Gearbox shell machining and positioning tool

Abstract

The invention belongs to the technical field of positioning tools, and particularly relates to a gearbox shell machining positioning tool which comprises a gearbox shell body, a positioning tool body and a supporting structure, the positioning tool body comprises a first supporting plate and a second supporting plate, and the upper surface of the first supporting plate is fixedly connected with a supporting guide rod; and a cross-shaped groove is formed in the supporting guide rod, a cross-shaped rod is slidably connected into the cross-shaped groove, and first bearings are embedded in the inner side of the first supporting plate and the inner side of the second supporting plate correspondingly. The side faces of the first clamp and the second clamp can be buckled and pressed on the edge of the round hole, the first clamp and the second clamp are opposite in direction and distributed in the shape like the Chinese character'mi ', and therefore stable clamping and fixing can be formed on the edge of the round hole of the gearbox shell, and anti-skid grooves formed in the sides of the first clamp and the second clamp are beneficial to improving friction force. And the first clamp and the second clamp are adjusted to present different angles, so that circular holes with different sizes in the gearbox shell can be conveniently adapted.

Description

Technical Field

[0001] The invention belongs to the technical field of positioning tooling, and in particular relates to a positioning tooling for machining a gearbox housing. Background Art

[0002] The gearbox is a very important component in the automobile transmission system. Its main function is to adapt to different driving conditions by changing the gear combination, thereby improving the engine's working efficiency and the vehicle's power performance. The gearbox can be divided into manual gearbox (MT), automatic gearbox (AT), manual-automatic gearbox, continuously variable transmission (CVT) and dual clutch gearbox (DSG). The main function of the gearbox housing is to seal the environment to prevent dust, dirt, water and other contaminants from entering, protect the delicate internal components, provide a mounting base for the transmission mechanism, gears, shafts, etc. of the transmission, and ensure their proper alignment and engagement, and provide sufficient rigidity and strength to withstand the load and vibration during the operation of the transmission, ensuring overall stability. Tooling is required for processing the gearbox housing.

[0003] The patent application (application number: CN202221378928.X) discloses a gearbox casing rotating processing tool, which drives the shaft rod to rotate through a driving motor, so that the operating table can be rotated on the processing table, and then the gearbox casing can be rotated on the operating table. When the gearbox casing is fixed, the lifting plate is raised through the electric telescopic rod, so that the inclined rod is opened, so that the pneumatic spring presses the inside of the gearbox, which is convenient for fixing the gearbox. When fixing, the outer surface of the gearbox will not be blocked, which is convenient for processing operations.

[0004] The above application provides support from the inside of the gearbox housing. However, since the gearbox housing is usually made by casting or forging, its surface and inner surface are not relatively flat, and both the outer surface and the inner surface are irregular in shape. Therefore, neither the above application nor the conventional tooling can guarantee the stability of the gearbox housing when fixing and positioning the gearbox housing. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a gearbox housing machining and positioning tool.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gearbox housing processing positioning tool, comprising a gearbox housing body, a positioning tool body and a supporting structure, the positioning tool body comprising a first support plate and a second support plate, the upper surface of the first support plate is fixedly connected to a support guide rod, a cross groove is provided inside the support guide rod, a cross rod is slidably connected inside the cross groove, a first bearing is embedded in the inner sides of the first support plate and the second support plate, a second bearing is installed at the ends of the support guide rod and the cross rod, the inner walls of the first bearing and the second bearing are fixedly connected to a threaded rod, a first moving block is threadedly connected to the surface of the threaded rod, a first connecting seat is fixedly installed on one side of the first moving block, a second moving block is slidably installed on the surface of the support guide rod, and the second The surface of the moving block is fixedly connected to the second connecting seat, the first connecting seat and the second connecting seat are movably connected to the first connecting rod, the surface of the cross rod is slidably installed with the third moving block, the surface of the third moving block is fixedly connected to the third connecting seat, the first connecting seat and the third connecting seat are movably connected to the second connecting rod, the surface of the supporting guide rod is fixedly connected to the fourth connecting seat, the surface of the fourth connecting seat is movably installed with the first clamp, the first clamp and the second connecting seat are movably connected to the third connecting rod, the surface of the cross rod is fixedly connected to the fifth connecting seat, the surface of the fifth connecting seat is movably installed with the second clamp, the second clamp and the third connecting seat are movably connected to the fourth connecting rod, and anti-slip grooves are provided on both sides of the first clamp and the second clamp.

[0007] Preferably, a rotating hand wheel is fixedly connected to the surface of the threaded rod, and a first gear is fixedly connected to the surface of the threaded rod.

[0008] Preferably, the supporting structure includes a worm gear reducer, a connecting shaft, a first mounting plate and a first motor, the output end of the first motor is connected to the input end of the worm gear reducer, the connecting shaft is installed on the output end of the worm gear reducer, and the other end is connected to the first support plate or the second support plate, the first mounting plate is located on the surface of the worm gear reducer, the first motor is installed on the upper surface of the first mounting plate, the lower surface of the worm gear reducer is fixedly connected to the third support plate, the inner side of the third support plate is movably connected to the first electric push rod, one side of the worm gear reducer is fixedly connected to the second mounting plate, the lower surface of the second mounting plate is fixedly installed with the second motor, the output end of the second motor is fixedly installed with a second gear, and the second gear is meshed with the first gear.

[0009] Preferably, one end of the second support plate is fixedly connected to the cross rod.

[0010] Preferably, the number of the threaded rods and the number of the first moving blocks are both two and they are symmetrically distributed.

[0011] Preferably, the first clamps and the second clamps are arranged in a circular array and their positions are staggered with each other, and the overall position is in a "R" shape.

[0012] Preferably, the positions of the first connection seat, the second connection seat and the fourth connection seat are in a straight line, and the positions of the first connection seat, the third connection seat and the fifth connection seat are the same.

[0013] Preferably, a fourth support plate is fixedly connected to the bottom of the first electric push rod, and a second electric push rod is fixedly connected to the inner side of the fourth support plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The gearbox housing processing and positioning tooling can drive the first moving block to translate when it rotates through the setting of the threaded rod. The translation of the first moving block can respectively drive the second moving block and the third moving block to translate through the first connecting rod and the second connecting rod, which is conducive to the second moving block and the third moving block respectively driving the first clamp and the second clamp to change the angle, which can facilitate the first clamp and the second clamp to expand or contract. Since the surface of the gearbox housing is generally provided with circular holes with different functions, the first clamp and the second clamp can pass through the circular holes and then be expanded. The side surfaces of the expanded first clamp and the second clamp can be buckled on the edge of the circular hole. The directions of the first clamp and the second clamp are opposite and distributed in a "rice" shape, which is conducive to forming a stable clamping fixation from the edge of the circular hole of the gearbox housing. The anti-slip grooves on the sides of the first clamp and the second clamp are conducive to improving friction.

[0015] 2. The gearbox housing processing and positioning tooling adjusts the first clamp and the second clamp to present different angles, so as to facilitate adaptation to circular holes of different sizes on the gearbox housing. For larger circular holes, the first clamp and the second clamp can be passed through the circular hole first and then unfolded to be fixed by reverse buckling. For smaller circular holes, the first clamp and the second clamp can be directly unfolded for direct push buckling and fixing. When the edge of the circular hole is chamfered, the first clamp and the second clamp can be passed through the circular hole first and then unfolded, and the inclination angle of the first clamp and the second clamp is made the same as the angle of the chamfered part and then buckled and fixed.

[0016] 3. The gearbox housing processing and positioning tooling can easily drive the gearbox housing body to rotate through the rotation of the worm gear reducer, and can easily drive the gearbox housing body to present an inclined state of left high and right low or left low and right high through the first electric push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention, which are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation of the present invention. In the drawings: Figure 1 It is a complete structural schematic diagram of the present invention; Figure 2 It is a front view of the present invention; Figure 3 This is a structural diagram of the present invention from the bottom perspective; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 For the present invention Figure 1 Enlarged view of point B in the middle; Figure 6 is a cross-sectional view of the present invention; Figure 7 This is a second morphological structure diagram of the present invention; Figure 8 This is a third structural diagram of the present invention.

[0018] In the figure: 1, gearbox housing body; 2, positioning tool body; 201, first support plate; 202, second support plate; 203, support guide rod; 204, cross groove; 205, cross rod; 206, second bearing; 207, threaded rod; 208, first moving block; 209, first connecting seat; 210, second moving block; 211, second connecting seat; 212, first connecting rod; 213, third moving block; 214, third connecting seat; 215, second connecting rod; 216, fourth connecting seat; 217, first fixture ; 218, third connecting rod; 219, fifth connecting seat; 220, second clamp; 221, fourth connecting rod; 222, rotating hand wheel; 223, first gear; 224, first bearing; 3, supporting structure; 301, worm gear reducer; 302, connecting shaft; 303, first mounting plate; 304, first motor; 305, third supporting plate; 306, second electric push rod; 307, first electric push rod; 308, second mounting plate; 309, second motor; 310, second gear; 311, fourth supporting plate. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 6 The present invention provides the following technical solutions: a gearbox housing machining positioning tool, comprising a gearbox housing body 1, a positioning tool body 2 and a supporting structure 3, the positioning tool body 2 comprises a first supporting plate 201 and a second supporting plate 202, a supporting guide rod 203 is fixedly connected to the upper surface of the first supporting plate 201, a cross groove 204 is provided inside the supporting guide rod 203, a cross rod 205 is slidably connected to the inside of the cross groove 204, a first bearing 224 is embedded in the inner side of the first supporting plate 201 and the second supporting plate 202, a second bearing 206 is installed at the end of the supporting guide rod 203 and the cross rod 205, a threaded rod 207 is fixedly connected to the inner wall of the first bearing 224 and the second bearing 206, a first moving block 208 is threadedly connected to the surface of the threaded rod 207, a first connecting seat 209 is fixedly installed on one side of the first moving block 208, a second moving block 210 is slidably installed on the surface of the supporting guide rod 203, and a second moving block 210 is fixedly installed on the surface of the second moving block 210 A second connecting seat 211 is fixedly connected, and the first connecting seat 209 and the second connecting seat 211 are both movably connected with the first connecting rod 212. A third moving block 213 is slidably installed on the surface of the cross rod 205, and the surface of the third moving block 213 is fixedly connected with the third connecting seat 214. The first connecting seat 209 and the third connecting seat 214 are both movably connected with the second connecting rod 215. The surface of the supporting guide rod 203 is fixedly connected with the fourth connecting seat 216, and the surface of the fourth connecting seat 216 is movably installed with the first clamp 217. The first clamp 217 and the second connecting seat 211 are both movably connected with the third connecting rod 218. The surface of the cross rod 205 is fixedly connected with the fifth connecting seat 219, and the surface of the fifth connecting seat 219 is movably installed with the second clamp 220. The second clamp 220 and the third connecting seat 214 are both movably connected with the fourth connecting rod 221. Anti-slip grooves are provided on both sides of the first clamp 217 and the second clamp 220.

[0021] In this embodiment, the threaded rod 207 is arranged so that it can drive the first moving block 208 to translate when it rotates. The translation of the first moving block 208 can respectively drive the second moving block 210 and the third moving block 213 to translate through the first connecting rod 212 and the second connecting rod 215, thereby facilitating the second moving block 210 and the third moving block 213 to respectively drive the first clamp 217 and the second clamp 220 to change their angles, which can facilitate the expansion or contraction of the first clamp 217 and the second clamp 220. Since the surface of the gearbox housing is generally provided with circular holes with different functions, the first clamp 217 and the second clamp 220 can pass through the circular holes and then expand. The side surfaces of the unfolded first clamp 217 and the second clamp 220 can be buckled on the edge of the circular hole. The first clamp 217 and the second clamp 220 are in opposite directions and are distributed in a "rice" shape, which is conducive to forming a stable clamping fixation from the edge of the circular hole of the gearbox housing. The anti-skid grooves on the sides of the first clamp 217 and the second clamp 220 are conducive to improving the friction force. By adjusting the first clamp 217 and the second clamp 220 to present different angles, it is convenient to adapt to circular holes of different sizes on the gearbox housing. For larger circular holes, the first clamp 217 and the second clamp 220 can be passed through the circular hole first and then unfolded to buckle and fix them in the opposite direction. Please refer to Figure 7 For smaller round holes, the first clamp 217 and the second clamp 220 can be directly deployed to perform a direct push buckling and fixing method. Figure 8 When the edge of the circular hole is chamfered, the first clamp 217 and the second clamp 220 can be passed through the circular hole first and then unfolded, and the inclination angle of the first clamp 217 and the second clamp 220 is made the same as the angle of the chamfered portion and then buckled and fixed.

[0022] Specifically, a rotating hand wheel 222 is fixedly connected to the surface of the threaded rod 207, and a first gear 223 is fixedly connected to the surface of the threaded rod 207. By rotating the hand wheel 222, the staff can manually rotate it to drive the threaded rod 207 to perform fine-tuning rotation, and the first gear 223 can engage with the second gear 310.

[0023] Specifically, the support structure 3 includes a worm gear reducer 301, a connecting shaft 302, a first mounting plate 303 and a first motor 304. The output end of the first motor 304 is connected to the input end of the worm gear reducer 301. The connecting shaft 302 is installed at the output end of the worm gear reducer 301, and the other end is connected to the first support plate 201 or the second support plate 202. The first mounting plate 303 is located on the surface of the worm gear reducer 301. The first motor 304 is installed on the upper surface of the first mounting plate 303. The first mounting plate 303 can provide a mounting position for the first motor 304. The worm gear reducer 301 is set up, the first motor 304 drives the internal worm to rotate, and the internal worm and the turbine are meshed to achieve the effect of speed reduction and torque increase, and the internal turbine drives the connecting shaft 302 to rotate, and the rotation of the connecting shaft 302 can drive the first support plate 201 or the second support plate 202 to form a slow rotation, so as to facilitate the adjustment of the angle of the gearbox housing body 1 and the processing of the gearbox housing body 1. In addition, the worm gear reducer 301 also has a self-locking function, so as to facilitate the fixing of the angle of the gearbox housing body 1. The lower surface is fixedly connected with a third support plate 305, and the third support plate 305 is convenient for the top end of the first electric push rod 307 to be movably connected. The inner side of the third support plate 305 is movably connected with the first electric push rod 307. The first electric push rod 307 can not only play a secondary supporting role, but also its telescopic end can be telescoped to facilitate the adjustment of the inclination of the positioning tool body 2. There are four first electric push rods 307, two in a group and symmetrically distributed. During operation, one group pushes upward and the other group pulls downward, thereby realizing a left high and right low or a left low and right high state. In addition, the four first electric push rods 307 are synchronously extended. The height of the positioning tool body 2 can be conveniently adjusted during compression. A second mounting plate 308 is fixedly connected to one side of the worm gear reducer 301. The second mounting plate 308 facilitates the installation of a second motor 309. A second motor 309 is fixedly installed on the lower surface of the second mounting plate 308. A second gear 310 is fixedly installed on the output end of the second motor 309. The second gear 310 is meshed with the first gear 223. The output end of the second motor 309 can drive the second gear 310 to rotate, and the second gear 310 can drive the first gear 223 to rotate, so that the threaded rod 207 can rotate forward or reverse.

[0024] Specifically, one end of the second support plate 202 is fixedly connected to the cross rod 205 , so that the cross rod 205 can be driven to rotate synchronously with the second support plate 202 by the worm gear reducer 301 .

[0025] Specifically, there are two threaded rods 207 and two first movable blocks 208 and they are symmetrically distributed, which is conducive to driving the first clamp 217 and the second clamp 220 to change their angles respectively. The first clamp 217 and the second clamp 220 change their angles separately to better adapt to the edge of the circular hole of the gearbox housing.

[0026] Specifically, the first clamp 217 and the second clamp 220 are arranged in a circular array and their positions are staggered with each other. The overall position is in a "rice" shape, which can facilitate the first clamp 217 and the second clamp 220 to play a better fixing role and improve the stability of the gearbox housing body 1.

[0027] Specifically, the positions of the first connecting seat 209, the second connecting seat 211 and the fourth connecting seat 216 are in a straight line, so it is convenient to install the first connecting rod 212 and the third connecting rod 218. The positions of the first connecting seat 209, the third connecting seat 214 and the fifth connecting seat 219 are similar, which can facilitate the installation of the second connecting rod 215 and the fourth connecting rod 221.

[0028] Specifically, the bottom of the first electric push rod 307 is fixedly connected to the fourth support plate 311, and the fourth support plate 311 facilitates the installation of the first electric push rod 307 and the second electric push rod 306. The inner side of the fourth support plate 311 is fixedly connected to the second electric push rod 306. Through the setting of the second electric push rod 306, the telescopic end thereof can be telescoped to facilitate the translation of the support structure 3 and the positioning tool body 2, which is beneficial to adjust the distance and position between the left and right sides of the support structure 3 and the positioning tool body 2.

[0029] The working principle or use process of the present invention: When the present invention is in use, the second electric push rod 306 needs to be fixedly installed first, and then the gearbox housing body 1 can be lifted by a lifting device or manually. Then, the second electric push rod 306 can be controlled to start adjusting the spacing between the left and right positioning tooling bodies 2 and the supporting structure 3. At the same time, the four first electric push rods 307 need to be controlled to synchronously extend and retract to adjust the height of the positioning tooling body 2. The support guide rod 203 and the cross rod 205 need to coincide with the circular hole position on the surface of the gearbox housing. Then, the threaded rod 207 can be rotated. There are two ways to rotate the threaded rod 207. One is to drive the threaded rod 207 to rotate manually by turning the hand wheel 222. The other is to control the second motor 309 to drive the second gear 310 to rotate. The second gear 310 then drives the first gear 223 to rotate to rotate the threaded rod 207. When the threaded rod 207 rotates, it can drive the first moving block 208 to translate. The translation of the first moving block 208 can drive the second moving block 208 to translate through the first connecting rod 212 and the second connecting rod 215 respectively. 210 and the third moving block 213 are translated, which is conducive to the second moving block 210 and the third moving block 213 respectively driving the first clamp 217 and the second clamp 220 to change their angles, which can facilitate the first clamp 217 and the second clamp 220 to expand or contract. Since the surface of the gearbox housing is generally provided with round holes with different functions, the first clamp 217 and the second clamp 220 can pass through the round holes and then expand. The side surfaces of the expanded first clamp 217 and the second clamp 220 can be pressed at the edge of the round hole. The first clamp 217 and the second clamp 220 are pressed against the edge of the round hole. The first clamp 217 and the second clamp 220 are arranged in opposite directions and in a "rice" shape, which is conducive to forming a stable clamping fixation from the edge of the round hole of the gearbox housing. The anti-skid grooves on the sides of the first clamp 217 and the second clamp 220 are conducive to improving the friction force. By adjusting the first clamp 217 and the second clamp 220 to present different angles, it is convenient to adapt to the round holes of different sizes on the gearbox housing. For larger round holes, the first clamp 217 and the second clamp 220 can be passed through the round hole first and then unfolded to fix them in reverse. Please refer to Figure 7 For smaller round holes, the first clamp 217 and the second clamp 220 can be directly deployed to perform a direct push buckling and fixing method. Figure 8When the edge of the circular hole is chamfered, the first clamp 217 and the second clamp 220 can be passed through the circular hole first and then unfolded. The first clamp 217 and the second clamp 220 are made to have the same inclination angle as the chamfered portion and then buckled and fixed. Then, the first motor 304 can be controlled to start. The first motor 304 drives the internal worm of the worm gear reducer 301 to rotate, and the internal worm and the turbine are meshed to achieve the effect of speed reduction and torque increase. The internal turbine drives the connecting shaft 302 to rotate, and the connecting shaft 302 The rotation can also drive the first support plate 201 or the second support plate 202 to form a slow rotation, so as to facilitate the adjustment of the angle of the gearbox housing body 1. In addition, the worm gear reducer 301 also has a self-locking function, so as to facilitate the fixing of the angle of the gearbox housing body 1. The two groups of first electric push rods 307 can also be controlled to push one group upward and the other group downward to achieve the state of the gearbox housing body 1 being higher on the left and lower on the right or lower on the left and higher on the right. Among them, the electrical equipment in this device are all externally powered and the operation and shutdown are controlled by the matching control switch.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gearbox housing machining positioning tool, comprising a gearbox housing body (1), a positioning tool body (2) and a supporting structure (3), characterized in that: The positioning tool body (2) comprises a first support plate (201) and a second support plate (202); a support guide rod (203) is fixedly connected to the upper surface of the first support plate (201); a cross groove (204) is provided inside the support guide rod (203); a cross rod (205) is slidably connected inside the cross groove (204); first bearings (224) are embedded in the inner sides of the first support plate (201) and the second support plate (202); and the ends of the support guide rod (203) and the cross rod (205) are A second bearing (206) is installed, the inner walls of the first bearing (224) and the second bearing (206) are fixedly connected with a threaded rod (207), the surface of the threaded rod (207) is threadedly connected with a first moving block (208), one side of the first moving block (208) is fixedly installed with a first connecting seat (209), the surface of the support guide rod (203) is slidably installed with a second moving block (210), the surface of the second moving block (210) is fixedly connected with a second connecting seat (211), the first connecting seat (209) The first connecting rod (212) is movably connected to the interior of the cross rod (205) and the second connecting seat (211); a third moving block (213) is slidably mounted on the surface of the cross rod (205); a third connecting seat (214) is fixedly connected to the surface of the third moving block (213); the second connecting rod (215) is movably connected to the interior of the first connecting seat (209) and the third connecting seat (214); a fourth connecting seat (216) is fixedly connected to the surface of the support guide rod (203); and the fourth connecting seat (216) is movably mounted on the surface of the cross rod (205). A first clamp (217) is provided, wherein the first clamp (217) and the second connecting seat (211) are both movably connected to a third connecting rod (218), the surface of the cross rod (205) is fixedly connected to a fifth connecting seat (219), the surface of the fifth connecting seat (219) is movably mounted with a second clamp (220), the second clamp (220) and the third connecting seat (214) are both movably connected to a fourth connecting rod (221), and anti-slip grooves are provided on both sides of the first clamp (217) and the second clamp (220).

2. A gearbox housing machining and positioning tool according to claim 1, characterized in that: A rotating hand wheel (222) is fixedly connected to the surface of the threaded rod (207), and a first gear (223) is fixedly connected to the surface of the threaded rod (207).

3. A gearbox housing machining and positioning tool according to claim 2, characterized in that: The support structure (3) comprises a worm gear reducer (301), a connecting shaft (302), a first mounting plate (303) and a first motor (304); the output end of the first motor (304) is connected to the input end of the worm gear reducer (301); the connecting shaft (302) is mounted on the output end of the worm gear reducer (301), and the other end is connected to the first support plate (201) or the second support plate (202); the first mounting plate (303) is located on the surface of the worm gear reducer (301); and the first motor (304) is mounted on the first mounting plate (304). 03), a third support plate (305) is fixedly connected to the lower surface of the worm gear reducer (301), a first electric push rod (307) is movably connected to the inner side of the third support plate (305), a second mounting plate (308) is fixedly connected to one side of the worm gear reducer (301), a second motor (309) is fixedly mounted on the lower surface of the second mounting plate (308), a second gear (310) is fixedly mounted on the output end of the second motor (309), and the second gear (310) is meshed with the first gear (223).

4. The gearbox housing machining and positioning tool according to claim 1, characterized in that: One end of the second support plate (202) is fixedly connected to the cross rod (205).

5. The gearbox housing machining and positioning tool according to claim 1, characterized in that: The number of the threaded rods (207) and the number of the first moving blocks (208) are both two and they are symmetrically distributed.

6. The gearbox housing machining and positioning tool according to claim 1, characterized in that: The first clamp (217) and the second clamp (220) are arranged in a circular array and their positions are staggered, with the overall position forming a "R" shape.

7. The gearbox housing machining and positioning tool according to claim 1, characterized in that: The positions of the first connecting seat (209), the second connecting seat (211) and the fourth connecting seat (216) are in a straight line, and the positions of the first connecting seat (209), the third connecting seat (214) and the fifth connecting seat (219) are similar.

8. The gearbox housing machining and positioning tool according to claim 3, characterized in that: The bottom of the first electric push rod (307) is fixedly connected to a fourth support plate (311), and the inner side of the fourth support plate (311) is fixedly connected to a second electric push rod (306).

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