Rubber-cup press-fitting positioning device

Abstract

A rubber-cup press-fitting positioning device, comprising a positioning block (350) fixedly arranged on a mounting frame, wherein a feeding device (340) and an eccentric positioning mechanism are fixedly provided on the positioning block (350); and a through hole (354), which is configured to allow a press-fitting actuation assembly to pass therethrough, penetrates the positioning block (350). Automatic feeding of a rubber cup (200) and initial positioning between the rubber cup and the press-fitting actuation assembly are realized by means of the feeding device (340), and an axis offset of the rubber cup (200) on the press-fitting actuation assembly is realized by means of the eccentric positioning mechanism, so that the rubber cup (200) can pass through a guide cavity (333) in an approximately elliptical and inclined posture during a single-side press-fitting process, thereby reducing the horizontal projection area of the rubber cup (200), and preventing a radial contraction deformation; and the smoothness of posture transformation during the press-fitting process of the rubber cup (200) is improved, and the structural precision of the rubber cup (200) itself after press fitting is completed is ensured.

Description

Leather cup press-fitting positioning device

[0001] Cross-references

[0002] This application refers to Chinese patent application No. 202311858764.X, filed on December 30, 2023, entitled “A Leather Cup Press-Fitting Positioning Device,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present application relates to the technical field of brake booster system assembly, and in particular to a leather cup press-fit positioning device. Background Art

[0004] The automobile brake assist system is an important component of the modern automobile braking system. It is mainly used to reduce the force required by the driver when stepping on the brake pedal and improve the efficiency and stability of the braking system.

[0005] In the existing technology, the production of automobile brake assist systems mainly adopts manual or semi-automatic assembly methods. With the continuous development and application of intelligent and automated technologies, automated assembly has become a trend in the manufacturing industry with broad prospects and application value. The fully automatic assembly of automobile brake assist systems has also become an effective means for current automobile manufacturers to enhance competitiveness, reduce costs and improve product quality.

[0006] The inventors have discovered that the related art has at least the following problems: During the assembly of the brake assist system, a leather cup needs to be installed inside the valve hole of the valve block to ensure its sealing performance. Currently, the leather cup is assembled mainly by manual assembly and automatic machine assembly. Manual assembly is inefficient. In most automatic machine assembly schemes, the leather cup is deformed radially to reduce its volume and facilitate its transfer to the groove inside the valve hole. Due to the limited resilience of the leather cup itself, the leather cup is prone to bending damage during radial contraction and deformation, resulting in reduced fit with the groove and adversely affecting the overall performance of the valve body. In another eccentric single-sided press-fit scheme, the leather cup needs to be eccentrically positioned relative to the valve hole, resulting in low overall assembly efficiency. Moreover, because the radial length of the leather cup is reduced on one side relative to the guide channel and increased on the other side, the leather cup is prone to extrusion deformation when it is tilted through the guide channel, making it impossible to ensure the correct press-fit posture of the leather cup.

[0007] Summary of the Invention

[0008] The purpose of some embodiments of the present application is to provide a leather cup press-fitting positioning device, comprising a positioning block fixedly arranged on a mounting frame, a feeding device and an eccentric positioning mechanism fixedly provided on the positioning block: a through-hole for the press-fitting actuator to pass through is provided on the positioning block, a guide member is fixedly provided on the end face of the positioning block close to the mounting valve, and a guide cavity connected to the through-hole is provided axially through the guide member; a clamping groove coaxial with the guide cavity and capable of press-fitting the leather cup on one side is provided on the press-fitting actuator, and a deflection guide groove connected to the guide cavity and eccentric is provided on the end face of the guide member away from the mounting valve; wherein the feeding device is used to move the leather cup to a corresponding position coaxial with the guide cavity, and the eccentric positioning mechanism can move the leather cup toward the side close to the central axis of the deflection guide groove when the leather cup is mounted on the press-fitting actuator.

[0009] For example, in the above-mentioned leather cup press-fitting positioning device, the positioning block is provided with a slide groove communicating with the through hole, and the feeding device includes a feeding cylinder and a guide plate fixedly arranged on the mounting frame;

[0010] A feeding chute connected to the chute is provided in the guide plate, and a feeding push plate is fixed on the telescopic end of the feeding cylinder and is slidably arranged in the feeding chute and can be slidably connected to the chute;

[0011] Wherein, the guide plate is provided with a discharge port which is connected with the feeding trough and is used for placing the leather cup, and the feeding push plate can push the leather cup in the feeding trough to be coaxial with the through hole.

[0012] For example, in the above-mentioned leather cup press-fitting and positioning device, the feeding device further includes a feeding slide rail fixedly connected to the mounting frame, and the feeding push plate is slidably connected to the feeding slide rail.

[0013] For example, in the above-mentioned leather cup press-fitting positioning device, the eccentric positioning mechanism includes a positioning cylinder fixedly arranged on the positioning block, and a positioning push plate slidably connected to the slide groove is fixed on the telescopic end of the positioning cylinder.

[0014] For example, in the above-mentioned leather cup press-fitting positioning device, the positioning push plate of the feeding device and / or the feeding push plate of the eccentric positioning mechanism are arranged near one end of the perforation to be in a concave arc shape that matches the outer circular shape of the leather cup.

[0015] For example, the above-mentioned leather cup press-fitting positioning device further includes an oil spraying assembly for spraying oil to lubricate the leather cup in the positioning block.

[0016] For example, in the above-mentioned leather cup press-fitting positioning device, the oil injection assembly includes a first oil injector fixedly arranged on the positioning block, and a first oil passage is provided between the oil injection port of the first oil injector and the inner wall of the slide groove.

[0017] The first oil circuit and the connecting opening of the slide groove are symmetrical about the central axis of the through hole, and the first oil injector can spray oil to lubricate the outer peripheral surface of the leather cup through the first oil circuit.

[0018] For example, in the aforementioned cup press-fit positioning device, the oil injection assembly includes a second oil injector fixedly mounted on the mounting frame, and a second oil passage communicating with the oil injection port of the second oil injector is provided between the positioning block and the inner wall of the slideway on the side away from the mounting valve;

[0019] There are a plurality of communicating openings between the second oil circuit and the slide groove in a circular array about the central axis of the perforation, and the second oil injector can spray oil to lubricate the top of the leather cup through the second oil circuit.

[0020] For example, in the aforementioned leather cup press-fitting positioning device, a sealing groove surrounding the through hole and coaxial with the through hole is provided between the positioning block and the mounting frame, and a sealing ring is embedded in the sealing groove;

[0021] The second oil passage is located between the through hole and the sealing groove, and the sealing ring abuts against the mounting frame and the bottom wall of the sealing groove at both ends of the through hole in the axial direction.

[0022] For example, in the above-mentioned leather cup press-fitting positioning device, the guide member includes a positioning portion fixedly provided on the end surface of the positioning block close to the mounting valve, and a guide portion fixedly provided on an end of the positioning portion away from the positioning block and coaxial with the positioning portion;

[0023] The guide cavity is provided through the positioning portion and the guide portion, and the deflection guide groove is provided on the end surface of the positioning portion away from the guide portion and is communicated with the guide cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0025] FIG1 is a structural diagram of a cup assembly station according to an embodiment of the present application;

[0026] FIG2 is a structural diagram of the cup assembly station according to an embodiment of the present application with the “outer box 120” hidden;

[0027] FIG3 is a structural diagram of the “lifting and lowering adjustment mechanism 400” in the cup assembly station according to an embodiment of the present application;

[0028] FIG4 is a schematic structural diagram of the “press-fitting unit 300” of the cup press-fitting device according to an embodiment of the present application;

[0029] FIG5 is a schematic structural diagram of the “press-fitting unit 300” of the cup press-fitting device according to an embodiment of the present application;

[0030] FIG6 is a schematic structural diagram of a cup press-fitting positioning device according to an embodiment of the present application;

[0031] FIG7 is a cross-sectional view of the structure of the cup press-fitting positioning device according to an embodiment of the present application;

[0032] FIG8 is a schematic structural diagram of a “positioning block 350” in a cup press-fitting positioning device according to an embodiment of the present application;

[0033] FIG9 is a schematic structural diagram of the “first guide member 330 ” in the cup press-fitting positioning device according to an embodiment of the present application;

[0034] FIG10 is a schematic structural diagram of the “press-fitting execution assembly” portion of the cup press-fitting device according to an embodiment of the present application;

[0035] FIG11 is a cross-sectional view of the structure of the “press-fitting actuator” portion of the cup press-fitting device according to an embodiment of the present application;

[0036] FIG12 is an enlarged schematic diagram of the structure of the “positioning mandrel limiting end portion 3702 ” of the cup press-fitting device according to an embodiment of the present application;

[0037] FIG13 is a schematic structural diagram of the “intermediate pressure member 371 ” in the cup press-fitting device according to an embodiment of the present application;

[0038] FIG14 is a schematic structural diagram of the “shaping unit 500” portion of the cup shaping device according to an embodiment of the present application;

[0039] FIG15 is a schematic structural diagram of the “shaping unit 500” portion of the cup shaping device according to an embodiment of the present application;

[0040] FIG16 is a cross-sectional view of the structure of the “second guide member 520 ” in the cup shaping device according to an embodiment of the present application;

[0041] FIG17 is a schematic structural diagram of a “shaping member 560” in a cup shaping device according to an embodiment of the present application;

[0042] FIG18 is a structural cross-sectional view of the “installation valve 600 ” according to an embodiment of the present application.

[0043] Figure 1: Workbench 110, outer box 120, positioning tool 130, leather cup 200, press unit 300, first mounting frame 301, first support seat 302, first lifting cylinder 311, second lifting cylinder 312, third lifting cylinder 313, first connecting member 314, second connecting member 315, first guide rail 316, second guide rail 317, first injector 321, second injector 322, first guide member 330, fixed Positioning part 331, guide part 332, guide cavity 333, deflection guide groove 334, feeding device 340, feeding cylinder 341, feeding push plate 342, guide plate 343, discharge port 344, feeding slide rail 345, positioning block 350, sealing ring 351, sealing groove 352, first oil circuit 353, perforation 354, slide groove 355, second oil circuit 356, positioning cylinder 361, positioning push plate 362, positioning mandrel 370, connecting shaft Part 3701, limit end 3702, accommodating cavity 3703, elastic member 3704, intermediate pressure member 371, connecting slide 3711, pressure rod 3712, limit member 372, side pressure member 373, support plate 374, through slot 375, lifting adjustment mechanism 400, base 410, lifting motor 420, screw 430, lifting platform 440, lifting slide rail 450, mounting block 460, shaping unit 500, second support seat 511 , the second mounting frame -512, the connecting frame -513, the second guide member -520, the driving motor -530, the driving wheel -531, the telescopic cylinder -540, the driven wheel -541, the guide rod -551, the slide -552, the top plate -553, the shaping member -560, the telescopic part -561, the cavity -562, the retracting plate -563, the shaping convex part -564, the spline shaft -570, the belt -580, the mounting valve -600, the valve body -610, the valve hole -620, and the embedded groove -630. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of this application more clear, some embodiments of this application are further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain this application and are not used to limit this application.

[0045] The following is a detailed description of the leather cup pressing method and device provided in the embodiments of the present application through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0046] As shown in Figures 1 to 17, an embodiment of the present application provides a leather cup assembly station, including a workbench 110, two positioning fixtures 130 fixedly set on the workbench 110 and used to position and install the valve 600, a leather cup pressing device installed on the workbench 110 and located at corresponding positions of the two positioning fixtures 130, and a leather cup shaping device.

[0047] Among them, two lifting adjustment mechanisms 400 are fixedly provided on the workbench 110 at corresponding positions of the two positioning toolings 130. The leather cup pressing device includes one of the lifting adjustment mechanisms 400 and a pressing unit 300 installed on the lifting end of the lifting adjustment mechanism 400. The leather cup shaping device includes another lifting adjustment mechanism 400 and a shaping unit 500 installed on the lifting end of the lifting adjustment mechanism 400.

[0048] It can be understood that, as shown in Figure 18, the mounting valve 600 includes a valve body 610 and a valve hole 620 arranged on the valve body 610. A plurality of embedding grooves 630 for mounting the leather cup 200 are arranged in an axial array on the inner wall of the valve hole 620. The leather cup pressing device is used to press the leather cup 200 into the embedding groove 630 in the mounting valve 600 at the corresponding position. The leather cup shaping device is used to shape the leather cup 200 after installing the leather cup 200 in the embedding groove 630 in the mounting valve 600 at the corresponding position so that it better fits with the embedding groove 630.

[0049] As shown in FIG1 , the outer box 120 is fixedly mounted on the workbench 110 . The outer box 120 forms a working space for accommodating the cup pressing device and the cup shaping device.

[0050] As shown in Figure 2, the lifting and adjusting mechanism 400 includes a base 410 fixedly set on the workbench 110, a lifting motor 420 is fixedly provided on the base 410, a screw 430 rotatably connected to the base 410 is fixedly provided on the rotating output end of the lifting motor 420, and a lifting platform 440 is threadedly connected to the screw 430.

[0051] The axial direction of the screw rod 430 is along the vertical direction. Two lifting rails 450 are symmetrically and fixedly provided on the base 410 with respect to the screw rod 430 . Two sets of mounting blocks 460 are slidably provided on the two lifting rails 450 .

[0052] The lifting platform 440 and the mounting block 460 are fixedly connected to the pressing unit 300 of the leather cup pressing device or the shaping unit 500 of the leather cup shaping device.

[0053] In an embodiment of the present application, a leather cup assembly station as described above is adopted. When the lifting motor 420 drives the screw 430 to rotate, the lifting platform 440 can perform a lifting action on the screw 430, thereby driving the pressing unit 300 or the shaping unit 500 installed on the lifting platform 440 to lift and adjust the height. At the same time, the mounting block 460 fixedly connected to the pressing unit 300 or the shaping unit 500 moves synchronously on the lifting rail 450 at the corresponding position, thereby ensuring the lifting and lowering stability of the pressing unit 300 or the shaping unit 500.

[0054] It can be understood that the lifting structure of the lifting adjustment mechanism 400 is not limited to the above-mentioned one. For example, a lifting cylinder or a lifting connecting rod structure driven by a power device can be directly adopted. As long as the lifting drive of the pressing unit 300 or the shaping unit 500 can be achieved, it will not be elaborated here.

[0055] As shown in FIG. 1 to FIG. 13 , an embodiment of the present application provides a leather cup press-fitting device, comprising a lifting adjustment mechanism 400 and a press-fitting unit 300 fixedly mounted on the lifting end of the lifting adjustment mechanism 400 .

[0056] The press-fitting unit 300 includes a first mounting frame 301 fixedly connected to the lifting end of the lifting adjustment mechanism 400, a first guide member 330 fixedly arranged on the first mounting frame 301, and a power execution component. The output end of the power execution component is connected to a press-fitting execution component, and a through-channel for the press-fitting execution component is provided in the first guide member 330.

[0057] The press-fitting execution assembly includes a positioning core shaft 370, a middle pressure part 371, and a side pressure part 373, which are respectively driven to rise and fall by the power execution assembly. The positioning core shaft 370 is coaxial with the first guide part 330 and a limit part 372 is fixedly provided on the outer circular surface. The limit part 372 and the positioning core shaft 370 are provided with a card groove for installing the leather cup 200 near one end of the workbench 110.

[0058] Among them, the outer diameter of the first guide member 330 matches the inner diameter of the valve hole 620 of the mounting valve 600, the medium pressure member 371 and the side pressure member 373 can perform lifting and lowering actions along the outer cylindrical surface of the positioning core shaft 370, the limit member 372 and the side pressure member 373 are located on the opposite side of the medium pressure member 371, and the projection of the medium pressure member 371, the limit member 372 and the side pressure member 373 on the horizontal plane is specifically a ring that is coaxial with the positioning core shaft 370 and matches the end face of the leather cup 200.

[0059] During operation, the first guide member 330 of the press-fitting unit 300 is lifted and moved to the corresponding position of the embedding groove 630 of the installation valve 600 through the lifting and adjusting mechanism 400. The lower end of the first guide member 330 is flush with the upper end of the embedding groove 630, and the leather cup 200 is eccentrically installed in the groove of the limiting member 372 and the positioning core shaft 370, that is, the central axis of the leather cup 200 is biased to the side of the side pressure member 373. At this time, the middle pressure member 371 and the side pressure member 373 are located on the side of the groove away from the workbench 110. The power execution component drives the positioning core shaft 370 and the limiting member 372 to descend and drives the leather cup 200 to move to the corresponding position of the embedding groove 630. When the positioning core shaft 370 and the limiting member 372 pass through the first guide member 330, During the process, the leather cup 200 is in an inclined state under the interference of the inner wall of the guide channel, thereby reducing the projected area on the horizontal plane so that it can pass through the guide channel. After the positioning core shaft 370 and the limiter 372 have finished moving, the action execution component drives the middle pressure component 371 to descend until it is close to one end of the workbench 110 and is flush with the limiter 372 close to the end of the workbench 110. During the descent process, the middle pressure component 371 can resist the middle of the leather cup 200, thereby converting the middle of the leather cup 200 from an inclined state to a horizontal state. After the middle pressure component 371 has finished moving, the action execution component drives the side pressure component 373 to descend until it is close to one end of the workbench 110 and is flush with the limiter 372 close to the end of the workbench 110. During the descent process, the end of the leather cup 200 can contact the area on the side away from the limit member 372, so that the end of the leather cup 200 away from the area on the side of the limit member 372 is converted from an inclined state to a horizontal state. At this point, the leather cup 200 is completely in a horizontal state. Under the action of the inner wall of the embedding groove 630 and its own elastic force, the leather cup 200 will be embedded in the embedding groove 630 and coaxial with the first guide member 330; after the leather cup 200 is pressed into place, the positioning core shaft 370, the limit member 372, the middle pressure member 371, and the side pressure member 373 are reset under the drive of the power execution component, and the height of the pressing unit 300 is adjusted by the lifting and adjusting mechanism 400, so that the leather cup 200 can be pressed into the embedding grooves 630 of different heights in the installation valve 600.

[0060] In an embodiment of the present application, the above-mentioned leather cup pressing device is used to eccentrically position the leather cup 200, and the leather cup 200 is pressed into the installation valve 600 through a three-stage drive. During the pressing process, the leather cup 200 is driven in the first stage to pass through the guide channel in an inclined state, reducing its projected area on the horizontal plane, avoiding bending and deformation caused by radial compression of the leather cup 200 in traditional pressing means, and the radial step-by-step horizontal reset of the leather cup 200 is achieved through the second and third stage drives, making the reset of the leather cup 200 smoother and less prone to wrinkles, further improving the structural integrity of the leather cup 200 after pressing, and ensuring the matching accuracy of the leather cup 200 and the installation valve 600.

[0061] As shown in FIG. 4 , the power execution assembly includes a first lifting cylinder 311 , a second lifting cylinder 312 , and a third lifting cylinder 313 fixedly mounted on the first mounting frame 301 .

[0062] Among them, the telescopic end of the first lifting cylinder 311 is fixedly connected to the positioning core shaft 370, the telescopic end of the second lifting cylinder 312 is fixedly connected to the side pressure piece 373, and the telescopic end of the third lifting cylinder 313 is fixedly connected to the middle pressure piece 371.

[0063] It is understandable that the driving form of the power execution component is not limited to the above one, as long as it can realize the lifting and lowering drive of the positioning core shaft 370, the middle pressure part 371, and the side pressure part 373 respectively, which will not be elaborated here.

[0064] As shown in FIG4 , the power execution assembly further includes a first guide rail 316 and a second guide rail 317 fixedly mounted on the first mounting frame 301 and located at positions corresponding to the second lifting cylinder 312 and the third lifting cylinder 313 , respectively.

[0065] Among them, the first guide rail 316 and the second guide rail 317 are coaxial with the positioning core shaft 370, and the first guide rail 316 is slidingly provided with a first connecting member 314 fixedly connected to the side pressure member 373, and the second guide rail 317 is fixedly provided with a second connecting member 315 fixedly connected to the middle pressure member 371.

[0066] It can be understood that the sliding guidance of the first guide rail 316 and the first connecting member 314, and the second guide rail 317 and the second connecting member 315 can improve the lifting and lowering driving stability of the side pressure member 373 and the middle pressure member 371.

[0067] As shown in Figures 10 to 12, the positioning core shaft 370 includes a connecting shaft portion 3701 fixedly connected to the telescopic end of the first lifting cylinder 311 and a limiting end portion 3702 fixedly arranged at one end of the connecting shaft portion 3701 away from the first lifting cylinder 311.

[0068] A slot for mounting the leather cup 200 is formed between the limiting end portion 3702 and the limiting member 372 .

[0069] As shown in Figures 10 to 12, a receiving cavity 3703 connected to the card slot is provided in the connecting shaft portion 3701, a support plate 374 is elastically hinged in the receiving cavity 3703, and a through groove 375 that passes through the receiving cavity 3703 is provided on the limiting member 372. The support plate 374 can pass through the through groove 375 to the outside of the limiting member 372 at the end away from the workbench 110, and can swing radially along the connecting shaft portion 3701 in the card slot at the end close to the workbench 110.

[0070] Among them, the swing plane of the support plate 374 is located on the eccentric symmetry plane of the leather cup 200. The support plate 374 is provided with a guide inclined portion that can abut against the intermediate pressure piece 371 at the end away from the workbench 110, and a reset protrusion that can abut against the inner ring of the leather cup 200 at the end close to the workbench 110.

[0071] Initially, the middle pressure piece 371 is located on the side of the support plate 374 away from the workbench 110. Under the action of its own hinged elastic force, the reset protrusion of the support plate 374 close to the workbench 110 does not extend out of the slot, and the guiding inclined portion away from the workbench 110 passes through the through slot 375 to the outside of the limit piece 372; when the leather cup 200 is eccentrically arranged in the slot and the middle pressure piece 371 moves toward the side close to the workbench 110, the middle pressure piece 371 abuts against the guiding inclined portion of the support plate 374 and drives the guiding inclined portion of the support plate 374 to retract to the accommodating cavity 3 In 703, the support plate 374 accumulates elastic potential energy and the reset protrusion close to one end of the workbench 110 contacts the inner ring of the leather cup 200 and drives the leather cup 200 to move away from the side pressure piece 373, that is, during the descending process of the middle pressure piece 371, the leather cup 200 is assisted to be reset by the support plate 374, so that the leather cup 200 can be coaxial with the positioning core shaft 370 during the press-fitting process of the middle pressure piece 371 and the side pressure piece 373; after the press-fitting is completed, the middle pressure piece 371 is reset, and the support plate 374 can be reset under the action of its own hinged elastic force.

[0072] In the embodiment of the present application, the above-mentioned leather cup pressing device is adopted, and the support plate 374 cooperates with the middle pressure piece 371 to realize auxiliary resetting of the leather cup 200 during the segmented pressing process, further improving the horizontal resetting smoothness of the leather cup 200 during the pressing process.

[0073] As shown in FIG. 11 , an elastic member 3704 is fixedly provided between an end surface of the middle pressure member 371 close to the side pressure member 373 and an inner wall of a corresponding side of the accommodating cavity 3703 .

[0074] It is understandable that the elastic member 3704 can be specifically configured as an elastic member such as a columnar spring, a retaining spring, or elastic rubber, as long as the elastic reset of the support plate 374 can be achieved, and details will not be given here.

[0075] As shown in FIG. 13 , the intermediate pressure member 371 includes a connecting slide 3711 fixedly connected to the second connecting member 315 and two pressure rods 3712 symmetrically and fixedly arranged on one side of the connecting slide 3711 close to the workbench 110 .

[0076] The engaging sliding portion 3711 can slide along the outer circumferential surface of the limiting member 372 and abut against the guiding inclined portion of the supporting plate 374 .

[0077] It can be understood that the limiting member 372 and the side pressure member 373 are respectively located on the opposite sides of the middle pressure member 371, and the two pressure rods 3712 are respectively located in the gaps on both sides of the limiting member 372 and the side pressure member 373, thereby achieving pressure on the middle part of the leather cup 200, ensuring that the leather cup 200 is evenly stressed and the horizontal reset is more stable.

[0078] As shown in FIG. 5 , a first supporting seat 302 , which is fixedly connected to the lifting platform 440 and the mounting block 460 , is fixedly provided on the first mounting frame 301 .

[0079] As shown in FIG. 4 and FIG. 5 , the first mounting frame 301 is further provided with an oil spraying assembly for lubricating the surface of the leather cup 200 .

[0080] As shown in FIG. 4 and FIG. 5 , the first mounting frame 301 is further provided with a leather cup press-fitting positioning device for eccentrically positioning the leather cup 200 .

[0081] As shown in Figures 4 to 9, an embodiment of the present application provides a leather cup press-fitting positioning device, including a positioning block 350 fixedly provided on a first mounting frame 301, on which a feeding device 340 and an eccentric positioning mechanism are fixedly provided.

[0082] The positioning block 350 is provided with a through hole 354 for pressing the actuator through. A first guide member 330 is fixedly provided on the end face of the positioning block 350 close to the workbench 110. The first guide member 330 is provided with a guide cavity 333 that is connected to the through hole 354 along the axial direction.

[0083] Among them, the press-fitting execution component is provided with a clamping groove which is coaxial with the guide cavity 333 and can press-fit the leather cup 200 on one side. The first guide member 330 is close to the feeding device 340 and the eccentric positioning mechanism. A deflection guide groove 334 is provided on the end face on one side which is connected to the guide cavity 333 and is eccentric. The feeding device 340 is used to move the leather cup 200 to a corresponding position coaxial with the guide cavity 333. The eccentric positioning mechanism can move the leather cup 200 to the side close to the central axis of the deflection guide groove 334 when the leather cup 200 is installed in the press-fitting execution component.

[0084] In an embodiment of the present application, the above-mentioned leather cup press-fitting positioning device is adopted, and the automatic loading of the leather cup 200 and the initial positioning with the press-fitting execution component are realized through the feeding device 340. The axis offset of the leather cup 200 on the press-fitting execution component is realized through the eccentric positioning mechanism, so that the leather cup 200 can pass through the guide cavity 333 in an approximately elliptical inclined posture during the unilateral press-fitting process, thereby reducing the horizontal projection area of ​​the leather cup 200 and avoiding radial shrinkage deformation. At the same time, under the inclined guiding action of the deflection guide groove 334, the smoothness of the posture change of the leather cup 200 during the press-fitting process is improved, thereby ensuring the structural accuracy of the leather cup 200 after the press-fitting is completed.

[0085] As shown in Figures 4 to 8, the positioning block 350 is provided with a slide groove 355 connected to the through hole 354, and the feeding device 340 includes a feeding cylinder 341 and a guide plate 343 fixedly arranged on the first mounting frame 301, and a loading trough connected to the slide groove 355 is provided in the guide plate 343, and a feeding push plate 342 is fixed on the telescopic end of the feeding cylinder 341, which is slidably arranged in the loading trough of the guide plate 343 and can be slidably connected to the slide groove 355.

[0086] The guide plate 343 is provided with a discharge port 344 that passes through the feeding chute and is used to place the leather cup 200. The feeding push plate 342 can push the leather cup 200 placed in the feeding chute through the discharge port 344 into the slide groove 355 and make it coaxial with the through hole 354.

[0087] It is understandable that when loading, the staff places the leather cup 200 in the loading trough through the discharge port 344, and drives the feeding push plate 342 to move and resist the leather cup 200 through the telescopic driving of the feeding cylinder 341, thereby realizing the axial initial positioning of the leather cup 200 and the press-fitting actuator.

[0088] As shown in FIG. 4 to FIG. 7 , the feeding device 340 further includes a feeding rail 345 fixedly connected to the first mounting frame 301 , and the feeding push plate 342 is slidably connected to the feeding rail 345 .

[0089] It can be understood that the sliding cooperation between the feeding slide rail 345 and the feeding push plate 342 can improve the stability of the pushing action of the feeding push plate 342.

[0090] As shown in FIG. 4 to FIG. 8 , the eccentric positioning mechanism includes a positioning cylinder 361 fixedly provided on the positioning block 350 , and a positioning push plate 362 slidably connected to the slide groove 355 is fixedly provided on the telescopic end of the positioning cylinder 361 .

[0091] It can be understood that when the feeding device 340 moves the leather cup 200 into the slide groove 355 and makes it coaxial with the through hole 354, the press-fitting execution assembly passes through the leather cup 200 and the slot corresponds to the position of the leather cup 200. At this time, the feeding push plate 342 is reset, and the positioning push plate 362 is driven by the positioning cylinder 361 to move and push the leather cup 200, so that the leather cup 200 and the central axis of the press-fitting execution assembly are offset, thereby realizing the unilateral press-fitting of the leather cup 200.

[0092] As shown in FIG. 7 , one end of the positioning push plate 362 and / or the feeding push plate 342 close to the through hole 354 is configured to be in a concave arc shape that matches the outer circumferential shape of the leather cup 200 .

[0093] As shown in FIG. 4 to FIG. 8 , an oil spraying assembly is also included for performing oil spraying lubrication on the inner leather cup 200 of the positioning block 350 .

[0094] As shown in FIG. 4 to FIG. 8 , the oil injection assembly includes two first oil injectors 321 fixedly mounted on the positioning block 350 , and the oil injection ports of the two first oil injectors 321 are connected to the inner wall of the chute 355 , respectively, to form two first oil passages 353 .

[0095] The communicating ports of the two first oil passages 353 and the slide groove 355 are symmetrical about the central axis of the through hole 354 , and the first oil injector 321 can spray oil to lubricate the outer peripheral surface of the leather cup 200 through the first oil passages 353 .

[0096] In an embodiment of the present application, the above-mentioned leather cup press-fitting positioning device is adopted, and an oil injection assembly is set on the positioning block 350 to achieve surface lubrication of the leather cup 200. During the press-fitting process of the leather cup 200, the friction between the leather cup 200 and the surface of the first guide member 330 can be greatly reduced, which not only avoids the generation of friction wrinkles on the leather cup 200, but also facilitates the horizontal elastic reset of the leather cup 200 after the leather cup 200 reaches the corresponding position of the embedding groove 630, thereby further improving the assembly accuracy of the leather cup 200.

[0097] It is understandable that the number of the first oil injector 321 and the connecting openings of the first oil circuit 353 and the slide groove 355 is not limited to the above-mentioned one. In order to ensure uniform oiling of the outer peripheral surface of the leather cup 200, multiple connecting openings of the first oil circuit 353 and the slide groove 355 can be set in a circumferential annular array around the leather cup 200. As long as the lubrication effect of the outer peripheral surface of the leather cup 200 can be guaranteed, it will not be elaborated here.

[0098] As shown in Figures 4 to 8, the oil injection assembly also includes a second oil injector 322 fixedly arranged on the first mounting frame 301, and a plurality of second oil passages 356 connected to the oil injection port of the second oil injector 322 are provided between the positioning block 350 and the inner wall of the slide groove 355 away from the workbench 110.

[0099] The plurality of second oil passages 356 are arranged in a circular array about the central axis of the through hole 354 , and the second oil injector 322 can spray oil to lubricate the top of the leather cup 200 through the second oil passages 356 .

[0100] As shown in FIG. 6 , a sealing groove 352 surrounding the through-hole 354 and coaxial with the through-hole 354 is provided between the positioning block 350 and the first mounting frame 301 , and a sealing ring 351 is embedded in the sealing groove 352 .

[0101] The second oil passage 356 is located between the through hole 354 and the sealing groove 352 . The sealing ring 351 abuts against the first mounting frame 301 and the bottom wall of the sealing groove 352 at both axial ends of the through hole 354 .

[0102] It is understandable that the oil injection assembly between the positioning block 350 and the first mounting frame 301 can be sealed by the sealing ring 351 to avoid oil leakage and ensure the oil injection effect.

[0103] 9 , the first guide member 330 includes a positioning portion 331 fixedly disposed on the end surface of the positioning block 350 close to the workbench 110 , and a guide portion 332 fixedly disposed on an end of the positioning portion 331 away from the positioning block 350 and coaxial with the positioning portion 331 .

[0104] The guide cavity 333 is provided through the positioning portion 331 and the guide portion 332 , and the deflection guide groove 334 is provided on the end surface of the positioning portion 331 away from the guide portion 332 and communicates with the guide cavity 333 .

[0105] The embodiment of the present application provides a cup press-fitting method. The cup press-fitting device described above adopts the cup press-fitting method, including:

[0106] Step S1: Establish a through-channel that matches the inner diameter of the valve hole 620, with the protruding end of the through-channel flush with the proximal end of the embedding groove 630 relative to the through-channel; Step S2: Set a support limiter on the leather cup 200 relative to the proximal end of the through-channel; Step S3: When the leather cup 200 is outside the through-channel, set the leather cup 200 eccentric to the through-channel; Step S4: Apply a unilateral force to the end of the leather cup 200 near the central axis of the through-channel, driving the leather cup 200 to pass through the through-channel in an inclined posture and move the end near the central axis of the through-channel to the corresponding position of the embedding groove 630; Step S5: Apply pressure to the leather cup 200 in a predetermined direction on the side near the support limiter, driving the leather cup 200 to return from the inclined posture to a position perpendicular to the through-channel;

[0107] The predetermined direction is the extension direction from one end of the leather cup 200 close to the central axis of the through-channel to the central axis of the through-channel;

[0108] In an embodiment of the present application, the above-mentioned leather cup press-fitting method is adopted. Through the eccentric setting of the leather cup 200 and the guide channel and the unilateral press-fitting, the leather cup 200 can reach the installation position in the guide channel in an inclined posture. At the same time, the inclined part of the leather cup 200 is press-fitted and reset in sequence along the extension direction of the angle, so that the leather cup 200 is reset and embedded in the embedding groove 630 under the action of its own elasticity, avoiding the deformation caused by the radial contraction of the leather cup 200 and ensuring the assembly accuracy of the leather cup 200.

[0109] Step S1 further includes adjusting the relative position of the through-channel in the valve hole 620 based on the position of the embedding groove 630 .

[0110] Among them, for the press-fitting of the leather cup 200 with multiple embedding grooves 630 in a single valve hole 620, the press-fitting sequence is that the length of the guide channel extending into the valve hole 620 gradually decreases.

[0111] It is understandable that since there is still an assembly error between the leather cup 200 and the embedded groove 630 after the press-fitting is completed, the subsequent press-fitting cannot interfere with the leather cup 200 that has been press-fitted, thereby avoiding damage to the press-fitting execution component to the leather cup 200 that has been press-fitted.

[0112] Before step S4, the surface of the leather cup 200 is subjected to an oil spray lubrication treatment.

[0113] Wherein, after step S4, the method further includes applying a radial force to the end of the leather cup 200 close to the central axis of the threading channel, so as to drive the central axis of the leather cup 200 to move toward the side close to the central axis of the threading channel.

[0114] As shown in Figures 1, 2, and 14 to 18, the embodiment of the present application provides a leather cup shaping device, including a lifting adjustment mechanism 400 and a shaping unit 500 fixedly installed on the lifting end of the lifting adjustment mechanism 400.

[0115] The shaping unit 500 includes a second mounting frame 512 fixedly connected to the lifting end of the lifting adjustment mechanism 400, a second guide member 520 fixedly set on the second mounting frame 512 and with an outer diameter matching the inner diameter of the valve hole 620, and a shaping member 560 for shaping the leather cup 200. A positioning channel is provided through the second guide member 520, and the shaping member 560 can be telescopically arranged in the positioning channel and can rotate along the central axis of the positioning channel.

[0116] Among them, a shaping execution part is provided at one end of the shaping member 560 away from the second mounting frame 512. When the shaping member 560 is in a contracted state, the shaping execution part is located in the positioning channel. When the shaping member 560 is in an open state, the shaping execution part is located on the side of the positioning channel away from the second mounting frame 512 and the outer diameter matches the inner diameter of the leather cup 200.

[0117] During operation, the second guide member 520 of the shaping unit 500 is lifted and moved to the corresponding position of the embedding groove 630 of the installation valve 600 through the lifting and adjusting mechanism 400, and the shaping member 560 is in a retracted state. The lower end of the positioning channel of the second guide member 520 is just flush with the upper end of the embedding groove 630. At this time, the shaping member 560 extends out of the positioning channel, and the shaping execution part is located at the corresponding position of the leather cup 200 and opens to contact the inner ring of the leather cup 200. Then the shaping member 560 rotates to a predetermined angle, and the shaping execution end contacts the inner ring of the leather cup 200 and completely grinds the leather cup 200 into the embedding groove 630, completing the shaping action of the leather cup 200. After the shaping is completed, the shaping member 560 retracts into the positioning channel again, and the above-mentioned shaping process is repeated as the second guide member 520 is lifted and lowered.

[0118] In an embodiment of the present application, a leather cup shaping device as described above is adopted, and the leather cup 200 in the embedded groove 630 at different positions can be shaped by lifting and lowering the lifting and lowering adjustment mechanism 400. Since the shaping member 560 is telescopically arranged in the positioning channel, it will not interfere with the lifting and lowering positioning of the second guide member 520. When the second guide member 520 is positioned, the shaping member 560 extends out of the positioning channel and contacts the inner ring of the leather cup 200 through the shaping execution part. As the shaping execution part rotates, the leather cup 200 can be completely ground into the embedded groove 630, thereby improving the pressing accuracy of the leather cup 200.

[0119] It is understandable that, for shaping the leather cup 200 with multiple embedding grooves 630 in a single valve hole 620 , the shaping sequence is that the length of the positioning channel extending into the valve hole 620 gradually increases.

[0120] It is understandable that since there is still an assembly error between the leather cup 200 and the embedding groove 630 after the press-fitting is completed, the subsequent shaping cannot interfere with the unshaped leather cup 200, thereby avoiding the second guide member 520 from causing damage to the unshaped leather cup 200.

[0121] As shown in FIG. 14 and FIG. 15 , a telescopic driving device for driving the shaping member 560 to extend and retract and a rotation driving device for driving the shaping member 560 to rotate are fixedly provided on the second mounting frame 512 .

[0122] As shown in Figures 14 and 15, the rotation drive device includes a drive motor 530 fixedly arranged on the second mounting frame 512, a driving wheel 531 fixedly arranged on the rotation output end of the drive motor 530, and a driven wheel 541 rotatably arranged on the second mounting frame 512 and coupled to the shaping member 560.

[0123] A belt 580 is wound between the driving pulley 531 and the driven pulley 541 .

[0124] It is understandable that when the driving motor 530 drives the driving wheel 531 to rotate, the driving wheel 531 drives the driven wheel 541 to rotate through the belt 580, and when the driven wheel 541 rotates, it can drive the shaping member 560 to rotate to achieve a rotational shaping action.

[0125] As shown in Figures 14 and 15, the telescopic drive device includes a telescopic cylinder 540 fixedly mounted on the second mounting frame 512, and a spline shaft 570 rotatably mounted on the telescopic end of the telescopic cylinder 540 and fixedly connected to the shaping member 560.

[0126] The spline shaft 570 is coaxial with the driven wheel 541 and is spline-connected.

[0127] It can be understood that when the telescopic cylinder 540 drives the spline shaft 570 to extend and retract, the spline shaft 570 can drive the shaping member 560 to extend and retract in the second guide member 520 to achieve the conversion between the contracted state and the open state. At the same time, the spline shaft 570 is spline-connected to the driven wheel 541, so that the torque of the driven wheel 541 can be transmitted to the shaping member 560, thereby realizing the rotational drive of the shaping member 560.

[0128] It can be understood that the structure and coordination form of the rotary drive device and the telescopic drive device are not limited to the above-mentioned one. For example, the telescopic drive device can also be configured to drive the rotary drive device and the shaping member 560 to rise and fall synchronously. As long as the telescopic and rotational drive of the shaping member 560 can be realized, it will not be elaborated here.

[0129] As shown in FIG14 and FIG15 , a plurality of guide rods 551 are fixedly provided on the end surface of the second mounting frame 512 away from the second guide member 520 , and a top plate 553 is fixedly provided on the end surface of the plurality of guide rods 551 away from the second mounting frame 512 .

[0130] The telescopic cylinder 540 is fixedly arranged on the top plate 553 , and a slide 552 slidably connected to the guide rod 551 is fixedly provided on the telescopic end of the telescopic cylinder 540 .

[0131] It is understandable that when the telescopic cylinder 540 drives the shaping member 560 to extend or retract, the slide 552 can be moved and guided by the guide rod 551, thereby improving the telescopic stability of the shaping member 560.

[0132] As shown in FIG. 14 to FIG. 16 , a connecting frame 513 is fixedly provided on the end surface of the second mounting frame 512 close to the mounting valve 600 , and the second guide member 520 is fixedly provided on the connecting frame 513 .

[0133] As shown in FIG. 14 to FIG. 17 , the shaping member 560 includes a telescopic portion 561 fixedly connected to the spline shaft 570 and a shaping execution end.

[0134] The shaping execution end includes a plurality of retracting plates 563 fixedly arranged on one end of the telescopic portion 561 away from the connecting frame 513 and a shaping protrusion 564 fixedly arranged on one end of the retracting plates 563 away from the telescopic portion 561 .

[0135] Among them, multiple expansion and retraction plates 563 are arranged in a circular array about the central axis of the telescopic part 561, and the shaping protrusion 564 protrudes outward relative to the expansion and retraction plates 563 toward the side away from the central axis of the telescopic part 561 and the outer diameter matches the inner diameter of the leather cup 200.

[0136] In an embodiment of the present application, a leather cup shaping device as described above is adopted, and the shaping execution end is composed of a plurality of retracting and expanding plates 563. Since there are gaps between the plurality of retracting and expanding plates 563, when the shaping member 560 is in a contracted state and the shaping protrusion 564 contacts the inner wall of the positioning channel, the retracting and expanding plates 563 can be elastically deformed to be radially contracted.

[0137] As shown in FIG. 16 and FIG. 17 , the shaping protrusion 564 is provided with a guiding inclined surface at one end close to the telescopic portion 561 , which contacts and cooperates with the second guide member 520 at one end away from the connecting frame 513 .

[0138] It can be understood that when the shaping member 560 is converted from an open state to a contracted state, the shaping protrusion 564 can automatically retract through the abutment between the guiding slope and the corresponding end of the second guide member 520, thereby ensuring the working stability of the shaping execution end.

[0139] As shown in FIG. 16 and FIG. 17 , a cavity 562 is provided in the telescopic portion 561 along the axial direction.

[0140] It is understandable that by providing the cavity 562 in the telescopic portion 561 , the overall weight of the shaping member 560 can be reduced, thereby reducing the workload of the telescopic drive device and the rotation drive device, and improving the overall stability of the shaping device during operation.

[0141] As shown in FIG. 14 and FIG. 15 , a second supporting seat 511 fixedly connected to the lifting platform 440 and the mounting block 460 is fixedly provided on the second mounting frame 512 .

[0142] This application has at least the following beneficial effects:

[0143] 1. The automatic loading of the leather cup and its initial positioning with the press-fitting actuator are achieved through the feeding device. The axis offset of the leather cup on the press-fitting actuator is achieved through the eccentric positioning mechanism, so that the leather cup can pass through the guide cavity in an approximately elliptical tilted posture during the single-sided press-fitting process, thereby reducing the horizontal projection area of ​​the leather cup and avoiding radial shrinkage deformation. At the same time, the tilted guiding action of the deflection guide groove improves the smoothness of the posture change of the leather cup during the press-fitting process, ensuring the structural accuracy of the leather cup after the press-fitting is completed.

[0144] 2. The sliding cooperation between the feeding slide rail and the feeding push plate can improve the stability of the feeding push plate's pushing action;

[0145] 3. An oil spray assembly is provided on the positioning block to achieve surface lubrication of the leather cup. During the press-fitting process of the leather cup, the friction between the leather cup and the guide surface can be greatly reduced, which not only prevents the leather cup from generating friction wrinkles, but also facilitates the horizontal elastic reset of the leather cup after it reaches the corresponding position of the groove, further improving the assembly accuracy of the leather cup.

[0146] 4. The sealing ring can seal the oil injection assembly between the positioning block and the mounting frame to avoid oil leakage and ensure the oil injection effect.

[0147] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0148] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A cup packing positioning device, wherein, It includes a positioning block fixedly arranged on an installation frame, and a feeding device and an eccentric positioning mechanism are fixedly arranged on the positioning block: A perforation for a press-fitting execution component to pass through is provided through the positioning block. A guide member is fixedly arranged on the end face of the positioning block close to one side of the installation valve, and a guide cavity communicating with the perforation is provided through the guide member axially. A clamping groove coaxial with the guide cavity and capable of press-fitting one side of the leather cup is provided on the press-fitting execution component. A deflecting guide groove communicating with the guide cavity and eccentric is provided on the end face of the guide member away from the installation valve. Among them, the feeding device is used to move the leather cup to a corresponding position coaxial with the guide cavity, and the eccentric positioning mechanism can move the leather cup towards the side close to the central axis of the deflecting guide groove when the leather cup is installed on the press-fitting execution component.

2. The cup pressing and positioning device according to claim 1, wherein, A sliding groove communicating with the perforation is provided on the positioning block. The feeding device includes a feeding cylinder fixedly arranged on the installation frame and a guiding plate. A feeding groove communicating with the sliding groove is provided in the guiding plate. A feeding push plate slidably arranged in the feeding groove and capable of slidingly connecting with the sliding groove is fixedly arranged on the telescopic end of the feeding cylinder. Among them, a feeding port for placing the leather cup is provided on the guiding plate and communicates with the feeding groove. The feeding push plate can push the leather cup in the feeding groove to be coaxial with the perforation.

3. The cup pressing and positioning device according to claim 2, wherein, The feeding device further includes a feeding slide rail fixedly connected with the installation frame, and the feeding push plate is slidably connected with the feeding slide rail.

4. The cup packing and positioning device according to claim 1, wherein, The eccentric positioning mechanism includes a positioning cylinder fixedly arranged on the positioning block, and a positioning push plate slidably connected with the sliding groove is fixedly arranged on the telescopic end of the positioning cylinder.

5. A cup packing positioning device according to claim 2 or 4, wherein, The end of the feeding push plate of the feeding device and / or the feeding push plate of the eccentric positioning mechanism close to the perforation is arranged in a concave arc shape fitting the outer circular surface of the leather cup.

6. The cup packing positioning device according to claim 1, wherein, It further includes an oil spraying component for oil spraying and lubricating the leather cup inside the positioning block.

7. A cup pressing and positioning device according to claim 2 or 6, wherein, The oil spraying component includes a first oil sprayer fixedly arranged on the positioning block, and a first oil passage is communicated between the oil spraying port of the first oil sprayer and the inner wall of the sliding groove. Among them, the communication port of the first oil passage with the sliding groove is symmetrical about the central axis of the perforation, and the first oil sprayer can spray oil and lubricate the outer peripheral surface of the leather cup through the first oil passage.

8. A cup pressing and positioning device according to claim 2 or 6, wherein, The oil spraying component includes a second oil sprayer fixedly arranged on the installation frame, and a second oil passage communicating with the oil spraying port of the second oil sprayer is provided through the inner wall of the sliding groove on the side of the positioning block away from the installation valve. Among them, a plurality of communication ports of the second oil passage with the sliding groove are arranged in a circular array about the central axis of the perforation, and the second oil sprayer can spray oil and lubricate the top end of the leather cup through the second oil passage.

9. The cup pressing and positioning device according to claim 8, wherein, A sealing groove surrounding the perforation and coaxial with the perforation is provided between the positioning block and the installation frame, and a sealing ring is embedded in the sealing groove. Among them, the second oil passage is located between the perforation and the sealing groove, and both ends of the sealing ring in the axial direction of the perforation are respectively abutted against the installation frame and the bottom wall of the sealing groove.

10. A cup pressing and positioning device according to claim 1, wherein, The guide member includes a positioning portion fixedly arranged on the end face of the positioning block close to one side of the installation valve and a guiding portion fixedly arranged at one end of the positioning portion away from the positioning block and coaxial with the positioning portion. Among them, the guide cavity is provided through the positioning portion and the guiding portion, and the deflecting guide groove is provided on the end face of the positioning portion away from the guiding portion and communicates with the guide cavity.

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