Rotary clamping tool

Abstract

The utility model relates to the technical field of bracelet processing, in particular to a rotary clamping tool which comprises an anti-skid base, the top of the anti-skid base is connected with a hydraulic oil cylinder, a movable rack and a fixed rack through bolts, the movable rack is located between the hydraulic oil cylinder and the fixed rack, and the fixed rack is connected with the movable rack through bolts. The power output end of the hydraulic oil cylinder is connected to one side of the movable rack through a bolt. According to the improved rotary clamping tool, the clamp base achieves transmission under a threaded structure, then opening and closing of the arc-shaped clamping pieces are achieved through the first connecting rods and the second connecting rods, bracelet workpieces with different diameters can be fixed, the arc-shaped clamping pieces and related structures are connected through the multiple sets of connecting rod mechanisms in the vertical different directions, and the clamping efficiency is improved. Two-way supporting is provided for the arc-shaped clamping piece, the bracelet clamping device is more stable when clamping a bracelet, rotation is achieved through a stepping motor and a gear assembly of a driving gear and a driven gear, the rotation angle of the front end can be accurately controlled, and stable operation and machining precision of equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bracelet processing, in particular to a rotary clamping tool. Background Art

[0002] Bracelet processing refers to the process of making raw materials into decorative and functional bracelets through a series of processes and technical means.

[0003] The bracelet processing fixture is a tool device used to fix and clamp the semi-finished bracelet during the production process to ensure the accuracy, stability and safety of the processing operation. The rotating type refers to the function of rotating around a specific axis to achieve flexible rotation during the processing process.

[0004] In the process of realizing the utility model, the inventor discovered that the prior art has the following problems: 1. At present, in the processing process of bracelet crafts, since the calibers of bracelets are of different sizes, bracelets of different calibers need to be equipped with a special clamp of matching caliber during processing. This operation method will cause the inconvenience of loading and unloading pieces and increase the time efficiency of frequent clamp changes; 2. At present, some static clamps have certain limitations in the processing process and can only work at limited fixed angles. The processing personnel need to constantly adjust the position of the bracelet on the clamp, or move around the clamp themselves. Although some rotatable clamps have rotation functions, some hand-cranked or automatic drive structures will cause unstable factors, which will affect the front-end processing technology. Utility Model Content

[0005] The purpose of the present utility model is to provide a rotary clamping fixture to solve the inconvenience of upper and lower parts mentioned in the above-mentioned background technology, increase the timeliness of frequent clamping, and the problem that some hand-cranked or automatic driving structures may cause unstable factors. In order to achieve the above-mentioned purpose, the present utility model provides the following technical solutions: a rotary clamping fixture, including an anti-slip base, the top of the anti-slip base is respectively connected to a hydraulic cylinder, a mobile frame and a fixed frame by bolts, the mobile frame is located between the hydraulic cylinder and the fixed frame, the power output end of the hydraulic cylinder is connected to one side of the mobile frame by bolts, one side of the fixed frame is provided with a main connecting rod, one end of the main connecting rod passes through the fixed frame and is rotatably connected to the fixed frame through a bearing, and the main connecting rod passes through one end of the fixed frame The outer wall of the main connecting rod is connected to one side of the mobile frame through a limit bolt, and a connecting base is provided on the outer wall of the main connecting rod, and a screw is provided on the adjacent side of the connecting base. One end of the screw is rotatably connected to the inside of the main connecting rod, and the other end of the screw is installed with a rotating handle. The outer wall of the screw is threadedly connected to a clamp base, and the clamp base is located between the rotating handle and the connecting base. The clamp base is movably connected to one side of the arc-shaped clamp through the first connecting rod provided thereon, and the arc-shaped clamp is movably connected to the connecting base on the adjacent side through the second connecting rod.

[0006] A driving gear and a driven gear are installed inside the mobile frame, the driving gear is meshed with one side of the driven gear and is rotatably connected to the inside of the mobile frame through the output end of the stepper motor, the driven gear is welded to a connecting end on one side of the outer wall of the mobile frame through a shaft rod running through the axis center, the connecting end is welded with limiting blocks respectively through springs provided on both sides of the interior thereof, and the limiting blocks are movably connected to the through holes on both sides of the outer wall of the connecting end.

[0007] Further preferably, the movable frame is slidably connected to the surface of the anti-slip base via a hydraulic cylinder, and a ladder-shaped rubber pad is provided at the bottom of the anti-slip base.

[0008] Further preferably, the connecting end forms a rotating structure on one side of the mobile frame through a driven gear coaxially connected thereto, and the main connecting rod and the connecting end are located at the same horizontal position and a groove for plugging the connecting end is provided on the surface of the shaft head adjacent to the connecting end, and the connecting end is threadedly connected to the groove of the shaft head on one side of the main connecting rod through a limit bolt.

[0009] Further preferably, the limit block forms an elastic reset structure at both ends of the outer wall of the connecting end through a spring, and one end of the main connecting rod is used to insert into the connecting end groove, and corresponding circular through holes are provided on both sides for engaging the connecting limit block.

[0010] Further preferably, the clamp base forms a horizontal transmission structure on one side of the connection base through a screw, and the first connecting rod and the second connecting rod form a folding structure through the clamp base.

[0011] Further preferably, the arc-shaped clips are distributed in a ring shape on the outer wall of the clamp base, and the arc-shaped clips are movably connected to the corresponding ring-shaped grooves on the surface of the clamp base through the first connecting rods distributed in parallel up and down on one side of the arc-shaped clips, and the first connecting rod and the second connecting rod form an opening and closing structure.

[0012] Further preferably, a rubber retaining ring having an arc-shaped edge and warping upward is provided on one side of the outer wall of the arc-shaped clip.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] In the utility model, the main connecting rod is installed with the mobile frame through the connecting end, so as to realize the rotation of the whole clamp assembly. Under the double fixed structure, the connection between the two is more stable and reliable, and the risk of loosening and falling off during the rotation process is reduced. The rotation is realized by the gear assembly of the stepping motor and the driving gear and the driven gear. The rotation angle of the front end can be accurately controlled, and the rotation speed and precise position can be adjusted according to the requirements of the workpiece, thereby improving the stable operation of the equipment and the processing accuracy.

[0015] In the utility model, the rotation of the screw can enable the clamp base to realize transmission under the threaded structure, and then the opening and closing of the arc-shaped clamping piece can be realized through the first connecting rod and the second connecting rod. It can fix bracelet workpieces of different diameters, thereby improving the versatility of the equipment. Multiple sets of connecting rod mechanisms connect the arc-shaped clamping piece and related structures from different directions up and down, providing two-way support for the arc-shaped clamping piece, making it more stable when clamping the bracelet, and ensuring that the arc-shaped clamping piece is subjected to more uniform force during the clamping process, and can fit more tightly and stably on the inner wall of the bracelet, thereby improving its clamping effect. The structural form of one side of the outer wall of the arc-shaped clamping piece can maintain the fit with the workpiece in the subsequent process, increase the contact area and friction with the workpiece, and further prevent the workpiece from sliding and displacing during the clamping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the main view folding structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the fixture base of the utility model;

[0019] Figure 4 It is a schematic diagram of the internal structure of the mobile rack of the utility model.

[0020] In the figure: 1. Anti-slip base; 2. Hydraulic cylinder; 3. Mobile frame; 301. Driving gear; 302. Driven gear; 303. Connecting end; 304. Limit block; 4. Fixed frame; 5. Main connecting rod; 6. Limit bolt; 7. Connecting base; 8. Screw; 9. Rotating handle; 10. Clamp base; 11. First connecting rod; 12. Arc-shaped clip; 13. Second connecting rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 4 The utility model provides a technical solution: a rotary clamping tool, including an anti-skid base 1, the top of the anti-skid base 1 is respectively connected with a hydraulic cylinder 2, a mobile frame 3 and a fixed frame 4 by bolts, the mobile frame 3 is located between the hydraulic cylinder 2 and the fixed frame 4, the power output end of the hydraulic cylinder 2 is connected to one side of the mobile frame 3 by bolts, one side of the fixed frame 4 is provided with a main connecting rod 5, one end of the main connecting rod 5 passes through the fixed frame 4 and is rotatably connected to the fixed frame 4 through a bearing, and one end of the main connecting rod 5 passes through the fixed frame 4 and is connected to the mobile frame 3 by a limit bolt 6. One side of the machine frame 3 is connected, the outer wall of the main connecting rod 5 is provided with a connecting base 7, and the adjacent side of the connecting base 7 is provided with a screw 8, one end of the screw 8 is rotatably connected to the inside of the main connecting rod 5, and the other end of the screw 8 is installed with a rotating handle 9, and the outer wall of the screw 8 is threadedly connected with a clamp base 10, and the clamp base 10 is located between the rotating handle 9 and the connecting base 7. The clamp base 10 is movably connected to one side of the arc-shaped clip 12 through the first connecting rod 11 provided thereon, and the arc-shaped clip 12 is movably connected to the connecting base 7 on the adjacent side through the second connecting rod 13.

[0023] A driving gear 301 and a driven gear 302 are installed inside the mobile frame 3. The driving gear 301 is meshed with one side of the driven gear 302 and is rotatably connected to the inside of the mobile frame 3 through the output end of the stepper motor. The driven gear 302 is welded to a connecting terminal 303 on one side of the outer wall of the mobile frame 3 through a shaft rod running through its axis. The connecting terminal 303 is welded with limit blocks 304 through springs on both sides of the connecting terminal 303. The limit blocks 304 are movably connected to the through holes on both sides of the outer wall of the connecting terminal 303.

[0024] In this embodiment, Figure 1 and Figure 2 As shown, the movable frame 3 is slidably connected to the surface of the anti-skid base 1 through the hydraulic cylinder 2, and a ladder-shaped rubber pad is provided at the bottom of the anti-skid base 1; when the movable frame 3 and the main connecting rod 5 at the front end are installed, they can be driven to rotate to provide more convenient and favorable conditions for the processing technology, and the hydraulic cylinder 2 is convenient for movement at one end of the main connecting rod 5 to separate from the main connecting rod 5, so that maintenance personnel can focus on checking specific parts, which greatly simplifies the maintenance process and reduces the difficulty of operation. In addition, the structural form of the bottom of the anti-skid base 1 can effectively prevent the entire device from sliding and displacing during operation, thereby ensuring the accuracy and safety of processing.

[0025] In this embodiment, Figure 4 As shown, the connecting end 303 forms a rotating structure on one side of the mobile frame 3 through the driven gear 302 coaxially connected thereto, and the main connecting rod 5 and the connecting end 303 are located at the same horizontal position and a groove for plugging and connecting the connecting end 303 is provided on the surface of the shaft head adjacent to the connecting end 303, and the connecting end 303 is threadedly connected to the groove of the shaft head on one side of the main connecting rod 5 through the limit bolt 6; the main connecting rod 5 is installed with the mobile frame 3 through the connecting end 303, thereby realizing the rotation of the overall clamp assembly, and the connecting end 303 and the main connecting rod 5 are successively fixed by plugging and threading. The connection is made, and the double-fixed structure makes the connection between the two more stable and reliable, reducing the risk of loosening and falling off during rotation, and the groove at the connecting end 303 and the shaft head of the main connecting rod 5 can maintain concentricity, thereby further improving the stability of the rotation of the front-end clamp assembly. At the same time, compared with some hand-cranked or directly driven rotary clamps using the power output end, it realizes rotation through the gear assembly of the stepping motor and the driving gear 301 and the driven gear 302, and can accurately control the rotation angle of the front end, and can adjust the rotation speed and precise position according to the requirements of the workpiece, thereby improving the stable operation of the equipment and the processing accuracy.

[0026] In this embodiment, Figure 4 As shown, the limit block 304 forms an elastic reset structure at both ends of the outer wall of the connecting end 303 through a spring, and one end of the main connecting rod 5 is used to insert into the connecting end 303 groove, and corresponding circular through holes are provided on both sides for engaging the connecting limit block 304; the contraction structure of the limit block 304 is convenient for the connecting end 303 and the main connecting rod 5 to be reset again through the elastic structure after the connection is completed. It extends out through the through holes on both sides of the main connecting rod 5, thereby realizing the rapid installation of the connecting end 303 and the main connecting rod 5, while ensuring the stability of the connection, simplifying the installation steps, and the operator can intuitively confirm whether the connecting end 303 and the main connecting rod 5 are installed in place through the engaging structure of the limit block 304, thereby realizing subsequent operations.

[0027] In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, the clamp base 10 forms a horizontal transmission structure on one side of the connecting base 7 through the screw 8, and the first connecting rod 11 and the second connecting rod 13 form a folding structure through the clamp base 10; the rotation of the screw 8 can enable the clamp base 10 to realize transmission under the threaded structure, and then the opening and closing of the arc-shaped clamp 12 is realized through the first connecting rod 11 and the second connecting rod 13, which can fix bracelet workpieces of different diameters, improve the versatility of the equipment, and effectively avoid the unnecessary frequent replacement of the clamp mold due to different workpiece diameters. After the clamp base 10 is adjusted to a suitable work position with the screw 8, the self-locking property of the screw 8 can effectively prevent the clamp base 10 from moving due to external force during the processing, ensuring that the arc-shaped clamp 12 always remains at the set opening and closing degree, reducing the processing error caused by looseness, and helping to improve the accuracy and quality of bracelet processing. In order to improve the comfort and convenience of operation, the outer wall of the rotating handle 9 has a ring-shaped strip structure to increase friction to adapt to the operator's grip method and strength, and has a certain anti-slip effect.

[0028] In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, the arc-shaped clips 12 are distributed in a ring shape on the outer wall of the clamp base 10, and the arc-shaped clips 12 are movably connected to the corresponding ring-shaped grooves on the surface of the clamp base 10 through the first connecting rods 11 distributed in parallel up and down on one side thereof, and the arc-shaped clips 12 are passed through the first connecting rods 11 and the second connecting rods 13 to form an opening and closing structure; the arc-shaped clips 12 and related structures are connected from different directions in the upper and lower directions by multiple groups of connecting rod mechanisms, which provides two-way support for the arc-shaped clips 12, making it more stable when clamping the bracelet and reducing the problem of shaking and deviation, and the two-way action of the first connecting rod 11 and the second connecting rod 13 can also ensure that the arc-shaped clips 12 are subjected to more uniform force during the clamping process, and can fit more tightly and stably on the inner wall of the bracelet, thereby improving its clamping effect.

[0029] In this embodiment, Figure 3 and Figure 4 As shown, one side of the outer wall of the arc-shaped clamp 12 is provided with a rubber retaining ring which is also an arc-shaped surrounding edge and is tilted upward; the structural form of one side of the outer wall of the arc-shaped clamp 12 can maintain the fit with the workpiece in the future, increase the contact area and friction with the workpiece, further prevent the workpiece from sliding and displacing during the clamping process, improve the stability of the clamping, and its use of rubber material effectively avoids wear on the workpiece surface.

[0030] The use method and advantages of the utility model: When the rotary clamping tool is used, the working process is as follows:

[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, first, the workpiece is inserted into the surface of the arc-shaped clip 12 from one end of the rotating handle 9, and the opening and closing degree of the arc-shaped clip 12 is adjusted according to the diameter of the bracelet. The rotating handle 9 is rotated to rotate the screw 8, and the clamp base 10 threadedly connected thereto moves to one side of the rotating handle 9 in a horizontal transmission under the threaded structure. During the movement, the two groups of first connecting rods 11 and second connecting rods 13 are simultaneously unfolded, thereby driving the arc-shaped clip 12 annularly distributed on the outer circle of the clamp base 10 to gradually unfold and open, thereby fixing the bracelet originally sleeved on its surface. During the processing, if the clamp that fixes the workpiece needs to rotate as a whole to cooperate with the operating process, the power can be turned on, and the output end of the stepper motor will drive the driving gear 301 to rotate, and then the driven gear 302 rotates and drives the coaxially connected connecting end 303 to rotate, because the connecting end 303 is connected to the main connecting rod 5 through the dual fixation of the snap-fit ​​and the thread, thereby realizing that the main connecting rod 5 drives the front end parts to rotate together, which improves the convenience of the processing process, and when the stepper motor is not driven, The active gear 301 and the driven gear 302 form a good self-locking mechanism due to their tooth shape, gear ratio and mutual meshing mode, which can prevent the front end structure from rotating, thereby ensuring the possibility of the main connecting rod 5 rotating when the power is not turned on. When the equipment needs maintenance, the main connecting rod 5 can be separated from the rear structure, and the limit bolt 6 can be rotated to remove it from the connection between the connecting end 303 and the main connecting rod 5. After turning on the power, the power output end of the hydraulic cylinder 2 pulls the mobile frame 3 to move backward, and both hands The limit blocks 304 extending in the through holes on both sides of the outer wall of the main connecting rod 5 are pressed, and they expand and contract inward under the elastic structure, and at the same time are separated from the through holes on both sides of the outer wall of the main connecting rod 5, and the connecting end 303 is disengaged from the groove in the main connecting rod 5 along with the synchronously running mobile frame 3. It should be noted that in order to improve the safety of the equipment, the hydraulic cylinder 2 can adjust its movement speed by controlling the flow of the hydraulic oil inside it, so that it can be pushed slowly, and the clamp can be used for bracelet workpieces with a ring diameter between 52mm and 62mm.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Technical staff in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A rotary clamping tool, comprising a non-slip base (1), characterized in that: The top of the anti-slip base (1) is respectively connected to a hydraulic cylinder (2), a mobile frame (3) and a fixed frame (4) by bolts; the mobile frame (3) is located between the hydraulic cylinder (2) and the fixed frame (4); the power output end of the hydraulic cylinder (2) is connected to one side of the mobile frame (3) by bolts; one side of the fixed frame (4) is provided with a main connecting rod (5); one end of the main connecting rod (5) passes through the fixed frame (4) and is rotatably connected to the fixed frame (4) by a bearing; one end of the main connecting rod (5) passes through the fixed frame (4) and is connected to one side of the mobile frame (3) by a limit bolt (6); the main connecting rod (5) ) is provided with a connection base (7) on its outer wall, a screw rod (8) is provided on one side adjacent to the connection base (7), one end of the screw rod (8) is rotatably connected to the inside of the main connecting rod (5), a rotating handle (9) is installed on the other end of the screw rod (8), a clamp base (10) is threadedly connected to the outer wall of the screw rod (8), the clamp base (10) is located between the rotating handle (9) and the connection base (7), the clamp base (10) is movably connected to one side of the arc-shaped clamping piece (12) through a first connecting rod (11) provided thereon, and the arc-shaped clamping piece (12) is movably connected to the connection base (7) on one side adjacent to the connection base (7) through a second connecting rod (13); A driving gear (301) and a driven gear (302) are installed inside the mobile frame (3); the driving gear (301) is meshed with one side of the driven gear (302) and is rotatably connected to the inside of the mobile frame (3) through the output end of the stepping motor; the driven gear (302) is welded to a connecting end (303) on one side of the outer wall of the mobile frame (3) via a shaft rod penetrating through the axis center thereof; the connecting end (303) is welded with limit blocks (304) respectively via springs provided on both sides of the connecting end; and the limit blocks (304) are movably connected to through holes on both sides of the outer wall of the connecting end (303).

2. The rotary clamping tool according to claim 1, characterized in that: The movable frame (3) is slidably connected to the surface of the anti-skid base (1) via a hydraulic cylinder (2), and a ladder-shaped rubber pad is provided at the bottom of the anti-skid base (1).

3. The rotary clamping tool according to claim 1, characterized in that: The connecting end (303) forms a rotating structure on one side of the moving frame (3) through a driven gear (302) coaxially connected thereto, and the main connecting rod (5) and the connecting end (303) are located at the same horizontal position and a groove for plugging and connecting the connecting end (303) is provided on the surface of an axis head adjacent to the connecting end (303), and the connecting end (303) is threadedly connected to the groove of the axis head on one side of the main connecting rod (5) through a limiting bolt (6).

4. The rotary clamping tool according to claim 1, characterized in that: The limit block (304) forms an elastic reset structure at both ends of the outer wall of the connecting end (303) through a spring, and one end of the main connecting rod (5) is used to insert into the connecting end (303) and has circular through holes corresponding to the two sides of the groove for engaging the connecting limit block (304).

5. The rotary clamping tool according to claim 1, characterized in that: The clamp base (10) forms a horizontal transmission structure on one side of the connection base (7) through a screw rod (8), and the first connecting rod (11) and the second connecting rod (13) form a folding structure through the clamp base (10).

6. The rotary clamping tool according to claim 1, characterized in that: The arc-shaped clips (12) are distributed in an annular shape on the outer wall of the clamp base (10), and the arc-shaped clips (12) are movably connected to the corresponding annular grooves on the surface of the clamp base (10) through the first connecting rods (11) distributed in parallel up and down on one side of the arc-shaped clips (12), and the first connecting rod (11) and the second connecting rod (13) form an opening and closing structure between the arc-shaped clips (12).

7. The rotary clamping tool according to claim 1, characterized in that: A rubber retaining ring having an arc-shaped peripheral edge and warping upward is provided on one side of the outer wall of the arc-shaped clamping piece (12).

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