Enhanced zero-point quick-change device

Abstract

The utility model discloses an enhanced zero-point quick-change device. A shell of the quick-change device is composed of an upper shell body, a locking seat, a barrel body and a rear cover. The interior of the quick-change device is divided into an upper chamber and a lower chamber by the locking seat; a blind rivet locking cavity used for locking a blind rivet is formed in the center of the upper shell, a plurality of locking pin holes are formed in the side wall of the upper shell in a surrounding mode, movable locking pins are arranged in the locking pin holes, a first piston is arranged in the upper cavity, and a first spring is arranged between the first piston and the locking base; a second piston is arranged in the lower cavity, and a second spring is arranged between the second piston and the rear cover. A steel ball is arranged on the side wall of the locking seat, and a plurality of air inlet holes are formed in the shell and communicated with the upper cavity and the lower cavity respectively. According to the enhanced zero-point quick-change device, the blind rivet is locked through the two sets of power devices, and the locking stability of the blind rivet is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the field of clamping fixtures, and in particular relates to an enhanced zero-point quick-change device. Background Art

[0002] With the development of industrialization, the degree of automation in the production process is getting higher and higher, and the positioning accuracy and clamping efficiency of the workpiece in the processing process are required to be higher and higher, and the zero-point quick-change device came into being. Because some production requires a greater pull-down force to maintain its stability during the production process, the traditional zero-point quick-change device cannot meet the production requirements due to insufficient pull-down force. Utility Model Content

[0003] The purpose of the utility model is to provide an enhanced zero-point quick-change device, which realizes the locking of the pull nail through two sets of power devices, greatly improving the stability of the locking of the pull nail, and the two sets of power devices assist each other, and also improve their respective service life.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is to design an enhanced zero-point quick-change device, the shell of the quick-change device is composed of an upper shell, a locking seat, a cylinder and a rear cover; the locking seat is located between the upper shell and the cylinder, and the rear cover covers the rear end of the cylinder; the locking seat separates the interior of the quick-change device into an upper chamber and a lower chamber; a rivet locking chamber for locking the rivet is provided in the center of the upper shell, a plurality of locking pin holes are arranged around the side wall of the upper shell, and the locking pin holes are connected with the rivet locking chamber, a movable locking pin is arranged in the locking pin hole, a card slot is arranged on the outer wall of the rivet, and the front end of the locking pin is a card connection end for locking the card slot; a first piston is arranged in the upper chamber, a plurality of first springs are arranged between the first piston and the locking seat, and a spring capable of driving the lock is arranged between the upper part of the first piston and the locking pin A limiting structure for the bidirectional movement of the tightening pin along the locking pin hole; a first piston moving chamber for the up and down movement of the lower part of the first piston is provided on the locking seat; a second piston is provided in the lower chamber, and a plurality of second springs are provided between the second piston and the back cover; a plurality of through holes are provided on the side wall of the locking seat, and steel balls are provided in the through holes, and the steel balls contact the outer wall of the lower part of the first piston and the inner side of the side wall of the second piston at the same time, and the contact surface of the outer wall of the lower part of the first piston contacting the steel balls and the contact surface of the inner side wall of the second piston are both non-vertical surfaces (i.e. inclined surfaces or curved surfaces, etc.) that can ensure the vertical movement of the first piston and the second piston when the steel balls transmit stress; a plurality of air inlet holes are provided on the shell, and the air inlet holes are respectively connected to the upper chamber and the lower chamber, and the connecting position is located at the upper part of the first piston and the upper part of the second piston.

[0005] Furthermore, an annular groove is provided on the lower surface of the upper shell body, and the annular groove is connected to the locking pin hole; the upper part of the first piston is annular, and the annular structure of the upper part of the first piston is provided with a plurality of notches for embedding the locking pin, and an oblique groove is provided on the side wall of the locking pin, and an oblique key is provided on the notch of the first piston, and the oblique keys are respectively embedded in the oblique grooves of the side wall of the locking pin; the upper annular structure of the first piston can move up and down in the annular groove; the upper chamber is connected to the annular groove.

[0006] Furthermore, the upper shell, the locking seat, the cylinder and the rear cover are connected by mounting screws.

[0007] Furthermore, a limiter is provided on the lower outer wall of the locking seat at a position above the contact surface between the steel ball and the second piston.

[0008] Furthermore, a first piston upper cavity is provided in the center of the upper surface of the first piston, and the lower outer wall of the rivet locking cavity of the upper shell extends downward into the first piston upper cavity. This structure acts as a limit to ensure the directional movement of the first piston in the vertical direction.

[0009] Furthermore, the air inlet hole is arranged on the upper shell body, and a passage connecting the air inlet hole is arranged on the cylinder body and the locking seat, so that the air inlet hole can connect the upper chamber and the lower chamber at the same time.

[0010] The advantages and beneficial effects of the utility model are:

[0011] 1) Two sets of power devices are designed, which are composed of a first piston and a first spring, and a second piston and a second spring, and the stress is transmitted by the steel ball on the locking seat to ensure the stability of the locking of the rivet.

[0012] 2) The two power units provide auxiliary stress to each other, which also reduces the stress damage to a single power unit and greatly improves the overall service life.

[0013] 3) The structures of the components in the zero-point quick-change device are reasonably arranged, and a limited position structure is designed between the locking seat and the first piston and the second piston to ensure that the piston can move in a directional manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is an exploded view of the utility model.

[0016] Figure 3 This is a first cross-sectional schematic diagram of the utility model.

[0017] Figure 4 This is a second cross-sectional schematic diagram of the utility model.

[0018] Among them, the upper shell 1, the air inlet hole 1-1, the locking pin hole 1-2, the rivet locking cavity 1-3, the ring groove 1-4, the locking pin 2, the first piston 3, the first spring 4, the locking seat 5, the steel ball 6, the second piston 7, the second spring 8, the cylinder 9, the back cover 10, the mounting screw 11, the rivet 12, the upper chamber a, the lower chamber b, the first piston moving chamber c, and the first piston upper chamber d. DETAILED DESCRIPTION

[0019] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0020] Example:

[0021] like Figure 1 to Figure 4 As shown, the enhanced zero-point quick-change device includes an upper shell 1, a locking pin 2, a first piston 3, a first spring 4, a locking seat 5, a steel ball 6, a second piston 7, a second spring 8, a cylinder 9, a rear cover 10, a mounting screw 11, and a pull nail 12.

[0022] A slot is provided on the outer wall of the rivet 12, and the front end of the locking pin 2 is a clamping end for locking the slot.

[0023] The upper shell 1 is a disc structure; three locking pin holes 1-2 are arranged on the upper side wall of the upper shell 1, and the hole axes of the three locking pin holes 1-2 all pass through the central axis of the upper shell 1, and the hole axis angle between two adjacent locking pin holes 1-2 is 120°; a rivet locking cavity 1-3 for locking the rivet 12 is arranged at the central position of the upper shell 1, and the lower outer wall of the rivet locking cavity 1-3 extends downward and protrudes from the lower surface of the upper shell 1; the rivet locking cavity 1-3 is vertically connected with the three locking pin holes 1-2 respectively; there are three locking pins 2, which move in the three locking pin holes 1-2 respectively; an annular groove 1-4 is arranged on the lower surface of the upper shell 1, and the annular groove 1-4 is connected with the locking pin hole 1-2;

[0024] The locking seat 5 is composed of an upper disk surface and a columnar structure located below the disk surface, and a first piston movement chamber c is provided in the columnar structure;

[0025] The lower outer wall of the upper shell 1, the disk surface of the locking seat 5, the cylinder 9 and the rear cover 10 are assembled by installing screws 11; the disk surface of the locking seat 5 separates the interior of the quick-change device into an upper chamber a and a lower chamber b; the upper chamber a is connected to the annular groove 1-4 on the lower surface of the upper shell 1;

[0026] The upper part of the first piston 3 is an annular structure, and the annular structure of the upper part of the first piston 3 is provided with three notches for embedding the locking pin 2, and the side walls of the three locking pins 2 are provided with oblique grooves, and the three notches of the first piston 3 are provided with oblique keys, and the oblique keys are respectively embedded in the oblique grooves of the side walls of the locking pin 2; the upper annular structure of the first piston 3 can move up and down in the annular grooves 1-4 and the upper chamber a;

[0027] A first piston upper chamber d is provided at the center of the upper surface of the first piston 3, and the lower outer wall of the rivet locking chamber 1-3 of the upper shell 1 extends downward into the first piston upper chamber d, and ensures that when the upper annular structure of the first piston 3 moves upward to the top of the annular groove 1-4, the lower outer wall of the rivet locking chamber 1-3 extending downward still does not contact or just contacts the bottom of the first piston upper chamber d;

[0028] The central area of ​​the lower part of the first piston 3 is a columnar structure, and a plurality of first springs 4 are arranged around the columnar structure of the lower part of the first piston 3 between the outer edge area of ​​the lower part of the first piston 3 and the disk surface of the locking seat 5; the columnar structure of the lower part of the first piston 3 moves in the first piston moving chamber c of the locking seat 5;

[0029] A plurality of second springs 8 are arranged between the second piston 7 and the back cover 10; the second piston 7 moves up and down in the lower chamber b; a plurality of through holes are arranged in a ring shape on the lower outer wall of the locking seat 5, and steel balls 6 are embedded in the through holes; the outer edge of the lower end of the columnar structure at the bottom of the first piston 3 is an arc surface, and a raised arc surface is arranged on the inner side of the side wall of the second piston 7; the surface of the steel ball 6 contacts the arc surface at the lower end of the columnar structure at the bottom of the first piston 3 and the raised arc surface on the inner side of the side wall of the second piston 7 at the same time; on the outer wall of the columnar structure at the bottom of the locking seat 5, a stepped limit is formed at a position above the raised arc surface on the inner wall of the second piston 7.

[0030] A plurality of air inlet holes 1-1 are provided on the upper shell body 1, and the air inlet holes 1-1 are respectively connected to the annular groove 1-4 and the lower chamber b (channels connecting the air inlet holes are provided on the cylinder body 9 and the locking seat 5 to ensure that the air inlet holes 1-1 are connected to the lower chamber b), and the connecting positions are respectively above the upper annular structure of the first piston 3 and above the upper edge of the side wall of the second piston 7.

[0031] The process of locking the pull stud 12 is as follows:

[0032] In the case of no ventilation and the rivet 12 extending into the rivet locking chamber 1-3, the first spring 4 directly acts on the first piston 3, so that the first piston 3 is lifted up. At the same time, the second piston 7 is lifted up by the second spring 8. Since the steel ball 6 is in contact with the first piston 3 and the second piston 7 at the same time, the steel ball 6 transmits the upward force of the second spring 8 to the first piston 3, thereby assisting the first piston 3 to be lifted up. At this time, the upper annular structure of the first piston 3 extends into the top of the annular groove 1-4, and the clamping end of the locking pin 2 extends out of the clamping groove of the rivet 12, thus achieving the locking of the rivet 12.

[0033] The process of unlocking the pull stud 12 is as follows:

[0034] Air is taken in through the air inlet 1-1, and the first piston 3 and the second piston 7 move downward under the action of air pressure, at which time the first spring 4 and the second spring 8 are compressed. In this process, the first piston 3 moves downward, and the first piston 3 applies downward stress to the steel ball 6, and the steel ball 6 applies downward stress to the second piston 7, assisting the second piston 7 to move downward. According to the reaction of the force, the first piston 3 is also subjected to the upward force generated by the steel ball 6, which slows down the downward speed of the first piston 3 to a certain extent, and plays a certain protective role for the first piston 3. Due to the downward movement of the first piston 3, the oblique key at the notch of the annular structure on the upper part of the first piston 3 drives the locking pin 2 to move outward, and finally the clamping end of the locking pin 2 is separated from the clamping groove of the rivet 12, that is, the rivet 12 is unlocked.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An enhanced zero-point quick-change device, characterized in that: The shell of the quick-change device is composed of an upper shell, a locking seat, a cylinder and a rear cover; the locking seat is located between the upper shell and the cylinder, and the rear cover covers the rear end of the cylinder; the locking seat divides the interior of the quick-change device into an upper chamber and a lower chamber; a rivet locking chamber for locking the rivet is provided in the center of the upper shell, a plurality of locking pin holes are arranged around the side wall of the upper shell, and the locking pin holes are connected with the rivet locking chamber, a movable locking pin is provided in the locking pin hole, a slot is provided on the outer wall of the rivet, and the front end of the locking pin is a clamping end for locking the slot; a first piston is provided in the upper chamber, a plurality of first springs are provided between the first piston and the locking seat, and a spring capable of driving the locking pin to move bidirectionally along the locking pin hole is provided between the upper part of the first piston and the locking pin a limiting structure; the locking seat is provided with a first piston moving chamber for the lower part of the first piston to move up and down; the lower chamber is provided with a second piston, and a plurality of second springs are provided between the second piston and the back cover; the side wall of the locking seat is provided with a plurality of through holes, and steel balls are provided in the through holes, and the steel balls contact the outer wall of the lower part of the first piston and the inner side of the side wall of the second piston at the same time, and the contact surface of the outer wall of the lower part of the first piston in contact with the steel balls and the contact surface of the inner side wall of the second piston are both non-vertical surfaces that can ensure that the first piston and the second piston move in the vertical direction when the steel balls transmit stress; the shell is provided with a plurality of air inlet holes, which are respectively connected to the upper chamber and the lower chamber, and the connecting position is located at the upper part of the first piston and the upper part of the second piston.

2. The enhanced zero-point quick-change device according to claim 1, characterized in that: The lower surface of the upper shell body is provided with an annular groove, which is connected to the locking pin hole; the upper part of the first piston is annular, and the annular structure of the upper part of the first piston is provided with a plurality of notches for embedding the locking pin, and the side wall of the locking pin is provided with an oblique groove, and the notch of the first piston is provided with an oblique key, and the oblique keys are respectively embedded in the oblique grooves of the side wall of the locking pin; the upper annular structure of the first piston can move up and down in the annular groove; the upper chamber is connected with the annular groove.

3. The enhanced zero-point quick-change device according to claim 1, characterized in that: The upper shell, the locking seat, the cylinder and the rear cover are connected by mounting screws.

4. The enhanced zero-point quick-change device according to claim 1, characterized in that: The lower outer wall of the locking seat is provided with a limiter at a position above the contact surface between the steel ball and the second piston.

5. The enhanced zero-point quick-change device according to claim 1, characterized in that: A first piston upper cavity is arranged at the center of the upper surface of the first piston, and a lower outer wall of the rivet locking cavity of the upper shell extends downwardly into the first piston upper cavity.

6. The enhanced zero-point quick-change device according to claim 1, characterized in that: The air inlet hole is arranged on the upper shell body, and a passage communicating with the air inlet hole is arranged on the cylinder body and the locking seat, so that the air inlet hole can communicate with the upper chamber and the lower chamber at the same time.

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