A gearbox input shaft positioning tool

Abstract

The utility model discloses a gearbox input shaft positioning frock, it includes positioning subassembly and fastening subassembly, the positioning subassembly includes fixed part and a plurality of positioning piece, the fixed part is the axle shape structure, and one end of fixed part is used for with the output of lathe's rotating mechanism coaxial detachable fixed connection, each positioning piece is along the circumferential setting in the side of fixed part, and all with another end fixed connection of fixed part, form a certain positioning groove between adjacent positioning piece, each positioning groove is used for the each tooth of input shaft's internal gear one -to -one correspondence sliding insertion. The utility model has the beneficial effects that: when adopting this positioning frock to clamp and fix input shaft, can guarantee that the internal gear of input shaft can be always concentric with the output of lathe's rotating mechanism, thereby guaranteeing that the first annular surface, the second annular surface and the internal gear of the processed input shaft can be completely concentric, and improving the machining precision of input shaft.

Description

Technical Field

[0001] This utility model relates to the field of gearbox input shaft machining technology, and in particular to a gearbox input shaft positioning fixture. Background Technology

[0002] The gearbox input shaft is a key component that transmits engine power to the inside of the gearbox. Existing gearbox input shafts, such as... Figure 1 - Figure 2 As shown, the input shaft 100 includes a shaft body 110, an internal gear 120, and a collar 130. The shaft body 110 is a tubular structure with openings at both ends, and has a first open end 111 and a second open end 112. The end face of the first open end 111 is a plane, and the end face of the second open end 112 is a conical surface. The shaft body 110 has a plurality of lubricating oil holes 113 circumferentially opened. The outer wall of the shaft body 110 has a first annular surface 114. The internal gear 120 is fixed inside the shaft body 110 and close to the first open end 111. The collar 130 is fixedly sleeved on the outer wall of the shaft body 110 and close to the second open end 112. The end face of the collar 130 is flush with the end face of the second open end 112. The end face of the collar 130 has a second annular surface 131.

[0003] In the aforementioned production process of the gearbox input shaft, a first annular surface needs to be machined on the outer wall of the input shaft body, and a second annular surface also needs to be machined on the end face of the input shaft collar. Generally, a CNC lathe (such as the CNC lathe disclosed in application number 201521036991.5) is used to machine the first and second annular surfaces of the input shaft. When machining the first and second annular surfaces of the input shaft using a CNC lathe, the input shaft needs to be clamped and fixed. However, when using the three-jaw chuck built into the CNC lathe to clamp and fix the input shaft, the three jaws directly contact the internal gear of the input shaft. Since the internal gear has a toothed area and a toothed area, when the three jaws are pressed against the toothed area and the toothed area respectively, the concentricity of the internal gear and the three-jaw chuck is prone to slight deviations. This results in the first and second annular surfaces of the machined input shaft and the internal gear not being completely concentric, leading to poor machining accuracy. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a gearbox input shaft positioning fixture to solve the technical problem that when machining the first and second annular surfaces of the input shaft using a CNC lathe, the lack of a suitable positioning fixture to clamp and fix the input shaft easily leads to the first and second annular surfaces of the input shaft and the internal gear not being completely concentric, resulting in poor machining accuracy.

[0005] To achieve the above technical objectives, the present invention provides a gearbox input shaft positioning fixture, comprising:

[0006] The positioning assembly includes a fixing member and multiple positioning members. The fixing member is a shaft-shaped structure, and one end of the fixing member is coaxially and detachably fixedly connected to the output end of the rotating mechanism of the lathe. Each positioning member is arranged circumferentially on the side of the fixing member and is fixedly connected to the other end of the fixing member. A positioning groove is formed between adjacent positioning members. Each positioning groove is used for each tooth of the internal gear of the input shaft to slide into the groove one by one.

[0007] Fastening assembly for detachably connecting the fixing member and the shaft body of the input shaft.

[0008] Furthermore, the fixing component includes a fixing plate and a fixing shaft. The fixing plate is used for coaxial and detachably fixed connection with the output end of the rotating mechanism of the lathe. One end of the fixing shaft is coaxially fixedly connected to the fixing plate. Each of the positioning components is arranged circumferentially on the side of the fixing shaft and is fixedly connected to the other end of the fixing shaft.

[0009] Furthermore, the fixing component also includes a stop ring, which is coaxially fixedly sleeved on one end of the fixed shaft. The end face of the stop ring away from the fixed disk forms a stop surface, which is used to abut against the end face of the first open end of the input shaft body.

[0010] Furthermore, the outer diameter of the stop ring is larger than the outer diameter of the input shaft body.

[0011] Furthermore, the positioning element is a rod-shaped structure and extends axially along the fixed shaft.

[0012] Furthermore, the fastening assembly includes multiple bolts, and multiple first screw holes are circumferentially opened on the arc-shaped wall at the other end of the fixed shaft. Each first screw hole is used to communicate with each lubricating oil hole on the shaft body of the input shaft. Each bolt is used to be inserted into each lubricating oil hole and the corresponding first screw hole, and screwed into each first screw hole.

[0013] Furthermore, the fastening assembly includes a docking shaft and a clamping shaft. One end of the docking shaft is detachably and fixedly connected to the fixing member. One end of the clamping shaft is coaxially and fixedly connected to the other end of the docking shaft. The clamping shaft is a conical structure, and the conical wall of the clamping shaft is used to abut against the conical surface of the second open end of the input shaft body.

[0014] Furthermore, the fastener also includes a mating core, one end of which is coaxially and fixedly connected to the other end of the fixed shaft. A thread is formed on the outer side wall of the mating core, and a second threaded hole is provided on one end of the mating shaft, which is sleeved on the mating core through the second threaded hole. The second threaded hole is screwed into the thread.

[0015] Furthermore, when the conical wall of the abutting shaft abuts against the conical surface of the second open end of the input shaft body, the end face of the abutting shaft is located inside the input shaft body.

[0016] Furthermore, the fastening assembly also includes a grip, one end of which is coaxially and fixedly connected to the other end of the abutment shaft.

[0017] Compared with the prior art, the beneficial effects of this utility model include: In use, one end of the fixing member is detachably and coaxially fixedly connected to the output end of the lathe's rotating mechanism. Then, each tooth of the input shaft's internal gear is slidably inserted into each positioning groove. At this time, each positioning member is slidably inserted into each tooth groove of the input shaft's internal gear, thereby restricting the rotation and radial movement of the input shaft and ensuring that the input shaft's internal gear and the output end of the lathe's rotating mechanism are concentric. Then, the fastening assembly is detachably connected to the fixing member and the shaft body of the input shaft, thereby restricting the axial movement of the input shaft. Then, the lathe's cutting tool is used to machine the first and second annular surfaces of the input shaft. When the input shaft is clamped and fixed using this positioning fixture, it can be ensured that the input shaft's internal gear is always concentric with the output end of the lathe's rotating mechanism, thereby ensuring that the machined first and second annular surfaces and the internal gear of the input shaft are completely concentric, improving the machining accuracy of the input shaft. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an existing gearbox input shaft;

[0019] Figure 2 This is a three-dimensional structural diagram of the existing gearbox input shaft from another perspective;

[0020] Figure 3 This is a three-dimensional structural schematic diagram of the first embodiment of a gearbox input shaft positioning fixture provided by this utility model;

[0021] Figure 4 yes Figure 3 A cross-sectional view of a gearbox input shaft positioning fixture during input shaft positioning.

[0022] Figure 5 This is a three-dimensional structural schematic diagram of the second embodiment of the gearbox input shaft positioning fixture provided by this utility model;

[0023] Figure 6 yes Figure 5 A cross-sectional view of a gearbox input shaft positioning fixture during input shaft positioning;

[0024] In the diagram: 100 - Input shaft, 110 - Shaft body, 111 - First open end, 112 - Second open end, 113 - Lubricating oil hole, 114 - First annular surface, 120 - Internal gear, 130 - Shaft collar, 131 - Second annular surface, 200 - Positioning component, 210 - Fixing component, 211 - Fixing disc, 212 - Fixing shaft, 2121 - First screw hole, 213 - Stop ring, 2131 - Stop surface, 214 - Connecting core, 2141 - Thread, 220 - Positioning component, 300 - Fastening component, 310 - Bolt, 320 - Connecting shaft, 321 - Second screw hole, 330 - Clamping shaft, 340 - Handle. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0026] This utility model provides a positioning fixture for a gearbox input shaft, the structure of which is as follows: Figure 3 - Figure 6 As shown, the device includes a positioning assembly 200 and a fastening assembly 300. The positioning assembly 200 includes a fixing member 210 and multiple positioning members 220. The fixing member 210 has a shaft-like structure, and one end of the fixing member 210 is coaxially and detachably fixedly connected to the output end of the rotating mechanism of the lathe. Each positioning member 220 is arranged circumferentially on the side of the fixing member 210 and is fixedly connected to the other end of the fixing member 210. A positioning groove is formed between adjacent positioning members 220. Each positioning groove is used for the corresponding sliding insertion of each tooth of the internal gear 120 of the input shaft 100. The fastening assembly 300 is used to detachably connect the fixing member 210 and the shaft body 110 of the input shaft 100.

[0027] In use, one end of the fixing member 210 is detachably and coaxially fixedly connected to the output end of the lathe's rotating mechanism. Then, each tooth of the internal gear 120 of the input shaft 100 is slidably inserted into each of the positioning slots. At this time, each of the positioning members 220 is slidably inserted into each tooth groove of the internal gear 120 of the input shaft 100, thereby restricting the rotation and radial movement of the input shaft 100 and ensuring that the internal gear 120 of the input shaft 100 and the output end of the lathe's rotating mechanism are concentric. Then, the fastening assembly 300 is used to fasten the fixing member 210 and the internal gear 120 of the input shaft 100. The shaft body 110 of the input shaft 100 is detachably connected, thereby restricting the axial movement of the input shaft 100. Then, the first annular surface 114 and the second annular surface 131 of the input shaft 100 are machined using a lathe tool. When the input shaft 100 is clamped and fixed using this positioning fixture, it can be ensured that the internal gear 120 of the input shaft 100 is always concentric with the output end of the lathe's rotating mechanism, thereby ensuring that the first annular surface 114, the second annular surface 131 and the internal gear 120 of the machined input shaft 100 are completely concentric, improving the machining accuracy of the input shaft 100.

[0028] As a preferred embodiment, please refer to Figure 3 and Figure 4 The fixing member 210 includes a fixing disk 211 and a fixing shaft 212. The fixing disk 211 is coaxially and detachably fixedly connected to the output end of the lathe's rotating mechanism. One end of the fixing shaft 212 is coaxially and fixedly connected to the fixing disk 211. Each of the positioning members 220 is arranged circumferentially on the side of the fixing shaft 212 and is fixedly connected to the other end of the fixing shaft 212. The fixing member 210 is coaxially and detachably fixedly connected to the output end of the lathe's rotating mechanism via the fixing disk 211. The fixing member 210 is fixedly connected to each of the positioning members 220 via the fixing shaft 212, thereby ensuring that the external gear formed by the positioning members 220 can be concentric with the output end of the lathe's rotating mechanism.

[0029] As a preferred embodiment, please refer to Figure 3 and Figure 4 The fixed plate 211 is detachably and fixedly connected to the output end of the lathe's rotating mechanism via multiple screws and nuts. The fixed plate 211 has multiple connecting holes circumferentially opened, and each connecting hole is used to correspond one-to-one with each mounting hole on the output end of the lathe's rotating mechanism, so that each screw can pass through the corresponding connecting hole and mounting hole to realize the screw connection between the fixed plate 211 and the output end of the lathe's rotating mechanism.

[0030] As a preferred embodiment, please refer to Figure 3 and Figure 4The fixing member 210 also includes a stop ring 213, which is coaxially fixedly sleeved on one end of the fixing shaft 212. The end face of the stop ring 213 away from the fixing plate 211 forms a stop surface 2131, which is used to abut against the end face of the first open end 111 of the shaft body 110 of the input shaft 100. When each tooth of the internal gear 120 of the input shaft 100 slides into the respective positioning grooves in a corresponding manner, and the end face of the first open end 111 of the shaft body 110 of the input shaft 100 is in contact with the stop surface 2131, the input shaft 100 is clamped in place.

[0031] As a preferred embodiment, please refer to Figure 3 and Figure 4 The outer diameter of the stop ring 213 is larger than the outer diameter of the shaft body 110 of the input shaft 100, thereby increasing the contact area between the stop surface 2131 and the shaft body 110 of the input shaft 100 and improving the contact effect.

[0032] As a preferred embodiment, please refer to Figure 3 and Figure 4 The positioning element 220 is a rod-shaped structure and extends axially along the fixed shaft 212. Since each tooth of the internal gear 120 of the input shaft 100 is elongated and extends axially along the shaft body 110 of the input shaft 100, the positioning element 220 is a rod-shaped structure and extends axially along the fixed shaft 212 so that each positioning element 220 can better fit with the tooth groove of the internal gear 120 of the input shaft 100.

[0033] As a preferred embodiment, please refer to Figure 3 and Figure 4The fastening assembly 300 includes a plurality of bolts 310. A plurality of first screw holes 2121 are circumferentially formed on the arc-shaped wall at the other end of the fixed shaft 212. Each first screw hole 2121 is used to communicate one-to-one with each lubricating oil hole 113 on the shaft body 110 of the input shaft 100. Each bolt 310 is used to insert into each lubricating oil hole 113 and the corresponding first screw hole 2121, and to be screwed into each first screw hole 2121. When each tooth of the internal gear 120 of the input shaft 100 slides into each of the positioning grooves one-to-one, and the input shaft... When the end face of the first open end 111 of the shaft body 110 of the input shaft 100 is aligned with the stop surface 2131, the input shaft 100 is clamped in place. At this time, each lubricating oil hole 113 on the shaft body 110 of the input shaft 100 is connected to each of the first screw holes 2121 in a one-to-one correspondence. Each of the bolts 310 is inserted into each lubricating oil hole 113 and the corresponding first screw holes 2121 in sequence, and each of the bolts 310 is screwed into each of the first screw holes 2121 in a one-to-one correspondence. Thus, the shaft body 110 of the input shaft 100 and the fixed shaft 212 can be detachably connected.

[0034] In another embodiment, please refer to Figure 5 and Figure 6 The fastening assembly 300 includes a docking shaft 320 and a clamping shaft 330. One end of the docking shaft 320 is detachably and fixedly connected to the fixing member 210. One end of the clamping shaft 330 is coaxially and fixedly connected to the other end of the docking shaft 320. The clamping shaft 330 is a conical structure. The conical wall of the clamping shaft 330 is used to abut against the conical surface of the second opening end 112 of the shaft body 110 of the input shaft 100, thereby axially limiting the input shaft 100 via the clamping shaft 330 and the stop ring 213.

[0035] As a preferred embodiment, please refer to Figure 5 and Figure 6 The fixing member 210 also includes a docking core 214. One end of the docking core 214 is coaxially fixedly connected to the other end of the fixing shaft 212. A thread 2141 is formed on the outer side wall of the docking core 214. A second screw hole 321 is provided on one end of the docking shaft 320, and the shaft is sleeved on the docking core 214 through the second screw hole 321. The second screw hole 321 is screwed to the thread 2141. By rotating the abutting shaft 330 in the forward or reverse direction, the docking shaft 320 can be screwed onto or unscrewed from the docking core 214, thereby realizing the portable assembly and disassembly of the docking shaft 320 and the docking core 214.

[0036] As a preferred embodiment, please refer to Figure 5 and Figure 6When the tapered wall of the clamping shaft 330 abuts against the tapered surface of the second opening end 112 of the shaft body 110 of the input shaft 100, the end face of the clamping shaft 330 is located inside the shaft body 110 of the input shaft 100, which facilitates the lathe tool to perform turning machining on the second annular surface 131 of the input shaft 100.

[0037] As a preferred embodiment, please refer to Figure 5 and Figure 6 The fastening assembly 300 also includes a grip 340, one end of which is coaxially fixedly connected to the other end of the abutment shaft 330. When a person holds the grip 340, it is easy to drive the abutment shaft 330 to rotate in the forward or reverse direction, thereby allowing the docking shaft 320 to be screwed onto or off the docking core 214, making operation convenient.

[0038] To better understand this utility model, the following is combined with... Figure 1 - Figure 6 The working principle of the technical solution of this utility model will be described in detail below:

[0039] In use, the fixed plate 211 is detachably and coaxially fixedly connected to the output end of the lathe's rotating mechanism. Then, each tooth of the internal gear 120 of the input shaft 100 is slidably inserted into each of the positioning slots. At this time, each of the positioning elements 220 is slidably inserted into each tooth groove of the internal gear 120 of the input shaft 100, thereby restricting the rotation and radial movement of the input shaft 100 and ensuring that the internal gear 120 of the input shaft 100 and the output end of the lathe's rotating mechanism are concentric. When each tooth of the internal gear 120 of the input shaft 100 is slidably inserted into each of the positioning slots, and the end face of the first opening end 111 of the shaft body 110 of the input shaft 100 is aligned with the stop surface 2131, the input shaft 100 is clamped in place. At this time, each lubricating oil hole 113 on the shaft body 110 of the input shaft 100 and each of the first screw holes are aligned. The bolts 310 are sequentially inserted into the lubricating oil holes 113 and the corresponding first screw holes 2121, and the bolts 310 are screwed into the first screw holes 2121 one by one. This allows the shaft body 110 of the input shaft 100 to be detachably connected to the fixed shaft 212, thereby restricting the axial movement of the input shaft 100. Then, the first annular surface 114 and the second annular surface 131 of the input shaft 100 are machined using a lathe tool. When the input shaft 100 is clamped and fixed using this positioning fixture, it can be ensured that the internal gear 120 of the input shaft 100 is always concentric with the output end of the lathe's rotating mechanism. This ensures that the first annular surface 114, the second annular surface 131, and the internal gear 120 of the machined input shaft 100 are completely concentric, improving the machining accuracy of the input shaft 100.

[0040] The gearbox input shaft positioning fixture provided by this utility model has the following beneficial effects:

[0041] (1) When each tooth of the internal gear 120 of the input shaft 100 is slidably inserted into each of the positioning slots, the rotation and radial movement of the input shaft 100 can be restricted, and the output end of the internal gear 120 of the input shaft 100 and the rotation mechanism of the lathe can be concentric. When the end face of the first opening end 111 of the shaft body 110 of the input shaft 100 is aligned with the stop surface 2131, the input shaft 100 is clamped in place. At this time, each lubricating oil hole 113 on the shaft body 110 of the input shaft 100 is connected to each of the first screw holes 2121. Each bolt 310 is inserted into each lubricating oil hole 113 and the corresponding first screw hole 2121 in sequence, and each bolt 310 is screwed into each of the first screw holes 2121 in a corresponding manner. Thus, the shaft body 110 of the input shaft 100 and the fixed shaft 212 can be detachably connected, thereby restricting the axial movement of the input shaft 100.

[0042] (2) When each tooth of the internal gear 120 of the input shaft 100 is slidably inserted into each of the positioning slots, the rotation and radial movement of the input shaft 100 can be restricted, and the internal gear 120 of the input shaft 100 and the output end of the rotating mechanism of the lathe can be concentric. When the end face of the first open end 111 of the shaft body 110 of the input shaft 100 is aligned with the stop surface 2131, the input shaft 100 is clamped in place. Rotating the abutment shaft 330 in the forward direction can cause the docking shaft 320 to be screwed onto the docking core 214 until the conical wall of the abutment shaft 330 abuts against the conical surface of the second open end 112 of the shaft body 110 of the input shaft 100. Thus, the input shaft 100 can be axially limited by the abutment shaft 330 and the stop ring 213.

[0043] (3) When the input shaft 100 is clamped and fixed using this positioning fixture, it can be ensured that the internal gear 120 of the input shaft 100 is always concentric with the output end of the rotating mechanism of the lathe, thereby ensuring that the first annular surface 114, the second annular surface 131 and the internal gear 120 of the machined input shaft 100 are completely concentric, thus improving the machining accuracy of the input shaft 100.

[0044] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A gearbox input shaft positioning fixture, characterized in that, include: The positioning assembly includes a fixing member and multiple positioning members. The fixing member is a shaft-shaped structure, and one end of the fixing member is coaxially and detachably fixedly connected to the output end of the rotating mechanism of the lathe. Each positioning member is arranged circumferentially on the side of the fixing member and is fixedly connected to the other end of the fixing member. A positioning groove is formed between adjacent positioning members. Each positioning groove is used for each tooth of the internal gear of the input shaft to slide into the groove one by one. Fastening assembly for detachably connecting the fixing member and the shaft body of the input shaft.

2. The gearbox input shaft positioning fixture according to claim 1, characterized in that, The fixing component includes a fixing plate and a fixing shaft. The fixing plate is used to be coaxially and detachably fixedly connected to the output end of the rotating mechanism of the lathe. One end of the fixing shaft is coaxially fixedly connected to the fixing plate. Each of the positioning components is arranged circumferentially on the side of the fixing shaft and is fixedly connected to the other end of the fixing shaft.

3. The gearbox input shaft positioning fixture according to claim 2, characterized in that, The fixing component also includes a stop ring, which is coaxially fixedly sleeved on one end of the fixed shaft. The end face of the stop ring away from the fixed disk forms a stop surface, which is used to abut against the end face of the first open end of the input shaft body.

4. The gearbox input shaft positioning fixture according to claim 3, characterized in that, The outer diameter of the stop ring is larger than the outer diameter of the input shaft body.

5. The gearbox input shaft positioning fixture according to claim 2, characterized in that, The positioning element is a rod-shaped structure and extends axially along the fixed shaft.

6. The gearbox input shaft positioning fixture according to claim 2, characterized in that, The fastening assembly includes multiple bolts. Multiple first screw holes are circumferentially opened on the arc-shaped wall at the other end of the fixed shaft. Each first screw hole is used to communicate with each lubricating oil hole on the shaft body of the input shaft. Each bolt is used to be inserted into each lubricating oil hole and the corresponding first screw hole, and screwed into each first screw hole.

7. The gearbox input shaft positioning fixture according to claim 2, characterized in that, The fastening assembly includes a docking shaft and a clamping shaft. One end of the docking shaft is detachably and fixedly connected to the fixing member. One end of the clamping shaft is coaxially and fixedly connected to the other end of the docking shaft. The clamping shaft is a conical structure, and the conical wall of the clamping shaft is used to abut against the conical surface of the second open end of the input shaft body.

8. The gearbox input shaft positioning fixture according to claim 7, characterized in that, The fastener also includes a mating core, one end of which is coaxially and fixedly connected to the other end of the fixed shaft. A thread is formed on the outer side wall of the mating core. A second threaded hole is opened on one end of the mating shaft, and the shaft is sleeved on the mating core through the second threaded hole. The second threaded hole is screwed into the thread.

9. The gearbox input shaft positioning fixture according to claim 7, characterized in that, When the conical wall of the abutment shaft abuts against the conical surface of the second open end of the input shaft body, the end face of the abutment shaft is located inside the input shaft body.

10. The gearbox input shaft positioning fixture according to claim 7, characterized in that, The fastening assembly also includes a grip, one end of which is coaxially and fixedly connected to the other end of the abutment shaft.

Images