Coupler elastic cushion and connecting structure thereof

Abstract

A motor is connected with the elastic cushion, an elastic column is arranged in the middle of the elastic cushion, a plurality of annular protruding blocks are connected to the periphery of the elastic cushion, one side of each annular protruding block is a first arc edge, the other side of each first arc edge is a second arc edge, an inner groove is formed between the elastic cushion and the elastic column, and the elastic cushion and the elastic column are of an integrated structure. The two sides of each annular protruding block are provided with protruding strips, the section of each protruding strip is an arc face, a connecting groove is formed between the annular protruding blocks, the connecting groove is in a horn shape, a plurality of positioning blocks are arranged on the periphery of the concave hole, the positioning blocks are embedded into the connecting groove, the bottom of the inner groove is a third arc edge, and the depth of the inner groove can be set. In addition, abnormal sound cannot be made in the deformation process, the structure is stable, and deformation is not prone to occurring.

Description

TECHNICAL FIELD

[0001] The utility model relates to steering system component technical field especially coupling elastic pad and connecting structure thereof. BACKGROUND

[0002] The coupling elastic pad is a complex and important field, and is installed between an EPS motor and a worm, and due to the gradually increasing requirement of the whole vehicle on NVH, the coupling elastic pad mainly needs to reduce the gap with the coupling and prevent abnormal sound generated by axial movement of the worm during steering. Since some motors on the market need to bear a certain axial force, a structure of adding a spring in the middle of the coupling elastic pad appears, and the design can change the axial force by selecting different types of springs, but the spring may generate abnormal sound during work. Based on this, the design appears, and since the whole structure is made of rubber material, mechanical vibration can be effectively absorbed and reduced, noise can be reduced, and the motor can be protected from damage.

[0003] In the prior art, a coupling elastic pad and a connecting structure for a worm motor are disclosed in patent publication No. CN214248065U, the coupling elastic pad is made of soft material as a whole, and at least includes a base ring, the base ring is provided with a mounting hole, the inner wall of the mounting hole is provided with a plurality of inner fixing grooves extending along the axial direction of the mounting hole and uniformly distributed in the circumferential direction, and the outer circumferential wall of the base ring is provided with a plurality of outer fixing protrusions extending along the axial direction of the mounting hole and uniformly distributed in the circumferential direction. The coupling elastic pad can be connected between the spline couplings, and has a buffering effect, effectively reducing the wear and abnormal sound of the couplings. The utility model also provides a connecting structure for a worm motor, which at least includes an outer spline coupling, an inner spline coupling and a coupling elastic pad, the coupling elastic pad wraps the outer circumferential surface of the inner spline coupling, and the coupling elastic pad is installed in the outer spline coupling. The elastic pad of the comparative technology has an unstable overall structure, and is prone to deformation after long-term use. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the problem that the elastic pad in the prior art has a spring in the middle, the spring is a metal part, and abnormal sound may occur during use, while the rubber itself does not emit abnormal sound during deformation, so that the risk can be effectively avoided, and a coupling elastic pad with silence is provided.

[0005] Another purpose of the utility model is to solve the problem that the existing elastic pad is designed in a split type, the elastic pad of the utility model has a metal spring or cylindrical rubber spring in the middle, the design is of an integrated type, facilitates product installation, and provides a coupling elastic pad with convenient installation and stable structure.

[0006] The utility model discloses a further purpose is to solve the prior art when installing the claw thickness of elastic pad will not help assembly, the thickness is too small will produce the gap and lead to elastic pad life is influenced, and the technology design increases small boss on each claw and can facilitate installation, provide a kind of misregistration, and the connecting structure of elastic pad of durable coupling is not easy.

[0007] To realize the above-mentioned purpose, the utility model provides the following technical scheme: a coupling elastic pad, motor connects elastic pad, the middle of elastic pad is elastic column, and a plurality of ring bosses are connected around elastic pad, the first arc side is on the side of ring boss, the second arc side is on the other side of first arc side, the inner recess is between elastic pad and elastic column, and elastic pad and elastic column are integrated structure.

[0008] As preferred, the two sides of ring boss are convex strips, and the cross section of convex strip is circular arc surface.

[0009] As preferred, the connection groove between ring boss is trumpet-shaped.

[0010] As preferred, a plurality of positioning blocks are arranged around the recess, and the positioning block is embedded into the connection groove.

[0011] As preferred, the bottom of inner recess is third arc side, and the depth of inner recess can be set.

[0012] A coupling elastic pad connecting structure includes a coupling elastic pad, the connecting disc is at the connection between motor and elastic pad, and the recess is arranged in the center of connecting disc.

[0013] As preferred, the positioning block fixes ring boss, and the convex strip on ring boss is close to positioning block.

[0014] As preferred, a plurality of convex strips can be arranged, and the convex strip is elastic member.

[0015] As preferred, the positioning block is fan-shaped structure, and the positioning block is non-elastic member.

[0016] As preferred, the inner arc side is on the side of positioning block towards connection groove, and the outer arc side is on the outer side of positioning block.

[0017] Compared with the prior art, the utility model has the beneficial effects that: the utility model adds the structure of metal spring or cylindrical rubber spring in the middle of elastic pad, the utility model is integrated design, facilitates product installation, effectively reduces time and cost, and does not emit abnormal sound in the deformation process, the utility model is used for buffering between motor coupling and worm coupling, the claw thickness of elastic pad will not help assembly when installing, the thickness is too small will produce the gap and lead to elastic pad life is influenced, the small boss is increased on each claw, which facilitates installation, and the function is met. DRAWINGS

[0018] Figure 1The utility model discloses an elastic pad schematic view.

[0019] Figure 2 The utility model discloses an elastic pad plan view.

[0020] Figure 3 The utility model discloses an elastic pad section view A-A.

[0021] Figure 4 The utility model discloses an elastic pad and motor cooperation schematic view.

[0022] Figure 5 The utility model discloses a partial enlarged view C.

[0023] Figure 6 The utility model discloses an elastic pad and motor cooperation plan view.

[0024] Figure 7 The utility model discloses an elastic pad and motor cooperation section view B-B.

[0025] In the figure: 1, elastic pad, 2, ring boss, 3, first arc edge, 4, second arc edge, 5, convex strip, 6, connecting groove, 7, elastic column, 8, inner recess, 9, circular arc surface, 10, third arc edge, 11, positioning block, 12, connecting disc, 13, inner arc edge, 14, outer arc edge, 15, motor, 16, recess hole. DETAILED DESCRIPTION

[0026] The utility model discloses a technical scheme is further specifically described below through specific embodiment and combining with the drawing, and the described embodiment is only a part of the utility model embodiment, but is not all the embodiment.

[0027] The utility model discloses a technical scheme: the utility model is designed to solve the failure problem that elastic pad 1 can appear when experiencing extreme deformation. The structure of the metal spring or cylindrical rubber spring in the elastic pad, when the deformation of elastic pad 1 exceeds its elastic range, that is, exceeds the limit of the material to restore the original state, plastic deformation can occur, resulting in elastic pad 1 cannot restore and eventually fail. In order to avoid this risk, the design reduces the connecting area of the middle part of elastic pad 1 and the body through inner recess 8, indirectly increases the free length of the middle of elastic pad 1. This ingenious design allows the compression ratio of elastic pad 1 to be controlled by adjusting the depth of inner recess 8, thereby effectively preventing permanent deformation of elastic pad 1.

[0028] The connection between the elastic pad 1 and the elastic column 7 uses a rubber layer, forming a flexible connection structure. This design not only simplifies the installation and removal process of the elastic pad 1, but also improves its buffering and damping performance. In actual work, the rubber part of the elastic column 7 will undergo elastic deformation, generating an axial force that can be transmitted to the motor and worm. By adjusting the diameter of the elastic column 7 part, the size of the generated axial force can be changed to adapt to different working requirements. If a larger axial force is needed, the diameter of the elastic column 7 can be increased; if a smaller axial force is needed, the diameter of the elastic column 7 can be reduced. Rubber is widely used in the manufacture of elastic pads 1 due to its excellent elastic properties, but when its compression ratio exceeds 30%, the rubber is prone to permanent deformation, causing the elastic pad to fail. To overcome this challenge, the design adds an inner groove 8 to the elastic pad 1. When the compression amount is too large and may cause permanent deformation of the rubber, the depth of the inner groove 8 can be increased to reduce the compression ratio, thereby preventing permanent deformation of the elastic pad 1. This design significantly improves the service life of the elastic pad 1 and enhances its adaptability and reliability in varying working conditions. The utility model solves the problem of permanent deformation of the elastic pad 1 under high compression ratio, and also flexibly controls the size of the axial force by adjusting the depth of the inner groove 8.

[0029] Example 1: Reference Figures 1 to 7 The elastic pad 1 is connected to the motor 15 and plays an important role in transmitting torque and buffering vibration between the motor 15 and the coupling. The elastic pad 1 is designed with an elastic column 7 in the center, which provides the necessary elasticity and strength, and also ensures the stability and reliability of the coupling during operation. The elastic pad 1 is evenly distributed with several ring blocks 2 around it, which enhance the structural strength of the elastic pad 1 and improve the connection stability with other parts of the coupling. Each ring block 2 has two different arc edges, one side is the first arc edge 3 and the other side is the second arc edge 4. This design allows the ring block 2 to better adapt to different connection requirements and provide better sealing performance during connection.

[0030] A concave groove 8 is designed between the elastic pad 1 and the elastic column 7, which increases the flexibility of the elastic pad 1 and helps to reduce the use of materials, thereby reducing the weight of the entire coupling. The elastic pad 1 and the elastic column 7 are of an integral structure, which can ensure the stability and durability of the structure during high-load operation. The two sides of the ring block 2 are also designed with protrusions 5, and the cross section of the protrusions 5 is a circular arc surface 9, which can increase the contact area between the ring block 2 and other parts of the coupling, and improve the tightness and stability of the connection. The connecting grooves 6 are designed between the ring blocks 2, which are trumpet-shaped, which can provide better guidance during connection and ensure that each part can be accurately connected. A plurality of positioning blocks 11 are designed around the concave hole 16, which can be embedded in the connecting groove 6. Such design can ensure that each part can be accurately positioned during connection, and improve the assembly accuracy and operation efficiency of the entire coupling. The structure of the utility model considers torque transmission, shock absorption, structural stability and durability, which makes it suitable for various industrial application scenarios and can maintain performance and reliability under different working conditions.

[0031] Embodiment 2: refer to Figures 1 to 7 , the elastic pad and the connecting structure of the coupling, the elastic column 7 is arranged at the center position of the elastic pad 1, which is a core component that gives the elastic pad the necessary elasticity and carrying capacity, and at the same time guarantees the smoothness and reliability of the coupling operation. The ring blocks 2 are evenly arranged at the edge of the elastic pad 1, which not only improves the structural rigidity of the elastic pad, but also enhances the connection stability with other parts of the coupling. The two sides of the ring block 2 are respectively provided with the first arc edge 3 and the second arc edge 4, which makes the ring block 2 adapt to diversified connection requirements and provide better sealing effect during connection.

[0032] The inner groove 8 between the elastic pad 1 and the elastic column 7 not only improves the flexibility of the elastic pad, but also reduces the overall weight of the coupling by reducing the amount of material used. The elastic pad 1 and the elastic column 7 are designed as a whole, that is, they are manufactured in one piece, which helps to maintain the stability and durability of the structure when under heavy load. The protrusions 5 on both sides of the ring block 2 are designed as circular arcs 9, which increase the contact area with other components of the coupling, thereby improving the tightness and stability of the connection. The connecting groove 6 is located between the ring blocks 2, and its trumpet-shaped design facilitates precise guidance during assembly connection, ensuring that the components can be accurately docked. Around the recess 16, a plurality of positioning blocks 11 are provided, which can be embedded in the connecting groove 6. The design of the inner groove 8 and the connection between the motor 15 and the elastic pad 1. The design of the inner groove 8 is particularly important, as it not only relates to the structural strength and durability of the elastic pad 1, but also directly affects its performance adjustment. The third arc edge 10 at the bottom of the inner groove 8 helps to disperse stress and reduce stress concentration points, thereby improving the overall stability of the elastic pad 1. The depth of the inner groove 8 can be adjusted, which allows engineers to adjust the performance of the elastic pad 1 according to specific application requirements and working conditions to adapt to different industrial environments. When greater elasticity and cushioning capacity are required, the depth of the inner groove 8 can be increased to provide more deformation space, while in cases where space is limited or a compact structure is required, the depth of the inner groove 8 can be reduced to optimize the design.

[0033] The connection between the motor 15 and the elastic pad 1 is designed as a connecting disc 12, which provides a stable connection interface that is crucial for transmitting torque and reducing vibration. The recess 16 in the center of the connecting disc 12 not only reduces the weight of the connecting disc, which is very useful during installation and alignment, and can improve the overall assembly accuracy. The recess 16 can also be inserted with a positioning pin or other fixing member to enhance the stability and reliability of the connection, ensuring that the connection between the motor 15 and the elastic pad 1 is firm and reducing potential failures caused by vibration or torque transmission.

[0034] Example 3: Reference Figures 1 to 7, coupling elastic pad and its connecting structure, the coupling elastic pad structure includes an elastic pad 1 connected to the motor 15, which plays a dual role of power transmission and shock absorption between the motor 15 and the coupling. The elastic pad 1 is equipped with an elastic column 7 in the center, which not only provides the required elasticity and strength, but also ensures the stability and reliability of the coupling during operation. The elastic pad 1 is evenly distributed with ring bumps 2 on the edge, which enhances the structural strength of the elastic pad and improves the stability of the connection with other components of the coupling. The ring bumps 2 are respectively provided with a first arc edge 3 and a second arc edge 4 on both sides, which makes the ring bumps 2 meet the diversified connection requirements and provide better sealing during connection. The inner groove 8 between the elastic pad 1 and the elastic column 7 enhances the flexibility of the elastic pad and reduces the use of materials, effectively reducing the weight of the coupling. The elastic pad 1 and the elastic column 7 adopt an integrated design, that is, they are manufactured at one time, which helps to maintain the stability and durability of the structure under high load. The convex strip 5 on both sides of the ring bump 2 has a circular arc cross section 9, which increases the contact area with other components of the coupling, improving the tightness and stability of the connection.

[0035] The connecting groove 6 between the ring bumps 2 is designed in a trumpet shape, which helps to provide accurate guidance during assembly connection and ensures that the components can be accurately docked. The positioning blocks 11 around the recess hole 16 can be embedded in the connecting groove 6, ensuring that the components can be accurately aligned during connection, improving the assembly precision and operation efficiency of the coupling. This coupling elastic pad structure integrates torque transmission, shock absorption, structural stability and durability, and is suitable for various industrial environments and can maintain performance and reliability under different working conditions. The design of the inner groove 8 is crucial to the stability and durability of the elastic pad 1 and has a direct impact on its performance adjustment. The third arc edge 10 at the bottom of the inner groove 8 helps to disperse stress, reduce stress concentration, and enhance the overall stability of the elastic pad 1. The depth of the inner groove 8 can be adjusted as needed, providing engineers with the ability to adjust the performance of the elastic pad 1 according to specific application requirements and working conditions, so that it can adapt to changing industrial application environments. When stronger elasticity and buffering performance are required, the deformation range can be expanded by increasing the depth of the inner groove 8; while in space-limited or compact structure pursuit, reducing the depth of the inner groove 8 can achieve design optimization.

[0036] The engagement of the motor 15 with the elastic pad 1 is also a key innovation of this embodiment. The motor 15 is engaged with the elastic pad 1 through the connecting disc 12, forming a stable connection interface, which is crucial for effective torque transmission and vibration reduction. The recessed hole 16 in the center of the connecting disc 12 not only reduces the weight of the connecting disc, but also provides a precise positioning reference, which is crucial for installation and alignment processes, significantly improving the accuracy of assembly. The recessed hole 16 can also be fitted with a positioning pin or other fasteners, enhancing the stability and reliability of the connection, ensuring that the connection between the motor 15 and the elastic pad 1 is more secure, reducing the risk of potential failure caused by vibration or torque transmission. This design not only improves the performance of the elastic pad structure of the shaft coupling, but also makes it easier to maintain and replace the elastic pad 1, reducing maintenance costs and improving work efficiency.

[0037] The close fit between the protrusions 5 and the positioning blocks 11 is one of the key designs in the elastic pad structure of the shaft coupling. The protrusions 5 are tightly attached to the positioning blocks 11, which not only enhances the structural rigidity of the elastic pad 1, but also helps maintain precise alignment during connection, ensuring that the elastic pad 1 fits more tightly and stably with other components of the shaft coupling. The fan-shaped design of the positioning blocks 11 not only provides additional support, but also allows the elastic pad 1 to be more stably positioned in the connection groove 6, which helps to evenly distribute the pressure from the protrusions 5 and reduce local stress concentration, thereby improving the durability and reliability of the entire elastic pad structure.

[0038] The design details of the positioning blocks 11 are further described in relation to the elastic pad structure of the shaft coupling. The side of the positioning blocks 11 facing the connection groove 6 is designed as an inner arc edge 13, while the outer side is designed as an outer arc edge 14. This design allows the positioning blocks 11 to perfectly match the trumpet shape of the connection groove 6, providing better guidance and positioning functions. The inner arc edge 13 helps the positioning blocks 11 tightly fit the inner wall of the connection groove 6, while the outer arc edge 14 ensures sufficient clearance with the outer wall of the connection groove 6, avoiding excessive interference. This design improves the precision of the elastic pad 1 and other components of the shaft coupling, reducing friction and wear during installation, making the installation and removal of the elastic pad 1 more smooth, reducing maintenance costs and time. The close fit of the protrusions 5 and the positioning blocks 11, as well as the design of the inner and outer arc edges of the positioning blocks 11, together ensure that the elastic pad 1 can work reliably under various working conditions, reducing maintenance requirements and prolonging service life.

[0039] For those skilled in the art, the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model.

Claims

1. A coupling elastic pad characterized by, The motor (15) is connected with the elastic pad (1), the elastic pad (1) is provided with the elastic column (7) in the middle, the elastic pad (1) is connected with a plurality of ring blocks (2) around, the ring block (2) is provided with the first arc edge (3) on one side, the first arc edge (3) is provided with the second arc edge (4) on the other side, the elastic pad (1) and the elastic column (7) are provided with the inner groove (8) between, and the elastic pad (1) and the elastic column (7) are integrated.

2. A coupling elastomeric pad according to claim 1, wherein, The ring block (2) is provided with the convex strip (5) on both sides, and the cross section of the convex strip (5) is the circular arc surface (9).

3. A coupling elastomeric pad according to claim 1 or 2, characterized in that, The ring block (2) is provided with the connecting groove (6) between, and the connecting groove (6) is trumpet-shaped.

4. A coupling grommet as defined in claim 2, wherein, The concave hole (16) is provided with a plurality of positioning blocks (11) around, and the positioning block (11) is embedded into the connecting groove (6).

5. A coupling elastomeric pad according to claim 1 or 4, wherein The inner groove (8) is provided with the third arc edge (10) at the bottom, and the depth of the inner groove (8) can be set.

6. A coupling elastic pad connection structure characterized by, The motor (15) is connected with the elastic pad (1) at the connecting disc (12), and the concave hole (16) is arranged at the center of the connecting disc (12).

7. A coupling elastic pad connection structure according to claim 6, wherein The positioning block (11) fixes the ring block (2), and the convex strip (5) on the ring block (2) is tightly attached to the positioning block (11).

8. A coupling elastic pad connection structure according to claim 6 or 7, characterized in that, The convex strip (5) can be provided with a plurality of convex strips (5), and the convex strip (5) is an elastic member.

9. A coupling elastic pad connection structure according to claim 6 or 7, characterized in that, The positioning block (11) is a fan-shaped structure, and the positioning block (11) is a non-elastic member.

10. A coupling elastic pad connection structure according to claim 6 or 7, characterized by The positioning block (11) is provided with the inner arc edge (13) on one side of the connecting groove (6), and is provided with the outer arc edge (14) on the other side.

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