Fixing and grooving device for automobile transmission gear

Abstract

The invention relates to the technical field of gearbox gear machining, in particular to an automobile gearbox gear fixing and grooving device. The gear grooving device comprises a workbench body, the top of the workbench body is fixedly connected with a supporting circular plate, the top of the supporting circular plate is rotationally connected with a containing plate used for containing a gear, the top of the workbench body is provided with a grooving device used for machining the gear on the surface of the containing plate, and the surface of the supporting circular plate is provided with a width fixing assembly used for fixing the gear. The moving columns slide in the limiting grooves to drive the arc-shaped clamping strip fixing plates to move, the distance between the two arc-shaped clamping strip fixing plates can be flexibly adjusted, a fixing cavity capable of being matched with gears with different outer diameters is formed, the contact faces of the arc-shaped clamping strip fixing plates and the gears are in a sawtooth micro-convex shape, the friction force between the arc-shaped clamping strip fixing plates and the surfaces of the gears is increased when the arc-shaped clamping strip fixing plates make contact with the gears, and the service life of the gears is prolonged. During grooving, the sawtooth micro-protrusions are tightly attached to the gear, and radial force generated by grooving can be effectively resisted.

Description

Technical Field

[0001] The invention relates to the technical field of gearbox gear processing, in particular to a fixing and grooving device for automobile gearbox gears. Background Art

[0002] The gearbox is a very important component on the vehicle. It can change the transmission ratio and expand the torque and speed of the driving wheel. With the development of modern technology, the gearbox has also been upgraded, from the initial manual gearbox to the current continuously variable gearbox, from no synchronizer to synchronizer, and the operation is becoming more and more convenient. At present, diesel engines are widely used in construction machinery. The torque and speed variation range is small, which cannot meet the vehicle's requirements for traction and driving speed under various working conditions. Gearboxes are needed to solve this contradiction. The performance of the gearbox is the key to measuring the power, economy and driving performance of construction machinery. The important component of the gearbox is the gearbox gear. Most gear damage is caused by high contact stress and bending stress. Slotted teeth can reduce these stresses and obtain smooth operation of the machine.

[0003] A fixing and slotting device for a gear of an automobile transmission box with a Chinese patent publication number of CN110434405A comprises an operating box, an upper end of the operating box is provided with a strip opening communicating with the outside, and an upper end of the operating box is provided with a box cover matched with the strip opening, a driving motor is fixedly connected to the bottom wall of the operating box, an output end of the driving motor is movably connected with a vertically arranged mounting rod, and a gear is sleeved on the mounting rod, two symmetrically arranged telescopic mechanisms are provided on both sides of the mounting rod, and a limit plate matched with the gear is fixedly connected to the upper end of the telescopic mechanism, a cleaning mechanism and a slotting mechanism are provided on the box cover, a horizontally arranged collecting net is provided in the operating box, and the mounting rod penetrates the collecting net, the telescopic cylinder can drive the limit plate to move in the vertical direction, thereby promoting the movement of the gear, so as to facilitate the adjustment of the working position of gears of different thicknesses, thereby performing slotting processing, and the slide groove cooperates with the limit rod to make the movement state of the limit plate more stable.

[0004] When the above-mentioned device is used to groove the gear, the gear needs to be sleeved on the mounting rod to limit the gear. However, since the aperture of some gears is not consistent with the diameter of the mounting rod, the gear placed on the limit plate will be displaced in the radial direction during the groove cutting process due to external forces such as cutting force and vibration, and the gear cannot maintain a fixed position, resulting in deviation in the groove position. Summary of the invention

[0005] The object of the present invention is to provide a device for fixing and grooving gears in an automobile transmission case to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides a fixing and grooving device for automobile gearbox, comprising a workbench main body, a supporting circular plate is fixedly connected to the top of the workbench main body, a placement plate for placing gears is rotatably connected to the top of the supporting circular plate, a grooving device for processing the gears on the surface of the placement plate is arranged on the top of the workbench main body, a width fixing component for fixing the gears is arranged on the surface of the supporting circular plate, and a thickness fixing component is arranged on the top of the width fixing component; A driving assembly is provided on the top of the workbench body, and the driving assembly is used to drive the sawtooth micro-convexities on the surface of the width fixing assembly to fit with the gear, thereby increasing the friction between the two, and the width fixing assembly is used to fix gears of different sizes to cooperate with the slotting device to slot the gear; The thickness fixing component is used to cooperate with the width fixing component to move to the top of the gear, and move in the vertical direction to fit the top of the gear, and plug into the inner wall of the width fixing component. The thickness fixing component and the width fixing component are nested with each other to form a more stable connection structure; This cooperation is used to constrain the fit between the serrated micro-convexities of the width fixing component and the gear, and to limit the fit of the gear surface by the thickness fixing component in the axial direction, and to limit the displacement of the slotting device due to cutting vibration.

[0007] As a further improvement of the technical solution, the width fixing assembly includes two semicircular connecting plates fixed on the surface of the supporting circular plate, and the tops of the two semicircular connecting plates are provided with limiting grooves, and the inner walls of the limiting grooves are slidably connected with moving columns, and the tops of the moving columns are fixedly connected with arc-shaped card strip fixing plates; The contact surface between the arc-shaped clamping strip fixing plate and the gear is provided with a sawtooth micro-convex shape.

[0008] As a further improvement of the technical solution, the driving assembly includes a fixed frame fixedly connected to the top of the workbench body, and the inner cavity of the fixed frame is rotatably connected to a positive and negative threaded rod; The outer edges of the two arc-shaped clamping strip fixing plates are fixedly connected with an annular support frame, and one end of the annular support frame away from the arc-shaped clamping strip fixing plate is fixedly connected with a connecting moving rod; The inner walls of the two connecting movable rods are threadedly connected to the surfaces of the positive and negative threaded rods; When fixing the gear, the two connecting moving rods are moved closer to each other under the rotation of the positive and negative screw rods. At this time, a cavity for fixing the gear is formed between the two arc-shaped clamping strip fixing plates.

[0009] As a further improvement of the technical solution, a second drive motor is fixedly connected to the end of the fixed frame, and an output end of the second drive motor extends out of the fixed frame and is fixedly connected to the positive and negative screw rods.

[0010] As a further improvement of the technical solution, two sliding grooves are provided on the surface of the fixed frame, and the inner walls of the sliding grooves are slidably connected with connecting moving rods.

[0011] As a further improvement of the technical solution, the thickness fixing assembly includes sliding columns respectively fixedly connected to the top of the arc-shaped clamping strip fixing plate, and the surface of the sliding column is slidably connected to the arc-shaped fixing plate; The inner wall of the annular support frame is fixedly connected with a connecting frame, the inner cavity of the connecting frame is fixedly connected with a telescopic column, and the top of the telescopic column is fixedly connected with the bottom of the arc-shaped fixing plate.

[0012] As a further improvement of the technical solution, two connecting rods are fixedly connected to the bottom of the arc-shaped fixing plate, and one end of the connecting rod away from the arc-shaped fixing plate is fixedly connected to a positioning rod; The top of the positioning rod is provided with a through groove having the same diameter as the bottom of the telescopic column; The surfaces of the two semicircular connecting plates are both fixedly connected to the limiting plates, the tops of the limiting plates are provided with a plurality of positioning grooves, and the surfaces of the positioning rods are adapted to be inserted into the inner walls of the positioning grooves.

[0013] As a further improvement of the present technical solution, a rotating groove is opened on the surface of the supporting circular plate, a first driving motor is fixedly connected to the inner cavity of the workbench body, a rotating column is fixedly connected to the output end of the first driving motor, and the surface of the rotating column extends out of the rotating groove and is fixedly connected to the bottom of the placement plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the automobile gearbox gear fixing slotting device, the moving column slides in the limit slot to drive the arc-shaped card strip fixing plate to move, and the distance between the two arc-shaped card strip fixing plates can be flexibly adjusted to form a fixed cavity that can adapt to gears of different diameters; In addition, the contact surface between the arc-shaped clamping strip fixing plate and the gear is serrated and slightly convex, which increases the friction with the gear surface when in contact with the gear. When grooving, the serrated micro-convex fits tightly with the gear, which can effectively resist the radial force generated by grooving, prevent the gear from being displaced and shaking due to the force, and ensure that the gear remains stable during the processing process.

[0015] 2. In the automobile gearbox gear fixing and grooving device, the arc-shaped fixing plate is driven to move up and down by telescopic motion, which can adapt to the fixing requirements of gears of different thicknesses. The arc-shaped fixing plate can be fixedly connected to the positioning rod by setting a connecting rod, so that when the telescopic column drives the arc-shaped fixing plate to move downward, the positioning rod can move downward synchronously through the conduction of the connecting rod. At this time, the inner wall of the positioning rod will gradually separate from the surface of the telescopic rod, and adapt to the positioning groove on the limit plate to complete the close connection between the thickness fixing component and the width fixing component, thereby enhancing the overall stability.

[0016] 3. In the automobile gearbox gear fixing and grooving device, when the positioning rod and the positioning groove are plugged into place and the bottom of the arc-shaped fixing plate is in contact with the gear surface, the axial force during gear grooving can be effectively resisted to prevent displacement and ensure the grooving accuracy. As the arc-shaped fixing plate is in contact with the top of the gear, the positioning rod automatically stops moving down and is firmly plugged in, realizing automatic positioning and locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure assembly of the present invention; Figure 2 It is a schematic diagram of the overall structure of the driving assembly of the present invention; Figure 3 It is a schematic diagram of the overall front view of the present invention; Figure 4 It is a schematic diagram of the supporting circular plate structure of the present invention; Figure 5 It is a schematic diagram of the structure of the semicircular connecting plate of the present invention; Figure 6 It is a schematic diagram of the structure of the arc-shaped fixing plate of the present invention; Figure 7 For the present invention Figure 6 A is an enlarged structural diagram; Figure 8 This is a schematic diagram of the structure of the arc-shaped clip fixing plate of the present invention; Fig. 9 It is a schematic diagram of the cutaway structure of the workbench body of the present invention.

[0018] The meaning of each number in the figure is: 100, workbench body; 110, supporting circular plate; 1101, rotating groove; 120, rotating column; 130, placing plate; 140, first driving motor; 150, slotting device; 200, width fixing component; 300, thickness fixing component; 400, driving component; 210, semicircular connecting plate; 2101, limiting groove; 220, limiting plate; 2201, positioning groove; 230, moving column; 240, arc-shaped card strip fixing plate; 2401, annular support frame; 2402, connecting frame; 2403, connecting moving rod; 310, sliding column; 320, arc-shaped fixing plate; 330, telescopic column; 3301, positioning rod; 3302, connecting rod; 410, fixed frame; 4101, slide groove; 420, positive and negative threaded screws; 430, second drive motor. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1 See also Figure 1-Figure 9 As shown, this embodiment provides a device for fixing and grooving gears of a vehicle transmission, comprising a workbench body 100, a supporting circular plate 110 is fixedly connected to the top of the workbench body 100, a placement plate 130 for placing gears is rotatably connected to the top of the supporting circular plate 110, and a grooving device 150 for processing gears on the surface of the placement plate 130 is arranged on the top of the workbench body 100, characterized in that: a width fixing component 200 for fixing gears is arranged on the surface of the supporting circular plate 110, and a thickness fixing component 300 is arranged on the top of the width fixing component 200; A driving assembly 400 is disposed on the top of the workbench body 100. The driving assembly 400 is used to drive the sawtooth micro-convexities on the surface of the width fixing assembly 200 to fit with the gear, thereby increasing the friction between the two. The width fixing assembly 200 is used to fix gears of different sizes to cooperate with the slotting device 150 to slot the gear. The thickness fixing component 300 is used to cooperate with the width fixing component 200 to move to the top of the gear, and move in the vertical direction to fit the top of the gear, and plug into the inner wall of the width fixing component 200. The thickness fixing component 300 and the width fixing component 200 are nested with each other to form a more stable connection structure; This cooperation is used to constrain the fit between the serrated micro-convexities of the width fixing component 200 and the gear, and the thickness fixing component 300 is used to fit the gear surface in the axial direction to limit the displacement of the slotting device 150 due to cutting vibration; Considering that the gears need to be slotted, the gears need to be fixed first. However, since the sizes of the gears in the gearbox are not consistent, if a single-size fixing structure is used, it is difficult to meet the fixing requirements of gears of various specifications. It is very easy to cause problems such as gear displacement and shaking due to loose fixation during the slotting process, thereby affecting the slotting accuracy and quality. Therefore, the gears are placed on the surface of the placement plate 130, and then the width fixing component 200 is gradually approached to the gears on the surface of the placement plate 130 by controlling the drive component 400 to work until the serrated micro-convexities on the surface of the width fixing component 200 fit with the gears. In this process, gears of different sizes can be fixed, and the extrusion force generated by the continuous action of the drive component 400, combined with the serrated micro-convex structure on the surface of the width fixing component 200, can effectively cope with the strong vibration force generated by the slotting device 150 during the slotting process, ensuring that the gears always maintain a stable position during the entire slotting process.

[0021] And considering that it is not enough to provide radial constraints only when the width fixing component 200 fixes the gear, gears of different thicknesses may be displaced due to axial force when slotting. Therefore, the movement of the width fixing component 200 will drive the thickness fixing component 300 to move at the same time. At this time, the thickness fixing component 300 will be located above the gear. Then, the thickness fixing component 300 will move in the vertical direction to fit the top of the gear to limit the top of the gear. Moreover, when the thickness fixing component 300 is fitted on the top of the gear, it will be inserted into the inner wall of the width fixing component 200. At this time, the width fixing component 200 and the thickness fixing component 300 will be nested with each other to form a more stable connection structure to prevent the gear from shaking when being cut by the slotting device 150.

[0022] On the basis of the above, the specific structure is disclosed in detail: In order to make the sawtooth micro-convexities on the surface of the width fixing component 200 fit with the surface of the gear, the width fixing component 200 includes two semicircular connecting plates 210 fixed on the surface of the supporting circular plate 110, and the tops of the two semicircular connecting plates 210 are both provided with limiting grooves 2101, and the inner wall of the limiting groove 2101 is slidably connected with a moving column 230, and the top of the moving column 230 is fixedly connected with an arc-shaped card strip fixing plate 240; The contact surface between the arc-shaped clip fixing plate 240 and the gear is provided with a serrated micro-convex shape. When the gear needs to be fixed, as the movable column 230 slides on the inner wall of the limiting groove 2101, it can drive the two arc-shaped clip fixing plates 240 to gradually approach each other. Finally, a cavity for fixing the gear is formed between the two arc-shaped clip fixing plates 240, and the two arc-shaped clip fixing plates 240 will be in close contact with the surface of the gear, and the serrated micro-convex contact surface thereof will fit with the gear, thereby increasing the friction and effectively resisting the radial force during the grooving process.

[0023] In order to enable the moving column 230 to slide on the inner wall of the limiting groove 2101, so that the two arc-shaped card strip fixing plates 240 gradually approach each other to form a cavity that can fix the gear, it is necessary to further disclose the parts of the driving assembly 400. Therefore, the driving assembly 400 includes a fixed frame 410 fixedly connected to the top of the workbench body 100, and the inner cavity of the fixed frame 410 is rotatably connected to the positive and negative threaded rods 420; The outer edges of the two arc-shaped clamping strip fixing plates 240 are fixedly connected with an annular support frame 2401, and one end of the annular support frame 2401 away from the arc-shaped clamping strip fixing plate 240 is fixedly connected with a connecting moving rod 2403; The inner walls of the two connecting moving rods 2403 are threadedly connected to the surface of the positive and negative threaded rods 420; When fixing the gear, the two connecting moving rods 2403 approach each other under the rotation of the forward and reverse screw rods 420. At this time, a cavity for fixing the gear is formed between the two arc-shaped clamping strip fixing plates 240. Through the rotation of the forward and reverse screw rods 420, the two connecting moving rods 2403 can be threadedly connected to it and approach each other. The approach of the two connecting moving rods 2403 can drive the two annular support frames 2401 to approach, so that the serrated shapes opened by the two arc-shaped clamping strip fixing plates 240 fit the surface of the gear.

[0024] In order to make the forward and reverse screw rods 420 rotate, it is necessary to provide power to the forward and reverse screw rods 420. Therefore, a second drive motor 430 is fixedly connected to the end of the fixed frame 410, and the output end of the second drive motor 430 extends out of the fixed frame 410 and is fixedly connected to the forward and reverse screw rods 420. The operation of the second drive motor 430 can drive the forward and reverse screw rods 420 to rotate. At the same time, the rotation of the forward and reverse screw rods 420 can make the two connecting moving rods 2403 threadedly connected on the surface of the forward and reverse screw rods 420 approach each other.

[0025] In order to enable the connecting moving rod 2403 threadedly connected on the surface of the second driving motor 430 to slide horizontally when driving the forward and reverse screw rod 420 to rotate, two sliding grooves 4101 are opened on the surface of the fixed frame 410, and the connecting moving rod 2403 is slidingly connected to the inner wall of the sliding groove 4101. Through the rotation of the forward and reverse screw rod 420, the connecting moving rod 2403 can be driven to slide on the inner wall of the sliding groove 4101, so that the connecting moving rod 2403 slides horizontally and will not rotate with the rotation of the forward and reverse screw rod 420.

[0026] In order to make the thickness fixing assembly 300 fit on the surface of the gear, it is necessary to further disclose the parts of the thickness fixing assembly 300. Therefore, the thickness fixing assembly 300 includes a slide column 310 respectively fixedly connected to the top of the arc-shaped card bar fixing plate 240, and the surface of the slide column 310 is slidably connected to the arc-shaped fixing plate 320; The inner wall of the annular support frame 2401 is fixedly connected to a connecting frame 2402, an inner cavity of the connecting frame 2402 is fixedly connected to a telescopic column 330, and the top of the telescopic column 330 is fixedly connected to the bottom of the arc-shaped fixed plate 320. Through the fixed connection between the connecting frame 2402 and the annular support frame 2401, and the fixed connection of the telescopic column 330 to the inner cavity of the connecting frame 2402, the annular support frame 2401 can drive the connecting frame 2402 to move at the same time during the movement, thereby driving the telescopic column 330 to move, and the top of the telescopic column 330 is fixedly connected to the arc-shaped fixed plate 320. At this time, the telescopic column 330 can drive the arc-shaped fixed plate 320 to move downward and slide on the surface of the sliding column 310, gradually approaching the top of the gear and fitting with the top of the gear.

[0027] In order to make the telescopic column 330 plug into the width fixing assembly 200 to form a whole when driving the arc fixing plate 320 to fit on the top of the gear, two connecting rods 3302 are fixedly connected to the bottom of the arc fixing plate 320, and a positioning rod 3301 is fixedly connected to one end of the connecting rod 3302 away from the arc fixing plate 320; A through groove having the same diameter as the bottom of the telescopic column 330 is formed at the top of the positioning rod 3301; The surfaces of the two semicircular connecting plates 210 are fixedly connected to the limit plates 220. A plurality of positioning grooves 2201 are provided on the top of the limit plates 220. The surfaces of the positioning rods 3301 are adapted to be inserted into the inner walls of the positioning grooves 2201. By starting the telescopic column 330, the telescopic column 330 will work to move the arc-shaped fixing plate 320 downward. The downward movement of the arc-shaped fixing plate 320 drives the connecting rod 3302 to move downward synchronously. Since the connecting rod 3302 is fixedly connected to the positioning rod 3301, the positioning rod 3301 will move downward with the connecting rod 3302 and be adapted to be inserted into the inner walls of the positioning grooves 2201. When the telescopic column 330 drives the arc-shaped fixing plate 320 to fit on the top of the gear, the thickness fixing component 300 is tightly plugged into the width fixing component 200 to form a stable whole, which can not only resist radial vibration and cutting force during the grooving process, but also effectively prevent the displacement of the gear in the axial direction, thereby improving the fixing effect of gears of different specifications.

[0028] In order to enable the placement plate 130 to rotate on the top of the supporting circular plate 110, thereby driving the gears on its surface to move simultaneously, a rotation groove 1101 is opened on the surface of the supporting circular plate 110, and the inner cavity of the workbench body 100 is fixedly connected to the first drive motor 140, and the output end of the first drive motor 140 is fixedly connected to the rotating column 120. The surface of the rotating column 120 extends out of the rotating groove 1101 and is fixedly connected to the bottom of the placement plate 130. The operation of the first drive motor 140 can drive the rotating column 120 to rotate, and the rotation of the rotating column 120 can drive the placement plate 130 to rotate. At this time, the rotation of the placement plate 130 can cause the gears on its surface to rotate simultaneously.

[0029] In summary, the workflow of the present invention is: First, the gear is placed on the surface of the placement plate 130, and then the second drive motor 430 is driven to drive the positive and negative threaded rods 420 to rotate. At the same time, the rotation of the positive and negative threaded rods 420 can make the two connecting moving rods 2403 connected by threads on the surface of the gears approach each other, and the two connecting moving rods 2403 approach each other, which can drive the two annular support frames 2401 to approach each other. Finally, a cavity for fixing the gear is formed between the two arc-shaped card strip fixing plates 240, which is in close contact with the gear surface, and its serrated slightly convex contact surface fits with the gear to increase friction and effectively resist the radial force during the slotting process. By starting the telescopic column 330 The operation of the telescopic column 330 will cause the arc-shaped fixing plate 320 to move downward, and the downward movement of the arc-shaped fixing plate 320 will drive the connecting rod 3302 to move downward synchronously. Since the connecting rod 3302 is fixedly connected to the positioning rod 3301, the positioning rod 3301 will move downward with the connecting rod 3302. In the process of the positioning rod 3301 moving downward, its inner wall will gradually separate from the surface of the telescopic column 330. When the bottom of the arc-shaped fixing plate 320 is attached to the top of the gear, the positioning rod 3301 will fit and be inserted into the inner wall of the positioning groove 2201. At this time, the thickness fixing component 300 and the width fixing component 200 are tightly plugged into each other to form a stable whole.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fixed grooving device for automobile gearbox gears, comprising a workbench body (100), a support circular plate (110) being fixedly connected to the top of the workbench body (100), a placement plate (130) for placing gears being rotatably connected to the top of the support circular plate (110), a grooving device (150) for machining gears on the surface of the placement plate (130) being arranged on the top of the workbench body (100), characterized in that: A width fixing component (200) for fixing the gear is arranged on the surface of the supporting circular plate (110), and a thickness fixing component (300) is arranged on the top of the width fixing component (200); A driving assembly (400) is disposed on the top of the workbench body (100), and the driving assembly (400) is used to drive the sawtooth micro-convexities on the surface of the width fixing assembly (200) to fit the gears, and the width fixing assembly (200) is used to fix gears of different sizes to cooperate with the slotting device (150) to slot the gears; The thickness fixing component (300) is used to cooperate with the width fixing component (200) to move above the gear, and to move in a vertical direction to fit the top of the gear, and to be plugged into the inner wall of the width fixing component (200). The thickness fixing component (300) and the width fixing component (200) are nested with each other to form a stable connection structure. This cooperation is used to constrain the fit of the serrated micro-convexities of the width fixing component (200) with the gear, and the thickness fixing component (300) is used to fit the gear surface for position limiting in the axial direction, and to limit the displacement of the slotting device (150) due to cutting vibration.

2. The automobile gearbox gear fixing slotting device according to claim 1, characterized in that: The width fixing assembly (200) comprises two semicircular connecting plates (210) fixed on the surface of the supporting circular plate (110), the tops of the two semicircular connecting plates (210) are both provided with limiting grooves (2101), the inner walls of the limiting grooves (2101) are slidably connected to moving columns (230), and the tops of the moving columns (230) are fixedly connected to an arc-shaped clamping strip fixing plate (240); The contact surface between the arc-shaped clamping strip fixing plate (240) and the gear is provided with a sawtooth micro-convex shape.

3. The automobile gearbox gear fixing slotting device according to claim 2, characterized in that: The driving assembly (400) comprises a fixed frame (410) fixedly connected to the top of the workbench body (100), and a positive and negative threaded rod (420) is rotatably connected to the inner cavity of the fixed frame (410); The outer edges of the two arc-shaped clamping strip fixing plates (240) are fixedly connected to an annular support frame (2401), and one end of the annular support frame (2401) away from the arc-shaped clamping strip fixing plates (240) is fixedly connected to a connecting moving rod (2403); The inner walls of the two connecting movable rods (2403) are threadedly connected to the surfaces of the positive and negative threaded rods (420); When fixing the gear, the two connecting moving rods (2403) are moved closer to each other under the rotation of the positive and negative threaded rods (420), and at this time, a cavity for fixing the gear is formed between the two arc-shaped clamping strip fixing plates (240).

4. The automobile gearbox gear fixing slotting device according to claim 3, characterized in that: A second drive motor (430) is fixedly connected to the end of the fixed frame (410), and an output end of the second drive motor (430) extends out of the fixed frame (410) and is fixedly connected to the positive and negative threaded rods (420).

5. The automobile transmission gear fixing and slotting device according to claim 4, characterized in that: Two sliding grooves (4101) are provided on the surface of the fixed frame (410), and the inner wall of the sliding groove (4101) is slidably connected to a connecting moving rod (2403).

6. The automobile transmission gear fixing and slotting device according to claim 3, characterized in that: The thickness fixing assembly (300) comprises sliding columns (310) respectively fixedly connected to the top of the arc-shaped clamping strip fixing plate (240), and the surface of the sliding column (310) is slidably connected to the arc-shaped fixing plate (320); The inner wall of the annular support frame (2401) is fixedly connected to a connecting frame (2402), the inner cavity of the connecting frame (2402) is fixedly connected to a telescopic column (330), and the top of the telescopic column (330) is fixedly connected to the bottom of the arc-shaped fixing plate (320).

7. The automobile transmission gear fixing and slotting device according to claim 6, characterized in that: Two connecting rods (3302) are fixedly connected to the bottom of the arc-shaped fixing plate (320), and one end of the connecting rod (3302) away from the arc-shaped fixing plate (320) is fixedly connected to a positioning rod (3301); A through groove having the same diameter as the bottom of the telescopic column (330) is formed at the top of the positioning rod (3301); The surfaces of the two semicircular connecting plates (210) are fixedly connected to the limiting plates (220), the tops of the limiting plates (220) are provided with a plurality of positioning grooves (2201), and the surfaces of the positioning rods (3301) are adapted to be inserted into the inner walls of the positioning grooves (2201).

8. The automobile transmission gear fixing and slotting device according to claim 1, characterized in that: A rotating groove (1101) is provided on the surface of the supporting circular plate (110); a first driving motor (140) is fixedly connected to the inner cavity of the workbench body (100); a rotating column (120) is fixedly connected to the output end of the first driving motor (140); and a surface of the rotating column (120) extends out of the rotating groove (1101) and is fixedly connected to the bottom of the placement plate (130).

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