Interlocking structure for multiple shifting fork shafts

Abstract

The interlocking structure for the multiple shifting fork shafts comprises a supporting plate and the shifting fork shafts, the multiple shifting fork shafts are arranged, the supporting plate is provided with shifting fork holes in one-to-one correspondence with all the shifting fork shafts, and an interlocking through hole is formed between every two adjacent shifting fork shafts; the supporting plate is provided with longitudinal interlocking holes communicated with the interlocking through holes, the longitudinal interlocking holes are provided with matched locking pieces, each interlocking through hole is provided with two interlocking pins and one interlocking piece, the locking pieces are locked in the corresponding longitudinal interlocking holes so as to push the corresponding interlocking pieces to be squeezed into the position between the two corresponding interlocking pins, and the locking pieces are matched with the locking pieces. And therefore, the two interlocking pins are respectively clamped into the interlocking grooves in the side surfaces of the corresponding shifting fork shafts. The shifting fork interlocking structure is optimized, the shifting fork assembling difficulty is reduced, and the shifting fork assembling process is simplified.

Description

Technical Field

[0001] This invention belongs to the field of gearbox technology, and more specifically, relates to an interlocking structure for multi-shift fork shafts. Background Technology

[0002] Currently, multi-speed front and rear gearboxes commonly use gearbox interlock structures. The gearbox interlock includes a support plate, multiple shift forks, and multiple interlock pins. All shift forks are connected to the support plate, and each pair of adjacent shift forks forms an interlock relationship through interlock pins.

[0003] However, the aforementioned gearbox interlock structure has some shortcomings: for example, after inserting two shift forks, the third shift fork cannot be installed due to the restriction of the already installed interlocking pin. For instance, patent application number 2015208681241 discloses a multi-axis self-locking interlock device, which includes a self-locking interlock block, a first shift fork shaft, a second shift fork shaft, and a third shift fork shaft. The first and third shift fork shafts are symmetrically arranged on both sides of the second shift fork shaft. A first neutral position groove is provided on the outer circumferential surface of both the first and third shift fork shafts facing the second shift fork shaft, and second neutral position grooves are provided on both sides of the outer circumferential surface of the second shift fork shaft... Clearly, the installation of the shift fork is restricted by the locking pin of the self-locking interlock block, and the first, second, and third shift fork shafts cannot be installed simultaneously.

[0004] As can be seen from the above structure, the existing multi-axis self-locking interlocking structure suffers from mutual interference between the three shift forks and their corresponding interlocking pins during assembly, leading to assembly difficulties and a complex assembly process. Therefore, a multi-shift fork interlocking structure with lower assembly difficulty is needed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention optimizes the shift fork interlocking structure, reduces the difficulty of shift fork assembly, and simplifies the shift fork assembly process. The invention provides an interlocking structure for multiple shift fork shafts, including a support plate and shift fork shafts. Each shift fork shaft has multiple corresponding shift fork holes on the support plate, and an interlocking through hole is provided between each pair of adjacent shift fork shafts. The support plate has a longitudinal interlocking hole communicating with each interlocking through hole, and the longitudinal interlocking hole has a matching locking element. Each interlocking through hole has two interlocking pins and one interlocking element. The locking element is locked into the corresponding longitudinal interlocking hole, pushing the corresponding interlocking element between the corresponding two interlocking pins, thereby causing the two interlocking pins to respectively engage in the interlocking grooves on the side of the corresponding shift fork shaft.

[0006] The preferred embodiment of the interlocking structure for the multi-shift fork shaft in this invention is as follows: all longitudinal interlocking holes are threaded holes, all locking components are threaded plugs, the locking components are detachably connected to the corresponding longitudinal interlocking holes via threads, and the interlocking components are steel balls. The steel balls have high strength and a smooth surface, allowing them to be smoothly inserted into the longitudinal interlocking holes and fall into the interlocking through holes, while also meeting the rigidity requirements for tightening two adjacent interlocking pins.

[0007] The beneficial effects of the interlocking structure for the multi-shift fork shaft in this invention are as follows: 1. Based on the existing interlocking structure, the existing single interlocking pin is replaced with a three-section structure, that is, two smaller interlocking pins and one interlocking component. The interlocking component is installed later during the assembly process, which effectively solves the problem of multiple shift forks affecting each other and the high assembly difficulty.

[0008] 2. The assembly process of the entire multi-speed front and rear gearbox is the same as the existing assembly process. It does not require changing the order of the established process, has no impact on the existing assembly technology, does not require changing the normal assembly sequence, and simplifies the assembly process of the interlock structure, thereby improving the overall assembly efficiency. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the interlocking structure of the multi-fork shaft 2 in this invention.

[0011] Reference numerals: 1. Support plate; 2. Shift fork shaft; 3. Shift fork hole; 4. Interlocking through hole; 5. Interlocking pin; 6. Interlocking groove; 7. Internal pin hole; 8. Internal pin; 9. Longitudinal interlocking hole; 10. Locking element; 11. Interlocking element. Detailed Implementation

[0012] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0013] like Figure 1 As shown, this embodiment provides an interlocking structure for multiple shift fork shafts 2, including a support plate 1 and shift fork shafts 2. There are three shift fork shafts 2, and the support plate 1 has shift fork holes 3 corresponding to each shift fork shaft 2. Each shift fork hole 3 is adapted to a shift fork shaft 2. The support plate 1 also has interlocking through holes 4 between every two adjacent shift fork shafts 2, for installing interlocking pins 5. Furthermore, the interlocking grooves 6 on both sides of one of the three shift fork shafts 2 are connected through built-in pin holes 7, and the built-in pin holes 7 are equipped with matching inner pins 8.

[0014] To prevent the three shift fork shafts 2 from interfering with each other during assembly, the support plate 1 in this embodiment is provided with a longitudinal interlocking hole 9 communicating with each interlocking through hole 4, and the longitudinal interlocking hole 9 is provided with a suitable locking member 10. Here, the longitudinal interlocking holes 9 are all threaded holes, and the locking members 10 are all threaded plugs with internal hexagonal sockets. The locking members 10 can be easily screwed into or out of the longitudinal interlocking using a suitable internal hexagonal wrench.

[0015] In addition to two interlocking pins 5 in each interlocking through hole 4, there is also an interlocking component 11, which is a steel ball. The two ends of the inner pin 8 respectively press against the two adjacent interlocking pins 5.

[0016] This embodiment also provides an assembly method for the interlocking structure of the multi-shift fork shaft 2. The three shift fork holes 3, from left to right, are the first shift fork hole 3, the second shift fork hole 3, and the third shift fork hole 3, respectively. The specific steps are as follows: S1. Assemble the shift fork sub-assembly by mounting the gear shaft parts onto the support plate 1 via bearings.

[0017] S2. Insert the two interlocking pins 5 into the left interlocking through hole 4 through the first shift fork hole 3, keeping the gearbox horizontal to prevent the interlocking pins 5 from coming out from the other side of the interlocking through hole 4. Then insert a shift fork shaft 2 into the first shift fork hole 3 and place the shift fork shaft 2 in a fixed position so that the interlocking groove 6 on the side of the shift fork shaft 2 is exactly aligned with the corresponding interlocking through hole 4, and the limiting of the shift fork shaft 2 is completed by the shift fork.

[0018] S3. Insert the inner pin 8 into the inner pin hole 7, ensuring that both ends of the inner pin 8 do not extend beyond the inner pin hole 7. Then, insert the shift fork shaft 2 with the inner pin 8 into the middle second shift fork hole 3. Place the shift fork shaft 2 in a fixed position so that the interlocking grooves 6 on both sides of the shift fork shaft 2 are aligned with the corresponding interlocking through holes 4.

[0019] S4. Insert the other two interlock pins 5 into the interlock through hole 4 on the right side through the third shift fork hole 3, keeping the gearbox horizontal to prevent the interlock pins 5 from coming out from the other side of the interlock through hole 4. Then insert the last shift fork shaft 2 and place the shift fork shaft 2 in a fixed position so that the interlock groove 6 on the side of the shift fork shaft 2 is exactly aligned with the interlock through hole 4. The limiting of the shift fork shaft 2 is completed by the shift fork.

[0020] S5. Close support plate 1. Assembly inside the box is complete.

[0021] S6. Using a tool, pry open each pair of adjacent interlocking pins 5 through the longitudinal interlocking holes 9. Then, insert two steel balls one by one into the two longitudinal interlocking holes 9, ensuring each steel ball is positioned between its corresponding two interlocking pins 5, so that the corresponding interlocking pins 5 are engaged in their respective interlocking grooves 6. Simultaneously, the two ends of the inner pin 8 press against the two adjacent interlocking pins 5. Finally, use an Allen wrench to tighten the two plugs one by one into the two longitudinal interlocking holes 9. Move the shift fork shaft 2 to ensure smooth operation of the interlocking structure. Once confirmed to be correct, the assembly is complete.

[0022] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. An interlocking structure for multiple shift fork shafts, comprising a support plate and shift fork shafts, wherein the shift fork shafts are provided in multiple manner and the support plate is provided with shift fork holes corresponding to all shift fork shafts, and an interlocking through hole is provided between each pair of adjacent shift fork shafts. Its features are: The support plate is provided with a longitudinal interlocking hole communicating with each interlocking through hole, and the longitudinal interlocking hole is provided with a matching locking member. Each interlocking through hole is provided with two interlocking pins and one interlocking member. The locking member is locked in the corresponding longitudinal interlocking hole to push the corresponding interlocking member into the space between the two corresponding interlocking pins, thereby causing the two interlocking pins to be respectively engaged in the interlocking grooves on the side of the corresponding shift fork shaft.

2. The interlocking structure for a multi-shift fork shaft according to claim 1, characterized in that: All longitudinal interlocking holes are threaded holes, and all locking components are threaded plugs. The locking components are detachably connected to the corresponding longitudinal interlocking holes via threads.

3. The interlocking structure for a multi-shift fork shaft according to claim 2, characterized in that: The interlocking component is a steel ball.

4. The interlocking structure for a multi-shift fork shaft according to any one of claims 3, characterized in that: The shift fork shaft and shift fork hole are provided in three ways. The interlocking grooves on both sides of the shift fork shaft located in the middle of the three shift fork shafts are connected through the built-in pin hole, and the built-in pin hole is provided with a matching inner pin.

5. The interlocking structure for a multi-shift fork shaft according to claim 4, characterized in that: The two ends of the inner pin are respectively engaged with two adjacent interlocking pins.

6. An assembly method for an interlocking structure for a multi-shift fork shaft, characterized in that: The interlocking structure for the multi-fork shaft as described in claim 5, wherein the three fork holes, from left to right, are the first fork hole, the second fork hole, and the third fork hole, are as follows: S1. Assemble the shift fork sub-assembly by mounting the gear shaft parts onto the support plate via bearings. S2. Insert the two interlock pins into the interlock through hole on the left side through the first shift fork hole, keep the gearbox horizontal, insert a shift fork shaft into the first shift fork hole, keep the shift fork shaft fixed and the interlock groove on the side of the shift fork shaft is aligned with the corresponding interlock through hole. S3. Insert the inner pin into the inner pin hole and ensure that both ends of the inner pin do not extend beyond the inner pin hole. Then insert the shift fork shaft with the inner pin into the middle second shift fork hole, keeping the shift fork shaft fixed and the interlocking groove on the side of the shift fork shaft facing the corresponding interlocking through hole. S4. Insert the other two interlock pins into the interlock through hole on the right side through the third shift fork hole, keep the gearbox horizontal, and then insert the last shift fork shaft, keeping the shift fork shaft fixed and the interlock groove on the side of the shift fork shaft facing the corresponding interlock through hole. S5. Close the support plate; the internal assembly of the box is complete. S6. Use a tool to pry open each pair of adjacent interlocking pins through the longitudinal interlocking holes, and then place two steel balls into the two longitudinal interlocking holes one by one, with each steel ball positioned between the corresponding two interlocking pins, so that the corresponding interlocking pins are engaged in the corresponding interlocking grooves, while the two ends of the inner pin are respectively pressed against the two adjacent interlocking pins. S7. Use an Allen wrench to tighten the two plugs into the two longitudinal interlocking holes one by one, and move the shift fork shaft to ensure that the interlocking structure operates smoothly to complete the assembly.

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