Damping spline mandrel of special vehicle

Abstract

The invention relates to the technical field of special vehicle parts, and discloses a damping spline mandrel of a special vehicle, which comprises a spline mandrel main body, the end part of the back surface of the spline mandrel main body is fixedly connected with a flange connecting shaft seat, and the spline mandrel main body is provided with a shaft body damping mechanism. A spline cooling mechanism is arranged at the end of the front face of the spline mandrel body, and the shaft body damping mechanism comprises a sleeve. The transmission function is integrally achieved through the sleeve, the elastic alloy strip can make contact with a driven part, torque is transmitted, the elastic alloy strip can generate elastic deformation when stressed, vibration on the driven part is buffered, the problem that vibration is synchronously transmitted to the driving part through the spline mandrel body is solved, the service life of the driving part is prolonged, and the service life of the driving part is prolonged. Through the design of the elastic alloy supporting legs and the elastic alloy rings, elastic deformation can be generated when the elastic alloy strips transmit torque, the strength of the elastic alloy strips is improved, and meanwhile the damping effect is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of special vehicle parts, and in particular to a shock-absorbing spline core shaft of a special vehicle. Background Art

[0002] Special vehicles refer to various types of special tank trucks, various special motor vehicles, van motor vehicles or motor vehicles equipped with fixed special instruments and equipment for professional work such as monitoring, fire fighting, money transport, medical treatment, television broadcasting, radar, X-ray inspection, etc. Special vehicles are based on the structural characteristics of the vehicle itself. Compared with the traditional structural form of the chassis of ordinary trucks, the structure of its chassis and the whole vehicle is quite special. It is specially designed and rarely uses universal assembly parts. Spline shaft is a kind of mechanical transmission, mainly used to transmit mechanical torque. The spline shaft is designed with longitudinal keyways on the surface of the shaft, and the rotating parts sleeved on the shaft also have corresponding keyways. This design enables the rotating parts to rotate synchronously with the shaft, and while rotating, some rotating parts can also slide longitudinally on the shaft, such as the shift gears of the gearbox. The application of spline shafts is very wide, including but not limited to brakes, steering mechanisms and some retractable shaft structures. These structures are usually composed of inner and outer tubes, the outer tube has inner teeth, and the inner tube has outer teeth. It can achieve telescopic extension in the length direction while transmitting rotational torque.

[0003] The existing spline mandrel has defects in the axial shock absorption function. The driven parts of the special vehicle will vibrate during the operation of the vehicle body. The vibration will be transmitted to the driving part through the spline mandrel, causing the driving part to vibrate. The vibration can easily cause the parts inside the driving part to fall off or be damaged, thereby affecting the service life of the driving part. Therefore, a spline mandrel with axial shock absorption is urgently needed. Summary of the invention

[0004] The purpose of the present invention is to provide a shock-absorbing spline core shaft for special vehicles, so as to solve the problem that the prior art has no axial shock-absorbing function and the vibration of the driven parts can easily lead to damage of the driving parts.

[0005] The present invention provides the following technical solution: a shock-absorbing spline shaft for a special vehicle, comprising a spline shaft body, the end of the back side of the spline shaft body is fixedly connected to a flange connection shaft seat, the spline shaft body is provided with a shaft shock-absorbing mechanism, and the end of the front side of the spline shaft body is provided with a spline cooling mechanism.

[0006] The shaft shock absorbing mechanism includes a sleeve, which is fixedly sleeved on the outer wall of the spline core shaft body, a ring is fixedly connected to the outer wall of the sleeve, a transmission spline is fixedly connected to the outer wall of the ring, a notch is opened on the side of the transmission spline, a support bar is fixedly connected to the inner wall of the notch, an elastic alloy bar is fixedly connected to the outer wall of the support bar, and a strip groove is opened on the outer surface of the elastic alloy bar.

[0007] As a preferred embodiment of the above technical solution, elastic alloy legs are fixedly connected to the inner walls of the notch and the elastic alloy strip, and elastic alloy rings are fixedly connected to the ends of the elastic alloy legs.

[0008] Through the above solution, the strength of the elastic alloy strip can be improved by the cooperation of the elastic alloy legs and the elastic alloy ring.

[0009] As a preferred embodiment of the above technical solution, the shaft shock-absorbing mechanism also includes a receiving shaft, and the front and back sides of the receiving shaft are rotatably connected with shock-absorbing circular shafts, and one end of the shock-absorbing circular shaft away from the receiving shaft is fixedly connected to the end in the middle of the spline core shaft body.

[0010] As a preferred embodiment of the above technical solution, the end of the supporting shaft is fixedly connected to an extension strip No. 1, the outer wall of the shock-absorbing circular shaft is fixedly connected to an extension strip No. 2, the side of the extension strip No. 2 is fixedly connected to an arc-shaped rubber elastic part, and the side of the arc-shaped rubber elastic part away from the extension strip No. 2 is fixedly connected to the side of the extension strip No. 1.

[0011] Through the above solution, the function of buffering in the direction of the spline core shaft body is achieved through the damping effect of the arc-shaped rubber elastic member.

[0012] As a preferred embodiment of the above technical solution, the elastic alloy strip, the elastic alloy leg and the elastic alloy ring are all made of high manganese-based damping alloy, and the arc-shaped rubber elastic part is made of polyurethane rubber.

[0013] As a preferred embodiment of the above technical solution, the spline cooling mechanism includes a connecting head, which is fixedly connected to the end of the front side of the spline core shaft body, and a threaded hole is opened on the front side of the connecting head. The front side of the connecting head is movably connected to a movable head, and the front side of the movable head is movably plugged with a fixing bolt, and the end of the fixing bolt is threadedly connected in the inner cavity of the threaded hole.

[0014] Through the above solution, through the design of the threaded hole and the fixing bolt, the movable head can be detachably connected to the spline core shaft body as a whole, which is convenient for the user to selectively install the movable head as a whole according to the use environment.

[0015] As a preferred embodiment of the above technical solution, a fitting groove is provided on the front side of the connecting head, and a fitting block is fixedly connected to the back side of the movable head, and the fitting block is movably inserted into the inner cavity of the fitting groove.

[0016] Through the above solution, the cooperation between the fitting groove and the fitting block improves the convenience and stability of assembling the connecting head and the movable head.

[0017] As a preferred embodiment of the above technical solution, a rotating sleeve is rotatably connected to the outer wall of the movable head, a connecting rod is fixedly installed on the outer wall of the rotating sleeve, and a cylinder is fixedly installed on one end of the connecting rod away from the rotating sleeve.

[0018] Through the above scheme, through the design of the rotating sleeve and the connecting rod, the cylinder and the movable head are in a rotating connection relationship, so that they form a whole, which is convenient for overall disassembly and assembly.

[0019] As a preferred embodiment of the above technical solution, a positioning foot is fixedly installed on the outer wall of the cylinder, a positioning hole is opened on the front of the positioning foot, a plug-in ring is movably inserted on the front of the cylinder, and an air filter is fixedly installed on the inner wall of the plug-in ring.

[0020] Through the above scheme, the air entering the cylinder from the front can be filtered through the design of the air filter, and the air filter can be easily disassembled and cleaned through the design of the plug-in ring.

[0021] As a preferred embodiment of the above technical solution, the front side of the movable head is fixedly connected to an extension shaft, the front side of the extension shaft extends into the inner cavity of the cylinder and is fixedly connected to a built-in shaft, and the outer wall of the built-in shaft is fixedly mounted with fan blades located in the inner cavity of the cylinder.

[0022] Through the above scheme, through the cooperation of the extended shaft and the built-in shaft, when the spline core shaft body rotates, the fan blades can be driven to rotate in the cylinder, absorbing air from the front of the cylinder and then outputting it from the back, thereby cooling the entire transmission spline.

[0023] Compared with the prior art, the present invention has the following beneficial effects: The present invention can realize the transmission function through the overall design of the sleeve. The elastic alloy strip will contact the driven part to transmit the torque. When the elastic alloy strip is subjected to force, it will produce elastic deformation to buffer the vibration on the driven part, avoid the problem that the vibration will be synchronously transmitted to the driving part through the spline core shaft body, and extend the service life of the driving part. Through the design of the elastic alloy legs and the elastic alloy rings, it can also produce elastic deformation when the elastic alloy strip transmits the torque, thereby improving the strength of the elastic alloy strip and ensuring the shock absorption effect. During the transmission of the spline core shaft body as a whole, the end of the shock-absorbing circular shaft will rotate at the end of the receiving shaft member. During the rotation, the No. 2 extension strip will move along a circular path, compressing a plurality of arc-shaped rubber elastic parts and stretching a plurality of arc-shaped rubber elastic parts at the same time. The damping effect produced by the arc-shaped rubber elastic parts realizes axial shock absorption of the vibration, improves the overall shock absorption effect of the spline core shaft body, and further ensures the safety of the driving part. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional diagram of a shock-absorbing spline mandrel for a special vehicle; Figure 2 It is a structural schematic diagram of the spline core shaft main body and the shaft body shock absorbing mechanism of the present invention; Figure 3 It is a structural schematic diagram of the sleeve of the present invention; Figure 4 for Figure 3 A schematic diagram of the enlarged structure at A in the middle; Figure 5 It is a schematic diagram of the overall exploded structure of the transmission spline of the present invention; Figure 6 It is a structural schematic diagram of the receiving shaft member of the present invention; Figure 7 for Figure 5 A schematic diagram of the enlarged structure at B in the middle; Figure 8 It is a structural schematic diagram of the spline cooling mechanism of the present invention; Fig. 9 It is a schematic diagram of the cutaway structure of the cylinder of the present invention; Fig.10 It is a schematic diagram of the structure of the fan blade of the present invention.

[0025] In the figure: 1. Spline core shaft body; 11. Flange connection shaft seat; 2. Shaft body shock absorption mechanism; 21. Sleeve; 211. Ring; 212. Transmission spline; 213. Notch; 214. Support bar; 215. Elastic alloy bar; 216. Strip groove; 217. Elastic alloy leg; 218. Elastic alloy ring; 22. Bearing shaft; 221. Shock absorption circular shaft; 222. No. 1 extension bar; 223. No. 2 extension bar; 224. Arc rubber elastic part; 3. Spline cooling mechanism; 31. Connecting head; 32. Threaded hole; 33. Movable head; 34. Fitting groove; 35. Fitting block; 36. Rotating sleeve; 361. Connecting rod; 362. Cylinder; 363. Plug-in ring; 364. Positioning foot; 37. Extension shaft; 371. Built-in shaft; 372. Fan blade.

[0026] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] like Figure 1-Figure 7As shown, the present invention provides a technical solution: a shock-absorbing spline core shaft of a special vehicle, comprising a spline core shaft body 1, a flange connecting shaft seat 11 is fixedly connected to the end of the back side of the spline core shaft body 1, a shaft body shock-absorbing mechanism 2 is arranged on the spline core shaft body 1, a spline cooling mechanism 3 is arranged at the front end of the spline core shaft body 1, the shaft body shock-absorbing mechanism 2 comprises a sleeve 21, the sleeve 21 is fixedly sleeved on the outer wall of the spline core shaft body 1, a collar 211 is fixedly connected to the outer wall of the sleeve 21, a transmission spline 212 is fixedly connected to the outer wall of the collar 211, a notch 213 is opened on the side of the transmission spline 212, a support bar 214 is fixedly connected to the inner wall of the notch 213, an elastic alloy bar 215 is fixedly connected to the outer wall of the support bar 214, and the elastic alloy bar A strip groove 216 is provided on the outer surface of 215. When the transmission is carried out as a whole through the spline core shaft body 1, the surface of the elastic alloy strip 215 will contact the driven part to transmit the torque. When the elastic alloy strip 215 is subjected to force, it will produce elastic deformation to buffer the vibration on the driven part, avoid the problem that the vibration will be synchronously transmitted to the driving part through the spline core shaft body 1, and extend the service life of the driving part. Through the design of the elastic alloy support leg 217 and the elastic alloy ring 218, it can also produce elastic deformation when the elastic alloy strip 215 transmits torque, thereby improving the strength of the elastic alloy strip 215 and ensuring the shock absorption effect. Through the design of the strip groove 216, the contact effect between the elastic alloy strip 215 and the driven part can be improved, and the stability of the transmission can be improved.

[0029] As an implementation method in this embodiment, Figure 1-Figure 7As shown, the notch 213 and the inner wall of the elastic alloy strip 215 are fixedly connected with an elastic alloy leg 217, and the end of the elastic alloy leg 217 is fixedly connected with an elastic alloy ring 218. The shaft body shock absorbing mechanism 2 also includes a receiving shaft member 22, and the front and back sides of the receiving shaft member 22 are rotatably connected with a shock absorbing circular shaft 221, and the end of the shock absorbing circular shaft 221 away from the receiving shaft member 22 is fixedly connected to the end in the middle of the spline core shaft body 1, and the end of the receiving shaft member 22 is fixedly connected to a No. 1 extension strip 222, and the outer wall of the shock absorbing circular shaft 221 is fixedly connected with a No. 2 extension strip 223, and the side of the No. 2 extension strip 223 is fixedly connected with an arc-shaped rubber elastic member 224, and the side of the arc-shaped rubber elastic member 224 away from the No. 2 extension strip 223 is connected to a The side of the No. 2 extension strip 222 is fixedly connected, the materials of the elastic alloy strip 215, the elastic alloy leg 217 and the elastic alloy ring 218 are all set to high manganese-based damping alloy, and the material of the arc rubber elastic member 224 is set to polyurethane rubber. When the spline core shaft body 1 is driven as a whole, the end of the shock-absorbing circular shaft 221 will rotate at the end of the receiving shaft member 22. During the rotation, the No. 2 extension strip 223 will move along a circular path, compressing several arc rubber elastic members 224 and stretching several arc rubber elastic members 224 at the same time. The damping effect generated by the arc rubber elastic member 224 realizes axial shock absorption of vibration, improves the overall shock absorption effect of the spline core shaft body 1, and further ensures the safety of the driving member.

[0030] As an implementation method in this embodiment, Figure 1 , Figure 8 , Fig. 9 , Fig.10 As shown, the spline cooling mechanism 3 includes a connector 31, which is fixedly connected to the end of the front side of the spline core shaft body 1, a threaded hole 32 is provided on the front side of the connector 31, a movable head 33 is movably connected to the front side of the connector 31, a fixing bolt is movably inserted into the front side of the movable head 33, and the end of the fixing bolt is threadedly connected to the inner cavity of the threaded hole 32, a fitting groove 34 is provided on the front side of the connector 31, and a fitting block 35 is fixedly connected to the back side of the movable head 33, and the fitting block 35 is movably inserted into the inner cavity of the fitting groove 34. The outer wall of the movable head 33 The upper part is rotatably connected with a rotating sleeve 36, and a connecting rod 361 is fixedly installed on the outer wall of the rotating sleeve 36. A cylinder 362 is fixedly installed on the end of the connecting rod 361 away from the rotating sleeve 36. The fitting block 35 is inserted into the fitting groove 34, and then the fixing bolt is passed through the movable head 33 and connected to the threaded hole 32 to complete the function of installing the movable head 33 as a whole at the end of the connecting head 31. Then, the positioning leg 364 is installed on the external vehicle body through the mounting hole of the positioning leg 364 with the help of external screws to complete the position fixation of the cylinder 362.

[0031] As an implementation method in this embodiment, Figure 1 , Figure 8 , Fig. 9 , Fig.10 As shown, a positioning foot 364 is fixedly installed on the outer wall of the cylinder 362, and a positioning hole is opened on the front of the positioning foot 364. A plug-in ring 363 is movably inserted on the front of the cylinder 362, and an air filter is fixedly installed on the inner wall of the plug-in ring 363. An extension shaft 37 is fixedly connected to the front of the movable head 33. The front of the extension shaft 37 extends into the inner cavity of the cylinder 362 and is fixedly connected to a built-in shaft 371. A fan blade 372 located in the inner cavity of the cylinder 362 is fixedly installed on the outer wall of the built-in shaft 371. During the rotation of the shaft body 1, the extension shaft 37 will be driven to rotate. At the same time, the fan blades 372 will be driven to rotate in the inner cavity of the cylinder 362 through the transmission of the built-in shaft 371, and then the air filtered by the air filter is absorbed from the front of the cylinder 362, and then transported to the outer surface of the transmission spline 212 from the back of the cylinder 362, so as to dissipate heat for the transmission spline 212 as a whole and extend its service life. The air filter is plugged into the front of the cylinder 362 through the plug-in ring 363, which is convenient for the user to disassemble and clean the air filter.

[0032] Working principle: When in use, the spline mandrel body 1 is installed on the driving part from the flange connection shaft seat 11, and then the gear of the driven part is meshed with the transmission spline 212. When the spline mandrel body 1 is used for transmission as a whole, the surface of the elastic alloy strip 215 will contact the driven part to transmit the torque. When the elastic alloy strip 215 is subjected to force, it will produce elastic deformation to buffer the vibration on the driven part. The end of the shock-absorbing circular shaft 221 will rotate at the end of the receiving shaft 22. When rotating, the second extension strip 223 will follow a circular path. The arc-shaped rubber elastic parts 224 are moved in the radial direction to compress the arc-shaped rubber elastic parts 224, and at the same time, the arc-shaped rubber elastic parts 224 are stretched. The damping effect produced by the arc-shaped rubber elastic parts 224 realizes the axial shock absorption processing of the vibration. If the transmission spline 212 as a whole needs to be cooled synchronously, the movable head 33 is pre-installed on the end of the spline core shaft body 1, and then the positioning support foot 364 is positioned. When the spline core shaft body 1 rotates, the fan blades 372 can be driven to rotate, so as to realize the function of blowing cooling of the transmission spline 212 as a whole.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A shock-absorbing spline mandrel for a special vehicle, comprising a spline mandrel body (1), characterized in that: The end of the back side of the spline mandrel body (1) is fixedly connected to a flange connection shaft seat (11), the spline mandrel body (1) is provided with a shaft body shock absorbing mechanism (2), and the end of the front side of the spline mandrel body (1) is provided with a spline cooling mechanism (3); The shaft damping mechanism (2) comprises a sleeve (21), the sleeve (21) being fixedly sleeved on the outer wall of the spline core shaft body (1), a sleeve ring (211) being fixedly connected to the outer wall of the sleeve (21), a transmission spline (212) being fixedly connected to the outer wall of the sleeve ring (211), a notch (213) being provided on the side of the transmission spline (212), a support bar (214) being fixedly connected to the inner wall of the notch (213), an elastic alloy bar (215) being fixedly connected to the outer wall of the support bar (214), and a strip groove (216) being provided on the outer surface of the elastic alloy bar (215).

2. The shock-absorbing spline mandrel for a special vehicle according to claim 1, characterized in that: The notch (213) and the inner wall of the elastic alloy strip (215) are both fixedly connected with elastic alloy legs (217), and the ends of the elastic alloy legs (217) are fixedly connected with elastic alloy rings (218).

3. The shock-absorbing spline mandrel for a special vehicle according to claim 1, characterized in that: The shaft body shock absorbing mechanism (2) further comprises a receiving shaft member (22), the front and back sides of the receiving shaft member (22) being rotatably connected to a shock absorbing circular shaft (221), and one end of the shock absorbing circular shaft (221) away from the receiving shaft member (22) being fixedly connected to the middle end of the spline core shaft body (1).

4. The shock-absorbing spline mandrel for a special vehicle according to claim 3, characterized in that: The end of the receiving shaft (22) is fixedly connected to a first extension strip (222), the outer wall of the shock-absorbing circular shaft (221) is fixedly connected to a second extension strip (223), the side of the second extension strip (223) is fixedly connected to an arc-shaped rubber elastic member (224), and the side of the arc-shaped rubber elastic member (224) away from the second extension strip (223) is fixedly connected to the side of the first extension strip (222).

5. The shock-absorbing spline mandrel for a special vehicle according to claim 4, characterized in that: The material of the elastic alloy strip (215), the elastic alloy leg (217) and the elastic alloy ring (218) are all set to be a high manganese-based damping alloy, and the material of the arc-shaped rubber elastic part (224) is set to be polyurethane rubber.

6. The shock-absorbing spline mandrel for a special vehicle according to claim 1, characterized in that: The spline cooling mechanism (3) comprises a connecting head (31), the connecting head (31) being fixedly connected to the end of the front side of the spline core shaft body (1), the front side of the connecting head (31) being provided with a threaded hole (32), the front side of the connecting head (31) being movably connected to a movable head (33), the front side of the movable head (33) being movably plugged with a fixing bolt, the end of the fixing bolt being threadedly connected to the inner cavity of the threaded hole (32).

7. The shock-absorbing spline mandrel for a special vehicle according to claim 6, characterized in that: The front side of the connecting head (31) is provided with a fitting groove (34), the back side of the movable head (33) is fixedly connected with a fitting block (35), and the fitting block (35) is movably inserted into the inner cavity of the fitting groove (34).

8. The shock-absorbing spline mandrel for a special vehicle according to claim 6, characterized in that: A rotating sleeve (36) is rotatably connected to the outer wall of the movable head (33), a connecting rod (361) is fixedly mounted on the outer wall of the rotating sleeve (36), and a cylinder (362) is fixedly mounted on one end of the connecting rod (361) away from the rotating sleeve (36).

9. The shock-absorbing spline mandrel for a special vehicle according to claim 8, characterized in that: A positioning foot (364) is fixedly mounted on the outer wall of the cylinder (362), a positioning hole is provided on the front of the positioning foot (364), a plug-in ring (363) is movably plugged into the front of the cylinder (362), and an air filter is fixedly mounted on the inner wall of the plug-in ring (363).

10. The shock-absorbing spline core shaft for a special vehicle according to claim 9, characterized in that: The front side of the movable head (33) is fixedly connected to an extension shaft (37), the front side of the extension shaft (37) extends into the inner cavity of the cylinder (362) and is fixedly connected to a built-in shaft (371), and the outer wall of the built-in shaft (371) is fixedly mounted with a fan blade (372) located in the inner cavity of the cylinder (362).

Images