Interlocking structure

Abstract

The utility model discloses an interlocking structure, which belongs to the technical field of transmission design and comprises a first shifting fork shaft and a second shifting fork shaft, the first shifting fork shaft and the second shifting fork shaft are fixed on a gearbox shell, the other end of the first shifting fork shaft and the other end of the second shifting fork shaft are provided with a shifting fork frame, and a plurality of steel balls are arranged between the first shifting fork shaft and the second shifting fork shaft on the shifting fork frame. A traditional interlocking groove structure is replaced by the shifting fork frame with brand new design, the gearbox shifting fork shafts are installed and fixed through the shifting fork frame, the steel ball is installed in the cavity between the two shifting fork shafts, the two shifting fork shafts are matched with the steel ball to achieve interlocking in the using process, the structure is simple, parts such as an interlocking limiting pin and a spring are omitted, reliability is improved, and meanwhile cost is reduced. And the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of transmission design, and in particular relates to an interlocking structure. Background Art

[0002] As the production of pure electric vehicles continues to increase, the reliability of pure electric vehicles is also receiving more and more attention. Since the shifting of new energy transmissions is controlled by TCU, not manual transmissions, once the control command is wrong, there is a possibility of shifting into double gear.

[0003] To resolve this issue, see Figure 1 , Figure 2 The traditional solution is to reserve interlocking grooves on the upper cover or the transmission housing, and to achieve interlocking between the various fork shafts by installing steel balls and springs; interlocking slots are processed on the transmission housing, and interlocking is achieved by adding self-locking steel balls and interlocking limit pins. The sizes of the first steel ball and the second steel ball are not completely consistent, and the sizes of the first interlocking limit pin and the second interlocking limit pin are inconsistent. There is a possibility of misassembly during the assembly process in the workshop: if the first steel ball and the second steel ball are installed incorrectly, there is a possibility that the transmission will be engaged in two gears (i.e., double gear) in the case of overshoot in the gear shifting operation. At this time, the transmission is at risk of serious damage and there is a safety hazard. The interlocking between the various fork shafts is achieved by installing steel balls and springs. This solution has some problems: 1. There is a possibility of misassembly of steel balls and springs; 2. There is a problem with the service life of the springs. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide an interlocking structure to solve the technical problems in the prior art that the interlocking steel balls and springs between the fork shafts are easily misassembled and the springs have a limited service life.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An interlocking structure comprises: a first shift fork shaft and a second shift fork shaft, wherein the first shift fork shaft and the second shift fork shaft are fixed on a gearbox housing, a shift fork frame is arranged at the other end, and a plurality of steel balls are arranged between the first shift fork shaft and the second shift fork shaft on the shift fork frame.

[0007] Preferably, the fork frame is provided with a first fork shaft hole and a second fork shaft hole, and the first fork shaft hole and the second fork shaft hole respectively fix the first fork shaft and the second fork shaft.

[0008] Preferably, the inner diameter of the first shift fork shaft hole is the same as the shaft diameter of the first shift fork shaft.

[0009] Preferably, the inner diameter of the second shift fork shaft hole is the same as the shaft diameter of the second shift fork shaft.

[0010] Preferably, the fork frame is provided with a cavity for accommodating a plurality of steel balls.

[0011] Preferably, the inner diameter of the cavity is consistent with the outer diameter of the steel ball.

[0012] Preferably, a shift fork shaft ball socket adapted to fit the steel ball is provided on the first shift fork shaft.

[0013] Preferably, a shift fork shaft ball socket adapted to fit the steel ball is provided on the second shift fork shaft.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] An interlocking structure disclosed in the present application, a newly designed fork frame replaces the traditional interlocking groove structure, and the gearbox fork shaft is installed and fixed by the fork frame, and a steel ball is installed in the cavity between the two fork shafts. When in use, the two fork shafts and the steel ball cooperate with each other to achieve interlocking. The structure is relatively simple, and parts such as interlocking limit pins and springs are eliminated, which improves reliability and reduces costs.

[0016] Furthermore, the cross-sectional size of the yoke frame cavity is the same as that of the steel ball, thereby preventing the possibility of wrong installation and facilitating workshop assembly.

[0017] Furthermore, a ball socket is provided on the fork shaft, and the steel ball directly cooperates with the ball socket, eliminating the first interlocking limit pin, ensuring that the second interlocking limit pin will not be installed incorrectly or missed, and actively ensuring the consistency of workshop assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A top view of a transmission interlocking structure of the prior art;

[0019] Figure 2 It is a cross-sectional view of a transmission interlocking structure of the prior art;

[0020] Figure 3 It is a structural schematic diagram of the utility model.

[0021] Among them: 1-interlocking pin hole; 2-fork shaft interlocking pin; 3-first interlocking limit pin; 4-second interlocking limit pin; 5-fork shaft; 6-first steel ball; 7-second steel ball; 8-fork frame; 9-steel ball; 10-second fork shaft; 11-first fork shaft. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] The utility model is further described in detail below with reference to the accompanying drawings:

[0025] See also Figure 3 The present application discloses an interlocking structure, including: a first fork shaft 11 and a second fork shaft 10, the first fork shaft 11 and the second fork shaft 10 are fixed on the gearbox housing, and a fork frame 8 is provided at the other end, and a plurality of steel balls 9 are provided between the first fork shaft 11 and the second fork shaft 10 on the fork frame 8. The newly designed fork frame 8 replaces the traditional interlocking groove structure. The steel ball 10 is installed in the cavity between the two fork shafts on the fork frame 8, and a ball socket is processed at the steel ball assembly of the fork shaft to cooperate with the steel ball 9. The structure is relatively simple, and the interlocking limit pins and springs and other parts are eliminated, which improves reliability while reducing costs.

[0026] In some embodiments, the fork frame 8 is provided with a first fork shaft hole and a second fork shaft hole, and the first fork shaft hole and the second fork shaft hole are used to fix the first fork shaft 11 and the second fork shaft 10 respectively.

[0027] In some embodiments, the inner diameter of the first fork shaft hole is the same as the shaft diameter of the first fork shaft 11 .

[0028] In some embodiments, the inner diameter of the second fork shaft hole is the same as the shaft diameter of the second fork shaft 10 .

[0029] In some embodiments, the shift fork frame 8 is provided with a cavity for placing a plurality of steel balls 9. Preferably, the inner diameter of the cavity is consistent with the outer diameter of the steel ball 9. During the assembly process, the size of the cavity of the shift fork frame 8 for installing the steel ball 9 is consistent with the size of the steel ball 9, ensuring that the steel ball 9 will not be installed by mistake.

[0030] In some embodiments, a shift fork shaft ball socket adapted to the steel ball (9) is provided on the first shift fork shaft (11).

[0031] In some embodiments, a shift fork shaft ball socket adapted to the steel ball (9) is provided on the second shift fork shaft (10).

[0032] The steel ball 9 directly cooperates with the ball socket of the fork shaft, cancels the first interlocking limit pin 3, and ensures that the second interlocking limit pin 4 will not be installed incorrectly or missed, which actively ensures the consistency of workshop assembly.

[0033]

How to use

[0034] When the first shift fork shaft 11 of the gearbox moves forward and backward to shift gears, the steel ball 9 comes out of the shift fork shaft ball socket, so that the steel ball 9 presses against the second shift fork shaft 10, and the second shift fork shaft 10 cannot move forward and backward, thereby achieving interlocking; when the second shift fork shaft 10 moves forward and backward to shift gears, the steel ball 9 comes out of the shift fork shaft ball socket, so that the steel ball 9 presses against the first shift fork shaft 11, thereby achieving interlocking.

[0035] This solution is simple in structure, safe and reliable, and has been used in large quantities on 4E50 series transmissions with good results.

[0036] The above content is only for explaining the technical idea of ​​the utility model and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.

Claims

1. An interlocking structure, characterized in that: include: A first shift fork shaft (11) and a second shift fork shaft (10) are fixed on a gearbox housing, a shift fork frame (8) is provided at the other end, and a plurality of steel balls (9) are provided between the first shift fork shaft (11) and the second shift fork shaft (10) on the shift fork frame (8).

2. An interlocking structure according to claim 1, characterized in that: The fork frame (8) is provided with a first fork shaft hole and a second fork shaft hole, and the first fork shaft hole and the second fork shaft hole respectively fix the first fork shaft (11) and the second fork shaft (10).

3. An interlocking structure according to claim 2, characterized in that: The inner diameter of the first shift fork shaft hole is the same as the shaft diameter of the first shift fork shaft (11).

4. An interlocking structure according to claim 2, characterized in that: The inner diameter of the second shift fork shaft hole is the same as the shaft diameter of the second shift fork shaft (10).

5. An interlocking structure according to claim 1, characterized in that: The shift fork frame (8) is provided with a cavity for accommodating a plurality of steel balls (9).

6. An interlocking structure according to claim 5, characterized in that: The inner diameter of the cavity is consistent with the outer diameter of the steel ball (9).

7. An interlocking structure according to claim 1, characterized in that: The first shift fork shaft (11) is provided with a shift fork shaft ball socket adapted to the steel ball (9).

8. An interlocking structure according to claim 1, characterized in that: The second shift fork shaft (10) is provided with a shift fork shaft ball socket adapted to the steel ball (9).

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