Inflatable chuck capable of sensing expansion reset signal output

Abstract

The utility model provides an inflatable chuck capable of sensing expansion reset signal output, which comprises a chuck main body, a telescopic column arranged in the chuck main body, a front end cover arranged at the bottom end of the chuck main body in a closed manner, a rear end cover arranged at the top end of the chuck main body in a closed manner, and a wedge block penetrating through the side part of the chuck main body and connected with the side surface of the telescopic column, the front end cover is arranged close to one end of the telescopic column, the other end of the telescopic column is connected with the piston through a first screw, and an expansion piece assembly is arranged at the outer end of the wedge block. An angle sensing mechanism used for sensing the expansion position and the reset moving position is arranged at the bottom of the piston in the inflatable chuck, and the outside of the angle sensing mechanism is in movable contact with an external proximity switch. According to the inflatable chuck capable of inducting expansion reset signal output, whether the inflatable chuck and the expansion piece in the charging barrel expand the inner wall of the charging barrel or not can be judged, and whether the expansion piece resets and is separated from the inner wall of the charging barrel or not after air pressure is stopped or not can be judged.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas expansion chucks, in particular to a gas expansion chuck capable of inductively outputting expansion and resetting signals. Background Art

[0002] The coil is usually wound using an air chuck, which uses compressed air as a power source. After the compressed air is filled into the airbag, the airbag expands to expand the convex key outward, thereby expanding the outer diameter of the air chuck and clamping the coil drum to wind the coil. After the air is deflated, the surface part retracts and the coil is unwound.

[0003] The Chinese utility model patent application number CN2022209067628 discloses a dual-circuit mechanical pneumatic chuck. The dual-circuit mechanical pneumatic chuck provided by the solution can improve the pneumatic chuck torque, far exceeding the capsule pneumatic chuck, while eliminating the role of the spring, and can achieve the effect of changing the clamping action of the inner support barrel with the pneumatic expansion and contraction of the pneumatic pressure, without causing the chuck to reset and get stuck. However, the existing technical solution still has the following two problems:

[0004] (1) The air expansion chuck is inside the barrel. It is unknown whether the expansion piece will expand the inner wall of the barrel after the air pressure is turned on;

[0005] (2) The air expansion chuck is inside the barrel. It is unknown whether the expansion piece will be reset and detached from the inner wall of the barrel after the air pressure is turned off.

[0006] Therefore, based on the above-mentioned prior art, this solution proposes a pneumatic expansion chuck that can sense the output of an expansion reset signal to solve the above-mentioned technical problems. Utility Model Content

[0007] The purpose of the utility model is to provide a pneumatic expansion chuck that can sense the output of expansion and reset signals, which solves the technical problems of how to judge the pneumatic expansion chuck in the barrel, whether the expansion piece has expanded the inner wall of the barrel, and whether the expansion piece has reset and detached from the inner wall of the barrel after the air pressure is turned off, and produces very good technical effects.

[0008] A pneumatic expansion chuck capable of inductively outputting an expansion reset signal, comprising a chuck body, a telescopic column arranged in the chuck body, a front end cover closed at the bottom end of the chuck body, a rear end cover closed at the top end of the chuck body, and a wedge block passing through the side of the chuck body and connected to the side of the telescopic column, wherein the front end cover is arranged near one end of the telescopic column, the other end of the telescopic column is connected to a piston by a screw, the piston is arranged at the lower part of the rear end cover, and an expansion piece assembly is arranged at the outer end of the wedge block, and the expansion piece assembly is detachably connected to the coil;

[0009] The rear end cover is provided with an air flow hole, and the air flow pressure of the air flow hole acts on the upper end surface of the piston; the bottom of the piston in the air expansion chuck is provided with an angle sensing mechanism for sensing the expansion position and the reset movement position, the outside of the angle sensing mechanism is in active contact with the proximity switch of the external device, and the proximity switch is connected to the electric control box through the machine wall panel.

[0010] The angle sensing mechanism comprises a sensing needle connected to the upper outer end of the piston at one end, a sensing conductive rod vertically and movably connected to the other end of the sensing needle at one end, and the sensing coil movably connected to the other end of the sensing conductive rod, and the movement directions of the sensing needle and the sensing coil are opposite;

[0011] The top end of the sensing needle is connected to the bottom end of a vertically placed inner spring, the inner spring is arranged in an inner spring chamber, the sensing coil is in active contact with the proximity switch, and the proximity switch senses displacement and outputs a signal to the device host.

[0012] The other end of the sensing needle is provided with an inclined surface 1, and one end of the sensing conductive rod is provided with an inclined surface 2, and the inclined surface 1 is in sliding contact with the inclined surface 2 to form a wedge-shaped sliding structure;

[0013] The other end of the induction conduction rod is provided with an inclined surface three, and the inner side of the induction coil is provided with an inclined surface four. The inclined surface three and the inclined surface four are in sliding contact and form a wedge-shaped sliding structure.

[0014] The telescopic column is cylindrical, and a plurality of inclined grooves are arranged in a circular array on the side surface, the inclined grooves extend from the upper end of the telescopic column to the bottom end thereof, and the inner bottom surface thereof is arranged at an angle with the central axis of the telescopic column, and the inner bottom surface of the inclined groove is in matching contact with the inclined surface of the outer end of the wedge block;

[0015] The two inner side surfaces of the inclined groove are respectively provided with mutually parallel embedding grooves, and the embedding grooves are parallel to the inclined surface. The two outer side surfaces of the wedge block are respectively provided with embedding columns, and the embedding columns are slidably arranged in the embedding grooves.

[0016] The expansion piece assembly includes an expansion piece 1 connected to the outer end of the wedge block and an expansion piece 2 abutting against the expansion piece 1. Both the expansion piece 1 and the expansion piece 2 are arc-shaped plate structures and are arranged on the outside of the chuck body. The expansion piece 1 and the expansion piece 2 are connected by screw 4.

[0017] The chuck body comprises a cylinder with two ends opened and connected to each other, a rear annular portion and a front annular portion coaxially arranged at two ends of the cylinder, a middle annular portion is arranged between the rear annular portion and the front annular portion, an induction coil is arranged between the rear annular portion and the middle annular portion, the middle annular portion is fitted and connected with a nylon pad, and the nylon pad is arranged at the position where the rear annular portion is connected to the cylinder;

[0018] The rear end cover is sealed and arranged on the rear annular portion, and the front end cover is sealed and arranged on the front annular portion;

[0019] A plurality of limiting holes are arranged on the side surface of the cylinder, and the wedge-shaped blocks are arranged in the limiting holes so as to slide inwards and outwards.

[0020] The rear end cover is connected to the rear annular portion via a plurality of screws 2, and the front end cover is connected to the front annular portion via screws 3.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] (1) A sensing needle, a sensing conduction rod, and a sensing coil are provided. The sensing needle and the sensing coil move in opposite directions. When the piston moves, the sensing needle is driven to move in the same direction. Since the sensing needle and the sensing conduction rod are wedge-shaped connected, and the sensing conduction rod and the sensing coil are wedge-shaped connected, a movement process of lateral movement-vertical conduction-reverse movement can be formed. The proximity switch is on the outside of the sensing coil. The up and down displacement of the sensing coil is sensed and a signal is output to the main device. Both expansion and resetting have detection signal outputs, which can effectively avoid the chuck from getting stuck and prevent safety accidents;

[0023] (3) An embedded column is provided on the wedge block, and an embedded groove is provided in the inclined groove. Through the relative action of the embedded column and the embedded groove, the telescopic column realizes the front-back linkage driving effect on the wedge block. The structure is simple and the design is ingenious. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an exploded view of the pneumatic chuck structure in the embodiment of the utility model.

[0025] Figure 2 It is the first structural diagram of the pneumatic chuck in the embodiment of the utility model.

[0026] Figure 3 It is a second structural diagram of the pneumatic chuck in the embodiment of the utility model.

[0027] Figure 4 It is a connection structure diagram of the piston and the chuck body in the embodiment of the utility model.

[0028] Figure 5 It is a structural diagram of the chuck body in the embodiment of the utility model.

[0029] Figure 6 It is a connection structure diagram of the telescopic column and the wedge block in the embodiment of the utility model.

[0030] Figure 7 It is a diagram of the installation structure of the wedge block in the embodiment of the utility model.

[0031] Figure 8 It is a schematic diagram of the position structure of the proximity switch in the embodiment of the utility model.

[0032] Fig. 9 It is a schematic diagram of the installation structure of the angle sensing mechanism in the embodiment of the utility model.

[0033] Among them, in the figure: 1, chuck body; 1-0, middle annular portion; 1-1, rear annular portion; 1-2, cylinder; 1-3, front annular portion; 1-4, limit hole; 2, front end cover; 3, telescopic column; 31, inclined groove; 32, embedded groove; 4, wedge block; 41, embedded column; 5, piston; 6, nylon pad; 7, rear end cover; 71, air flow hole; 8, induction needle; 9, induction coil; 10, induction conduction rod; 11, expansion piece 2; 12, expansion piece 1; 14, proximity switch; 17, rubber bag; 18, screw 1 connection hole; 19, screw 2 connection hole; 20, screw 3; 21, screw 4. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0035] See also Figure 1-Figure 9 , a pneumatic expansion chuck capable of inductively outputting expansion and resetting signals, comprising a chuck body 1, a telescopic column 3 arranged in the chuck body 1, a front end cover 2 closed at the bottom end of the chuck body 1, a rear end cover 7 closed at the top end of the chuck body 1, a wedge block 4 passing through the side of the chuck body 1 and connected to the side of the telescopic column 3, the front end cover 2 is arranged near one end of the telescopic column 3, the other end of the telescopic column 3 is connected to a piston 5 through a screw, the piston 5 is arranged at the lower part of the rear end cover 7, an expansion sheet assembly is arranged at the outer end of the wedge block 4, and the expansion sheet assembly is detachably connected to the coil;

[0036] An air flow hole 71 is provided on the rear end cover 7, and the air flow pressure of the air flow hole 71 acts on the upper end surface of the piston 5; an angle sensing mechanism for sensing the expansion position and the reset movement position is provided at the bottom of the piston 5 in the air expansion chuck, and the outside of the angle sensing mechanism is in active contact with the external proximity switch 14, and the proximity switch 14 is connected to the electric control box through the machine wall panel.

[0037] Among them, screw one is installed on screw one connecting hole 18, and screw one connecting hole 18 is located on piston 5.

[0038] The air flow hole 71 is connected to an external air source to pass air into the space between the rear end cover 7 and the piston 5, thereby driving the piston 5 to move.

[0039] The angle sensing mechanism comprises a sensing needle 8 connected to the upper outer end of the piston 5 at one end, a sensing conductive rod 10 vertically movably connected to the other end of the sensing needle 8 at one end, and a sensing coil 9 movably connected to the other end of the sensing conductive rod 10. The movement directions of the sensing needle 8 and the sensing coil 9 are opposite.

[0040] The top of the sensing needle 8 is connected to the bottom of a vertically placed inner spring, which is arranged in a spring chamber. The sensing coil 9 is in active contact with a proximity switch 14, which senses displacement and outputs a signal to the device host.

[0041] Since the proximity switch is a prior art, its specific working principle will not be described in detail, but is hereby explained.

[0042] The other end of the sensing needle 8 is provided with an inclined surface 1, and one end of the sensing conductive rod 10 is provided with an inclined surface 2, and the inclined surface 1 is in sliding contact with the inclined surface 2 to form a wedge-shaped sliding structure;

[0043] The other end of the induction conducting rod 10 is provided with an inclined surface three, and the inner side of the induction coil 9 is provided with an inclined surface four. The inclined surface three and the inclined surface four are in sliding contact and form a wedge-shaped sliding structure.

[0044] By attaching Fig. 9 It is known that inclined surface one is in relative sliding contact with inclined surface two, and inclined surface three is in relative sliding contact with inclined surface four, and the wedge-shaped sliding state thereof is also within the scope that is easily understood by those skilled in the art and will not be described in detail here.

[0045] The telescopic column 3 is cylindrical, and a plurality of inclined grooves 31 are arranged in a circular array on the side surface. The inclined groove 31 extends from the upper end of the telescopic column 3 to the lower end thereof, and its inner bottom surface is arranged at an angle with the central axis of the telescopic column 3. The inner bottom surface of the inclined groove 31 is in matching contact with the inclined surface of the outer end of the wedge block 4.

[0046] The two inner sides of the inclined groove 31 are respectively provided with mutually parallel embedding grooves 32 , and the embedding grooves 32 are parallel to the inclined surface. The two outer sides of the wedge block 4 are respectively provided with embedding columns 41 , and the embedding columns 41 are slidably arranged in the embedding grooves 32 .

[0047] The expansion piece assembly includes an expansion piece 12 connected to the outer end of the wedge block 4 and an expansion piece 2 11 close to the expansion piece 12. Both the expansion piece 12 and the expansion piece 2 11 are arc-shaped plate structures and are arranged on the outside of the chuck body 1. The expansion piece 12 and the expansion piece 2 11 are connected by screws 4 21.

[0048] The chuck body 1 includes a cylinder 1-2 with openings at both ends and connected to each other, a rear annular portion 1-1 and a front annular portion 1-3 coaxially arranged at both ends of the cylinder 1-2, a middle annular portion 1-0 is arranged between the rear annular portion 1-1 and the front annular portion 1-3, an induction coil 9 is arranged between the rear annular portion 1-1 and the middle annular portion 1-0, the middle annular portion 1-0 is fitted and connected with a nylon pad 6, and the nylon pad 6 is arranged at the position where the rear annular portion 1-1 is connected to the cylinder 1-2;

[0049] The rear end cover 7 is closed and arranged on the rear annular portion 1-1, and the front end cover 2 is closed and arranged on the front annular portion 1-3;

[0050] A plurality of limiting holes 1-4 are arranged on the side of the cylinder 1-2, and the wedge blocks 4 are arranged in the limiting holes 1-4 so as to be slidable inwards and outwards.

[0051] The rear end cover 7 is connected to the rear annular portion 1 - 1 by a plurality of screws 2 , and the front end cover 2 is connected to the front annular portion 1 - 3 by screws 3 20 .

[0052] Among them, screw 2 is connected to screw 2 connecting hole 19, and screw 2 connecting hole 19 is located on the rear annular portion 1-1.

[0053] The specific working process of this utility model:

[0054] By using an external air source, air is introduced into the air flow holes 71 provided on the rear end cover 7, and air is first introduced into one of the air flow holes 71. At this time, the air flow acts on the piston 5, and the piston 5 is connected to the telescopic column 3, which promotes the forward and backward movement of the piston 5 and the telescopic column 3. Since the outer side of the telescopic column 3 is provided with a bevel groove 31, the wedge block 4 is connected to the bevel groove 31, and an embedded column 41 is provided on the wedge block 4, and an embedded groove 32 is provided on the bevel groove 31. The embedded column 41 is arranged in the embedded groove 32, so that the telescopic column 3 realizes the linkage driving effect of the wedge block 4, and the wedge block 4 moves in and out of the limiting hole 1-4 of the cylinder 1-2, so as to realize the telescopic movement of the expansion piece 12 and the expansion piece 2 11, and can adjust the clamping force on the coil;

[0055] When the coil is wound, the air hole 71 is deflated. Under the action of the inner spring in the spring chamber, one end of the inner spring is connected to the outer end of the sensing needle 8. The elastic force lifts the piston 5, and the piston 5 drives the telescopic column 3 to move toward the rear end cover 7. At the same time, the embedded column 41 slides in the embedded groove 32, and then the wedge block 4 contracts to realize unwinding.

[0056] In this process, the piston 5 drives the sensing needle 8 to move toward the front end cover 2, the piston 5 compresses the inner spring, the sensing needle 8 naturally drives the sensing conductive rod 10 to slide outward, and the sensing coil 9 slides toward the rear end cover 7, the movement direction of the sensing coil 9 is opposite to that of the sensing needle 8, a guide column is inserted in the sensing coil, an outer spring is arranged on the guide column, the end of the guide column is connected to the middle annular portion 1-0, when the sensing coil 9 slides toward the rear end cover 7, the outer spring is compressed;

[0057] When the piston 5 is reset, i.e., slides toward the rear end cover 7, the outer spring is reset, pushing the induction coil 9 to move toward the front end cover 2, and at this time driving the induction conduction rod 10 to slide inward;

[0058] The induction needle 8, the induction conduction rod, and the induction coil 9 form a motion process of lateral movement-vertical conduction-reverse movement. The external proximity switch 14 senses the displacement on the reverse movement path and outputs a signal to the device host. In order to simplify the design, the inner spring and the outer spring are no longer shown in the figure, but it does not affect the implementation of this solution, so it is hereby explained.

[0059] Technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be elaborated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A pneumatic chuck capable of inductively outputting an expansion reset signal, comprising a chuck body (1), a telescopic column (3) arranged in the chuck body (1), a front end cover (2) closed at the bottom end of the chuck body (1), a rear end cover (7) closed at the top end of the chuck body (1), and a wedge block (4) passing through the side of the chuck body (1) and connected to the side of the telescopic column (3), the front end cover (2) being arranged near one end of the telescopic column (3), the other end of the telescopic column (3) being connected to a piston (5) by a screw, the piston (5) being arranged at the lower part inside the rear end cover (7), an expansion sheet assembly being arranged at the outer end of the wedge block (4), the expansion sheet assembly being detachably connected to the coil, an air flow hole (71) being arranged on the rear end cover (7), the air flow pressure of the air flow hole (71) acting on the upper end surface of the piston (5); characterized in that An angle sensing mechanism for sensing a tightening position and a resetting movement position is arranged at the bottom of the inner piston (5) of the pneumatic chuck, and the outside of the angle sensing mechanism is in active contact with an external proximity switch (14), and the proximity switch (14) passes through the machine wall panel and is connected to the electric control box.

2. The pneumatic chuck capable of inductively outputting expansion and resetting signals according to claim 1, characterized in that: The angle sensing mechanism comprises a sensing needle (8) having one end connected to the upper outer end of the piston (5), a sensing conductive rod (10) having one end vertically movably connected to the other end of the sensing needle (8), and a sensing coil (9) movably connected to the other end of the sensing conductive rod (10), wherein the sensing needle (8) and the sensing coil (9) move in opposite directions; The top end of the sensing needle (8) is connected to the bottom end of a vertically placed inner spring, the inner spring is arranged in a spring chamber, the sensing coil (9) is in active contact with the proximity switch (14), and the proximity switch (14) senses displacement and outputs a signal to a device host.

3. The pneumatic chuck capable of inductively outputting expansion and resetting signals according to claim 2, characterized in that: The other end of the sensing needle (8) is provided with an inclined surface 1, and one end of the sensing conductive rod (10) is provided with an inclined surface 2, wherein the inclined surface 1 is in sliding contact with the inclined surface 2 to form a wedge-shaped sliding structure; The other end of the induction conducting rod (10) is provided with an inclined surface three, and the inner side of the induction coil (9) is provided with an inclined surface four, and the inclined surface three and the inclined surface four are in sliding contact and form a wedge-shaped sliding structure.

4. The pneumatic chuck capable of inductively outputting expansion and resetting signals according to claim 1, characterized in that: The telescopic column (3) is cylindrical, and a plurality of inclined grooves (31) are arranged in a circular array on the side surface. The inclined grooves (31) extend from the upper end of the telescopic column (3) to the lower end thereof, and the inner bottom surface thereof is arranged at an angle with the central axis of the telescopic column (3). The inner bottom surface of the inclined groove (31) is in matching contact with the inclined surface of the outer end of the wedge block (4); The two inner side surfaces of the inclined groove (31) are respectively provided with mutually parallel embedding grooves (32), and the embedding grooves (32) are parallel to the inclined surface. The two outer side surfaces of the wedge block (4) are respectively provided with embedding columns (41), and the embedding columns (41) are slidably arranged in the embedding grooves (32).

5. The pneumatic chuck capable of inductively outputting expansion and resetting signals according to claim 1, characterized in that: The expansion piece assembly comprises an expansion piece 1 (12) connected to the outer end of the wedge block (4) and an expansion piece 2 (11) close to the expansion piece 1 (12). Both the expansion piece 1 (12) and the expansion piece 2 (11) are arc-shaped plate structures and are arranged on the outer side of the chuck body (1). The expansion piece 1 (12) and the expansion piece 2 (11) are connected by screw 4 (21).

6. The pneumatic chuck capable of inductively outputting expansion and resetting signals according to claim 1, characterized in that: The chuck body (1) comprises a cylinder (1-2) with two ends open and connected to each other, a rear annular portion (1-1) and a front annular portion (1-3) coaxially arranged at the two ends of the cylinder (1-2), a middle annular portion (1-0) being arranged between the rear annular portion (1-1) and the front annular portion (1-3), an induction coil (9) being arranged between the rear annular portion (1-1) and the middle annular portion (1-0), the middle annular portion (1-0) being fittedly connected to a nylon pad (6), and the nylon pad (6) being arranged at a position where the rear annular portion (1-1) and the cylinder (1-2) are connected; The rear end cover (7) is closed and arranged on the rear annular portion (1-1), and the front end cover (2) is closed and arranged on the front annular portion (1-3); A plurality of limiting holes (1-4) are arranged on the side surface of the cylinder (1-2), and the wedge-shaped blocks (4) are arranged in the limiting holes (1-4) so ​​as to slide inwards and outwards.

7. The pneumatic chuck capable of sensing expansion and resetting signal output according to claim 6, characterized in that: The rear end cover (7) is connected to the rear annular portion (1-1) via a plurality of screws 2, and the front end cover (2) is connected to the front annular portion (1-3) via screws 3 (20).

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