CN201437191U

CN201437191U - Clamping device

Info

Publication number: CN201437191U
Application number: CN200920155343XU
Authority: CN
Inventors: 焦金明; 武怀礼; 司万强
Original assignee: CNR Datong Electric Locomotive Co Ltd
Current assignee: CRRC Datong Co Ltd
Priority date: 2009-05-20
Filing date: 2009-05-20
Publication date: 2010-04-14
Anticipated expiration: 2019-05-20

Abstract

The utility model relates to a clamping device. The clamping device comprises a bracket and a tightening screw rod, wherein, the bracket comprises a lower supporting pole, a front clamping arm and a back clamping arm; the front clamping arm and the back clamping arm are vertically positioned on the same side of the lower supporting pole; the front clamping arm is at a specified distance away from the back clamping arm; a through screw hole is formed at the upper part of the back clamping arm; and the tightening screw rod penetrates through the screw hole and is arranged towards the front clamping arm. The utility model has the advantages of simple structure, convenient operation, high reliability and wide adaptability, effectively reduces manufacturing cost, and is particularly applied to the ground wire welding construction.

Description

Clamping device

Technical Field

The utility model relates to an anchor clamps especially relate to a binding clasp that uses in welding construction.

Background

As is well known, during the process of welding the components of the locomotive board, when welding the ground wire, the following methods are generally adopted: once, the exposed end is directly welded without using a jig, but the welding is interrupted by careless movement of the welded member during welding, and therefore, the reliability of this method is low. The mode that the ground wire clamp is clamped on the workpiece to be welded is adopted, although the mode is reliable, when the workpiece is welded, large current is required to pass through and the current value is often changed, and the ground wire clamp is small in structural size and easy to burn and lose by current when being frequently used, so that the ground wire clamp cannot meet the requirement of the large current, and the ground wire clamp needs to be frequently replaced, and the production cost is increased.

In addition, chinese patent No. CN2083979U describes an electric welding ground wire clamp, which comprises an upper handle and a lower handle hinged by a hinge shaft, a pawl transversely passing through a hole above the upper handle, and a compression spring arranged on one side of the pawl. The length of the clamp handle is prolonged, and a lever principle is utilized, so that a large clamping force can be obtained by applying a small external force, but the structure is complex, and the pawl is pushed by the spring piece, so that a welded workpiece can be in a clamping state after the hand is loosened, and high production cost is required.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a binding clasp, this binding clasp not only simple structure, convenient operation, reliability are high, can effectively reduction in production cost moreover.

In order to achieve the purpose, the utility model provides a clamp, include the support and screw up the screw rod, the support include down branch and locate perpendicularly branch, just be located down branch is preceding arm lock and back arm lock with one side, preceding arm lock with separate the interval of regulation between the back arm lock, the upper portion of back arm lock is equipped with the screw that link up, screw up the screw rod and pass the screw orientation preceding arm lock set up.

The bracket is in a transverse F shape, and the front clamping arm is fixedly arranged at one end of the lower support rod to form an integral structure.

The tightening screw rod comprises a screw rod body, the screw rod body faces to one end of the front clamping arm, a clamping head is installed at one end of the screw rod body, and a handle is installed at the other end of the screw rod body.

The upper end of the front clamping arm is provided with a clamping plane, and the clamping plane corresponds to the clamping head in position.

Wherein, the back arm lock welded fastening be in lower branch on.

The lower part of the rear clamping arm is provided with a sleeve hole, the rear clamping arm is sleeved on the lower supporting rod through the sleeve hole, at least one side wall of the rear clamping arm is provided with a positioning screw hole communicated with the sleeve hole, a positioning screw is screwed in the positioning screw hole, and the front end of the positioning screw hole is propped against the lower supporting rod.

Wherein, a positioning groove is arranged in the length direction of the lower support rod, and the front end of the positioning screw is tightly embedded in the positioning groove.

And the other end of the lower support rod, which is opposite to the front clamping arm, is provided with a connecting hole.

The lower support rod, the front clamping arm and the rear clamping arm are made of metal conductor materials, and the lower support rod 11 is 220mm in length, 35mm in width and 35mm in thickness; the length of the front clamping arm 12 is 117.5mm, the width is 35mm, and the thickness is 20 mm; the length of the rear clamping arm 13 is 135mm, and the width of the rear clamping arm is 35 mm; the thickness is 25 mm.

The utility model discloses compare with current structure down, the utility model has the following characteristics and advantage:

the utility model discloses a binding clasp sets up the screw rod of screwing in and screwing out on the back arm lock of its support, and the cooperation through screwing up screw rod and preceding arm lock is pressed from both sides tightly by the welding piece, screws up the centre gripping interval between screw rod and the preceding arm lock and can be according to the free nimble regulation of different work condition, and accommodation is wide, and the quick clamp is pressed from both sides tightly when the ground wire that the specially adapted locomotive panel part assembly welded is welded and is welded by the steel sheet.

And, the utility model discloses a binding clasp still can set into mobilizable connection structure with back arm lock and lower branch, and back arm lock can slide on it as the guide rail through lower branch to according to actual construction operating mode location in appropriate position, just so make the interval between preceding arm lock and the back arm lock can adjust, improved the flexibility of using. Meanwhile, the clamping head and the clamping plane are arranged in an alignment mode, and the reliability of the clamping device is improved.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein,

fig. 1 is a schematic structural view of a first embodiment of the clamping device of the present invention;

fig. 2 is a schematic perspective view of the tightening screw of the present invention;

fig. 3 is a schematic structural view of a second embodiment of the clamping device of the present invention;

fig. 4 is a schematic perspective view of a rear clamp arm according to a second embodiment of the present invention;

fig. 5 is a schematic perspective view of a third embodiment of the clamping device of the present invention;

fig. 6 is a schematic front view of a third embodiment of the clamping device of the present invention;

fig. 7 is a schematic top view of a third embodiment of the clamp of the present invention;

fig. 8 is a schematic perspective view of a bracket according to a third embodiment of the present invention.

Description of reference numerals:

1-a scaffold; 11-lower support bar; 12-front clamping arm; 13-rear clamping arm; 2-screwing the screw rod; 21-a screw body; 22-a gripping head; 23-a handle; 31-a clamping plane; 4-connecting holes; 5-a set screw; 6-trepanning; 7-positioning screw holes; 8-screw holes; 9-positioning grooves; 10-set screw.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1 to 8, the utility model discloses the binding clasp includes support 1 and screws up screw rod 2, support 1 includes down branch 11 and locate down branch 11 perpendicularly, and lie in down branch 11 with preceding arm lock 12 and back arm lock 13 of one side, separate the interval of regulation between preceding arm lock 12 and the back arm lock 13, the upper portion of back arm lock 13 is equipped with the screw 8 that link up, screws up screw rod 2 and passes the setting of screw 8 towards preceding arm lock 12, screws up the one end of screw rod 2 promptly and stretches out this screw 8 towards the direction of preceding arm lock 12.

The first embodiment is as follows:

fig. 1 is a schematic structural view of a first embodiment of the clamping device of the present invention; fig. 2 is a schematic perspective view of the tightening screw of the present invention. As shown in fig. 1, the utility model discloses a clamp, including support 1 and tightening screw 2, support 1 is horizontal F type, comprises lower branch 11, preceding arm lock 12 and back arm lock 13, and wherein preceding arm lock 12 sets up in branch 11 one side down to form a body structure with lower branch 11, back arm lock 13 keeps in same one side with preceding arm lock 12, and separates the distance welded fastening of regulation on lower branch 11 with preceding arm lock 12. A through screw hole 8 (shown in fig. 4) is formed in one side of the rear clamping arm 13 away from the fixed end of the lower support rod 11, and is used for being matched with the tightening screw rod 2.

Referring to fig. 1 and 2, the tightening screw 2 includes a screw body 21, a clamping head 22 and a handle 23. The tightening screw 2 is screwed into the screw hole 8 on the rear clamping arm 13 and extends out towards the front clamping arm 12. The screw rod body 21 is provided with an external thread, the screw hole 8 on the rear clamping arm 13 is internally provided with an internal thread, and the screw rod body 21 is connected with the screw hole 8 in a thread fit manner. A clamping head 22 is mounted on one end of the screw body 21 facing the front clamping arm 12, and a handle 23 is mounted on the other end of the screw body 21. The end surface of the clamping head 22 contacting with the workpiece is a flat surface, the upper end of the front clamping arm 12 is provided with a clamping plane 31 facing to one side of the rear clamping arm 13, the position of the clamping plane 31 corresponds to that of the clamping head 22, and the clamping plane 31 and the clamping head 22 are matched to clamp the workpiece. In the present embodiment, on the premise of maintaining the specified operation distance between the front arm 12 and the rear arm 13, the clamping plane 31 protrudes toward the rear arm 13 side relative to the front arm 12, so that the protruding clamping plane 31 only needs to be processed into a flat surface meeting the process requirements, and thus, the present invention is more suitable for processing and saves the processing cost.

The lower support 11, the front clamping arm 12 and the rear clamping arm 13 are made of metal materials, such as conductive metals like steel and iron. The length of the lower supporting rod 11 is 220mm, the width is 35mm, and the thickness is 35 mm; the length of the front clamping arm 12 is 117.5mm, the width is 35mm, and the thickness is 20 mm; the length of the rear clamping arm 13 is 135mm, and the width of the rear clamping arm is 35 mm; the thickness is 25 mm. Because the utility model discloses a metal conducting material and its size is far more than the size of current ground wire pincers, therefore has good electric conductive property, can bear the change of heavy current and not fragile, has reduced manufacturing cost. Meanwhile, one end of the lower support rod 11 is provided with a connecting hole 4, so that the lower support rod can be conveniently matched with other workpieces for use.

In this embodiment, the lower support 11 and the front arm 12 are integrally formed, the rear arm 13 is fitted around the lower support 11, the upper end of the front arm 12 is provided with a clamping plane 31 protruding toward one side of the rear arm 13, the clamping plane 31 is used as a reference plane, the upper end of the rear arm 13 is provided with a screw hole 8 aligned with the clamping plane 31, the screw body 21 is screwed into the screw hole 8, the clamping head 22 is installed at the protruding end of the screw body 21 toward the clamping plane 31, the handle 23 at the other side of the screw body 21 is manually rotated, and the workpiece to be welded is clamped by the alignment and matching of the clamping head 22 and the clamping plane 31. In this embodiment, the lower support 11 and the front arm lock 12 are integrally formed, so that when the front arm lock 12 and the rear arm lock 13 are clamped together, the external force borne by the front arm lock 12 is larger, and the front arm lock is not easy to damage or deform, and the welded component is clamped more firmly and reliably.

During welding, a workpiece to be welded, such as a steel plate, is placed in a space formed by the front clamping arm 12 and the rear clamping arm 13, the workpiece to be welded is leaned against the protruding clamping plane 31, the handle 23 is manually rotated, the position of the clamping head 22 is controlled through the rotating amount of the screw rod body 21 and the screw hole 8, finally the workpiece to be welded is clamped through the alignment matching of the clamping head 22 and the clamping plane 31, and welding operation can be carried out by technicians. After the welding operation is finished, technicians only need to unscrew and screw the screw rod 2, and the welded part can be detached, so that the welding operation is very convenient and flexible.

Example two

Fig. 3 is a schematic structural view of a second embodiment of the clamping device of the present invention; fig. 4 is a schematic perspective view of a rear clamp arm according to a second embodiment of the present invention. As shown in fig. 3, in the present embodiment, a sleeve hole 6 is formed at a lower portion of the rear arm 13, the rear arm 13 is sleeved on the lower support rod 11 through the sleeve hole 6, a positioning screw hole 7 penetrating through the sleeve hole 6 is formed on at least one side wall of the rear arm 13, a positioning screw 5 is screwed in the positioning screw hole 7, a front end of the positioning screw 5 abuts against the lower support rod 11, and the rear arm 13 is positioned on the lower support rod 11. In order to increase the fixing strength between the rear clamping arm 13 and the lower support rod 11, two side walls of the rear clamping arm 13 are respectively provided with a positioning screw hole 7 penetrating through the sleeve hole 6, when the rear clamping arm is installed, the positioning screws 5 can be screwed into the positioning screw holes 7 at two sides of the rear clamping arm 13 and abut against the lower support rod 11, and the rear clamping arm 13 is fixed on the lower support rod 11.

When the clamping device is used, the rear clamping arm 13 can slide along the lower support rod 11 according to different welding parts, when the rear clamping arm 13 slides to a proper position, the positioning screw 5 is screwed, the front end of the positioning screw 5 penetrates through a screw hole formed in the rear clamping arm 13 and pushes the lower support rod 11 tightly, and the rear clamping arm 13 is positioned on the lower support rod 11. At this time, the handle 23 is rotated as necessary, and the workpiece to be welded is clamped by the clamping head 22 on the screw body 21 and the clamping plane 31 in alignment and fit, so that the welding operation can be performed by the technician. In this embodiment, the positioning position of the rear clamping arm 13 on the lower support rod 11 can be freely adjusted according to the size of the welded part, and the device has the advantages of convenience, flexibility and wide application range.

Other structures, working principles and beneficial effects of the embodiment are the same as those of the first embodiment, and are not described herein again.

EXAMPLE III

As shown in fig. 5 to 8, the present embodiment is different from the second embodiment in the fixing manner of the rear clamp arm 13 and the lower support 11. Specifically, in the second embodiment of the present invention, since a certain gap exists between the sleeve hole 6 of the rear arm 13 and the lower support 11, the rear arm 13 is easy to move on the lower support 11 in a direction perpendicular to the length direction of the lower support 11, thereby reducing the clamping strength and even affecting the normal use of the clamp.

In this embodiment, a positioning groove 9 is formed in one side or two side surfaces of the lower support rod 11 in the length direction, the positioning groove 9 corresponds to the positioning screw hole 7, the positioning groove 9 is in a long strip shape, a positioning screw 10 can be screwed into the positioning screw hole 7, the front portion of the positioning screw 10 extends towards one side of the lower support rod 11, and the extended front end of the positioning screw is tightly embedded in the positioning groove 9. In this embodiment, the positioning screw 10 is tightly embedded in the positioning groove 9, so that the positioning groove 9 can limit the movement of the positioning screw 10, and further limit the movement of the rear clamping arm 13 on the lower support 11 along the length direction perpendicular to the lower support 11, thereby ensuring the clamping strength and normal use of the clamping device.

Other structures, working principles and beneficial effects of the embodiment are the same as those of the second embodiment, and are not described herein again.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any technical personnel in this field, the equivalent change and the modification made under the prerequisite that does not deviate from the utility model discloses a concept and principle, for example when being connected of back arm lock 13 and lower branch 11, can also adopt and set up a plurality of locating holes along length direction on lower branch 11, offer the through-hole on the back arm lock 13, through the bolt of inserting in through-hole and locating hole, carry out modes such as location to back arm lock 13 and lower branch 11, all should belong to the scope of the protection of the utility model.

Claims

1. A clamp, characterized by: the clamping device comprises a support and a tightening screw rod, the support comprises a lower support rod, a front clamping arm and a rear clamping arm, the front clamping arm and the rear clamping arm are vertically arranged on the lower support rod and are positioned on the same side of the lower support rod, a specified interval is reserved between the front clamping arm and the rear clamping arm, a through screw hole is formed in the upper portion of the rear clamping arm, and the tightening screw rod penetrates through the screw hole and faces the front clamping arm.

2. The clamp of claim 1, wherein: the support is in a transverse F shape, and the front clamping arm is fixedly arranged at one end of the lower supporting rod to form an integral structure.

3. The clamp of claim 1, wherein: the tightening screw rod comprises a screw rod body, a clamping head is arranged at one end, facing to the front clamping arm, of the screw rod body, and a handle is arranged at the other end of the screw rod body.

4. The clamp of claim 3, wherein: the upper end of the front clamping arm is provided with a clamping plane, and the clamping plane corresponds to the clamping head in position.

5. The clamp of any one of claims 1 to 4, wherein: the rear clamping arm is welded and fixed on the lower supporting rod.

6. The clamp of any one of claims 1 to 4, wherein: the lower part of back arm lock be equipped with the trepanning, back arm lock establish through this trepanning on the lower branch at least one side wall of back arm lock be equipped with the positioning screw that the trepanning is linked together, a set screw spiro union in positioning screw, its front end top support in lower branch.

7. The clamp of claim 6, wherein: a positioning groove is formed in the length direction of the lower support rod, and the front end of the positioning screw is tightly embedded in the positioning groove.

8. The clamp of claim 2, wherein: and the other end of the lower support rod, which is opposite to the front clamping arm, is provided with a connecting hole.

9. The clamp of claim 1, wherein: the lower support rod, the front clamping arm and the rear clamping arm are made of metal conductor materials, and the lower support rod 11 is 220mm in length, 35mm in width and 35mm in thickness; the length of the front clamping arm 12 is 117.5mm, the width is 35mm, and the thickness is 20 mm; the length of the rear clamping arm 13 is 135mm, and the width of the rear clamping arm is 35 mm; the thickness is 25 mm.