A single-power-driven four-way automatic centering plate-type workpiece clamping mechanism

Abstract

The present invention relates to the technical field of clamping devices, and discloses a single-power-driven four-way automatic centering clamping disk-type workpiece mechanism, comprising a mounting table frame, a motor mounting welding block is arranged at the center of one side of the mounting table frame, a driving cross linear guide assembly is arranged at the upper end of the mounting table frame through the motor mounting welding block, a cantilever clamping assembly is arranged at the upper end of the driving cross linear guide assembly, and a rotating clamping cylinder assembly is arranged on the outer side of the upper end of the cantilever clamping assembly. The single-power-driven four-way automatic centering clamping disk-type workpiece mechanism is provided with a driving cross linear guide assembly, and the driving motor works to drive the forward and reverse rotating screws to rotate synchronously, and the two push plates move along the forward and reverse rotating screws, moving away from or approaching each other, and then the torque is transmitted through the connecting plates slidably connected at both ends of the push plates, driving multiple groups of sliders to slide outward or inward at the same time at an oblique angle, so as to realize automatic centering clamping action in four directions.

Description

Technical Field

[0001] The invention relates to the technical field of clamping devices, in particular to a single-power-driven four-way automatic centering plate-type workpiece clamping mechanism. Background Art

[0002] In automation equipment, mechanisms for clamping and positioning workpieces are often used. Generally, various clamping mechanisms are used to automatically complete the workpiece positioning and clamping before processing or assembly operations. After the processing or assembly operation is completed, the workpiece needs to be released. Therefore, the clamping mechanism needs to complete two actions of automatic clamping and automatic release as a cycle; among them, the automatic centering clamping mechanism is particularly widely used, and the centering clamping requirements are usually two categories: processing and assembly and positioning and transportation.

[0003] At present, the automatic clamping mechanisms commonly used in automation equipment are divided into cylinder drive and motor drive (servo motor, stepper motor) according to the different driving power forms. According to the different structural forms, the four common types are: connecting rod structure, gear rack, forward and reverse screw and synchronous belt. Among them, cylinder drive can be matched with connecting rod mechanism and gear rack structure, and motor drive can be matched with connecting rod mechanism, gear rack, forward and reverse screw and synchronous belt according to different application occasions and needs.

[0004] Usually, regular small workpieces can meet the positioning requirements by clamping them up and down or left and right. There are also cases where the workpieces are larger in size and need four-way centering to meet the requirements. For typical large-size disc-type workpieces, clamping may not necessarily achieve accuracy and stability. The current conventional design in the industry is to use two sets of centering clamping mechanisms or four-way single-control devices for clamping, which requires 2 or 4 drives to complete, resulting in a complex device structure, high cost, inability to effectively guarantee synchronization, and difficult maintenance. Therefore, it is necessary to provide a single-power drive four-way automatic centering clamping disc workpiece mechanism to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a single-power-driven four-way automatic centering plate-type workpiece clamping mechanism, which solves the problems mentioned in the above background.

[0006] The present invention provides the following technical solutions: a single-power driven four-way automatic centering mechanism for clamping a disk-type workpiece, comprising a mounting table frame, a motor mounting welding block is arranged at the center of one side of the mounting table frame, a lead screw fixed end bearing seat welding block is arranged at the center of the upper end surface of one end of the mounting table frame close to the motor mounting welding block, a lead screw support end bearing seat welding block is arranged at one end of the mounting table frame away from the lead screw fixed end bearing seat welding block, a driving cross linear guide assembly is arranged at the upper end of the mounting table frame through the motor mounting welding block, a cantilever clamping assembly is arranged at the upper end of the driving cross linear guide assembly, a disk-shaped workpiece is clamped on the inner side of the upper end of the cantilever clamping assembly, and a rotating clamping cylinder assembly is arranged on the outer side of the upper end of the cantilever clamping assembly;

[0007] The driving cross linear guide assembly includes a forward and reverse rotation screw, which is rotatably arranged at the center above the mounting platform frame, and the thread directions of the two ends of the forward and reverse rotation screw are opposite.

[0008] Preferably, the driving cross linear guide assembly also includes a motor mounting plate, a driving motor, a coupling, a bearing seat at the fixed end of the screw and a bearing seat at the supporting end of the screw. The driving motor is arranged on the upper end surface of the motor mounting welding block through the motor mounting plate, and the coupling is arranged at the output end of the driving motor.

[0009] Preferably, the end of the forward and reverse rotating screw is rotatably connected with the screw support end bearing seat and the screw support end bearing seat welding block through the screw support end bearing seat, the screw fixed end bearing seat is sleeved on the front end of the outer surface of the forward and reverse rotating screw, the forward and reverse rotating screw is rotatably connected with the screw fixed end bearing seat and the screw fixed end bearing seat welding block through the screw fixed end bearing seat, and the front end of the forward and reverse rotating screw passes through the screw fixed end bearing seat and is connected to the coupling.

[0010] Preferably, two push plates are arranged between the bearing seat at the fixed end of the screw and the bearing seat at the supporting end of the screw, and the two push plates are threadedly connected to the forward and reverse rotating screws through a connecting block in the center of the lower end surface, and sliding grooves are provided on both sides of the lower end surfaces of the two push plates, and a longitudinal movable slider is provided on the lower end surface of the push plates through the sliding groove, and a connecting plate is provided at the lower end of the longitudinal movable slider.

[0011] Preferably, linear guide rail mounting welding blocks are provided at the four corners of the upper end surface of the mounting table frame, a linear guide rail is provided on the upper end surface of the linear guide rail mounting welding block, a limit switch is provided on one side of the upper end of the connecting plate, a centering movable slider is provided at the center of the lower end surface of the connecting plate, and the connecting plate is slidably connected to the linear guide rail via the centering movable slider.

[0012] Preferably, the cantilever clamping assembly includes a supporting column, a rotating clamping cylinder mounting welding block, a bottom support block and a side clamping block. The lower end of the supporting column is connected to the connecting plate, the rotating clamping cylinder mounting welding block is arranged at the upper end of the outer side of the supporting column, the bottom support block is arranged at the top end of the supporting column, and the side clamping block is arranged on one side of the upper end of the bottom support block.

[0013] Preferably, the rotary clamping cylinder assembly is arranged on the upper end surface of the rotary clamping cylinder mounting welding block, the rotary clamping cylinder assembly includes a cylinder mounting plate, a rotary clamping cylinder, a cylinder swing arm and a pressure block, the rotary clamping cylinder can be rotated right 90°, the rotary clamping cylinder is arranged on the upper end of the rotary clamping cylinder mounting welding block through the cylinder mounting plate, the cylinder swing arm is arranged on the upper end of the rotary clamping cylinder, and the pressure block is arranged on the lower end surface of the cylinder swing arm away from one end of the rotary clamping cylinder.

[0014] Preferably, the mounting platform frame is formed by welding standard square tubes, and the four corners of the lower end of the mounting platform frame are provided with feet.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The single-power-driven four-way automatic centering clamping disc workpiece mechanism is provided with a driving cross linear guide assembly to drive the motor to work. Under the transmission action of the coupling, it can effectively drive the forward and reverse screws to rotate synchronously. The two push plates move along the forward and reverse screws, away from or close to each other, and then transmit torque through the connecting plates slidably connected at both ends of the push plates, driving multiple groups of sliders to slide outward or inward at the same time at an oblique angle. Since the cantilever clamping assembly is installed on the connecting plate, automatic centering clamping action in four directions is realized, and multiple driving mechanisms are not required.

[0017] 2. This single-power-driven four-way automatic centering clamping disc workpiece mechanism is equipped with a rotary clamping cylinder assembly. In the initial state, the piston of the rotary clamping cylinder is at the top and the piston rod does not rotate to avoid interference between the workpiece and the fixture. When the product is placed in place, the cylinder works, and the piston moves downward. At the same time, the piston rod drives the pressure block to rotate 90° to clamp the workpiece, so that in addition to the clamping force on all sides, two vertical downward pressures are added on the top to make the workpiece fixation more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the single-power-driven four-way automatic centering plate-type workpiece clamping mechanism of the present invention;

[0019] Figure 2 It is a partial structural schematic diagram of the single-power-driven four-way automatic centering plate-type workpiece clamping mechanism of the present invention;

[0020] Figure 3It is a structural schematic diagram of the mounting platform frame of the present invention;

[0021] Figure 4 This is a schematic diagram of the installation structure of the drive motor of the present invention;

[0022] Figure 5 It is a schematic diagram of the partial structure of the driving cross linear guide assembly of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the cantilever clamping assembly of the present invention;

[0024] Figure 7 It is a structural schematic diagram of the rotary pressing cylinder assembly of the present invention.

[0025] In the figure: 1. Mounting table frame; 101. Foot; 102. Motor mounting welding block; 103. Screw fixed end bearing seat welding block; 104. Linear guide mounting welding block; 105. Screw support end bearing seat welding block; 2. Drive cross linear guide assembly; 201. Motor mounting plate; 202. Drive motor; 203. Coupling; 204. Forward and reverse rotation screw; 205. Screw fixed end bearing seat; 206. Screw support end bearing seat; 207. Push plate ; 208, connecting plate; 209, longitudinal moving slider; 210, limit switch; 211, linear guide; 212, center moving slider; 3, cantilever clamping assembly; 301, supporting column; 302, rotary clamping cylinder mounting welding block; 303, bottom support block; 304, side clamping block; 4, disc-shaped workpiece; 5, rotary clamping cylinder assembly; 501, cylinder mounting plate; 502, rotary clamping cylinder; 503, cylinder swing arm; 504, pressure block. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-7A single-power-driven four-way automatic centering mechanism for clamping a disc-type workpiece comprises a mounting table frame 1, a motor mounting welding block 102 is arranged at the center of one side of the mounting table frame 1, a screw fixed end bearing seat welding block 103 is arranged at the center of the upper end surface of the mounting table frame 1 close to the motor mounting welding block 102, a screw support end bearing seat welding block 105 is arranged at the end of the mounting table frame 1 away from the screw fixed end bearing seat welding block 103, a driving cross linear guide assembly 2 is arranged at the upper end of the mounting table frame 1 through the motor mounting welding block 102, a cantilever clamping assembly 3 is arranged at the upper end of the driving cross linear guide assembly 2, a disc-shaped workpiece 4 is clamped on the inner side of the upper end of the cantilever clamping assembly 3, and a rotating pressing cylinder assembly 5 is arranged on the outer side of the upper end of the cantilever clamping assembly 3;

[0028] The driving cross linear guide assembly 2 includes a forward and reverse rotating lead screw 204, which is rotatably arranged at the center above the mounting platform frame 1, and the thread directions of the two ends of the forward and reverse rotating lead screw 204 are opposite.

[0029] Among them; the driving cross linear guide assembly 2 also includes a motor mounting plate 201, a driving motor 202, a coupling 203, a screw fixed end bearing seat 205 and a screw support end bearing seat 206. The driving motor 202 is arranged on the upper end surface of the motor mounting welding block 102 through the motor mounting plate 201, and the coupling 203 is arranged at the output end of the driving motor 202. The end of the forward and reverse rotation screw 204 is rotatably connected with the screw support end bearing seat welding block 105 through the screw support end bearing seat 206. The screw fixed end bearing seat 205 is sleeved on the front end of the outer surface of the forward and reverse rotation screw 204. 04 is rotatably connected with the screw fixed end bearing seat 205 and the screw fixed end bearing seat welding block 103, and the front end of the forward and reverse rotating screw 204 passes through the screw fixed end bearing seat 205 and is connected with the coupling 203. By setting the motor mounting welding block 102 and the motor mounting plate 201, it is convenient to install and fix the drive motor 202. By setting the screw fixed end bearing seat 205 and the screw support end bearing seat 206, it can effectively play a limiting support role for the forward and reverse rotating screw 204. By driving the motor 202, under the transmission action of the coupling 203, it can effectively drive the forward and reverse rotating screws 204 to rotate synchronously.

[0030] Among them; two push plates 207 are arranged between the bearing seat 205 at the fixed end of the screw and the bearing seat 206 at the supporting end of the screw, and the two push plates 207 are threadedly connected to the forward and reverse rotation screw 204 through the connecting block at the center of the lower end surface, and the two push plates 207 are provided with sliding grooves on both sides of the lower end surface, and the lower end surface of the push plates 207 is provided with a longitudinal moving slider 209 through the sliding groove, and the lower end of the longitudinal moving slider 209 is provided with a connecting plate 208, and the four corners of the upper end surface of the mounting table frame 1 are provided with linear guide rail mounting welding blocks 104, and the upper end surface of the linear guide rail mounting welding block 104 is provided with a linear guide 211, and a limit switch 2 is provided on one side of the upper end of the connecting plate 208 10. A centering movable slider 212 is provided at the center of the lower end surface of the connecting plate 208. The connecting plate 208 is slidably connected to the linear guide 211 through the centering movable slider 212. The linear guide 211 is installed in a vertically symmetrical relationship directly above the mounting table frame 1. By rotating the forward and reverse screws 204, the two push plates 207 can be moved along the forward and reverse screws 204, away from or close to each other, and then the torque is transmitted through the connecting plate 208 slidably connected at both ends of the push plates 207, driving multiple groups of sliders to slide outward or inward at the same time at an oblique angle. Since the cantilever clamping assembly 3 is installed on the connecting plate 208, automatic centering clamping actions in four directions are realized.

[0031] Among them; the cantilever clamping assembly 3 includes a supporting column 301, a rotary clamping cylinder mounting welding block 302, a bottom support block 303 and a side clamping block 304. The lower end of the supporting column 301 is connected to the connecting plate 208, the rotary clamping cylinder mounting welding block 302 is arranged at the upper end of the outer side of the supporting column 301, the bottom support block 303 is arranged at the top of the supporting column 301, and the side clamping block 304 is arranged on one side of the upper end of the bottom support block 303. The supporting column 301 is installed on the connecting plate 208 and moves synchronously with the connecting plate 208. The bottom support block 303 is used to support the workpiece and is made of nylon to reduce the friction with the workpiece, avoid scratching the workpiece, and prevent the workpiece from falling. The side clamping block 304 is made of polyurethane to increase the friction with the workpiece to make it clamped stably. The rotary clamping cylinder mounting welding block 302 is arranged to facilitate the installation of the rotary clamping cylinder assembly 5.

[0032] Among them; the rotary clamping cylinder assembly 5 is arranged on the upper end surface of the rotary clamping cylinder mounting welding block 302, the rotary clamping cylinder assembly 5 includes a cylinder mounting plate 501, a rotary clamping cylinder 502, a cylinder swing arm 503 and a pressure block 504, the rotary clamping cylinder 502 can be rotated right 90°, the rotary clamping cylinder 502 is arranged on the upper end of the rotary clamping cylinder mounting welding block 302 through the cylinder mounting plate 501, the cylinder swing arm 503 is arranged on the upper end of the rotary clamping cylinder 502, and the pressure block 504 is arranged on the lower end surface of the cylinder swing arm 503 away from the rotary clamping cylinder 502, which can be obliquely The rotary clamping cylinder assembly 5 is installed on the two cantilever clamping devices at the corners. The rotary clamping cylinder 502 can rotate right 90°, has a cylinder diameter of 50mm and a stroke of 50mm, and can clamp products with a thickness of 50mm. In the initial state, the piston of the rotary clamping cylinder 502 is at the top and the piston rod does not rotate to avoid interference between the workpiece and the fixture. When the product is put in place, the cylinder works, and the piston moves downward. At the same time, the piston rod drives the pressure block 504 to rotate 90° to clamp the workpiece, so that in addition to the clamping force on all sides, two vertical downward pressures are added on the top to make the workpiece fixation more stable and reliable.

[0033] The mounting platform frame 1 is welded from standard square tubes, and the four corners of the lower end of the mounting platform frame 1 are provided with feet 101. The feet 101 can be effectively used to support the mounting platform frame 1 to ensure the overall stability.

[0034] Working principle: the drive motor 202 works, and under the transmission action of the coupling 203, it can effectively drive the forward and reverse rotating screws 204 to rotate synchronously, and the two push plates 207 move along the forward and reverse rotating screws 204, away from or close to each other, and then transmit torque through the connecting plate 208 slidably connected at both ends of the push plates 207, driving multiple groups of sliders to slide outward or inward at the same angle. Since the cantilever clamping assembly 3 is installed on the connecting plate 208, automatic centering clamping action in four directions is realized. The support column 301 is installed on the connecting plate 208 and moves synchronously with the connecting plate 208. The bottom support block 303 is used to support the workpiece. It is made of nylon to reduce the friction with the workpiece, avoid scratching the workpiece, and prevent the workpiece from falling. The side clamping block 304 is made of polyurethane to increase the friction with the workpiece and make it stable.

[0035] Furthermore, a rotary clamping cylinder assembly 5 can be installed on two diagonally opposite cantilever clamping devices. The rotary clamping cylinder 502 can rotate right 90°, has a cylinder diameter of 50mm and a stroke of 50mm, and can clamp products with a thickness of 50mm. In the initial state, the piston of the rotary clamping cylinder 502 is at the top and the piston rod does not rotate to avoid interference between the workpiece and the fixture. When the product is put in place, the cylinder works, and the piston moves downward. At the same time, the piston rod drives the pressure block 504 to rotate 90° to clamp the workpiece, so that in addition to the clamping force on all sides, two vertical downward pressures are added on the top to make the workpiece fixation more stable and reliable.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single-power-driven four-way automatic centering plate-type workpiece clamping mechanism, characterized in that: The invention comprises a mounting platform frame (1), wherein a motor mounting welding block (102) is arranged at the center of one side of the mounting platform frame (1), a screw fixed end bearing seat welding block (103) is arranged at the center of the upper end surface of the mounting platform frame (1) close to the motor mounting welding block (102), and a screw support end bearing seat welding block (105) is arranged at the end of the mounting platform frame (1) away from the screw fixed end bearing seat welding block (103); a driving cross linear guide assembly (2) is arranged at the upper end of the mounting platform frame (1) through the motor mounting welding block (102), and a cantilever clamping assembly (3) is arranged at the upper end of the driving cross linear guide assembly (2); a disc-shaped workpiece (4) is clamped on the inner side of the upper end of the cantilever clamping assembly (3), and a rotating clamping cylinder assembly (5) is arranged on the outer side of the upper end of the cantilever clamping assembly (3); The driving cross linear guide assembly (2) comprises a forward and reverse rotating lead screw (204), the forward and reverse rotating lead screw (204) being rotatably arranged at the center above the mounting platform frame (1), and the thread directions of the two ends of the forward and reverse rotating lead screw (204) being opposite.

2. According to claim 1, a single-power-driven four-way automatic centering plate-type workpiece clamping mechanism is characterized in that: The driving cross linear guide assembly (2) also includes a motor mounting plate (201), a driving motor (202), a coupling (203), a screw fixing end bearing seat (205) and a screw supporting end bearing seat (206); the driving motor (202) is arranged on the upper end surface of the motor mounting welding block (102) through the motor mounting plate (201); and the coupling (203) is arranged at the output end of the driving motor (202).

3. A single-power-driven four-way automatic centering plate-type workpiece clamping mechanism according to claim 2, characterized in that: The ends of the forward and reverse rotating screws (204) are rotatably connected to the screw support end bearing seat welding block (105) via the screw support end bearing seat (206); the screw fixed end bearing seat (205) is sleeved on the front end of the outer surface of the forward and reverse rotating screws (204); the forward and reverse rotating screws (204) are rotatably connected to the screw fixed end bearing seat welding block (103) via the screw fixed end bearing seat (205); and the front ends of the forward and reverse rotating screws (204) pass through the screw fixed end bearing seat (205) and are connected to the coupling (203).

4. A single-power-driven four-way automatic centering plate-type workpiece clamping mechanism according to claim 3, characterized in that: Two push plates (207) are arranged between the bearing seat (205) at the fixed end of the screw and the bearing seat (206) at the supporting end of the screw. The two push plates (207) are threadedly connected to the forward and reverse rotating screw (204) through a connecting block at the center of the lower end surface. Slide grooves are provided on both sides of the lower end surfaces of the two push plates (207). A longitudinal movable slider (209) is arranged on the lower end surface of the push plates (207) through the slide groove, and a connecting plate (208) is arranged at the lower end of the longitudinal movable slider (209).

5. A single-power-driven four-way automatic centering plate-type workpiece clamping mechanism according to claim 4, characterized in that: The four corners of the upper surface of the mounting platform frame (1) are each provided with a linear guide rail mounting welding block (104), the upper surface of the linear guide rail mounting welding block (104) is provided with a linear guide rail (211), a limit switch (210) is provided on one side of the upper end of the connecting plate (208), a centering movable slider (212) is provided at the center of the lower surface of the connecting plate (208), and the connecting plate (208) is slidably connected to the linear guide rail (211) via the centering movable slider (212).

6. A single-power-driven four-way automatic centering plate-type workpiece clamping mechanism according to claim 1, characterized in that: The cantilever clamping assembly (3) comprises a supporting column (301), a rotating clamping cylinder mounting welding block (302), a bottom supporting block (303) and a side clamping block (304); the lower end of the supporting column (301) is connected to the connecting plate (208); the rotating clamping cylinder mounting welding block (302) is arranged at the upper end of the outer side of the supporting column (301); the bottom supporting block (303) is arranged at the top end of the supporting column (301); and the side clamping block (304) is arranged at one side of the upper end of the bottom supporting block (303).

7. A single-power-driven four-way automatic centering plate-type workpiece clamping mechanism according to claim 1, characterized in that: The rotary pressing cylinder assembly (5) is arranged on the upper end surface of the rotary pressing cylinder mounting welding block (302), and the rotary pressing cylinder assembly (5) comprises a cylinder mounting plate (501), a rotary pressing cylinder (502), a cylinder swing arm (503) and a pressure block (504). The rotary pressing cylinder (502) can be rotated right by 90 degrees. The rotary pressing cylinder (502) is arranged on the upper end of the rotary pressing cylinder mounting welding block (302) through the cylinder mounting plate (501), the cylinder swing arm (503) is arranged on the upper end of the rotary pressing cylinder (502), and the pressure block (504) is arranged on the lower end surface of the cylinder swing arm (503) away from the rotary pressing cylinder (502).

8. The single-power-driven four-way automatic centering plate-type workpiece clamping mechanism according to claim 1 is characterized in that: The mounting platform frame (1) is formed by welding standard square tubes, and the four corners of the lower end of the mounting platform frame (1) are provided with footings (101).

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