Jacking device and positioning equipment

Abstract

The utility model relates to the technical field of automobile inspection tools, and discloses a jacking device, which is characterized in that a jacking part is rotatably and movably connected with a rotating part, a sliding part is arranged in the rotating part, and the jacking part is provided with a limiting stop block with a slope. When the jacking device is used, the rotating part is screwed, and the sliding part is propped against one side, close to the jacking part, of the slope; the rotating piece and the jacking piece rotate together as a whole, when the jacking piece abuts against the automobile part and the rotating piece continues to be screwed, due to resistance of the automobile part, the rotating piece continues to rotate, the jacking piece does not rotate, and the sliding piece slides along the slope until the sliding piece crosses the side, away from the jacking piece, of the slope, so that an operator has a slipping feeling; and when the rotating part is screwed continuously, the jacking and pressing part does not rotate along with the rotating part, so that the automobile part is prevented from being pressed and deformed. The utility model further provides positioning equipment which comprises a support, a movable block, a zero attaching block and the jacking device.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile testing fixture, in particular to a top pressure device and positioning equipment. BACKGROUND

[0002] After the automobile parts are produced, they need to be detected, and the automobile parts need to be positioned during detection. In positioning, the common top pressing type positioning device on the market is widely used in the technical field of automobile testing fixture. Some automobile parts need to be positioned by the upper surface of the product, so the zero block is arranged above, the top pressing piece is arranged below, and the pressing mode needs to be realized from below to above. The current top pressing piece is usually screwed upward, and when the top pressing piece is screwed, the top pressing piece moves upward due to the thread structure, so as to clamp the automobile part between the zero block and the top pressing piece support. Since it needs to be operated from below, it is limited by the operation space, and it is not easy to observe whether the top pressing piece is pressed on the automobile part, so the force is not easy to control, which leads to over-tightening and easy deformation of the automobile part.

[0003] The prior art discloses a kind of automobile door frame assembly guide groove positioning mechanism (CN215148292U), it is related to the technical field of parts positioning, including main frame, the main frame includes push-pull movable block and clamping assembly, the push-pull movable block is movably connected on the main frame, the clamping assembly includes lower pressing plate, chuck and at least one guide rod, the chuck is between the push-pull movable block and the lower pressing plate, the chuck includes zero block and pressing block, the zero block is connected on the push-pull movable block, the pressing block is connected on the lower pressing plate, the guide rod is connected with the push-pull movable block, the lower pressing plate is slidably connected on the guide rod drive, so that the pressing block is close to or away from the zero block. Although the threaded pin of the patent is arranged above, it is difficult to observe whether the pressing block is pressed on the automobile part because the pressing block is below the automobile part during use, which leads to over-tightening and easy deformation of the automobile part. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of top pressure device and positioning equipment that can prevent pressing deformation.

[0005] In order to achieve the above object, the utility model provides a top pressure device, including top pressure piece, rotating part and sliding part, the rotating part is equipped with containing groove, make the rotating part is the sleeve structure of one end opening, one end of top pressure piece inserts containing groove, the rotating part is connected with top pressure piece rotation, and the rotating part can move along the direction close to or away from top pressure piece, the sliding part is located in containing groove, and one end of sliding part is connected with the groove bottom of containing groove, the sliding part is located between the groove bottom of containing groove and top pressure piece, the sliding part deviates the rotation axis of rotating part and is arranged, one end of top pressure piece inserted containing groove is equipped with limit stop, one side of limit stop is equipped with slope, the slope is inclined from the side of limit stop and top pressure piece connection to the direction away from top pressure piece, the slope is located on the movement track of sliding part.

[0006] As a preferred scheme, the maximum moving distance of the rotating part relative to the top pressure piece is equal to the maximum thickness of the limit stop, and the length of the sliding part is equal to the difference between the depth of the containing groove and the maximum depth of the top pressure piece inserted into the rotating part.

[0007] As a preferred scheme, a reset spring is further included, the reset spring is located in the containing groove, and the reset spring is located between the groove bottom of the containing groove and the top pressure piece, and two ends of the reset spring are connected with the groove bottom of the containing groove and the top pressure piece respectively.

[0008] As a preferred scheme, a rotating shaft is further included, the top pressure piece is provided with a mounting hole, the rotating shaft is located in the containing groove, one end of the rotating shaft is connected with the groove bottom of the containing groove, and the other end of the rotating shaft is inserted into the mounting hole.

[0009] As a preferred scheme, one end of the sliding part close to the top pressure piece is an arc surface structure.

[0010] As a preferred scheme, the top pressure piece includes a limiting seat, a connecting rod and a pressure head, the limiting seat and the pressure head are connected at two ends of the connecting rod respectively, the limiting seat is used for being inserted into the containing groove, and the limit stop is arranged on an end face of the limiting seat away from the connecting rod.

[0011] As a preferred scheme, the outer side surface of the part of the top pressure piece inserted into the containing groove is surrounded by two opposite rectangular surfaces and two opposite circular arc surfaces.

[0012] As a preferred solution, the limiting block further comprises a limiting outer side, a limiting inner side, a limiting top surface and a limiting end surface, the limiting outer side, the limiting inner side, the limiting top surface, the limiting end surface and the slope enclose the limiting block, the limiting outer side and the limiting inner side are oppositely arranged, the limiting end surface is connected with the top pressing piece, the limiting outer side, the limiting inner side and the limiting top surface, the limiting top surface is connected with the limiting end surface, the limiting outer side, the limiting inner side and the slope, the slope is connected with the limiting top surface, the limiting outer side, the limiting inner side and the top pressing piece, and the limiting top surface is perpendicular to the rotation axis of the rotating piece.

[0013] The utility model also provides a positioning equipment, including support, movable block, zero paste block and above-mentioned top pressure device, movable block with support swing joint, zero paste block connects on movable block, top pressure device installs on support, and top pressure device is located zero paste block below, top pressure device top pressure piece is located the part outside containing groove and support screw connection, through rotating rotating piece makes top pressure device close or far from zero paste block.

[0014] As a preferred solution, the support comprises a support base, a first mounting block and a second mounting block, the first mounting block is arranged above the support base, the second mounting block is connected to the side of the support base, the movable block is reciprocally movably connected to the first mounting block, the moving direction of the movable block is arranged at an obtuse angle with the height direction of the support base, the top pressing piece is screw-connected with the second mounting block, and the moving direction of the top pressing device is arranged at an acute angle with the height direction of the support base.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] The utility model discloses a top pressure device, which comprises a rotating piece, a top pressing piece and a limiting block, the rotating piece is movably connected with the top pressing piece, the limiting block is arranged on the top pressing piece, and the limiting block is provided with a slope. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structure schematic diagram of top pressure device of the utility model embodiment.

[0018] Figure 2 is the internal schematic view of the top pressing device of the embodiment of the utility model.

[0019] Figure 3 is the exploded view of the top pressing device of the embodiment of the utility model.

[0020] Figure 4 is the structural schematic view of the rotating part of the embodiment of the utility model.

[0021] Figure 5 is the structural schematic view of the limiting seat and the limiting block of the embodiment of the utility model.

[0022] Figure 6 is the structural schematic view of the positioning equipment of the embodiment of the utility model.

[0023] Figure 7 is the use schematic view of the positioning equipment of the embodiment of the utility model.

[0024] In the figure, 1-top pressing part;101-mounting hole;102-limiting seat;103-connecting rod;104-pressing head;2-rotating part;201-receiving groove;202-via;3-sliding part;301-rolling ball;4-limiting block;401-inclined slope;402-limiting outer side;403-limiting inner side;404-limiting top surface;405-limiting end face;5-return spring;6-rotating shaft;7-bracket;701-stand;702-first mounting block;703-second mounting block;7031-first connecting part;7032-second connecting part;8-movable block;801-first locking hole;9-zero block;10-locking bolt. DETAILED DESCRIPTION

[0025] The specific embodiments of the utility model are described in detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0026] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the utility model, it is necessary to explain that, unless otherwise expressly provided and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements, for ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0028] In addition, in the description of the utility model, the meaning of "a plurality of" is two or more than two, unless otherwise specified.

[0029] Embodiment one

[0030] As Figures 1 to 5 The utility model discloses a kind of top pressure devices of preferred embodiment, including top pressure piece 1, rotating piece 2 and sliding piece 3, rotating piece 2 is provided with accommodating groove 201, so that rotating piece 2 is the sleeve structure of one end opening, one end of top pressure piece 1 is inserted into accommodating groove 201, rotating piece 2 is connected with top pressure piece 1 rotation, and rotating piece 2 can be moved along the direction close to or away from top pressure piece 1, sliding piece 3 is located in accommodating groove 201, and one end of sliding piece 3 is connected with the groove bottom of accommodating groove 201, sliding piece 3 is located between the groove bottom of accommodating groove 201 and top pressure piece 1, sliding piece 3 is arranged offset from rotating shaft 6 line of rotating piece 2, one end of top pressure piece 1 inserted into accommodating groove 201 is provided with limit stop 4, one side of limit stop 4 is provided with slope 401, slope 401 is inclined from the side of limit stop 4 and top pressure piece 1 connection to the direction away from top pressure piece 1, and slope 401 is located on the movement track of sliding piece 3.This embodiment is connected by rotating and movable with top pressure piece 1 and rotating piece 2, and sliding piece 3 is arranged in rotating piece 2, top pressure piece 1 is provided with the limit stop 4 with slope 401, when using, rotating piece 2 is screwed, sliding piece 3 is resisted on the side of slope 401 close to top pressure piece 1, rotating piece 2 and top pressure piece 1 are rotated as a whole, when top pressure piece 1 is resisted on automobile part, continue to screw rotating piece 2, since the resistance of automobile part, rotating piece 2 continues to rotate, top pressure piece 1 does not rotate, sliding piece 3 slides along slope 401 until sliding piece 3 passes through slope 401 and is away from the side of top pressure piece 1, so that operator has a skidding feeling, to judge that top pressure piece 1 has been resisted on automobile part, and when continue to screw rotating piece 2, since the block of automobile part, top pressure piece 1 will not rotate with rotating piece 2 again, to prevent automobile part from being pressed and deformed.

[0031] The outer surface of the part of top pressure piece 1 located outside accommodating groove 201 is provided with thread in the embodiment, and top pressure piece 1 is connected with positioning equipment through thread, so that the rotation of top pressure piece 1 can realize the movement of top pressure device.

[0032] In addition, the maximum moving distance of the rotating member 2 relative to the pressing member 1 is equal to the maximum thickness of the limiting block 4, and the length of the sliding member 3 is equal to the difference between the depth of the accommodating groove 201 and the maximum depth of the pressing member 1 inserted into the rotating member 2, so that excessive idling can be prevented, the efficiency is improved, the operation feeling is improved, and the user experience is improved.

[0033] Further, the pressing device further comprises a reset spring 5, the reset spring 5 is located in the accommodating groove 201, and the reset spring 5 is located between the bottom of the accommodating groove 201 and the pressing member 1, and the two ends of the reset spring 5 are connected with the bottom of the accommodating groove 201 and the pressing member 1 respectively. The reset spring 5 pulls the rotating member 2 close to the pressing member 1, so that the sliding member 3 is always pressed against the end surface of the pressing member 1 or the slope 401 of the limiting block 4. When the pressing member 1 is pressed against the automobile part, the pressing member 1 is blocked, and the rotating member 2 is rotated and the pressing member 1 is not rotated, the sliding member 3 slides along the slope 401 and drives the rotating member 2 away from the pressing member 1, and the reset spring 5 is stretched. When the sliding member 3 passes the farthest point of the slope 401 from the pressing member 1, the reset spring 5 restores and pulls the rotating member 2 close to the pressing member 1, and the sliding member 3 can be pressed against the pressing member 1 again.

[0034] In the embodiment, the pressing device further comprises a rotating shaft 6, the pressing member 1 is provided with a mounting hole 101, the rotating shaft 6 is located in the accommodating groove 201, one end of the rotating shaft 6 is connected with the bottom of the accommodating groove 201, and the other end of the rotating shaft 6 is inserted into the mounting hole 101. The reset spring 5 of the embodiment is sleeved outside the rotating shaft 6. The rotating shaft 6 of the embodiment adopts a bolt, the rotating member 2 is provided with a through hole 202, the inner wall of the mounting hole 101 is provided with a threaded structure, the rotating shaft 6 passes through the through hole 202 and the accommodating groove 201 and extends into the mounting hole 101, the rotating shaft 6 is screwed with the mounting hole 101, and the head of the bolt of the rotating shaft 6 is located outside the rotating member 2. By adopting the bolt structure of the rotating shaft 6, the rotating member 2 is rotatably connected with the pressing member 1, the rotating member 2 can be separated from the pressing member 1, and the rotating member 2 rotates around the rotating shaft 6.

[0035] Optionally, the sliding member 3 is provided as two or more, the two or more sliding members 3 are evenly arranged in a circumferential direction with the rotating shaft 6 of the rotating member 2 as the center, the limiting block 4 is provided as two or more, the number of the limiting block 4 is equal to the number of the sliding member 3, and the two or more limiting blocks 4 are evenly arranged in a circumferential direction with the rotating shaft 6 of the rotating member 2 as the center. The arrangement of the two or more evenly distributed sliding members 3 and limiting blocks 4 is helpful to the movement balance of the rotating member 2.

[0036] In addition, the end of the sliding member 3 close to the pressing member 1 is arc-shaped, which helps to reduce the friction when the sliding member 3 slides. Further, the end of the sliding member 3 close to the pressing member 1 is spherical. Still further, the end of the sliding member 3 close to the pressing member 1 is provided with a rolling ball 301. The sliding member 3 of the present embodiment is a ball plunger.

[0037] Embodiment Two

[0038] The difference between the present embodiment and Embodiment One is that the pressing member 1 is further described in the present embodiment based on Embodiment One.

[0039] The pressing member 1 of the present embodiment comprises a limiting seat 102, a connecting rod 103 and a pressing head 104, the limiting seat 102 and the pressing head 104 are connected to the two ends of the connecting rod 103 respectively, the limiting seat 102 is used to be inserted into the accommodating groove 201, and the limiting block 4 is arranged on the end face of the limiting seat 102 away from the connecting rod 103. The outer wall of the connecting rod 103 is provided with a threaded structure. In addition, the end of the pressing head 104 away from the connecting rod 103 is spherical.

[0040] In addition, the outer side of the part of the pressing member 1 inserted into the accommodating groove 201 is surrounded by two opposite rectangular faces and two opposite circular arc faces. The limiting seat 102 of the present embodiment is inserted into the accommodating groove 201, so the outer side of the limiting seat 102 is surrounded by two opposite rectangular faces and two opposite circular arc faces, which can make a gap between the rotating member 2 and the limiting seat 102, reduce the friction, and prevent the rotating member 2 from driving the pressing member 1 to rotate when the sliding member 3 slides along the slope 401.

[0041] In addition, the limiting block 4 of the present embodiment further comprises a limiting outer side 402, a limiting inner side 403, a limiting top face 404 and a limiting end face 405, the limiting outer side 402, the limiting inner side 403, the limiting top face 404 and the limiting end face 405 and the slope 401 surround the limiting block 4, the limiting outer side 402 and the limiting inner side 403 are arranged oppositely, the limiting end face 405 is connected with the pressing member 1, the limiting outer side 402, the limiting inner side 403 and the limiting top face 404, the limiting top face 404 is connected with the limiting end face 405, the limiting outer side 402, the limiting inner side 403 and the slope 401, the slope 401 is connected with the limiting top face 404, the limiting outer side 402, the limiting inner side 403 and the pressing member 1, and the limiting top face 404 is perpendicular to the rotating shaft 6 of the rotating member 2. The distance between each point on the limiting top face 404 and the limiting seat 102 is equal to the maximum distance between the slope 401 and the limiting seat 102, so when the sliding member 3 slides to the point farthest from the limiting seat 102 on the slope 401, the sliding member 3 still slides along the limiting top face 404, and there is a clear sense of falling away when the sliding member 3 leaves the limiting top face 404, which improves the operation feeling.

[0042] The other structure of this embodiment is the same as that of embodiment one, and will not be described here.

[0043] Embodiment three

[0044] As shown in Figure 6 and Figure 7 The utility model embodiment provides a positioning equipment, including support 7, movable block 8, zero block 9 and the top pressure device of embodiment one or embodiment two, movable block 8 is movably connected with support 7, zero block 9 is connected on movable block 8, and the top pressure device is installed on support 7, and the top pressure device is located the below of zero block 9, and the part of top pressure piece 1 of the top pressure device outside the accommodation groove 201 is connected with support 7 by screw thread, and the top pressure device is approached or is far from zero block 9 by rotating rotating piece 2.In use, since rotating piece 2 is connected with support 7 by screw thread, therefore by rotating rotating piece 2, can make the whole top pressure device move.In application, the positioning equipment is installed in the side of automobile parts, by the movement of movable block 8, make zero block 9 move to the top of automobile parts, the bottom surface of zero block 9 is pasted with the upside of automobile parts, then twist rotating piece 2, drive the whole top pressure device and move upwards until the pressure head 104 is resisted on the downside of automobile parts, when the pressure head 104 contacts automobile parts, continue to twist rotating piece 2, since the block of automobile parts, rotating piece 2 rotates and top pressure piece 1 does not rotate, sliding piece 3 slides along the slope 401, rotating piece 2 is far from top pressure piece 1, reset spring 5 is stretched, until sliding piece 3 crosses the farthest point of limit seat 102 from limit stopper 4, reset spring 5 restores, pull rotating piece 2 close to top pressure piece 1, therefore, when the pressure head 104 is resisted on automobile parts, continue to rotate rotating piece 2, also will not drive the pressure head 104 and top to automobile parts, can prevent the automobile parts from being pressed and broken.

[0045] Specifically, support 7 includes support seat 701, first mounting block 702 and second mounting block 703, first mounting block 702 is arranged above support seat 701, second mounting block 703 is connected to the side of support seat 701, movable block 8 is movably connected to first mounting block 702, the moving direction of movable block 8 is arranged at an obtuse angle with the height direction of support seat 701, top pressure piece 1 is connected with second mounting block 703 by screw thread, and the moving direction of top pressure device is arranged at an acute angle with the height direction of support seat 701. In this embodiment, the moving direction of movable block 8 is arranged at an obtuse angle with the height direction of support seat 701, so that movable block 8 can move upwardly and obliquely away from support seat 701; and the moving direction of top pressure device is arranged at an acute angle with the height direction of support seat 701, so that top pressure device can move upwardly and obliquely towards support seat 701. Therefore, the movement of movable block 8 and top pressure device can be decomposed into vertical and horizontal movements, but movable block 8 moves obliquely away from support seat 701, and top pressure device moves obliquely towards support seat 701. Thus, zero block 9 of the positioning equipment of this embodiment can be pasted on automobile parts at different heights.

[0046] Specifically, the positioning device of the embodiment further comprises a locking bolt 10, the top surface of the first mounting block 702 is inclined, and the inclined surface of the first mounting block 702 is inclined away from the support 701 from the side far away from the second mounting block 703 to the side close to the second mounting block 703. A sliding groove is arranged on the top surface of the first mounting block 702, the sliding groove is a through groove, and the movable block 8 is slidably inserted into the sliding groove. The movable block 8 is provided with a first locking hole 801, the first locking hole 801 is a long hole extending along the length direction of the movable block 8, the groove bottom of the sliding groove is provided with a second locking hole, the locking bolt 10 passes through the first locking hole 801 and is threadedly connected with the second locking hole. When the movable block 8 is moved to the position, the locking bolt 10 is tightened, and the movable block 8 is fixed on the first mounting block 702.

[0047] In addition, the second mounting block 703 of the embodiment comprises a first connecting portion 7031 and a second connecting portion 7032 connected with each other, the first connecting portion 7031 is connected with the side surface of the support 701, the second connecting portion 7032 is provided with a driving hole penetrating therethrough, the connecting rod 103 of the pressing device passes through the driving hole, and the connecting rod 103 is threadedly connected with the driving hole. The second connecting portion 7032 is arranged at an obtuse angle with the first connecting portion 7031, so that the second connecting portion 7032 is arranged to be inclined upward, and the inclined direction of the second connecting portion 7032 is parallel to the top surface of the first mounting block 702.

[0048] The working process of the utility model is: fixing the support 701 beside the automobile parts, screwing the locking bolt 10, loosening the movable block 8, then moving the movable block 8, the movable block 8 slides along the sliding groove, the one end of the movable block 8 connects the zero block 9 and is pasted on the upside of the automobile parts, then screwing the locking bolt 10, fixing the movable block 8. Then, screwing the rotating part 2, the rotating part 2 and the top pressure piece 1 rotate together, namely the connecting rod 103 rotates, the connecting rod 103 is screw thread connection with the driving hole, the connecting rod 103 rotates and makes the whole top pressure device move upwards until the pressure head 104 is against the downside of the automobile parts. Continue to screw the rotating part 2, the rotating part 2 rotates, because of the block of the automobile parts, the top pressure piece 1 does not move, the sliding piece 3 slides along the slope 401 of the limiting block 4, making the rotating part 2 rotate and move away from the top pressure piece 1, the reset spring 5 stretches, until the sliding piece 3 passes the farthest point of the limiting block 4 from the limiting seat 102, the reset spring 5 restores, driving the rotating part 2 to move close to the top pressure piece 1, the operator has the feeling of popping out, namely the pressure head 104 has been in place. And continue to screw the rotating part 2, still from the sliding piece 3 sliding, the reset spring 5 stretching and restoring process, and the top pressure device will not continue to move close to the automobile parts, so as to prevent the automobile parts from being damaged. After the detection is completed, loosen the locking bolt 10, move the movable block 8 to move the zero block 9 connected thereto away from the automobile parts, then screw the rotating part 2 in the opposite direction, the sliding piece 3 will be against the limiting end face 405 of the limiting block 4, making the rotating part 2, the top pressure piece 1 and the whole top pressure device rotate in the opposite direction, so as to make the pressure head 104 move downwards to move away from the automobile parts.

[0049] In conclusion, the utility model embodiment provides a kind of top pressure device, it is movable by rotating and being connected with the top pressure piece 1 and the rotating part 2, and sliding piece 3 is equipped in rotating part 2, and the limiting block 4 with slope 401 is arranged in top pressure piece 1, when using, rotating part 2 is screwed, sliding piece 3 is against the side of slope 401 close to top pressure piece 1, rotating part 2 and top pressure piece 1 rotate together as a whole, when top pressure piece 1 is against automobile parts, continue to screw rotating part 2, because of the resistance of automobile parts, rotating part 2 continues to rotate, top pressure piece 1 does not rotate, sliding piece 3 slides along slope 401 until sliding piece 3 passes the side of slope 401 far from top pressure piece 1, so that operator has the feeling of skidding, to determine that top pressure piece 1 has been against automobile parts, and when continue to screw rotating part 2, because of the block of automobile parts, top pressure piece 1 will not rotate with rotating part 2, to prevent automobile parts from being deformed by pressing.

[0050] The above only is the preferred implementation of the utility model, it should be pointed out, for ordinary technical personnel in the prior art, without departing from the technical principle of the utility model, can make a number of improvements and substitutions under the premise, these improvements and substitutions also should be regarded as the protection range of the utility model.

Claims

1. A top pressing apparatus characterized by comprising: The utility model provides a top pressure piece (1), rotating piece (2) and sliding piece (3), rotating piece (2) is equipped with accommodating groove (201), make rotating piece (2) for one end open sleeve structure, one end of top pressure piece (1) inserts accommodating groove (201), rotating piece (2) is connected with top pressure piece (1) rotation, and rotating piece (2) can be along the direction of approaching or away from top pressure piece (1) moves, sliding piece (3) is located in accommodating groove (201), and one end of sliding piece (3) is connected with the groove bottom of accommodating groove (201), and sliding piece (3) is located between the groove bottom of accommodating groove (201) and top pressure piece (1), and sliding piece (3) deviates the setting of rotating shaft (6) of rotating piece (2), and one end of top pressure piece (1) inserted in accommodating groove (201) is equipped with limit stopper (4), and one side of limit stopper (4) is equipped with slope (401), and slope (401) is inclined from the side of limit stopper (4) and top pressure piece (1) is connected to the direction of away from top pressure piece (1), and slope (401) is located on the movement track of sliding piece (3).

2. The top pressing apparatus according to claim 1, wherein The maximum moving distance of rotating piece (2) relative to top pressure piece (1) is equal to the maximum thickness of limit stopper (4), and the length of sliding piece (3) is equal to the difference between the depth of accommodating groove (201) and the maximum depth of top pressure piece (1) inserted into rotating piece (2).

3. The top pressing apparatus according to claim 1, wherein Reset spring (5) is further included, and reset spring (5) is located in accommodating groove (201), and reset spring (5) is located between the groove bottom of accommodating groove (201) and top pressure piece (1), and the two ends of reset spring (5) are connected with the groove bottom of accommodating groove (201) and top pressure piece (1) respectively.

4. The top pressing apparatus according to claim 1, wherein The shaft (6) is further included, the top pressure piece (1) is provided with a mounting hole (101), the shaft (6) is located in the accommodating groove (201), one end of the shaft (6) is connected with the groove bottom of the accommodating groove (201), the other end of the shaft (6) is inserted into the mounting hole (101).

5. The top pressing apparatus according to claim 1, wherein The end of the sliding piece (3) close to the top pressure piece (1) is arc surface structure.

6. The top pressing apparatus according to claim 1, wherein The top pressure piece (1) includes a limiting seat (102), a connecting rod (103) and a pressure head (104), the limiting seat (102) and the pressure head (104) are connected at both ends of the connecting rod (103) respectively, the limiting seat (102) is used for inserting into the accommodating groove (201), and the limit stopper (4) is arranged on the end face of the limiting seat (102) away from the connecting rod (103).

7. The top pressing apparatus according to claim 1, wherein The outer side of the part of the top pressure piece (1) inserted into the accommodating groove (201) is surrounded by two opposite rectangular surfaces and two opposite circular arc surfaces.

8. The top pressing apparatus according to claim 1, wherein The limiting block (4) further comprises a limiting outer side (402), a limiting inner side (403), a limiting top surface (404) and a limiting end surface (405), the limiting outer side (402), the limiting inner side (403), the limiting top surface (404), the limiting end surface (405) and the slope (401) form the limiting block (4), the limiting outer side (402) and the limiting inner side (403) are oppositely arranged, the limiting end surface (405) is connected with the top pressing piece (1), the limiting outer side (402), the limiting inner side (403) and the limiting top surface (404), the limiting top surface (404) is connected with the limiting end surface (405), the limiting outer side (402), the limiting inner side (403) and the slope (401), the slope (401) is connected with the limiting top surface (404), the limiting outer side (402), the limiting inner side (403) and the top pressing piece (1), and the limiting top surface (404) is vertically connected with the rotating shaft (6) of the rotating piece (2).

9. A positioning device, characterized by The device comprises a support (7), a movable block (8), a zero sticking block (9) and the top pressing device of any one of claims 1-8, the movable block (8) is movably connected with the support (7), the zero sticking block (9) is connected on the movable block (8), the top pressing device is installed on the support (7), and the top pressing device is located below the zero sticking block (9), and the top pressing piece (1) of the top pressing device is threadedly connected with the support (7) at a portion outside the accommodating groove (201), and the top pressing device is made close to or away from the zero sticking block (9) by rotating the rotating piece (2).

10. The positioning apparatus according to claim 9, characterized in that, The support (7) comprises a support base (701), a first mounting block (702) and a second mounting block (703), the first mounting block (702) is arranged above the support base (701), the second mounting block (703) is connected on the side of the support base (701), the movable block (8) is movably connected on the first mounting block (702), the moving direction of the movable block (8) is arranged at an obtuse angle with the height direction of the support base (701), the top pressing piece (1) is threadedly connected with the second mounting block (703), and the moving direction of the top pressing device is arranged at an acute angle with the height direction of the support base (701).

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