CN210703690U

CN210703690U - Self-locking clamp

Info

Publication number: CN210703690U
Application number: CN201921360411.6U
Authority: CN
Inventors: 孙景南; 吴斌; 王霞; 薛淑胜; 伍云翔; 郭有东
Original assignee: CRRC Nanjing Puzhen Co Ltd
Current assignee: CRRC Nanjing Puzhen Co Ltd
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2020-06-09
Anticipated expiration: 2029-08-21

Abstract

The utility model provides a self-locking clamp, which comprises a fixed table top, a lower pressure arm and a lower pressure rod which are vertically connected; one end of the lower pressure arm is hinged on the fixed table top through a first hinge shaft parallel to the fixed table top; a rotary operating rod is further arranged between the first articulated shaft of the lower pressure arm and the lower pressure rod, and two ends of the rotary operating rod are respectively positioned at the upper side and the lower side of the lower pressure arm; the lower end of the rotary operating rod is hinged on the fixed table top through a second hinged shaft; a connecting rod is also arranged between the rotary operating rod and the lower pressure arm; one end of the connecting rod is hinged to the lower pressure arm through a third hinge shaft, and the other end of the connecting rod is hinged to the upper end of the rotary operating rod through a fourth hinge shaft. When the self-locking mechanism is used, the workpiece is pressed tightly, then an upward reaction force is applied to the downward pressing rod, so that the reaction force of the clamped workpiece acts on the rotary operating rod, the downward pressing arm and the connecting rod, the formed force arm is 0, the whole mechanism forms a dead point, and self-locking is realized.

Description

Self-locking clamp

Technical Field

The utility model belongs to the anchor clamps field especially relates to a self-locking anchor clamps.

Background

The clamp is a technological device used for quickly fastening a workpiece during processing so as to keep a machine tool, a cutter and the workpiece at correct relative positions.

The traditional clamp is low in assembling and positioning precision and needs to be clamped in a thread rotating mode and the like, so that manual operation with high intensity is needed, time and labor are wasted, the working efficiency is reduced, and the labor intensity of workers is increased; and one clamp is suitable for the size and the shape of a workpiece in a small range, and the universality is poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a self-locking clamp, which can rapidly self-lock a workpiece, automatically position the workpiece and has high use efficiency; the device is suitable for workpieces with various shapes and sizes and has strong universality.

The technical scheme is as follows: the utility model provides a self-locking clamp, which comprises a fixed table top, a lower pressure arm and a lower pressure rod which are vertically connected; one end of the lower pressure arm is hinged on the fixed table top through a first hinge shaft parallel to the fixed table top, and the lower pressure rod is positioned on the rotating plane of the lower pressure arm; when the lower pressure rod rotates to be vertical to the fixed table top, the lower pressure rod is connected with a workpiece placed on the fixed table top; a rotary operating rod is further arranged between the first articulated shaft of the lower pressure arm and the lower pressure rod, and two ends of the rotary operating rod are respectively positioned at the upper side and the lower side of the lower pressure arm; the lower end of the rotary operating rod is hinged on the fixed table top through a second hinged shaft, and the second hinged shaft is parallel to the first hinged shaft; a connecting rod is also arranged between the rotary operating rod and the lower pressure arm; one end of the connecting rod is hinged to the lower pressure arm through a third hinge shaft, the other end of the connecting rod is hinged to the upper end of the rotary operating rod through a fourth hinge shaft, and the second hinge shaft, the third hinge shaft and the fourth hinge shaft are parallel; when the lower pressing rod is vertical to the fixed table surface, the second hinge shaft, the third hinge shaft and the fourth hinge shaft are positioned on the same plane parallel to the lower pressing rod.

Furthermore, a limiting lug is fixed on the connecting rod; the limiting lug is positioned between the connecting rod and the lower pressing rod; when the lower pressing rod is perpendicular to the fixed table surface, the lower surface of the limiting lug is connected with the upper surface of the lower pressing rod.

Furthermore, a positioning clamping groove component for positioning the workpiece is further arranged on the fixed table top.

Further, the positioning clamping groove component is a V-shaped groove; when the lower pressing rod rotates to be perpendicular to the fixed table top, the lower pressing rod and the bottom edge of the positioning clamping groove assembly are located on the same plane.

Furthermore, a first sliding groove is also formed in the fixed table top; the bottom of the positioning clamping groove component is embedded in the first sliding groove in a sliding mode.

Furthermore, the fixed table top is also provided with a mounting seat; the second hinge shaft and the first hinge shaft are arranged on the mounting seat; the fixed table top is also provided with a second sliding chute parallel to the first sliding chute; the mounting base bottom is provided with the first slider of slidable embedding second spout.

Furthermore, an adjusting seat is arranged between the mounting seat and the fixed table-board; a third sliding groove which is parallel to the second sliding groove and has the same shape with the second sliding groove is arranged on the upper side of the adjusting seat; the bottom of adjusting the seat is provided with the second slider of slidable embedding second spout.

Further, the second sliding groove and the third sliding groove are mortises; the first sliding block and the second sliding block are tenons.

Furthermore, a through groove is formed in the lower pressure arm; the lower pressure rod comprises a threaded rod which vertically penetrates through the through groove and can slide along the through groove, and positioning nuts which are screwed at two ends of the threaded rod; and the positioning nuts are clamped on the outer end faces of two sides of the through groove.

Has the advantages that: the utility model discloses a work piece is compressed tightly and is exerted ascending reaction force to pushing down the depression bar, and second articulated shaft, third articulated shaft and fourth articulated shaft are parallel and lie in the same plane that is on a parallel with the depression bar for behind the reaction force effect of the work piece of clamping acted on rotatory action bars, lower pressure arm and connecting rod, the arm of force that forms is 0, and whole mechanism forms the dead point, realizes self-locking; the rotary operating rod can be conveniently operated to reach the dead point position through the limiting lug; the utility model also realizes the rapid positioning of the workpiece by matching the positioning clamping groove component with the lower pressing rod; and the height-adjustable of lower depression bar, the utility model discloses still can two sets of combined use, two sets of self-locking anchor clamps's distance is adjustable, is applicable to the work piece of multiple shape and size, and the commonality is strong.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the connecting rod after the rotating operating rod is disassembled;

fig. 3 is a schematic diagram of an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

The utility model provides a self-locking clamp, including fixed table surface 1 to and perpendicular lower pressure arm 2 and the lower depression bar 3 of connecting.

One end of the lower pressure arm 2 is hinged on the fixed table top 1 through a first hinge shaft 4 parallel to the fixed table top 1, and the lower pressure rod 3 is positioned on the rotating plane of the lower pressure arm 2; when the lower pressure rod 3 rotates to be vertical to the fixed table top 1, the lower pressure rod 3 is connected with a workpiece placed on the fixed table top 1. In this embodiment, the lower pressure arm 2 is provided with a through groove 201; the lower pressure lever 3 comprises a threaded rod 301 which vertically penetrates through the through groove 201 and can slide along the through groove 201, and positioning nuts 302 which are screwed at two ends of the threaded rod 301; the positioning nuts 302 are clamped on the outer end faces of two sides of the through groove 201. The lower pressure rod 3 can slide along the through groove 201 to adjust the position according to the distance between the workpiece and the first articulated shaft 4; according to the height of the workpiece, the height of the lower end of the lower pressing rod 3 is adjusted by adjusting the position of the positioning nut 302 on the threaded rod 301, so that the lower pressing rod 3 can apply force to the workpiece fully. The lower end of the lower pressing rod 3 is provided with a rubber contact block 303, so that the lower pressing rod 3 can apply force to a workpiece fully. In order to enable the positioning nuts 302 to be clamped on the outer end faces of two sides of the through groove 201, pressing plates 304 sleeved on the threaded rod 301 are arranged on the opposite inner sides of the two positioning nuts 302, and the width of each pressing plate 304 is larger than that of the through groove 201.

A rotary operating rod 5 is further arranged between the first articulated shaft 4 of the lower pressure arm 2 and the lower pressure rod 3, and two ends of the rotary operating rod 5 are respectively positioned at the upper side and the lower side of the lower pressure arm 2; the lower end of the rotary operating rod 5 is hinged on the fixed table board 1 through a second hinged shaft 6, and the second hinged shaft 6 is parallel to the first hinged shaft 4.

A connecting rod 7 is also arranged between the rotary operating rod 5 and the lower pressure arm 2; one end of the connecting rod 7 is hinged to the lower pressure arm 2 through a third hinged shaft 8, the other end of the connecting rod 7 is hinged to the upper end of the rotary operating rod 5 through a fourth hinged shaft 9, and the second hinged shaft 6, the third hinged shaft 8 and the fourth hinged shaft 9 are parallel.

When the lower pressing rod 3 is perpendicular to the fixed table top 1, the second hinge shaft 6, the third hinge shaft 8 and the fourth hinge shaft 9 are positioned on the same plane parallel to the lower pressing rod 3. After the workpiece is pressed, an upward acting force is applied to the lower pressure rod 3, the lower pressure rod 3 applies an upward acting force to the lower pressure arm 2, and the lower pressure arm 2 applies an upward acting force to the connecting rod 7 through the third hinge shaft 8; because the fourth hinged shaft 9 is positioned in the stress direction of the connecting rod 7, the connecting rod 7 cannot rotate around the fourth hinged shaft 9; the connecting rod 7 applies an upward acting force to the rotating operation lever 5 through the fourth hinge shaft 9; because the second hinge shaft 6 is positioned in the force-bearing direction of the rotary operating rod 5, the rotary operating rod 5 cannot rotate around the fourth second hinge shaft 6; eventually the lower pressure arm 2 cannot rotate about the first articulated shaft 4 under the upward force exerted by the lower pressure bar 3. Therefore, when the mechanism is operated, the rotary operating rod 5 only needs to be rotated to a state vertical to the fixed table board 1, the reaction force of the clamped workpiece acts on the rotary operating rod 5, the lower pressure arm 2 and the connecting rod 7, the formed force arms are all 0, the whole mechanism is positioned at a dead point position, and the action cannot be generated due to the reaction force of the clamped workpiece.

In order to facilitate the rotation of the rotating operation rod 5 to a state perpendicular to the fixed table top 1, a limit bump 701 is fixed on the connecting rod 7; the limit projection 701 is located between the connecting rod 7 and the lower pressing rod 3. When the lower pressing rod 3 is perpendicular to the fixed table top 1, the lower surface of the limiting bump 701 is connected with the upper surface of the lower pressing rod 3, and at the moment, the connecting rod 7 cannot continue to rotate towards one side of the lower pressing rod 3 along the third hinge shaft 8; and because the connecting rod 7 is connected with the upper end of the rotary operating rod 5 through the fourth articulated shaft 9, when the rotary operating rod 5 rotates to be perpendicular to the fixed table board 1, the rotary operating rod 5 cannot continue to rotate towards one side of the lower pressure rod 3 along the second articulated shaft 6, so that the operation is simpler and more convenient.

And a positioning clamping groove assembly 10 for positioning the workpiece is further arranged on the fixed table top 1.

In this embodiment, the positioning slot assembly 10 is a V-shaped slot; when the lower pressing rod 3 rotates to be perpendicular to the fixed table top 1, the lower pressing rod 3 and the bottom edge of the positioning clamping groove assembly 10 are located on the same plane. The V-shaped groove is particularly suitable for workpieces in the shape of round tubes.

The fixed table top 1 is also provided with a first chute 101; the bottom of the positioning card slot assembly 10 is slidably embedded in the first sliding groove 101.

The fixed table top 1 is also provided with a mounting seat 11; the second articulated shaft 6 and the first articulated shaft 4 are arranged on the mounting seat 11; the fixed table top 1 is also provided with a second sliding chute 102 parallel to the first sliding chute 101; the bottom of the mounting seat 11 is provided with a first sliding block 103 which can be slidably embedded into the second sliding groove 102.

The positioning slot assembly 10 and the mounting seat 11 are slidable, so that the present embodiment is suitable for clamping workpieces with different lengths.

An adjusting seat 12 is also arranged between the mounting seat 11 and the fixed table top 1; a third sliding groove which is parallel to the second sliding groove 102 and has the same shape as the second sliding groove 102 is arranged on the upper side of the adjusting seat 12; the bottom of the adjusting seat 12 is provided with a second sliding block which can be slidably embedded into the second sliding groove 102. The height of the adjusting seat 12 is adjusted, so that the present embodiment is suitable for clamping workpieces with different heights.

In this embodiment, the second sliding groove 102 and the third sliding groove are mortises; the first sliding block 103 and the second sliding block are tenons, and the structure is firm in connection and convenient to disassemble and assemble.

When the device is used, a workpiece is placed on the positioning slot assembly 10, force is applied from the upper end of the rotary operating rod 5 to enable the rotary operating rod 5 to rotate towards one side where the downward pressing rod 3 is located, and when the rotary operating rod 5 is perpendicular to the fixed table board 1, the limiting lug 701 limits the rotary operating rod 5 to continue rotating; then, according to the height of the workpiece, the height of the lower end of the lower pressing rod 3 is adjusted by adjusting the position of the positioning nut 302 on the threaded rod 301 until the lower pressing rod 3 fully applies force to the workpiece, so that clamping is realized; after the reaction force of the clamped workpiece acts on the rotary operating rod 5, the lower pressure arm 2 and the connecting rod 7, the formed force arms are all 0, and the whole mechanism is positioned at a dead point position and cannot act due to the reaction force of the workpiece. When the workpiece is to be removed, the upper end of the swing lever 5 is simply urged to swing the swing lever 5 toward the first hinge shaft 4.

The utility model discloses a self-locking anchor clamps can concatenate the use by two sets, are particularly useful for the pipe welding. When the self-locking clamp is used, two circular pipes to be welded are respectively placed in the positioning clamping groove assemblies 10 which are positioned on the same straight line of the two sets of self-locking clamps, and the assembly welding gap of the two circular pipes is adjusted according to actual welding requirements; then the two sets of self-locking clamps respectively compress the round pipes to perform positioning spot welding on the round pipes. According to the length of pipe, the relative position of two adjustable mount pads 11, positioning slot subassembly 10 guarantees the straightness accuracy, the axiality of two pipes to guarantee that pipe equipment point is fixed and accomplish the back welding gap reasonable and even.

Claims

1. A self-locking clamp is characterized in that: comprises a fixed table top (1), and a lower pressure arm (2) and a lower pressure rod (3) which are vertically connected; one end of the lower pressure arm (2) is hinged on the fixed table top (1) through a first hinged shaft (4) parallel to the fixed table top (1), and the lower pressure rod (3) is positioned on the rotating plane of the lower pressure arm (2); when the lower pressing rod (3) rotates to be vertical to the fixed table top (1), the lower pressing rod (3) is connected with a workpiece placed on the fixed table top (1); a rotary operating rod (5) is further arranged between the first articulated shaft (4) of the lower pressure arm (2) and the lower pressure rod (3), and two ends of the rotary operating rod (5) are respectively positioned at the upper side and the lower side of the lower pressure arm (2); the lower end of the rotary operating rod (5) is hinged on the fixed table top (1) through a second hinged shaft (6), and the second hinged shaft (6) is parallel to the first hinged shaft (4); a connecting rod (7) is also arranged between the rotary operating rod (5) and the lower pressure arm (2); one end of the connecting rod (7) is hinged to the lower pressure arm (2) through a third hinged shaft (8), the other end of the connecting rod (7) is hinged to the upper end of the rotary operating rod (5) through a fourth hinged shaft (9), and the second hinged shaft (6), the third hinged shaft (8) and the fourth hinged shaft (9) are parallel; when the lower pressing rod (3) is perpendicular to the fixed table top (1), the second hinge shaft (6), the third hinge shaft (8) and the fourth hinge shaft (9) are positioned on the same plane parallel to the lower pressing rod (3).

2. The self-locking clip of claim 1, wherein: a limiting lug (701) is fixed on the connecting rod (7); the limiting lug (701) is positioned between the connecting rod (7) and the lower pressing rod (3); when the lower pressing rod (3) is perpendicular to the fixed table top (1), the lower surface of the limiting bump (701) is connected with the upper surface of the lower pressing rod (3).

3. A self-locking clip according to claim 1 or 2, wherein: and the fixed table top (1) is also provided with a positioning clamping groove component (10) for positioning a workpiece.

4. A self-locking clip as recited in claim 3, wherein: the positioning clamping groove assembly (10) is a V-shaped groove; when the lower pressing rod (3) rotates to be perpendicular to the fixed table top (1), the lower pressing rod (3) and the bottom edge of the positioning clamping groove assembly (10) are located on the same plane.

5. The self-locking clip of claim 4, wherein: the fixed table top (1) is also provided with a first sliding chute (101); the bottom of the positioning clamping groove component (10) is embedded in the first sliding groove (101) in a sliding mode.

6. The self-locking clip of claim 5, wherein: the fixed table top (1) is also provided with a mounting seat (11); the second articulated shaft (6) and the first articulated shaft (4) are arranged on the mounting seat (11); a second sliding chute (102) parallel to the first sliding chute (101) is also arranged on the fixed table top (1); the bottom of the mounting seat (11) is provided with a first sliding block (103) which can be embedded into the second sliding groove (102) in a sliding manner.

7. The self-locking clip of claim 6, wherein: an adjusting seat (12) is also arranged between the mounting seat (11) and the fixed table top (1); a third sliding groove which is parallel to the second sliding groove (102) and has the same shape with the second sliding groove (102) is arranged on the upper side of the adjusting seat (12); the bottom of the adjusting seat (12) is provided with a second sliding block which can be embedded into a second sliding groove (102) in a sliding manner.

8. The self-locking clip of claim 7, wherein: the second sliding groove (102) and the third sliding groove are mortises; the first sliding block (103) and the second sliding block are tenons.

9. The self-locking clip of claim 1, wherein: a through groove (201) is formed in the lower pressure arm (2); the lower pressing rod (3) comprises a threaded rod (301) which vertically penetrates through the through groove (201) and can slide along the through groove (201), and positioning nuts (302) which are screwed at two ends of the threaded rod (301); the positioning nuts (302) are clamped on the outer end faces of the two sides of the through groove (201).