Integrated change wheel and bushing structure

Abstract

The utility model discloses an integrated change wheel and bushing structure, which relates to the technical field of change wheel sets, and comprises a change wheel body and a bushing body, the change wheel body and the bushing body adopt an injection molding connection design to ensure the pull-out resistance after the change wheel body and the bushing body are matched, and the bushing body is directly formed in a change wheel seat body hole in an injection molding manner and is tightly attached to the change wheel seat body hole, so that the pull-out resistance of the change wheel body and the bushing body is ensured. The dimensional control precision, the form and location tolerance precision and the like are greatly improved, meanwhile, the machining time is saved, and the efficiency is improved; besides, the first groove, the second groove and the third groove in the change wheel body are matched with the first protrusion, the second protrusion and the third protrusion on the lining body, the circumferential position and the axial position of the lining body and the change wheel body are limited at the same time, the lining body is prevented from being screwed out and falling off, the connection stability is high, and the use value is high.

Description

Technical Field

[0001] The utility model relates to the technical field of speed change wheel sets, and in particular to an integrated speed change wheel and bushing structure. Background Art

[0002] During the production process of the CVT transmission wheel set, the transmission wheel and the bushing are set independently. After the transmission wheel and the bushing are formed, the bushing needs to be pressed into the transmission wheel seat hole. Figure 5 As shown, during the production process, the speed wheel seat hole and the bushing outer diameter dimensions are required to have high precision, and unstable dimensions are very likely to cause batch defects. In addition, since the bushing and the speed wheel are pressed together, the bushing may fall off due to insufficient peeling strength, seriously affecting the performance of the CVT speed wheel set. Therefore, an integrated speed wheel and bushing structure is needed. Utility Model Content

[0003] The purpose of the utility model is to solve the problems raised in the above background technology, and then propose an integrated speed change wheel and bushing structure.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] An integrated speed change wheel and bushing structure comprises a speed change wheel body and a bushing body;

[0006] The bushing body is injection molded in the seat hole of the transmission wheel body;

[0007] A plurality of grooves are arranged on the circumference of the speed change wheel body seat hole;

[0008] The shift wheel body seat hole is provided with groove 2 and groove 3 on both sides of groove 1 respectively;

[0009] The bushing body is provided with protrusions one in the circumferential direction, the number of which is the same as the number of the grooves one and is used to connect with the grooves one, so as to limit the circumferential position of the bushing body;

[0010] The bushing body is provided with protrusion 2 for accessing groove 2 and protrusion 3 for accessing groove 3 on both sides of protrusion 1, so as to limit the axial position of the bushing body and the speed change wheel body.

[0011] Furthermore, the grooves are six in number and are linearly arranged in the seat hole of the speed change wheel body to limit the circumferential positions of the bushing body and the speed change wheel body to prevent the bushing body from rotating.

[0012] Furthermore, the second groove and the third groove are in an annular structure.

[0013] Furthermore, the groove 2 and the groove 3 are symmetrically arranged with respect to the groove 1 so that the speed change wheel body is subjected to uniform force, thereby facilitating the molding operation of the speed change wheel body.

[0014] Furthermore, the second protrusion and the third protrusion are in an annular structure.

[0015] Furthermore, the second protrusion and the third protrusion are symmetrically arranged with respect to the first protrusion so that the bushing body is subjected to uniform force, thereby increasing its service life.

[0016] Furthermore, the speed change wheel body is formed by die casting.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The speed wheel body and the bushing body of the utility model adopt an injection molding connection design to ensure the anti-pull-out force after the two are matched. Since the bushing body is directly injection molded in the hole of the speed wheel seat body, the two are tightly fitted, and the accuracy of size control and shape and position tolerances are greatly improved, while saving processing time and improving efficiency; in addition, through the matching arrangement of grooves one, two and three on the speed wheel body and protrusions one, two and three on the bushing body, the circumferential position and axial position of the bushing body and the speed wheel body are limited at the same time, the bushing body is prevented from being screwed out and falling off, and the connection stability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the utility model;

[0020] Figure 2 is a cross-sectional view of a transmission wheel body;

[0021] Figure 3 is a cross-sectional view of the bushing body;

[0022] Figure 4 It is a schematic diagram of the structure of the utility model;

[0023] Figure 5 It is a schematic diagram of the structure of the speed change wheel body;

[0024] Figure 6 It is a structural schematic diagram of the bushing body;

[0025] Among them: 1. speed change wheel body; 11. groove one; 12. groove two; 13. groove three; 2. bushing body; 21. protrusion one; 22. protrusion two; 23. protrusion three. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The utility model is further described in combination with the drawings and embodiments:

[0027] See attached Figure 1 -Attached Figure 6 As shown, an integrated speed change wheel and bushing structure includes a speed change wheel body 1 and a bushing body 2;

[0028] Among them, the bushing body 2 is injection molded in the seat hole of the speed wheel body 1; during the implementation of the plan, after the speed wheel body 1 is die-cast, the bushing body 1 injection mold is placed in the seat hole of the speed wheel body 1, and then the bushing body 1 injection mold is injection molded. After the injection molding is completed, the bushing body 2 is directly formed in the speed wheel seat hole, and the two are tightly fitted, and the accuracy of size control and form and position tolerances are greatly improved, while saving processing time and improving efficiency.

[0029] Specifically, for the structure of the speed change wheel body 1:

[0030] See attached Figure 2 and attached Figure 5 As shown, a plurality of grooves 11 are linearly arranged on the circumference of the seat hole of the speed change wheel body 1, and the number of the grooves 11 is 6 to limit the circumferential position of the bushing body 2 and the speed change wheel body 1 to prevent the bushing body 2 from rotating;

[0031] A second groove 12 and a third groove 13 are respectively arranged on both sides of the groove one 11 in the seat hole of the speed wheel body 1. The second groove 12 and the third groove 13 are annular structures. The second groove 12 and the third groove 13 cooperate with each other to limit the circumferential position of the bushing body 2 and the speed wheel body 1 to prevent the bushing body 2 from being screwed out. In addition, the second groove 12 and the third groove 13 are symmetrically arranged with respect to the groove one 11 so that the speed wheel body 1 is subjected to uniform force, which facilitates the molding operation of the speed wheel body 1.

[0032] Specifically, for the structure of the bushing body 2:

[0033] See attached Figure 3 and attached Figure 6 As shown, the outer circumference of the bushing body 2 is provided with protrusions 21 which are the same in number as the grooves 11 and are used to connect with the grooves 11. After the protrusions 21 connect with the grooves 11, a mutually conflicting structure is formed, thereby limiting the rotation of the bushing body 2 in the circumferential direction.

[0034] On the bushing body 2, protrusion 22 for connecting to groove 2 12 and protrusion 3 23 for connecting to groove 3 13 are respectively arranged on both sides of protrusion 1 21. Protrusion 2 22 and protrusion 3 23 are annular structures. Protrusion 22 and protrusion 3 23 cooperate with each other to limit the axial position of the bushing body 2 and the speed change wheel body 1 to prevent the bushing body 1 from falling out. In addition, protrusion 22 and protrusion 3 23 are symmetrically arranged with respect to protrusion 1 21 so that the bushing body 2 is subjected to uniform force, thereby improving its service life.

[0035] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. An integrated speed change wheel and bushing structure, comprising a speed change wheel body (1) and a bushing body (2); characterized in that: The bushing body (2) is injection molded in the seat hole of the speed change wheel body (1); A plurality of grooves (11) are arranged on the circumference of the seat hole of the speed change wheel body (1); A second groove (12) and a third groove (13) are respectively arranged on both sides of the first groove (11) in the seat hole of the speed change wheel body (1); The bushing body (2) is provided with protrusions (21) on the outer circumference thereof, the number of which is the same as the number of the grooves (11) and which are used to engage with the grooves (11) so as to limit the circumferential position of the bushing body (2); A protrusion 2 (22) for accessing the groove 2 (12) and a protrusion 3 (23) for accessing the groove 3 (13) are respectively arranged on both sides of the protrusion 1 (21) on the bushing body (2) to limit the axial position of the bushing body (2) and the speed change wheel body (1).

2. The integrated speed change wheel and bushing structure according to claim 1, characterized in that: The number of the grooves 1 (11) is 6 and they are linearly arranged in the seat hole of the speed change wheel body (1).

3. The integrated speed change wheel and bushing structure according to claim 1, characterized in that: The groove 2 (12) and the groove 3 (13) are annular structures.

4. The integrated speed change wheel and bushing structure according to claim 1, characterized in that: The groove 2 (12) and the groove 3 (13) are symmetrically arranged with respect to the groove 1 (11).

5. The integrated speed change wheel and bushing structure according to claim 1, characterized in that: The second protrusion (22) and the third protrusion (23) are annular structures.

6. The integrated speed change wheel and bushing structure according to claim 1, characterized in that: The second protrusion (22) and the third protrusion (23) are symmetrically arranged with respect to the first protrusion (21).

7. The integrated speed change wheel and bushing structure according to claim 1, characterized in that: The speed change wheel body (1) is formed by die casting.

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