Test platform based on hydraulic power rapid distribution

Abstract

The utility model relates to the technical field of test platforms, in particular to a test platform based on hydraulic power rapid distribution, which further comprises a hydraulic power rapid distribution mechanism arranged on a base, the hydraulic power rapid distribution mechanism comprises a motor, a delivery pump, a three-position four-way reversing valve and an oil cylinder, the oil cylinder comprises a cylinder body, and the cylinder body is arranged on the base. The three-position four-way reversing valve is arranged in the cylinder body, a piston is arranged in the cylinder body and divides the interior of the cylinder body into a first cavity and a second cavity, piston rods are arranged at the two ends of the piston and protrude out of the cylinder body, and the movable clamp set is fixedly connected to the cylinder body. Oil can be fed into the first cavity and / or pressure control can be carried out, the speed of the movable clamping plier set close to or away from the fixed clamping plier set is accurately controlled, the acting force of the movable clamping plier set and the fine clamping plier set on a product is accurately controlled, the product testing precision and controllability are improved, and the applicability of the testing platform is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to test platform technical field especially based on hydraulic power quick distribution's test platform. BACKGROUND

[0002] In the mine car steering system test process, the influence of steering force to steering mechanism needs to be completed through special power test mechanism, how to analyze the dynamic characteristic analysis of hydraulic power in the case of external force participation system inside, thus needs a special hydraulic power quick distribution test platform, to determine the specific influence of steering and regenerative power to the system, to determine and optimize the specific design parameters of relevant oil cylinder. The traditional test equipment mainly includes fixed holding clamp group and movable holding clamp group, and the fixed holding clamp group and movable holding clamp group are used for clamping the test product respectively, and the fixed holding clamp group and movable holding clamp group are provided with unequal volume hydraulic cylinders, the movable holding clamp group is driven by the hydraulic cylinder to approach or away from the fixed holding clamp group, realizes the stretching of the product, and the left and right stretching forces are inconsistent, the system pressure is changed constantly, to meet the test requirements. The system pressure is changed constantly to realize the pressurization of the measured oil cylinder, and the precise tension test requirement cannot be achieved, the remote control reduces the test precision of the test platform, and the use range of the test platform is also reduced. CONTENT OF THE UTILITY MODEL

[0003] The utility model solves the technical problems that: in order to solve the problem that the movable holding clamp group is directly driven by the hydraulic cylinder, the tension is not good to control, the precise tension test requirement cannot be achieved, the test precision of the test platform is reduced, and the use range of the test platform is also reduced, and the utility model provides a test platform based on hydraulic power quick distribution.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a test platform based on rapid hydraulic power distribution, including a base, on which a fixed clamp assembly and a moving clamp assembly are arranged, and a rapid hydraulic power distribution mechanism is also arranged on the base. The rapid hydraulic power distribution mechanism includes a motor, a delivery pump, a three-position four-way reversing valve, and a hydraulic cylinder. The hydraulic cylinder includes a cylinder body, in which a piston is arranged, dividing the cylinder body into a first chamber and a second chamber. Both ends of the piston are provided with piston rods that protrude from the cylinder body. The volumes of the first chamber and the second chamber are approximately equal. The movable clamp assembly is fixedly connected to the cylinder body, and the piston rods at both ends of the piston are fixedly connected to the base. The output end of the motor is connected to the power input end of the delivery pump, the input end of the delivery pump is connected to the oil tank, the output end of the delivery pump is connected to the P port of the three-position four-way directional valve, the T port of the three-position four-way directional valve is connected to the oil tank, the A port of the three-position four-way directional valve is connected to the second chamber, the B port of the three-position four-way directional valve is connected to the first chamber, and a pressure reducing valve is connected in parallel between the B port of the three-position four-way directional valve and the first chamber. Compared with the prior art, this solution, through the pressure reducing valve connected in parallel between the B port of the three-position four-way directional valve and the first chamber, can control the pressure of oil entering the first chamber and / or sometimes control it, precisely controlling the speed of the movable clamp assembly as it approaches or moves away from the fixed clamp assembly. This achieves precise control of the force exerted on the product by the movable clamp assembly and the precision clamp assembly, improving the accuracy of product testing and enhancing the applicability of the testing platform.

[0005] To better control the pressure reduction of the pressure-reducing valve, in some preferred embodiments, a pressure switch is connected between the B port of the three-position four-way directional valve and the first chamber. This pressure control switch monitors the operation of the pressure-reducing valve. By comparing the system pressure with the pressure-reducing valve's control pressure, the system can be promptly shut off when the system pressure is greater than or less than the pressure-reducing valve's control pressure, thereby protecting the system. Through the pressure switch, the system's set pressure is monitored in real time, and the system pressure is compared with the pressure after passing through the pressure-reducing valve to determine if the test requirements have been met. If not, the system operation is stopped.

[0006] To prevent impact issues caused by collisions between the piston and cylinder during testing, in some preferred embodiments, a spring for controlling the displacement speed of the hydraulic cylinder is installed in the first cavity of the cylinder. The spring in the first cavity maintains pressure on the hydraulic cylinder when the product is stretched, increases the retraction speed of the hydraulic cylinder when it returns to its original position, improves testing efficiency, further simulates extreme steering and steering characteristic requirements, and simulates applied force input.

[0007] In some preferred embodiments, one end of the spring is fixed to the piston, and the other end of the spring is fixed to the hydraulic cylinder.

[0008] To increase the testing pressure of the testing platform, in some preferred embodiments, an overflow valve is provided between the other end of the delivery pump and the P port of the three-position four-way directional valve. By providing an overflow valve between the other end of the delivery pump and the P port of the three-position four-way directional valve, the overflow valve ensures the pressure stability of the entire testing system and the maximum working pressure of the system. This prevents problems such as insufficient pressure during testing that prevents the cylinder from moving, and excessive system pressure that damages the product. The pressure can be increased or decreased in real time according to testing requirements.

[0009] In some preferred embodiments, a slide block is further included, which is fixedly mounted on the hydraulic cylinder, and the movable clamp assembly is fixedly mounted on the slide block.

[0010] In some preferred embodiments, a fixing sleeve is fixedly connected to the slide plate. One side of the fixing sleeve is provided with a groove that matches the cylinder body. There are two fixing sleeves arranged opposite each other. The two ends of the oil cylinder are respectively arranged in the grooves of the two fixing sleeves. The fixing sleeve is provided with a through hole that matches the piston rod. The piston rod is arranged in the through hole to prevent the axial and radial movement of the oil cylinder.

[0011] In some preferred embodiments, the fixing sleeve is a half structure.

[0012] In some preferred embodiments, the retaining sleeve is fixed to the slide plate by screws.

[0013] The beneficial effects of this utility model are as follows: When using a test platform based on rapid hydraulic power distribution, this utility model utilizes a pressure reducing valve connected in parallel between the B port of a three-position four-way directional valve and the first chamber. This valve allows for oil inlet into the first chamber and / or pressure control, precisely controlling the speed at which the moving clamping jaws approach or move away from the fixed clamping jaws. This achieves precise control of the force exerted on the product by the moving and fixed clamping jaws, improving the accuracy of product testing and enhancing the applicability of the test platform. It avoids the problems of existing methods that directly drive the moving clamping jaws with hydraulic cylinders, resulting in poor force control, inability to meet precise force testing requirements, reduced testing accuracy, and a narrower range of applications. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0016] Fig. 2 This is a hydraulic system diagram of the hydraulic power rapid distribution mechanism of this utility model;

[0017] Fig. 3 This is a schematic diagram of the structure between the slide and the hydraulic cylinder in this utility model.

[0018] In the diagram: 1. Base, 2. Fixed clamp assembly, 3. Moving clamp assembly, 4. Motor, 5. Delivery pump, 6. Three-position four-way directional valve, 8. Cylinder body, 9. Piston rod, 10. First chamber, 11. Second chamber, 12. Pressure reducing valve, 13. Pressure switch, 14. Spring, 15. Overflow valve, 16. Slide, 17. Fixing sleeve. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the embodiments:

[0020] This utility model is not limited to the following specific embodiments. Those skilled in the art can implement this utility model using various other specific embodiments based on the disclosed content. Any modifications or alterations to the design structure and concept of this utility model also fall within the protection scope of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this utility model can be combined with each other.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figs. 1-3As shown, a test platform based on rapid hydraulic power distribution includes a base 1 and a rapid hydraulic power distribution mechanism disposed on the base 1. A fixed clamp group 2 and a movable clamp group 3 are disposed on the upper surface of the base 1. In this embodiment, the fixed clamp group 2 and the movable clamp group 3 can be bench vises to clamp the product. The fixed clamp group 2 is fixed on the left side of the base 1, and the movable clamp group 3 is located on the right side of the base 1.

[0024] The hydraulic power rapid distribution mechanism includes a motor 4, a delivery pump 5, a three-position four-way directional valve 6, and a hydraulic cylinder. The hydraulic cylinder includes a cylinder body 8, which houses a piston and divides the cylinder body 8 into a first chamber 10 and a second chamber 11. The first chamber 10 and the second chamber 11 have equal volumes. Piston rods 9 are provided at both ends of the piston and protrude from the cylinder body 8. A moving clamp assembly 3 is fixedly connected to the cylinder body 8. The piston rods 9 at both ends of the piston are fixedly connected to a base 1. A spring 14 is installed in the first chamber 10 of the cylinder body 8. One end of the spring 14 is fixed to the piston, and the other end is fixed to the hydraulic cylinder. The spring 14 is used to control the displacement speed of the hydraulic cylinder. The output end of the motor 4 is connected to the power input end of the delivery pump 5. The input end of pump 5 is connected to the oil tank. The output end of pump 5 is connected to the P port of the three-position four-way directional valve 6. The T port of the three-position four-way directional valve 6 is connected to the oil tank. The A port of the three-position four-way directional valve 6 is connected to the second chamber 11. The B port of the three-position four-way directional valve 6 is connected to the first chamber 10. A pressure reducing valve 12 is connected in parallel between the B port of the three-position four-way directional valve 6 and the first chamber 10. A pressure switch 13 is connected between the B port of the three-position four-way directional valve 6 and the first chamber 10. The pressure control switch is used to control the operation of the pressure reducing valve 12. An overflow valve 15 is provided between the other end of pump 5 and the P port of the three-position four-way directional valve 6. The pressure setting of the overflow valve 15 is always greater than the maximum pressure of the pressure reducing valve 12.

[0025] The test platform also includes a slide 16, which is fixedly mounted on the cylinder. The movable clamp assembly 3 is fixedly mounted on the slide 16. A fixing sleeve 17 is fixedly connected to the slide plate. One side of the fixing sleeve 17 is provided with a groove that matches the cylinder body 8. There are two fixing sleeves 17, which are arranged opposite each other. The two ends of the cylinder are respectively located in the grooves of the two fixing sleeves 17. The fixing sleeve 17 is provided with a through hole that matches the piston rod 9. The piston rod 9 is located in the through hole. The fixing sleeve 17 has a split structure and is fixed to the slide plate with screws.

[0026] When the aforementioned test platform based on rapid hydraulic power distribution is in use, it is mainly used for applications requiring rapid cylinder return, pressure holding, and pressure adjustment. It can provide different tensile forces according to different product testing requirements and meet the tensile force requirements. During testing, the rapid left and right movement of the cylinder body 8 in the cylinder reduces system impact. At the same time, the pressure reducing valve 12 can meet the testing time required by the test platform and also unload the hydraulic system, protecting the hydraulic system while meeting testing requirements.

[0027] During testing, the product is first clamped on the fixed clamp group 2 and the moving clamp group 3. When the product needs to be stretched, the motor 4 is started and the delivery pump 5 is driven to work. The three-position four-way reversing valve 6 is in the right position. The delivery pump 5 delivers the oil in the tank to the P port of the three-position four-way valve and enters the second chamber 11 of the oil cylinder through the A port. The cylinder body 8 moves to the right, and the moving clamp group 3 gradually moves away from the fixed clamp group 2. At the same time, the oil in the first chamber 10 returns to the oil cylinder through the B and T ports of the three-position four-way valve. The spring 14 in the first chamber 10 is stretched. The cylinder body 8 drives the slide 16 to move to the right. The oil in the first chamber 10 returns to the oil cylinder through the B and T ports of the three-position four-way valve.

[0028] During the testing process on the testing platform, when pressure holding is required, that is, when the test pressure needs to be maintained for a period of time, the three-position four-way directional valve 6 is placed in the neutral position, and the motor 4 stops to save energy. If the motor 4 does not stop, the pressure setting value of the relief valve 15 can be reduced. In this embodiment, the pressure setting value of the relief valve 15 is 0.2 Bar, and then the oil returns to the oil tank. The pressure values ​​of the A port and B port of the three-position four-way directional valve 6 are equal. However, because the oil cylinder has a spring 14 in the first chamber 10 at the right end, the spring 14 provides a certain force to the cylinder body 8 and can hold the pressure. When it is necessary to reduce the holding pressure, the pressure switch 13 is opened, and part of the oil returns directly to the oil tank through the pressure reducing valve 12, and the holding pressure is reduced. At this time, if the pressure of the oil cylinder needs to be increased, the three-position four-way directional valve 6 needs to be switched to the left position, and the motor 4 starts according to the demand signal of the pressure switch 13, and the system enters the pressurization state.

[0029] After the test is completed, the three-position four-way directional valve 6 switches to the left position. During the movement to the left, the pressure control system composed of pressure reducing valve 12 and pressure switch 13 increases or decreases the pressure to adjust according to the detection force required by the platform. Pressure switch 13 detects its value and finds that the pressure drop does not meet the detection requirements. At this time, the relief valve 15 is adjusted to increase the system pressure output. The pressure adjustment of the main system is formed by the relief valve 15 together with the relief valve 15.

[0030] The above description, based on the preferred embodiments of this utility model, provides inspiration. Those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification but must be determined according to the claims.

Claims

1. A test platform based on rapid hydraulic power distribution, comprising a base, wherein a fixed clamp assembly and a movable clamp assembly are disposed on the base, characterized in that: It also includes a hydraulic power rapid distribution mechanism mounted on the base. The hydraulic power rapid distribution mechanism includes a motor, a delivery pump, a three-position four-way directional valve, and a hydraulic cylinder. The hydraulic cylinder includes a cylinder body, in which a piston is disposed, dividing the cylinder body into a first chamber and a second chamber. Both ends of the piston are provided with piston rods that protrude from the cylinder body. The first chamber and the second chamber have equal volumes. The moving clamp assembly is fixedly connected to the cylinder body. The piston rods at both ends of the piston are fixedly connected to the base. The output end of the motor is drivenly connected to the power input end of the delivery pump. The input end of the delivery pump is connected to the oil tank. The output end of the delivery pump is connected to the P port of the three-position four-way directional valve. The T port of the three-position four-way directional valve is connected to the oil tank. The A port of the three-position four-way directional valve is connected to the second chamber. The B port of the three-position four-way directional valve is connected to the first chamber. A pressure reducing valve is connected in parallel between the B port of the three-position four-way directional valve and the first chamber.

2. The test platform based on rapid hydraulic power distribution according to claim 1, characterized in that: A pressure switch is connected between port B of the three-position four-way directional valve and the first chamber. The pressure switch is used to monitor the operation of the pressure reducing valve. By comparing the system pressure with the control pressure of the pressure reducing valve, the system can be shut off in time when the system pressure is greater than or less than the control pressure of the pressure reducing valve, thereby protecting the system.

3. The test platform based on rapid hydraulic power distribution according to claim 1, characterized in that: A spring for controlling the displacement speed of the hydraulic cylinder is installed in the first cavity of the cylinder body.

4. The test platform based on rapid hydraulic power distribution according to claim 3, characterized in that: One end of the spring is fixed to the piston, and the other end of the spring is fixed to the oil cylinder.

5. The test platform based on rapid hydraulic power distribution according to claim 1, characterized in that: An overflow valve is installed between the other end of the delivery pump and the P port of the three-position four-way reversing valve.

6. The test platform based on rapid hydraulic power distribution according to claim 1, characterized in that: It also includes a slide block, which is fixedly mounted on the hydraulic cylinder, and the movable clamp assembly is fixedly mounted on the slide block.

7. The test platform based on rapid hydraulic power distribution according to claim 6, characterized in that: A fixed sleeve is fixedly connected to the slide block. One side of the fixed sleeve is provided with a groove that matches the cylinder body. There are two fixed sleeves arranged opposite each other. The two ends of the oil cylinder are respectively set in the grooves of the two fixed sleeves. The grooves are movable to control the axial movement of the oil cylinder. The oil cylinder is fixed to the moving clamp with the radial flange. The fixed sleeve is provided with a through hole that matches the piston rod. The piston rod is set in the through hole.

8. The test platform based on rapid hydraulic power distribution according to claim 7, characterized in that: The fixing sleeve is a half structure.

9. The test platform based on rapid hydraulic power distribution according to claim 8, characterized in that: The retaining sleeve is fixed to the slide by screws.

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