KR200423455Y1 - Clamp Crimping Tool - Google Patents

Abstract

Disclosed is a hand tightening device for clamping brackets for material joints, which is easy to operate and obtains a large force. The tightening device according to the present invention includes a cylinder housing, an operation piston embedded in the housing, an air connection port formed at one end of the housing to supply air to the piston, a lever and a valve selectively intermittently supplying air supplied from the air connection port, and It is formed on the other end of the housing and includes a clamping portion that the clamp jaws of the tong shape is retracted and opened as the piston moves forward and backward. Here, in the cylinder housing, a plurality of sealed partitions are formed at equal intervals, and the connecting pistons are continuously embedded therein, whereby a greater force can be obtained. It may also be used in conjunction with more than one housing to house a large number of pistons. That is, a coupling is used to couple the connections of two or more housings, and the coupling serves to serve as one partition.

Description

Hand clamping device for clamping brackets for material joints {Clamp Crimping Tool}

1 is an exploded perspective view showing a conventional automobile spherical material joint and a conventional corrugated boot assembly structure mounted thereto;

Figure 2 is a partial cutaway cross-sectional view showing the assembly state of the material joint shown in FIG.

Figure 3 is a plan view showing a conventional clamp deployment state mounted to the material joint of Figures 1 and 2,

Figure 4 is a schematic front view showing the assembled state of the clamp shown in Figure 3,

5 is a detailed cross-sectional front view of the portion A of FIG.

6 is a perspective view of a tightening device according to a first embodiment of the present invention,

7 is a longitudinal cross-sectional view of the tightening apparatus shown in FIG. 6,

8 is a cross-sectional view from above of the clamping part shown in FIG. 6;

9 is a state diagram used in the tightening apparatus according to the first embodiment of the present invention,

10 is a perspective view showing a tightening device according to a second embodiment of the present invention,

FIG. 11 is a longitudinal sectional view of the tightening device shown in FIG. 9;

12 is a perspective view of a tightening device according to a third embodiment of the present invention,

FIG. 13 is a longitudinal sectional view of the tightening device shown in FIG. 12. FIG.

<Description of the symbols for the main parts of the drawings>

11: boot 12: clamp

57: crimping portion

100, 200, 300: Hand tightening device for clamping bracket for material joint

110 housing 120 operating piston

122: actuator 130: valve body

135 valve body 140 air connection port

150: lever 160: clamping part

170a, 170b: clamp jaw 210: housing

212: compressed air discharge hole 220: partition

240: connecting piston 242: air flow ball

244: air supply hole 310, 320: housing

330 Coupling

The present invention relates to a clamp tightening device, and more particularly, to a hand tightening device of a clamping bracket for a material joint for easily tightening a clamp bracket for fixing a universal joint boot used as a joining tool. will be.

In general, the drive shaft in the automobile is connected to the output shaft of the transmission to serve to transmit the rotational power transmitted from the engine to the drive wheel.

The drive shaft is provided with a material joint to change the angle according to the displacement of the wheel according to the driving state, that is, to be able to be bent, so as to smoothly transmit the rotational power output from the transmission to the driving wheel.

On the other hand, the material joints vary in shape and number of installation depending on the position of the driving wheel, the type of suspension and steering system, etc. In the formal classification, the driving shaft is oscillated simultaneously with the rotation of the driven shaft. Because the effective radius changes, it is divided into inconstant material joints which become inconstant velocity and constant speed joints that can rotate at constant speed because the contact point between the driving shaft and the driven shaft is always located on the bisecting line of the deflection angle.

In addition, the classification route according to the arrangement is divided into a wheel-side material joint that can accommodate the steering angle by the steering system, and a transmission-side material joint that can absorb the maximum displacement amount due to the vertical movement of the suspension system.

Among the above-mentioned material joints, the constant velocity joints are typically tripod joints, double offset joints, ball-type joints, and double spider joints. Can be mentioned.

Meanwhile, among the constant velocity joints, tripod joints, double offset joints, and spherical joints are ball or rollers which achieve sliding displacements in the housing and in the housing for smooth bending displacement or axial displacement simultaneously with high speed driving. Lubricating oil is injected between the sliding members of the back and the like, and a boot for preventing the inflow of foreign substances and preventing the lubricant from being lost to the outside is covered.

Here, an example of the spherical material joint on the wheel side of the constant velocity material joint using the lubricating oil and the boot as described above is illustrated in FIGS. 1 and 2.

As shown in the accompanying drawings, an inner race having an axle-side drive shaft 10 to which rotational power is transmitted from the transmission to the central shaft hole 31 and having a plurality of arc-shaped ball contact surfaces 32 on the outer circumferential surface thereof (inner) a ball cage 40 having a rase 30, each ball 41 positioned outside the inner race 30 and in contact with each arc-shaped ball contact surface 32, and one side of which is open; It consists of the ball housing 21 of the wheel side drive shaft 20 which has a space part, and has the semicircular rail groove 22 of the axial direction so that the ball 41 of the said ball cage 40 may contact the inner peripheral surface of the space part.

Meanwhile, the corrugated boot 11 which prevents foreign substances such as dust from flowing into the ball housing 21 and prevents leakage of lubricants such as grease injected into the ball housing 21 from the outside is seen. Covered to the open side of the housing 21, one end of the corrugated boot 11 to the axle-side drive shaft 10, the other end to the front end of the ball housing 21 by sealing in the ball housing 21 The clamps 12 and 13 are fixed.

The spherical material joint of the vehicle drive shaft configured as described above has an inner race 30 fastened to the axle-side drive shaft 10 according to the displacement of the wheel according to the driving state to the arc contact surface 32 and the ball cage 40. Sliding flow between the inserted ball 41 and the arc-shaped rail groove 22 of the ball housing 21 can give a bending change. At this time, the amount of bending displacement is about 47 °, and no potential in the axial direction is achieved, and the arc contact surface 32 and the ball cage 40 of the rail groove 22 and the inner race 30 of the ball housing 40 41) the oil film is formed by the injected lubricating oil to minimize the frictional force due to sliding.

At this time, the clamp of the material joint is a metal strip shape, and as shown in FIG. 3 in FIG. 3, a tongue portion 51 and a coupling protrusion 53 are formed at one end, and the coupling protrusion is formed at the other end. Coupling hole 55 and the pressing portion 57 to be coupled to the 53 is formed, respectively.

Therefore, when the clamp 12 is fastened to the boot 11 as illustrated in FIGS. 4 and 5, the one end of the boot 11 formed with the tongue portion 51 and the engaging protrusion 53 is positioned downward. The outer periphery of the boot 11 is wound around the circular circumference by engaging the engaging projection 53 is fitted into the coupling hole 55 of the other end, and then pressing the pressing portion 57 on both sides so that the entire clamp (12) shrinkage deformation. Tighten the outer circumference.

Here, clamping of clamps should be done accurately and steadily in the booting operation of constant velocity joints. Until now, there is no proper tool to tighten the clamps firmly. It is true. Therefore, there is a problem that the clamping force of the clamp is weak and unstable, and the work itself is inefficient, resulting in poor maintenance quality.

The present invention is devised to solve the above problems, the purpose of the present invention is to press the crimping portion of the clamp joint for the material jointly strongly, it is operated by air, with a plurality of pistons to obtain a large force It is to provide a hand tightening device for the clamping bracket for the material joints made.

The present invention to achieve the above object,

Cylinder housings;

An operation piston embedded in the housing;

An air connector formed at one end of the housing to supply air to the piston;

A lever and a valve for selectively intermittent air supplied from the air connection port; And

It is provided on the other end of the housing provides a hand clamping device for clamping metal fittings, characterized in that it comprises a clamping portion that the clamp jaw-shaped clamp jaw is opened and closed as the piston moves forward and backward.

Here, it is preferable that a discharge hole for discharging the compressed air in the piston is formed on the side surface of the upper end of the valve body included in the valve when the valve body is elevated.

In addition, the clamping portion has a pair of clamp jaws symmetrical with each other such that the front portion has a tong shape, and the actuating piston is preferably formed with a pointed actuator coming into and out of the housing so that the actuator is selectively inserted into the overlapping rear portion of the clamp jaw.

In addition, it is preferable that rollers rotated to be inserted into the rear portions of the clamp jaws so that the front portions of the actuator are smoothly inserted.

Meanwhile, in the cylinder housing, a plurality of sealed partitions are formed at equal intervals, and the connecting pistons are continuously embedded therein, respectively, and in the center of the connecting pistons, horizontally formed air flow holes are formed to communicate with the discharge holes. An air supply hole for supplying air to the next connection piston is formed at the end of the flow hole, and a compressed air discharge hole may be formed in the housing between each partition and each connection piston.

And the housing is connected to one or more, the connection portion is coupled to the coupling, the coupling serves as one partition, the coupling may be formed with compressed air discharge holes communicated to the outside.

Hereinafter, with reference to the accompanying drawings will be described for the hand tightening device of the clamping bracket for the material joint according to a preferred embodiment of the present invention.

<Example 1>

6 is a perspective view of a tightening device according to a first embodiment of the present invention, FIG. 7 is a longitudinal cross-sectional view of the tightening device shown in FIG. 6, and FIG. 8 is a sectional view seen from above of the clamping part shown in FIG. 6.

The tightening device according to the first embodiment of the present invention is a tightening device operated by one piston as shown in FIGS. 6 to 8, the housing 110 and an air connector 140 formed at the rear of the housing 110. ) And a valve portion, and a clamping portion 160 formed in front of the housing 110.

The housing 110 has a double cylindrical shape, and closing caps 112a and 112b are mounted at both open ends. One operating piston 120 is embedded in the housing 110, and a sealing packing is inserted into an outer circumferential surface of the operating piston 120. In addition, an actuator 122 having a sharp shape in front of the housing 110 is formed on the front portion of the operation piston 120. Preferably, the actuating piston 120 is a compression spring 124 is inserted between the actuating piston 120 and the closing cap 112b to generate a repulsive force.

The valve body 130 is formed on the outside of the closing cap 112a at the rear of the housing 110, and the air connector 140 is formed at the rear of the valve body 130. Here, the air inlet hole 114 for supplying air into the housing 110 is formed at the center of the closing cap 112a, and the air inlet hole 114 is formed from the air connector 140 in the valve body 130. An air supply passage 131 is formed to be connected to. The air supply passage 131 is not only connected to the air connection port 140 from the air access hole 114, but also communicates with the outer circumferential surface of the valve body 130, the valve is formed in this air supply passage 131.

The valve is provided with a conventional valve body 135 that is elastically supported to open the air supply passage 131 when descending to communicate air from the air connection 140 to the air inlet hole 114, and when raised, the air supply passage 131 ) To stop the air supply. On the side of the upper end portion of the valve body 135, an air discharge hole 136 is formed which opens through the axial center of the valve body 135. That is, the air discharge hole 136 has a structure that closes when the valve body 135 descends, and opens when the valve body 135 descends. A lever 150 for selectively pressing the valve body 135 is hinged on the outer circumferential surface of the valve body 130 adjacent to the valve body 135. By the lever 150, the valve body 135 descends and is lifted again by its own elasticity.

Meanwhile, the clamping part 160 formed at the front of the housing 110 may include a pair of upper and lower plates 161 and lower plates 162 and upper and lower plates 161 and 162 attached to the front surface of the closing cap 112b. Clamp jaws 170a and 170b, which are selectively retracted and opened in between, are coupled.

The upper plate 161 and the lower plate 162 are disposed in parallel with each other at a predetermined interval and are formed such that the actuator 122 is located at the center. The clamp jaws 170a and 170b embedded between the upper plate 161 and the lower plate 162 have a tong shape that is symmetrical with each other at the distal end thereof, and is based on the horizontal center of the upper plate 161 and the lower plate 162. Is turning. More specifically, each clamp jaw (170a, 170b) is hinged to the upper plate 161 and the lower plate 162 to the forceps portion, the compression spring (174) between each clamp jaw (170a, 170b) It is inserted so that the tongs of the clamp jaws 170a and 170b are always open. In addition, the rear portions of the clamp jaws 171a and 170b are in contact with each other, and rollers 172a and 172b are inserted in the longitudinal direction at the respective contact portions thereof. That is, the pair of rollers 172a and 172b are disposed to face each other, and the tip of the actuator 122 is positioned between the rollers 172a and 172b to prepare for entry by the operation of the piston 120. .

Hereinafter, the operating state of the tightening device 100 according to the first embodiment of the present invention formed as described above will be briefly described.

9 is a state diagram used in the tightening apparatus according to the first embodiment of the present invention.

First, an external compressor (not shown) is connected to the air connector 140 so that air is filled in the air supply passage 131.

In this state, as shown in FIG. 9, the clamping portion 57 of the clamp bracket 12 is bitten by the forceps of the clamp jaws 170a and 170b, and then the lever 150 is pressed.

When the lever 150 is pressed, the valve body 135 descends and the air supply passage 131 is opened. Accordingly, the working piston 120 is moved while the air flows into the air access hole 114.

As the working piston 120 is moved, the actuator 122 formed at the front portion thereof enters between the rollers 172a and 172b, and the tongs of the clamp jaws 170a and 170b are retracted.

Therefore, the crimping portion 57 of the clamp bracket 12 is crimped to engage the boot 11.

When the work is completed and the lever 150 is released, the valve body 135 is raised and lowered by the elasticity of the valve body 135, and the supply of air is stopped.

When the supply of air is stopped, the actuating piston 120 and the clamp jaws 170a and 170b are pushed back by the repulsive force of the compression spring 124 inserted into the actuating piston 120, and the clamp jaws of the clamp jaws 170a and 170b are pushed back. The part will open again. The air filled in the working piston 120 is discharged outward while flowing backward along the air inlet hole 114 of the closing plate 112a and the air outlet hole 136 of the valve body 135.

<Example 2>

10 is a perspective view of a tightening device according to a second embodiment of the present invention, and FIG. 11 is a longitudinal sectional view of the tightening device shown in FIG. 10.

Hand tightening device according to a second embodiment of the present invention is characterized in that a plurality of pistons in the housing 210 as shown in FIG.

In order to form a plurality of pistons in the housing 210, a plurality of partitions 220 partitioning a space are formed in the housing 210 at equal intervals. The sealing packing is inserted on the outer circumferential surface of the partition 220, and the snap ring 230 is mounted at the front and the rear of the partition 220 to fix the partition 220.

As such, the connecting piston 240 is embedded in the housing 210 in which the partition 220 is formed. The connecting piston 240 has a “ㅓ” shape, and an air flow hole 242 is formed in the center of the transverse direction, and the other side of the connecting piston 240 is disposed while passing through each partition 220. Each connecting piston 240 is continuously disposed to overlap each other, and an air supply hole 244 for supplying air to the next piston is formed at the other end of each connecting piston 240. In addition, a compressed air discharge hole 212 penetrated to the outside of the housing 210 is formed between each partition 220 and the connecting piston 240.

Hereinafter, the operating state of the hand tightening device 200 according to the second embodiment of the present invention formed as described above will be briefly described.

First, the principle of operation is the same as that of the first embodiment, and only the operation in the housing 210 will be described.

When air is supplied by the lever 150, air is introduced into the first connecting piston 240, and the introduced air is not only the first connecting piston 240 but also the air flow hole 242 formed in each connecting piston 240. And through the air supply hole 244 to supply air to the next connection piston 240 and the operation piston (120).

Therefore, in the hand tightening device 200 according to the second embodiment of the present invention, the series force pushing in turn from the first connecting piston 240 and the parallel force pushed by each connecting piston 240 and the working piston 120 are added together. It is applied to the jersey clamp jaw (170a, 170b). That is, the clamping force of the clamp jaws (170a, 170b) that can occur in the single cylinder cylinder can be generated in proportion to the number of pistons.

On the other hand, when the operation is completed and the lever 150 is released, while the operating piston 120 is reversed, the air supplied to each piston falls back along the air flow hole 242 of each piston, and thus the air access hole 114 and the valve body. It is discharged through the air discharge hole 136 of (135).

<Example 3>

12 is a perspective view of a tightening device according to a third embodiment of the present invention, and FIG. 13 is a longitudinal sectional view of the tightening device shown in FIG. 12.

In the hand tightening device according to the third embodiment of the present invention, as shown in the second embodiment, it is possible to embed several pistons in the housing, but when a large number of pistons are incorporated, it is difficult to mount the partition and the snap ring. Consideration has been given to the case where one or more housings must be connected and used.

For example, as shown in FIGS. 12 and 13, when the two housings 310 and 320 are connected to each other, a coupling 330 is used at the connection portion, and the coupling 330 and each of the housings 31 and 320 are used. ) Is fastened by screwing.

Here, the coupling 330 serves as a partition, and the compressed air discharge hole 332 is formed to communicate with the outside of the coupling 330.

As described above, the hand clamping device of the clamping bracket for the material joint according to the present invention is not only manufactured to be small enough to be held by one hand but also generates a large force because several cylinders have parallel and series structures. There is an advantage that can be easily used in various work lines.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the present invention described in the utility model registration claims. It will be appreciated.

Claims (7)

Cylinder housings; An operation piston embedded in the housing; An air connector formed at one end of the housing to supply air to the working piston; A lever and a valve for selectively intermittent air supplied from the air connection port; And a clamping portion which is formed at the other end of the housing and is clamped in a clamp-shaped clamp jaw according to the forward and backward movement of the actuating piston. 2. The hand tightening device for clamping metal fittings according to claim 1, wherein an air discharge hole for discharging the compressed air when the working piston is retracted is formed on the upper side surface of the valve body included in the valve. According to claim 1, wherein the clamping portion has a pair of clamp jaws symmetrical to each other so that the front portion has a tong shape, the actuating piston is formed with a pointed actuator to the front of the housing so that the actuator overlaps the rear portion of the clamp jaw Hand clamping device of the clamping bracket for the material joint, characterized in that it is selectively inserted in. [4] The hand fastening device of claim 3, wherein rollers which are rotated to be inserted into the front of the actuator are inserted into the overlapping rear portions of the clamp jaws. According to claim 1 or claim 2, wherein the cylinder housing is formed in a plurality of sealed partitions at equal intervals in each of the connecting pistons are continuously embedded therein, the center of the connecting piston in the air penetrates in the transverse direction A flow hole is formed to communicate with the air discharge hole, and an air supply hole for supplying air to the next connection piston is formed at the end of the air flow hole, and a compressed air discharge hole is formed in the housing between each partition and each connection piston. Hand tightening device for clamping brackets for material joints, characterized in that the. 6. The hand tightening device for clamping metal fittings according to claim 5, wherein a snap ring for fixing the partition is mounted in front and rear of the partition. The method of claim 5, wherein the housing is connected to one or more, the connection portion is coupled to the coupling, the coupling serves as one partition, the coupling is formed with compressed air discharge hole communicating with the outside Hand tightening device for clamping brackets for material joints, characterized in that the.

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