CN105090282A - Following-type overrunning clutch with parallel rolls - Google Patents

Abstract

The invention discloses a follow-up type parallel roller overrunning clutch, which comprises an outer ring, an inner ring and a rolling body, and also includes a supporting roller assembly, and the supporting roller group of the supporting roller assembly includes at least the rollers arranged in parallel in the radial direction of the overrunning clutch. The outer support roller and the inner support roller, the outer circle of the outer support roller and the outer circle of the inner support roller are all in contact with the outer circle of the adjacent rolling body, and the outer support roller and the inner support roller are arranged in a movable manner in the circumferential direction of the overrunning clutch. The invention simplifies the processing and installation process, improves work efficiency, reduces processing costs, and ensures processing and assembly accuracy; more rolling elements can be installed to ensure the stability, stability and load-bearing capacity of the transmission; moreover, the rolling elements have radial Appropriate constraints can avoid large wear in the overrunning structure, and ensure the service life, running accuracy and safety of use.

Description

Follow-up parallel roller overrunning clutch

technical field

The invention relates to a clutch device for motor vehicles and mechanical transmission, in particular to an overrunning clutch.

Background technique

The overrunning clutch is a basic component that appears with the development of power products. It is an important component used for power transmission and separation between the prime mover and the working machine or between the driving shaft and the driven shaft inside the machine. It is mainly a device with a self-clutching function by utilizing the speed change of the main and driven parts or the transformation of the rotation direction. In practice, most of them are clutches that use the meshing of teeth, the meshing of ratchet-pawl, or the wedging action of rolling elements and wedges to transmit motion or torque in one direction.

Existing overrunning clutches generally include an inner ring, rolling elements and an outer ring. The structure adopts the structure of the outer ring on the inner ring, and the meshing cavity is formed between the two, and the rolling body is located in the meshing cavity to form an overrunning clutch structure; whether the rolling body adopts a ball type or a roller type structure, in the overrunning clutch If the limit seat and the elastic element are arranged on the inner ring or the outer ring of the outer ring, a large space in the circumferential direction needs to be occupied, so that the number of rollers (balls) cannot be set more. Therefore, the existing overrunning clutches are not stable enough to run smoothly and have poor load capacity; for applications that require heavy loads, the only option is to increase their radial dimensions, resulting in larger transmission equipment that cannot meet the needs of modern mechanical equipment. Another is that the elastic element acts on the rolling body and restricts its reverse engagement in the circumferential direction. It acts on a point or part of the rolling body, which cannot achieve balance, making the rolling body easily deflected, resulting in jamming or poor movement. , resulting in mechanical failure. At the same time, because the existing overrunning clutch needs to process the limit seat and install the elastic element, the processing efficiency of the overrunning clutch is low, the installation is complicated, and the cost is increased.

In order to solve the above problems, there is an auxiliary roller structure that is independent of the outer ring and the inner ring, which is used to maintain the distance between the rolling elements, cancel the elastic element and the limit seat of the prior art, and avoid the outer ring or inner ring. The limit seat is directly processed on the top, which simplifies the processing process, improves work efficiency, reduces processing costs, ensures processing and assembly accuracy, prolongs the service life and ensures the transmission effect, and the related parts are easy to replace after damage, reducing maintenance and use costs; at the same time, increasing However, the auxiliary roller generally adopts a single-roller structure, and there is no constraint on the radial direction of the rolling elements. The rolling elements are prone to abnormal wear during high-speed operation, and there is a danger of jamming when overtaking, resulting in ACCIDENT.

Therefore, it is necessary to improve the existing overrunning clutch, simplify the processing and installation process, improve work efficiency, reduce processing costs, and ensure processing and assembly accuracy; more rolling elements can be set to ensure the stability, stability and load of the transmission ability; moreover, the rolling elements have appropriate constraints in the radial direction, avoiding large wear in the overrunning configuration, and ensuring service life, running accuracy and safety in use.

Contents of the invention

In view of this, the present invention provides a follow-up parallel roller overrunning clutch, which simplifies the processing and installation process, improves work efficiency, reduces processing costs, and ensures processing and assembly accuracy; more rolling bodies can be set to ensure the stability of transmission , stability and load capacity; and, it has proper radial constraints on the rolling elements to avoid greater wear in the overrunning configuration, ensuring service life, running accuracy and safety in use.

The follow-up parallel roller overrunning clutch of the present invention includes an outer ring, an inner ring and rolling elements, an meshing space for engaging or separating through rolling elements is formed between the outer ring and the inner ring, and a support roller assembly is also included. The backup roller assembly at least includes a backup roller set parallel to the axis of the overrunning clutch and spaced apart from the rolling elements. Both the outer circle of the supporting roller and the outer circle of the inner supporting roller are in contact with the outer circles of the adjacent rollers, and the outer supporting roller and the inner supporting roller are arranged to be movable in the circumferential direction of the overrunning clutch.

Further, an annular depression is formed on the axial end surface of the outer ring, the inner ring is rotatably fitted in the annular depression, and an engagement space is formed between the outer circle of the inner ring and the radially outer inner wall of the annular depression;

Further, the inner ring axially extends out of the annular depression of the outer ring, and the inner circle of the extension part has an inner ring support part that can cooperate with the installation shaft, and the inner circle of the outer ring has an outer ring support part that can cooperate with the installation shaft;

Further, the backup roller assembly also includes a backup roller bracket, and the outer backup roller and the inner backup roller are supported on the radial direction of the annular recess of the outer ring through the backup roller bracket in a manner that can slide along the circumferential direction of the overrunning clutch and rotate around its own axis. Between the outer inner wall and the outer circle of the inner ring;

Further, the support roll bracket includes a support ring I and a support ring II corresponding to the two ends of the support roll, and the axial end faces of the support ring I and the support ring II are respectively provided for the outer support roll and the support ring II. The two ends of the inner support roller penetrate the annular grooves along the circumferential direction of the support ring I and the support ring II, and the two ends of the outer support roller and the inner support roller are slidingly fitted with the corresponding annular grooves;

Further, the axial bottom of the annular depression of the outer ring is provided with an oil hole for passing lubricating oil, the support ring I is located at the axial bottom of the annular depression and the bottom of the annular groove of the support ring I is provided with an axial through hole;

Further, the meshing space is formed between the wedge-shaped groove machined on the outer circle of the inner ring and the radially outer inner wall of the annular depression of the outer ring;

Further, the inner ring support part of the inner ring is provided with an inner ring needle roller bearing for rotatable cooperation with the installation shaft, and the outer ring support part of the outer ring is provided with an outer ring needle roller bearing for rotatable cooperation with the installation shaft;

Further, the distribution of the axial through holes at the bottom of the annular groove of the support ring I corresponds to the outer support rollers and rolling elements;

Further, the diameter of the outer support roller is larger than the diameter of the inner support roller, and both ends of the outer support roller form constricted structures for penetrating into the annular grooves of the support ring I and the support ring II.

Beneficial effects of the present invention: the follow-up type parallel roller overrunning clutch of the present invention adopts an auxiliary roller structure independent of the outer ring and the inner ring, and adopts a follow-up structure to maintain the distance between rolling elements, canceling the existing Advanced elastic elements and limit seats avoid direct processing of limit seats on the outer ring or inner ring, simplify the processing process, improve work efficiency, reduce processing costs, ensure processing and assembly accuracy, prolong service life and ensure transmission effects, and related Parts are easy to replace after damage, reducing maintenance and use costs; due to the use of auxiliary roller structure, without using a separate elastic element, the axial length of the overrunning clutch and rolling elements can be extended theoretically, and the meshing length can be increased, thereby increasing the overrunning clutch. bearing capacity, and reduce the radial size of the overrunning clutch under higher load capacity, prolong the service life of the overrunning clutch; at the same time, because the double support rollers arranged along the radial direction are directly in contact with the rolling elements, not only eliminate the existing technology The unbalanced problem caused by the pre-tightening force applied to the point contact of the rollers also forms a balanced radial constraint on the rolling elements to ensure the limit balance of the rolling elements under the premise of a long axial dimension. , to avoid greater wear and tear in the overrunning configuration, and to avoid mechanical failures, to ensure service life, operating accuracy and safety in use.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a radial sectional view of Fig. 1 .

Detailed ways

Fig. 1 is a schematic diagram of the structure of the present invention, and Fig. 2 is a sectional view along the radial direction of Fig. 1, as shown in the figure: the follow-up parallel roller overrunning clutch of this embodiment includes an outer ring 1, an inner ring 2 and a rolling body 3. Between the outer ring 1 and the inner ring 2 is formed an engagement space for engagement or separation by the rolling elements 3, and also includes a support roller assembly, the support roller assembly includes at least a support parallel to the axis of the overrunning clutch and spaced from the rolling elements. The set of rollers, the set of supporting rollers at least includes outer supporting rollers and inner supporting rollers arranged in parallel in the radial direction of the overrunning clutch, and the outer circles of the outer supporting rollers and the outer circles of the inner supporting rollers are in contact with the outer circles of the adjacent roller , the outer support roller and the inner support roller are arranged in a movable manner in the circumferential direction of the overrunning clutch; the outer support roller refers to the radially outer support roller, while the inner support roller is arranged in parallel with the outer support roller and along The radial direction of the overrunning clutch is located on the inner side of the outer support roller. Since they are all in contact with the rolling elements, the diameter of the outer support roller is larger than the diameter of the inner support roller. The difference range is different according to the size of the overrunning clutch. Let’s repeat it again; the setting method for the support roller group to be movable along the circumferential direction of the overrunning clutch can be the installation structure of the prior art, so it will not be repeated here.

In this embodiment, an annular depression is formed on the axial end surface of the outer ring, and the inner ring 2 is rotatably arranged in the annular depression, and an engagement space is formed between the outer circle of the inner ring and the radially outer inner wall of the annular depression; beyond The structure of the rolling element 3 and the meshing space of the clutch belongs to the prior art, and will not be repeated here; since the axial end surface of the outer ring 1 forms an annular depression, its longitudinal section view forms a bow-like structure, and the inner ring is aligned after the inner ring is installed. The ring forms a radial support; the inner ring is located in the annular depression formed by the outer ring. The inner ring is embedded in the outer ring from the structure, so that the inner ring and the outer ring form a mutual support effect, avoiding the traditional structure. The ring is directly supported on the support shaft (transmission shaft), which also avoids the problem of transmission error being enlarged on the overrunning clutch. It not only ensures the overall stability of the overrunning clutch, but also improves the service life and running accuracy. It is suitable for heavy loads and high speeds. use environment.

In this embodiment, the inner ring 2 axially extends out of the annular depression of the outer ring 1 and the inner circle of the extension part has an inner ring support part 8 that can cooperate with the installation shaft, and the inner circle of the outer ring 1 has a support part 8 that can cooperate with the installation shaft. The outer ring support part 9; the installation shaft can be a transmission shaft for transmission, or a support shaft specially used to support the overrunning clutch, that is, the outer ring support part and the inner ring support part are both rotated and fitted on the support shaft; this structure The entire overrunning clutch is jointly supported by the inner ring and the outer ring to increase overall stability and ensure service life and transmission accuracy.

In this embodiment, the backup roller assembly further includes a backup roller bracket, and the outer backup roller 5 and the inner backup roller 4 are supported on the outer ring through the backup roller bracket in such a manner that they can slide along the circumferential direction of the overrunning clutch and rotate around their own axes. Between the inner wall on the radially outer side of the annular depression of 1 and the outer circle of the inner ring 2; this structure ensures the freedom of rotation or sliding of the support roller, thereby further ensuring the follow-up of the support roller, so that the rolling element and the support roller are beyond Rolling friction is formed when the clutch is running, which reduces power consumption and makes the stability of the overrunning clutch better.

In this embodiment, the backup roll bracket includes a support ring I10 and a support ring II6 corresponding to the two ends of the support roll, and the axial end faces of the support ring I10 and the support ring II6 are respectively provided for external The annular groove along the circumferential direction of the support ring I10 and the support ring II6 that the support roller 5 and the inner support roller 4 two ends penetrate, (the annular groove 10a on the support ring I10 is shown in Fig. 2, the annular groove on the support ring II6 6a is similar in structure to the annular groove 10a on the support ring I10 and both are inward), the two ends of the outer support roller 5 and the inner support roller 4 are slidably fitted with the corresponding annular grooves, that is, one end of the outer support roller 5 and the inner support roller One end of 4 corresponds to the annular groove 10a on the support ring I10, and the other end penetrates into the annular groove 6a on the support ring II6; the installation structure of the annular groove is adopted, the structure is simple, and the assembly is easy, which further simplifies the structure of the overrunning clutch and reduces the cost. The two ends of the outer support roller and the inner support roller are slidingly matched with the corresponding annular groove;

In this embodiment, the axial bottom of the annular depression of the outer ring 1 is provided with an oil hole 1a for passing lubricating oil, the support ring I10 is located at the axial bottom of the annular depression and the bottom of the annular groove 10a of the support ring I10 is provided with There is an axial through hole 10b; through the oil hole 1a, lubricating oil can be introduced and discharged, and together with the opening of the annular depression, a lubricating oil channel is formed to achieve better lubrication and cleaning, thereby ensuring the operation of the overrunning clutch.

In this embodiment, the meshing space is formed between the wedge-shaped groove machined on the outer circle of the inner ring 2 and the radially outer inner wall of the annular recess of the outer ring 1; the manufacturing process is simplified, the processing efficiency is improved, and the processing cost is reduced.

In this embodiment, the inner ring support portion 8 of the inner ring 2 is provided with an inner ring needle roller bearing for rotatable cooperation with the installation shaft, and the outer ring support portion 9 of the outer ring 1 is provided with an inner ring needle roller bearing for rotatable cooperation with the installation shaft. Needle roller bearings in the outer ring; the structure of needle roller bearings is adopted, which is suitable for installation to the support shaft, and the entire transmission structure has strong adaptability.

In this embodiment, the distribution of the axial through holes at the bottom of the annular groove of the support ring 1 corresponds to the outer support roller 5 and the rolling body 3; it can better and more directly provide lubrication.

In this embodiment, the diameter of the outer support roller is larger than the diameter of the inner support roller to ensure good radial constraints on the rolling elements 3; The necking structure of the ring groove of II; the necking structure can reduce the radial size of the support ring I and the support ring II while ensuring the large radial size of the outer backup roller, so as to ensure the overall compactness of the overrunning clutch; In an embodiment, the rolling elements are rollers.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (10)

1. a follow-up-type parallel rollers free wheel device, comprise outer ring, inner ring and rolling element, the engagement space being used for being engaged by rolling element or being separated is formed between described outer ring and inner ring, it is characterized in that: also comprise Support roller assembly, described supporting roller assembly at least comprises and is parallel to free wheel device axis and support roll group spaced with rolling element, described support roll group at least comprises along free wheel device radial side by side and the outer support roller be arranged in parallel and inner support roller, described outer support roller cylindrical all contacts with adjacent rolling element cylindrical with inner support roller cylindrical, described outer support roller and inner support roller are to arrange in the movable mode of the circumferencial direction of free wheel device.

2. follow-up-type parallel rollers free wheel device according to claim 1, it is characterized in that: described outer ring axial end forms ring-shaped depression, described inner ring is set in rotation with in this ring-shaped depression and engagement space and is formed between the inwall of inner ring cylindrical and ring-shaped depression radial outside.

3. follow-up-type parallel rollers free wheel device according to claim 2, it is characterized in that: described inner ring axially extends the ring-shaped depression of outer ring and extension part inner circle has the inner ring supporting portion that can coordinate with installation shaft, and described outer ring inner circle has the supporting portion, outer ring that can coordinate with installation shaft.

4. follow-up-type parallel rollers free wheel device according to claim 2, it is characterized in that: described supporting roller assembly also comprises supporting roller support, described outer support roller and inner support roller are with between the inwall that can slide and be supported in by supporting roller support around the mode of own axis the ring-shaped depression radial outside of outer ring along free wheel device circumferencial direction and inner ring cylindrical.

5. follow-up-type parallel rollers free wheel device according to claim 4, it is characterized in that: described supporting roller support comprises the pushing out ring I and pushing out ring II that arrange corresponding to support roll two ends, the axial end of described pushing out ring I and the axial end of pushing out ring II are respectively equipped with the circular groove along pushing out ring I and pushing out ring II circumferencial direction for penetrating for outer support roller and inner support roller two ends, and described outer support roller and inner support roller two ends are slidably matched with corresponding circular groove.

6. follow-up-type parallel rollers free wheel device according to claim 5, it is characterized in that: the ring-shaped depression of described outer ring is axially provided with for the oil-through hole by lubricant oil in bottom, described pushing out ring I is positioned at the axial bottom of ring-shaped depression and the circular groove bottom land of pushing out ring I is provided with axial hole.

7. follow-up-type parallel rollers free wheel device according to claim 6, is characterized in that: described engagement space is formed by between the wedge slot of inner ring Excircle machining and the inwall of the ring-shaped depression radial outside of outer ring.

8. follow-up-type parallel rollers free wheel device according to claim 3, it is characterized in that: the inner ring supporting portion of described inner ring is provided with the inner ring needle bearing for being rotatably assorted with installation shaft, the supporting portion, outer ring of described outer ring is provided with the cup needle roller bearings for being rotatably assorted with installation shaft.

9. follow-up-type parallel rollers free wheel device according to claim 8, is characterized in that: the distribution of the axial hole of the circular groove bottom land of described pushing out ring I is corresponding with outer support roller and rolling element.

10. follow-up-type parallel rollers free wheel device according to claim 5, is characterized in that: the diameter of described outer support roller is greater than the diameter of inner support roller, and the two ends of described outer support roller form the necking down structure of the circular groove for penetrating pushing out ring I and pushing out ring II.