Automatic clamping device

Abstract

The utility model belongs to the technical field of automation equipment, and particularly relates to an automatic clamping device which comprises an upper clamping mechanism, a conveying assembly, a detection module and a lower clamping mechanism which are sequentially arranged from top to bottom. The hydraulic valve plate is attached to the detection module in a sealed mode through the upper clamping mechanism and the lower clamping mechanism, the conveying assembly comprises a conveying rack and a tray, the conveying rack is used for conveying the tray, the tray is used for loading the hydraulic valve plate, the upper clamping mechanism comprises an upper mounting plate, and a downward pressing assembly is arranged in the middle of the upper mounting plate. The lower clamping mechanism comprises a lower mounting plate, the lower mounting plate is provided with a positioning assembly, a jacking assembly and a lower limiting assembly, the positioning assembly is used for positioning the tray, the jacking assembly is used for pushing the detection module, and the lower limiting assembly is used for limiting the lower pressing end of the jacking assembly. The lower limiting assembly is used for limiting the jacking end of the jacking assembly. The device improves the test reliability, and is suitable for batch tests.

Description

Technical Field

[0001] This utility model belongs to the field of automation equipment technology, and in particular relates to an automatic clamping device. Background Technology

[0002] With the development of hydraulic technology, plate-type hydraulic valves have been widely used in many fields. Plate-type hydraulic valves include directional control valves, flow control valves, and pressure control valves. They can be manually adjusted locally or remotely electrically controlled, and are one of the important components of hydraulic systems. Plate-type hydraulic valves are generally fixed to a mounting plate with screws, ensuring a sealed end face.

[0003] The current production and testing process for automotive hydraulic valve plates requires assembly and testing. During testing, the hydraulic valve plate needs to be connected to a testing module. Hydraulic oil is input into the valve plate through the testing module, and a control strategy is used to control the opening and closing of the hydraulic channels within the valve plate to achieve changes in the pressure and flow rate of the oil at different outlets. The hydraulic oil is then delivered to the corresponding sensors through the testing module's pipeline to detect parameters such as pressure and flow rate in the oil channels within the valve plate, verifying whether it meets performance requirements. However, the traditional method involves manually tightening bolts to fix the valve on the test bench. During testing, each valve requires operators to install and remove each bolt, which is not only time-consuming but also labor-intensive. This method is time-consuming and labor-intensive and cannot meet the needs of mass production. Utility Model Content

[0004] The purpose of this invention is to provide an automatic clamping device to solve the problems existing in the prior art.

[0005] To achieve the above objectives, this utility model provides an automatic clamping device, comprising an upper clamping mechanism, a conveying assembly, a detection module, and a lower clamping mechanism arranged sequentially from top to bottom; a hydraulic valve plate is sealed and fitted to the detection module through the upper clamping mechanism and the lower clamping mechanism; the conveying assembly includes a conveying platform and a tray, the conveying platform being used to convey the tray, and the tray being used to load the hydraulic valve plate; the upper clamping mechanism includes an upper mounting plate, a pressing assembly being disposed in the middle of the upper mounting plate, and an upper limit assembly being mounted on the side of the upper mounting plate near the tray, the upper limit assembly being used to limit the pressing end of the pressing assembly; the lower clamping mechanism includes a lower mounting plate, a positioning assembly, a lifting assembly, and a lower limit assembly being disposed on the lower mounting plate, the positioning assembly being used to position the tray, the lifting assembly being used to push the detection module, and the lower limit assembly being used to limit the lifting end of the lifting assembly.

[0006] Preferably, the positioning component includes a second hydraulic cylinder fixedly connected to the middle of the lower mounting plate, the output end of the second hydraulic cylinder is connected to a connecting plate, the top end of the connecting plate is connected to a plurality of positioning rods, and the tray is provided with positioning holes, the positioning holes being correspondingly provided with the positioning rods.

[0007] Preferably, the lifting assembly includes vertical plates vertically connected to both sides of the lower mounting plate, a lifting plate slidably connected between the vertical plates, a double-stage telescopic member installed on the lower mounting plate, one end of the double-stage telescopic member being connected to the lower mounting plate, and the other end of the double-stage telescopic member being connected to one end of the lifting plate.

[0008] Preferably, the dual-stage telescopic component includes a primary hydraulic cylinder and a secondary hydraulic cylinder. The output end of the primary hydraulic cylinder is connected to the top end of the lower mounting plate, the other end of the primary hydraulic cylinder is connected to the output end of the secondary hydraulic cylinder, and the other end of the secondary hydraulic cylinder is connected to the lifting plate.

[0009] Preferably, the lower limit assembly includes a support plate 1 symmetrically slidably connected to both sides of the lifting assembly. The top end of the support plate 1 is connected to a plurality of limit rods. The limit rods are in frictional contact with the bottom surface of the detection module. The support plate 1 is connected to the output end of a hydraulic cylinder 1, and the hydraulic cylinder 1 is connected to the lower mounting plate.

[0010] Preferably, two sets of slide rails are provided on both sides of the lower mounting plate, and both sets of slide rails are arranged along the transmission direction of the conveying platform. The pallet is slidably connected to the lower mounting plate through the slide rails.

[0011] Preferably, the pressing assembly includes a main hydraulic cylinder mounted on the upper mounting plate. The output end of the main hydraulic cylinder passes through the upper mounting plate and is connected to a pressure plate. The top end of the pressure plate is connected to one end of a plurality of sliding rods, and the other end of the sliding rods is slidably connected to the upper mounting plate.

[0012] Preferably, the upper limit assembly includes sliding plates symmetrically slidably connected to both sides of the pressure plate, with limit plates connected to the bottom ends of both sliding plates. The bottom ends of the limit plates are in frictional contact with the top end of the pressure plate. The output end of a hydraulic cylinder is connected to the sliding plate, and the hydraulic cylinder is connected to the bottom end of the upper mounting plate.

[0013] Compared with the prior art, the present invention has the following advantages and technical effects:

[0014] This utility model provides an automatic clamping device. In use, a pallet and a hydraulic valve plate are conveyed between a lower clamping mechanism and an upper clamping mechanism via a conveyor frame. The pallet is precisely positioned by a positioning component, and the detection module is lifted by a lifting component, so that the flow channel of the detection module is aligned with the flow channel of the hydraulic valve plate. The hydraulic valve plate is then pushed further to detach from the pallet, at which point the hydraulic valve plate is completely supported by the detection module. Subsequently, a pressing component actuates and presses against the upper surface of the hydraulic valve plate. The lifting component then continues to lift upward and makes fine adjustments to ensure that the flow channel of the hydraulic valve plate is tightly aligned with the flow channel of the detection module to prevent oil leakage during hydraulic testing. Finally, an upper limit component and a lower limit component actuate to limit the actuators of the pressing component and the lifting component, respectively, to achieve pressure holding.

[0015] This invention enables precise positioning, efficient testing, and stable pressure holding of hydraulic valve plates, thereby improving the accuracy and reliability of testing and enhancing the level of automation in testing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an automatic clamping device proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the lower clamping mechanism in this utility model;

[0019] Figure 3 This is a schematic diagram of the upper clamping mechanism in this utility model;

[0020] The components include: 1. Lower clamping mechanism; 2. Upper clamping mechanism; 3. Conveying assembly; 301. Conveying platform; 302. Pallet; 303. Positioning hole; 101. Lower mounting plate; 102. Primary hydraulic cylinder; 103. Secondary hydraulic cylinder; 104. Connecting plate; 105. Vertical plate; 106. Positioning rod; 107. Slide rail one; 108. Support plate one; 109. Hydraulic cylinder one; 110. Limiting rod; 111. 112. Slide rail 2; 113. Slider; 114. Lifting plate; 115. Hydraulic cylinder 2; 201. Pressure plate; 202. Limiting plate; 203. Hydraulic cylinder 3; 204. Slide plate; 205. Upper mounting plate; 206. Slide rail 3; 207. Slide rod; 208. Main hydraulic cylinder; 209. Piston rod; 4. Hydraulic valve plate; 5. Detection module; 501. Oil inlet; 502. Wiring port; 503. Oil outlet. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Reference Figures 1 to 3 As shown, this utility model provides an automatic clamping device, including an upper clamping mechanism 2, a conveying component 3, a detection module 5, and a lower clamping mechanism 1 arranged sequentially from top to bottom; the hydraulic valve plate 4 is sealed and fitted to the detection module 5 through the upper clamping mechanism 2 and the lower clamping mechanism 1; the conveying component 3 includes a conveying platform 301 and a tray 302, the conveying platform 301 is used to convey the tray 302, and the tray 302 is used to load the hydraulic valve plate 4; the upper clamping mechanism 2 includes an upper mounting plate 205, a pressing component is provided in the middle of the upper mounting plate 205, and an upper limit component is installed on the side of the upper mounting plate 205 near the tray 302, the upper limit component is used to limit the pressing end of the pressing component; the lower clamping mechanism 1 includes a lower mounting plate 101, a positioning component, a lifting component, and a lower limit component are provided on the lower mounting plate 101, the positioning component is used to position the tray 302, the lifting component is used to push the detection module 5, and the lower limit component is used to limit the lifting end of the lifting component.

[0024] In this embodiment, the pallet 302 is provided with a positioning block and a positioning pin. On the one hand, it facilitates the placement of the hydraulic valve plate 4 workpiece on the pallet 302. On the other hand, it limits the placement direction of the hydraulic valve plate 4. The positioning pin is matched with the process hole on the hydraulic valve plate 4 to prevent the operator from placing it incorrectly, thus having an anti-misplacement function.

[0025] The conveyor frame 301 is existing technology. It drives the transmission chain to rotate through the drive motor. The transmission chain is slidably set in the support cavity of the conveyor frame 301. The pulleys of the transmission chain reduce friction, and at the same time, the pulleys drag the tray 302 and the hydraulic valve plate 4 forward.

[0026] The detection module 5 is existing technology. The detection module 5 includes an oil block body with a flow channel inside. The upper flow channel opening matches the flow channel opening on the hydraulic valve plate 4. Corresponding sensor interfaces are provided on the side of the oil block body, which are connected to corresponding temperature, pressure, flow and other sensors. The wiring port 502 of the oil block body is connected to the detection host. The oil inlet 501 and oil outlet 503 on the oil block body are connected to the external oil pressure supply equipment through oil pipes.

[0027] In use, the pallet 302 and the hydraulic valve plate 4 are conveyed between the lower clamping mechanism 1 and the upper clamping mechanism 2 via the conveying platform 301. The pallet 302 is precisely positioned by the positioning component, and the detection module 5 is lifted by the lifting component, so that the flow channel of the detection module 5 is in contact with the flow channel of the hydraulic valve plate 4. The hydraulic valve plate 4 is then pushed further to disengage from the pallet 302. At this point, the hydraulic valve plate 4 is completely supported by the detection module 5. Then, the pressing component starts to operate and presses against the upper surface of the hydraulic valve plate 4. The lifting component then continues to lift upward and makes fine adjustments to ensure that the flow channel of the hydraulic valve plate 4 is tightly in contact with the flow channel of the detection module 5 to prevent oil leakage during hydraulic testing. Then, the upper limit component and the lower limit component start to operate, respectively limiting the execution ends of the pressing component and the lifting component to achieve pressure holding.

[0028] Furthermore, the positioning assembly includes a second hydraulic cylinder 114 fixedly connected to the middle of the lower mounting plate 101. The output end of the second hydraulic cylinder 114 is connected to a connecting plate 104. The top end of the connecting plate 104 is connected to a plurality of positioning rods 106. The tray 302 is provided with positioning holes 303, which are correspondingly provided with the positioning rods 106.

[0029] The hydraulic cylinder 114 is actuated to drive the pallet 302 and the positioning rod 106 to rise and pass through the positioning hole 303 to position the pallet 302, thereby achieving precise positioning of the hydraulic valve plate 4.

[0030] Furthermore, the lifting assembly includes vertical plates 105 vertically connected to both sides of the lower mounting plate 101, a lifting plate 113 slidably connected between the vertical plates 105, and a double-stage telescopic component installed on the lower mounting plate 101. One end of the double-stage telescopic component is connected to the lower mounting plate 101, and the other end of the double-stage telescopic component is connected to one end of the lifting plate 113.

[0031] In this embodiment, two slide rails 111 are arranged in parallel on the vertical plate 105. A slider 112 is slidably connected to the slide rails 111. The slider 112 is connected to the lifting plate 113, thereby ensuring the smooth movement of the lifting plate 113.

[0032] Furthermore, the dual-stage telescopic component includes a primary hydraulic cylinder 102 and a secondary hydraulic cylinder 103. The output end of the primary hydraulic cylinder 102 is connected to the top of the lower mounting plate 101, the other end of the primary hydraulic cylinder 102 is connected to the output end of the secondary hydraulic cylinder 103, and the other end of the secondary hydraulic cylinder 103 is connected to the lifting plate 113.

[0033] The primary hydraulic cylinder 102 actuates the lifting plate 113 to rise, causing the detection module 5 on the lifting plate 113 to press against the hydraulic valve plate 4, and the secondary hydraulic cylinder 103 finely adjusts the clamping force.

[0034] Furthermore, the lower limit assembly includes a support plate 108 symmetrically slidably connected to both sides of the lifting assembly. The top of the support plate 108 is connected to a plurality of limit rods 110. The limit rods 110 are in frictional contact with the bottom surface of the detection module 5. The support plate 108 is connected to the output end of a hydraulic cylinder 109, which is connected to the lower mounting plate 101.

[0035] After the clamping force of the hydraulic valve plate 4 is adjusted, the two hydraulic cylinders 109 operate simultaneously, causing the limit rod 110 to move directly below the detection module 5 and support the detection module 5, preventing the detection module 5 from being pushed open during the pressure test inside the hydraulic valve plate 4, which would cause oil leakage at the seal between the detection module 5 and the hydraulic valve plate 4.

[0036] Furthermore, two sets of slide rails 107 are provided on both sides of the lower mounting plate 101. Both sets of slide rails 107 are arranged along the transmission direction of the conveying platform 301, and the pallet 108 is slidably connected to the lower mounting plate 101 through the slide rails 107.

[0037] The smoothness of the movement of the pallet 108 is improved by setting the slide rail 107.

[0038] Furthermore, the pressing assembly includes a main hydraulic cylinder 208 mounted on the upper mounting plate 205. The output end of the main hydraulic cylinder 208 passes through the upper mounting plate 205 and is connected to a pressure plate 201. The top end of the pressure plate 201 is connected to one end of a plurality of sliding rods 207, and the other end of the sliding rods 207 is slidably connected to the upper mounting plate 205.

[0039] The main hydraulic cylinder 208 extends to drive the pressure plate 201 to press against the upper surface of the hydraulic valve plate 4. A linear bearing is installed on the upper mounting plate 205, and the slide rod 207 is slidably connected to the upper mounting plate 205 through the linear bearing, thereby improving the smoothness of the movement of the pressure plate 201. Furthermore, a hydraulic cavity is provided inside the pressure plate 201, and a piston plate is provided inside the hydraulic cavity. Multiple plunger rods 209 are connected to the bottom end of the piston plate. The bottom end of the plunger rods 209 penetrates the bottom wall of the pressure plate 201, forming a non-standard hydraulic cylinder. The clamping force of the plunger rods 209 is controlled by controlling the oil pressure of the hydraulic cavity, thereby replacing surface contact with point contact and improving the uniformity of the pressure applied to the hydraulic valve plate 4.

[0040] Furthermore, the upper limit assembly includes sliding plates 204 symmetrically slidably connected to both sides of the pressure plate 201. The bottom ends of both sliding plates 204 are connected to limit plates 202. The bottom ends of the limit plates 202 are in frictional contact with the top end of the pressure plate 201. The output end of a hydraulic cylinder 203 is connected to the sliding plate 204. The hydraulic cylinder 203 is connected to the bottom end of the upper mounting plate 205.

[0041] Two slide rails 206 are connected to the bottom of the upper mounting plate 205, and the slide plate 204 is slidably connected to the upper mounting plate 205 through the slide rails 206.

[0042] Furthermore, it also includes a PLC controller. Electromagnetic directional valves are installed on the oil pipes of the primary hydraulic cylinder 102, secondary hydraulic cylinder 103, hydraulic cylinder 109, hydraulic cylinder 214, main hydraulic cylinder 208, and hydraulic cylinder 203. The conveyor frame 301 and the electromagnetic directional valves are electrically connected to the PLC controller. Multiple photoelectric sensors and proximity switches are installed on the conveyor frame 301 and the lower mounting plate 101 to monitor the stroke of each actuator and transmit signals to the PLC controller. The PLC controller controls the sequence of actions of each actuator, achieving both precise positioning and automated control. Only the calibrated program needs to be input into the PLC controller. This part is existing technology and will not be elaborated upon here.

[0043] In this embodiment, the PLC controller is a Siemens PLC, model: 6ES7215-1AG40-0XB0; the photoelectric sensor is a Keyence PZ-G51P; and the proximity switch is a SICK IME12-04BPSZC0S.

[0044] The automatic clamping device provided by this utility model works as follows: During use, the tester places the hydraulic valve plate 4 on the tray 302, which is then conveyed to the lower clamping mechanism 1 and the upper clamping mechanism 2 via the conveyor frame 301. A photoelectric sensor monitors the position of the tray 302 and the hydraulic valve plate 4, transmitting the position signal to the PLC controller of the industrial control computer. The PLC controller controls the hydraulic cylinder 114 on the positioning assembly to drive the positioning rod 106, achieving precise positioning of the tray 302. Subsequently, the first-stage hydraulic cylinder 102 is activated, causing the lifting plate 113 to rise and lifting the detection module 5 on the lifting plate 113. This aligns the flow channel opening at the upper end of the detection module 5 with the flow channel opening of the hydraulic valve plate 4, pushing the hydraulic valve plate 4 upward and disengaging it from the tray 302. Thus, the hydraulic valve plate 4 is completely supported by the detection module 5. At this time, the lower limit assembly begins to operate. Hydraulic cylinder 109 extends, driving the limit rod 110 into the lower end of the detection module 5. The height position is finely adjusted by the secondary hydraulic cylinder 103. The secondary hydraulic cylinder 103 retracts, causing the detection module 5 to move slightly downward, and the lower surface of the detection module 5 contacts the upper surface of the limit rod 110. At this time, the pressure on the hydraulic valve plate 4 is transmitted to the lower mounting plate 101 through the detection module 5 and the limit rod 110. By controlling the extension of the main hydraulic cylinder 208, the pressure plate 201 is pressed against the upper surface of the hydraulic valve plate 4, and the upper limit assembly operates. Hydraulic cylinder 203 drives the limit plate 202 into the upper end of the pressure plate 201. Subsequently, the plunger rod 209 extends to press against the upper surface of the hydraulic valve plate 4. Since the limit plate 202 limits the pressure plate 201, the pressing reaction force of the upper plunger rod 209 is transmitted to the upper mounting plate 205 through the pressure plate 201 and the limit plate 202. Because the upper limit component and the lower limit component limit the pressure plate 201 and the detection module 5 respectively, the uniformity of the force on the hydraulic valve plate 4 is improved. At the same time, the constraint force between the detection module 5 and the hydraulic valve plate 4 is further improved, preventing oil leakage during the pressure test and improving the reliability of the test.

[0045] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. An automatic clamping device, characterized in that, The system includes, from top to bottom, an upper clamping mechanism (2), a conveying assembly (3), a detection module (5), and a lower clamping mechanism (1); the hydraulic valve plate (4) is sealed and fitted to the detection module (5) through the upper clamping mechanism (2) and the lower clamping mechanism (1); the conveying assembly (3) includes a conveying platform (301) and a tray (302); the conveying platform (301) is used to convey the tray (302); the tray (302) is used to load the hydraulic valve plate (4); the upper clamping mechanism (2) includes an upper mounting plate (205); the upper mounting plate (205)... A pressing component is provided in the middle of the 05), and an upper limit component is installed on the side of the upper mounting plate (205) near the tray (302). The upper limit component is used to limit the pressing end of the pressing component. The lower clamping mechanism (1) includes a lower mounting plate (101). A positioning component, a lifting component and a lower limit component are provided on the lower mounting plate (101). The positioning component is used to position the tray (302). The lifting component is used to push the detection module (5). The lower limit component is used to limit the lifting end of the lifting component.

2. The automatic clamping device according to claim 1, characterized in that, The positioning assembly includes a second hydraulic cylinder (114) fixedly connected to the middle of the lower mounting plate (101). The output end of the second hydraulic cylinder (114) is connected to a connecting plate (104). The top end of the connecting plate (104) is connected to a plurality of positioning rods (106). The tray (302) is provided with positioning holes (303), and the positioning holes (303) are correspondingly provided with the positioning rods (106).

3. The automatic clamping device according to claim 1, characterized in that, The lifting assembly includes vertical plates (105) vertically connected to both sides of the lower mounting plate (101), a lifting plate (113) slidably connected between the vertical plates (105), and a double-stage telescopic component installed on the lower mounting plate (101). One end of the double-stage telescopic component is connected to the lower mounting plate (101), and the other end of the double-stage telescopic component is connected to one end of the lifting plate (113).

4. The automatic clamping device according to claim 3, characterized in that, The dual-stage telescopic component includes a primary hydraulic cylinder (102) and a secondary hydraulic cylinder (103). The output end of the primary hydraulic cylinder (102) is connected to the top end of the lower mounting plate (101), the other end of the primary hydraulic cylinder (102) is connected to the output end of the secondary hydraulic cylinder (103), and the other end of the secondary hydraulic cylinder (103) is connected to the lifting plate (113).

5. The automatic clamping device according to claim 1, characterized in that, The lower limit assembly includes a support plate (108) symmetrically slidably connected to both sides of the lifting assembly. The top of the support plate (108) is connected to a plurality of limit rods (110). The limit rods (110) are in frictional contact with the bottom surface of the detection module (5). The support plate (108) is connected to the output end of a hydraulic cylinder (109). The hydraulic cylinder (109) is connected to the lower mounting plate (101).

6. The automatic clamping device according to claim 5, characterized in that, Two sets of slide rails (107) are provided on both sides of the lower mounting plate (101). Both sets of slide rails (107) are arranged along the transmission direction of the conveying platform (301). The pallet (108) is slidably connected to the lower mounting plate (101) through the slide rails (107).

7. The automatic clamping device according to claim 1, characterized in that, The pressing assembly includes a main hydraulic cylinder (208) mounted on the upper mounting plate (205). The output end of the main hydraulic cylinder (208) passes through the upper mounting plate (205) and is connected to a pressure plate (201). The top end of the pressure plate (201) is connected to one end of a plurality of slide rods (207), and the other end of the slide rods (207) is slidably connected to the upper mounting plate (205).

8. The automatic clamping device according to claim 7, characterized in that, The upper limit assembly includes sliding plates (204) symmetrically slidably connected to both sides of the pressure plate (201). The bottom ends of both sliding plates (204) are connected to limit plates (202). The bottom ends of the limit plates (202) are in frictional contact with the top end of the pressure plate (201). The output end of a hydraulic cylinder (203) is connected to the sliding plate (204). The hydraulic cylinder (203) is connected to the bottom end of the upper mounting plate (205).

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