CN112879453B - A kind of automatic switching device of inertia wheel - Google Patents

Abstract

The inertia wheel automatic switching device provided by the present application uses the hollow shaft as the rotating shaft of the inertia wheel, uses the central drive shaft passing through the interior of the hollow shaft as the inertia source, and uses the inner spline shaft and the first outer spline connected to the central drive shaft. The switching of the coordination mode between the key shaft and the second external spline shaft connected with the hollow shaft realizes the switching of inertia loading and unloading. The advantages of the device are that the device does not use a shifting fork structure with friction loss, the equipment has a long service cycle and a low failure rate, and does not use a lubricating oil device and an oil return device configured for the shifting fork structure, so the structure is simpler.

Description

A kind of automatic switching device of inertia wheel

technical field

The application belongs to the technical field of vehicle brake detection equipment, and in particular relates to an automatic switching device for inertia wheels.

Background technique

Vehicle braking performance is usually tested by an inertial test bench. The inertial test bench uses the rotational inertia of the inertia wheel to simulate the translational inertia of the actual braking process. In the existing inertial test bench, the size of the inertia wheel rotational inertia is different by replacement or combination. The mass inertia wheel is realized. According to different test conditions, it is necessary to adjust the loading and unloading of the inertia wheel inertia. However, due to the large weight of the inertia wheel, it is very inconvenient to manually disassemble and switch. Generally, it is fixed with bolts and flanges. The connection between the inertia wheel and the main shaft is realized by the movement of the gear sleeve, and the movement of the gear sleeve needs to be realized by the shifting fork structure. In addition, during the rotation of the gear sleeve, the shift fork will rub against the gear sleeve, so there is inevitable friction loss for the shift fork. Affects the accuracy and stability of the connection between the inertia wheel and the main shaft.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the present application provides an automatic switching device for inertia wheels.

The technical solution of this application is as follows:

An inertia wheel automatic switching device, comprising a base, a central transmission shaft arranged on the base; a first external spline shaft sleeved outside the central transmission shaft and rotated synchronously with the central transmission shaft;

It also includes an inertia wheel composition, which includes a hollow shaft that is sleeved on the outside of the central drive shaft; a hollow shaft that can rotate around the central drive shaft; an inertia wheel connected to the hollow shaft; and connected to the hollow shaft a second external spline shaft whose shaft is adjacent to the first external spline shaft; the second external spline shaft is sleeved outside the central transmission shaft and can rotate around the central transmission shaft;

A switching mechanism is also sleeved on the outside of the second external spline shaft, and the switching mechanism includes:

an internal spline shaft sleeved on the outside of the second external spline shaft and connected with it, and the internal spline shaft can be matched and connected with the first external spline shaft;

a first drive assembly, the first drive assembly is connected with the inner spline shaft, the first drive assembly is arranged on the base, and the inner spline shaft can push the lower shaft when the first drive assembly Move to a first position, where the inner spline shaft is connected to both the first outer spline shaft and the second outer spline shaft.

In some embodiments of the present application, the first drive assembly includes a first bearing sleeved on the outside of the inner spline shaft, a first bearing seat connected with the first bearing, and the first bearing seat A connected transition plate, a first drive member connected to the transition plate, and an installation plate fixed on the base, the first drive member is fixed on the installation plate, and the installation plate is further provided with A slide rail extending in the axial direction, and the transition plate can reciprocate along the slide rail under the push of the first driving member.

In some embodiments of the present application, the inertia wheel automatic switching device further includes a locking mechanism, and the locking mechanism can lock all the internal spline shafts to the first position when the first driving assembly pushes the inner spline shaft to the first position. The female spline shaft is locked in the first position.

In some embodiments of the present application, the locking mechanism includes a first positioning plate connected to the transition plate, a second positioning plate disposed on the mounting plate, and a second driving member disposed on the mounting plate , a second telescopic rod connected with the second driving member;

The second positioning plate has a first hole, and the first positioning plate has a second hole;

When the inner spline shaft is in the first position, the first hole is opposite to the second hole, and the second driving member can drive the second telescopic rod while passing through the first hole and the second hole.

In some embodiments of the present application, the first positioning plate is further provided with a third hole, and when the inner spline shaft is only connected with the second outer spline shaft, that is, the inner spline shaft is in the first position. In the second position, the third hole is opposite to the first hole, and the second driving member can drive the second telescopic rod to pass through the first hole and the third hole at the same time.

In some embodiments of the present application, the slide rail is arranged on the upper surface of the installation plate, the first driving member is installed on the lower surface of the installation plate, and the installation plate defines a first through hole, so The transition plate is fixedly connected with the connecting rod, and the connecting rod is connected with the first driving member through the first through hole.

In some embodiments of the present application, first involute gear teeth are provided at the ends of the first external spline shaft adjacent to the second external spline shaft, and the internal spline shaft is connected to the second external spline shaft. The inner side connected with an external spline shaft is provided with second involute gear teeth which can mesh with the first involute gear teeth.

In some embodiments of the present application, the inertia wheels are formed into two groups, and the two groups of inertia wheels are arranged symmetrically with respect to the first external spline shaft, and the first external spline shaft is formed with each set of inertia wheels The adjacent ends of the second external spline shaft are provided with first involute gear teeth, and the internal spline shaft that is connected with the first external spline shaft and is connected to the internal spline shaft. The first drive assembly is also provided with two groups, and the inner side of the two groups of inner spline shafts and the first outer spline shaft is connected with a second gear that can be meshed with the first involute gear teeth. Two involute gear teeth.

In some embodiments of the present application, the two groups of inertia wheels are composed of a first inertia wheel and a second inertia wheel, wherein the inertia wheels included in the first inertia wheel composition are called the first inertia wheel and the second inertia wheel. The inertia wheel included in the composition is called the second inertia wheel, and the mass of the first inertia wheel and the second inertia wheel are different.

In some embodiments of the present application, the inertia wheel composition is at least two groups, and the mass of the inertia wheel included in each inertia wheel composition is the same or different.

Compared with the prior art, the beneficial effects of the present application are:

The inertia wheel automatic switching device provided by the present application uses the hollow shaft as the rotating shaft of the inertia wheel, the central drive shaft passing through the hollow shaft as the source of inertia, and the first outer spline connected to the central drive shaft through the inner spline shaft. The switching of the coordination mode between the key shaft and the second external spline shaft connected with the hollow shaft realizes the switching of inertia loading and unloading. The advantages of the device are that the device does not use a shifting fork structure with friction loss, the equipment has a long service cycle and a low failure rate, and does not use a lubricating oil device and an oil return device for the shifting fork structure, so the structure is simpler.

There is no wear and positioning deviation between the inner spline shaft and the first drive assembly, so the fitting connection among the first outer spline shaft, the second outer spline shaft and the inner spline shaft is more accurate and stable.

The inner spline shaft and the first outer spline shaft are driven by the first driving member to cooperate with each other, and the inner spline shaft and the first outer spline shaft are provided with matching involute gear teeth, and the meshing of the gear teeth realizes the two The mating connection will not have severe impact when engaging.

The first external spline shaft, the second external spline shaft and the internal spline shaft are installed through bearings, the bearing has a long service life and is easy to replace.

When the inertia wheel is loaded with inertia, the locking mechanism locks the position of the first bearing seat and the transition plate to prevent them from rotating together with the central transmission shaft and the inner spline shaft.

The number of inertia wheel components can be flexibly increased according to needs, and the inertia load of each group of inertia wheel components can be independently controlled, which greatly broadens the test range of inertia test.

Description of drawings

FIG. 1 is a schematic structural diagram 1 of an inertia wheel automatic switching device according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram 2 of an inertia wheel automatic switching device according to an embodiment of the present application;

3 is a schematic cross-sectional view along section line A-A in FIG. 1;

4 is a schematic structural diagram 1 of a first drive assembly and an internal spline shaft according to an embodiment of the present application;

Figure 5 is a schematic cross-sectional view along section line B-B in Figure 4;

6 is a schematic structural diagram 2 of a first drive assembly and an internal spline shaft according to an embodiment of the present application;

7 is a schematic structural diagram 3 of a first drive assembly and an internal spline shaft according to an embodiment of the present application;

8 is a cross-sectional view of an automatic switching device for an inertia wheel according to an embodiment of the present application;

9 is a schematic structural diagram of a central drive shaft and a first external spline shaft according to an embodiment of the present application;

Figure 10 is a cross-sectional view of the central drive shaft and the first external spline shaft in Figure 9;

11 is a cross-sectional view of a hollow shaft and flywheel of one embodiment;

In the figure: 1, the base; 2, the central drive shaft; 21, the second bearing; 22, the second bearing seat; 3, the first external spline shaft; 31, the first involute gear tooth; 41, the hollow shaft; 411, the third bearing; 412, the third bearing seat; 42, the inertia wheel; 43: the second external spline shaft; 431, the external spline part; 432, the connecting shaft part; 5, the internal spline shaft; 51, the block plate; 52, second involute gear teeth; 6, first drive assembly; 61, first bearing; 62, first bearing seat; 63, transition plate; 64, first drive member; 641, first telescopic rod 65, mounting plate; 651, first through hole; 66, slide rail; 67, connecting rod; 7, locking mechanism; 71, first positioning plate; 711, first hole; 72, second positioning plate; 721, The second hole; 722, the third hole; 73, the second driving member; 731, the second telescopic rod.

Detailed ways

The technical solutions of the present application will be described in detail below in conjunction with specific embodiments, however, it should be understood that elements, structures and features in one embodiment can also be beneficially combined into other embodiments without further description.

In the description of this application, it should be understood that the terms "first", "second" and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying the indicated Number of technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature.

In the description of this application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the orientations or positional relationships shown in the corresponding drawings, only It is to facilitate the description of the present invention and to simplify the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated connection. Ground connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The described embodiments are only to describe the preferred embodiments of the present application, not to limit the scope of the present application. On the premise of not departing from the design spirit of the present application, various modifications made by those of ordinary skill in the art to the technical solutions of the present application and improvements, shall fall within the scope of protection determined by the claims of this application. For ease of description, the direction parallel to the axis of the central drive shaft is referred to as the axial direction.

As shown in Figs. 1-3, an inertia wheel automatic switching device provided for an embodiment of the application includes a base 1, a central drive shaft 2 arranged on the base 1; The first external spline shaft 3 that the transmission shaft 2 rotates synchronously;

It also includes an inertia wheel composition, and the inertia wheel composition includes a hollow shaft 41 that is sleeved on the outside of the central drive shaft 2 and can rotate around the central drive shaft 2, an inertia wheel 42 connected to the hollow shaft 41, and connected to the hollow shaft 41 and the first. The second external spline shaft 43 adjacent to the external spline shaft 3; the second external spline shaft 43 is sleeved outside the central transmission shaft 2 and can rotate around the central transmission shaft 2;

A switching mechanism is also sleeved on the outside of the second external spline shaft 43, and the switching mechanism includes:

an inner spline shaft 5 sleeved on the outside of the second outer spline shaft 42 and connected with it, and the inner spline shaft 5 can be connected with the first outer spline shaft 3;

The first drive assembly 6, the first drive assembly 6 is connected with the inner spline shaft 5, the first drive assembly 6 is arranged on the base 1, and the inner spline shaft 5 can be moved axially to the first drive assembly 6 under the push of the first drive assembly 6. In the first position, the inner spline shaft 5 is connected with both the first outer spline shaft 3 and the second outer spline shaft 43 .

In the inertia wheel automatic switching device provided by the present application, the inertia wheel 42 is stably supported on the base 1 through the hollow shaft 41, the hollow shaft 41 drives the inertia wheel 42 to rotate, and then the inertia wheel 42 obtains the inertia load, and the inertia output of the inertia wheel 42 is more Stablize. Pushed by the first drive assembly 6, the inner spline shaft 5 reciprocates in the axial direction. When the inner spline shaft 5 is only connected with the second outer spline 43, the inertia wheel 42 does not rotate with the central transmission shaft 2. When When the inner spline shaft 5 is connected with the first outer spline shaft 3 and the second outer spline shaft 43 at the same time, the central transmission shaft 2 drives the first outer spline shaft 3 to rotate, and the first outer spline shaft 3 passes through the inner spline shaft 3. The key shaft 5 drives the second external spline shaft 43 to rotate together, and further drives the inertia wheel 42 connected with the second external spline shaft 43 to rotate together. At this time, the inertia wheel 42 is loaded with inertia.

Specifically, as shown in FIGS. 4 and 5 , the first drive assembly 6 includes a first bearing 61 sleeved on the outside of the inner spline shaft 5 , a first bearing seat 62 connected with the first bearing 61 , and a first bearing 62 connected with the first bearing The transition plate 63 connected to the seat 62, the first driving member 64 connected to the transition plate 63, and the mounting plate 65 fixed on the base 1, the first driving member 64 is fixed on the mounting plate 65, and the mounting plate 65 is also provided with The slide rail 66 extends in the axial direction, and the transition plate 63 can reciprocate along the slide rail 66 under the push of the first driving member 64 , so that the transition plate 63 can drive the internal spline shaft 5 to move to the first position. The first bearing 61 is fixed to the first bearing seat 62 through the bearing seat end cover 621 . The side adjacent to the inner spline shaft 5 and the inertia wheel 42 is connected with a baffle plate 51, and the baffle plate 51 protrudes from the inner wall of the inner spline shaft 5. As shown in FIG. 11, the second outer spline shaft 43 includes an outer spline part 431 and the connecting shaft portion 432, the external spline portion 431 protrudes from the connecting shaft portion 432, and the protruding external spline portion 431 just limits the movement range of the protruding baffle 51, thereby preventing the internal spline shaft 5 from breaking away from the second external spline Axle 43. The first driving member 64 pushes the transition plate 63, and the transition plate 63 drives the first bearing seat 62 to move. During the moving process, the first bearing seat 62 is sleeved outside the inner spline shaft 5, so the side surface of the first bearing seat 62 does not need to be connected to the inside. The spline shaft 5 is in contact to apply a pushing force to the inner spline shaft 5, and the movement of the inner spline shaft 5 can also be realized. Therefore, the side surface of the first bearing seat 62 will not be worn with the inner spline shaft 5, and therefore will not be worn. The positioning of the internal spline shaft 5 is affected, and thus the mating connection between the internal spline shaft 5 and the first external spline shaft 3 is not affected.

Preferably, as shown in FIGS. 4-6 , the automatic inertia wheel switching device further includes a locking mechanism 7 , and the locking mechanism 7 can lock the inner spline shaft 5 when the first drive assembly 6 pushes the inner spline shaft 5 to the first position. 5 is locked in the first position. The locking mechanism 7 is used to stably position the inner spline shaft 5 at the first position, and maintain the stable mating connection of the inner spline shaft 5 with the first outer spline shaft 3 and the second outer spline shaft 43 .

Specifically, as shown in FIGS. 4 , 6 and 7 , the locking mechanism 7 includes a first positioning plate 71 connected to the transition plate 63 , a second positioning plate 72 disposed on the mounting plate 65 and disposed on the mounting plate 65 The second driving member 73, the second telescopic rod 731 connected with the second driving member 73; the second positioning plate 72 has a first hole 711, the first positioning plate 71 has a second hole 721, the inner spline shaft 5 is in the In the first position, the first hole 711 is just opposite to the second hole 721 , and the second driving member 73 can drive the second telescopic rod 731 to pass through the first hole 711 and the second hole 721 at the same time. The second telescopic rod 731 passing through the first hole 711 and the second hole 721 limits the relative movement of the second positioning plate 72 and the first positioning plate 71 in the axial direction, thereby limiting the internal spline shaft 5 to the first position . As shown in FIG. 8 , the inner spline shaft 5 on the left is connected with the first outer spline shaft 3 and the second outer spline shaft 43 at the same time. At this time, when the central drive shaft 2 rotates, the The inertia wheel 42 is loaded by inertia, and the inner spline shaft 5 on the right side is only matched and connected with the second outer spline shaft 43 . When the central transmission shaft 2 rotates, the inertia wheel 42 on the right side is not loaded by inertia.

Optionally, the first positioning plate 71 is further provided with a third hole 722. When the inner spline shaft 5 is only connected with the second outer spline shaft 43, that is, when the inner spline shaft 5 is in the second position, the third hole 722 is formed. 722 is just opposite to the first hole 711, the second telescopic rod 731 extends and retracts in the axial direction, and the second driving member 73 can drive the second telescopic rod 731 to pass through the first hole 711 and the third hole 722 at the same time, so that the inner flower The key shaft 5 is defined in the second position. The second telescopic rod 731 passing through the first hole 711 and the third hole 722 limits the relative movement of the second positioning plate 72 and the first positioning plate 71 in the axial direction, thereby limiting the internal spline shaft 5 to the second position , to prevent the position of the internal spline shaft 5 from changing due to the influence of mechanical vibration. As shown in FIG. 3 , the inner spline shaft 5 is in the second position, which only engages with the second outer spline shaft 43 .

In order not to limit the axial movement of the inner spline shaft, as shown in Figures 4 and 6, the slide rail 66 is arranged on the upper surface of the mounting plate 65, the first driving member 64 is mounted on the lower surface of the mounting plate 65, and the mounting plate A first through hole 651 is opened on the 65 , the transition plate 63 is fixedly connected with the connecting rod 67 , and the connecting rod 67 is connected with the first driving member 64 through the first through hole 651 . The connecting rod 67 is fixedly connected with the transition plate 63, and the first driving member 64 includes a first telescopic rod 641 fixedly connected with the connecting rod 67. The first telescopic rod 641 is axially telescopic, thus pushing the connecting rod 67 to move in the axial direction, and further The transition plate 63 is driven to move axially. When the inner spline shaft 5 travels back and forth between the first position and the second position, the first through hole 651 will not hinder the movement of the connecting rod 67 . A telescopic cylinder can be selected as the first driving member 64. By precisely controlling the telescopic distance of the telescopic cylinder and controlling the matching connection between the inner spline shaft 5 and the first outer spline shaft 3 and the second outer spline shaft 43, the inertia wheel can be accurately controlled. 42 inertial loading.

Specifically, the action association between the first driving member 64 and the second driving member 73 can be realized by a magnetic switch, and the magnetic switch is provided in the first driving member 64 . The second driving member 73 can be selected as a telescopic cylinder. When the first driving member 64 drives the inner spline shaft 5 to the first position, the magnetic switch is triggered, and the magnetic switch controls the second driving member 73 to start, and then drives the second telescopic rod 731 stretch out.

Specifically, as shown in FIG. 9 and FIG. 10 , a second bearing 21 is provided on the center drive shaft 2 , the second bearing 21 is connected with the second bearing seat 22 , and the second bearing seat 22 is fixedly connected with the base 1 . One end of the central drive shaft can be connected to the third driving member through a coupling, thereby providing an inertial source for the inertia wheel. The third driving member is a device that generates driving torque, for example, a motor can be selected for the third driving member. The other end of the central drive shaft is connected to the components that need to be tested by inertial experiments, such as brakes.

Specifically, as shown in FIG. 9 and FIG. 10 , the first external spline shaft 3 is keyed to the central transmission shaft 2 . As shown in FIG. 5 and FIG. 9 , the adjacent ends of the first external spline shaft 3 and the second external spline shaft 43 are provided with first involute gear teeth 31 , and the internal spline shaft 5 and the first external spline shaft 43 are provided with first involute gear teeth 31 . The inner side where the key shaft 3 is connected is provided with a second involute gear tooth 52 that can mesh with the first involute gear tooth 31 . When the first drive member 64 pushes the inner spline shaft 5 to reciprocate in the axial direction, when the inner spline shaft 5 only meshes with the gear teeth of the second outer spline 43, the inertia wheel 42 does not rotate together with the central transmission shaft 2 , when the internal spline shaft 5 meshes with the gear teeth of the first external spline shaft 3 and the second external spline shaft 43 at the same time, the central drive shaft 2 drives the first external spline shaft 3 to rotate, and the first external spline shaft 3 rotates. 3. The inner spline shaft 5 drives the second outer spline shaft 43 to rotate together, and then drives the inertia wheel 42 connected with the second outer spline shaft 43 to rotate together. At this time, the inertia wheel 42 is loaded with inertia.

Usually, in order to facilitate the meshing of the inner spline shaft 3 with the first outer spline shaft 43 , the central transmission shaft 2 rotates at a low speed, thereby driving the first outer spline shaft 3 to rotate at a low speed, and the inner spline shaft 5 is under the action of the first driving member 64 . Approaching the first external spline shaft 3, when the first external spline shaft 3 rotates until the first involute gear teeth 31 mesh with the second involute gear teeth 52, the first driving member 64 further drives the internal spline shaft 5 is pushed in the axial direction, so as to realize the stable fitting connection between the inner spline shaft 5 and the first outer spline shaft 3 . The axial movement distance of the inner spline shaft 5 will not make the inner spline shaft 5 separate from the second outer spline shaft 43, so that the inner spline shaft 5 can be simultaneously connected with the first outer spline shaft 3 and the second outer spline shaft 43. The shaft 43 is matingly connected. After the inner spline shaft 5 is connected with the first outer spline shaft 3 and the second outer spline shaft 43 at the same time, the rotational speed of the central drive shaft 2 is increased, and then the inertia wheel 42 connected with the second outer spline shaft 43 is loaded by inertia. .

Optionally, as shown in FIG. 11 , the hollow shaft 41 is a stepped shaft, and the inertia wheel 42 is fixedly connected to the hollow shaft 41 through screws. Both ends of the hollow shaft 41 are mounted on the base 1 through the cooperation of the third bearing 411 and the third bearing seat 412 , so that the base 1 supports the inertia wheel 42 . The hollow shaft 41 and the second external spline 43 are fixedly connected by screws.

Optionally, as shown in Figures 1-3, the inertia wheels sleeved on the outside of the central drive shaft 2 are formed into two groups, and the two groups of inertia wheels are arranged symmetrically about the first external spline shaft 3, and the first external spline shaft is formed. 3 is a symmetrical structure, that is, the adjacent ends of the first external spline shaft 3 and the second external spline shaft 43 composed of each set of inertia wheels are provided with first involute gear teeth 31, which are connected with the first external spline shaft 31. The inner spline shaft 5 to which the key shaft 3 is matched and the first drive assembly 6 connected to the inner spline shaft 5 are also provided in two groups. There are second involute gear teeth 52 that can mesh with the first involute gear teeth 31 , and each group of inner spline shafts 5 can be driven by a group of first drive assemblies 6 to reciprocate in the axial direction.

Optionally, the two groups of inertia wheels are composed of a first inertia wheel and a second inertia wheel, wherein the inertia wheels included in the first inertia wheel composition are called the first inertia wheel, and the second inertia wheel composition includes The inertia wheel is called the second inertia wheel, and the mass of the first inertia wheel and the second inertia wheel are different. During the inertia test, inertia wheels with different masses can be set according to the test requirements, so that the inertia required for the test can be obtained through the superposition and combination of inertia wheels with different masses.

Optionally, there are at least two sets of inertia wheels sleeved on the outside of the central drive shaft, for example, two sets, three sets or more, and the mass of the inertia wheels included in each set of inertia wheels is the same or different. The inertia loading composed of each set of inertia wheels can be independently controlled, which greatly broadens the test range of inertia test.

The present application will be described in detail below with reference to the embodiments. It should be understood that these embodiments are only some preferred embodiments of the present application, and should not be construed as limiting the protection scope of the present application.

Example

As shown in Figures 1-3, an inertia wheel automatic switching device includes a base 1, a central drive shaft 2 arranged on the base 1; The external spline shaft 3; also includes two sets of inertia wheels, both of which include a hollow shaft 41 sleeved on the outside of the central drive shaft 2 and rotatable around the central drive shaft 2, and an inertia wheel connected with the hollow shaft 41 42, and the second external spline shaft 43 connected to the hollow shaft 41 adjacent to the first external spline shaft 3; the second external spline shaft 43 is sleeved outside the central transmission shaft 2 and can rotate around the central transmission shaft 2 ;

The second external spline shaft 43 is also sleeved with an internal spline shaft 5 meshing with it, and the internal spline shaft 5 can be meshed with the first external spline shaft 3;

The inner spline shaft 5 is connected with the first drive assembly 6, the first drive assembly 6 is fixed on the base 1, and the inner spline shaft 5 can be moved axially to the first position under the push of the first drive assembly 6. In the first position , the inner spline shaft 5 meshes with the first outer spline shaft 3 and the second outer spline shaft 43;

The mass of the inertia wheels composed of the two sets of inertia wheels can be the same or different.

Claims (9)

1. An automatic switching device of an inertia wheel is characterized by comprising a base and a central transmission shaft arranged on the base; the first external spline shaft is sleeved outside the central transmission shaft and synchronously rotates with the central transmission shaft;

the inertia wheel assembly is sleeved outside the central transmission shaft; a hollow shaft rotatable about the central drive shaft; an inertia wheel connected with the hollow shaft; and a second male spline shaft connected to the hollow shaft adjacent the first male spline shaft; the second external spline shaft is sleeved outside the central transmission shaft and can rotate around the central transmission shaft;

the outside switching mechanism that still overlaps of second external spline axle, switching mechanism includes:

the female spline shaft is sleeved outside the second male spline shaft and is in fit connection with the second male spline shaft, and the female spline shaft can be in fit connection with the first male spline shaft;

the first driving assembly is connected with the inner spline shaft, the first driving assembly is arranged on the base, the inner spline shaft can move axially to a first position under the pushing of the first driving assembly, and the inner spline shaft is connected with the first outer spline shaft and the second outer spline shaft in the first position;

first drive assembly locates including the cover the outside first bearing of internal spline axle, with the first bearing that first bearing is connected, with the cab apron of crossing that first bearing is connected, with cross the first driving piece that the cab apron is connected, and fix mounting panel on the base, first driving piece is fixed in on the mounting panel, still be provided with along axially extended's slide rail on the mounting panel, and cross the cab apron and can follow under the first driving piece promotes slide rail reciprocating motion.

2. The automatic inertia wheel shifting apparatus of claim 1, further comprising a locking mechanism operable to lock the spline shaft in the first position when the first drive assembly pushes the spline shaft to the first position.

3. The automatic inertia wheel switching device of claim 2, wherein the locking mechanism comprises a first positioning plate connected to the transition plate, a second positioning plate disposed on the mounting plate, a second driving member disposed on the mounting plate, and a second telescopic rod connected to the second driving member; the first positioning plate is provided with a second hole, and the second positioning plate is provided with a first hole;

when the internal spline shaft is located at the first position, the first hole is opposite to the second hole, and the second driving piece can drive the second telescopic rod to simultaneously penetrate through the first hole and the second hole.

4. The automatic inertia wheel switching device of claim 3, wherein the first positioning plate further has a third hole, the third hole is opposite to the first hole when the spline shaft is connected to the second spline shaft only, i.e. when the spline shaft is in the second position, and the second driving member can drive the second telescopic rod to pass through the first hole and the third hole simultaneously.

5. The automatic inertia wheel switching device of claim 4, wherein the slide track is disposed on an upper surface of the mounting plate, the first driving member is mounted on a lower surface of the mounting plate, the mounting plate is provided with a first through hole, the transition plate is fixedly connected to the connecting rod, and the connecting rod passes through the first through hole and is connected to the first driving member.

6. An automatic inertia wheel switching device according to claim 4, wherein the end of the first male spline shaft adjacent to the second male spline shaft is provided with first involute gear teeth, and the inner side of the female spline shaft connected to the first male spline shaft is provided with second involute gear teeth capable of meshing with the first involute gear teeth.

7. An automatic switching device for inertia wheels according to any one of claims 1 to 6, wherein two sets of inertia wheels are provided, the two sets of inertia wheels are symmetrically provided about the first external spline shaft, the first external spline shaft is provided with first involute gear teeth at the end adjacent to the second external spline shaft formed by each set of inertia wheels, the internal spline shaft connected with the first external spline shaft in a matching manner and the first driving assembly connected with the internal spline shaft are also provided with two sets, and the inner sides of the two sets of internal spline shafts connected with the first external spline shaft are provided with second involute gear teeth capable of being engaged with the first involute gear teeth.

8. The automatic switching device of inertia wheels according to claim 7, wherein the two sets of inertia wheels are a first inertia wheel set and a second inertia wheel set respectively, wherein the inertia wheel included in the first inertia wheel set is called a first inertia wheel, the inertia wheel included in the second inertia wheel set is called a second inertia wheel, and the first inertia wheel and the second inertia wheel have different masses.

9. The automatic inertia wheel switching apparatus according to any one of claims 1 to 6, wherein the inertia wheels are formed in at least two sets, and each set of inertia wheels includes inertia wheels having the same or different mass.

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