Pneumatic clamp

Abstract

The pneumatic clamp comprises a cylinder body, a first side face and a second side face, the first side face and the second side face are opposite to each other, the first side face is provided with a first air inlet and a second air inlet, and a piston body comprises a first piston parallel to the first side face, a second piston parallel to the second side face and a connecting body connecting the first piston and the second piston. When air enters the first air inlet, the first piston and the sliding blocks get close to each other, when air enters the second air inlet, the second piston and the sliding blocks get away from each other, in the process that the sliding blocks get close to or get away from each other, the positioning pins move in the guide grooves, at least one guide groove is obliquely arranged, and the value range of the inclination angle of the guide grooves is (0, pi / 2). According to the utility model, the original mode of driving the piston up and down is changed, and the piston is driven by the left side surface and the right side surface, so that the design space of the piston is increased in a disguised manner, the size of the piston is correspondingly enlarged, the acting area of the piston is greatly increased, and the acting force on the piston is further increased.

Description

Technical Field

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

[0002] When driving the slider to move, the existing two-jaw pneumatic clamp or two-jaw pneumatic manipulator generally sets a slider in the cylinder body to cooperate with the piston to move, but the force applied to the piston is up and down. For example, the Chinese patent with patent publication number CN217842198U discloses a translational clamping cylinder, the movement direction of the piston is the height direction of the cylinder body, and due to the space limitation inside the cylinder body, the size of the piston cannot be made very large, so the force acting on the piston will be limited, thereby causing the clamping force to be limited. Summary of the invention

[0003] The purpose of the utility model is to provide a pneumatic clamp to solve the above technical problems.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A pneumatic clamp, characterized in that it includes a cylinder body, the cylinder body has a first side surface and a second side surface opposite to each other, the first side surface is provided with a first air inlet and a second air inlet, a piston body is provided in the cylinder body, the piston body includes a first piston arranged in parallel with the first side surface, a second piston arranged in parallel with the second side surface, and a connecting body connecting the first piston and the second piston, an accommodation space is formed between the first piston, the second piston and the connecting body, a guide plate is installed in the accommodation space, the guide plate is fixed on the connecting body and moves with the piston body, a slideway is formed in the cylinder body, a slider is provided in the slideway, the slider is distributed at both ends of the cylinder body, a positioning pin is provided on the side of the slider facing the guide plate, a guide groove is provided on the guide plate, the positioning pin extends into the guide groove, the first air inlet acts on the first piston when air is inhaled, and the sliders are close to each other, the second air inlet acts on the second piston when air is inhaled, and the sliders are away from each other, and in the process of the slider approaching or moving away, the positioning pin moves in the guide groove, at least one of the guide grooves is inclined, and the value range of the guide groove inclination angle is (0, π / 2).

[0006] The utility model is further arranged that when the two guide grooves are arranged obliquely, the guide grooves are symmetrically distributed.

[0007] The utility model is further arranged that the first piston and the second piston are provided with spring grooves, and springs are arranged in the spring grooves.

[0008] The utility model is further arranged that the cylinder body includes a first cylinder body and a second cylinder body, the first side surface is formed on the first cylinder body, the second side surface is formed on the second cylinder body, an opening is formed on the first piston and / or the second piston, a sliding pin is provided on the inner side surface of the first cylinder body and / or the second cylinder body, one end of the sliding pin is fixed on the inner side surface of the first cylinder body and / or the second cylinder body, and the other end extends into the opening, and the first piston and / or the second piston are guided by the sliding pin when moving.

[0009] The utility model is further arranged that a sealing plate covering the slide is arranged between the sliders, a sliding groove is formed on one side of the slider facing the sealing plate, both ends of the sealing plate are located in the slide groove, and when the slider moves in the sliding groove, the slider moves along the sealing plate.

[0010] The utility model is further arranged that a proximity switch mounting groove is formed on the first cylinder body and the second cylinder body on the sliding-out side of the slider, a proximity switch is arranged in the proximity switch mounting groove, and corresponding sensing strips are arranged on both sides of the slider, the sensing strips move synchronously with the slider, and the position of the slider is detected by the proximity switch.

[0011] The utility model is further provided that the side surfaces of the first piston and the second piston are formed with an annular embedding groove, and a sealing ring is arranged in the annular embedding groove.

[0012] The utility model is further configured that the first piston, the second piston and the connecting body are integrally formed.

[0013] The utility model is further arranged that a first flow channel communicating with the first air inlet and a second flow channel communicating with the second air inlet are formed on the cylinder body.

[0014] The utility model is further arranged that a fixing piece for fixing the proximity switch is arranged outside the proximity switch installation groove, and the fixing piece is fixed to the first cylinder body and the second cylinder body through a fastener.

[0015] The beneficial effects of the utility model are as follows: the utility model changes the original way of driving the piston up and down, and adopts the way of driving the piston from the left and right sides, which in disguise increases the design space of the piston, enlarges the size of the piston accordingly, thereby greatly increasing the action area of ​​the piston, and then increasing the action force received by the piston. When the action force received by the piston increases, after the slider is installed with the clamping claw, the clamping force between the clamping claws also increases accordingly. In addition, while the piston is driven by the way of driving the piston from the left and right sides, the linkage mode between the slider is also modified to a certain extent. By arranging a guide plate in the placement space and arranging a corresponding inclined guide groove in the guide plate, the piston body drives the slider to move along the guide groove during the movement, and the inclination angle affects the size of the clamping force, thereby further increasing the clamping force, meeting the demand of clamping the workpiece with great force, and ensuring the reliability and stability of the clamping claw in the process of grabbing the material. Specifically, the inclination angle affects the stroke of the slider. The smaller the inclination angle, the longer its stroke. Secondly, the inclination angle also affects the clamping force to a certain extent. The smaller the inclination angle, the smaller the clamping force. According to the demand of the clamping force and the stroke, guide grooves with different inclination angles can be set. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 Schematic diagram of the explosion of the embodiment of the utility model Figure 1 .

[0018] Figure 2 It is a three-dimensional diagram of an embodiment of the utility model.

[0019] Figure 3 It is a top view of an embodiment of the utility model.

[0020] Figure 4 for Figure 3 Cross-sectional view at AA in the middle.

[0021] Figure 5 Schematic diagram of the explosion of the embodiment of the utility model Figure 2 .

[0022] Figure 6 It is a side view of an embodiment of the utility model.

[0023] Figure 7 for Figure 6 Cross-sectional view at CC.

[0024] Figure 8 for Figure 6 Cross-sectional view at the middle BB.

[0025] Fig. 9 This is a schematic diagram of the structure of Example 2 of the utility model.

[0026] Fig.10 This is a schematic diagram of the structure of Example 3 of the utility model.

[0027] Reference numerals:

[0028] 10. First cylinder body; 101. First side surface; 20. Second cylinder body; 201. Second side surface; 30. First air inlet; 40. Second air inlet; 50. First piston; 60. Second piston; 70. Connector; 80. Placement space; 90. Guide plate; 90a. Guide groove; 100. Slideway; 110. Positioning pin; 120. First flow channel; 130. Second flow channel; 140. Spring groove; 150. Spring; 160. Opening; 170. Sliding pin; 180. Closing plate; 190. Sliding groove; 200. Proximity switch mounting groove; 210. Proximity switch; 220. Induction strip; 230. Fixing piece; 240. Annular embedding groove; 250. Sealing ring; 260. Gas outlet; 270. Sliding block; DETAILED DESCRIPTION

[0029] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0030] like Figure 1-8As shown, the utility model is a pneumatic clamp, including a cylinder body, the cylinder body has a first side surface 101 and a second side surface 201 opposite to each other, the first side surface 101 is provided with a first air inlet 30 and a second air inlet 40, a piston body is provided in the cylinder body, the piston body includes a first piston 50 arranged in parallel with the first side surface 101, a second piston 60 arranged in parallel with the second side surface 201, and a connecting body 70 connecting the first piston 50 and the second piston 60, an accommodation space 80 is formed between the first piston 50, the second piston 60 and the connecting body 70, a guide plate 90 is installed in the accommodation space 80, the guide plate 90 is fixed on the connecting body 70 and moves with the piston body, and a slideway 1 is formed in the cylinder body. 00, a slider 270 is provided in the slideway 100, and the sliders 270 are distributed at both ends of the cylinder body. A positioning pin 110 is provided on the side of the slider 270 facing the guide plate 90, and a guide groove 90a is provided on the guide plate 90. The positioning pin 110 extends into the guide groove 90a. When the first air inlet 30 is intaken, it acts on the first piston 50, and the sliders 270 are close to each other. When the second air inlet 40 is intaken, it acts on the second piston 60, and the sliders 270 are away from each other. In the process of the slider 270 approaching or moving away, the positioning pin 110 moves in the guide groove 90a. At least one guide groove 90a is inclined, and the value range of the inclination angle of the guide groove 90a is (0, π / 2).

[0031] In addition, a first flow channel 120 communicating with the first air inlet 30 and a second flow channel 130 communicating with the second air inlet 40 are formed on the cylinder body. Taking the first air inlet 30 and the second air inlet 40 formed on the first cylinder body 10 as an example, the first flow channel 120 extends from the first cylinder body 10 to the second cylinder body 20, and a gas outlet 260 is formed on the second cylinder body 20 to enter the piston chamber in the second cylinder body 20, and the gas acts on the first piston 50 located in the second cylinder body 20. The first cylinder body 10 is also provided with a gas outlet 260, which directs the gas of the second air inlet 40 to flow to the piston chamber in the first cylinder body 10 and acts on the second piston 60.

[0032] Now the specific embodiments are described:

[0033] Embodiment 1:

[0034] like Figure 1 , Figure 5 As shown, in this embodiment, both guide grooves 90a are inclined, and the guide grooves 90a are symmetrically distributed. The ends of the guide grooves 90a that are close to each other are the proximal ends, and the ends that are far away from each other are the distal ends. When the positioning pin 110 is located at the proximal end, the sliders 270 are close to each other and are in a clamped state. When the positioning pin 110 is located at the distal end, the sliders 270 are far away from each other and are in an unclamped state. In addition, the inclination angle of the guide groove 90a is the angle between the distal end or the proximal end and the length direction of the guide plate 90, which is recorded as α. In this embodiment, α=π / 9.

[0035] Embodiment 2:

[0036] like Fig. 9 As shown, the difference between this embodiment and embodiment 1 is that the angle of α is different. In this embodiment, the angle of α is α=π / 6

[0037] Embodiment 3:

[0038] like Fig.10 As shown, in this embodiment, only one guide groove 90a is inclined, and the setting direction of the other guide groove 90a is consistent with the width direction of the guide plate 90 and is in a non-inclined state.

[0039] Based on Example 1, Example 2 and Example 3, continue to refer to Figure 1-Figure 8 In the utility model, a spring 150 groove 140 is opened on the first piston 50 and the second piston 60, and a spring 150 is arranged in the spring 150 groove 140. The other end of the spring 150 is against the inner side surface of the first cylinder body 10 and the second cylinder body 20, and provides a force when the first piston 50 and the second piston 60 just start to move, so that the piston body can move in time.

[0040] The cylinder body in the utility model includes a first cylinder body 10 and a second cylinder body 20, the first cylinder body 10 and the second cylinder body 20 are fixedly connected, wherein the first side surface 101 is formed on the first cylinder body 10, the second side surface 201 is formed on the second cylinder body 20, an opening 160 is formed on the first piston 50 and / or the second piston 60, and a sliding pin 170 is provided on the inner side surface of the first cylinder body 10 and / or the second cylinder body 20, one end of the sliding pin 170 is fixed on the inner side surface of the first cylinder body 10 and / or the second cylinder body 20, and the other end extends into the opening 160, and the first piston 50 and / or the second piston 60 are guided by the sliding pin 170 when moving.

[0041] In the above scheme, the sliding pin 170 and the opening 160 are arranged as a set. The sliding pin 170 can be formed only on the inner side of the first cylinder body 10 and the opening 160 can be formed on the first piston 50 to provide a certain guidance for the piston body when it moves; the above structure is also set on the second cylinder body 20 and the second piston 60; the corresponding structures can also be set on the first cylinder body 10, the second cylinder body 20, the first piston 50 and the second piston 60 at the same time.

[0042] In the utility model, a sealing plate 180 covering the slide 100 is arranged between the sliders 270, and a sliding groove 190 is formed on the side of the slider 270 facing the sealing plate 180. Both ends of the sealing plate 180 are located in the groove of the slide 100. When the slider 270 moves, the slider 270 moves along the sealing plate 180. The function of the sealing plate 180 is to cover the part of the slide 100 that the slider 270 cannot cover, and when the slider 270 moves, the sliding groove 190 and the sealing plate 180 cooperate to ensure the stability of the movement of the slider 270 and provide guidance.

[0043] In the utility model, the sliding side of the slider 270 is formed with a proximity switch 210 mounting groove 200 on the first cylinder body 10 and the second cylinder body 20. The proximity switch 210 is arranged in the proximity switch 210 mounting groove 200. The corresponding two sides of the slider 270 are provided with sensing strips 220. The sensing strips 220 move synchronously with the slider 270 and detect the position of the slider 270 through the proximity switch 210. A fixing member 230 for fixing the proximity switch 210 is arranged outside the proximity switch 210 mounting groove 200. The fixing member 230 is fixed to the first cylinder body 10 and the second cylinder body 20 by fasteners. The fixing member 230 is formed with notches on both sides of the fixing member 230 to form a closed groove with the wiring switch mounting groove.

[0044] In the present invention, an annular embedding groove 240 is formed on the side of the first piston 50 and the second piston 60. A sealing ring 250 is arranged in the annular embedding groove 240. The sealing ring 250 is arranged to ensure the sealing performance of the piston.

[0045] In the present invention, the first piston 50, the second piston 60 and the connecting body 70 may be integrally formed or fixedly connected by fasteners.

[0046] The utility model changes the original way of driving the piston up and down, and adopts the way of driving the piston from the left and right sides, which in disguise increases the design space of the piston, enlarges the size of the piston accordingly, thereby greatly increasing the effective area of ​​the piston, and then increasing the force exerted on the piston. When the force exerted on the piston increases, after the slider 270 is installed with the clamping jaws, the clamping force between the clamping jaws also increases accordingly. In addition, while the piston is driven by the way of driving the piston from the left and right sides, the linkage mode between the slider 270 is also modified to a certain extent. By setting a guide plate 90 in the placement space 80 and setting a corresponding inclined guide groove 90a in the guide plate 90, the piston body drives the slider 270 to move along the guide groove 90a during the movement, and the inclination angle affects the size of the clamping force, thereby further increasing the clamping force, meeting the demand for strong clamping of the workpiece, and ensuring the reliability and stability of the clamping jaws in the process of grabbing the material. Specifically, the inclination angle affects the stroke of the slider. The smaller the inclination angle, the longer its stroke. Secondly, the inclination angle also affects the clamping force to a certain extent. The smaller the inclination angle, the smaller the clamping force. According to the requirements of the clamping force and the stroke, guide grooves with different inclination angles can be set.

[0047] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0048] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0049] The above description shows and describes several preferred embodiments of the utility model, but as before, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention and creation of this article through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A pneumatic clamp, characterized in that: The invention comprises a cylinder body, wherein the cylinder body has a first side surface and a second side surface opposite to each other, the first side surface is provided with a first air inlet and a second air inlet, a piston body is provided in the cylinder body, the piston body comprises a first piston arranged in parallel with the first side surface, a second piston arranged in parallel with the second side surface, and a connecting body connecting the first piston and the second piston, an accommodation space is formed between the first piston, the second piston and the connecting body, a guide plate is installed in the accommodation space, the guide plate is fixed on the connecting body and moves with the piston body, a slideway is formed in the cylinder body, a slider is provided in the slideway, the slider is distributed at both ends of the cylinder body, a positioning pin is provided on the side of the slider facing the guide plate, a guide groove is provided on the guide plate, the positioning pin extends into the guide groove, the first air inlet acts on the first piston when air is inhaled, and the sliders are close to each other, the second air inlet acts on the second piston when air is inhaled, and the sliders are away from each other, and in the process of the sliders approaching or moving away, the positioning pin moves in the guide groove, and at least one of the guide grooves is inclined.

2. A pneumatic clamp according to claim 1, characterized in that: When both guide grooves are inclined, the guide grooves are symmetrically distributed.

3. A pneumatic clamp as claimed in claim 2, characterized in that: The value range of the guide groove inclination angle is (0, π / 2).

4. A pneumatic clamp as claimed in claim 1, characterized in that: The first piston and the second piston are provided with spring grooves, and springs are arranged in the spring grooves.

5. A pneumatic clamp as claimed in claim 1, characterized in that: The cylinder body includes a first cylinder body and a second cylinder body, the first side surface is formed on the first cylinder body, the second side surface is formed on the second cylinder body, an opening is formed on the first piston and / or the second piston, a sliding pin is provided on the inner side surface of the first cylinder body and / or the second cylinder body, one end of the sliding pin is fixed on the inner side surface of the first cylinder body and / or the second cylinder body, and the other end extends into the opening, and the first piston and / or the second piston are guided by the sliding pin when moving.

6. A pneumatic clamp as claimed in claim 1, characterized in that: A sealing plate covering the slideway is arranged between the sliders, a sliding groove is formed on one side of the slider facing the sealing plate, both ends of the sealing plate are located in the slideway groove, and when the slider moves in the sliding groove, the slider moves along the sealing plate.

7. A pneumatic clamp as claimed in claim 4, characterized in that: A proximity switch mounting groove is formed on the sliding-out side of the slider on the first cylinder body and the second cylinder body, and a proximity switch is arranged in the proximity switch mounting groove. Correspondingly, sensing strips are arranged on both sides of the slider, and the sensing strips move synchronously with the slider and detect the position of the slider through the proximity switch.

8. A pneumatic clamp as claimed in claim 1, characterized in that: Annular embedding grooves are formed on the side surfaces of the first piston and the second piston, and sealing rings are arranged in the annular embedding grooves.

9. A pneumatic clamp as claimed in claim 1, characterized in that: The cylinder body is formed with a first flow channel communicating with the first air inlet and a second flow channel communicating with the second air inlet.

10. A pneumatic clamp as claimed in claim 7, characterized in that: A fixing piece for fixing the proximity switch is arranged outside the proximity switch installation groove, and the fixing piece is fixed to the first cylinder body and the second cylinder body through a fastener.

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