole and a secondary through hole communicating with the circular main through hole, the secondary through hole can allow the first lug to pass through, and the circular main through hole The inner diameter of the through hole is slightly larger than the outer diameter of the first push rod section; a third lug and a fourth lug opposite to each other are formed on the second push rod section, and the push rod assembly also includes a compressed The parking spring is sleeved on the second push rod section in a state, and one end of the parking spring abuts against the third lug and the fourth lug, and the other end abuts against the parking cam.

Further, the parking arm assembly includes a parking arm and a positioning block that are opposite to each other and arranged at intervals, the parking arm is configured to be able to rotate around a rotation pin, and the side of the parking arm that is away from the positioning block One side faces the parking gear, the parking cam protrudes between the parking arm and the positioning block and is formed such that its outer diameter gradually decreases along the direction extending between the parking arm and the positioning block. Small, set so that when the parking cam is in the non-parking position, the parking arm is separated from the parking gear, and when the parking cam is inserted between the parking arm and the positioning block When the depth increases and reaches the parking position, the parking cam pushes the parking arm to rotate around the rotation pin to engage with the parking gear; the parking arm assembly also includes a A return spring is mounted on the rotation pin to apply a spring force to the parking arm to move toward the positioning block.

Further, the hydraulic actuator assembly also includes a gear sensor for detecting the real-time position of the piston rod, the signal output end of the gear sensor is electrically connected to the signal input end of the electronic control unit; the The gear sensor includes a detection sensing part installed on the transmission case and a to-be-detected part installed on the support, the detection sensing part and the to-be-detected part are arranged opposite to each other.

Another aspect of the utility model provides a vehicle, which is provided with the above-mentioned hydraulic parking mechanism for the transmission of the vehicle.

The hydraulic parking mechanism for the vehicle transmission of the utility model is relatively safe, and can be kept in the parking state and the non-parking state more reliably through the locking unit, and the locking unit is not only reliable in working performance, but also simple in structure and easy to process. And the difficulty of installation is relatively low, which also reduces the cost of the hydraulic parking mechanism for the vehicle transmission of the utility model.

Other features and advantages of the present utility model will be described in detail in the following specific embodiments.

Description of drawings

The accompanying drawings constituting a part of the utility model are used to provide a further understanding of the utility model, and the schematic implementation of the utility model and its description are used to explain the utility model, and do not constitute an improper limitation of the utility model. In the attached picture:

Fig. 1 is a three-dimensional structural schematic diagram of a hydraulic parking mechanism for a transmission according to an embodiment of the present invention, wherein part of the housing of the cylinder body is removed to show the piston rod and the locking member in the cylinder body;

Fig. 2 is a cross-sectional view of the hydraulic actuator part in the hydraulic parking mechanism for the transmission of Fig. 1;

Fig. 3 is a schematic diagram of the connection between the first oil pipe and the solenoid valve in the hydraulic parking mechanism for the transmission of Fig. 1;

Fig. 4 is a schematic diagram of the push rod assembly in the hydraulic parking mechanism for the transmission of Fig. 1;

Fig. 5 is a schematic diagram of installation through holes on the bracket in the hydraulic parking mechanism for the transmission of Fig. 1;

Fig. 6 is a schematic diagram of the junction of the push rod assembly and the parking arm assembly in the hydraulic parking mechanism for the transmission in Fig. 1;

Fig. 7 is a schematic diagram of the connection between the piston rod and the bracket in the hydraulic parking mechanism for the transmission in Fig. 1 .

Explanation of reference signs:

1 cylinder block 2 parking gear

3 gear position sensor 31 detection sensing part

4Pressure sensor 5Electrically controlled pusher

6 Parking spring 7 Solenoid valve

8 The first oil pipe 9 Locking piece

91 bump 92 anti-rotation groove

10 piston rod 101 locking groove

102 another anti-rotation slot 103 large diameter section

11 Blocking cover 12 Push rod assembly

121 Parking cam 122 Parking spring

123 putter 1231 first putter section

1232 second push rod section 1234 first lug

1235 Second lug 1236 Third lug

1237 The fourth lug 13 positioning block

14 parking arm 15 swivel pin

16 return spring 17 piston

18 spring chamber 19 hydraulic chamber

20 locking spring 21 anti-rotation pin

22 brackets

Detailed ways

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "central", "circumferential", "direction", "axial", "radial", "deviation" etc. are based on the drawings. The orientation or positional relationship shown also corresponds to the actual orientation or positional relationship; the used orientation words such as "up, down, left, and right" usually refer to the up, down, left, and right shown in the attached drawings; "Inner and outer" refers to the inner and outer relative to the outline of each part itself; it is only for the convenience of describing the utility model and simplifying the description, and does not indicate that the device or element referred to must have a specific orientation, and must have a specific orientation. construction and operation, therefore, should not be construed as limiting the utility model.

The utility model will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

The first aspect of the utility model provides a hydraulic parking mechanism for a transmission of a vehicle. The hydraulic parking mechanism for a transmission includes:

Push rod assembly 12;

a hydraulic actuator assembly, the hydraulic actuator assembly is connected to the push rod assembly 12 for driving the push rod assembly 12 to move;

Parking arm assembly, the parking arm assembly can be selectively connected with the parking arm sleeved on the output shaft of the transmission under the action of the push rod assembly 12 when the push rod assembly 12 is moving. The gear 2 is engaged or disengaged, so as to realize the parking operation or release the parking operation accordingly;

Wherein, the hydraulic actuator assembly includes: a cylinder 1 and a piston rod 10 arranged in the inner cavity of the cylinder 1 and capable of moving in the inner cavity, the longitudinal middle of the piston rod 10 is provided with Piston 17, to separate the inner cavity into a spring chamber 18 and a hydraulic chamber 19 respectively located on both sides of the piston 17, the part of the piston rod 10 located in the spring chamber 18 is sleeved with a parking Spring 6, the hydraulic actuator assembly also includes a hydraulic oil delivery unit for selectively injecting hydraulic oil into the hydraulic chamber 19 or discharging the hydraulic oil in the hydraulic chamber 19, the piston 17 Under the combined action of the spring force applied by the parking spring 6 and the hydraulic pressure from the hydraulic chamber 19, the piston rod 10 can be moved along the inner cavity, and the first end of the piston rod 10 can move from the spring chamber 18 protrudes from one end away from the piston 17, the second end of the piston rod 10 protrudes from the end of the hydraulic chamber 19 away from the piston 17, and the second end is connected to the push rod assembly 12, so that the movement of the piston rod 10 drives the movement of the push rod assembly 12, and there is provided at the first end for holding the piston rod 10 in the parking position and the non-parking position. lock unit,

Wherein, the cylinder body 1 is formed with a locking member installation cavity at a position corresponding to the first end, and the locking unit includes a locking member 9 located in the locking member installation cavity, and the main body part of the locking member 9 Formed in a cylindrical shape and radially formed with a through hole through which the first end of the piston rod 10 passes, the inner diameter of the through hole is larger than that of the first end of the piston rod 10 Outer diameter, the first end is formed with a locking groove 101 extending radially along the piston rod 10, and the inner surface of the through hole is correspondingly protruded radially inwardly and is formed to be inserted into the said through hole. The protrusion 91 in the locking groove 101, the locking spring 20 and the electric control pusher 5 are respectively arranged on both sides of the locking member 9 along the extending direction of the protrusion 91, the vehicle includes an electronic control unit, the The signal input end of the electronically controlled pusher 5 is electrically connected to the signal output end of the electronic control unit. On the side where the locking spring 20 is provided, the locking piece installation cavity is closed so that the two sides of the locking spring 20 are closed. end against the inner wall of the locking member installation cavity and the locking member 9 respectively, and on the side where the electric control pusher 5 is arranged, the lock member installation cavity is opened so that the electric control pusher 5 The push rod can contact and push the locking member 9, when the piston rod 10 is in the non-parking position, the protrusion 91 and the locking groove 101 correspond to each other, and when the piston rod 10 is in the parking position , the end surface of the first end of the piston rod 10 abuts against the end of the locking member 9 facing the piston 17 .

For the hydraulic parking mechanism for the transmission of the vehicle in this embodiment, its working principle is roughly as follows: when the parking operation is required, the driver engages the parking gear, and the electronic control unit of the vehicle receives the parking signal and converts the signal Transmission to the electronically controlled pusher 5, the electronically controlled pusher 5 works to apply a driving force, so that the locking piece 9 moves in the locking piece installation cavity, and the projection 91 breaks away from the locking groove 101 (in the embodiment of Fig. 2, the electronically controlled pusher After the device 5 receives the parking signal, the push rod is pushed out, and moves against the locking member 9 to the left in FIG. It can move along the inner cavity. At this time, the hydraulic actuator assembly does not inject hydraulic oil into the hydraulic cavity 19 but enables the hydraulic oil in the hydraulic cavity 19 to be discharged. The piston rod 10 moves to the In its parking position, the second end of the piston rod 10 then pushes the push rod assembly 12 to move so that the push rod assembly also reaches its parking position. The gear 2 is engaged to realize the parking operation. At this time, the electronic control unit controls the electronically controlled pusher 5 to not continue to apply the driving force, and the locking member 9 moves in the opposite direction under the action of the locking spring 20 to the direction of the locking member 9 towards the piston 17. The end face bears against the end face of the first end of the piston rod 10, thereby preventing the piston rod 10 from returning, keeping the piston rod 10 in its park position, and then keeping the push rod assembly 12 in its park position and being sleeved in the The parking gear 2 on the output shaft of the transmission is always engaged to maintain the parking state; when it is necessary to release the parking, the driver engages the release parking gear, and the electronic control unit of the vehicle receives the signal of releasing the parking and transmits the signal to The electric control pusher 5, the electric control pusher 5 works and applies a driving force, so that the locking member 9 moves in the locking member installation cavity, so that the locking unit loses the locking ability to the piston rod 10 (in the embodiment of Fig. 2, the electric control pushes After the device 5 receives the parking release signal, the push rod is pushed out, and moves against the locking member 9 to the left in Fig. 2 until the locking unit loses the ability to lock the piston rod 10), the piston rod 10 can move along the inner cavity, at this time , the hydraulic actuator assembly injects hydraulic oil into the hydraulic chamber 19, so that the pressure of the hydraulic oil in the hydraulic chamber 19 reaches a certain level, so that the hydraulic thrust of the hydraulic chamber received by the piston rod 10 is greater than the spring thrust of the parking spring 6 in the compressed state , the piston rod 10 moves (upward in FIG. 2 ) and returns to its non-parking position. At this time, the projection 91 and the locking groove 101 are opposite to each other, and the second end of the piston rod 10 then pulls the push rod assembly 12 to move And the push rod assembly 12 is also returned to its non-parking position, and the push rod assembly 12 is separated from the parking gear 2 sleeved on the output shaft of the transmission to realize the parking operation. At this time, the electronic control unit again Control the electronically controlled pusher 5 not to continue to apply the pushing force, and the locking piece 9 moves in the opposite direction under the action of the locking spring 20 until the protrusion 91 of the locking piece 9 is inserted into the locking groove 101, thereby keeping the piston rod 10 in its non-stop position. car position, and then make the push rod total 12 remains in its non-parking position and separates with the parking gear 2 that is sleeved on the output shaft of the speed changer all the time and keeps the non-parking state.

From the above description of the working principle, it can be seen that the hydraulic parking mechanism for the transmission of the vehicle of the present invention is relatively safe, and can be kept in the parking state and the non-parking state more reliably through the locking unit, and, Among them, the locking unit not only has reliable working performance, but also has a simple structure and low difficulty in processing and installation, which also reduces the cost of the hydraulic parking mechanism for the vehicle transmission of the present invention.

Preferably, the locking member 9 further includes an anti-rotation groove 92 formed by cutting off a part of the axial end surface of the main body portion, and the locking unit also includes a side of the anti-rotation groove 92 The anti-rotation pin 21 whose wall is inserted into the anti-rotation groove 92, the locking member 9 can move in the radial direction relative to the anti-rotation pin 21, and when the protrusion 91 is positioned on the piston rod 10 When outside, the anti-rotation pin 21 is in contact with the side wall of the anti-rotation groove 92 to prevent the locking member 9 from rotating relative to the piston rod 10, so as to further improve the working reliability of the locking unit.

Similarly, preferably, another anti-rotation groove 102 is formed by cutting a part along the axial direction of the piston rod 10 on the outer surface of the piston rod 10, and the hydraulic actuator assembly also includes The radial direction of the piston rod 10 is inserted into another anti-rotation pin 21 in the other anti-rotation groove 102 , and the other anti-rotation pin 21 and the other anti-rotation groove 102 can move along the piston rod 10 The axial relative movement, and the other anti-rotation pin 21 is in contact with the groove wall of the other anti-rotation groove 102, so as to prevent the piston rod 10 from rotating around the axis, so as to further improve the working reliability of the locking unit .

Those skilled in the art can understand that the hydraulic parking mechanism for the transmission of the vehicle of the present invention can also include other forms of structures for preventing the relative rotation of the piston rod 10 and the locking member 9. The purpose is to prevent the locking unit from failing due to the rotation of the piston rod 10 and the locking member 9, to provide the reliability of the locking unit, and to ensure the safety of the vehicle; and for the anti-rotation structure and components shown in the above-mentioned illustrated embodiments, there are The advantages of simple structure, easy processing and installation.

And, for the electronically controlled pusher 5 in the present embodiment, it is specifically an electromagnet pusher, when the electromagnet pusher is energized, the electromagnet has magnetism, and the push rod of the electromagnet pusher is under the action of magnetic force. Push out and push against the locking piece 9 to apply a thrust to the locking piece 9, and when the electromagnet pusher is powered off, the electromagnet will not have magnetism, and then the pushing force of the push rod on the locking piece 9 disappears. Of course, it can be understood that, Any suitable other types of electronically controlled pushers 5 can also be selected. Moreover, in order to prevent the excessive elastic force of the locking spring 20 from affecting the installation reliability of the electric control pusher 5, the electric control pusher 5 is pressed on the outside of the electric control pusher 5 and the outer edge is installed on the The pressing plate on the cylinder body 1 is installed on the cylinder body 1 to improve the installation firmness of the electric control pusher 5 .

The cylinder body 1 may also include a plug 11 for sealing the hydraulic chamber 19, and the cylinder body 1 may be installed on the transmission housing.

Referring to FIG. 2 , preferably, in this embodiment, the part of the piston rod 10 located in the spring cavity 18 is formed with a large-diameter section 103 with a relatively large outer diameter, and at the large-diameter section 103, the The inner diameter of the parking spring 6 is equal to the outer diameter of the piston rod 10, and the part of the piston rod 10 located in the spring cavity 18 is at a position other than the large diameter section 103, the parking The inner diameter of the spring 6 is larger than the outer diameter of the piston rod 10, and the large-diameter section 103 is arranged close to the piston 17. In this case, the large-diameter section 103 can be used as a stopper for the parking spring 6. and the guide part to prevent the parking spring 6 from being deflected and deformed, and in parts other than the large-diameter section 103, the parking spring 6 can be freely expanded and contracted without affecting the normal operation of the parking spring 6. This implementation In this manner, the lower end of the parking spring 6 is sheathed on the large-diameter section 103 , and the upper end is against the upper wall of the spring cavity 18 .

And, specifically, referring to FIG. 1 and FIG. 2, the hydraulic oil delivery unit includes a solenoid valve 7, and the solenoid valve 7 includes a main pipeline and an oil inlet valve part 71 and an oil outlet valve part arranged at both ends of the main pipeline. 72, the main pipeline is connected to the oil port of the hydraulic chamber 19, the oil inlet port of the oil inlet valve part 71 is connected to the lubricating oil chamber of the transmission through the first oil pipe 8, and the oil outlet valve part 72 The oil outlet of the solenoid valve 7 is connected to the lubricating oil passage of the transmission through the second oil pipe, and the signal input end of the solenoid valve 7 is electrically connected to the signal output end of the electronic control unit. By arranging the first oil pipe 8 and the second oil pipe, it is beneficial to arrange the hydraulic parking mechanism more flexibly in the transmission; and, in this embodiment, the hydraulic oil in the hydraulic chamber 19 enters and discharges through the oil port of the hydraulic chamber 19, When the electronic control unit receives the parking signal, the electronic control unit sends an electric signal to the solenoid valve 7, the oil inlet port of the oil inlet valve part 71 is closed and the oil outlet port of the oil outlet valve part 72 is opened, and the hydraulic pressure in the hydraulic chamber 19 The oil is discharged through the oil outlet of the oil outlet valve part 72. When the electronic control unit receives the contact parking signal, the electronic control unit sends an electric signal to the solenoid valve 7, and the oil inlet of the oil inlet valve part 71 is opened and the oil outlet valve The oil outlet of the part 72 is closed, and the external hydraulic oil enters the hydraulic chamber 19 through the oil inlet of the oil inlet valve part 71 . Moreover, the solenoid valve 7 is installed on the cylinder body 1 through a pressure plate that is pressed on the outside of the solenoid valve 7 and the outer edge is installed on the cylinder body 1 by bolts, so as to improve the installation firmness of the solenoid valve 7 .

Preferably, the hydraulic actuator assembly further includes a pressure sensor 4 installed on the cylinder body 1 for detecting the pressure of the hydraulic oil in the hydraulic chamber 19, and the signal output end of the pressure sensor 4 is electrically connected to At the signal input end of the electronic control unit, in this way, the pressure of the hydraulic oil in the hydraulic chamber 19 is detected in real time by the pressure sensor 4, and the detected pressure signal is transmitted to the electronic control unit, and then sent to the solenoid valve by the electronic control unit. 7 to send a signal to control the opening of the electromagnetic valve 7 accordingly, and then control the rate of hydraulic oil entering the hydraulic chamber 19 to prevent the pressure of the hydraulic oil in the hydraulic chamber 19 from instantaneously increasing to exceed the specified value, which may cause the piston rod 10 to rapidly Moving upwards, in turn causes damage to the piston rod 10 and the associated parking spring 6, locking unit, etc.

And, referring to FIG. 1 , preferably, the hydraulic actuator assembly further includes a bracket 22 connected to the second end of the piston rod 10 (the bracket 22 and the piston rod 10 may be connected by rivets), and the bracket 22 is formed There is an installation through hole; the push rod assembly 12 includes a push rod 123 and a parking cam 121 connected to one end of the push rod 123, and the other end of the push rod 123 is installed in the installation through hole with clearance fit , the parking cam 121 is used to contact the parking arm assembly. In this case, when the parking cam 121 is impacted due to contact with the parking arm assembly, the clearance between the one end of the push rod 123 and the bracket 22 can be absorbed or at least reduced. The aforementioned impact can be reduced or prevented from being affected by the piston rod 10 and other components of the hydraulic actuator assembly related to it.

Further specifically, referring to FIG. 1 and in conjunction with FIG. 4 , the push rod 123 includes a first push rod segment 1231 and a second push rod segment 1232 extending perpendicularly to each other, and the one end is located on the first push rod segment 1231 , the other end is located on the second push rod section 1232, the first lug 1234 and the second lug 1235 are arranged on the one end and are spaced from each other in the axial direction and staggered, the first lug 1234 is farther away from the second push rod section 1232 than the second lug 1235, and the installation through hole includes a circular main through hole and a secondary through hole communicating with the circular main through hole, the The auxiliary through hole can allow the first lug 1234 to pass through, and the inner diameter of the circular main through hole is slightly larger than the outer diameter of the first push rod section 1231, so that when installing, first make the one end and The first lug 1234 on it passes through the installation through hole, and because the second lug 1235 is obstructed by the bracket 22, the push rod 123 cannot continue to move. At this time, the first push rod section 1231 is rotated to make the second If one lug 1234 is staggered with the auxiliary through hole, since the first lug 1234 is obstructed by the bracket 22, the push rod 123 can no longer be retracted, thereby realizing the connection between the push rod 123 and the bracket 22. After installation, The part between the first lug 1234 and the second lug 1235 of the bracket 22 and the first push rod section 1231 is in contact with the bracket 22 and installed in the circular main through hole, and because the circular main through hole The inner diameter of the hole is slightly larger than the outer diameter of the first push rod section 1231 , so that clearance fit between the bracket 22 and the first push rod section 1231 is realized.

Moreover, a third lug 1236 and a fourth lug 1237 opposite to each other are formed on the second push rod section 1232 , and the push rod assembly 12 also includes a sleeve sleeved on the second push rod in a compressed state. For the parking spring 122 on the section 1232 , one end of the parking spring 122 abuts against the third lug 1236 and the fourth lug 1237 , and the other end abuts against the parking cam 121 . Referring to Fig. 1, when the piston rod 10 moves from the non-driving position to the driving position, the second end of the piston rod 10 drives the bracket 22 to move downward, and then the first push rod section 1231 also moves downward and pushes the parking cam 121 to the and when the piston rod 10 returns to the non-driving position from the driving position, the second end of the piston rod 10 drives the support 22 to move upward, and under the pull of the support 22, the first push rod section 1231 also moves upward and drives the parking position. The car cam 121 moves upward. The inventors of the present utility model have found that the impact on the parking cam 121 from the parking arm assembly usually includes two sub-impacts towards the parking cam 121 in the radial direction and axial direction, and the parking spring 122 buffers the impact along the The axial sub-shock and the buffering of the radial sub-shock through the clearance fit between the second push rod section 1232 and the bracket 22 can greatly reduce and absorb the impact, and then finally transmit it to the piston rod 10 and its associated structures. Radial impact is small or even negligible.

Further specifically, the parking arm assembly includes a parking arm 14 and a positioning block 13 that are opposite to each other and arranged at intervals. The parking arm 14 is configured to be able to rotate around a rotation pin 15. The side away from the positioning block 13 faces the parking gear 2, and the parking cam 121 extends between the parking arm 14 and the positioning block 13 and is formed to extend into the parking arm along the 14 and the positioning block 13 gradually reduce the outer diameter of the direction, so that when the parking cam 121 is in the non-parking position, the parking arm 14 is separated from the parking gear 2, and when the When the parking cam 121 extends into the depth between the parking arm 14 and the positioning block 13 and reaches the parking position, the parking cam 121 pushes the parking arm 14 around the rotation pin 15 Rotate to engage with the parking gear 2; the parking arm assembly also includes a spring force that is sleeved on the rotating pin shaft 15 to apply a spring force moving toward the positioning block 13 to the parking arm 14 Return spring 16. 1 and 6, in this embodiment, the parking cam 121 is always inserted between the parking arm 14 and the positioning block 13, thus the setting of an additional guiding structure can be omitted, making the structure simpler and more reliable, but As the parking cam 121 reaches its parking position from the non-parking position, the parking cam 121 will move downwards, so that the insertion depth of the parking cam 121 between the parking arm 14 and the positioning block 13 will increase, And because of the special profile of the parking cam 121, along with the depth of its insertion between the parking arm 14 and the positioning block 13 increases, it will push the parking arm 14 away from the positioning block 13, that is, it will push the parking arm 14 away from the positioning block 13. The arm 14 moves towards the park gear 2 and is arranged so that when the park cam 121 is in its non-park position, the park arm 14 is not in contact with the park gear 2 and the output shaft of the clutch is operating normally, and when the park cam 121 reaches During its parking position, the parking arm 14 is in contact with the parking gear 2, so that the parking gear 2 combined with the output shaft of the clutch stops running, thereby realizing the parking operation; when it is necessary to release the parking, the parking cam 121 Moving upward, the parking arm 14 moves toward the positioning block 13 under the push of the return spring 16 .

Wherein, the parking gear 2 can be press-fitted on the output shaft of the transmission through a spline and rotate together with the output shaft of the transmission.

Wherein, the positioning block 13 can be installed on the transmission housing by means of interference press-fitting, and its shape can be roughly half a cylinder, and the position of the parking arm 14 facing the positioning block 13 can have a matching shape, Thereby, the parking cam 121 can be blocked; and the parking cam 121 has three segments from top to bottom, the first segment and the second segment have a tapered section whose outer diameter gradually decreases from top to bottom, And smooth transitions between segments.

In addition, preferably, the hydraulic actuator assembly further includes a gear sensor 3 for detecting the real-time position of the piston rod 10, and the signal output end of the gear sensor 3 is electrically connected to the signal of the electronic control unit. Input end; the gear sensor 3 includes a detection sensor part 31 installed on the housing of the transmission and a part to be detected installed on the bracket 22, the detection sensor part 31 and the part to be detected The parts are arranged opposite to each other. The gear sensor 3 is used to detect the real-time position of the piston rod 10. When it is detected that the piston rod 10 reaches its parking position or its non-parking position, the detection signal is transmitted to the electronic control unit, and the electronic control unit Then transmit instructions to the electric control pusher 5 and the solenoid valve 7, and control the work of the electric control pusher 5, so that the locking unit locks the piston rod 10 in its parking position or non-parking position, and controls the solenoid valve 7 to respond accordingly, To control the output and discharge of hydraulic oil in the hydraulic chamber 19. And, referring to Fig. 1 and Fig. 7, in the present embodiment, the portion to be detected includes a sensing magnet installed on the bracket 22, while the detection sensor 31 is installed on the transmission casing, the detection sensor 31 is relatively stationary, and the detection sensor 31 is relatively stationary, and The detection part moves with the bracket 22 and then with the piston rod 10 , and then generates relative motion with the sensing magnet, and judges the real-time position of the piston rod 10 through the change of the magnetic field of the sensing magnet detected by the detection sensor 31 .

Wherein the hydraulic parking mechanism of the present utility model is owing to being applicable in the automatic transmission.

According to the second aspect of the utility model, there is also provided a vehicle, the vehicle is provided with the hydraulic parking mechanism for the transmission of the vehicle according to the utility model.

The preferred implementation of the present utility model has been described in detail above in conjunction with the accompanying drawings, however, the present utility model is not limited thereto. Within the scope of the technical concept of the utility model, various simple modifications can be made to the technical solution of the utility model. Combining the specific technical features in any suitable way is included. In order to avoid unnecessary repetition, the utility model will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the content disclosed by the utility model, and all belong to the protection scope of the utility model.

Claims (11)

1. A hydraulic parking mechanism for a transmission of a vehicle, the hydraulic parking mechanism for the transmission comprising: Push rod assembly (12); a hydraulic actuator assembly, the hydraulic actuator assembly is connected to the push rod assembly (12) for driving the push rod assembly (12) to move; Parking arm assembly, the parking arm assembly can be selectively sleeved on the output shaft of the transmission under the action of the push rod assembly (12) when the push rod assembly (12) moves Engage or disengage the parking gear (2) on the top, so as to realize the parking operation or release the parking operation accordingly; Wherein, the hydraulic actuator assembly includes a cylinder (1) and a piston rod (10) arranged in the inner cavity of the cylinder (1) and capable of moving in the inner cavity, the piston rod ( 10) is provided with a piston (17) in the longitudinal middle, so that the inner cavity is divided into a spring chamber (18) and a hydraulic chamber (19) respectively located on both sides of the piston (17), and the piston rod (10 ) in the spring chamber (18) is covered with a parking spring (6), and the hydraulic actuator assembly also includes a function for selectively injecting hydraulic oil into the hydraulic chamber (19) or The hydraulic oil delivery unit that discharges the hydraulic oil in the hydraulic chamber (19), the combination of the spring force exerted by the parking spring (6) of the piston (17) and the hydraulic pressure from the hydraulic chamber (19) Under the action, the piston rod (10) can be moved along the inner cavity, and the first end of the piston rod (10) protrudes from the end of the spring chamber (18) away from the piston (17) , the second end of the piston rod (10) protrudes from the end of the hydraulic chamber (19) away from the piston (17), the second end is connected to the push rod assembly (12), Thereby the movement of the piston rod (10) drives the movement of the push rod assembly (12), and a device is provided at the first end for keeping the piston rod (10) in the parking position and the non-park locking unit in position, It is characterized in that, the cylinder body (1) is formed with a locking member installation cavity at a position corresponding to the first end, and the locking unit includes a locking member (9) located in the locking member installation cavity, the The main body part of the lock piece (9) is formed into a cylindrical shape and a through hole is formed in the radial direction, the first end of the piston rod (10) passes through the through hole, and the inner diameter of the through hole is larger than that of the through hole. The outer diameter of the first end of the piston rod (10), the locking groove (101) extending radially along the piston rod (10) is formed on the first end, and the inner surface of the through hole Correspondingly protruding inward in the radial direction is formed with a projection (91) that can be inserted into the locking groove (101), and the two sides of the locking piece (9) along the extending direction of the projection (91) A locking spring (20) and an electronically controlled pusher (5) are respectively arranged on the side, the vehicle includes an electronic control unit, and the signal input end of the electronically controlled pusher (5) is electrically connected to the signal output of the electronic control unit On the side where the lock spring (20) is provided, the lock installation chamber is closed so that the two ends of the lock spring (20) are respectively against the inner wall of the lock installation chamber and the lock part (9), on the side where the electric control pusher (5) is arranged, the installation cavity of the locking part is opened so that the push rod of the electric control pusher (5) can contact and push the locking part (9), when the piston rod (10) is in the non-parking position, the protrusion (91) and the locking groove (101) correspond to each other; when the piston rod (10) is in the parking position , the end surface of the first end of the piston rod (10) abuts against the end of the locking member (9) facing the piston (17). 2. The hydraulic parking mechanism for a vehicle transmission according to claim 1, characterized in that the locking member (9) also includes a part formed by cutting off a part of the axial end surface of the main body part. Anti-rotation slot (92), the locking unit also includes an anti-rotation pin (21) inserted into the anti-rotation slot (92) along the side wall of the anti-rotation slot (92), the locking member ( 9) It can move in the radial direction relative to the movement of the anti-rotation pin (21), and when the protrusion (91) is located outside the piston rod (10), the anti-rotation pin (21) and Side walls of the anti-rotation groove (92) are in contact to prevent the locking member (9) from rotating relative to the piston rod (10). 3. The hydraulic parking mechanism for the transmission of a vehicle according to claim 1, characterized in that, the outer surface of the piston rod (10) is formed with a part cut away along the axial direction of the piston rod (10) to Another anti-rotation groove (102) is formed, and the hydraulic actuator assembly also includes another anti-rotation pin inserted into the other anti-rotation groove (102) along the radial direction of the piston rod (10) (21), the other anti-rotation pin (21) and the other anti-rotation groove (102) can move relative to the axial direction of the piston rod (10), and the other anti-rotation pin (21 ) is in contact with the groove wall of the other anti-rotation groove (102) to prevent the piston rod (10) from rotating around the axis. 4. The hydraulic parking mechanism for a transmission of a vehicle according to claim 1, characterized in that, the part of the piston rod (10) located in the spring chamber (18) is formed with a large Diameter section (103), at the large diameter section (103), the inner diameter of the parking spring (6) is equal to the outer diameter of the piston rod (10), and at the position of the piston rod (10) The part in the spring chamber (18) is in a position other than the large diameter section (103), the inner diameter of the parking spring (6) is larger than the outer diameter of the piston rod (10), and the large diameter A section (103) is arranged close to said piston (17). 5. The hydraulic parking mechanism for the transmission of a vehicle according to claim 1, wherein the hydraulic oil delivery unit includes a solenoid valve (7), and the solenoid valve (7) includes a main pipeline and is arranged on the The oil inlet valve part (71) and the oil outlet valve part (72) at both ends of the main pipeline, the main pipeline is connected to the oil port of the hydraulic chamber (19), and the oil inlet valve part (71) The first oil pipe (8) is connected to the lubricating oil chamber of the transmission, the oil outlet of the oil outlet valve part (72) is connected to the lubricating oil passage of the transmission through the second oil pipe, and the solenoid valve (7 ) The signal input terminal is electrically connected to the signal output terminal of the electronic control unit. 6. The hydraulic parking mechanism for a transmission of a vehicle according to claim 5, characterized in that, the hydraulic actuator assembly also includes a motor mounted on the cylinder (1) for detecting the hydraulic chamber (19). ), the pressure sensor (4) of the pressure of the hydraulic oil in the pressure sensor (4), the signal output end of the pressure sensor (4) is electrically connected to the signal input end of the electronic control unit, and the signal output end of the electronic control unit is electrically connected to at the signal input end of the solenoid valve (7). 7. The hydraulic parking mechanism for a transmission of a vehicle according to claim 1, characterized in that, the hydraulic actuator assembly further comprises a bracket (22) connected to the second end of the piston rod (10), the Mounting through holes are formed on the bracket (22); the push rod assembly (12) includes a push rod (123) and a parking cam (121) connected to one end of the push rod (123), and the push rod ( The other end of 123) is installed in the installation through hole with loose fit, and the parking cam (121) is used to contact with the parking arm assembly. 8. The hydraulic parking mechanism for a transmission of a vehicle according to claim 7, characterized in that, the push rod (123) comprises a first push rod segment (1231) and a second push rod segment (1232) extending perpendicularly to each other ), the one end is located on the first push rod section (1231), the other end is located on the second push rod section (1232), and the one end is provided with axially spaced and staggered The first lug (1234) and the second lug (1235), the first lug (1234) is farther from the second push rod section (1232) than the second lug (1235) , the installation through hole includes a circular main through hole and a secondary through hole communicating with the circular main through hole, the secondary through hole can allow the first lug (1234) to pass through, and the circular The inner diameter of the shaped main through hole is slightly larger than the outer diameter of the first push rod section (1231); a third lug (1236) and a fourth lug opposite to each other are formed on the second push rod section (1232) (1237), the push rod assembly (12) further includes a parking spring (122) sleeved on the second push rod section (1232) in a compressed state, and the parking spring (122) One end abuts against the third lug (1236) and the fourth lug (1237), and the other end abuts against the parking cam (121). 9. The hydraulic parking mechanism for the transmission of a vehicle according to claim 7, characterized in that, the parking arm assembly comprises a parking arm (14) and a positioning block (13) that are opposite to each other and arranged at intervals, so that The parking arm (14) is set to be able to rotate around the rotation pin (15), and the side of the parking arm (14) facing away from the positioning block (13) faces the parking gear (2), so The parking cam (121) protrudes between the parking arm (14) and the positioning block (13) and is formed along the The outer diameter of the direction decreases gradually, and it is set so that when the parking cam (121) is in the non-parking position, the parking arm (14) is separated from the parking gear (2), and when the parking When the cam (121) extends into the depth between the parking arm (14) and the positioning block (13) and reaches the parking position, the parking cam (121) pushes the parking arm (14 ) rotates around the rotation pin (15) to engage with the parking gear (2); the parking arm assembly also includes a The arm (14) exerts a return spring of spring force moving towards said positioning block (13). 10. The hydraulic parking mechanism for a transmission of a vehicle according to claim 7, characterized in that the hydraulic actuator assembly further includes a gear sensor (3) for detecting the real-time position of the piston rod (10) , the signal output end of the gear sensor (3) is electrically connected to the signal input end of the electronic control unit; the gear sensor (3) includes a detection sensing part ( 31) and the part to be detected installed on the bracket (22), the detection sensing part (31) and the part to be detected are arranged opposite to each other. 11. A vehicle, characterized in that it is provided with the hydraulic parking mechanism for the transmission of the vehicle according to any one of claims 1-10.