Self-locking device

Abstract

The utility model discloses a self-locking device which comprises a middle seat, an expansion sleeve, a pop-rivet assembly and a tensioning assembly, the middle seat is arranged between the expansion sleeve and the tensioning assembly, the pop-rivet assembly comprises a pop-rivet, a sliding piece and a plurality of steel balls, the sliding piece is arranged below the middle seat and is in sliding fit with the tensioning assembly, and the steel balls are arranged in the middle seat. The steel ball is arranged on the sliding piece and abuts against the tensioning assembly. The blind rivet penetrates through the sliding piece and the middle seat and is matched with the expansion sleeve; the tensioning assembly is used for extruding the steel balls to fold to drive the sliding piece to move downwards and drive the blind rivet to move downwards to lock the expansion sleeve; the tensioning assembly and the blind rivet assembly are arranged below the middle base, a blind rivet in the blind rivet assembly is matched with the expansion sleeve, the upward elastic extrusion force of the tensioning assembly drives the steel balls to gather together and move downwards, and the sliding piece is driven to move downwards so that the blind rivet can tension and lock the expansion sleeve. When the space between the middle seat and the tensioning assembly is inflated, air pressure drives the tensioning assembly to move downwards so that the steel balls can be dispersed, and the blind rivet resets so that the expansion sleeve can be unlocked. The structure principle is simple, and production and manufacturing are convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to workpiece locking positioning technical field, concretely relates to a self locking device. BACKGROUND

[0002] In machining, the zero point positioning self locking device can lock and position the workpiece, facilitating the movement of the workpiece and subsequent machining. The existing self locking devices are hydraulic, pneumatic and mechanical spring types. The hydraulic self locking device needs strong sealing to prevent hydraulic oil leakage, so the production and procurement costs are relatively high. The pneumatic and mechanical spring type self locking devices have relatively low machining costs, but the existing pneumatic or mechanical spring type self locking devices have relatively complex structures and many parts, resulting in relatively high production costs. INVENTION CONTENTS

[0003] The utility model discloses a self locking device, through setting up the tensioning assembly and the pull -in assembly below the intermediate seat, make the pull -in of pull -in assembly and the expansion sleeve cooperate, through the elastic extrusion force of tensioning assembly upward drive the steel ball of pull -in assembly gather and move down, drive the slider of pull -in assembly move down and make pull -in the expansion sleeve lock and be locked down tightly, when the inflation between intermediate seat and tensioning assembly, the steel ball is dispersed by the air pressure drive tensioning assembly move down, and pull -in resets, thereby making the expansion sleeve unlock.

[0004] The utility model discloses a self locking device, through setting up the tensioning assembly and the pull -in assembly below the intermediate seat, make the pull -in of pull -in assembly and the expansion sleeve cooperate, through the elastic extrusion force of tensioning assembly upward drive the steel ball of pull -in assembly gather and move down, drive the slider of pull -in assembly move down and make pull -in the expansion sleeve lock and be locked down tightly, when the inflation between intermediate seat and tensioning assembly, the steel ball is dispersed by the air pressure drive tensioning assembly move down, and pull -in resets, thereby making the expansion sleeve unlock.

[0005] A self locking device, comprising an intermediate seat, an expansion sleeve, a pull-in assembly and a tensioning assembly, the intermediate seat is arranged between the expansion sleeve and the tensioning assembly, the pull-in assembly comprises a pull-in, a slider and a plurality of steel balls, the slider is arranged below the intermediate seat and is in sliding cooperation with the tensioning assembly, and the steel balls are arranged on the slider and abut against the tensioning assembly.

[0006] Further, the tensioning assembly comprises an extrusion seat, an extrusion plate and a plurality of extrusion springs, the extrusion seat is connected with the intermediate seat in plug-in connection and sliding cooperation, the extrusion springs are arranged between the extrusion plate and the extrusion seat, and the steel balls are arranged in the extrusion seat.

[0007] Further, a plurality of pins are arranged on the extrusion plate, and the pins are used for limiting the extrusion springs.

[0008] Further, a reset spring is arranged between the slider and the extrusion plate, and the reset spring is used for supporting the slider to reset the slider.

[0009] Further, the extrusion plate is provided with a convex shaft, the sliding part is provided with a groove, one end of the reset spring is sleeved on the convex shaft, and the other end is inserted into the groove of the sliding part.

[0010] Further, the extrusion seat comprises an extrusion part and a connecting part, the extrusion part is connected with the connecting part, the extrusion part is located in the middle seat, the extrusion part is provided with an abutting surface, the abutting surface is a slope structure, and the abutting surface is used for extruding the steel ball; the connecting part is located outside the extrusion part and is used for being connected with an external supporting plate; a movement gap is arranged between the extrusion part and the middle seat, and the extrusion seat moves downward of the middle seat and is used for gathering the steel ball.

[0011] Further, the connecting part and the middle seat are provided with an air channel gap, and the air channel gap is used for air inlet to drive the extrusion seat to move downward.

[0012] Further, the extrusion seat and the middle seat are provided with sealing rings.

[0013] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0014] In the utility model, the tensioning assembly and the pull-in assembly are arranged below the middle seat, the pull-in assembly in the pull-in assembly cooperates with the expansion sleeve, the elastic extrusion force of the tensioning assembly upward drives the steel ball of the pull-in assembly to gather and move downward, the sliding part of the pull-in assembly moves downward to make the pull-in assembly lock the expansion sleeve by being pulled in tightly, when the middle seat and the tensioning assembly are inflated, the air pressure drives the tensioning assembly to move downward to make the steel ball disperse, the pull-in assembly resets to make the expansion sleeve unlock, and the structure principle is simple and convenient for production and manufacture. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings in the embodiment will be briefly introduced below, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope, and the related drawings can also be obtained according to the drawings for the ordinary skilled in the art without the creative labor.

[0016] Figure 1 It is the overall structure schematic view of the self-locking device of the utility model.

[0017] Figure 2 It is the overhead structure schematic view of the self-locking device of the utility model.

[0018] Figure 3 It is the cross section structure schematic view of the self-locking device of the utility model.

[0019] Wherein: 1-intermediate seat, 2-inflation set, 3-extrusion seat, 31-connection, 32-extrusion part, 4-sliding piece, 5-pull pin, 6-steel ball, 7-extrusion plate, 71-extrusion spring, 72-convex shaft, 8-reset spring, 9-sealing ring. DETAILED DESCRIPTION

[0020] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments.

[0021] Embodiment 1:

[0022] A self-locking device, as shown in Figure 1 , Figure 2 and Figure 3 , comprising intermediate seat 1, inflation set 2, pull pin 5 assembly and tensioning assembly, intermediate seat 1 is arranged between inflation set 2 and tensioning assembly, intermediate seat 1 is used for fixing inflation set 2, pull pin 5 assembly and tensioning assembly, intermediate seat 1 is connected with external support plate through bolt, tensioning assembly is connected with external support plate through insertion, pull pin 5 assembly comprises pull pin 5, sliding piece 4 and a plurality of steel balls 6, sliding piece 4 is arranged below intermediate seat 1 and is slidably connected with tensioning assembly, steel balls 6 are arranged on sliding piece 4 and abut against tensioning assembly, pull pin 5 passes through sliding piece 4 and intermediate seat 1 and is matched with inflation set 2, tensioning assembly extrudes steel balls 6 upwards to make steel balls 6 gather and push sliding piece 4 downwards, so that sliding piece 4 drives pull pin 5 to move downwards, and pull pin 5 tightens inflation set 2, the elastic gap on inflation set 2 is closed, and external workpiece can be locked; tensioning assembly comprises extrusion seat 3, extrusion plate 7 and a plurality of extrusion springs 71, extrusion seat 3 is connected with intermediate seat 1 through insertion and slidably connected, extrusion springs 71 are arranged between extrusion plate 7 and extrusion seat 3, steel balls 6 are arranged in extrusion seat 3, extrusion plate 7 and extrusion seat 3 are inserted into external support plate, extrusion plate 7 generates pressure on spring, spring pushes extrusion seat 3 to move upwards, so that steel balls 6 gather and push sliding piece 4 to move downwards, thereby inflation set 2 is locked; a plurality of pins are arranged on extrusion plate 7, the pins pass through extrusion plate 7 and are arranged protruding, the pins are used for limiting extrusion springs 71, one end of extrusion spring 71 is sleeved on the pin, and the other end is connected with the bottom of extrusion seat 3; reset spring 8 is arranged between sliding piece 4 and extrusion plate 7, when extrusion seat 3 moves downwards under external force, sliding piece 4 is reset to move upwards under the elasticity of reset spring 8, so that pull pin 5 moves upwards, thereby inflation set 2 is relaxed; convex shaft 72 is arranged on extrusion plate 7, the bottom of sliding piece 4 is provided with a groove, one end of reset spring 8 is sleeved on convex shaft 72, and the other end is inserted into the groove of sliding piece 4, convex shaft 72 and the groove are used for limiting reset spring 8.

[0023] Embodiment 2:

[0024] The embodiment is further limited on the basis of the above-mentioned embodiment, the extrusion seat 3 includes an extrusion part 32 and a connecting part 31, the extrusion part 32 is connected with the connecting part 31, the extrusion part 32 is arranged inside the connecting part 31, the extrusion part 32 is located inside the intermediate seat 1 and is in sliding connection with the intermediate seat 1, the extrusion part 32 is provided with an abutting surface, the abutting surface is a slope structure, and the abutting surface is used for extruding the steel ball 6; the connecting part 31 is located outside the extrusion part 32 and is used for being insertedly connected with an external supporting plate; a movement gap is arranged between the extrusion part 32 and the intermediate seat 1, the extrusion seat 3 is moved below the intermediate seat 1 and is used for gathering the steel ball 6; there is an air channel gap between the connecting part 31 and the intermediate seat 1, the air channel gap is used for air inlet to drive the extrusion seat 3 to move downwards, when it is needed to release the expansion sleeve 2, the gas enters the air channel gap from the external supporting plate, the extrusion part is extruded downwards, the extrusion part is driven to move downwards, so that the steel ball 6 is dispersed, the sliding part 4 is moved upwards under the elastic action of the reset spring 8, the draw bolt 5 is moved upwards, the tension on the expansion sleeve 2 is released, and the elastic gap of the expansion sleeve 2 is restored; the extrusion seat 3 and the intermediate seat 1 are both provided with sealing rings 9, and the sealing rings 9 are used for guaranteeing the air tightness of the extrusion seat 3 and the intermediate seat 1 in the supporting plate. The other parts of the embodiment are the same as those of the above-mentioned embodiment, and details are not repeated here.

[0025] In the description of the utility model, it needs to explain that the adopted terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position relationship based on the position relationship shown in the drawings or the position relationship when the utility model product is usually placed, and only for the convenience of describing the utility model and simplifying the description, and it is not indicated or implied that the indicated device or element must have a specific position, be constructed and operated in a specific position, and therefore it cannot be understood as a limitation on the utility model.

[0026] In addition, in the description of the utility model, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0027] In the description of the utility model, it also needs to explain that, unless otherwise explicitly specified and limited, if the terms "set", "install", "connect", "connect" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A self-locking device, characterized in that, The utility model relates to a locking device for a tire, which comprises a middle seat, an expansion sleeve, a pull pin assembly and a tension assembly, the middle seat is arranged between the expansion sleeve and the tension assembly, the pull pin assembly comprises a pull pin, a slider and a plurality of steel balls, the slider is arranged below the middle seat and is in sliding fit with the tension assembly, the steel balls are arranged on the slider and abut against the tension assembly, the pull pin passes through the slider and the middle seat and is matched with the expansion sleeve, and the tension assembly is used for extruding the steel balls to drive the slider to move downward and drive the pull pin to move downward so as to lock the expansion sleeve.

2. The self-clinching device of claim 1, wherein, The tension assembly comprises an extrusion seat, an extrusion plate and a plurality of extrusion springs, the extrusion seat is connected with the middle seat in plug-in connection and is in sliding fit, the extrusion springs are arranged between the extrusion plate and the extrusion seat, and the steel balls are arranged in the extrusion seat.

3. The self-securing device of claim 2, wherein, A plurality of pins are arranged on the extrusion plate and are used for limiting the extrusion springs.

4. The self-securing device of claim 2, wherein, A reset spring is arranged between the slider and the extrusion plate and is used for supporting the slider to reset the slider.

5. The self-securing device of claim 4, wherein, A convex shaft is arranged on the extrusion plate, a groove is arranged at the bottom of the slider, one end of the reset spring is sleeved on the convex shaft, and the other end is inserted into the groove of the slider.

6. The self-securing device of claim 2, wherein, The extrusion seat comprises an extrusion part and a connecting part, the extrusion part is connected with the connecting part, the extrusion part is located inside the middle seat, the extrusion part is provided with an abutting surface, the abutting surface is a slope structure, and the abutting surface is used for extruding the steel balls; the connecting part is located outside the extrusion part, the connecting part is used for being connected with an external supporting plate, a movement gap is arranged between the extrusion part and the middle seat, the extrusion seat moves below the middle seat to gather the steel balls.

7. The self-securing device of claim 6, wherein, An air passage gap is arranged between the connecting part and the middle seat, air is introduced into the air passage gap to drive the extrusion seat to move downward.

8. The self-securing device of claim 2, wherein, Sealing rings are arranged on the extrusion seat and the middle seat.

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