Tensioning connection device for transfer case test
The automatic tensioning of the transfer case flange by the tensioning connection device solves the problems of cumbersome operation and wear when connecting the transfer case flange to the drive motor, simplifies operation and shortens cycle time, and provides stable NVH test conditions.
Patent Information
- Application Number
- CN202420368688.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-28
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-02-28
AI Technical Summary
In the existing technology, the connection between the transfer case flange and the drive motor is cumbersome, has a long production cycle, and is prone to wear.
The tensioning connection device includes a tensioning sleeve, a connecting shaft, a push rod, a spring, and a limiting ring. The axial force is converted into radial force through the limiting conical surface of the limiting ring and the tensioning sleeve, which automatically tensions the transfer case flange. Combined with friction transmission, relative movement is avoided, and uniform force is achieved.
It simplifies the docking operation between the transfer case flange and the drive motor, shortens the production cycle, avoids wear on the transfer case flange, and provides a stable basis for NVH testing.
Smart Images
Figure CN222334308U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an automobile transmission component, in particular to a tensioning connection device for testing a transfer case. Background Art
[0002] Noise, vibration and harshness (NVH) are systematic and comprehensive issues in automobile manufacturing quality. The NVH problem of automobiles is usually decomposed into multiple subsystems for separate research, such as powertrain, suspension system and body subsystem. In the powertrain system of a multi-axle driven automobile, a transfer case is usually set up to distribute the output power to each drive axle. Before the NVH test, the transfer case flange needs to be docked with the drive motor. The traditional docking method can be roughly divided into two categories, one is manual docking with manual tooling, and the other is docking with automatic clamping of the workpiece using docking equipment. Generally speaking, the advantage of manual docking is that the structural design is relatively simple and the investment cost is low. However, the disadvantages of traditional manual docking are also very obvious, such as the need for long manual cycles, the cumbersome operation of workers and the easy wear of tooling. Although the use of docking equipment to automatically clamp the workpiece can simplify the cumbersome operation to a certain extent, the traditional docking equipment often requires huge investment costs, and the traditional docking equipment also has the limitations of uneven force during docking and easy damage to the transfer case flange. Utility Model Content
[0003] In view of the defects of the prior art mentioned above, the technical problem to be solved by the present invention is to provide a tensioning connection device for transfer case testing, which can solve the problems of cumbersome operation, long production cycle and easy wear of the docking flange when the transfer case flange is docked with the drive motor.
[0004] To achieve the above-mentioned purpose, the utility model provides a tensioning connection device for testing a transfer case, which is used to connect the motor shaft of a driving motor and the transfer case flange of a transfer case for testing, and includes a tensioning sleeve, a connecting shaft, a push rod, a spring and a limiting ring. One end of the connecting shaft is fixedly connected to one end of the push rod, and the other end is fixedly connected to the tensioning sleeve. The spring applies elastic force to the push rod to drive the push rod to move away from the tensioning sleeve. A plurality of clearance grooves are provided on the outer circumferential surface of the tensioning sleeve. A limiting conical surface is also provided on the outer circumferential surface of the tensioning sleeve. The limiting ring is sleeved on the outer circumferential surface of the tensioning sleeve. When the limiting ring is in close contact with the limiting conical surface, a radial force can be applied to the tensioning sleeve to cause the tensioning sleeve to contract.
[0005] Furthermore, it also includes a fixed shaft cover, which is sleeved on the connecting shaft, and the connecting shaft can move axially relative to the shaft cover. The spring is sleeved on the connecting shaft, one end of the spring is against the shaft cover, and the other end is against the push rod.
[0006] Furthermore, it also includes a shell, the tension sleeve, connecting shaft, push rod, spring, shaft cover and limit ring are all arranged in the inner cavity of the shell, the shaft cover is fixed in the inner cavity of the shell, and the limit ring is fixedly connected to the shell.
[0007] Furthermore, there are a plurality of gap grooves on the tension sleeve, and the gap grooves are evenly arranged on the outer peripheral surface of the tension sleeve along the circumferential direction of the tension sleeve.
[0008] Furthermore, a coaxial first connecting hole and a second connecting hole are respectively provided at both ends of the push rod, one end of the connecting shaft is inserted into the second connecting hole and fixedly connected to the push rod, and the first connecting hole is used for inserting the motor shaft of the drive motor.
[0009] As described above, the tensioning connection device for transfer case testing of the present invention has the following beneficial effects:
[0010] By setting a tension sleeve and a limit ring, the axial force applied to the tension sleeve can be converted into a radial force by the limit ring and the limit conical surface of the tension sleeve. Under the action of the radial force, the inner diameter of the tension sleeve is continuously reduced, thereby automatically tightening the transfer case flange and connecting the motor shaft and the transfer case, providing a basis for NVH testing of the transfer case. The operation is simple and convenient, and the production cycle can be shortened. The tension sleeve drives the transfer case flange through friction transmission, and the force is evenly applied without relative movement, which can effectively avoid wear of the transfer case flange.
[0011] By setting a push rod, a connecting shaft and a spring, the rebound force of the spring can be used to move the push rod and the connecting shaft away from the tensioning sleeve in the axial direction, so that the push rod and the connecting shaft return to their initial state. At this time, the tensioning sleeve is no longer in close contact with the limit ring, the gap groove gradually expands, and the inner diameter of the tensioning sleeve continues to increase, which can provide a basis for tightening the next transfer case flange. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a structural diagram of the tensioning connection device for testing the transfer case in the utility model.
[0013] Figure 2 It is a schematic diagram of the tensioning connection device for testing the transfer case in the utility model.
[0014] Description of Figure Numbers
[0015] 1 tension sleeve
[0016] 101 Clearance slot
[0017] 102 Limiting cone
[0018] 2 Connecting shaft
[0019] 3 Putter
[0020] 301 First connection hole
[0021] 302 Second connection hole
[0022] 4 Spring
[0023] 5-axis cover
[0024] 6. Housing
[0025] 7 Limiting ring DETAILED DESCRIPTION
[0026] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0027] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.
[0028] See also Figure 1 to Figure 2 The utility model provides a tensioning connection device for testing a transfer case, which is used to connect the motor shaft of a driving motor with the transfer case flange of a transfer case for testing, and comprises a tensioning sleeve 1, a connecting shaft 2, a push rod 3, a spring 4 and a limiting ring 7. One end of the connecting shaft 2 is fixedly connected to one end of the push rod 3, and the other end is fixedly connected to the tensioning sleeve 1. The spring 4 applies elastic force to the push rod 3 to drive the push rod 3 to move in a direction away from the tensioning sleeve 1. A plurality of clearance grooves 101 are provided on the outer circumferential surface of the tensioning sleeve 1. A limiting conical surface 102 is also provided on the outer circumferential surface of the tensioning sleeve 1. The limiting ring 7 is sleeved on the outer circumferential surface of the tensioning sleeve 1. When the limiting ring 7 is in close contact with the limiting conical surface 102, the limiting ring 7 and the limiting conical surface 102 can apply radial force to the tensioning sleeve 1 to shrink the inner diameter of the tensioning sleeve 1, so that the transfer case flange is fixed in the tensioning sleeve 1.
[0029] The basic working principle of the tensioning connection device for the transfer case test involved in the utility model is as follows: first, the motor shaft is inserted into the push rod 3, and the transfer case flange is located in the inner cavity of the tensioning sleeve 1; the motor shaft pushes the push rod 3 along the axial direction, and the push rod 3 pushes the connecting shaft 2 to move synchronously toward the side where the tensioning sleeve 1 is located, and the spring 4 is compressed after receiving the thrust from the push rod 3. At the same time, the connecting shaft 2 drives the tensioning sleeve 1 to continue to approach the limiting ring 7. When the limiting conical surface 102 on the outer circumferential surface of the tensioning sleeve 1 is in close contact with the limiting ring 7, the axial force applied to the tensioning sleeve 1 can be converted into a radial force by the limiting conical surface 102 of the limiting ring 7 and the tensioning sleeve 1. Under the action of the radial force, the gap groove 101 gradually shrinks. At this time, the inner diameter of the tensioning sleeve 1 gradually shrinks, so that the tensioning sleeve 1 and the transfer case flange are fixedly installed together, so that the transfer case flange is tightened. At the same time, the motor shaft is connected through the push rod 3 and the connection. The connecting shaft 2 and the tensioning sleeve 1 are connected to the transfer case flange, so that the motor shaft is indirectly connected to the transfer case, which provides a basis for NVH testing of the transfer case; when the transfer case flange has been tightened, the motor shaft rotates and drives the transfer case to rotate through the connecting shaft 2, the tensioning sleeve 1 and the transfer case flange, so as to test the noise and vibration of the transfer case. The operation is simple and the production cycle can be shortened. The tensioning sleeve 1 drives the transfer case flange by friction transmission without relative movement, which can effectively avoid wear of the transfer case flange; and when the motor shaft leaves the push rod 3, the rebound force of the spring 4 can make the push rod 3 and the connecting shaft 2 move away from the tensioning sleeve 1 in the axial direction, so that the push rod 3 and the connecting shaft 2 return to the initial state. At this time, the tensioning sleeve 1 is no longer in close contact with the limit ring 7, the gap groove 101 gradually expands, the inner diameter of the tensioning sleeve 1 continues to increase, and the tensioning sleeve 1 is no longer fixedly connected to the transfer case flange.
[0030] See also Figure 1 to Figure 2 The present invention is further described below with a specific embodiment:
[0031] In this embodiment, see Figure 1 and Figure 2 As a preferred design, it also includes a fixed shaft cover 5, which is sleeved on the connecting shaft 2, and the connecting shaft 2 can move axially relative to the shaft cover 5. The spring 4 is sleeved on the connecting shaft 2 and has a stable position. One end of the spring 4 is against the shaft cover 5, and the other end is against the push rod 3. The shaft cover 5 can protect the spring 4 and increase the service life of the spring 4, and can also limit the axial movement of the spring 4 toward the tension sleeve 1, so that the spring 4 is fully compressed and the resilience of the spring 4 is increased.
[0032] In this embodiment, see Figure 1 and Figure 2As a preferred design, it also includes a shell 6, the tension sleeve 1, the connecting shaft 2, the push rod 3, the spring 4, the shaft cover 5 and the limit ring 7 are all arranged in the inner cavity of the shell 6, the shaft cover 5 is fixed in the inner cavity of the shell 6, the limit ring 7 is fixedly connected to the shell 6, the connecting shaft 2 and the push rod 3 can move in the shell 6, the shell 6 can effectively protect the tension sleeve 1, the connecting shaft 2, the push rod 3, the spring 4 and the shaft cover 5, and can improve the stability of the overall structure and increase the service life.
[0033] In this embodiment, see Figure 1 As a preferred design, there are multiple gap grooves 101 on the tension sleeve 1, and they are evenly arranged on the outer peripheral surface of the tension sleeve 1 along the circumference of the tension sleeve 1, so that the connection between the tension sleeve 1 and the transfer case flange is more stable, and the stability of the connection between the tension sleeve 1 and the transfer case flange is improved.
[0034] In this embodiment, see Figure 1 As a preferred design, the two ends of the push rod 3 are respectively provided with a coaxial first connection hole 301 and a second connection hole 302, one end of the connecting shaft 2 is inserted into the second connection hole 302 and fixedly connected to the push rod 3, and the first connection hole 301 is used for inserting the motor shaft of the driving motor. By providing the first connection hole 301 and the second connection hole 302, it is possible to facilitate the positioning connection of the motor shaft of the driving motor, ensure that the motor shaft is coaxial with the connecting shaft 2 and the tension sleeve 1, and when the motor shaft of the driving motor rotates, it can drive the push rod 3 and the connecting shaft 2 to rotate synchronously.
[0035] As can be seen from the above, the tensioning connection device for testing the transfer case of the utility model has the following beneficial effects:
[0036] By providing the tensioning sleeve 1 and the limiting ring 7, the axial force applied to the tensioning sleeve 1 can be converted into a radial force by the limiting ring 7 and the limiting conical surface 102 of the tensioning sleeve 1. Under the action of the radial force, the inner diameter of the tensioning sleeve 1 is continuously reduced, thereby automatically tightening the transfer case flange and connecting the motor shaft and the transfer case, thereby providing a basis for NVH testing of the transfer case. The operation is simple and convenient, and the production cycle can be shortened. In addition, the tensioning sleeve 1 drives the transfer case flange by friction transmission, and the force is evenly applied without relative movement, thereby effectively avoiding wear of the transfer case flange.
[0037] By setting the push rod 3, the connecting shaft 2 and the spring 4, the resilience of the spring 4 can be used to move the push rod 3 and the connecting shaft 2 away from the tensioning sleeve 1 in the axial direction, so that the push rod 3 and the connecting shaft 2 return to the initial state. At this time, the tensioning sleeve 1 is no longer in close contact with the limit ring 7, the gap groove 101 gradually expands, and the inner diameter of the tensioning sleeve 1 continues to increase, which can provide a basis for tightening the next transfer case flange.
[0038] In summary, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.
[0039] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.
Claims
1. A tension connection device for transfer case testing, used to connect the motor shaft of a drive motor with the transfer case flange of a transfer case for testing, characterized in that: The invention comprises a tension sleeve (1), a connecting shaft (2), a push rod (3), a spring (4) and a limiting ring (7); one end of the connecting shaft (2) is fixedly connected to one end of the push rod (3), and the other end is fixedly connected to the tension sleeve (1); the spring (4) applies elastic force to the push rod (3) to drive the push rod (3) to move in a direction away from the tension sleeve (1); a plurality of clearance grooves (101) are provided on the outer circumference of the tension sleeve (1); a limiting conical surface (102) is also provided on the outer circumference of the tension sleeve (1); the limiting ring (7) is sleeved on the outer circumference of the tension sleeve (1); when the limiting ring (7) is in close contact with the limiting conical surface (102), a radial force can be applied to the tension sleeve (1) to cause the tension sleeve (1) to contract.
2. The tension connection device for transfer case testing according to claim 1, characterized in that: It also includes a fixedly arranged shaft cover (5), the shaft cover (5) being sleeved on the connecting shaft (2), and the connecting shaft (2) being able to move axially relative to the shaft cover (5), the spring (4) being sleeved on the connecting shaft (2), one end of the spring (4) being in contact with the shaft cover (5), and the other end being in contact with the push rod (3).
3. The tension connection device for transfer case testing according to claim 2, characterized in that: It also includes a shell (6), wherein the tension sleeve (1), the connecting shaft (2), the push rod (3), the spring (4), the shaft cover (5) and the limiting ring (7) are all arranged in the inner cavity of the shell (6), the shaft cover (5) is fixed in the inner cavity of the shell (6), and the limiting ring (7) is fixedly connected to the shell (6).
4. The tension connection device for transfer case testing according to claim 1, characterized in that: There are a plurality of clearance grooves (101) on the tension sleeve (1), and the clearance grooves (101) are evenly arranged on the outer peripheral surface of the tension sleeve (1) along the circumferential direction of the tension sleeve (1).
5. The tension connection device for transfer case testing according to claim 1, characterized in that: The two ends of the push rod (3) are respectively provided with a coaxial first connecting hole (301) and a second connecting hole (302); one end of the connecting shaft (2) is inserted into the second connecting hole (302) and fixedly connected to the push rod (3); the first connecting hole (301) is used for inserting the motor shaft of the driving motor.