CN209416735U - A jack hydraulic testing device - Google Patents

Abstract

A jack hydraulic testing device includes a fixed frame, a movable frame, a hydraulic cylinder, a jack, a guide rail and a load cell; the jack is mounted on the movable frame through a top body; The piston rod is universally connected with the movable frame; the force sensor is set correspondingly to the jack rod for pressing the jack rod, and the jack and the hydraulic cylinder form a top-to-top state when the force sensor is pressed; the guide rail is installed on the On the fixed frame, a guide groove is provided, and the guide groove is provided with an arc-shaped guide wall; the guide body located in the guide groove is installed on the movable frame, so that the guide body can be guided along the arc during the topping process. Lead wall operation. The jack hydraulic test device has a relatively simple structure, light weight, small floor space, convenient testing, and at the same time, it can simulate the running track of the car jack.

Description

A jack hydraulic testing device

technical field

The utility model relates to the technical field of jack testing, in particular to a jack hydraulic testing device.

Background technique

At present, a kind of jack that lifts heavy objects in a small stroke through the top is widely used in the market, especially a scissor jack that is used in car lifting. After the jack is manufactured, the jack needs to be inspected, such as load capacity inspection, destructive inspection, lowest point height (position) inspection, lifting to the highest point height (position) inspection, and simulated lifting of heavy objects. Pressure and deformation detection, etc.

For this reason, those skilled in the art have developed a kind of detection device specially used for detecting the jack, and the device is provided with a profiling vehicle frame fixed on the ground. The length, supporting position and height of the profiling vehicle frame are basically the same as those of the existing automobile compartment. In order to simulate various heavy objects loaded in the compartment and test various jacks, a fixed heavy object and a movable jack are arranged on the device. Type heavy objects to imitate the load capacity of the carriage to detect the load capacity of various jacks.

During the test, the jack is placed on the fixed frame at the front end of the profiling frame, and the jack drives the weight up and down to simulate the running track of the car jack. A circular arc trajectory with a radius of 4 meters.

When the device tests jacks of different specifications, it is necessary to adjust the movable weight on the device. The load test adjustment is relatively complicated, and the test range suitable for the jack is relatively narrow. In addition, the device is provided with a profiling vehicle frame, and various heavy objects need to be loaded on the vehicle frame. The whole device is relatively heavy, occupies a large area, and is not simple and light enough.

For this reason, how to design a test device with a relatively simple structure, light weight, small footprint, and convenient testing, while simultaneously simulating the use and running track of the car jack, is a technical problem that technicians in the industry need to solve urgently.

Utility model content

The technical problem to be solved by the utility model is to provide a jack hydraulic detection device which can at least partly solve the above technical problems.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: a jack hydraulic testing device, including a fixed frame, a movable frame, a hydraulic cylinder, a jack, a guide rail and a load cell;

The jack is installed on the movable frame through the top body;

The hydraulic cylinder is installed on the fixed frame through the cylinder body, and the piston rod of the hydraulic cylinder is universally connected with the movable frame;

The load cell is arranged correspondingly to the jack rod so as to be pressed by the jack rod, and when the load cell is pressed against, the jack and the hydraulic cylinder form a top-to-top state;

The guide rail is installed on the fixed frame, and a guide groove is provided, and the guide groove is provided with an arc-shaped guide wall;

A guide body is installed on the movable frame, so that the guide body runs along the arc guide wall during the top alignment process.

In some embodiments, the arc-shaped guide wall is an outwardly convex arc-shaped surface arranged on both inner sidewalls at the opening of the guide groove, and the simulated car jack is realized by the guide body running along the outwardly-convex arc-shaped surface. The trajectory used.

In some embodiments, the guide body includes a movable body running along the arc-shaped guide wall and a connecting body installed on the movable frame, which runs through the moving body and connects through the connecting body, so that the whole operation can be actually realized.

In some embodiments, the moving body is preferably a ball bearing, and one end of the connecting body is preferably installed on the inner ring of the ball bearing and the other end is installed on the connecting shaft on the movable frame. The ball bearing rotates flexibly and cooperates with the connecting shaft Finally, the outer ring of the ball bearing can run smoothly along the arc-shaped guide wall driven by the connecting shaft.

In some embodiments, the movable frame and the fixed frame are long rectangular frame structures, and the movable frame is located in the fixed frame, which realizes the layout of the inside and outside, so that the entire test device occupies less space, and the overall structure Compact and well laid out.

In some embodiments, the piston rod of the hydraulic cylinder is universally connected to the movable frame through joint bearings.

In some embodiments, the movable frame is provided with an upper mounting plate, and the upper mounting plate is provided with a hole with a bottom bracket for installing the joint bearing, so that the joint bearing can be reliably fitted.

In some embodiments, the movable frame is provided with a lower mounting plate, and the lower mounting plate is provided with a hole with a side opening for the top body of the jack to be inserted into, and the flange plate of the jack is used to realize fastening and matching with the lower mounting plate. The assembly structure can realize reliable assembly of jacks with different outer diameters of the top body.

In some embodiments, the guide rail is installed in an installation box with one side open, and a bar-shaped groove is provided on the back of the installation box to implement height-adjustable installation of the guide rail through fasteners.

In some embodiments, the hydraulic cylinder is installed upside down on the top of the fixed frame, and the piston rod extends into the fixed frame, and the jack is installed on the movable frame in an inverted state with the top body on the top and the ejector rod on the bottom. The main body of the rear jack body is located in the movable frame, and the ejector rod protrudes downward from the movable frame. In the natural state, the hydraulic cylinder piston rod, the joint bearing, and the jack ejector rod are coaxial from top to bottom. The structure is vertically arranged on the coaxial line, which ensures that the hydraulic cylinder and the jack can form a top-to-top state during the test, and also ensures the running track of the jack.

Compared with the prior art, the jack hydraulic detection device of the utility model has the following beneficial effects:

1. By using the settings of the hydraulic cylinder and the force sensor, by adjusting the working pressure of the hydraulic cylinder, it is convenient to detect the parameters of the load capacity of various specifications of the jack during the process of jacking the rod against the force sensor, and it can be in the running state Make quick adjustments.

2. Through the setting of the guide groove, and setting the arc-shaped guide wall on the guide groove, the arc-shaped guide wall is set to imitate the running track of the jack during actual operation, which can conveniently simulate the running track of the jack, and has The characteristics of small footprint. At the same time, different profiling structures can be made to simulate the running trajectories of various jacks to meet various testing requirements.

3. The piston rod of the hydraulic cylinder and the movable frame are connected by joint bearings, which effectively eliminates the disadvantage that the centerline of the piston rod is not aligned with the centerline of the movable frame when the guide body runs along the guide groove during the operation of the jack.

4. Compared with the prior art, the shape and size of the components required by the hydraulic detection device for the jack of the utility model are much smaller, and the overall structure is relatively simple and light.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model. For those of ordinary skill in the art, they can also

The other figures are derived from the structures shown in these figures.

Fig. 1 is a structural schematic diagram of a jack hydraulic detection device of the present invention.

Fig. 2 is a schematic diagram of a partial exploded structure of the assembly between the movable frame, the jack and the joint bearing of the jack hydraulic detection device of the present invention.

Fig. 3 is a partial cross-sectional structural schematic diagram of the assembly of the guide rail and the guide body of the jack hydraulic detection device of the present invention.

Fig. 4 is a partial structural diagram of fitting between the guide rail and the fixed frame of the hydraulic jack testing device of the present invention.

1 fixed frame, 2 movable frame, 3 hydraulic cylinder, 31 cylinder block, 32 piston rod, 4 jack, 41 top body, 42 ejector rod, 43 flange plate, 5 guide rail, 6 load cell, 7 guide groove, 8 curved guide walls, 9 guide bodies, 10 moving bodies, 11 connecting bodies, 13 joint bearings, 14 upper mounting plates, 141 bottom brackets, 15 lower mounting plates, 16 mounting boxes, 161 bar grooves.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present utility model, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the relative positional relationship, movement conditions, etc. between the components shown in the figure below are changed, if the specific posture changes, the directional indication will also change accordingly.

In the accompanying drawings of the embodiments shown in the utility model, Fig. 1 is a structural schematic diagram of the jack hydraulic detection device of the utility model. Fig. 2 is a schematic diagram of a partial exploded structure of the assembly between the movable frame, the jack and the joint bearing of the jack hydraulic detection device of the present invention. Fig. 3 is a partial structural schematic diagram of fitting between the movable frame and the guide body of the jack hydraulic detection device of the present invention. Fig. 4 is a partial structural schematic diagram of fitting between the fixed frame and the guide rail of the jack hydraulic detection device of the present invention.

The utility model provides a jack hydraulic testing device, which comprises a fixed frame 1, a movable frame 2, a hydraulic cylinder 3, a jack 4, a guide rail 5 and a force sensor 6.

The jack 4 is mounted on the movable frame 2 through the top body 41 .

The hydraulic cylinder 3 is installed on the fixed frame 1 through the cylinder body 31 , and the piston rod 32 of the hydraulic cylinder 3 is universally connected with the movable frame 2 .

The load cell 6 is arranged correspondingly to the jack 4 jack 42 for the jack 4 to press down, and the jack 4 and the hydraulic cylinder 3 form a top-to-top state when the load sensor 6 is pressed.

The guide rail 5 is installed on the fixed frame 1 , and a guide groove 7 is provided, and the guide groove 7 is provided with an arc-shaped guide wall 8 .

The guide body 9 located in the guide groove 7 is installed on the movable frame 2, so that the guide body 9 runs along the arc-shaped guide wall 8 during the top alignment process.

The utility model adopts the above-mentioned technical scheme, utilizes the principle of hydraulic pressure, and can conveniently detect the load capacity of the jack through the cooperative arrangement of the above-mentioned components such as the hydraulic cylinder and the load cell.

The jack hydraulic testing device of the present invention will be described in detail below with the embodiments shown in accompanying drawings 1 to 4 .

In this embodiment, the jack hydraulic testing device includes a fixed frame 1 , a movable frame 2 , a hydraulic cylinder 3 , a jack 4 , a guide rail 5 and a load cell 6 . Wherein the fixed frame 1 and the movable frame 2 are long rectangular frame structures, and the movable frame 2 is generally centered in the fixed frame 1 . The fixed frame 1 is immovable relative to the movable frame 2. The fixed frame 1 is provided with supporting feet to be firmly placed on the ground. The fixed frame 1 is used to carry various components of the test device, that is to say, it is used as a fixed carrier for each component. The hydraulic cylinder 3 is installed upside down on the mounting plate (not marked) on the top of the fixed frame 1 , and the piston rod 32 of the hydraulic cylinder 3 extends downward into the fixed frame 1 and is located on the movable frame 2 . The jack 4 is installed on the movable frame 2 with the top body 41 on the top and the push rod 42 on the bottom. Out of the movable frame 2. The load cell 6 is located directly below the push rod 42 and is placed on a pad (not marked), which is used to be placed on the ground. The load cell 6 is used to accept the pressing effect of the ejector rod 42 when the ejector rod 42 moves downward, wherein the ejector pressure is defined relative to the name of the ejector rod, and it is not necessarily called the ejector only when it is pointed upward. pressure. The measurement range of the load cell 6 is higher than the force range of the jack 4, and the load detection of various jacks can be realized by adjusting the working pressure of the hydraulic cylinder, and the adjustment during operation can be realized. The pads used to support the load cell 6 can be selected at an appropriate height according to the difference in the stroke of the jack, so as to calibrate the extension length of the piston rod 32 of the hydraulic cylinder 3 .

In this embodiment, the piston rod 32 of the hydraulic cylinder 3 is universally connected to the movable frame 2 through the joint bearing 13 . In order to realize universal connection and installation, the movable frame 2 is provided with an upper installation plate 14 , and the upper installation plate 14 is provided with a hole body with a bottom support 141 to install the joint bearing 13 .

In order to realize the assembly of the jack, in the present embodiment, the movable frame 2 is provided with a lower mounting plate 15, and the lower mounting plate 15 is provided with a hole body with a side opening for the top body 41 of the jack 4 to be inserted into and utilize the jack 4 The flange plate 43 realizes the fast fitting with the lower mounting plate 15 . The hole body is preferably opened in a U-shaped hole body. After opening, when assembling, the side wall of the jack body is close to the innermost end of the U-shaped hole body, and then the flange 43 and the lower mounting plate 15 are connected by fasteners. Fasten the connection. Because the innermost end of the U-shaped hole is in the shape of an arc, the top body whose outer diameter is smaller than the opening width of the U-shaped hole can be fitted on the movable frame in a close-fitting manner, so as to realize the jacking of various types and specifications. equipped. When assembled, the flange 43 is located below the lower mounting plate 15 .

In this embodiment, the guide rail 5 is made of a long rectangular structure, the guide rail is vertically mounted on the fixed frame, and the guide rail is provided with a guide groove 7 extending along its height direction and having a T-shaped cross section. The arc-shaped guide wall 8 is an outwardly convex arc-shaped surface arranged on the two inner side walls at the opening of the guide groove 7, and the walls at the upper and lower ends of the outwardly-convex arc-shaped surface are straight walls. In order to make the guide body 9 run more smoothly and reliably, the inner bottom wall of the guide groove 7 opposite to the opening is provided with an inner concave arc surface to match the outer convex arc surface, so that the guide body 9 is concave Runs between arcuate and convex arcuate surfaces.

The utility model adopts the above joint bearing to ensure that when the movable frame runs along the arc-shaped guide wall of the guide groove, the vertical center line of the jack is offset from the center line of the piston rod of the hydraulic cylinder during operation.

In this embodiment, the guide rail 5 is installed in an installation box 16 with one side open, and a bar-shaped groove 161 is provided on the back of the installation box 16 to implement height-adjustable installation of the guide rail 5 through fasteners. The height of the guide rail 5 is adjustable to meet different testing requirements. When replacing the guide rail, after the original guide rail is removed from the installation box, the new guide rail can be assembled, and the operation is convenient.

In this embodiment, the guide body 9 includes a movable body 10 running along the arc-shaped guide wall 8 and a connecting body 11 installed on the movable frame 2 . The moving body 10 is preferably a ball bearing, and the connecting body 11 is preferably a connecting shaft with one end mounted on the inner ring of the ball bearing and the other end mounted on the movable frame 2 . The connecting shaft rod and the ball bearing can run together with the movable frame along the arc-shaped guide wall in the guide groove.

After each component is assembled, in the natural state, the piston rod 32 of the hydraulic cylinder 3, the joint bearing 13, and the jack 42 of the jack are arranged coaxially from top to bottom.

When the jack is running, there is a period of idle travel without force until the jack rod contacts the load cell below. parameters have been adjusted in advance). After being stressed, the piston rod, joint bearing, movable frame and connecting shaft of the hydraulic cylinder move along the arc-shaped guide wall of the guide groove following the ball bearing. The ball bearing runs along this arc-shaped guide wall to realize the track that the jack is installed on the carriage body.

The guide groove is used for simulating the motion track and has an arc-shaped guide wall. Therefore, during the movement of the hydraulic cylinder and the movable frame, they operate according to the guide groove to realize the running track when the jack is installed on the actual carriage. The simulated motion trajectory in the guide groove can also be adjusted with different arc surfaces and different stroke lengths according to requirements.

Claims (10)

1. a kind of jack hydraulic test device, it is characterised in that: including fixed frame (1), movable frame (2), hydraulic cylinder (3), jack (4), guide rail (5) and load cell (6)；

The jack (4) is by top body (41) on movable frame (2)；

The hydraulic cylinder (3) by cylinder body (31) loaded on fixed frame (1), the piston rod (32) of the hydraulic cylinder (3) and movable Frame (2) universal connection；

The load cell (6) is correspondingly arranged with jack (4) mandril (42), for jack (4) mandril (42) press, and It is formed in press load cell (6) Shi Suoshu jack (4) and hydraulic cylinder (3) to dome-shaped state；

Guide channel (7) are arranged on fixed frame (1) in the guide rail (5), and the guide channel (7) is provided with arc guiding Wall (8)；

The guide body (9) being positioned on the movable frame (2) in guide channel (7), to make guide body during to top (9) arcuately guiding walls (8) are run.

2. a kind of jack hydraulic test device according to claim 1, it is characterised in that: the arc guiding walls (8) For the evagination arcwall face being arranged on two inner sidewalls of guide channel (7) opening.

3. a kind of jack hydraulic test device according to claim 1 or 2, it is characterised in that: guide body (9) packet Include the arcuately kinetoplast (10) of guiding walls (8) operation and the connector (11) being mounted on movable frame (2).

4. a kind of jack hydraulic test device according to claim 3, it is characterised in that: the kinetoplast (10) is ball Bearing, the connector (11) be one end loaded on ball bearing inner ring and the other end loaded on the connection shaft on movable frame (2).

5. a kind of jack hydraulic test device according to claim 1, it is characterised in that: the movable frame (2) and Fixed frame (1) is long cuboid frame structure, and movable frame (2) is located among fixed frame (1).

6. a kind of jack hydraulic test device according to claim 1, it is characterised in that: the work of the hydraulic cylinder (3) Stopper rod (32) and movable frame (2) pass through the universal connection of oscillating bearing (13) realization.

7. a kind of jack hydraulic test device according to claim 6, it is characterised in that: the movable frame (2) sets Upper mounting plate (14) are set, which opens up the hole body with collet (141) to install oscillating bearing (13).

8. a kind of jack hydraulic test device according to claim 1 or claim 7, it is characterised in that: the movable frame (2) It is arranged lower installation board (15), which opens up the hole body of side mouth so that jack (4) top body (41) is inserted in simultaneously Realize that the fastening with lower installation board (15) is equipped using jack (4) ring flange (43).

9. a kind of jack hydraulic test device according to claim 1, it is characterised in that: be loaded in the guide rail (5) In the open mounting box in one side (16), back setting strip groove (161) of the mounting box (16) is to pass through fastener to guide rail (5) height-adjustable installation is carried out.

10. a kind of jack hydraulic test device according to claim 6, it is characterised in that: hydraulic cylinder (3) upside-down mounting At the top of fixed frame (1) and piston rod (32) stretches in fixed frame (1), and the jack (4) is to push up body (41) upper And inversion state of the mandril (42) under is loaded on movable frame (2), jack (4) top body (41) main body after being equipped with is located at can In dynamic frame (2), and mandril (42) extends downwardly movable frame (2), and in its natural state, hydraulic cylinder (3) piston rod (32) closes Bearings (13), jack (4) mandril (42) from top to bottom coaxial line.