A long strip hydraulic clamp and working structure

Abstract

The utility model discloses a long strip type hydraulic clamp and working structure relates to hydraulic clamp technical field, including clamping strip, it is "L" type strip shape, the clamping hole is seted up on clamping strip, the position strip is seted up on the position strip and is equipped with fixed screw in the positioning hole, and fixed screw is used for connecting position strip and clamping strip, hydraulic oil pipe subassembly, including long strip pipe, is equipped with end one and end two respectively in the both ends of long strip pipe, is equipped with hydraulic plug on end one, is equipped with exhaust valve on end two, the pipe material of long strip pipe is elastic material, clamping pin, clamping pin arranges multiple groups and sets up in parallel with long strip pipe, and the end diameter of clamping pin is not greater than the inner diameter of clamping hole, elastic reset piece, the elastic reset piece is installed between clamping pin and clamping strip, to solve the technical problem of difficult clamping and small stroke output action of workpiece of different length in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic clamping technology, specifically to a long strip hydraulic clamp and its working structure. Background Technology

[0002] Hydraulic fixtures are fixtures that use hydraulic components to replace mechanical parts and achieve automatic positioning, support and clamping of workpieces through hydraulic control.

[0003] Reference CN202323643496.8 A versatile hydraulic clamp uses a variety of interlocking clamping components, which can adjust the clamping height according to the height of the workpiece, effectively ensuring the stability of the workpiece during processing without affecting the workpiece processing. At the same time, the clamping surface can be flexibly adjusted according to the shape of the workpiece, thus enabling the clamping of flat and curved workpieces.

[0004] In essence, the reference uses a hydraulically driven device to move the modular clamping components laterally, thereby clamping them onto the workpiece using a fixture.

[0005] First, the stroke of the existing smallest hydraulic cylinder is approximately 50mm. When a smaller stroke is required, the oil supply to the cylinder needs to be strictly controlled, which places extremely high demands on the oil pipe circuit. Second, the references are suitable for clamping a single workpiece. When multiple workpieces of different lengths are present, some products can only be clamped locally; or when multiple workpieces need to be clamped, it is difficult to achieve directional multiple clamping.

[0006] To address these issues, we provide a long, cylindrical hydraulic clamp and its working structure. Utility Model Content

[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a long strip hydraulic clamp and working structure to solve the technical problems of difficulty in clamping workpieces of different lengths and small stroke output action in the existing technology.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0009] A long, narrow hydraulic clamp, comprising:

[0010] The clamping bar is L-shaped and has clamping holes.

[0011] A position bar, wherein a positioning hole is provided on the position bar and a fixing screw is installed in the positioning hole. The fixing screw is used to connect the position bar and the clamping bar.

[0012] The hydraulic hose assembly includes a long tube with end one and end two installed at both ends. A hydraulic plug is installed on end one, and an air vent valve is installed on end two. The long tube is made of an elastic material.

[0013] Clamping pins, multiple sets of clamping pins are arranged parallel to the long tube, and the end diameter of the clamping pins is not greater than the inner diameter of the clamping hole;

[0014] An elastic reset element is installed between the clamping pin and the clamping bar.

[0015] In a further technical solution, the clamping pin includes a mounting plate and an end post, which are integrally connected; the mounting plate is C-shaped and the opening faces the long tube;

[0016] The diameter of the end post is smaller than the height of the mounting plate; the end post is located on the side of the mounting plate facing the clamping hole.

[0017] In a further technical solution, the clamping bar is bent downwards, and an elastic reset element is provided between the bottom and the mounting plate;

[0018] The elastic reset component includes an elastic body and a reset spring. The elastic body is elongated and fixedly installed at the bottom of the clamping bar. One end of the reset spring is fixedly connected to the clamping bar, and the other end is fixedly connected to the mounting plate.

[0019] In a further technical solution, the elastic body has mounting openings at both ends, and the return spring is installed through the mounting openings.

[0020] In a further technical solution, the length of the multiple sets of clamping pins is no greater than the length of the long tube and less than the length of the clamping strip; the length of the clamping strip and the hydraulic oil pipe assembly are roughly equivalent. The position strip is slightly shorter than the hydraulic oil pipe assembly.

[0021] In a further technical solution, a transport auxiliary angle plate is also included. A transport handle is detachably installed on one side of the transport auxiliary angle plate, and an installation hole is opened on the same side. An auxiliary screw is installed in the installation hole and the transport auxiliary angle plate and the position strip are fixedly connected.

[0022] A working structure for a long strip hydraulic clamp includes a base, which is shaped like a "C" and has an opening slot; the position strip abuts against one side of the inner wall of the opening of the base.

[0023] When the long tube is filled with hydraulic oil, the end of the end post extends out of the long tube and clamps into the bottom side wall of the mold.

[0024] The width of the mold bottom is no greater than the distance between the clamping bar and the inner wall of the opening groove away from the position bar.

[0025] In a further technical solution, the base has a side hole on its side and a bottom hole at its bottom; a side bolt is installed in the side hole to connect the base and the position bar; a bottom bolt is installed in the bottom hole, with the bottom bolt facing upwards to connect the position bar and the base.

[0026] In this application, the workpiece is replaced with a mold, which is used on CNC machine tools such as bending machines to fix a fixture for processing the workpiece.

[0027] Compared with existing technologies, it has the following advantages:

[0028] This invention utilizes a long, cylindrical hydraulic clamp to achieve clamping of molds at multiple locations and clamping of multiple molds. The clamp incorporates specially designed hydraulic hoses; when supplied with pressure oil within permissible limits, the hoses expand, pushing hardened clamping pins. Within a few seconds, all molds are clamped, and the long, cylindrical structure provides a stable output effect.

[0029] This invention, by installing a transport auxiliary angle plate, ensures the coaxiality of the long hydraulic clamp during transportation, preventing damage. It also facilitates transportation and protects the clamping bars.

[0030] The working structure designed in this utility model ensures the installation, positioning, and confirmation of the long hydraulic clamp, achieving stability and certainty in operation. Attached Figure Description

[0031] Figure 1 This is an exploded view of the long strip hydraulic clamp of this utility model;

[0032] Figure 2 This is a schematic diagram of the hydraulic oil pipe assembly of this utility model;

[0033] Figure 3 This is a schematic diagram of the clamping pin of this utility model;

[0034] Figure 4 This is a schematic diagram of the working structure of the spring reset component of this utility model;

[0035] Figure 5 for Figure 1 Enlarged view of part A;

[0036] Figure 6 This is a schematic diagram of the long strip hydraulic clamp structure of this utility model;

[0037] Figure 7 This is an exploded view of the long strip hydraulic clamp containing a transport auxiliary angle plate according to the present invention.

[0038] Figure 8This is a schematic diagram of the long strip hydraulic clamp structure containing a transport auxiliary angle plate according to the present invention.

[0039] Figure 9 A schematic diagram of the structure of the long strip hydraulic clamp installed inside the base of this utility model. Figure 1 ;

[0040] Figure 10 A schematic diagram of the structure of the long strip hydraulic clamp installed inside the base of this utility model. Figure 2 ;

[0041] Figure 11 Cross-sectional view of the mold and long hydraulic clamp installed inside the base;

[0042] Figure 12 A top view of the mold and long hydraulic clamp installed in the base.

[0043] In the picture:

[0044] 1. Clamping bar; 11. Clamping hole;

[0045] 2. Positioning strip; 21. Fixing screw;

[0046] 3. Hydraulic hose assembly; 31. Long tube; 32. End 1; 33. End 2; 34. Hydraulic plug; 35. Air vent valve;

[0047] 4. Clamping pin; 41. Mounting plate; 42. End post;

[0048] 5. Elastic reset element; 51. Elastic body; 52. Reset spring; 53. Installation port;

[0049] 6. Transport auxiliary angle plate; 61. Transport handle; 62. Mounting hole; 63. Auxiliary screw;

[0050] 7. Base; 71. Opening slot; 72. Side hole; 73. Bottom hole; 74. Side bolt; 75. Bottom bolt;

[0051] 8. Molds. Detailed Implementation

[0052] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0053] Example 1

[0054] Please see Figure 1-6This utility model provides a technical solution: a long strip hydraulic clamp, comprising: as shown in the figure. Figure 1 As shown:

[0055] The clamping bar 1 is L-shaped; the clamping bar 1 has clamping holes 11.

[0056] Positioning strip 2, with positioning holes provided on it, and fixing screws 21 installed in the positioning holes, the fixing screws 21 being used to connect the positioning strip 2 and the clamping strip 1; positioning holes are provided on the sides of the positioning strip and the bottom of the clamping strip;

[0057] refer to Figure 2 and Figure 1 The hydraulic oil pipe assembly 3 includes a long strip pipe 31, with end cap 32 and end cap 33 installed at both ends of the long strip pipe 31 respectively. A hydraulic plug 34 is installed on end cap 32, and an exhaust valve 35 is installed on end cap 33. The long strip pipe 31 is made of an elastic material.

[0058] Clamping pin 4, multiple sets of clamping pin 4 are arranged parallel to the long strip tube 31, and the end diameter of clamping pin 4 is not greater than the inner diameter of clamping hole 11;

[0059] The elastic reset element 5 is installed between the clamping pin 4 and the clamping bar 1.

[0060] like Figure 3 As shown, the clamping pin 4 includes a mounting plate 41 and an end post 42, which are integrally connected. The mounting plate 41 is C-shaped and its opening faces the long tube 31. The diameter of the end post 42 is smaller than the height of the mounting plate 41 and not greater than the inner diameter of the clamping hole 11. The end post 42 is located on the side of the mounting plate 41 facing the clamping hole 11.

[0061] The clamping bar 1 is bent downwards, and an elastic reset element 5 is provided between its bottom and the mounting plate 41;

[0062] like Figure 4 As shown, the elastic reset component 5 includes an elastic body 51 and a reset spring 52. The elastic body 51 is elongated and fixedly installed at the bottom of the clamping bar 1. One end of the reset spring 52 is fixedly connected to the clamping bar 1, and the other end is fixedly connected to the mounting plate 41. The elastic body 51 has mounting openings 53 at both ends, such as... Figure 5 As shown; the reset spring 52 is installed through the mounting opening 53 to ensure the position of the clamping bar relative to the position bar, and can be quickly reset.

[0063] The length of the multiple sets of clamping pins 4 is no greater than the length of the long tube 31 and less than the length of the clamping bar 1; the lengths of the clamping bar 1 and the hydraulic oil pipe assembly 3 are approximately equal. The clamping pins, being shorter than the long tube, can be concentrated in the middle of the long tube. (See reference for long-tube hydraulic clamp.) Figure 6 structure.

[0064] This invention utilizes a long, cylindrical hydraulic clamp to achieve multi-position clamping of molds and clamping of multiple molds. The maximum permissible pressure of the hydraulic oil required by the clamp is 50 bar, with a recommended working pressure range of 35–45 bar. The clamp incorporates specially designed hydraulic hoses; when supplied with hydraulic oil within the permissible pressure range, the hoses expand, pushing the hardened clamping pins, and within a few seconds, all molds are clamped. The hydraulic hoses can be made of low-strength rubber hoses with few layers of steel wire braiding or spiral reinforcement, such as SAE 100R1AT or SAE 100R2AT.

[0065] This invention utilizes the expansion of the pipe as a stroke driver to achieve short-stroke propulsion; and the propulsion of the long strip structure provides a stable output effect.

[0066] Example 2

[0067] like Figure 7 and 8 As shown, another embodiment of this utility model is included. Based on embodiment 1, in order to facilitate the transportation of the long strip hydraulic clamp, a transportation auxiliary angle plate 6 is also included. A transportation handle 61 is detachably installed on one side of the transportation auxiliary angle plate 6, and a mounting hole 62 is opened on the same side. An auxiliary screw 63 is installed in the mounting hole 62 and fixedly connects the transportation auxiliary angle plate 6 and the position strip 2. The auxiliary screw is made of aluminum.

[0068] The clamping strip of this product is 510mm in length per section. For multi-section clamping strips, the ends need to be welded to extend them.

[0069] This embodiment ensures the coaxiality of the long hydraulic clamp during transportation by installing a transport auxiliary angle plate, preventing damage. It also facilitates transportation and protects the clamping bars.

[0070] Example 3

[0071] like Figure 9-12 As shown, another embodiment of this utility model is provided. Based on embodiment 1, a working structure of a long strip hydraulic clamp includes a base 7, which is shaped like a "C" and has an opening slot 71; the position strip 2 abuts against one side of the inner wall of the opening of the base 7.

[0072] When the long tube 31 is filled with hydraulic oil, the end post 42 extends from the end away from the long tube 31 to form a clamping hole 11, which abuts against the bottom side wall of the mold 8.

[0073] The bottom width of mold 8 is no greater than the distance between the inner walls of the clamping bar 1 and the opening slot 71 away from the position bar 2. Mold bottom width reference. Figure 11 In the horizontal direction, the bottom width of the mold must be less than the horizontal dimension of the opening slot for it to be inserted into the opening slot. When the long strip hydraulic clamp is installed and fitted against one side of the inner wall of the opening slot, the bottom width of the mold must not be greater than the distance from the clamping bar to the remaining inner wall of the opening slot.

[0074] like Figure 10 As shown, the base 7 has a side hole 72 on its side and a bottom hole 73 at its bottom; a side bolt 74 is installed in the side hole 72 to connect the base 7 and the position strip 2; a bottom bolt 75 is installed in the bottom hole 73, and the bottom bolt 75 is used to connect the position strip 2 and the base 7.

[0075] The fixture can be integrated into a custom-made base or into a compensation worktable. In this embodiment, it is installed on the base.

[0076] Molds ≥ 15 mm in length can be automatically clamped anywhere with clamping pins. Molds < 15 mm in length need to be placed directly opposite the clamping pins to be automatically clamped. There is an area of ​​approximately 40 mm at both ends of the clamp without clamping pins. Placing molds less than 40 mm in length in this area may result in failure to clamp properly; please avoid this area during use.

[0077] The fixture body is made of high-strength CrMo alloy steel, and the hardness of the fixture body is ≥HRC 28.

[0078] Installation steps:

[0079] 1) When the fixture is delivered, it is placed in a wooden box. At the same time, the two sets of transport handles are lifted to move the fixture horizontally out and place it in the base.

[0080] 2) Remove the auxiliary screws and remove the transport auxiliary angle plate from the clamping plate;

[0081] 3) After removing the transport auxiliary angle plate, the clamp will become vulnerable and needs to be flipped simultaneously in the left, center and right positions;

[0082] 4) Simultaneously push the clamping bars in the left, middle, and right positions to make the position bars close to the base;

[0083] 5) Manually tighten the side bolts, with a pre-tightening torque of 2-3 Nm;

[0084] 6) Manually tighten the bottom bolts, with a pre-tightening torque of 2-3 Nm;

[0085] 7) First tighten the side bolts to a torque of 10±1Nm, then tighten the bottom bolts to a torque of 10±1Nm.

[0086] 8) Connecting the hydraulic system: Before using the fixture, it is necessary to connect the hydraulic power system, which includes a hydraulic pump station with a working pressure range of 35 to 45 bar.

[0087] a. Connect the oil inlet: One side of the clamp is the oil inlet, and the other side is the vent; remove the hydraulic plug that comes with the clamp, and install the hydraulic connector and piping as per the reference. Figure 12 The left end shown has a tightening torque of 10±1 Nm;

[0088] b. Bleeding Operation: Check the bleed valve to ensure it is tightened. Pour oil into the clamp. Place an external hex wrench on the bleed valve, insert the bleed hose (a clean container can be attached to the other end of the hose for reuse of clean hydraulic oil). Slowly loosen the bleed valve until hydraulic oil flows out in streams without noticeable air bubbles. Then tighten the bleed valve to a torque of 5±1 Nm. The bleeding operation is now complete.

[0089] 9) Before using the fixture, check and ensure that the working surfaces of the fixture and mold are clean and undamaged. With the hydraulic system off and all clamping pins retracted, the mold can be inserted into the fixture slot vertically. Restart the hydraulic system, at which point all clamping pins will extend and clamp the mold, after which bending operations can be performed.

[0090] After shutting down the hydraulic system, wait until the clamping pins retract completely. At this point, the clamp is in an open state, and the mold can be removed vertically.

[0091] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A long strip-type hydraulic clamp, characterized in that, include: The clamping bar (1) is in the shape of an "L"; the clamping bar (1) has a clamping hole (11); Position bar (2), the position bar (2) has a positioning hole, and a fixing screw (21) is installed in the positioning hole. The fixing screw (21) is used to connect the position bar (2) and the clamping bar (1). The hydraulic hose assembly (3) includes a long tube (31), with end cap 1 (32) and end cap 2 (33) installed at both ends of the long tube (31). A hydraulic plug (34) is installed on end cap 1 (32), and an exhaust valve (35) is installed on end cap 2 (33). The tube material of the long tube (31) is elastic. Clamping pins (4) are arranged in multiple groups and are set parallel to the long strip tube (31). The end diameter of the clamping pins (4) is not greater than the inner diameter of the clamping hole (11). An elastic reset element (5) is installed between the clamping pin (4) and the clamping bar (1).

2. The elongated hydraulic clamp according to claim 1, characterized in that, The clamping pin (4) includes a mounting plate (41) and an end post (42), which are integrally connected; the mounting plate (41) is C-shaped and the opening faces the long tube (31). The diameter of the end post (42) is smaller than the height of the mounting plate (41); the end post (42) is located on the side of the mounting plate (41) facing the clamping hole (11).

3. A long strip hydraulic clamp according to claim 2, characterized in that, The clamping bar (1) is bent downwards, and an elastic reset member (5) is provided between the bottom and the mounting plate (41). The elastic reset component (5) includes an elastic body (51) and a reset spring (52). The elastic body (51) is long and is fixedly installed at the bottom of the clamping bar (1). One end of the reset spring (52) is fixedly connected to the clamping bar (1), and the other end is fixedly connected to the mounting plate (41).

4. A long strip hydraulic clamp according to claim 3, characterized in that, The elastic body (51) has mounting holes (53) at both ends, and the return spring (52) is installed through the mounting holes (53).

5. A long strip hydraulic clamp according to claim 4, characterized in that, The length of the multiple clamping pins (4) is no greater than the length of the long tube (31) and less than the length of the clamping strip (1).

6. A long strip hydraulic clamp according to claim 4, characterized in that, It also includes a transport auxiliary corner plate (6), on one side of which a transport handle (61) is detachably installed, and on the same side, a mounting hole (62) is provided; an auxiliary screw (63) is installed in the mounting hole (62) and the transport auxiliary corner plate (6) and the position strip (2) are fixedly connected.

7. A working structure for a long strip-type hydraulic clamp, characterized in that, The long strip hydraulic clamp as described in claim 5 also includes a base (7), which is shaped like a "C" and has an opening slot (71); the position strip (2) abuts against one side of the inner wall of the opening of the base (7); When the long tube (31) is filled with hydraulic oil, the end of the end post (42) away from the long tube (31) extends out a clamping hole (11) and abuts against the bottom side wall of the mold (8); The bottom width of the mold (8) is not greater than the distance between the inner wall of the clamping bar (1) and the opening groove (71) away from the position bar (2).

8. The working structure of a long strip hydraulic clamp according to claim 7, characterized in that, The base (7) has a side hole (72) on the side and a bottom hole (73) at the bottom. A side bolt (74) is installed in the side hole (72) to connect the base (7) and the position bar (2). A bottom bolt (75) is installed in the bottom hole (73), and the bottom bolt (75) faces upward to connect the position bar (2) and the base (7).

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