Clutch cover positioning and machining fixture

Abstract

The present application relates to the technical field of clutch cover processing, in particular to a kind of clutch cover positioning machining clamp;Including the pedestal for placing cover and the pressing plate being located above pedestal and moving up and down, the bottom end of pressing plate can be detachably installed with the drill fixed platform with drill bit;Four in the center of pedestal Circular array distribution's pre-positioning mechanism, for the preliminary placement positioning of cover, and pre-positioning mechanism moves along the radial direction of the circle;Through the elastic self-adapting design of pre-positioning mechanism, the cover placement step is simplified, and the accurate pre-positioning and rigid locking of cover are realized by the multistage positioning of four Circular array distribution's pre-positioning mechanism and cooperation positioning group;Same clamp can be adapted to multiple specifications cover processing, without replacing clamp, reduce equipment investment and production downtime.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of clutch cover processing, in particular to a clutch cover positioning and processing clamp. BACKGROUND

[0002] The clutch cover is a key component in the clutch system, mainly used for pressing the clutch plate to ensure the reliability and stability of power transmission. It is usually used in cooperation with clutch disc, clutch plate and other components; during the processing of clutch cover, accurate positioning and firm clamping are the key to ensure the processing precision and quality.

[0003] The traditional clutch cover processing clamp has many problems: 1. Low placement accuracy: the existing clutch cover is placed on multiple fixed positioning columns, which is difficult to accurately place the clutch cover in the processing position, resulting in large size deviation of the processed product, affecting the overall performance and assembly precision of the clutch.

[0004] 2. Poor universality: the fixed positioning column can only be used for processing a single specification or model of clutch cover, and when different specifications of clutch cover need to be processed, different clamps need to be replaced, increasing the production cost and processing cycle.

[0005] 3. Poor clamping stability: during the processing, due to the influence of cutting force, vibration and other factors, the clutch cover is easy to loosen or displace, which not only affects the processing precision, but also may cause processing accidents. SUMMARY

[0006] The present application provides a clutch cover positioning and processing clamp to solve the problem of clutch cover processing positioning in related technology.

[0007] The application provides a clutch cover positioning machining clamp, which comprises a base for placing the cover and a pressing plate moving up and down above the base, and a drill bit fixing table with a drill bit is detachably arranged at the bottom end of the pressing plate; four pre-positioning mechanisms are arranged in a circumferential array at the center of the base and are used for preliminarily positioning the cover, and the pre-positioning mechanisms move along the radial direction of the circle; wherein the pre-positioning mechanism comprises a sliding hole penetratingly arranged on the base and a sliding column slidingly arranged in the sliding hole, an elastic positioning group is elastically arranged on the sliding column, overlapping pieces are elastically arranged on the two sides of the elastic positioning group, and a driving mechanism for driving the sliding column to move in the sliding hole is arranged at the bottom end of the sliding column; a cooperation positioning group is connected to the bottom end of the pressing plate through an elastic expansion rod, and a through slot for the cooperation positioning group to pass through is arranged in the middle of the drill bit fixing table; the cooperation positioning group comprises a connecting column fixedly connected to the expansion end of the elastic expansion rod, and cooperation pressing columns are fixedly arranged in a circumferential array on the connecting column and correspond to the positions of the pre-positioning mechanisms; the cooperation pressing columns cooperate with the overlapping pieces to jointly position the cover when the cooperation pressing columns descend with the pressing plate, and an inner positioning assembly for positioning the inner ring of the cover is rotatably connected to the bottom end of the cooperation pressing column.

[0008] In a possible implementation, the elastic positioning group comprises a connecting block fixedly connected to the side of the sliding column away from the driving mechanism, the connecting block is located at the bottom end of the sliding hole, the two sides of the connecting block are slidingly connected to the slide grooves arranged at the bottom end of the base through L-shaped connecting rods, the slide grooves are respectively arranged at the two sides of the sliding hole, a rectangular recess for the positioning rod to slide is arranged at the upper end of the connecting block, and a connecting spring is fixedly connected between the positioning rod and the sliding hole.

[0009] In a possible implementation, the overlapping pieces are L-shaped structures, the side walls of the L-shaped connecting rods are provided with accommodating grooves for the two overlapping pieces to move, the two overlapping pieces are connected through springs, and the distances between the vertical sections of the two overlapping pieces and the L-shaped connecting rod gradually decrease from top to bottom.

[0010] In a possible implementation, the sliding hole is provided with a communication groove in communication with the sliding hole along the length direction of the sliding hole, and two shielding pieces are slidingly connected in the communication grooves, one of the shielding pieces is fixedly connected to the side of the positioning rod close to the center of the base, and the other shielding piece is fixedly connected to the side of the outer abutting block away from the center of the base.

[0011] In a possible implementation, the driving mechanism comprises a push rod hinged through a first hinge seat, the other end of the push rod is hinged to an annular fixing seat through a second hinge seat, the annular fixing seat is fixedly connected to a lifting rod, and the lifting rod slides up and down through the center of the base.

[0012] In a possible implementation, the matching compression column is fixedly installed on the outer side wall of the connecting column through the mounting base, the matching compression column has a U-shaped structure, the distance between two opposite vertical segments of the U-shaped structure is equal to the width of the positioning rod, and the width of the vertical segments of the U-shaped structure gradually decreases from top to bottom.

[0013] In a possible implementation, the inner positioning assembly includes two ear seats fixedly connected at the bottom end of the mounting base, and a second elastic telescopic rod is rotationally connected between the two ear seats through a rotating positioning part, and a contact block is fixedly connected to the second elastic telescopic rod at a position close to the bottom end through a connecting plate.

[0014] In a possible implementation, the rotating positioning part includes a rotating rod rotationally penetrating the two ear seats, the rotating rod fixedly penetrates the second elastic telescopic rod, one end of the rotating rod is fixedly connected with an angle limiting ring, the side of the angle limiting ring close to the ear seat is fixedly connected with a plug-in rod, and a plug-in slot is formed in the ear seat close to the side of the contact block, and the plug-in slot is plugged with the plug-in rod.

[0015] In a possible implementation, the outer positioning assembly includes an outer contact block slidingly connected in the sliding hole and a threaded adjusting rod rotationally penetrating the outer contact block, and the threaded adjusting rod is threadedly connected to the connecting block, and the side of the outer contact block close to the connecting block is provided with an arc-shaped rubber pad.

[0016] In a possible implementation, a through hole in a trumpet shape is formed at the bottom end of the connecting column, and the diameter of the through hole gradually increases from top to bottom.

[0017] The above one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

[0018] 1. The coupling cover positioning machining clamp provided by the embodiment of the present application simplifies the cover placement step through the elastic self-adaptive design of the pre-positioning mechanism, and the accurate pre-positioning and rigid locking of the cover are realized through the four circumferentially arrayed pre-positioning mechanisms and the multi-stage positioning of the matching positioning group. The same clamp can be adapted to machining of covers of various specifications without the need to replace the clamp, thereby reducing equipment investment and production downtime.

[0019] 2. The coupling cover positioning machining clamp provided by the embodiment of the present application, the driving mechanism controls the lifting rod and the pushing rod through the electric telescopic rod, synchronously adjusts the radial positions of the plurality of pre-positioning mechanisms, and is adapted to covers of different diameters. Meanwhile, the outer positioning assembly adjusts the position of the outer contact block through the threaded adjusting rod, and matches the outer diameter of the cover.

[0020] 3. The coupling cover positioning machining clamp provided by the embodiment of the present application balances the cutting force distribution through the synchronous compression design of the inner and outer rings, reduces the single-point stress concentration, and prolongs the service life of the clamp.

[0021] 4. The clutch cover positioning and machining clamp according to the embodiment of the present application, which realizes positioning and machining integration through linkage of the positioning assembly and the pressing plate, and provides elastic buffer in the pressing process through the elastic expansion rod of the positioning assembly, thereby avoiding rigid impact and cover displacement. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Fig. 1 is a first perspective view of the clutch cover positioning and machining clamp according to the embodiment of the present application.

[0023] Figure 2 Fig. 2 is a second perspective view of the clutch cover positioning and machining clamp according to the embodiment of the present application.

[0024] Figure 3 Fig. 3 is a base structure view of the clutch cover positioning and machining clamp according to the embodiment of the present application.

[0025] Figure 4 Fig. 4 is a structure view of the pre-positioning mechanism and driving mechanism of the clutch cover positioning and machining clamp according to the embodiment of the present application. Figure 2 Fig. 5 is an enlarged view of the structure at N in Fig. 4.

[0026] Figure 5 Fig. 6 is a structure view of the drill bit fixing table and the positioning assembly of the clutch cover positioning and machining clamp according to the embodiment of the present application.

[0027] Figure 6 Fig. 7 is a structure view of the pre-positioning mechanism and driving mechanism of the clutch cover positioning and machining clamp according to the embodiment of the present application.

[0028] Figure 7 Fig. 8 is a structure view of the drill bit fixing table and the positioning assembly of the clutch cover positioning and machining clamp according to the embodiment of the present application.

[0029] Figure 8 Fig. 9 is a structure view of the positioning assembly of the clutch cover positioning and machining clamp according to the embodiment of the present application.

[0030] Figure 9 Fig. 10 is a structure view of the rotating positioning part of the clutch cover positioning and machining clamp according to the embodiment of the present application.

[0031] Figure 10 Fig. 11 is a state view of the clutch cover positioning and machining clamp before and after drilling operation according to the embodiment of the present application.

[0032] In the figure: 1, base; 11, support table; 2, pressing plate; 3, drill bit fixing table; 4, pre-positioning mechanism; 41, sliding hole; 411, communication groove; 412, shielding piece; 42, sliding column; 43, elastic positioning group; 431, connecting block; 432, L-shaped connecting rod; 433, positioning rod; 434, connecting spring; 44, lapping piece; 5, driving mechanism; 51, pushing rod; 52, annular fixing seat; 53, lifting rod; 6, matching positioning group; 60, elastic telescopic rod one; 61, connecting column; 62, matching pressing column; 63, inner positioning assembly; 631, ear seat; 632, rotating positioning part; 6321, rotating rod; 6322, angle limiting ring; 633, elastic telescopic rod two; 634, abutting block; 7, outer positioning assembly; 71, outer abutting block; 72, threaded adjusting rod. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0034] Please refer to Figure 1 and Figure 2 A kind of clutch gland positioning machining clamp, including the base 1 for placing gland and the pressing plate 2 that is located above base 1 and moves up and down, base 1 is fixed on support table 11 by bolt, support table 11 is fixedly installed on machining tool, pressing plate 2 moves up and down on support frame by hydraulic cylinder, support frame is also fixedly installed on machining tool, the upper end of support table 11 is fixedly installed with spring telescopic rod, the bottom end of pressing plate 2 is fixedly connected with butt cylinder corresponding the position of spring telescopic rod, when pressing plate 2 moves down by hydraulic cylinder, butt cylinder will butt with spring telescopic rod, play the role of alignment, this is prior art, will not be repeated here, and the machining clamp in the present application can adapt to different machining of clutch gland, the present application takes drilling as an example, but is not limited to drilling machining.

[0035] Please refer to Figure 1 , Figure 2 and Figure 7The bottom end of the pressure plate 2 is detachably equipped with a drill bit fixing table 3. The drill bit fixing table 3 can be fixedly connected to the bottom end of the pressure plate 2 by bolts. The center of the bottom end of the pressure plate 2 is connected to the mating positioning group 6 by an elastic telescopic rod 60. It should be noted that the drill bit fixing table 3 is a replaceable structure. Different drill bit fixing tables 3 are different in terms of the installation position of the drill bit and the center distance, so as to adapt to different models of clutch cover for drilling operations. In addition, the drill bit fixing table 3 has a through groove in the middle for the mating positioning group 6 to pass through, which can also avoid interference when replacing the drill bit fixing table 3.

[0036] Please see Figure 1 , Figure 2 and Figure 3 The clutch cover positioning and machining fixture includes four pre-positioning mechanisms 4 arranged in a circumferential array at the center of the base 1, used for initial placement and positioning of the cover, and the pre-positioning mechanism 4 moves radially along the circle. The pre-positioning mechanism 4 includes a sliding hole 41 that passes through the base 1 and a sliding column 42 that is slidably installed in the sliding hole 41. An elastic positioning group 43 is elastically provided on the sliding column 42, and overlapping members 44 are elastically provided on both sides of the elastic positioning group 43. A drive mechanism 5 is provided at the bottom end of the sliding column 42 to drive the sliding column 42 to move in the sliding hole 41.

[0037] Please see Figure 3 , Figure 4 , Figure 5 and Figure 6 The elastic positioning assembly 43 includes a connecting block 431 fixedly connected to the side of the sliding column 42 away from the driving mechanism 5. The connecting block 431 is located at the bottom end of the sliding hole 41. The two sides of the connecting block 431 are slidably connected to the sliding grooves opened at the bottom end of the base 1 through L-shaped connecting rods 432. The sliding grooves are located on both sides of the sliding hole 41. A rectangular groove is opened at the upper end of the connecting block 431 for the positioning rod 433 to slide. A connecting spring 434 is fixedly connected between the positioning rod 433 and the sliding hole 41.

[0038] The pre-positioning mechanism 4 is arranged to preliminarily position the clutch cover, and in the initial state, the driving mechanism 5 synchronously drives the plurality of sliding columns 42 to move in the sliding holes 41 according to the size of the clutch cover type, and the positioning rods 433 are at the maximum distance from the sliding holes 41 in the initial state of the connecting springs 434, and the equipment holes on the clutch cover are aligned with the plurality of positioning rods 433 and placed on the base 1. Since the positioning rods 433 are elastically arranged, the clutch cover can drive the positioning rods 433 to move when placed, and it is not necessary to ensure that the clutch cover is placed horizontally, which reduces the difficulty of placing the clutch cover. In addition, the cross-sectional area of the positioning rod 433 is smaller than the cross-sectional area of the smallest equipment hole of the clutch cover, so that the positioning rod 433 can smoothly pass through the equipment hole on the clutch cover and preliminarily limit the clutch cover.

[0039] Please refer to Figure 5 and Figure 6 , the driving mechanism 5 includes a push rod 51 hinged through a first hinge seat, the other end of the push rod 51 is hinged on an annular fixed seat 52, the annular fixed seat 52 is fixedly connected to a lifting rod 53, and the lifting rod 53 slides up and down through the center of the base 1.

[0040] Specifically, the driving mechanism 5 is used to drive the plurality of sliding columns 42 to move, and the bottom end of the lifting rod 53 is connected to an electric telescopic rod, the structure of which is not shown in the figure. The telescopic end of the electric telescopic rod drives the lifting rod 53 to move up and down on the base 1, and in turn drives the plurality of push rods 51 on the annular fixed seat 52 to rotate, and the push rod 51 pushes the sliding column 42 to move in the sliding hole 41.

[0041] Please refer to Figure 5 and Figure 6 , the lap joint 44 is an L-shaped structure, the sidewall of the L-shaped connecting rod 432 is provided with a containing groove for the movement of the two lap joints 44, the two lap joints 44 are connected by a spring, and the vertical sections of the two lap joints 44 gradually decrease from top to bottom with respect to the distance from the L-shaped connecting rod 432.

[0042] Please refer to Figure 2 , Figure 7 and Figure 8The cooperation positioning group 6 includes a connecting column 61 fixedly connected to the telescopic end of the elastic telescopic rod 1, and a cooperation compression column 62 fixedly installed on the outer sidewall of the connecting column 61 in a circumferential array and corresponding to the position of the predetermined positioning mechanism 4. The cooperation compression column 62 is in a U-shaped structure, the distance between the two opposite vertical sections of the U-shaped structure is equal to the width of the positioning rod 433, and the width of the vertical section of the U-shaped structure gradually decreases from top to bottom, facilitating the cooperation compression column 62 to contact and cooperate with the lap joint 44 during downward movement, and the cooperation compression column 62 cooperates with the lap joint 44 to position the compression cover when the pressing plate 2 is lowered. The bottom end of the cooperation compression column 62 is rotatably connected with an inner positioning assembly 63 for positioning the inner circle of the compression cover.

[0043] First of all, it is pointed out that the elastic coefficient of the elastic telescopic rod 1 is much larger than that of the connecting spring 434 and the elastic telescopic rod 2 633, and the elastic telescopic rod 1 still does not deform when the connecting spring 434 and the elastic telescopic rod 2 633 are squeezed to the minimum stroke. Specifically, the connecting column 61 moves downward under the driving of the pressing plate 2, and the connecting column 61 synchronously drives the cooperation compression column 62 and the inner positioning assembly 63 to move downward. During the downward movement, the cooperation compression column 62 will be in contact with the lap joint 44, the lower end of the cooperation compression column 62 contacts the horizontal section of the L-shaped structure of the lap joint 44, and at the same time pushes the positioning rod 433 to move away from the center of the base 1, until the positioning rod 433 abuts against the inner wall of the compression cover hole, and the positioning rod 433 is elastically positioned to the compression cover hole, and at the same time, the inner positioning assembly 63 also forms a multi-point positioning to the compression cover. When the drilling head fixing table 3 is driven by the pressing plate 2 to drill the compression cover, the elastic telescopic rod 1 will be compressed close to the bottom end of the pressing plate 2, but the cooperation compression column 62 and the inner positioning assembly 63 still play a positioning role to the compression cover at this time.

[0044] Please refer to Figure 2 and Figure 7 The bottom end of the connecting column 61 is provided with a through hole in a trumpet shape, and the diameter of the through hole gradually increases from top to bottom. When the connecting column 61 moves downward, the trumpet-shaped through hole on the connecting column 61 will cooperate with the lifting rod 53, the axis of the connecting column 61 coincides with the axis of the lifting rod 53, which also plays a positioning role, and the through hole at the bottom end of the connecting column 61 can avoid interference with the lifting rod 53 during the downward movement.

[0045] Please refer to Figure 8 and Figure 9The inner positioning assembly 63 comprises two ear seats 631 fixedly connected at the bottom end of the mounting seat, two elastic extension rods 633 rotatably connected through a rotary positioning part 632 between the two ear seats 631, and a contact block 634 fixedly connected to the elastic extension rod 633 close to the bottom end through a connecting plate. The rotary positioning part 632 comprises a rotary rod 6321 rotatably penetrating through the two ear seats 631, the rotary rod 6321 fixedly penetrating the elastic extension rod 633, one end of the rotary rod 6321 fixedly connected with an angle limiting ring 6322, the angle limiting ring 6322 fixedly connected with a plug-in rod on the side close to the ear seat 631, and the ear seat 631 on the side close to the contact block 634 provided with a plug-in slot matched with the plug-in rod.

[0046] In the initial state, the rotary rod 6321 can rotate by a certain angle on the ear seat 631, and according to the size of the cover type, the angle of the elastic extension rod 633 and the matching compression column 62 is adjusted by rotating the rotary rod 6321. The plug-in rod on the angle limiting ring 6322 is matched with the plug-in slot on the ear seat 631, the rotary rod 6321 drives the elastic extension rod 633 to be fixed at a suitable angle, so that when the elastic extension rod 633 moves downward, the contact block 634 can be in contact with the inner wall of the cover.

[0047] Please refer to Figure 5 and Figure 6 The clutch cover positioning machining clamp further comprises an outer positioning assembly 7, the outer positioning assembly 7 comprises an outer contact block 71 slidingly connected in the sliding hole 41 and a threaded adjusting rod 72 rotatably penetrating through the outer contact block 71, and the threaded adjusting rod 72 is threadedly connected to the connecting block 431, and the outer contact block 71 is provided with an arc-shaped rubber pad on the side close to the connecting block 431.

[0048] According to the size of the cover type, the distance from the equipment hole on the cover of the specific type to the edge of the cover is measured, the outer contact block 71 is moved in the sliding hole 41 by rotating the threaded adjusting rod 72 to adjust the outer contact block 71, so that the distance from the outer contact block 71 to the center of the base 1 is slightly greater than the radius of the cover, and the arc-shaped rubber pad provided on the outer contact block 71 is in contact with the outer edge of the cover.

[0049] Please refer to Figure 3 and Figure 5 The sliding hole 41 is provided with a communication slot 411 communicated with the sliding hole 41 on both sides along the length direction, and two shielding pieces 412 are slidingly connected in the two communication slots 411, one of the two shielding pieces 412 is fixedly connected to the side of the positioning rod 433 close to the center of the base 1, and the other shielding piece 412 is fixedly connected to the side of the outer contact block 71 away from the center of the base 1.

[0050] The shielding piece 412 is arranged to shield the sliding hole 41 and guide the positioning rod 433 and the outer abutting block 71 when they move, and can shield the two ends of the sliding hole 41 adaptively during the sliding process of the positioning rod 433 and the outer abutting block 71 in the sliding hole 41, thereby avoiding too many chippings from falling into during the machining of the gland.

[0051] In the embodiments of the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature can be "above", "over" and "on" the second feature, which can be directly above or obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature can be "below", "under" and "under" the second feature, which can be directly below or obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0052] In the description of the present application, it should also be noted that, unless specifically defined and limited otherwise, the terms "arrangement", "connection", "installation", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, or slidingly connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0053] The embodiments of the specific implementation are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A clutch cover positioning and machining fixture, comprising a base (1) for placing the cover and a pressure plate (2) located above the base (1) and movable vertically, characterized in that: The bottom end of the pressure plate (2) is detachably equipped with a drill bit fixing table (3) with a drill bit. Four prepositioning mechanisms (4) arranged in a circular array at the center of the base (1) are used to initially position the pressure cap, and the prepositioning mechanisms (4) move radially along the circle they are in. The pre-positioning mechanism (4) includes a sliding hole (41) that passes through the base (1) and a sliding column (42) that is slidably installed in the sliding hole (41). An elastic positioning group (43) is elastically provided on the sliding column (42). Overlapping members (44) are elastically provided on both sides of the elastic positioning group (43). A driving mechanism (5) for driving the sliding column (42) to move in the sliding hole (41) is provided at the bottom end of the sliding column (42). The positioning assembly (6) is connected to the bottom of the pressure plate (2) via an elastic telescopic rod (60). A through slot is provided in the middle of the drill bit fixing table (3) for the positioning assembly (6) to pass through. The positioning assembly (6) includes a connecting column (61) fixedly connected to the telescopic end of the elastic telescopic rod (60). The connecting column (61) is arranged in a circumferential array and a clamping column (62) is fixedly installed at the position corresponding to the pre-positioning mechanism (4). When the clamping column (62) descends with the pressure plate (2), it cooperates with the overlapping piece (44) to position the pressure cap. The bottom end of the clamping column (62) is rotatably connected to an inner positioning component (63) for positioning the inner ring of the pressure cap. The elastic positioning group (43) includes a connecting block (431) fixedly connected to the side of the sliding column (42) away from the driving mechanism (5). The connecting block (431) is located at the bottom end of the sliding hole (41). The two sides of the connecting block (431) are slidably connected to the groove opened at the bottom end of the base (1) by L-shaped connecting rods (432). The grooves are located on both sides of the sliding hole (41). The upper end of the connecting block (431) is provided with a rectangular groove for the positioning rod (433) to slide. A connecting spring (434) is fixedly connected between the positioning rod (433) and the sliding hole (41). The overlapping member (44) has an L-shaped structure. The side wall of the L-shaped connecting rod (432) is provided with a receiving groove for the two overlapping members (44) to move. The two overlapping members (44) are connected by a spring. The distance between the vertical section of the two overlapping members (44) and the L-shaped connecting rod (432) gradually decreases from top to bottom. The drive mechanism (5) includes a push rod (51) hinged to a first hinge seat, and the other end of the push rod (51) is hinged to an annular fixed seat (52) via a second hinge seat. The annular fixed seat (52) is fixedly connected to a lifting rod (53), and the lifting rod (53) slides up and down through the center of the base (1). It also includes an external positioning component (7), which includes an external contact block (71) slidably connected in the sliding hole (41) and a threaded adjusting rod (72) rotatably passing through the external contact block (71). The threaded adjusting rod (72) is threadedly connected to the connecting block (431), and an arc-shaped rubber pad is provided on the side of the external contact block (71) near the connecting block (431).

2. The clutch cover positioning and machining fixture according to claim 1, characterized in that: The sliding hole (41) has a connecting groove (411) on both sides along its length direction. A blocking member (412) is slidably connected in the two connecting grooves (411). One blocking member (412) is fixedly connected to the side of the positioning rod (433) near the center of the base (1), and the other blocking member (412) is fixedly connected to the side of the outer contact block (71) away from the center of the base (1).

3. The clutch cover positioning and machining fixture according to claim 1, characterized in that: The mating clamping column (62) is fixedly installed on the outer wall of the connecting column (61) by the mounting base. The mating clamping column (62) has a U-shaped structure. The distance between the two relatively vertical sections of the U-shaped structure is equal to the width of the positioning rod (433), and the width of the vertical section of the U-shaped structure gradually decreases from top to bottom.

4. The clutch cover positioning and machining fixture according to claim 1, characterized in that: The internal positioning component (63) includes two ear seats (631) fixedly connected to the bottom of the mounting base. The two ear seats (631) are rotatably connected to an elastic telescopic rod (633) via a rotating positioning part (632). An abutment block (634) is fixedly connected to the position of the elastic telescopic rod (633) near the bottom via a connecting plate.

5. A clutch cover positioning and machining fixture according to claim 4, characterized in that: The rotating positioning part (632) includes a rotating rod (6321) that rotates through the two ear seats (631). The rotating rod (6321) is fixedly connected through the second elastic telescopic rod (633). One end of the rotating rod (6321) is fixedly connected to an angle limiting ring (6322). The side of the angle limiting ring (6322) near the ear seat (631) is fixedly connected to a plug rod. The ear seat (631) near the contact block (634) is provided with a plug groove, and the plug groove and the plug rod are engaged.

6. A clutch cover positioning and machining fixture according to claim 1, characterized in that: The bottom end of the connecting post (61) is provided with a funnel-shaped through hole, the diameter of which gradually increases from top to bottom.

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