Cam bearing cap self-locking positioning clamp, die casting processing device and die casting

Abstract

This disclosure provides a self-locking fixture for a cam bearing cover, a die-casting apparatus, and a die-cast part. The self-locking fixture for the cam bearing cover includes a frame, a clamping table, and two opposing self-locking clamping mechanisms. The clamping table has clamping positions for placing the cam bearing cover. Each self-locking clamping mechanism includes a mounting base, a drive assembly, and a locking assembly; the locking assembly includes a positioning push rod and a stop; both the positioning push rod and the stop are elastically slidably mounted on the mounting base, and the sliding direction of the stop is at an angle to the sliding direction of the positioning push rod. The self-locking fixture for the cam bearing cover of this invention can coordinate the arrival time of the second end of the stop abutting and locking the positioning push rod by designing the stroke of the positioning push rod and the push block, preventing the positioning push rod from sliding further, thereby achieving a self-locking function. This effectively avoids the risk of deformation caused by the cam bearing cover being directly subjected to large forces, thus ensuring the machining accuracy of the assembly hole.

Description

Technical Field

[0001] This invention relates to the field of die casting processing technology, and in particular to a self-locking fixture for a cam bearing cover, a die casting processing device, and a die casting. Background Technology

[0002] Die casting is a precision casting method that uses high pressure to force molten metal into a complex-shaped metal mold. Generally, the formed die castings cannot immediately meet the usage requirements, so they need to be precision-machined. During the precision-machined process, fixtures are used to hold the die castings in place.

[0003] In the design process of fixtures, designers often use a clamping mechanism, such as the one disclosed in Chinese patent document CN106078290B, in a precision machining fixture for die castings for ease of manufacturing. The clamping mechanism is more suitable for die castings with relatively regular support bottom surfaces; however, for die castings with irregular contour surfaces, the clamping mechanism is less effective in fixing the die castings.

[0004] For example, Figure 1 The image shows a camshaft bearing cap 1 installed on an automobile engine, which is a thin-walled die-cast part. Mounting holes 2 are provided at both ends of the camshaft bearing cap 1. In the prior art, when precision machining, such as precision drilling, of the mounting holes 2 of the camshaft bearing cap 1, a cylinder is usually added to each side of the mounting platform of the camshaft bearing cap 1 to clamp and fix it. This causes the cylinder driving force to act directly on the camshaft bearing cap 1, which easily leads to the risk of deformation of the camshaft bearing cap 1, and thus cannot ensure the machining accuracy of the mounting holes 2. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a cam bearing cover self-locking positioning fixture, die casting processing device and die casting part that can realize the self-locking function, thereby effectively avoiding the risk of deformation caused by the direct cylinder driving force during the positioning and clamping process of the cam bearing cover, and thus ensuring the machining accuracy of the assembly hole.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A self-locking fixture for a cam bearing cover includes a frame, a clamping table, and two self-locking clamping mechanisms arranged opposite to each other.

[0008] The clamping platform is mounted on the frame, and the clamping platform is provided with a clamping position for placing the cam bearing cover.

[0009] Each of the self-locking clamping mechanisms includes a mounting base, a drive assembly, and a locking assembly; the mounting base has a sliding groove and is located on one side of the clamping table; the drive assembly includes a first telescopic drive member, a push rod, and a push block; the first telescopic drive member is located on the side of the mounting base opposite to the clamping table, one end of the push rod and one end of the push block are connected to the telescopic end of the first telescopic drive member, the other end of the push block is slidably connected to the sliding groove, and the end of the other end of the push block has an inclined surface; the locking assembly includes a positioning top rod and a stop member, the positioning top rod and the stop member are elastically slidably disposed on the mounting base, and the sliding direction of the stop member is at an angle to the sliding direction of the positioning top rod; the other end of the push rod is connected to the positioning top rod.

[0010] When the telescopic end of the first telescopic drive member drives the push rod and the push block to move synchronously toward the clamping table to the first predetermined position, the positioning top rod abuts against the end side of the cam bearing cover, and at the same time the first end of the stop member abuts against the inclined surface and slides relative to the mounting seat, and the second end of the stop member abuts against and is locked to the positioning top rod, it is in a self-locking state at this time.

[0011] When the telescopic end of the first telescopic drive member drives the push rod and the push block to move synchronously away from the clamping table to the second predetermined position, the positioning top rod leaves the end side of the cam bearing cover, and at the same time the stop member slides back to its original position relative to the mounting seat, and the second end of the stop member abuts against the positioning top rod, at which point it is in the unlocked state.

[0012] In one embodiment, the mounting base has a first through hole and a first countersunk hole that are sequentially connected; one end of the positioning push rod is located in the first countersunk hole, and a first return spring is movably sleeved on one end of the positioning push rod; the other end of the positioning push rod slides through the first through hole; the other end of the push rod extends into the first countersunk hole and abuts against one end of the positioning push rod; and / or

[0013] The sliding direction of the positioning top rod is parallel to the power output direction of the first telescopic drive component.

[0014] In one embodiment, the cam bearing cover self-locking fixture further includes a buffer assembly, which includes a compression spring and a piston block. The compression spring and the piston block are sequentially disposed in the mounting base. One end of the compression spring abuts against one end of the positioning push rod, and the other end of the compression spring abuts against the piston block. The piston block is located between the compression spring and the push rod.

[0015] In one embodiment, the drive assembly further includes a connecting push plate, one end of the push rod and one end of the push block are respectively connected to one side of the connecting push plate, and the other side of the connecting push plate is fixedly installed on the telescopic end of the first telescopic drive member.

[0016] In one embodiment, the mounting base is further provided with a second through hole and a second countersunk hole that are connected in sequence; the second through hole is connected to the first through hole; a second reset spring is movably sleeved on the second end of the stop member; the second end of the stop member is slidably connected to the second through hole; and the first end of the stop member is slidably connected to the second countersunk hole.

[0017] In one embodiment, the clamping position is fixedly equipped with a plurality of positioning supports, which are used to abut against the irregular contour surface of the cam bearing cover.

[0018] In one embodiment, the cam bearing cover self-locking fixture further includes a positioning component, which includes a first telescopic positioning member and a second telescopic positioning member. The first telescopic positioning member and the second telescopic positioning member are respectively provided with mounting holes at both ends of the cam bearing cover. The first telescopic positioning member and the second telescopic positioning member slide through the frame and the clamping table in sequence, so that one end of the first telescopic positioning member extends to the mounting hole at one end of the cam bearing cover, and one end of the second telescopic positioning member extends to the mounting hole at the other end of the cam bearing cover.

[0019] In one embodiment, the cam bearing cover self-locking positioning fixture further includes a pressing assembly; the pressing assembly includes a second telescopic drive, a lever seat, and a pressing member; the lever seat and the second telescopic drive are both located on the side of the clamping table, one end of the pressing member is rotatably connected to the telescopic ends of the lever seat and the second telescopic drive, and the other end of the pressing member extends above the clamping position, and the telescopic end of the second telescopic drive drives the other end of the pressing member away from or presses down on the cam bearing cover.

[0020] A die-casting processing apparatus includes the cam bearing cover self-locking fixture described in any of the above embodiments.

[0021] A die-cast part is obtained by processing using the aforementioned die-casting processing equipment.

[0022] Compared with the prior art, the present invention has at least the following advantages:

[0023] Since both the positioning rod and the stop are elastically slidably mounted on the mounting base, and the sliding direction of the stop is at an angle to the sliding direction of the positioning rod, when the push rod and the push block are driven to move synchronously toward the clamping table to the first predetermined position by the telescopic end of the first telescopic drive, the positioning rod abuts against the end side of the cam bearing cover. At the same time, the first end of the stop abuts against the inclined surface and slides relative to the mounting base. Finally, the second end of the stop abuts against and locks against the positioning rod, thereby achieving self-locking of the positioning rod. Conversely, when the push rod and the push block are driven to move synchronously away from the clamping table to the second predetermined position by the telescopic end of the first telescopic drive, the positioning rod moves away from the end side of the cam bearing cover. At the same time, the stop slides back relative to the mounting base. Finally, the second end of the stop abuts against and moves away from the positioning rod, thereby achieving unlocking of the positioning rod. The self-locking fixture for the cam bearing cover of this invention has an ingenious structural design and good structural compactness. By designing the stroke of the positioning rod and the push block, the timing of the second end of the stop member abutting and locking the positioning rod is coordinated, preventing the positioning rod from sliding further and thus achieving a self-locking function. This effectively avoids the risk of deformation caused by the cam bearing cover being directly subjected to large forces, thereby ensuring the machining accuracy of the assembly hole. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of a cam bearing cover;

[0026] Figure 2 This is another structural schematic diagram of the cam bearing cover;

[0027] Figure 3 This is a schematic diagram of the self-locking fixture for the wheel bearing cover in one embodiment;

[0028] Figure 4 for Figure 3 A cross-sectional view of the self-locking clamping mechanism of the wheel bearing cover self-locking positioning fixture shown;

[0029] Figure 5 for Figure 3 An exploded view of the self-locking clamping mechanism of the wheel bearing cover self-locking positioning fixture shown;

[0030] Figure 6 for Figure 5 The enlarged view of point A on the self-locking fixture of the wheel bearing cover shown;

[0031] Figure 7 for Figure 3 The diagram shows a partial structural schematic of the self-locking fixture for the wheel bearing cover.

[0032] Figure 8 for Figure 3 An exploded view of part of the self-locking fixture for the wheel bearing cover shown.

[0033] Figure 9 for Figure 8 The diagram shows a partial structural schematic of the detection and reset assembly of the wheel bearing cover self-locking fixture.

[0034] Figure 10 This is a schematic diagram of the clamping and limiting assembly of the wheel bearing cover self-locking fixture in another embodiment;

[0035] Figure 11 for Figure 10 An exploded view of the clamping and limiting assembly of the self-locking fixture for the wheel bearing cover shown.

[0036] Reference numerals: Cam bearing cover self-locking fixture 10; Cam bearing cover 1; Assembly hole 2; Plane to be machined 3; Frame 100; Hollowed-out position 101; Clamping table 200; Clamping position 201; Positioning support 210; Self-locking clamping mechanism 300; Mounting base 310; Slide groove 3101; First through hole 3102; First countersunk hole 3103; Second through hole 3104; Second countersunk hole 3105; Screw positioning hole 3106; Drive assembly 320; First telescopic drive component 3210; Push rod 3220; Push block 3230; Inclined surface 3232; Connecting push plate 3240; Locking assembly 330; Positioning top rod 3310; Limiting part 3312; Annular conical surface 3314; Stop 3320; Limiting groove 3322; First return spring component 3330; Second return spring component 3340; Buffer assembly 400; Compression Spring component 410; piston block 420; positioning assembly 500; first telescopic positioning component 510; first positioning post 5110; first locking part 5112; first connecting seat 5120; first locking hole 5122; first cylinder 5130; second telescopic positioning component 520; second positioning post 5210; second locking part 5212; second connecting seat 5220; second locking hole 5222; second cylinder 5230; pressing assembly 600; second telescopic drive component 610; lifting cylinder 6110; telescopic rod 6120; sliding guide sleeve 6130; lever seat 620; pressing component 630; detection and reset assembly 700; I-shaped support seat 710; air detection channel 7101; horizontal plate 720; detection rod 730; clamping and limiting assembly 800; guide seat 810; guide through hole 8101; slider 820; contour chuck 830. Detailed Implementation

[0037] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the invention.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] This disclosure provides a self-locking clamp for a cam bearing cover, including a frame, a clamping platform, and two self-locking clamping mechanisms arranged opposite to each other. The clamping platform is mounted on the frame and has clamping positions for placing the cam bearing cover. Each self-locking clamping mechanism includes a mounting base, a drive assembly, and a locking assembly. The mounting base has a sliding groove and is located on one side of the clamping platform. The drive assembly includes a first telescopic drive member, a push rod, and a push block. The first telescopic drive member is located on the side of the mounting base opposite to the clamping platform. One end of the push rod and one end of the push block are connected to the telescopic end of the first telescopic drive member. The other end of the push block is slidably connected to the sliding groove, and the other end of the push block has an inclined surface. The locking assembly includes a positioning top rod and a stop member. The positioning top rod and the stop member are elastically slidably mounted on the mounting base. The sliding direction of the stop member forms an angle with the sliding direction of the positioning top rod. The other end of the push rod is connected to the positioning top rod.

[0041] When the telescopic end of the first telescopic drive member drives the push rod and the push block to move synchronously toward the clamping table to the first predetermined position, the positioning top rod abuts against the end side of the cam bearing cover, and at the same time the first end of the stop member abuts against the inclined surface and slides relative to the mounting seat, and the second end of the stop member abuts against and is locked to the positioning top rod, it is in a self-locking state at this time.

[0042] When the telescopic end of the first telescopic drive member drives the push rod and the push block to move synchronously away from the clamping table to the second predetermined position, the positioning top rod leaves the end side of the cam bearing cover, and at the same time the stop member slides back to its original position relative to the mounting seat, and the second end of the stop member abuts against the positioning top rod, at which point it is in the unlocked state.

[0043] Please see Figures 1 to 11 To better understand the cam bearing cover self-locking fixture 10 of this disclosure, the following further explanation of the cam bearing cover self-locking fixture 10 is provided:

[0044] A cam bearing cover self-locking positioning fixture 10 according to one embodiment includes a frame 100, a clamping platform 200, and two self-locking clamping mechanisms 300 arranged opposite each other. The clamping platform 200 is disposed on the frame 100 and has a clamping position 201 for placing the cam bearing cover 1. Each self-locking clamping mechanism 300 includes a mounting base 310, a drive assembly 320, and a locking assembly 330. The mounting base 310 has a sliding groove 3101 and is located on one side of the clamping platform 200. The drive assembly 320 includes a first telescopic drive member 3210, a push rod 3220, and a push block 3230. The first telescopic drive member 3210 is disposed on the mounting base 310. The mounting base 310 is located on the side opposite to the clamping table 200. One end of the push rod 3220 and one end of the push block 3230 are both connected to the telescopic end of the first telescopic drive member 3210. The other end of the push block 3230 is slidably connected to the slide groove 3101, and the end of the other end of the push block 3230 has an inclined surface 3232. The locking assembly 330 includes a positioning push rod 3310 and a stop member 3320. The positioning push rod 3310 and the stop member 3320 are elastically slidably disposed on the mounting base 310. The sliding direction of the stop member 3320 is at an angle to the sliding direction of the positioning push rod 3310. The other end of the push rod 3220 is connected to the positioning push rod 3310.

[0045] When the telescopic end of the first telescopic drive member 3210 drives the push rod 3220 and the push block 3230 to move synchronously toward the clamping table 200 to the first predetermined position, the positioning top rod 3310 abuts against the end side of the cam bearing cover 1, and at the same time, the first end of the stop member 3320 abuts against the inclined surface 3232 and slides relative to the mounting base 310, and the second end of the stop member 3320 abuts against and is locked to the positioning top rod 3310, it is in a self-locking state at this time;

[0046] When the telescopic end of the first telescopic drive member 3210 drives the push rod 3220 and the push block 3230 to move synchronously away from the clamping table 200 to the second predetermined position, the positioning top rod 3310 leaves the end side of the cam bearing cover 1, and at the same time the stop member 3320 slides back to its original position relative to the mounting base 310, and the second end of the stop member 3320 abuts against the positioning top rod 3310, at which time it is in the unlocked state.

[0047] In this embodiment, since both the positioning push rod 3310 and the stop 3320 are elastically slidably disposed on the mounting base 310, and the sliding direction of the stop 3320 is at an angle to the sliding direction of the positioning push rod 3310, when the push rod 3220 and the push block 3230 are driven to move synchronously toward the clamping table 200 to the first predetermined position by the telescopic end of the first telescopic drive member 3210, the positioning push rod 3310 abuts against the end side of the cam bearing cover 1, and at the same time, the first end of the stop 3320 abuts against the inclined surface and slides relative to the mounting base 310, finally stopping... The second end of the moving member 3320 abuts and locks against the positioning rod 3310, thereby achieving self-locking of the positioning rod 3310; conversely, when the push rod 3220 and the push block 3230 are driven to move synchronously away from the clamping table 200 to the second predetermined position by the telescopic end of the first telescopic drive member 3210, the positioning rod 3310 is separated from the end side of the cam bearing cover 1, and at the same time, the stop member 3320 slides back to its original position relative to the mounting base 310, and finally the second end of the stop member 3320 abuts and leaves the positioning rod 3310, thereby achieving unlocking of the positioning rod 3310. The self-locking clamp 10 for the cam bearing cover of the present invention has an ingenious structural design and good structural compactness. By designing the stroke of the positioning rod 3310 and the push block 3230, the timing of the second end of the stop 3320 abutting and locking the positioning rod 3310 is coordinated, so that the positioning rod 3310 cannot slide further, thereby realizing the self-locking function. This effectively avoids the risk of deformation caused by the cam bearing cover 1 being directly subjected to a large force, thus ensuring the machining accuracy of the assembly hole 2.

[0048] like Figures 3 to 5 As shown, in one embodiment, the mounting base 310 has a first through hole 3102 and a first countersunk hole 3103 connected in sequence; one end of the positioning rod 3310 is located in the first countersunk hole 3103, and a first return spring 3330 is movably sleeved on one end of the positioning rod 3310; the other end of the positioning rod 3310 slides through the first through hole 3102; and the other end of the push rod 3220 extends into the first countersunk hole 3103 and abuts against one end of the positioning rod 3310. In one embodiment, the sliding direction of the positioning rod 3310 is parallel to the power output direction of the first telescopic drive member 3210.

[0049] It is understood that in this embodiment, the central axis of the first through hole 3102 coincides with the central axis of the first countersunk hole 3103, that is, the first through hole 3102 and the first countersunk hole 3103 are connected in a straight line and pass through both sides of the mounting base 310, so that the first telescopic drive member 3210 can drive the positioning push rod 3310 to slide through the push rod 3220, so that the other end of the positioning push rod 3310 abuts against the end side of the cam bearing cover 1, thereby realizing the positioning and clamping of the cam bearing cover 1. At the same time, after the first return spring member 3330 is elastically compressed, the driving force of the first telescopic drive member 3210 can be effectively reduced, making the positioning and clamping process of the cam bearing cover 1 smoother and more stable, effectively avoiding the risk of deformation caused by the cam bearing cover 1 being directly subjected to a large force.

[0050] Furthermore, one end of the positioning rod 3310 forms a limiting part 3312, and one end of the first reset spring 3330 abuts against the end face of the limiting part 3312. The diameter of the first countersunk hole 3103 is larger than the diameter of the first through hole 3102, allowing the other end of the first reset spring 3330 to abut against the bottom of the first countersunk hole 3103. This not only improves the ease of installation of the first reset spring 3330, but also, when the telescopic end of the first telescopic drive member 3210 drives the limiting part 3312 to slide via the push rod 3220, the first reset spring... The compression of the spring member 3330 effectively reduces the large driving force when the first telescopic drive member 3210 is activated, thus effectively avoiding the risk of deformation caused by the cam bearing cover 1 being directly subjected to a large force. Simultaneously, the first reset spring member 3330 enables the positioning push rod 3310 to have the ability to slide and reset. That is, when the telescopic end of the first telescopic drive member 3210 slides out along the first countersunk hole 3103, the first reset spring member 3330 drives the other end of the positioning push rod 3310 away from the end side of the cam bearing cover 1, thereby releasing the positioning clamp on the cam bearing cover 1. In this embodiment, the diameter of the limiting part 3312 is larger than the diameter of the first through hole 3102, achieving a better limiting effect.

[0051] Furthermore, the positioning push rod 3310 has an annular conical surface 3314 formed in its middle, and the annular conical surface 3314 gradually tapers from the other end of the positioning push rod 3310 towards one end of the positioning push rod 3310. Thus, when the first telescopic drive member 3210 drives the push block 3230 to slide towards the clamping table 200, the inclined surface 3232 of the other end of the push block 3230 abuts against the first end of the stop member 3320, thereby causing the second end of the stop member 3320 to gradually move upward until it abuts against the annular conical surface 3314. Specifically, when the second end of the stop 3320 initially abuts against the annular conical surface 3314, the clamping force of the second end of the stop 3320 is less than the sliding force of the positioning rod 3310, and the positioning rod 3310 continues to slide; as the first end of the stop 3320 continues to abut against the inclined surface 3232 and moves upward, the clamping force of the second end of the stop 3320 gradually exceeds the sliding force of the positioning rod 3310, and the positioning rod 3310 can no longer slide, so as to achieve the positioning and clamping of the positioning rod 3310 on the cam bearing cover 1. It is understandable that after the positioning push rod 3310 completes self-locking, whether the other end of the positioning push rod 3310 needs to continue sliding towards the clamping table 200 or retracting, the clamping force of the second end of the stop 3320 needs to be overcome, which can effectively avoid the risk of deformation caused by the cam bearing cover 1 being directly subjected to a large force. At the same time, it can also effectively prevent the clamping from loosening during the positioning and clamping process of the positioning push rod 3310 on the cam bearing cover 1, thus ensuring the machining accuracy of the assembly hole 2.

[0052] like Figure 4 and Figure 5 As shown, in one embodiment, the cam bearing cover self-locking fixture 10 further includes a buffer assembly 400, which includes a compression spring 410 and a piston block 420. The compression spring 410 and the piston block 420 are sequentially disposed within the mounting base 310. One end of the compression spring 410 abuts against one end of the positioning push rod 3310, and the other end of the compression spring 410 abuts against the piston block 420. The piston block 420 is located between the compression spring 410 and the push rod 3220. Specifically, in this embodiment, the compression spring 410 and the piston block 420 are sequentially disposed within the first countersunk hole 3103.

[0053] It is understandable that by sequentially adding a compression spring 410 and a piston block 420 between the positioning push rod 3310 and the push rod 3220, not only can the large driving force of the first telescopic drive member 3210 be further reduced, but the smoothness of the sliding of the telescopic end of the first telescopic drive member 3210 through the push rod 3220 driving the positioning push rod 3310 can also be improved. Furthermore, by using a combination of first return spring members 3330 and compression spring members 410 with different compression strokes, the positioning and clamping force applied by the positioning push rod 3310 to the cam bearing cover 1 can be adjusted, thereby avoiding the risk of deformation caused by the large force of the first telescopic drive member 3210 directly acting on the cam bearing cover 1.

[0054] like Figure 5 As shown, in one embodiment, the drive assembly 320 further includes a connecting push plate 3240, one end of the push rod 3220 and one end of the push block 3230 are respectively connected to one side of the connecting push plate 3240, and the other side of the connecting push plate 3240 is fixedly installed on the telescopic end of the first telescopic drive member 3210.

[0055] It is understood that in this embodiment, the first telescopic drive member 3210 can synchronously drive the push rod 3220 and the push block 3230 to move through the connecting push plate 3240, thereby effectively improving the utilization rate of the first telescopic drive member 3210, and thus making the cam bearing cover self-locking fixture 10 have a better structural compactness.

[0056] like Figures 4 to 6 As shown, in one embodiment, the mounting base 310 is further provided with a second through hole 3104 and a second countersunk hole 3105 connected in sequence; the second through hole 3104 is connected to the first through hole 3102; the second end of the stop member 3320 is movably sleeved with a second reset spring member 3340, the second end of the stop member 3320 is slidably connected to the second through hole 3104, and the first end of the stop member 3320 is slidably connected to the second countersunk hole 3105.

[0057] It can be understood that when the first telescopic drive member 3210 drives the push block 3230 to slide towards the clamping table 200, causing the inclined surface 3232 of the other end of the push block 3230 to abut against the first end of the stop member 3320, the first end of the stop member 3320 moves upward along the inclined surface 3232, thereby causing the second end of the stop member 3320 to slide to the first through hole 3102 and abut against and lock the positioning push rod 3310. Similarly, when the first telescopic drive member 3210 drives the push block 3230 to slide away from the clamping table 200, causing the inclined surface 3232 of the other end of the push block 3230 to move away from the first end of the stop member 3320, at the same time, under the elastic reset force of the second return spring member 3340, the first end of the stop member 3320 moves downward along the inclined surface 3232, thereby causing the second end of the stop member 3320 to reduce the locking force applied to the positioning push rod 3310.

[0058] Furthermore, the first end of the stop 3320 is provided with a limiting groove 3322, which extends along the length direction of the first end of the stop 3320; the mounting base 310 is also provided with a screw positioning hole 3106, which is perpendicularly connected to the second countersunk hole 3105. The screw positioning hole 3106 is used to install a limiting screw, and the end of the limiting screw extends to the limiting groove 3322. In this way, the excessive upward movement of the second end of the stop 3320 can be effectively prevented from causing the positioning rod 3310 to jam. At the same time, it also prevents the stop 3320 from falling out of the second countersunk hole 3105 under the elastic reset force of the second reset spring 3340. This improves the structural rationality of the cam bearing cover self-locking fixture 10, effectively ensuring that the stop 3320 can achieve the self-locking function of the positioning rod 3310. This effectively avoids the risk of deformation caused by the cam bearing cover 1 being directly subjected to a large force, thus ensuring the machining accuracy of the assembly hole 2.

[0059] Furthermore, the first end of the stop 3320 is the large end of the stop 3320, and the second end of the stop 3320 is the small end of the stop 3320. The diameter of the large end of the stop 3320 is larger than the diameter of the small end of the stop 3320. This facilitates the movable mounting of the second return spring 3340 onto the small end of the stop 3320, with the large end of the stop 3320 providing a limiting position for the second return spring 3340. This effectively improves the ease of installation of the second return spring 3340 and also enhances the structural compactness of the stop 3320 and the mounting base 310.

[0060] It should be noted that the sliding direction of the stop 3320 is at an angle to the sliding direction of the positioning rod 3310, that is, the central axis of the first through hole 3102 and the central axis of the second through hole 3104 are at an angle. In this embodiment, the central axis of the first through hole 3102 and the central axis of the second through hole 3104 are set at a 90-degree angle, so that the second end of the stop 3320 can slide well into the first through hole 3102 and abut against and lock the positioning rod 3310. Of course, this is not a limitation, and those skilled in the art can make other choices as needed.

[0061] like Figures 1 to 3 As shown, in one embodiment, the clamping position 201 is fixedly equipped with a plurality of positioning supports 210, which are used to abut against the irregular contour surface S of the cam bearing cover 1.

[0062] Understandable, such as Figure 1 and Figure 2 As shown, the cam bearing cover 1 has an arched structure and two machined surfaces 3. Therefore, when the cam bearing cover 1 is placed on the clamping position 201, the two machined surfaces 3 of the cam bearing cover 1 are set upwards and abut against the irregular contour surface S of the cam bearing cover 1 by multiple positioning supports 210. This ensures that the mounting hole 2 of the cam bearing cover 1 and the two machined surfaces 3 can be precision machined at the same time.

[0063] like Figures 1 to 3 As shown, in one embodiment, each of the positioning supports 210 is detachably connected to the clamping table 200. This facilitates the replacement of positioning supports 210 of different specifications, thereby better adapting to the irregular contour surface S of the cam bearing cover 1, ensuring the accuracy of the cam bearing cover 1's placement in the clamping position 201, and thus guaranteeing the machining accuracy of the assembly hole 2 and the two machined surfaces 3. Specifically, in this embodiment, the positioning support 210 and the clamping table 200 are connected by screws, i.e., the lower end of the positioning support 210 has an external thread, and the clamping table 200 has an internal thread hole. Through the threaded connection between the external thread and the internal thread hole, the height of the upper end of the positioning support 210 from the clamping table 200 can be adjusted, thus allowing for the placement of cam bearing covers 1 of different specifications and sizes under the combined abutment of multiple positioning supports 210. In other embodiments, the positioning support 210 and the clamping table 200 can also be connected by snap-fit, thereby improving the ease of installation of the positioning support 210.

[0064] like Figure 1 , Figure 2 , Figure 4 and Figure 7As shown, in one embodiment, the cam bearing cover self-locking fixture 10 further includes a positioning component 500, which includes a first telescopic positioning member 510 and a second telescopic positioning member 520. The first telescopic positioning member 510 and the second telescopic positioning member 520 are respectively arranged to correspond one-to-one with the assembly holes 2 at both ends of the cam bearing cover 1. The first telescopic positioning member 510 and the second telescopic positioning member 520 slide through the frame 100 and the clamping table 200 in sequence, so that one end of the first telescopic positioning member 510 extends to the assembly hole 2 at one end of the cam bearing cover 1, and one end of the second telescopic positioning member 520 extends to the assembly hole 2 at the other end of the cam bearing cover 1.

[0065] It is understandable that, since the first telescopic positioning member 510 and the second telescopic positioning member 520 both slide sequentially through the frame 100 and the clamping table 200, and the first telescopic positioning member 510 and the second telescopic positioning member 520 are corresponding one-to-one with the assembly holes 2 at both ends of the cam bearing cover 1; therefore, when the cam bearing cover 1 is placed in the clamping position 201, by aligning the assembly hole 2 at one end of the cam bearing cover 1 with one end of the first telescopic positioning member 510, and aligning the assembly hole 2 at the other end of the cam bearing cover 1 with one end of the second telescopic positioning member 520, the cam bearing can be properly positioned. The placement of cover 1 serves as a pre-positioning mechanism to effectively ensure the accuracy of the cam bearing cover 1's placement. Then, the cam bearing cover 1 is positioned and clamped by the positioning push rods 3310 of the two opposing self-locking clamping mechanisms 300. Finally, the first telescopic positioning member 510 exits from the assembly hole 2 at one end of the cam bearing cover 1, and the second telescopic positioning member 520 exits from the assembly hole 2 at the other end of the cam bearing cover 1. This effectively avoids the problem of tool collision at both ends of the assembly holes 2 during the finishing process, thereby ensuring the machining accuracy of the assembly holes 2.

[0066] like Figure 3 , Figure 7 and Figure 8 As shown, in one embodiment, the cam bearing cover self-locking fixture 10 further includes a pressing component 600; the pressing component 600 includes a second telescopic drive member 610, a lever seat 620, and a pressing member 630; the lever seat 620 and the second telescopic drive member 610 are both located on the side of the clamping table 200, one end of the pressing member 630 is rotatably connected to the telescopic ends of the lever seat 620 and the second telescopic drive member 610 respectively, and the other end of the pressing member 630 extends above the clamping position 201, and the telescopic end of the second telescopic drive member 610 drives the other end of the pressing member 630 away from or presses down on the cam bearing cover 1.

[0067] It should be noted that two self-locking clamping mechanisms 300 arranged opposite to each other and a clamping table 200 constitute a cam bearing cover 1 machining station; specifically, in this embodiment, the cam bearing cover self-locking positioning fixture 10 has two cam bearing cover 1 machining stations, so as to effectively improve the efficiency of cam bearing cover 1 finishing.

[0068] It can be understood that the telescopic end of the second telescopic drive member 610 uses the lever principle to push upward, thereby driving the other end of the pressing member 630 to press down on the cam bearing cover 1, thus effectively ensuring the stability of the clamping and positioning of the cam bearing cover 1; conversely, when the telescopic end of the second telescopic drive member 610 uses the lever principle to retract downward, it drives the other end of the pressing member 630 away from the cam bearing cover 1, thereby causing the pressing member 630 to release the downward pressure applied to the cam bearing cover 1. Furthermore, in this embodiment, there is one second telescopic drive member 610, and two lever seats 620 and two pressing members 630. The two lever seats 620, the two pressing members 630, and the one second telescopic drive member 610 are all located between the two cam bearing cover 1 machining stations. This allows the second telescopic drive member 610 to simultaneously drive the two pressing members 630 to press and clamp the cam bearing cover 1 at the two cam bearing cover 1 machining stations, effectively improving the efficiency of the cam bearing cover 1 finishing process. Compared with the vertical clamping mechanism in the engine transition connecting plate positioning fixture disclosed in Chinese patent document CN107738126B, the pressing assembly 600 has better structural compactness. At the same time, the second telescopic drive member 610 can use the lever principle to drive the pressing member 630 to press and clamp the cam bearing cover 1 in a more labor-saving process, and the pressing member 630 has better stability when pressing down. This can further ensure the machining accuracy of the assembly hole 2.

[0069] like Figure 3 , Figure 7 and Figure 8 As shown, in one embodiment, the frame 100 has a cutout 101, and the other end of the second telescopic drive member 610, the first telescopic positioning member 510 and the second telescopic positioning member 520 are all disposed in the cutout 101.

[0070] It is understood that the telescopic end of the second telescopic drive member 610 slides through the frame 100 and extends between the two cam bearing cover 1 processing stations; wherein, the other end of the first telescopic positioning member 510 and the other end of the second telescopic positioning member 520 are both located below the two self-locking clamping mechanisms 300 arranged opposite to each other, thereby effectively improving the space utilization of the frame 100 and making the cam bearing cover self-locking positioning fixture 10 of the present invention more compact and ingenious.

[0071] Furthermore, the second telescopic drive component 610 includes a lifting cylinder 6110, a telescopic rod 6120, and a sliding guide sleeve 6130. The lifting cylinder 6110 is disposed within the hollowed-out position 101. One end of the telescopic rod 6120 is connected to the power output end of the lifting cylinder 6110, and the other end of the telescopic rod 6120 slides through the inner hole of the sliding guide sleeve 6130 to the side of the clamping table 200, and is rotatably connected to one end of the pressing component 630. It can be understood that by adding the sliding guide sleeve 6130, the other end of the telescopic rod 6120 can be effectively ensured to have better stability and wear resistance during sliding, thereby making the lifting cylinder 6110 drive the pressing component 630 to press down more stably through the telescopic rod 6120. This can effectively prevent the cam bearing cover 1 from becoming loose, thus further ensuring the machining accuracy of the assembly hole 2.

[0072] Furthermore, such as Figure 7 and Figure 8 As shown, in one embodiment, the first telescopic positioning member 510 includes a first positioning post 5110, a first connecting seat 5120, and a first cylinder 5130; one end of the first positioning post 5110 slides through the frame 100 and the clamping table 200 in sequence, and extends to the assembly hole 2 at one end of the cam bearing cover 1; the first connecting seat 5120 is fixedly installed at the power output end of the first cylinder 5130; the first connecting seat 5120 has a first locking hole 5122; the other end of the first positioning post 5110 forms a first locking part 5112, and the first locking part 5112 is locked into the first locking hole 5122;

[0073] The second telescopic positioning member 520 includes a second positioning post 5210, a second connecting seat 5220, and a second cylinder 5230; one end of the second positioning post 5210 slides through the frame 100 and the clamping table 200 in sequence, and extends to the assembly hole 2 at the other end of the cam bearing cover 1; the second connecting seat 5220 is fixedly installed at the power output end of the second cylinder 5230; the second connecting seat 5220 has a second locking hole 5222; the other end of the second positioning post 5210 forms a second locking part 5212, and the second locking part 5212 is engaged in the second locking hole 5222.

[0074] It is understood that in this embodiment, the first cylinder 5130, the first connecting seat 5120, the second cylinder 5230 and the second connecting seat 5220 are all arranged in the hollow position 101, so that the first cylinder 5130 drives the first positioning column 5110 to slide through the frame 100 and the clamping table 200 through the first connecting seat 5120, and the second cylinder 5230 drives the second positioning column 5210 to slide through the frame 100 and the clamping table 200 through the second connecting seat 5220, thereby achieving the function of pre-positioning the cam bearing cover 1, so as to effectively ensure the positional accuracy of the cam bearing cover 1.

[0075] Furthermore, by using a cylinder drive, the sliding response rate of the first positioning post 5110 and the second positioning post 5210 is improved, thereby effectively improving the positioning, clamping and finishing efficiency of the cam bearing cover 1.

[0076] Furthermore, since the depth of the mounting holes 2 of cam bearing caps 1 of different specifications and sizes is different, in order to ensure that the first positioning pin 5110 and the second positioning pin 5210 can be accurately withdrawn from the mounting holes 2 of the cam bearing cap 1, thereby avoiding the problem of tool collision at both ends of the mounting holes 2 during the finishing process, and thus ensuring the machining accuracy of the mounting holes 2.

[0077] In one embodiment, the cam bearing cover self-locking fixture 10 further includes a detection and reset assembly 700, which includes an I-shaped support base 710, a horizontal plate 720, and a detection rod 730. The I-shaped support base 710 is disposed in the hollow position 101. The first cylinder 5130 and the second cylinder 5230 are sequentially disposed on the top of the I-shaped support base 710. The horizontal plate 720 is mounted between the first cylinder 5130 and the second cylinder 5230, and both ends of the horizontal plate 720 are respectively connected to the power output end of the first cylinder 5130 and the power output end of the second cylinder 5230.

[0078] The detection rod 730 is fixedly installed on the horizontal plate 720. The top of the I-shaped support 710 is provided with a gas detection channel 7101. The end of the detection rod 730 is aligned with one end of the gas detection channel 7101, and the other end of the gas detection channel 7101 is connected to a gas detection device.

[0079] It is understandable that, since the horizontal plate 720 is mounted between the first cylinder 5130 and the second cylinder 5230, and both ends of the horizontal plate 720 are connected to the power output ends of the first cylinder 5130 and the second cylinder 5230 respectively, when the first cylinder 5130 and the second cylinder 5230 synchronously drive the first positioning pin 5110 and the second positioning pin 5210 to slide downwards to exit the assembly hole 2 of the cam bearing cover 1, the horizontal plate 720 will move along with the first positioning pin 5110 and the second positioning pin 5210, thereby driving the detection rod. The end of 730 abuts against one port of the air detection channel 7101, so that the air detection device detects the change in air pressure in the air detection channel 7101, converts the air pressure change signal into an electrical signal and transmits it to the PLC program control system. The PLC program control system controls the first cylinder 5130 and the second cylinder 5230 to stop moving, thus determining that the first positioning post 5110 and the second positioning post 5210 have been reset in place, that is, ensuring that the first positioning post 5110 and the second positioning post 5210 can be completely withdrawn from the assembly hole 2 of the cam bearing cover 1.

[0080] It should be noted that the working principle of the gas detection device using a gas sensor for detection, and the working principle of the PLC program control system controlling the first cylinder 5130 and the second cylinder 5230, are existing technologies and will not be described in detail here.

[0081] Furthermore, in order to improve the positioning effect of the cam bearing cover 1 when it is placed in the clamping position 201 for positioning and clamping, thereby ensuring the machining accuracy of the assembly hole 2.

[0082] like Figure 10 and Figure 11 As shown, in another embodiment, the cam bearing cover self-locking positioning fixture 10 further includes a clamping and limiting component 800; the clamping and limiting component 800 includes a guide seat 810, a slider 820, and a contoured chuck 830; the guide seat 810 has a guide through hole 8101, the guide seat 810 is located between the self-locking clamping mechanism 300 and the clamping table 200, the slider 820 and the contoured chuck 830 are slidably disposed in the guide through hole 8101, one end of the slider 820 is connected to the other end of the positioning top rod 3310, and the other end of the slider 820 is detachably connected to the contoured chuck 830, the contoured chuck 830 is used to abut and limit the end side of the cam bearing cover 1.

[0083] It is understandable that the contouring chuck 830 can be designed to conform to the outer contour of the end side of the cam bearing cover 1, so that when the positioning push rod 3310 pushes the slider 820 and the contouring chuck 830 to slide towards the end side of the cam bearing cover 1, the contouring chuck 830 can better clamp the cam bearing cover 1; moreover, the other end of the slider 820 is detachably connected to the contouring chuck 830, so that the user can replace the contouring chuck 830 with different shapes according to the outer contour of the end side of the cam bearing cover 1 to adapt to the clamping and positioning of cam bearing covers 1 with different shapes and contours, thus effectively improving the adaptability of the cam bearing cover self-locking positioning fixture 10.

[0084] Furthermore, two spring members are installed between the other end of the slider 820 and the contour chuck 830, forming an elastic connection between the other end of the slider 820 and the contour chuck 830. In this way, by pre-leaving a sufficient sliding gap between the guide hole 8101 and the contour chuck 830, the contour chuck 830 has an automatic adjustment margin when it abuts against the end of the cam bearing cover 1, thereby effectively avoiding the risk of deformation caused by excessive clamping (excessive compression) of the cam bearing cover 1 by the contour chuck 830, thus ensuring the machining accuracy of the assembly hole 2.

[0085] This application also provides a die-casting processing apparatus, including the cam bearing cover self-locking fixture 10 described in any of the above embodiments.

[0086] In this embodiment, the die-casting processing device uses the aforementioned cam bearing cover self-locking fixture to position and clamp the cam bearing cover before performing precision machining. This effectively avoids the risk of deformation caused by the cam bearing cover being directly subjected to large forces, thus ensuring the machining accuracy of the assembly holes.

[0087] This application also provides a die-casting part, which is processed using the above-described die-casting processing apparatus.

[0088] Compared with the prior art, this disclosure has at least the following advantages:

[0089] Since both the positioning rod and the stop are elastically slidably mounted on the mounting base, and the sliding direction of the stop is at an angle to the sliding direction of the positioning rod, when the push rod and the push block are driven to move synchronously toward the clamping table to the first predetermined position by the telescopic end of the first telescopic drive, the positioning rod abuts against the end side of the cam bearing cover. At the same time, the first end of the stop abuts against the inclined surface and slides relative to the mounting base. Finally, the second end of the stop abuts against and locks against the positioning rod, thereby achieving self-locking of the positioning rod. Conversely, when the push rod and the push block are driven to move synchronously away from the clamping table to the second predetermined position by the telescopic end of the first telescopic drive, the positioning rod moves away from the end side of the cam bearing cover. At the same time, the stop slides back relative to the mounting base. Finally, the second end of the stop abuts against and moves away from the positioning rod, thereby achieving unlocking of the positioning rod. The self-locking fixture for the cam bearing cover of this invention has an ingenious structural design and good structural compactness. By designing the stroke of the positioning rod and the push block, the timing of the second end of the stop member abutting and locking the positioning rod is coordinated, preventing the positioning rod from sliding further and thus achieving a self-locking function. This effectively avoids the risk of deformation caused by the cam bearing cover being directly subjected to large forces, thereby ensuring the machining accuracy of the assembly hole.

[0090] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A self-locking fixture for a cam bearing cover, characterized in that, Includes a frame, a clamping table, a buffer assembly, and two self-locking clamping mechanisms arranged opposite each other; The clamping platform is mounted on the frame, and the clamping platform is provided with a clamping position for placing the cam bearing cover. Each of the self-locking clamping mechanisms includes a mounting base, a drive assembly, and a locking assembly; the mounting base has a sliding groove and is located on one side of the clamping table; the drive assembly includes a first telescopic drive member, a push rod, and a push block; the first telescopic drive member is located on the side of the mounting base opposite to the clamping table, one end of the push rod and one end of the push block are connected to the telescopic end of the first telescopic drive member, the other end of the push block is slidably connected to the sliding groove, and the end of the other end of the push block has an inclined surface; the locking assembly includes a positioning top rod and a stop member, the positioning top rod and the stop member are elastically slidably disposed on the mounting base, and the sliding direction of the stop member is at an angle to the sliding direction of the positioning top rod; the other end of the push rod is connected to the positioning top rod. When the telescopic end of the first telescopic drive member drives the push rod and the push block to move synchronously toward the clamping table to the first predetermined position, the positioning top rod abuts against the end side of the cam bearing cover, and at the same time the first end of the stop member abuts against the inclined surface and slides relative to the mounting seat, and the second end of the stop member abuts against and is locked to the positioning top rod, it is in a self-locking state at this time. When the telescopic end of the first telescopic drive member drives the push rod and the push block to move synchronously away from the clamping table to the second predetermined position, the positioning top rod leaves the end side of the cam bearing cover, and at the same time the stop member slides back relative to the mounting seat, and the second end of the stop member abuts against the positioning top rod, at this time it is in the unlocked state; The mounting base has a first through hole and a first countersunk hole connected in sequence; one end of the positioning rod is located in the first countersunk hole, and a first return spring is movably sleeved on one end of the positioning rod; the other end of the positioning rod slides through the first through hole; the other end of the push rod extends into the first countersunk hole and abuts against one end of the positioning rod; and / or, the sliding direction of the positioning rod is parallel to the power output direction of the first telescopic drive member. The buffer assembly includes a compression spring and a piston block; the compression spring and the piston block are sequentially disposed in the mounting base, one end of the compression spring abuts against one end of the positioning push rod, the other end of the compression spring abuts against the piston block, and the piston block is located between the compression spring and the push rod.

2. The self-locking positioning fixture for the cam bearing cover according to claim 1, characterized in that, The drive assembly further includes a connecting push plate, one end of the push rod and one end of the push block are respectively connected to one side of the connecting push plate, and the other side of the connecting push plate is fixedly installed on the telescopic end of the first telescopic drive member.

3. The self-locking positioning fixture for the cam bearing cover according to claim 1, characterized in that, The mounting base also has a second through hole and a second countersunk hole connected in sequence; the second through hole is connected to the first through hole; a second reset spring is movably sleeved on the second end of the stop member; the second end of the stop member is slidably connected to the second through hole; and the first end of the stop member is slidably connected to the second countersunk hole.

4. The self-locking positioning fixture for the cam bearing cover according to claim 1, characterized in that, The clamping position is fixedly equipped with multiple positioning supports, which are used to abut against the irregular contour surface of the cam bearing cover.

5. The self-locking positioning fixture for the cam bearing cover according to claim 1, characterized in that, The cam bearing cover self-locking fixture further includes a positioning component, which includes a first telescopic positioning member and a second telescopic positioning member. The first telescopic positioning member and the second telescopic positioning member are respectively provided with the assembly holes at both ends of the cam bearing cover. The first telescopic positioning member and the second telescopic positioning member slide through the frame and the clamping table in sequence, so that one end of the first telescopic positioning member extends to the assembly hole at one end of the cam bearing cover, and one end of the second telescopic positioning member extends to the assembly hole at the other end of the cam bearing cover.

6. The self-locking positioning fixture for the cam bearing cover according to claim 1, characterized in that, The cam bearing cover self-locking fixture further includes a pressing assembly; the pressing assembly includes a second telescopic drive, a lever seat, and a pressing member; the lever seat and the second telescopic drive are both located on the side of the clamping table, one end of the pressing member is rotatably connected to the telescopic ends of the lever seat and the second telescopic drive, and the other end of the pressing member extends above the clamping position, and the telescopic end of the second telescopic drive drives the other end of the pressing member to move away from or press down on the cam bearing cover.

7. A die-casting processing apparatus, characterized in that, The cam bearing cover self-locking fixture includes any one of claims 1-6.

8. A die-casting part, characterized in that, It is processed using the die-casting processing apparatus described in claim 7.

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