Automobile engine gear machining clamp

Abstract

The utility model relates to the technical field of clamps, in particular to an automobile engine gear machining clamp which comprises a hollow base. Four strip-shaped grooves are formed in the upper surface of the bearing column in a circumferential array mode, and L-shaped clamping plates used for positioning the inner wall of a center hole in a timing gear are arranged on the inner walls of the four strip-shaped grooves in a sliding mode; and the second positioning assembly is used for positioning three peripheral holes in the timing gear. By means of the first positioning assembly and the second positioning assembly, in the actual using process of the clamp, the four L-shaped clamping plates can abut against the inner wall of a center hole at the same time, effective fixing of a timing gear is achieved, in the rotating process of the rotating rod, the three sliding plates can be driven to move towards the middle at the same time, and the clamping effect is good. And the three limiting clamping rollers are tightly clamped with the inner wall of the peripheral hole, and the peripheral hole is extruded towards the middle, so that the timing gear is further effectively fixed, and the machining stability of the timing gear is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a machining clamp for automobile engine gears. Background Art

[0002] The timing gear is a key component of the automobile engine assembly, ensuring that the engine intake and exhaust valves and the fuel supply system can accurately open and close and supply fuel according to the piston position. During the timing gear processing, a fixture is needed to position the timing gear.

[0003] In the prior art, a Chinese patent with announcement number CN216065855U discloses a positioning fixture, which adopts a scheme of "including a base, a bracket, a screw, a tightening handle, three elastic sliders, three supporting plates, three deflection sliders and three clamping and positioning wheels, the base is in the shape of a circular groove and its inner side wall is set as a slope, the diameter of the open end of the slope is larger than the diameter of the bottom end, and three vertical through grooves are arranged at equal angles on the side wall of the base, and a group of guide rails are provided on both sides of each of the vertical through grooves, and the guide rails are inclined at the same angle and direction as the slope, and a through hole is passed through the center of the bottom of the base". This scheme can adapt to the clamping and positioning of gears of different sizes and different numbers of teeth, has strong adaptability, and is convenient and quick to operate.

[0004] However, the above scheme still has some shortcomings. For example, after the clamp actually clamps and positions the timing gear, the clamping and positioning point of the clamp and the timing gear is on the teeth of the gear, which causes certain inconveniences when the teeth of the timing gear need to be processed, such as grinding and chamfering. That is, the teeth in contact with the positioning wheel cannot be processed and need to be repositioned, which is a cumbersome operation.

[0005] In view of this, the utility model proposes a machining fixture for automobile engine gears. Utility Model Content

[0006] The purpose of the utility model is to provide a machining fixture for automobile engine gears to solve the problems raised in the above background technology.

[0007] To achieve the above purpose, the utility model provides the following technical solutions: a machining fixture for automobile engine gears, comprising:

[0008] A hollow base, and a timing gear arranged on the upper surface of the hollow base, wherein the surface of the timing gear is respectively provided with a central hole and three peripheral holes, and a controller is arranged on the side of the hollow base;

[0009] The first positioning assembly comprises a load-bearing column fixedly mounted on the upper surface of the hollow base, and a supporting ring fixedly mounted on the top of the load-bearing column, the timing gear being arranged at the top of the supporting ring, the upper surface of the load-bearing column being provided with four strip grooves in a circumferential array, and the inner walls of the four strip grooves are slidably provided with an L-shaped clamping plate for positioning the inner wall of the center hole on the timing gear, the interior of the load-bearing column is provided with a mounting cavity extending to the interior of the hollow base, the inner bottom wall of the hollow base is rotatably provided with a rotating rod extending to the interior of the mounting cavity, the top of the rotating rod is fixedly provided with a first active bevel gear, the inner walls of the four strip grooves are rotatably provided with a lead screw, and one end of the four lead screws are extended to the interior of the mounting cavity and are fixedly provided with a first driven bevel gear meshing with the first active bevel gear, and the lower surface of the hollow base is provided with a driving motor for driving the rotating rod to rotate;

[0010] A second positioning assembly, which is used to position three peripheral holes on the timing gear;

[0011] The brake assembly is used for braking the rotating rod.

[0012] As a preferred technical solution, a limiting rod is fixedly provided on the inner wall of the strip groove, and the side surfaces of the L-shaped clamping plate are respectively provided with threaded holes threadedly connected to the outer surface of the lead screw and sliding holes slidably connected to the outer surface of the limiting rod.

[0013] As a preferred technical solution, the second positioning assembly includes threaded columns which are rotatably arranged on the inner wall of the hollow base in a circular array and respectively correspond to the three outer holes of the timing gear. A second active bevel gear is fixedly arranged on the outer surface of the rotating rod, and the ends of the three threaded columns are fixedly provided with second driven bevel gears which mesh with the second active bevel gear.

[0014] As a preferred technical solution, the inner bottom wall of the hollow base is slidably provided with three sliding plates corresponding to the three threaded columns, and the surfaces of the three sliding plates are respectively provided with threaded holes threadedly connected to the outer surfaces of the three threaded columns.

[0015] As a preferred technical solution, the top ends of the three sliding plates extend to the upper surface of the hollow base, and the inner top wall of the hollow base is provided with a limiting opening for the sliding of the three sliding plates. A connecting column is rotatably provided at the top end of the sliding plate, and a limiting clamping roller adapted to the inner wall of the outer hole is fixed to the top end of the connecting column.

[0016] As a preferred technical solution, the brake assembly includes an annular cavity opened inside the load-bearing column, and three hydraulic rods fixedly arranged on the inner side wall of the annular cavity in a circular array.

[0017] As a preferred technical solution, the telescopic ends of the three hydraulic rods are all fixedly provided with arc-shaped tooth plates, and the outer surface of the rotating rod is fixedly provided with brake toothed discs corresponding to the three arc-shaped tooth plates.

[0018] Beneficial Effects

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0020] 1. The utility model provides a first positioning component and a second positioning component, so that in actual use, the clamp can make the four L-shaped clamping plates simultaneously press the inner wall of the center hole to achieve effective fixation of the timing gear, and in the process of rotation of the rotating rod, it can drive the three sliding plates to move toward the middle at the same time, so that the three limit clamping rollers are clamped with the inner wall of the outer hole and the outer hole is squeezed toward the middle, thereby further achieving effective fixation of the timing gear and ensuring the stability of the timing gear during processing.

[0021] 2. The utility model sets a brake assembly so that after the clamp fixes the timing gear through the rotation of the driving motor, it can start three hydraulic rods to achieve effective braking of the rotating rods, further ensuring the stability of the timing gear during processing, and facilitating the grinding of the teeth of the timing gear, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0025] Figure 3 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0026] Figure 4 It is a schematic diagram of the top-section structure of the load-bearing column of the utility model.

[0027] In the figure:

[0028] 100. Hollow base;

[0029] 200, timing gear; 201, center hole; 202, peripheral hole;

[0030] 300, first positioning assembly; 301, load-bearing column; 302, support ring; 303, L-shaped clamping plate; 304, rotating rod; 305, first active bevel gear; 306, lead screw; 307, first driven bevel gear; 308, driving motor; 309, limit rod;

[0031] 400, second positioning assembly; 401, threaded column; 402, second active bevel gear; 403, second driven bevel gear; 404, sliding plate; 405, connecting column; 406, limit roller;

[0032] 500, brake assembly; 501, hydraulic rod; 502, arc-shaped tooth plate; 503, brake tooth disc. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Embodiment 1

[0035] According to the attached Figure 1-4 As shown, the embodiment of the utility model provides a fixture for machining gears of an automobile engine, comprising:

[0036] A hollow base 100, and a timing gear 200 disposed on the upper surface of the hollow base 100, wherein the surface of the timing gear 200 is respectively provided with a central hole 201 and three peripheral holes 202, and a controller is disposed on the side of the hollow base 100;

[0037] The first positioning assembly 300 includes a load-bearing column 301 fixed on the upper surface of the hollow base 100, and a support ring 302 fixed on the top of the load-bearing column 301. The timing gear 200 is arranged on the top of the support ring 302. The upper surface of the load-bearing column 301 is provided with four strip grooves in a circumferential array, and the inner walls of the four strip grooves are all slidably provided with L-shaped clamping plates 303 for positioning the inner wall of the center hole 201 on the timing gear 200. The interior of the load-bearing column 301 is provided with a central hole 201 extending to the hollow base 100. 00, the inner bottom wall of the hollow base 100 is rotatably provided with a rotating rod 304 extending into the interior of the mounting cavity, the top of the rotating rod 304 is fixedly provided with a first active bevel gear 305, the inner walls of the four strip grooves are rotatably provided with a lead screw 306, and one end of the four lead screws 306 extends into the interior of the mounting cavity and is fixedly provided with a first driven bevel gear 307 meshing with the first active bevel gear 305, and the lower surface of the hollow base 100 is provided with a driving motor 308 for driving the rotating rod 304 to rotate;

[0038] A limiting rod 309 is fixedly disposed on the inner wall of the strip groove, and a threaded hole threadedly connected to the outer surface of the lead screw 306 and a sliding hole slidably connected to the outer surface of the limiting rod 309 are respectively opened on the side surface of the L-shaped clamping plate 303 .

[0039] A second positioning assembly 400, which is used to position three peripheral holes 202 on the timing gear 200;

[0040] The second positioning assembly 400 includes threaded columns 401 which are rotatably arranged in a circular array on the inner wall of the hollow base 100 and respectively correspond to the three peripheral holes 202 of the timing gear 200. A second active bevel gear 402 is fixedly arranged on the outer surface of the rotating rod 304, and the ends of the three threaded columns 401 are fixedly arranged with second driven bevel gears 403 which mesh with the second active bevel gear 402.

[0041] The inner bottom wall of the hollow base 100 is slidably provided with three sliding plates 404 corresponding to the three threaded columns 401 , and the surfaces of the three sliding plates 404 are respectively provided with threaded holes threadedly connected to the outer surfaces of the three threaded columns 401 .

[0042] The top ends of the three sliding plates 404 extend to the upper surface of the hollow base 100, and the inner top wall of the hollow base 100 is provided with a limiting opening for the three sliding plates 404 to slide. A connecting column 405 is rotatably provided at the top end of the sliding plate 404, and a limiting card roller 406 adapted to the inner wall of the outer hole 202 is fixed at the top end of the connecting column 405.

[0043] In this embodiment, by setting the first positioning assembly 300 and the second positioning assembly 400, the fixture can place the timing gear 200 of the automobile engine on the load-bearing column 301 during actual use, and make the four L-shaped clamping plates 303 pass through the central hole 201, and the three limit clamping rollers 406 pass through the three peripheral holes 202 respectively, and then start the driving motor 308. The rotation of the driving motor 308 drives the rotating rod 304 to rotate, and the rotation of the rotating rod 304 drives the first active bevel gear 305 to rotate. The rotation of the first active bevel gear 305 drives the four first driven bevel gears 307 to rotate simultaneously, thereby driving the four lead screws 306 to rotate simultaneously, and the rotation of the four lead screws 306 drives the four L-shaped clamping plates 30 3 simultaneously moves outward, so that the four L-shaped clamping plates 303 simultaneously press against the inner wall of the central hole 201, thereby effectively fixing the timing gear 200, and in the process of the rotation of the rotating rod 304, the second active bevel gear 402 can be driven to rotate, and the rotation of the second active bevel gear 402 drives the three second driven bevel gears 403 to rotate, thereby driving the three threaded columns 401 to rotate simultaneously, and the rotation of the three threaded columns 401 drives the three sliding plates 404 to move toward the middle at the same time, so that the three limiting clamping rollers 406 are clamped with the inner wall of the peripheral hole 202, and the peripheral hole 202 is squeezed toward the middle, thereby further achieving effective fixation of the timing gear 200 and ensuring the stability of the timing gear 200 during processing.

[0044] Embodiment 2

[0045] On the basis of the first embodiment, and different from the first embodiment,

[0046] An automobile engine gear processing fixture further includes:

[0047] A brake assembly 500, which is used to brake the rotating rod 304;

[0048] The brake assembly 500 includes an annular cavity opened inside the load-bearing column 301 and three hydraulic rods 501 fixedly arranged in a circular array on the inner side wall of the annular cavity.

[0049] The telescopic ends of the three hydraulic rods 501 are all fixedly provided with arc-shaped tooth plates 502 , and the outer surface of the rotating rod 304 is fixedly provided with brake tooth discs 503 corresponding to the three arc-shaped tooth plates 502 .

[0050] In this embodiment, by providing a brake assembly 500, after the clamp fixes the timing gear 200 by rotating the driving motor 308, the three hydraulic rods 501 can be started to extend, thereby driving the three arc-shaped tooth plates 502 to move toward the middle at the same time, so that the three arc-shaped tooth plates 502 are engaged with the brake sprocket plate 503 at the same time, thereby achieving effective braking of the rotating rod 304, and further ensuring the stability of the timing gear 200 during processing.

[0051] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A fixture for machining gears of automobile engines, characterized in that: include, A hollow base (100), and a timing gear (200) arranged on the upper surface of the hollow base (100), wherein the surface of the timing gear (200) is respectively provided with a central hole (201) and three peripheral holes (202), and a controller is arranged on the side of the hollow base (100); The first positioning assembly (300) comprises a load-bearing column (301) fixedly mounted on the upper surface of the hollow base (100), and a support ring (302) fixedly mounted on the top of the load-bearing column (301), wherein the timing gear (200) is arranged on the top of the support ring (302), and the upper surface of the load-bearing column (301) is provided with four strip grooves in a circumferential array, and the inner walls of the four strip grooves are all slidably provided with L-shaped clamping plates (303) for positioning the inner wall of the center hole (201) on the timing gear (200), and the interior of the load-bearing column (301) is provided with a plurality of L-shaped clamping plates (303) extending to the inner wall of the central hole (201) on the timing gear (200). (100), the inner bottom wall of the hollow base (100) is rotatably provided with a rotating rod (304) extending into the interior of the mounting cavity, the top of the rotating rod (304) is fixedly provided with a first active bevel gear (305), the inner walls of the four strip-shaped grooves are rotatably provided with a lead screw (306), one end of each of the four lead screws (306) extends into the interior of the mounting cavity and is fixedly provided with a first driven bevel gear (307) meshing with the first active bevel gear (305), and the lower surface of the hollow base (100) is provided with a driving motor (308) for driving the rotating rod (304) to rotate; A second positioning assembly (400) for positioning three peripheral holes (202) on the timing gear (200); A brake assembly (500) is used to brake the rotating rod (304).

2. The automobile engine gear machining fixture according to claim 1, characterized in that: A limiting rod (309) is fixedly provided on the inner wall of the strip groove, and a threaded hole threadedly connected to the outer surface of the lead screw (306) and a sliding hole slidably connected to the outer surface of the limiting rod (309) are respectively provided on the side surface of the L-shaped clamping plate (303).

3. The automobile engine gear machining fixture according to claim 1, characterized in that: The second positioning assembly (400) comprises threaded columns (401) which are rotatably arranged in a circular array on the inner wall of the hollow base (100) and respectively correspond to the three peripheral holes (202) of the timing gear (200); a second active bevel gear (402) is fixedly arranged on the outer surface of the rotating rod (304); and second driven bevel gears (403) which mesh with the second active bevel gear (402) are fixedly arranged at the ends of the three threaded columns (401).

4. The automobile engine gear machining fixture according to claim 3, characterized in that: The inner bottom wall of the hollow base (100) is slidably provided with three sliding plates (404) corresponding to the three threaded columns (401), and the surfaces of the three sliding plates (404) are respectively provided with threaded holes threadably connected to the outer surfaces of the three threaded columns (401).

5. The automobile engine gear machining fixture according to claim 4, characterized in that: The top ends of the three sliding plates (404) extend to the upper surface of the hollow base (100), and the inner top wall of the hollow base (100) is provided with a limit opening for the three sliding plates (404) to slide. A connecting column (405) is rotatably provided at the top end of the sliding plate (404), and a limit roller (406) adapted to the inner wall of the peripheral hole (202) is fixedly provided at the top end of the connecting column (405).

6. The automobile engine gear machining fixture according to claim 1, characterized in that: The brake assembly (500) comprises an annular cavity opened inside a load-bearing column (301), and three hydraulic rods (501) fixedly arranged in a circular array on the inner side wall of the annular cavity.

7. The automobile engine gear machining fixture according to claim 6, characterized in that: The telescopic ends of the three hydraulic rods (501) are all fixedly provided with arc-shaped toothed plates (502), and the outer surface of the rotating rod (304) is fixedly provided with brake toothed discs (503) corresponding to the three arc-shaped toothed plates (502).

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