Pneumatic clamp for mechanical equipment

Abstract

The pneumatic clamp for the mechanical equipment particularly relates to the technical field of the mechanical equipment and comprises a connecting piece, an electric cylinder is fixedly installed in the bottom wall of an inner cavity of a shell in a protecting mode, and an output shaft of the electric cylinder penetrates through the bottom wall of the inner cavity of the shell and is fixedly connected with a connecting shaft through a coupler. A clamping device is arranged on the upper side of the outer surface of the connecting shaft, and a suction cup assembly is installed at the bottom end of the connecting shaft. According to the pneumatic clamp for the mechanical equipment, the electric cylinder is arranged to drive the suction cup assembly to downwards suck a workpiece in a negative pressure mode, the clamping device is driven to clamp the workpiece when the electric cylinder drives the suction cup assembly to downwards suck the workpiece, and therefore when the electric cylinder is matched with the suction cup assembly to clamp the workpiece, the clamping device is driven to clamp the workpiece; the electric cylinder can share part of the weight of the workpiece, the situation that the workpiece is damaged due to the fact that the clamping force of the suction cup assembly is too large is avoided, meanwhile, the suction cup assembly prevents the workpiece from shaking in the clamping process, and it is guaranteed that the workpiece is always kept in the stable state in the whole operation process.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment, in particular to a pneumatic clamp for mechanical equipment. Background Art

[0002] Fixtures for mechanical equipment are important tools widely used in mechanical processing and manufacturing. Their main function is to firmly clamp the workpiece to maintain a stable position to ensure processing accuracy and quality. Different mechanical equipment requires fixtures of different designs to adapt to workpieces of various shapes, sizes and materials. Fixtures play a vital role in mechanical processing and manufacturing. Reasonable design selection can improve processing accuracy, production efficiency and product quality, providing strong support for the development of the machinery manufacturing industry.

[0003] A Chinese patent with authorization announcement number CN219212872U discloses a pneumatic clamp for electrical machinery equipment, comprising a support base, a fixed clamping plate installed on the left upper end of the support base, a dynamic clamp seat installed on the right upper end of the support base, a pneumatic clamping device installed on the left end of the dynamic clamp seat, height adjustment devices installed on both the left and right ends of the support base, and a fixing device installed at the front and rear ends of the two height adjustment devices. The pneumatic clamp for electrical machinery equipment described in the device not only enables the device to clamp workpieces of different models through the pneumatic clamping device, but also can be retracted into a movable groove when the dynamic clamp block is not in use, thereby protecting the dynamic clamp block and reducing the possibility of it being scratched by the outside. In addition, the dynamic clamp block can be directly unscrewed from the piston rod through the connecting thread, thereby facilitating the installation and disassembly of the dynamic clamp block. The height adjustment device can adjust the clamping height of the workpiece according to the processing needs, thereby improving the practicality of the device.

[0004] When clamping a mechanical workpiece, this device may damage the workpiece surface due to excessive local pressure, resulting in a decrease in workpiece quality. In addition, in some situations requiring high-precision processing, the clamping action of the clamp may cause slight displacement and vibration of the workpiece, which is unacceptable for processes requiring extremely high processing precision. In view of this, we propose a pneumatic clamp for mechanical equipment to improve this device. Utility Model Content

[0005] The main purpose of the present invention is to provide a pneumatic clamp for mechanical equipment, which can effectively solve the above-mentioned problems.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A pneumatic clamp for mechanical equipment includes a connecting piece, a shell is fixedly installed through the middle of the bottom end of the connecting piece, four reinforcing brackets are installed in a rectangular array between the connecting piece and the shell, an electric cylinder is fixedly installed in the bottom wall of the shell cavity for protection, the output shaft of the electric cylinder passes through the bottom wall of the shell cavity and is fixedly connected to a connecting shaft through a coupling, a clamping device is provided on the upper side of the outer surface of the connecting shaft, and a suction cup assembly is installed at the bottom end of the connecting shaft.

[0008] Preferably, the clamping device includes a fixing ring and two articulated seats three, the fixing ring is fixedly installed on the upper side of the outer surface of the connecting shaft, two articulated seats one are symmetrically installed on the outer surface of the fixing ring, two L-shaped rods are respectively hingedly installed on the two articulated seats one, and two articulated seats two are respectively fixedly installed on the top ends of the two L-shaped rods along their horizontal directions.

[0009] Preferably, the two articulated seats three are respectively installed on the lower side of the shell at both ends along its height direction, and two articulated rods are respectively hingedly installed on the two articulated seats three, and the end faces of the two articulated rods away from the two articulated seats three are respectively hinged to the two articulated seats two.

[0010] Preferably, two clamps are respectively provided between the opposite surfaces of the two L-shaped rods along their vertical direction, and penetrating threaded holes are provided on the opposite surfaces of the two clamps and the two L-shaped rods, and the L-shaped rods and the clamps located on the same side are connected by bolt threads.

[0011] Preferably, two hidden holes aligned with the axes of the two threaded holes are respectively opened on the opposite surfaces of the two clamps, and the circumferential size and thickness of the two hidden holes are both larger than the maximum circumferential size and thickness of the two bolts.

[0012] Preferably, the suction cup assembly includes a connecting seat and four springs, the connecting seat is fixedly installed at the bottom end of the connecting shaft, four tubes are installed in a rectangular array through the bottom end of the connecting seat, four mounting seats are fixedly installed on the top ends of the four tubes, the bottom ends of the four tubes are all open, four through holes are respectively opened on the top walls of the inner cavities of the four tubes, and four rubber skirts are respectively glued and installed on the bottom ends of the four tubes.

[0013] Preferably, four electromagnetic lock bodies are respectively installed through the middle of the top wall of the inner cavity of the four mounting seats, and a rectangular array of penetrating air holes is opened at the top of the four mounting seats away from the axis center. Four limiting rings are respectively installed on the lower side of the inner cavity of the four tube bodies, and four pistons are respectively slidably installed on the surface of the inner cavity of the four tube bodies. Four armatures adapted to the four through holes are respectively fixedly installed on the top of the four pistons, and four support rods are respectively fixedly installed on the bottom ends of the four pistons. The outer wall diameter of the four pistons is larger than the inner wall diameter of the four limiting rings, and the head and tail ends of the four springs are respectively held between the top wall of the four tube bodies and the four pistons.

[0014] Compared with the prior art, the present invention has the following beneficial effects: in the present invention, an electric cylinder is set to drive the suction cup assembly to suck the workpiece downward with negative pressure, and when the electric cylinder drives the suction cup assembly to suck the workpiece downward, it drives the clamping device to clamp the workpiece. In this way, when clamping the workpiece, the electric cylinder can share part of the weight of the workpiece through the cooperation between the electric cylinder and the suction cup assembly, avoiding damage to the workpiece caused by excessive clamping force of the suction cup assembly. At the same time, the suction cup assembly prevents the workpiece from shaking during the clamping process, ensuring that the workpiece always remains stable during the entire operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the connecting piece and the electric cylinder in the present invention;

[0017] Figure 3 It is a schematic diagram of a partial cross-sectional structure of the clamping assembly in the present utility model;

[0018] Figure 4 This is a schematic diagram of the side elevation structure of the suction cup assembly in the present invention;

[0019] Figure 5 It is a schematic cross-sectional structural diagram of the suction cup assembly in the present invention.

[0020] In the figure: 1. Connecting part; 11. Reinforcement bracket; 2. Shell; 3. Electric cylinder; 4. Suction cup assembly; 41. Connecting seat; 42. Tube body; 421. Through hole; 422. Limiting ring; 43. Mounting seat; 44. Electromagnetic lock body; 441. Air hole; 45. Piston; 451. Support rod; 452. Armature; 46. Rubber skirt; 47. Spring; 6. Clamping device; 61. Fixing ring; 62. Articulated seat 1; 63. L-shaped rod; 64. Articulated seat 2; 65. Articulated rod; 66. Articulated seat 3; 67. Clamp; 671. Threaded hole; 672. Hidden hole; 673. Bolt; 7. Connecting shaft. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figure 1-Figure 5 As shown, it includes a connecting member 1, a housing 2 is fixedly installed through the middle of the bottom end of the connecting member 1, four reinforcing brackets 11 are installed in a rectangular array between the connecting member 1 and the housing 2, an electric cylinder 3 is fixedly installed in the bottom wall of the inner cavity of the housing 2 for protection, the output shaft of the electric cylinder 3 passes through the bottom wall of the inner cavity of the housing 2 and is fixedly connected to a connecting shaft 7 through a coupling, a clamping device 6 is provided on the upper side of the outer surface of the connecting shaft 7, and a suction cup assembly 4 is installed at the bottom end of the connecting shaft 7;

[0023] During the implementation of this solution, it is first necessary to connect the connecting part 1 to the output end of a mobile device such as a robotic arm or a crane, and set the electric cylinder 3 to drive the suction cup assembly 4 downward to suck the workpiece with negative pressure. When the electric cylinder 3 drives the suction cup assembly 4 downward to suck the workpiece, it drives the clamping device 6 to clamp the workpiece. In this way, the workpiece is clamped by cooperating with the electric cylinder 3 and the suction cup assembly 4, avoiding damage to the workpiece surface caused by excessive clamping force of the clamping device 6, and avoiding unnecessary shaking of the workpiece when clamping the moving workpiece.

[0024] Specifically, the clamping device 6 includes a fixing ring 61 and two hinged seats 3 66. The fixing ring 61 is fixedly mounted on the upper side of the outer surface of the connecting shaft 7. Two hinged seats 1 62 are symmetrically mounted on the outer surface of the fixing ring 61. Two L-shaped rods 63 are hingedly mounted on the two hinged seats 1 62. Two hinged seats 2 64 are fixedly mounted on the top ends of the two L-shaped rods 63 in the horizontal direction.

[0025] The two hinged seats 3 66 are respectively mounted on the lower sides of the housing 2 along the height direction of the housing 2. The two hinged seats 3 66 are respectively hingedly mounted with two hinged rods 65. The end surfaces of the two hinged rods 65 away from the two hinged seats 3 66 are respectively hinged to the two hinged seats 2 64.

[0026] When the electric cylinder 3 is started, the electric cylinder 3 drives the connecting shaft 7 downward, which in turn drives the fixing ring 61 downward. At the same time, when the fixing ring 61 moves downward, the two L-shaped rods 63 hingedly installed on both sides rotate downward with the two hinge seats 66 as the axis. In this way, when the bottom ends of the two L-shaped rods 63 approach each other, the two clamps 67 installed on the opposite surfaces of the bottom ends of the two L-shaped rods 63 approach each other, thereby clamping the workpiece.

[0027] Furthermore, two clamps 67 are respectively provided between the vertically facing surfaces of the two L-shaped rods 63. Penetrating threaded holes 671 are provided on the facing surfaces of the two clamps 67 and the two L-shaped rods 63. The L-shaped rods 63 and the clamps 67 on the same side are threadedly connected by bolts 673.

[0028] Two hidden holes 672 are respectively formed on the opposite surfaces of the two clamps 67 and aligned with the axes of the two threaded holes 671. The circumference and thickness of the two hidden holes 672 are both larger than the maximum circumference and thickness of the two bolts 673.

[0029] The two clamps 67 are respectively connected to the two L-shaped rods 63 by two bolts 673 through threads, so that different clamps 67 can be replaced according to work needs to meet the clamping of workpieces of different shapes. Two hidden holes 672 are respectively provided on the opposite surfaces of the two clamps 67. The circumferential size and thickness of the two hidden holes 672 are both larger than the circumferential size and thickness of the two bolts 673. In this way, when the two bolts 673 are installed, the two bolts 673 are prevented from protruding from the opposite surfaces of the two clamps 67, effectively preventing the workpiece from being damaged due to the protrusion of the two bolts 673 when the two clamps 67 clamp the workpiece.

[0030] Specifically, the suction cup assembly 4 includes a connecting seat 41 and four springs 47. The connecting seat 41 is fixedly mounted on the bottom end of the connecting shaft 7. Four tubes 42 are installed in a rectangular array through the bottom end of the connecting seat 41. Four mounting seats 43 are fixedly installed on the top ends of the four tubes 42. The bottom ends of the four tubes 42 are all open. Four through holes 421 are respectively opened on the top walls of the inner cavities of the four tubes 42. Four rubber skirts 46 are glued and installed on the bottom ends of the four tubes 42.

[0031] Four electromagnetic lock bodies 44 are respectively installed through the middle of the top wall of the inner cavity of the four mounting seats 43. A rectangular array of penetrating air holes 441 is opened at the top of the four mounting seats 43 away from the axis thereof. Four limiting rings 422 are respectively installed on the lower side of the inner cavity of the four tube bodies 42. Four pistons 45 are respectively slidably installed on the inner cavity surface of the four tube bodies 42. Four armatures 452 adapted to the four through holes 421 are respectively fixedly installed on the top of the four pistons 45. Four support rods 451 are respectively fixedly installed on the bottom end of the four pistons 45. The outer wall diameter of the four pistons 45 is larger than the inner wall diameter of the four limiting rings 422. The head and tail ends of the four springs 47 are respectively held between the top wall of the inner cavity of the four tube bodies 42 and the four pistons 45.

[0032] When the electric cylinder 3 drives the connecting shaft 7 downward, it also drives the connecting seat 41 downward. When the connecting seat 41 moves downward, the support rod 451 first contacts the upper surface of the workpiece. As the connecting seat 41 continues to move downward, the support rod 451 pushes the piston 45 upward to make it slide upward along the inner cavity of the tube body 42. When the rubber skirt 46 at the bottom end of the tube body 42 contacts the upper surface of the workpiece, the lower space of the inner cavity of the tube body 42 and the workpiece form a closed space. As the piston 45 continues to rise, negative pressure is formed in the closed space, so that the tube body 42 and the upper surface of the workpiece are attracted by the negative pressure.

[0033] When the piston 45 rises to the highest position, the armature 452 at its top passes through the through hole 421 and is firmly attracted by the magnetic end of the electromagnetic lock body 44, thereby preventing the piston 45 from sliding down unnecessarily and causing the tube body 42 to be unable to attract the workpiece under negative pressure.

[0034] The electromagnetic lock body 44 in this solution belongs to the existing technology, and its model is: TL-EML200. It can be opened and closed by remote control during actual use. When the electromagnetic lock body 44 is started, it is electromagnetically attracted to the armature 452. Conversely, when the electromagnetic lock body 44 is closed, the electromagnetic attraction effect with the armature 452 is released. At this time, the tension of the spring 47 pushes the piston 45 to reset, so as to facilitate the next work.

[0035] It should be noted that the specific installation method, circuit connection method and control method of the electric cylinder 3 and the electromagnetic lock body 44 used in the present invention are all conventional designs and will not be elaborated in detail in the present invention.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic clamp for mechanical equipment, comprising a connecting piece (1), characterized in that: A housing (2) is fixedly installed through the middle of the bottom end of the connecting member (1), four reinforcing brackets (11) are installed in a rectangular array between the connecting member (1) and the housing (2), an electric cylinder (3) is fixedly installed in the bottom wall of the inner cavity of the housing (2), the output shaft of the electric cylinder (3) passes through the bottom wall of the inner cavity of the housing (2) and is fixedly connected to a connecting shaft (7) through a coupling, a clamping device (6) is provided on the upper side of the outer surface of the connecting shaft (7), and a suction cup assembly (4) is installed at the bottom end of the connecting shaft (7).

2. A pneumatic clamp for mechanical equipment according to claim 1, characterized in that: The clamping device (6) includes a fixing ring (61) and two hinged seats (66). The fixing ring (61) is fixedly mounted on the upper side of the outer surface of the connecting shaft (7). Two hinged seats (62) are symmetrically mounted on the outer surface of the fixing ring (61). Two L-shaped rods (63) are hingedly mounted on the two hinged seats (62). Two hinged seats (64) are fixedly mounted on the top ends of the two L-shaped rods (63) along the horizontal direction.

3. A pneumatic clamp for mechanical equipment according to claim 2, characterized in that: The two hinged seats (3) (66) are respectively mounted on the lower sides of the housing (2) at both ends in the height direction thereof, and two hinged rods (65) are respectively hingedly mounted on the two hinged seats (3) (66), and the end surfaces of the two hinged rods (65) away from the two hinged seats (3) (66) are respectively hingedly connected to the two hinged seats (2) (64).

4. A pneumatic clamp for mechanical equipment according to claim 3, characterized in that: Two clamps (67) are respectively provided between the opposite surfaces of the two L-shaped rods (63) along the vertical direction thereof. Penetrating threaded holes (671) are provided on the opposite surfaces of the two clamps (67) and the two L-shaped rods (63). The L-shaped rods (63) and the clamps (67) on the same side are threadedly connected by bolts (673).

5. The pneumatic clamp for mechanical equipment according to claim 4, characterized in that: Two hidden holes (672) aligned with the axes of the two threaded holes (671) are respectively provided on the opposite surfaces of the two clamps (67), and the circumferential dimensions and thicknesses of the two hidden holes (672) are both greater than the maximum circumferential dimensions and thicknesses of the two bolts (673).

6. The pneumatic clamp for mechanical equipment according to claim 1, characterized in that: The suction cup assembly (4) comprises a connecting seat (41) and four springs (47). The connecting seat (41) is fixedly mounted on the bottom end of the connecting shaft (7). Four tubes (42) are installed in a rectangular array through the bottom end of the connecting seat (41). Four mounting seats (43) are fixedly installed on the top ends of the four tubes (42). The bottom ends of the four tubes (42) are all open. Four through holes (421) are respectively opened on the top walls of the inner cavities of the four tubes (42). Four rubber skirts (46) are respectively glued and installed on the bottom ends of the four tubes (42).

7. The pneumatic clamp for mechanical equipment according to claim 6, characterized in that: Four electromagnetic lock bodies (44) are respectively installed through the middle of the top wall of the inner cavity of the four mounting seats (43), and a rectangular array of penetrating air holes (441) is opened at the top of the four mounting seats (43) away from the axis thereof. Four limiting rings (422) are respectively installed on the lower side of the inner cavity of the four tube bodies (42), and four pistons (45) are respectively slidably installed on the inner cavity surface of the four tube bodies (42). Four armatures (452) adapted to the four through holes (421) are respectively fixedly installed on the top of the four pistons (45), and four support rods (451) are respectively fixedly installed on the bottom ends of the four pistons (45). The outer wall diameter of the four pistons (45) is larger than the inner wall diameter of the four limiting rings (422), and the head and tail ends of the four springs (47) are respectively supported between the top wall of the inner cavity of the four tube bodies (42) and the four pistons (45).

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