Combined clamp for machining automobile transmission gear

Abstract

The invention relates to the technical field of automobile transmission gear machining, and discloses a combined clamp for automobile transmission gear machining, which comprises a base, and further comprises three clamping plates arranged above the base and used for clamping and fixing a transmission gear; the three sliding rods are connected to the bottoms of the clamping plates and used for providing supporting force for the clamping plates; the disc is arranged above the base; the three first sliding grooves are formed in the disc in a penetrating mode and used for limiting movement of the sliding rods. The support is connected between the base and the disc and used for providing supporting force for the disc; the hydraulic motor is connected to the upper portion of the base, and through mutual cooperation of the telescopic rod, the circular plate, the first spring, the knocking hammer and the oval inclined groove, when the rotary disc drives the telescopic rod to rotate, the knocking hammer repeatedly moves up and down under limitation of the oval inclined groove and knocks the bottom of the gearbox gear; and the generated vibration can efficiently shake off dust and scrap iron attached to the surface of the gear.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile gearbox gear machining, in particular to a combined clamp for automobile gearbox gear machining. BACKGROUND

[0002] In the automobile manufacturing industry, the machining precision and efficiency of the gearbox gear play a key role in the performance of the automobile transmission system. The combined clamp is widely used in the machining of gearbox gears due to its high flexibility, reusability and other advantages. During the pre-production, transportation and storage of the gears, dust and iron filings are easily attached to the surface of the gears.

[0003] According to the patent "CN112958854B", a combined clamp for automobile gearbox gear machining is disclosed, which comprises a clamping platform, a circular ring body connected to the upper end face of the clamping platform, a drive disc connected to the clamping platform inside the circular ring body through a shaft, a drive groove provided on the drive disc, a top column connected to the drive groove through a shaft, a positioning block connected to one end of the top column, a centering screw connected to the lower end face of the clamping platform, a centering handle connected to one end of the centering screw, a connecting block connected to the other end of the centering screw, and a drive plate connected to the lower end of the connecting shaft of the drive disc. The combined clamp for automobile gearbox gear machining can conveniently self-center the gear clamping, thereby quickly and accurately clamping the gear workpiece, and can conveniently switch the gear clamping in both directions, thereby clamping and machining the inner or outer ring of the gear, and can improve the stability of the gear clamping, thereby improving the machining precision of the gear.

[0004] The above-mentioned patent can switch two sets of clamping plates to clamp and fix the gear according to the machining needs, but the dust and iron filings attached to the surface of the gear will cause uneven distribution of clamping force, which will cause the gear to easily deviate and slip during machining, thereby affecting the machining precision. Therefore, a combined clamp for automobile gearbox gear machining is proposed to solve the above-mentioned problems. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a combined clamp for automobile gearbox gear machining to solve the above-mentioned problems in the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present application is as follows: a combined clamp for automobile gearbox gear machining, comprising a base, further comprising: three clamping plates arranged above the base for clamping and fixing the gearbox gear; three slide rods connected to the bottom of the clamping plate for providing support force to the clamping plate; a disc arranged above the base; Three first sliding grooves are arranged on the disc and used for limiting the movement of the sliding rods; A support is connected between the base and the disc and used for providing a supporting force for the disc; A hydraulic motor is arranged above the base; A rotating disc is connected with the top output end of the hydraulic motor through a shaft coupling; Three second sliding grooves are arranged on the top of the rotating disc and used for limiting the movement of the sliding rods; A vibrating mechanism is arranged between the disc and the rotating disc and used for generating vibration to shake off the dust and iron filings adhered to the surface of the gearbox gear; The bottom ends of the three sliding rods are respectively slidably connected in the three second sliding grooves, and the middle portions of the three sliding rods are respectively slidably penetrated through the three first sliding grooves.

[0007] Preferably, the vibrating mechanism comprises an extension rod, a circular plate, a first spring, two knocking hammers and an oval chute. The bottom end of the extension rod is connected with the top of the rotating disc, the circular plate is connected with the top end of the extension rod, the first spring is sleeved on the outside of the extension rod, the bottom end of the first spring is connected with the rotating disc, the top end of the first spring is connected with the circular plate, the two knocking hammers are connected with the top of the circular plate, and the knocking hammers are in contact with the bottom of the gearbox gear.

[0008] Preferably, the oval chute is arranged on the top of the disc, the bottom area of the oval chute is larger than the top area, the inner wall of the oval chute is provided with fur, the knocking hammers are made of rubber, and the knocking hammers are slidably connected with the inner wall of the oval chute.

[0009] Preferably, a dust collection mechanism is arranged on the clamping plate, the dust collection mechanism comprises a curved sliding groove, the curved sliding groove is arranged on the top of the disc, a third sliding block is slidably connected in the curved sliding groove, a bent rod is connected with the top of the third sliding block, a second spring is connected between the bent rod and the clamping plate, a fourth sliding groove is arranged on the top of the clamping plate, a fourth sliding block is slidably connected in the fourth sliding groove, and the fourth sliding block is connected with the top end of the bent rod.

[0010] Preferably, a straight pipe is rotatably connected with the fourth sliding block, a dust collection hopper is connected with the other end of the straight pipe away from the fourth sliding block, a dust collector is connected with the clamping plate, a hose is connected with the top end of the dust collector, the top end of the hose is penetrated through the fourth sliding block and rotatably connected with the other end of the straight pipe away from the dust collection hopper, and the dust and iron filings adhered to the surface of the gearbox gear are sucked away through the dust collection hopper, the hose, the straight pipe and the dust collection hopper.

[0011] Preferably, the clamping plate is connected with a rack, the dust suction hopper is connected with a gear ring outside, the gear ring is engaged with the rack, and the dust suction hopper rotates under the action of the gear ring and the rack while moving left and right, the fourth sliding block is fixedly connected with a brush plate through a connecting rod, the brush plate is in contact with the inner wall of the dust suction hopper, the surface of the brush plate is attached with a dust-free cloth, and the dust and iron filings attached to the inner wall of the dust suction hopper are removed through the brush plate and the dust-free cloth, so that the cleaning effect of the dust suction hopper on the dust and iron filings attached to the surface of the gearbox gear is further improved.

[0012] Preferably, the cleaning mechanism is arranged on the rotating disc, the cleaning mechanism comprises a gas pump, the gas pump is fixedly connected to the bottom of the rotating disc, two side gas outlet ends of the gas pump are connected with a bend pipe, the other end of the bend pipe away from the gas pump is fixedly connected with a first gas pipe, the bottom end of the first gas pipe penetrates the rotating disc, the first gas pipe is sleeved with a second gas pipe inside, the disc is provided with an annular limiting groove penetratingly arranged, the top end of the second gas pipe penetrates the annular limiting groove and is fixedly connected with a gas nozzle, and the gas pump, the bend pipe, the first gas pipe, the second gas pipe and the gas nozzle are matched with each other to spray gas flow on the gearbox gear, so that the dust and iron filings attached to the surface of the gearbox gear are blown off by the gas flow.

[0013] Preferably, the middle part of the first gas pipe is rotationally connected with an eccentric wheel through a rotating rod, the eccentric wheel is in contact with the top of the disc, the rotating disc drives the first gas pipe and the second gas pipe to rotate, the second gas pipe drives the eccentric wheel to rotate through the rotating rod in the process of rotating, and the eccentric wheel repeatedly lifts the second gas pipe and the gas nozzle in the process of rotating, so that the gas nozzle moves up and down reciprocatingly while rotating around the gearbox gear, and the cleaning effect of the dust and iron filings attached to the surface of the gearbox gear is improved.

[0014] Preferably, the gas nozzle is provided with a fifth sliding groove, the fifth sliding groove is slidably connected with a spoiler through a fifth sliding block, the bottom of the spoiler is fixedly connected with two push plates, and the eccentric wheel is arranged between the two push plates. In the process of rotating of the eccentric wheel, the two push plates and the spoiler are repeatedly pushed to move left and right reciprocatingly, the originally relatively stable gas flow is disturbed through the moving spoiler, the gas flow forms a more complex flow field, more turbulence and vortex are generated. These turbulence and vortex can enhance the disturbance effect on the dust, so that the dust is more easily separated from the surface of the object.

[0015] The above technical scheme can bring the following beneficial effects: 1. The invention is provided with a vibration mechanism, through the cooperation of telescopic rod, circular plate, first spring, knocking hammer and oval chute, when the rotating disc drives the telescopic rod to rotate, the knocking hammer moves up and down repeatedly under the restriction of the oval chute, and knocks the bottom of the gearbox gear, the vibration generated can efficiently shake off the dust and iron filings attached to the gear surface. The friction between the knocking hammer made of rubber material and the inner wall of the oval chute will generate static electricity, forming an electrostatic field around the knocking hammer. The tiny particles such as dust and iron filings are polarized under the action of the electrostatic field, and static attraction is generated between them and the knocking hammer, which makes the dust and iron filings that are difficult to shake off or reattach after shaking off can be more effectively adsorbed by the knocking hammer, further improving the cleaning effect of dust and iron filings, ensuring that the impurities on the gear surface are more thoroughly removed.

[0016] 2. The invention is provided with a dust collection mechanism, through the cooperation of curved chute, third sliding block, bent rod and second spring, when the clamping plate moves, it drives the fourth sliding block and dust collector to move left and right, and performs comprehensive and meticulous dust collection work on the surface of the gearbox gear, efficiently completing the work of sucking off the dust and iron filings shaken off, greatly reducing the residue of dust and iron filings in the working area. The tooth ring outside the dust collector and the rack on the clamping plate are meshed with each other, so that the dust collector will rotate while moving left and right. The brush plate connected to the dust collector can continuously clean the inner wall of the dust collector during the rotation of the dust collector, and the dust-free cloth attached to the surface of the brush plate can effectively remove the impurities adsorbed on the inner wall of the dust collector, avoiding the accumulation of impurities affecting the dust collection effect, thereby further improving the cleaning effect of the dust collector on dust and iron filings and ensuring the efficiency and durability of the dust collection work.

[0017] 3. The invention is provided with a cleaning mechanism, through the cooperation of air pump, elbow, first air pipe, second air pipe and air jet nozzle, the strong airflow generated by the air pump is transmitted through a series of pipelines and finally sprayed out of the air jet nozzle, which can effectively blow off the dust and iron filings attached to the surface of the gearbox gear, realizing the preliminary airflow cleaning of the gear surface. When the rotating disc drives the first air pipe and the second air pipe to rotate, the eccentric wheel rotates and repeatedly lifts the second air pipe and the air jet nozzle, so that the air jet nozzle moves up and down repeatedly while rotating around the gearbox gear, expanding the range of airflow and making the cleaning more comprehensive. In addition, the eccentric wheel drives the spoiler to move left and right repeatedly, disrupting the original smooth airflow and making the airflow form a complex flow field, generating a large amount of turbulence and vortex. These turbulence and vortex greatly enhance the disturbance effect on dust, making it easier for dust to detach from the gear surface, further improving the cleaning effect of dust and iron filings on the surface of the gearbox gear and ensuring that the gear reaches a higher cleaning standard before processing. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The overall structure of the invention is shown in the figure; Figure 2 is the exploded view of the present application; Figure 3 is the first cross-sectional structure schematic view of the disc area in the present application; Figure 4 is the enlarged view of the A area in the present application; Figure 3 Figure 5 is the structure schematic view of the clamping plate area in the present application; Figure 6 is the enlarged view of the B area in the present application; Figure 5 Figure 7 is the second cross-sectional structure schematic view of the disc area in the present application; Figure 8 is the first cross-sectional structure schematic view of the first air pipe area in the present application.

[0019] In the figure: 1, base; 21, clamping plate; 22, slide bar; 23, disc; 24, first sliding groove; 25, support; 26, hydraulic motor; 27, rotating disc; 28, second sliding groove; 3, vibration mechanism; 31, telescopic rod; 32, circular plate; 33, first spring; 34, knocking hammer; 35, oval inclined chute; 4, dust suction mechanism; 41, curved sliding groove; 42, third sliding block; 43, bent rod; 44, second spring; 45, fourth sliding groove; 46, fourth sliding block; 47, dust collector; 48, straight pipe; 49, dust suction hopper; 410, gear ring; 411, rack; 412, brush plate; 5, cleaning mechanism; 51, air pump; 52, elbow; 53, first air pipe; 54, second air pipe; 55, annular limiting groove; 56, air jet nozzle; 57, spoiler; 58, eccentric wheel; 59, push plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0021] Please refer to Figures 1-8 , one embodiment of the present application is: a combined fixture for machining automobile gearbox gears, comprising a base 1, further comprising: three clamping plates 21 arranged above the base 1 for clamping and fixing the gearbox gears; three slide bars 22 connected at the bottom of the clamping plates 21 for providing support force to the clamping plates 21; a disc 23 arranged above the base 1; ​​Three first sliding grooves 24 are arranged through the disc 23, and are used for limiting the movement of the slide rods 22; A support 25 is connected between the base 1 and the disc 23, and is used for providing a supporting force for the disc 23; A hydraulic motor 26 is connected above the base 1; A rotating disc 27 is connected with the top output end of the hydraulic motor 26 through a shaft coupling; Three second sliding grooves 28 are arranged on the top of the rotating disc 27, and are used for limiting the movement of the slide rods 22; A vibrating mechanism 3 is arranged between the disc 23 and the rotating disc 27, and is used for generating vibration to shake off the dust and iron filings adhered to the surface of the gearbox gear; The bottom ends of the three slide rods 22 are respectively slidably connected in the three second sliding grooves 28, and the middle portions of the three slide rods 22 are respectively slidably arranged through the three first sliding grooves 24.

[0022] The vibrating mechanism 3 comprises an extension rod 31, a circular plate 32, a first spring 33, two knocking hammers 34 and an oval inclined groove 35. The bottom end of the extension rod 31 is connected with the top of the rotating disc 27, the circular plate 32 is connected with the top end of the extension rod 31, the first spring 33 is sleeved outside the extension rod 31, the bottom end of the first spring 33 is connected with the rotating disc 27, the top end of the first spring 33 is connected with the circular plate 32, the two knocking hammers 34 are connected with the top of the circular plate 32, and the knocking hammers 34 are in contact with the bottom of the gearbox gear.

[0023] The oval inclined groove 35 is arranged through the top of the disc 23, the bottom area of the oval inclined groove 35 is larger than the top area, the inner wall of the oval inclined groove 35 is provided with fur, the knocking hammers 34 are made of rubber, and the knocking hammers 34 are slidably connected with the inner wall of the oval inclined groove 35.

[0024] Working principle: first, the gearbox gear to be processed is placed on the disc 23, then the hydraulic motor 26 is started to drive the rotating disc 27 to rotate, the rotating disc 27 drives the three sliding rods 22 to shrink inward under the limiting action of the first sliding groove 24 and the second sliding groove 28, the three sliding rods 22 shrink inward to drive the three clamping plates 21 to shrink inward and clamp and fix the gearbox gear. The rotating disc 27 drives the telescopic rod 31 to rotate, the telescopic rod 31 drives the circular plate 32 to rotate, the circular plate 32 drives the two knocking hammers 34 to rotate, the two knocking hammers 34 rotate and repeatedly move up and down under the limiting action of the inner wall of the oval chute 35, the knocking hammers 34 move upward and knock the bottom of the gearbox gear, and vibration is generated, which shakes off the dust and iron filings attached to the surface of the gearbox gear. When the knocking hammer 34 made of rubber slides in the oval chute 35, it contacts and rubs the fur, thereby generating static electricity, which charges the surface of the knocking hammer 34, thereby forming an electrostatic field around it. The dust and iron filings are polarized under the action of the electrostatic field and generate induced charges. The knocking hammer 34 with static electricity and the polarized dust and iron filings generate electrostatic attraction, which makes the dust and iron filings more easily attached to the surface of the knocking hammer 34, thereby improving the cleaning effect of the dust and iron filings.

[0025] Please refer to Figures 1-8 On the basis of the above embodiment, in another embodiment of the present application, the clamping plate 21 is provided with a dust collection mechanism 4, the dust collection mechanism 4 includes a curved sliding groove 41, the curved sliding groove 41 is opened at the top of the disc 23, the third sliding block 42 is slidably connected in the curved sliding groove 41, the top of the third sliding block 42 is connected with a bent rod 43, the bent rod 43 is connected with the clamping plate 21 through the second spring 44, the fourth sliding groove 45 is opened at the top of the clamping plate 21, the fourth sliding block 46 is slidably connected in the fourth sliding groove 45, and the top of the fourth sliding block 46 is connected with the top end of the bent rod 43. Under the action of the curved sliding groove 41, the third sliding block 42, the bent rod 43 and the second spring 44, the fourth sliding block 46 and the dust collection hopper 49 move left and right reciprocally during the movement of the clamping plate 21.

[0026] The fourth sliding block 46 is rotatably connected with a straight pipe 48, the other end of the straight pipe 48 away from the fourth sliding block 46 is connected with the dust collection hopper 49, the clamping plate 21 is connected with a dust collector 47, the top end of the dust collector 47 is connected with a hose, the top end of the hose penetrates through the fourth sliding block 46 and is rotatably connected with the other end of the straight pipe 48 away from the dust collection hopper 49, and the dust and iron filings attached to the surface of the gearbox gear are sucked away through the dust collection hopper 49, the hose, the straight pipe 48 and the dust collection hopper 49.

[0027] The rack 411 is connected to the clamping plate 21, the tooth ring 410 is connected to the outside of the dust bucket 49, and the tooth ring 410 is engaged with the rack 411. When the dust bucket 49 moves left and right, the tooth ring 410 will rotate under the action of the rack 411. The brush plate 412 is fixedly connected to the fourth sliding block 46 through the connecting rod, and the brush plate 412 is in contact with the inner wall of the dust bucket 49. The dust cloth attached to the surface of the brush plate 412 removes the impurities attached to the inner wall of the dust bucket 49 through the brush plate 412 and the dust cloth, thereby further improving the cleaning effect of the dust bucket 49 on the dust and iron filings attached to the surface of the gearbox gear.

[0028] Working principle: during the inward contraction of the three clamping plates 21, the fourth sliding block 46 will move left and right reciprocatingly under the action of the fourth sliding groove 45, the curved sliding groove 41, the third sliding block 42 and the bent rod 43, and drive the straight pipe 48 and the dust bucket 49 to move left and right reciprocatingly, and remove the dust and iron filings attached to the surface of the gearbox gear through the dust bucket 49, the straight pipe 48, the hose and the dust collector 47. While the dust bucket 49 moves left and right, the tooth ring 410 will rotate under the action of the rack 411. The dust cloth attached to the surface of the brush plate 412 removes the impurities attached to the inner wall of the dust bucket 49 through the brush plate 412 and the dust cloth, thereby further improving the cleaning effect of the dust bucket 49 on the dust and iron filings attached to the surface of the gearbox gear.

[0029] Please refer to Figures 1-8 On the basis of the above embodiment, in another embodiment of the present application, the cleaning mechanism 5 is arranged on the rotating disc 27, and the cleaning mechanism 5 comprises a gas pump 51 fixedly connected to the bottom of the rotating disc 27. The two side gas outlets of the gas pump 51 are connected with bent pipes 52, the other ends of the bent pipes 52 away from the gas pump 51 are fixedly connected with first gas pipes 53, the bottom ends of the first gas pipes 53 penetrate through the rotating disc 27, the inside of the first gas pipe 53 is sleeved with a second gas pipe 54, and the top end of the second gas pipe 54 penetrates through an annular limiting groove 55 arranged on the disc 23 and is fixedly connected with a gas nozzle 56. Through the cooperation of the gas pump 51, the bent pipe 52, the first gas pipe 53, the second gas pipe 54 and the gas nozzle 56, the gas flow is sprayed to the gearbox gear, and the dust and iron filings attached to the surface of the gearbox gear are blown off by the gas flow.

[0030] The middle part of the first gas pipe 53 is rotationally connected with an eccentric wheel 58 through a rotating rod, the eccentric wheel 58 is in contact with the top of the disc 23, and the rotating disc 27 drives the first gas pipe 53 and the second gas pipe 54 to rotate, the second gas pipe 54 drives the eccentric wheel 58 to rotate through the rotating rod when rotating, and the eccentric wheel 58 repeatedly lifts the second gas pipe 54 and the gas nozzle 56 in the process of rotating, so that the gas nozzle 56 moves up and down reciprocatingly while rotating around the gearbox gear, thereby improving the cleaning effect of the dust and iron filings attached to the surface of the gearbox gear.

[0031] The fifth sliding groove is arranged on the air jet nozzle 56, the fifth sliding block is slidably connected with the spoiler 57 through the fifth sliding groove, the bottom of the spoiler 57 is fixedly connected with two push plates 59, and the eccentric wheel 58 is arranged between the two push plates 59. The eccentric wheel 58 repeatedly pushes the two push plates 59 and the spoiler 57 to move left and right during rotation, the spoiler 57 moving breaks the relatively stable airflow, so that the airflow forms a more complex flow field, and more turbulence and vortexes are generated. The turbulence and vortexes can enhance the disturbance of dust, so that the dust is more easily separated from the surface of the object.

[0032] Working principle: through the cooperation of the air pump 51, the elbow pipe 52, the first air pipe 53, the second air pipe 54 and the air jet nozzle 56, the airflow is sprayed to the gearbox gear, the dust and iron filings attached to the surface of the gearbox gear are blown off by the airflow, the first air pipe 53 and the second air pipe 54 are driven to rotate while the rotating disc 27 rotates, the second air pipe 54 is driven to rotate through the rotating rod while rotating, the second air pipe 54 and the air jet nozzle 56 are repeatedly lifted by the eccentric wheel 58 during rotation of the eccentric wheel 58, so that the air jet nozzle 56 moves up and down while rotating around the gearbox gear, thereby improving the cleaning effect of the dust and iron filings attached to the surface of the gearbox gear, the two push plates 59 and the spoiler 57 are repeatedly pushed to move left and right during rotation of the eccentric wheel 58, the spoiler 57 moving breaks the relatively stable airflow, so that the airflow forms a more complex flow field, and more turbulence and vortexes are generated. The turbulence and vortexes can enhance the disturbance of dust, so that the dust is more easily separated from the surface of the object. When the airflow blows over the knocking hammer 34, the air flows, that is, there is wind power, after the air molecules contact the surface of the charged object, some charged particles are adsorbed, the charged airflow interacts with the dust particles, so that the dust particles are charged, thereby being more easily attracted or repelled by the airflow, and the dust removal effect is improved.

[0033] The present application provides a combined clamp for machining automobile gearbox gears, and there are many methods and ways to realize the technical scheme, and the above description is only the preferred embodiment of the present application. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principle of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application. The components not explicitly described in the embodiment can be realized by the existing technology.

Claims

1. A modular fixture for machining gears in an automobile transmission, comprising a base, characterized in that: Also includes: Three clamping plates are set above the base to clamp and fix the gearbox gears; Three sliding rods are connected to the bottom of the splint to provide support for the splint; A disc is arranged above the base; Three first sliding grooves are provided on the disc to limit the movement of the slide rod; A bracket, connected between the base and the disc, for providing support to the disc; A hydraulic motor is connected to the top of the base; The turntable is connected to the top output end of the hydraulic motor through a coupling; Three second slide grooves are opened on the top of the turntable to limit the movement of the slide rod; The vibration mechanism is set between the disc and the turntable to generate vibration to shake off the dust and iron chips attached to the surface of the gearbox; The bottom ends of the three sliding rods are respectively slidably connected to the insides of the three second sliding grooves, and the middle parts of the three sliding rods are respectively slidably passed through the three first sliding grooves.

2. The combined fixture for machining automobile transmission gears according to claim 1, characterized in that: The vibration mechanism includes a telescopic rod, a circular plate, a first spring, two striking hammers, and an elliptical chute; The bottom end of the telescopic rod is connected to the top of the turntable, the circular plate is connected to the top of the telescopic rod, the first spring is sleeved on the outside of the telescopic rod, the bottom end of the first spring is connected to the turntable, the top end of the first spring is connected to the circular plate, and the two knock hammers are connected to the top of the circular plate.

3. The combined fixture for machining automobile transmission gears according to claim 2, characterized in that: The elliptical chute is opened through the top of the disc, and the bottom area of ​​the elliptical chute is larger than the top area.

4. The combined fixture for machining automobile transmission gears according to claim 3, characterized in that: A dust suction mechanism is provided on the splint, and the dust suction mechanism includes a curved slide groove, which is opened on the top of the disc, and the inner sliding connection of the curved slide groove is connected to a third slider, and the top of the third slider is connected to a bent rod, and a second spring is connected between the bent rod and the splint, and a fourth slide groove is opened on the top of the splint, and the inner sliding connection of the fourth slide groove is connected to a fourth slider, and the fourth slider is connected to the top of the bent rod.

5. The combined fixture for machining automobile transmission gears according to claim 4, characterized in that: A straight pipe is rotatably connected to the fourth slider, and the other end of the straight pipe away from the fourth slider is connected to a dust hopper. A vacuum cleaner is connected to the splint, and the top of the vacuum cleaner is connected to a hose. The top of the hose passes through the fourth slider and is rotatably connected to the other end of the straight pipe away from the dust hopper.

6. The combined fixture for machining automobile transmission gears according to claim 5, characterized in that: A rack is connected to the splint, a gear ring is connected to the outside of the dust hopper, the gear ring is engaged with the rack, a brush plate is fixedly connected to the fourth slider through a connecting rod, the brush plate contacts the inner wall of the dust hopper, and a dust-free cloth is attached to the surface of the brush plate.

7. The combined fixture for machining automobile transmission gears according to claim 6, characterized in that: The turntable is provided with a cleaning mechanism, which includes an air pump, which is fixedly connected to the bottom of the turntable, and the air outlet ends on both sides of the air pump are connected to bent pipes, and the other end of the bent pipe away from the air pump is fixedly connected to a first air pipe, the bottom end of the first air pipe passes through the turntable, and a second air pipe is sleeved inside the first air pipe. An annular limiting groove is penetrated on the disc, and the top of the second air pipe passes through the annular limiting groove and is fixedly connected to an air nozzle.

8. The combined fixture for machining automobile transmission gears according to claim 7, characterized in that: The middle part of the first air pipe is rotatably connected to an eccentric wheel through a rotating rod, and the eccentric wheel is in contact with the top of the disc.

9. The combined fixture for machining automobile transmission gears according to claim 8, characterized in that: A fifth chute is provided on the air jet nozzle, a spoiler is slidably connected to the fifth chute via a fifth slider, two push plates are fixedly connected to the bottom of the spoiler, and the eccentric wheel is arranged between the two push plates.

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