Novel elastic crush-proof end face tooth spline seat

Abstract

The utility model provides a novel elastic anti-crush end face tooth spline seat, which comprises a base, a spring, a top seat, a spline seat and a pressing sleeve, the base is a hollow piece, and the top seat is sleeved in the base; the spring is arranged between the outer circumferential surface of the top seat and the inner circumferential surface of the base in a sleeving manner; the spline seat is arranged on the upper side of the spring and can move between the outer circumferential face of the top seat and the inner circumferential face of the base in the axial direction through the spring. The pressing sleeve is arranged on the end face, away from the top base, of the base and limits the axial movement of the spline base. The split type structure is adopted, circumferential rotation stress of the spline seat and axial stress of press-in and secondary press-in are designed separately, it is guaranteed that the spline seat only bears spring force during press-in and secondary press-in, and the spline teeth on the end face of the besides-star wheel are prevented from being pressed by press force to damage splines.

Description

Technical Field

[0001] The utility model relates to the technical field of end spline tooth type fixed joint pressing, in particular to a novel elastic anti-pressing damage end tooth spline seat. Background Art

[0002] The constant velocity drive shaft is an important component for transmitting power in the automotive transmission system. Its function is to transmit the power of the engine to the wheels to generate driving force for the vehicle. In the constant velocity drive shaft, the fixed joint pressing is an important assembly process. In the process of pressing the fixed joint and the shaft during the assembly of the constant velocity drive shaft assembly, it is necessary to align and engage the spline of the shaft head at the fixed end of the shaft with the internal star wheel spline of the fixed joint, and then perform pressing. This process of aligning the splines is commonly known as "splicing splines". When splicing splines, the shaft is locked in the circumferential direction, and the fixed joint rotates in the circumferential direction, and the two rotate relative to each other to complete the spline alignment action. In addition to the above process of splicing splines → pressing, after pressing, operations of reverse pulling → secondary pressing are also carried out.

[0003] Since the internal star wheel of the fixed joint is arranged in the external star wheel of the fixed joint, the rotation of the fixed joint in the circumferential direction is realized by driving the rotation of the internal star wheel by the external star wheel. The external star wheel has two types: end spline teeth and a shank spline. In the above process of splicing splines → pressing → reverse pulling → secondary pressing, the conventional external star wheel end tooth spline seat is subjected to splicing splines and pressing by engaging and bearing force through the end teeth. However, due to the short mating length of the end teeth, during the reverse pulling process, the mating of the end teeth of the external star wheel comes out, and then the splicing spline cylinder resets, resulting in a risk of collision between the end teeth of the spline seat and the end teeth of the external star wheel during the secondary pressing process. And the end teeth of the external star wheel are directly forged and not heat-treated, so the collision between the teeth during the secondary pressing process will cause extrusion damage to the end teeth of the external star wheel. Summary of the Utility Model

[0004] In view of the above-mentioned disadvantages of the prior art, the technical problem to be solved by the present utility model is to provide a novel elastic anti-pressing damage end tooth spline seat, which is used to solve the risk of collision between the end teeth of the spline seat and the end teeth of the external star wheel during the secondary pressing process, resulting in extrusion damage to the end teeth of the external star wheel.

[0005] To achieve the above object, the present utility model provides a novel elastic anti-pressing damage end tooth spline seat, which includes a base, a spring, a top seat, a spline seat, and a pressing sleeve. The base is a hollow member, and the top seat is sleeved in the base; the spring is sleeved between the outer peripheral surface of the top seat and the inner peripheral surface of the base; the spline seat is arranged above the spring and can move axially between the outer peripheral surface of the top seat and the inner peripheral surface of the base through the spring; the pressing sleeve is arranged on the end surface of the base away from the top seat, and the pressing sleeve limits the axial movement of the spline seat.

[0006] Preferably, a limiting block is provided on the outer peripheral surface of the spline seat, and a limiting groove is provided on the inner peripheral surface of the base. The limiting block is located in the limiting groove to limit the circumferential movement of the spline seat in the base.

[0007] Preferably, the base includes an upper base cylinder, a lower base cylinder, and a base limiting boss. The upper base cylinder is provided at the top end of the lower base cylinder, and the center lines of the upper base cylinder and the lower base cylinder coincide. The base limiting boss is provided on the inner peripheral surface of the end of the lower base cylinder away from the upper base cylinder.

[0008] Preferably, the top seat includes a main top seat cylinder and a top seat limiting boss. The top seat limiting boss is provided on the outer peripheral surface of the bottom end of the main top seat cylinder. The top seat is located in the lower base cylinder, and the bottom surface of the top seat limiting boss abuts against the top surface of the base limiting boss to limit the top seat.

[0009] Preferably, the spline seat includes a main spline seat cylinder and a spline seat top end face seat. The spline seat top end face seat is provided at the top end of the main spline seat cylinder. Spline teeth are provided on the upper surface of the spline seat top end face seat. The spline seat top end face seat is provided in the upper base cylinder. The main spline seat cylinder is sleeved between the outer peripheral surface of the main top seat cylinder and the inner peripheral surface of the lower base cylinder. The spring is sleeved between the outer peripheral surface of the main top seat cylinder and the inner peripheral surface of the lower base cylinder, and the two ends of the spring respectively abut against the bottom surface of the main spline seat cylinder and the top surface of the top seat limiting boss.

[0010] Preferably, the pressing sleeve includes a pressing sleeve body and a pressing sleeve limiting boss. The pressing sleeve limiting boss is provided on the inner surface of the pressing sleeve body to limit the spline seat top end face seat.

[0011] Preferably, the pressing sleeve body is fixedly connected to the top end surface of the upper base cylinder, and the pressing sleeve limiting boss is in close contact with the inner surface of the upper base cylinder.

[0012] Preferably, a pressing sleeve body connection hole is provided on the pressing sleeve body, a base connection hole is provided on the top end surface of the upper base cylinder. The pressing sleeve body connection hole and the base connection hole are aligned, and a connecting piece is provided between them.

[0013] As described above, the novel elastic anti-compression damage end face tooth spline seat involved in the present invention has the following beneficial effects:

[0014] 1. The split structure is adopted in the present utility model. The spline seat meshes with the spline teeth on the end face of the outer star wheel, driving the rotation of the outer star wheel. Then, the outer star wheel drives the rotation of the inner star wheel, realizing the spline rolling between the spline teeth on the end face of the inner star wheel and the spline teeth on the solid shaft. By adopting the split structure, the circumferential rotational force on the spline seat is separated from the axial force during pressing and secondary pressing. It ensures that the spline seat is only subjected to the spring force during pressing and secondary pressing, avoiding damage to the spline teeth on the end face of the outer star wheel caused by the press force.

[0015] 2. The split design is adopted in the present utility model, with a simple structure, easy-to-process parts, and low cost. The design in this application can be used in the same usage scenarios, with a wide range of applications.

[0016] 3. During the process of pressing and secondary pressing in the present utility model, the pressure is directly applied to the handle part of the outer star wheel through the axial movement of the top seat, avoiding the way of applying pressure to the outer star wheel through the spline seat in the prior art, and then transmitting the pressure through the outer star wheel to realize the pressure applied by the inner star wheel to the solid shaft, which can effectively avoid the spline seat from being subjected to bending moment force.

[0017] 4. In the present utility model, the circumferential limit of the spline seat is realized between the spline seat and the base through the limit block and the limit groove, effectively reducing the use of keys and the number of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an exploded view of the novel elastic anti-crushing end face tooth spline seat related to the present utility model;

[0019] Figure 2 is a spatial view of the pressure sleeve in the novel elastic anti-crushing end face tooth spline seat related to the present utility model;

[0020] Figure 3 is a spatial view of the spline seat in the novel elastic anti-crushing end face tooth spline seat related to the present utility model;

[0021] Figure 4 is a spatial view of the base in the novel elastic anti-crushing end face tooth spline seat related to the present utility model;

[0022] Figure 5 is a spatial view of the top seat in the novel elastic anti-crushing end face tooth spline seat related to the present utility model;

[0023] Figure 6 is a structural view of the planetary gear connected to the novel elastic anti-crushing end face tooth spline seat related to the present utility model;

[0024] Figure 7 is a sectional view of the connection between the novel elastic anti-crushing end face tooth spline seat and the outer star wheel related to the present utility model;

[0025] Figure 8 This is a schematic diagram of the process of pressing the fixed section into the novel elastic anti-pressure injury end face spline seat involved in the present utility model.

[0026] Description of the reference numerals in the drawings:

[0027] 1. Pressing sleeve; 101. Pressing sleeve main body; 1011. Connecting hole of the pressing sleeve main body; 102. Pressing sleeve limiting boss; 2. Connecting piece; 3. Base; 301. Lower cylinder of the base; 302. Upper cylinder of the base; 3021. Limiting groove; 3022. Connecting hole of the base; 303. Base limiting boss; 4. Spline seat; 401. Main cylinder of the spline seat; 402. Top end face seat of the spline seat; 4021. Limiting block; 4022. Spline teeth; 5. Spring; 6. Top seat; 601. Main cylinder of the top seat; 602. Top seat limiting boss; 7. Outer star wheel; 701. Shank of the outer star wheel; 702. End face spline teeth. Specific embodiments

[0028] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0029] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have any technical substance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and are not used to limit the scope for the implementation of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present utility model.

[0030] As Figures 1-8 shown, the present utility model provides a novel elastic anti-pressure injury end face spline seat, including a base 3, a spring 5, a top seat 6, a spline seat 4, and a pressing sleeve 1. The base 3 is a hollow member, and the top seat 6 is sleeved in the base 3; the spring 5 is sleeved between the outer peripheral surface of the top seat 6 and the inner peripheral surface of the base 3; the spline seat 4 is arranged above the spring 5 and can move axially between the outer peripheral surface of the top seat 6 and the inner peripheral surface of the base 3 through the spring 5; the pressing sleeve 1 is arranged on the top end surface of the base 3, and the pressing sleeve 1 limits the axial movement of the spline seat 4.

[0031] The novel elastic anti - crushing end - face spline seat involved in the utility model has a top seat 6, a spring 5, and a spline seat 4 all arranged in a base 3. When it is necessary to broach splines between the inner star wheel and the solid shaft, the end - face spline teeth 702 of the outer star wheel 7 mesh with the spline teeth 4022 on the spline seat 4. Then, the rotation of the base 3 drives the rotation of the spline seat 4, which in turn drives the rotation of the outer star wheel 7, and then realizes the broaching of splines between the inner star wheel and the solid shaft. When the inner star wheel and the solid shaft are pressed in and re - pressed in, the pressing - in assembly applies a force to the base 3. When the spline teeth 4022 of the spline seat 4 contact the end - face spline teeth 702 of the outer star wheel 7, the spring 5 will be compressed. At the same time, the base 3 continuously rises until the top seat 6 in the base 3 abuts against the handle part 701 of the outer star wheel, and the handle part 701 of the outer star wheel bears the pressing - in force, avoiding continuous application of pressure after the spline teeth 4022 of the spline seat 4 contact the end - face spline teeth 702 of the outer star wheel 7 and damaging the end - face spline teeth 702 of the outer star wheel 7.

[0032] Preferably, as Figure 3 、 Figure 4 shown, a limiting block 4021 is arranged on the outer peripheral surface of the spline seat 4, and a limiting groove 3021 is opened on the inner peripheral surface of the base 3. The limiting block 4021 is located in the limiting groove 3021 to limit the circumferential movement of the spline seat 4 in the base 3. In this embodiment, the spline seat 4 only has axial movement in the base 3, and the rotation of the spline seat 4 is driven by the rotation of the base 3.

[0033] Preferably, as Figure 4 、 Figure 7 shown, the base 3 includes a base upper cylinder 302, a base lower cylinder 301, and a base limiting boss 303. The base upper cylinder 302 is arranged at the top end of the base lower cylinder 301, and the center lines of the base upper cylinder 302 and the base lower cylinder 301 coincide; the base limiting boss 303 is arranged on the inner peripheral surface of the bottom end of the base lower cylinder 301. In this embodiment, the base upper cylinder 302, the base lower cylinder 301, and the base limiting boss 303 are an integral part. The diameter of the base upper cylinder 302 is larger than the diameter of the base lower cylinder 301. The base 3 is an interface part and a connecting matrix of the device, used for connecting the standard device interface and connecting each component in the whole novel elastic anti - crushing end - face spline seat.

[0034] Preferably, as Figure 5 、 Figure 7As shown, the top seat 6 includes a main top-seat cylinder 601 and a top-seat limiting boss 602. The top-seat limiting boss 602 is provided on the outer peripheral surface at the bottom end of the main top-seat cylinder 601. When the top seat 6 is sleeved in the base 3, the top seat 6 is located in the lower cylinder 301 of the base, and the bottom surface of the top-seat limiting boss 602 abuts against the top surface of the base limiting boss 303 to limit the top seat 6. In this embodiment, the main top-seat cylinder 601 and the top-seat limiting boss 602 are integrally formed. The top seat 6 is in hard contact with the handle 701 of the outer planet gear during the first press-in and the second press-in, and is the force-bearing carrier for the first press-in and the second press-in.

[0035] Furthermore, a press-in assembly and a rotation assembly are also provided on the lower side of the base 3. The press-in assembly provides pressure to implement the first press-in and the second press-in processes, and the rotation assembly provides a rotational force to implement the spline rolling process. The rotation assembly is in transmission connection with the base 3 and is used to drive the base 3 to rotate, and then drive the spline seat 4 to rotate through the limit block 4021 and the limit groove 3021. The press-in assembly applies pressure to the base 3. Then, when the spline teeth 4022 on the spline seat 4 come into contact with the end-face spline teeth 702 of the outer planet gear 7, the spline seat 4 compresses the spring 5 to prevent the spline seat 4 from applying pressure to the end-face spline teeth 702 of the outer planet gear 7 until the top seat 6 in the base 3 comes into contact with the handle 701 of the outer planet gear, so that the handle 701 of the outer planet gear bears the press-in force. That is, in the process of spline rolling → first press-in → reverse pull → second press-in, the spline seat 4 only provides the rotational force for spline rolling. During the first press-in and the second press-in, the spline seat 4 will compress the spring 5 and receive the reaction force of the spring 5 to prevent the spline teeth 4022 on the spline seat 4 from applying excessive pressure to the end-face spline teeth 702 of the outer planet gear 7. The rotation assembly uses a rotary cylinder, and the press-in assembly uses a servo motor. Using a servo motor can accurately control the magnitude of the press-in force. The rotation assembly and the press-in assembly are both prior arts and will not be repeated here.

[0036] Preferably, as Figures 3-5 、 Figure 7As shown, the spline seat 4 includes a main spline seat cylinder 401 and a top end face seat 402 of the spline seat. The top end face seat 402 of the spline seat is provided at the top end of the main spline seat cylinder 401, and spline teeth 4022 are provided on the upper surface of the top end face seat 402 of the spline seat; the top end face seat 402 of the spline seat is arranged in the upper cylinder body 302 of the base; the main spline seat cylinder 401 is sleeved between the outer peripheral surface of the main top seat cylinder 601 and the inner peripheral surface of the lower cylinder body 301 of the base. The spring 5 is sleeved between the outer peripheral surface of the main top seat cylinder 601 and the inner peripheral surface of the lower cylinder body 301 of the base, and the two ends of the spring 5 are respectively abutted against the bottom surface of the main spline seat cylinder 401 and the top surface of the top seat limiting boss 602. In this embodiment, the main spline seat cylinder 401 and the top end face seat 402 of the spline seat are integral parts. The diameter of the main spline seat cylinder 401 is smaller than the diameter of the top end face seat 402 of the spline seat, and the center lines of the main spline seat cylinder 401 and the top end face seat 402 of the spline seat coincide.

[0037] Preferably, as Figure 2 , Figure 7 shown, the pressure sleeve 1 includes a pressure sleeve main body 101 and a pressure sleeve limiting boss 102. The pressure sleeve limiting boss 102 is arranged on the inner surface of the pressure sleeve main body 101 and extends downward to limit the top end face seat 402 of the spline seat. Further, the pressure sleeve main body 101 is fixedly connected to the top end face of the upper cylinder body 302 of the base, and the pressure sleeve limiting boss 102 is in close contact with the inner surface of the upper cylinder body 302 of the base. The pressure sleeve main body 101 is used for cooperating and connecting with the base 3, and the inner diameter of the pressure sleeve main body 101 is used for axially guiding the outer star wheel 7.

[0038] Preferably, as Figure 1 , Figure 2 , Figure 4 , Figure 7 shown, a pressure sleeve main body connection hole 1011 is vertically penetrated through the pressure sleeve main body 101. A base connection hole 3022 is opened on the top end face of the upper cylinder body 302 of the base. The pressure sleeve main body connection hole 1011 and the base connection hole 3022 are aligned, and a connecting piece 2 is arranged between the two. In this embodiment, the connecting piece 2 adopts a bolt. The number of the pressure sleeve main body connection holes 1011, the base connection holes 3022, and the connecting pieces 2 is four. In other embodiments, the number of the pressure sleeve main body connection holes 1011, the base connection holes 3022, and the connecting pieces 2 can also be other numbers.

[0039] Further, in this embodiment, the above-mentioned cylinder parts are all hollow parts. The outer star wheel 7 is in transmission connection with the hub through end face spline teeth 702.

[0040] The novel elastic anti-crushing end face tooth spline seat involved in the present utility model has the following working steps:

[0041] S1: The operator depends on the attachment Figures 1-8, and according to the descriptions of the above-mentioned various components, produce, manufacture and install the above-mentioned various components;

[0042] S2: Carry out the process of broaching splines on the fixed section and the solid shaft;

[0043] S2.1: Place the outer star wheel 7 of the fixed section on the new type of elastic anti-pressure injury end face tooth spline seat. Insert the handle part 701 of the outer star wheel into the main cylinder body 401 of the spline seat. The end face spline teeth 702 of the outer star wheel 7 are engaged with the spline teeth 4022 on the spline seat 4;

[0044] S2.2: Start the rotating assembly on the lower side of the base 3. The rotating assembly drives the base 3 to rotate. The base 3 drives the spline seat 4 to rotate through the limit block 4021 and the limit groove 3021. In this way, the spline seat 4 drives the outer star wheel 7 to rotate through the engagement of the spline teeth 4022, and then the outer star wheel 7 drives the inner star wheel to rotate, realizing the spline alignment between the inner star wheel and the solid shaft;

[0045] S3: Carry out the process of pressing in the fixed section and the solid shaft;

[0046] S3.1: Start the pressing-in assembly on the lower side of the base 3. The pressing-in assembly drives the base 3 to rise, and then the top seat 6, the spline seat 4, and the pressing sleeve 1 in the base 3 all move upward. Since the spline teeth 4022 of the spline seat 4 and the end face spline teeth 702 of the outer star wheel 7 are always in an engaged state, the spline seat 4 does not move and the spring 5 is compressed. When the base 3 continues to move upward and the top surface of the top seat 6 abuts against the bottom end of the handle part 701 of the outer star wheel, the handle part 701 of the outer star wheel is subjected to an upward pressure, and then the outer star wheel 7 drives the inner star wheel to apply pressure to the solid shaft, realizing the pressing-in of the inner star wheel and the solid shaft;

[0047] S4: Implement the reverse pulling process;

[0048] S4.1: Reverse-start the pressing-in assembly on the lower side of the base 3. The pressing-in assembly moves downward, and the base 3 follows the pressing-in assembly to move downward. The spring 5 extends and resets from the compressed state. At this time, the position of the spline seat 4 remains unchanged, and the spline teeth 4022 of the spline seat 4 and the end face spline teeth 702 of the outer star wheel 7 are still in an engaged state. When the spring 5 is reset, the base 3 still moves downward. At this time, the pressing sleeve limit boss 102 will move downward and abut against the spline seat 4, and then drive the spline seat 4 to move downward. The spline teeth 4022 of the spline seat 4 are separated from the end face spline teeth 702 of the outer star wheel 7. At this time, the rotating assembly resets;

[0049] S4.2: Observe whether the inner star wheel and the solid shaft are disengaged, and judge whether the pressing-in process in step S3 is effective, that is, judge whether the pressing-in of the inner star wheel and the solid shaft is qualified;

[0050] S5: Implement the process of secondary pressing-in;

[0051] S5.1: Restart the pressing component on the lower side of the base 3. The pressing component drives the base 3 to rise, and then the top seat 6, spline seat 4, and pressing sleeve 1 in the base 3 all move upward. Since the rotating component was reset in step S4.1, it is possible that the spline teeth 4022 of the spline seat 4 and the end face spline teeth 702 of the outer star wheel 7 are in tooth contact at the tooth tips. When the spline teeth 4022 of the spline seat 4 abut against the end face spline teeth 702 of the outer star wheel 7, as the base 3 continues to rise, the spring 5 is compressed. The position of the spline seat 4 remains unchanged and always abuts against the end face spline teeth 702 of the outer star wheel 7, but no pressure is applied to the end face spline teeth 702 of the outer star wheel 7. Until the top seat 6 rises to abut against the bottom end of the handle 701 of the outer star wheel, the handle 701 of the outer star wheel is subjected to an upward pressure, and then the outer star wheel 7 drives the inner star wheel to apply pressure to the real axis, realizing the secondary press-fitting of the inner star wheel and the real axis.

[0052] Preferably, in this embodiment, the operator can adjust the compression amount and elastic force of the spring 5 to ensure that when the top seat 6 abuts against the handle 701 of the outer star wheel, the spring 5 is still in a compressible state.

[0053] The novel elastic anti-pressure damage end face tooth spline seat involved in the present utility model has the following beneficial effects:

[0054] 1. In the present utility model, the circumferential acting force of the spline rubbing between the inner star wheel and the real axis is applied to the outer star wheel 7 through the spline seat 4, and the axial acting forces of the press-fitting and secondary press-fitting of the inner star wheel and the real axis are applied to the outer star wheel 7 through the top seat 6. That is, the spline seat 4 only applies a rotational force during the spline rubbing process, and during the press-fitting and secondary press-fitting processes, the spline seat 4 only receives the elastic force of the spring 5, thereby effectively avoiding damage to the end face spline teeth 702 of the outer star wheel 7 caused by the press force of the press.

[0055] 2. In the present utility model, the circumferential limit between the spline seat 4 and the base 3 is carried out through the limit block 4021 and the limit groove 3021, reducing the use of keys and the number of parts.

[0056] 3. The present utility model adopts a split design, with a simple structure, easy processing of parts, and low cost. The design in this application can be used in similar scenarios, and the scope of application is wide.

[0057] 4. In the process of press-fitting and secondary press-fitting in the present utility model, the pressure is applied to the handle 701 of the outer star wheel by the top seat 6, which can effectively avoid the bending moment force generated by applying pressure to the outer star wheel 7 through the spline seat 4 in the prior art.

[0058] In summary, the present utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0059] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A novel elastic anti-pressure injury end-face spline seat, characterized in that: It includes a base (3), a spring (5), a top seat (6), a spline seat (4), and a compression sleeve (1). The base (3) is a hollow part, and the top seat (6) is sleeved in the base (3); the spring (5) is sleeved between the outer peripheral surface of the top seat (6) and the inner peripheral surface of the base (3); the spline seat (4) is arranged on the upper side of the spring (5) and can move axially between the outer peripheral surface of the top seat (6) and the inner peripheral surface of the base (3) through the spring (5); the compression sleeve (1) is arranged on the end face of the base (3) away from the top seat (6), and the compression sleeve (1) limits the axial movement of the spline seat (4).

2. The novel elastic anti-pressure injury end face spline seat according to claim 1, characterized in that: A limiting block (4021) is arranged on the outer peripheral surface of the spline seat (4), and a limiting groove (3021) is formed on the inner peripheral surface of the base (3). The limiting block (4021) is located in the limiting groove (3021) to limit the circumferential movement of the spline seat (4) in the base (3).

3. The novel elastic anti-pressure injury end face spline seat according to claim 1, wherein: The base (3) includes an upper base cylinder (302), a lower base cylinder (301), and a base limiting boss (303). The upper base cylinder (302) is arranged at the top end of the lower base cylinder (301), and the center lines of the upper base cylinder (302) and the lower base cylinder (301) coincide; the base limiting boss (303) is arranged on the inner peripheral surface of the end of the lower base cylinder (301) away from the upper base cylinder (302).

4. The novel elastic anti-pressure injury end-face spline seat according to claim 3, characterized in that: The top seat (6) includes a main top seat cylinder (601) and a top seat limiting boss (602). The top seat limiting boss (602) is arranged on the outer peripheral surface of the bottom end of the main top seat cylinder (601). The top seat (6) is located in the lower base cylinder (301), and the bottom surface of the top seat limiting boss (602) abuts against the top surface of the base limiting boss (303) to limit the top seat (6).

5. The novel elastic anti-pressure injury end face spline seat according to claim 4, wherein: The spline seat (4) includes a main spline seat cylinder (401) and a top end face seat of the spline seat (4). The top end face seat of the spline seat (4) is arranged at the top end of the main spline seat cylinder (401), and spline teeth (4022) are arranged on the upper surface of the top end face seat of the spline seat (4); the top end face seat of the spline seat (4) is arranged in the upper base cylinder (302); the main spline seat cylinder (401) is sleeved between the outer peripheral surface of the main top seat cylinder (601) and the inner peripheral surface of the lower base cylinder (301), the spring (5) is sleeved between the outer peripheral surface of the main top seat cylinder (601) and the inner peripheral surface of the lower base cylinder (301), and the two ends of the spring (5) respectively abut against the bottom surface of the main spline seat cylinder (401) and the top surface of the top seat limiting boss (602).

6. The novel elastic anti-pressure injury end face spline seat according to claim 4, characterized in that: The compression sleeve (1) includes a compression sleeve body (101) and a compression sleeve limiting boss (102). The compression sleeve limiting boss (102) is arranged on the inner surface of the compression sleeve body (101) to limit the top end face seat of the spline seat (4).

7. The novel elastic anti-pressure injury end face spline seat according to claim 6, characterized in that: The compression sleeve body (101) is fixedly connected to the top end face of the upper base cylinder (302), and the compression sleeve limiting boss (102) is in close contact with the inner surface of the upper base cylinder (302).

8. The novel elastic anti-pressure-injury end-face spline seat according to claim 7, wherein: A bushing body connection hole (1011) is provided on the bushing body (101), and a base connection hole (3022) is provided on the top surface of the upper cylinder body (302) of the base. The bushing body connection hole (1011) and the base connection hole (3022) are aligned, and a connecting member (2) is provided between them.

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