A movable clamp

Abstract

The utility model relates to a movable clamp, which includes a mounting table, a clamping cylinder and a fixed clamping plate arranged on the mounting table, a movable clamping plate arranged on the piston rod of the clamping cylinder, and a pair of limit grooves respectively opened on the fixed clamping plate and the movable clamping plate, wherein the pair of limit grooves are respectively arranged relative to the two sides of the workpiece overlap portion, and further includes a positioning top plate arranged on the fixed clamping plate, a low-side mechanism arranged on the movable clamping plate, and a side positioning block arranged at the movable end of the low-side mechanism, wherein the bottom surface of the positioning top plate is arranged relative to the top surface of the workpiece overlap portion, and the moving path of the side positioning block passes through the side surface of the workpiece overlap portion on the pair of limit grooves. The utility model limits the workpiece overlap portion in two directions perpendicular to the axis of the workpiece overlap portion by positioning the top plate and the side positioning block with adjustable position, and is clamped and fixed by the fixed clamping plate and the movable clamping plate with limit grooves, thereby preventing the two overlap ends of the workpiece from easily jumping and dislocating during the clamping process, and has the advantage of ensuring the subsequent welding quality.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a movable clamp. Background Art

[0002] Stirrups are used to meet the shear strength of the inclined section and connect the main force-bearing reinforcement and the steel bars of the mixed reinforcement skeleton in the compression zone. They are divided into single-leg stirrups, open rectangular stirrups, closed rectangular stirrups, diamond stirrups, polygonal stirrups, tic-tac-toe stirrups and circular stirrups, etc. At present, when welding closed rectangular stirrups, the overlapping parts at both ends of each stirrup are completed in advance so that the axes of the two overlapping ends tend to be parallel. This requires that the stirrups need to maintain the same clamping environment during welding so that the axes of the overlapping parts of the stirrups need to be parallel to ensure the fullness of the weld and the welding quality.

[0003] A Chinese patent with authorization announcement number CN216633171U discloses a welding workbench for box girder top plate steel bars, including a mounting platform and a plurality of fixtures arranged on the mounting platform; the fixtures include a plurality of positioning seats arranged in a straight line, at least two locking seats arranged alternately with the positioning seats, clamps arranged one-to-one with the locking seats, and a clamping device arranged between two of the positioning seats and used to clamp the overlap section of the workpiece; the clamping device includes a pair of cylinder seats arranged on the mounting platform, a clamping cylinder arranged on the cylinder seat, a clamping seat arranged on the clamping cylinder and slidably connected to the cylinder seat, and a limit groove opened on the clamping seat, wherein the limit grooves on the pair of clamping seats are arranged respectively relative to the two sides of the overlap section of the workpiece.

[0004] The above-mentioned existing technical solutions have the following defects: the above-mentioned clamping device is driven by the clamping cylinders on both sides, so that the pair of limit grooves and the overlapped parts of the clamped workpieces can maintain appropriate pre-pressure, so that the two axes of the overlapped parts of the workpieces need to be parallel; because the two overlapped ends of the workpiece are only subjected to the clamping force perpendicular to the two sides of the axis, and due to the steel bar processing error of the workpiece and the working error of the clamping device, it is easy for the two overlapped ends of the workpiece to contact too tightly or too loosely, the overlapped ends to jump, and misalignment to occur, which will affect the subsequent welding quality. Utility Model Content

[0005] The problem to be solved by the utility model is to provide a movable clamp in view of the above-mentioned deficiencies existing in the prior art. By first limiting the position in two directions perpendicular to the axis of the overlapping part of the workpiece and then clamping and fixing it, it can prevent the two overlapping ends of the workpiece from easily jumping and misaligning during the clamping process, and has the advantage of ensuring the subsequent welding quality.

[0006] The above utility model object of the utility model is achieved through the following technical solutions:

[0007] A movable clamp comprises a mounting table, a clamping cylinder and a fixed clamping plate arranged on the mounting table, a movable clamping plate arranged on the piston rod of the clamping cylinder, and a pair of limit grooves respectively opened on the fixed clamping plate and the movable clamping plate, wherein the pair of limit grooves are respectively arranged relative to the two sides of the workpiece overlapping part, and further comprises a positioning top plate arranged on the fixed clamping plate, a low-side mechanism arranged on the movable clamping plate, and a side positioning block arranged at the moving end of the low-side mechanism, wherein the bottom surface of the positioning top plate is arranged relative to the top surface of the workpiece overlapping part, and the moving path of the side positioning block passes through the side surfaces of the workpiece overlapping part on the pair of limit grooves.

[0008] By adopting the above technical scheme, in the actual working process, the movable clamp can be installed on the workbench or on the movable device, and the stirrups can be clamped and fixed in a manner that the axes of the overlapping parts of the stirrups tend to be parallel and overlapped left and right. The stirrups as a whole can be installed on the workbench or the movable device in a horizontal or vertical manner according to the welding method; when installing, first adjust the position of the side positioning block relative to the movable clamping plate through the low-pair mechanism according to the steel bar diameter of the workpiece, and then complete the fixing clamp in a manner that the positioning top plate is pressed against the top surface of the two overlapping ends of the workpiece and the limiting groove of the fixed clamping plate contacts one side of the overlapping part of the workpiece. The plate and the movable clamp are pre-positioned on both sides of the overlapped part of the workpiece, and can directly prevent the two overlapped ends of the workpiece from jumping up and down, and then the movable clamp and the side positioning block are driven to move by the clamping cylinder to force the axis of the overlapped part of the stirrup to be parallel, and complete the clamping of the overlapped part of the stirrup; in this process, the positioning top plate and the side positioning block with adjustable position are limited in two directions perpendicular to the axis of the overlapped part of the workpiece, and are assisted by fixed clamps and movable clamps with limiting grooves for clamping and fixing, which can prevent the two overlapped ends of the workpiece from jumping easily and causing dislocation during the clamping process, and has the advantage of ensuring the subsequent welding quality.

[0009] The utility model is further configured as follows: it also comprises at least two slide rails which are arranged in parallel on the installation platform, and the movable clamping plate is slidably connected to these slide rails.

[0010] By adopting the above technical solution, the slide rail is used to assist the clamping cylinder, further limiting the moving direction of the movable clamping plate to achieve stable clamping of the overlapping portion of the workpiece.

[0011] The utility model is further configured as follows: the side walls of the limiting grooves are configured as inclined surfaces, so that a constriction is formed between the pair of limiting grooves.

[0012] By adopting the above technical solution, it is possible to adapt to the positioning of workpieces with different steel bar diameters.

[0013] The utility model is further configured as follows: the top wall of the limiting groove is configured as a plane and is approximately at the same height as the bottom surface of the positioning top plate.

[0014] By adopting the above technical solution, it can be used to assist in positioning the top plate, further compress the top surface of the overlapped portion of the workpiece, and prevent the two overlapped ends of the workpiece from easily jumping and misaligning during the clamping process.

[0015] The utility model is further configured as follows: grooves are respectively provided at the bottom of the fixed splint and the movable splint, the cross-section of the positioning top plate is L-shaped, the top end of the positioning top plate is fixed to the fixed splint, and the bottom end passes through the grooves of the fixed splint and the movable splint in sequence.

[0016] By adopting the above technical solution, the overall structure of the movable clamp is compact and the volume is small.

[0017] The utility model is further configured as follows: a slide groove is provided at the bottom end of the positioning top plate, and the lower auxiliary mechanism is slidably matched with the slide groove.

[0018] By adopting the above technical solution, the overall structure of the movable clamp is compact and the volume is small.

[0019] The utility model is further configured as follows: the lower pair mechanism is configured as a moving pair, a spiral pair, or a cylindrical pair.

[0020] By adopting the above technical scheme, the two components of the low-pair connection are in surface contact and can withstand larger loads. The geometric shapes of the two kinematic elements of the low-pair are simpler and easier to manufacture, and the low-pair connection is easy to achieve geometric closure. Therefore, the low-pair mechanism usually has the advantages of simple structure, easy manufacturing, reliable operation, ability to withstand larger loads, and transmission of larger power.

[0021] The utility model is further configured as follows: the low pair mechanism includes an adjustment plate arranged on the fixed clamping plate, a screw rod passing through the adjustment plate, and a nut arranged on the adjustment plate and threadedly connected to the screw rod, and the side positioning block is arranged on the screw rod.

[0022] By adopting the above technical solution, when the diameter of the steel bar of the workpiece changes, the positioning movement of the side positioning block can be completed by directly rotating the screw rod, thereby realizing the interference limitation of the side positioning block on the side of the overlapped part of the workpiece between the pair of limiting grooves.

[0023] The utility model is further configured to include a holding portion arranged on the screw rod.

[0024] By adopting the above technical solution, it is convenient for users to grasp and apply force.

[0025] The utility model is further configured as follows: it also includes a travel switch which is arranged on the mounting platform and electrically connected to the clamping cylinder, and the contact of the travel switch is arranged relative to the top surface of the overlapped portion of the workpiece.

[0026] By adopting the above technical solution, after the top surface of the overlapped portion of the workpiece contacts the contact, the travel switch can control the clamping cylinder to start, so as to complete the clamping of the workpiece by the movable clamp.

[0027] To sum up, the beneficial technical effect of the utility model is: by positioning the top plate and the side positioning blocks with adjustable position to limit the workpiece in two directions perpendicular to the axis of the overlapping part, and assisted by fixed clamps and movable clamps with limiting grooves for clamping and fixing, it can prevent the two overlapping ends of the workpiece from easily jumping and misaligning during the clamping process, which has the advantage of ensuring the subsequent welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the movable clamp of the utility model.

[0029] Figure 2 It is a schematic diagram of the connection relationship between the fixed clamping plate, the limiting groove, the groove and the positioning top plate of the utility model.

[0030] Figure 3 It is a schematic diagram of the connection relationship between the movable splint, the lower auxiliary mechanism and the side positioning block of the utility model.

[0031] In the figure, 1. mounting table; 2. clamping cylinder; 31. fixed splint; 32. movable splint; 33. limit slot; 34. groove; 4. travel switch; 5. slide rail; 6. positioning top plate; 61. slide slot; 7. low pair mechanism; 71. adjustment plate; 72. screw; 73. gripping part; 74. nut; 8. side positioning block. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0033] Reference Figure 1 and Figure 2, is a movable clamp disclosed by the utility model, comprising a mounting platform 1, a clamping cylinder 2 and a fixed clamping plate 31 arranged on the mounting platform 1, a travel switch 4 arranged on the mounting platform 1 and electrically connected to the clamping cylinder 2, a pair of slide rails 5 arranged in parallel on the mounting platform 1, a movable clamping plate 32 arranged on the piston rod of the clamping cylinder 2 and slidably connected to the pair of slide rails 5, a pair of limiting grooves 33 respectively opened on the fixed clamping plate 31 and the movable clamping plate 32, a positioning top plate 6 arranged on the fixed clamping plate 31, a low-side mechanism 7 arranged on the movable clamping plate 32, and a side positioning block 8 arranged at the moving end of the low-side mechanism 7. Among them, the pair of limiting grooves 33 are arranged respectively opposite to the two sides of the overlapped part of the workpiece, the contact of the travel switch 4 and the bottom surface of the positioning top plate 6 are arranged respectively opposite to the top surface of the overlapped part of the workpiece, and the moving path of the side positioning block 8 passes through the side surface of the overlapped part of the workpiece on the pair of limiting grooves 33.

[0034] Reference Figure 2 In order to adapt to the position limitation of workpieces with different steel bar diameters, the side walls of the position limiting grooves 33 are set as inclined surfaces, so that a constriction is formed between the pair of position limiting grooves 33. In addition, the top wall of the position limiting grooves 33 is set as a plane and is approximately at the same height as the bottom surface of the positioning top plate 6. The top wall of the position limiting grooves 33 can be used to assist in positioning the top plate 6, further pressing the top surface of the overlapped portion of the workpiece, and preventing the two overlapped ends of the workpiece from easily jumping and misaligning during the clamping process.

[0035] The bottom of the fixed clamping plate 31 and the movable clamping plate 32 are respectively provided with grooves 34, and the cross section of the positioning top plate 6 is L-shaped. The top end of the positioning top plate 6 is fixed to the fixed clamping plate 31, and the bottom end passes through the grooves 34 of the fixed clamping plate 31 and the movable clamping plate 32 in sequence. A slide groove 61 is provided at the bottom end of the positioning top plate 6, and the low auxiliary mechanism 7 is slidably matched with the slide groove 61. This structural arrangement makes the overall structure of the movable clamp compact and small in size.

[0036] Reference Figure 3 The lower pair mechanism 7 is configured as a screw pair, which includes an adjustment plate 71 disposed on the fixed clamping plate 31, a screw rod 72 passing through the adjustment plate 71, a gripping portion 73 disposed on the screw rod 72, and a nut 74 disposed on the adjustment plate 71 and threadedly connected to the screw rod 72. Among them, the side positioning block 8 is disposed on the screw rod 72. When the diameter of the steel bar of the workpiece changes, the positioning movement of the side positioning block 8 can be completed by directly rotating the screw rod 72, thereby realizing the side positioning block 8 to limit the side surface of the overlapped portion of the workpiece between the pair of limiting grooves 33.

[0037] The specific implementation principle of the utility model is as follows: in the actual working process, the movable clamp can be installed on a workbench or a movable device, and the axis of the overlapped part of the stirrup tends to be parallel and overlapped left and right, and the stirrup as a whole can be installed on the workbench or the movable device in a horizontal or vertical manner according to the welding method. During installation, firstly, according to the diameter of the steel bar of the workpiece, the position of the side positioning block 8 relative to the movable clamp 32 is adjusted by the low auxiliary mechanism 7, and then, according to the positioning top plate 6 being pressed on the top surface of the two overlapped ends of the workpiece and the limiting groove 33 of the fixed clamp 31 abutting one side of the overlapped part of the workpiece, the fixed clamp 31 and the movable clamp 32 are pre-positioned on both sides of the overlapped part of the workpiece, and the two overlapped ends of the workpiece can be directly prevented from jumping up and down; at the same time, after the top surface of the overlapped part of the workpiece abuts the contact, the travel switch 4 can control the clamping cylinder 2 to start; then, the movable clamp 32 and the side positioning block 8 are driven to move by the clamping cylinder 2 to force the axis of the overlapped part of the stirrup to be parallel, and the clamping of the overlapped part of the stirrup is completed. In this process, the positioning top plate 6 and the adjustable side positioning block 8 are used to limit the workpiece in two directions perpendicular to the axis of the overlapping part, and the fixed clamping plate 31 and the movable clamping plate 32 with limiting grooves 33 are used for clamping and fixing. This can prevent the two overlapping ends of the workpiece from easily jumping and misaligning during the clamping process, and has the advantage of ensuring the subsequent welding quality.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A movable clamp, comprising a mounting platform (1), a clamping cylinder (2) and a fixed clamping plate (31) arranged on the mounting platform (1), a movable clamping plate (32) arranged on the piston rod of the clamping cylinder (2), and a pair of limiting grooves (33) respectively provided on the fixed clamping plate (31) and the movable clamping plate (32), wherein the pair of limiting grooves (33) are respectively arranged on both sides of the overlapped portion of the workpiece, and characterized in that: It also includes a positioning top plate (6) arranged on the fixed clamping plate (31), a low auxiliary mechanism (7) arranged on the movable clamping plate (32), and a side positioning block (8) arranged at the movable end of the low auxiliary mechanism (7), the bottom surface of the positioning top plate (6) is arranged relative to the top surface of the workpiece overlapping portion, and the moving path of the side positioning block (8) passes through the side surface of the workpiece overlapping portion on the pair of limiting grooves (33).

2. A movable clamp according to claim 1, characterized in that: It also comprises at least two slide rails (5) arranged in parallel on the mounting platform (1), and the movable clamping plate (32) is slidably connected to these slide rails (5).

3. The movable clamp according to claim 1, characterized in that: The side walls of the limiting grooves (33) are arranged as inclined surfaces so that a constriction is formed between the pair of limiting grooves (33).

4. The movable clamp according to claim 2, characterized in that: The top wall of the limiting groove (33) is arranged to be a plane and is approximately at the same height as the bottom surface of the positioning top plate (6).

5. The movable clamp according to claim 3, characterized in that: The bottoms of the fixed clamping plate (31) and the movable clamping plate (32) are respectively provided with grooves (34); the cross section of the positioning top plate (6) is L-shaped; the top end of the positioning top plate (6) is fixed to the fixed clamping plate (31), and the bottom end passes through the grooves (34) of the fixed clamping plate (31) and the movable clamping plate (32) in sequence.

6. The movable clamp according to claim 4, characterized in that: A sliding groove (61) is provided at the bottom end of the positioning top plate (6), and the lower auxiliary mechanism (7) is slidably matched with the sliding groove (61).

7. The movable clamp according to claim 1, characterized in that: The lower pair mechanism (7) is configured as a moving pair, a spiral pair, or a cylindrical pair.

8. The movable clamp according to claim 7, characterized in that: The lower pair mechanism (7) comprises an adjustment plate (71) arranged on the fixed clamping plate (31), a screw rod (72) passing through the adjustment plate (71), and a nut (74) arranged on the adjustment plate (71) and threadedly connected to the screw rod (72); the side positioning block (8) is arranged on the screw rod (72).

9. The movable clamp according to claim 8, characterized in that: It also includes a gripping portion (73) disposed on the screw rod (72).

10. The movable clamp according to claim 1, characterized in that: It also comprises a travel switch (4) which is arranged on the mounting platform (1) and electrically connected to the clamping cylinder (2), wherein the contact of the travel switch (4) is arranged relative to the top surface of the overlapped portion of the workpiece.

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