Detection device for hydraulic damper

Abstract

The utility model relates to the technical field of damper detection, in particular to a detection device for a hydraulic damper, which aims to solve the technical problems of high cost and inconvenience in installation of a damper detection device in the prior art, and specifically comprises a bottom plate and a top plate which are horizontally arranged, and a partition plate is arranged between the bottom plate and the top plate in parallel. The bottom plate, the top plate and the partition plate are fixedly connected through vertically-arranged connecting columns to form an overall frame structure, the area between the top plate and the partition plate is arranged as a detection area of the hydraulic damper, and the upper portion of the detection area is provided with an upper balance weight mechanism used for applying constant pressure to the hydraulic damper. A lower counterweight mechanism for applying constant tension to the hydraulic damper is arranged at the lower part of the detection area; by arranging the upper balance weight mechanism and the lower balance weight mechanism, the constant force is adjusted by increasing or decreasing the number of the balance weight blocks, complex algorithms and control programs are not needed, the structure is small and exquisite, installation is convenient, and good use prospects are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of damper detection, in particular to a detection device for a hydraulic damper. Background Art

[0002] In the past decade or so, due to the country's high attention to medical devices and people's urgent need for rehabilitation medical services, rehabilitation medical equipment has developed rapidly. Against this background, the hydraulic damper has stood out in the counterweight system of rehabilitation medical equipment by virtue of its unique performance advantages, that is, providing a more stable and finely adjustable resistance output than traditional counterweight blocks, and has become an indispensable key component.

[0003] However, the wide application of hydraulic dampers has also put forward higher requirements for their performance detection. In order to ensure that the products meet the design standards and clinical application requirements, strict performance verification must be carried out. At present, large test benches are used for testing hydraulic dampers, that is, test benches driven by accumulator groups and oil cylinders. These devices not only require complex algorithms and control logics to accurately control the force or speed output, resulting in high design complexity and expensive use costs, but also are often bulky, heavy, and difficult to install. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a detection device for a hydraulic damper with a simple structure, convenient installation, and without complex algorithms and control logics in view of the deficiencies of the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A detection device for a hydraulic damper includes a horizontally arranged bottom plate and a top plate. A partition is arranged in parallel between the bottom plate and the top plate. The bottom plate, the top plate and the partition are fixedly connected by vertically arranged connecting columns to form an overall frame structure. The area between the top plate and the partition is set as the detection area of the hydraulic damper. Its characteristics are:

[0007] An upper counterweight mechanism for applying a constant pressure to the hydraulic damper is arranged in the upper part of the detection area, and a lower counterweight mechanism for applying a constant tension to the hydraulic damper is arranged in the lower part of the detection area;

[0008] The upper counterweight mechanism includes a variable load pressing block. The variable load pressing block is provided with an upper ear seat downward that is matched with the fixed end of the hydraulic damper. The variable load pressing block is provided with a vertical guide rod upward. A through hole for the guide rod to penetrate is correspondingly arranged on the top plate. A horizontal upper locking hole is arranged on the lower section of the guide rod. An upper positioning mechanism for locking the variable load pressing block is arranged on the top plate and is matched with the upper locking hole;

[0009] The lower counterweight mechanism includes a variable-load pulling block. An upper ear seat that cooperates with the floating end of the hydraulic damper is provided upward on the variable-load pulling block. A horizontal lower locking hole is provided on the side of the variable-load pulling block. A lower positioning mechanism that cooperates with the lower locking hole and is used to lock the variable-load pulling block is provided on the partition board.

[0010] When both the variable-load pressing block and the variable-load pulling block are locked, a collision prevention space not less than the maximum stroke of the hydraulic damper is provided between the variable-load pulling block and the partition board.

[0011] The technical problem to be solved by the present utility model can also be further achieved through the following steps. The upper positioning mechanism includes an upper pin seat provided on the top plate on one side of the through hole. An upper pin that cooperates with the upper locking hole is slidably installed in the upper pin seat.

[0012] The technical problem to be solved by the present utility model can also be further achieved through the following steps. The lower positioning mechanism includes a lower pin seat provided above the partition board. The lower pin seat is fixed to the partition board through a vertically arranged support rod. A lower pin that cooperates with the lower locking hole is slidably installed in the lower pin seat.

[0013] The technical problem to be solved by the present utility model can also be further achieved through the following steps. An opening is provided in the middle of the partition board. A reset ejector rod that cooperates with the variable-load pulling block is vertically provided in the opening. A driving mechanism is provided between the partition board and the bottom plate. The driving mechanism is used to drive the reset ejector rod to move upward and jack the variable-load pulling block to the locking height that cooperates with the lower positioning mechanism.

[0014] The technical problem to be solved by the present utility model can also be further achieved through the following steps. The driving mechanism is a vertically arranged electric push rod. The output end of the electric push rod is fixedly connected to the reset ejector rod as a whole.

[0015] The technical problem to be solved by the present utility model can also be further achieved through the following steps. An upper counterweight piece with adjustable weight is provided on the variable-load pressing block. A lower counterweight piece with adjustable weight is provided on the variable-load pulling block.

[0016] The technical problem to be solved by the present utility model can also be further achieved through the following steps. Both the upper counterweight piece and the lower counterweight piece are a number of stacked counterweight blocks.

[0017] The technical problem to be solved by the present utility model can also be further achieved through the following steps. The top plate extends downward to form a cylindrical positioning portion. A guiding channel that cooperates with the guiding rod is provided in the positioning portion.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: By setting the upper counterweight mechanism and the lower counterweight mechanism, the gravity of the upper counterweight is used as the constant pressure for driving the compression of the hydraulic damper, and the gravity of the lower counterweight is used as the constant tension for driving the stretching of the hydraulic damper. The magnitude of the constant force is adjusted by increasing or decreasing the number of counterweight blocks. Without complex algorithms and control programs, the structure is small and convenient to install, and it has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the utility model;

[0020] Figure 2 is a front schematic diagram of the utility model;

[0021] Figure 3 is a schematic diagram of the working state a of the utility model;

[0022] Figure 4 is a schematic diagram of the working state b of the utility model;

[0023] Figure 5 is a schematic diagram of the working state c of the utility model;

[0024] Figure 6 is a schematic diagram of the working state d of the utility model;

[0025] Figure 7 is a schematic diagram of the working state e of the utility model;

[0026] In the figure: 1 - bottom plate; 2 - top plate; 3 - partition plate; 4 - hydraulic damper; 5 - variable load pressing block; 6 - upper ear seat; 7 - guide rod; 8 - upper locking hole; 9 - variable load pulling block; 10 - lower ear seat; 11 - lower locking hole; 12 - upper pin seat; 13 - lower pin seat; 14 - support rod; 15 - reset push rod; 16 - electric push rod; 17 - upper counterweight; 18 - lower counterweight; 19 - positioning part. DETAILED DESCRIPTION OF THE INVENTION

[0027] The following further describes the specific technical solutions of the present utility model so that those skilled in the art can further understand the present utility model without restricting its rights.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the utility model.

[0029] Please refer to Figures 1-7 , a detection device for a hydraulic damper, comprising a horizontally arranged bottom plate 1 and a top plate 2. A partition plate 3 is arranged in parallel between the bottom plate 1 and the top plate 2. The bottom plate 1, the top plate 2 and the partition plate 3 are fixedly connected by vertically arranged connecting columns to form an integral frame structure. The area between the top plate 2 and the partition plate 3 is set as the detection area of the hydraulic damper 4.

[0030] An upper counterweight mechanism for applying a constant pressure to the hydraulic damper is arranged at the upper part of the detection area, and a lower counterweight mechanism for applying a constant tension to the hydraulic damper is arranged at the lower part of the detection area. The hydraulic damper 4 to be measured needs to be vertically arranged between the upper counterweight mechanism and the lower counterweight mechanism.

[0031] The upper counterweight mechanism includes a horizontal variable load pressing block 5. An upper counterweight 17 with adjustable weight is arranged on the variable load pressing block 5. The upper counterweight 17 is a number of stacked counterweight blocks, and the pressure variable load can be realized by adjusting the number and specifications of the counterweight blocks.

[0032] The variable load pressing block 5 is fixedly provided with a upper ear seat 6 at the lower part, which is matched with the fixed end (i.e., the cylinder end) of the hydraulic damper. The variable load pressing block 5 is fixedly provided with a vertical guide rod 7 at the upper part. A through hole for the guide rod 7 to penetrate is correspondingly arranged on the top plate 2. The top plate 2 extends downward to form a cylindrical positioning part 19. A guide channel matched with the guide rod 7 is arranged in the positioning part 19. The function of the guide rod 7 is to cooperate with the guide channel to limit the movement direction of the variable load pressing block 5, so that it keeps vertical lifting without deflection.

[0033] A horizontal upper locking hole 8 is arranged at the lower section of the guide rod 7. An upper positioning mechanism for locking the variable load pressing block 5 is arranged on the top plate 2 and is matched with the upper locking hole 8. As Figure 3 shown, when the variable load pressing block 5 is locked, the cylinder of the hydraulic damper 4 is fixed at the upper part of the detection area. The upper positioning mechanism includes an upper pin seat 12 arranged on the top plate 2 on one side of the through hole. An upper pin matched with the upper locking hole 8 is slidably installed in the upper pin seat 12.

[0034] The lower counterweight mechanism includes a horizontal variable load pulling block 9. A lower counterweight 18 with adjustable weight is arranged on the variable load pulling block 9. The lower counterweight 18 is also a number of stacked counterweight blocks, and the tension variable load can be realized by adjusting the number and specifications of the counterweight blocks.

[0035] The variable-load pulling block 9 is fixedly provided with an upper lower ear seat 10 that cooperates with the floating end (i.e., the piston rod end) of the hydraulic damper. A horizontal lower locking hole 11 is provided on the side of the variable-load pulling block 9. On the partition plate 3, there is a lower positioning mechanism that cooperates with the lower locking hole 11 to lock the lower part of the variable-load pulling block 9. The lower positioning mechanism includes a lower pin seat 13 arranged above the partition plate 3. The lower pin seat 13 is fixed to the partition plate 3 through a vertically arranged support rod 14. A lower pin that cooperates with the lower locking hole 11 is slidably installed in the lower pin seat 13. On the partition plate 3, there are multiple mounting holes that cooperate with the support rod, and the mounting position of the lower pin seat 13 can be adjusted according to actual needs. One or more lower locking holes 11 can be provided to adapt to the lower pin seats 13 at different positions.

[0036] As Figures 6-7 shown, when both the variable-load pressing block 5 and the variable-load pulling block 9 are locked, the hydraulic damper to be tested is compressed to the minimum stroke. There is a collision-proof space not less than the maximum stroke of the hydraulic damper between the variable-load pulling block 9 and the partition plate 3 to allow its piston rod to fully extend.

[0037] As Figure 1 shown, an opening is provided in the middle of the partition plate 3. A reset ejector rod 15 that cooperates with the variable-load pulling block 9 is vertically arranged in the opening. A driving mechanism is provided between the partition plate 3 and the bottom plate 1. The driving mechanism is used to drive the reset ejector rod 15 to move upward to lift the variable-load pulling block 9 to the locking height that cooperates with the lower positioning mechanism.

[0038] The driving mechanism is a vertically arranged electric push rod 16. The output end of the electric push rod 16 is fixedly connected to the reset ejector rod 15 as a whole. The thrust of the electric push rod 16 is sufficient to push the maximum weight of the hydraulic damper and the counterweight. In addition, the driving mechanism can also be an electric cylinder, a lead screw mechanism driven by a motor, etc., as long as it can achieve the above functions.

[0039] Working principle: For a detection device for a hydraulic damper of the present utility model, referring to Figures 3-7 , the usage steps of this detection device are as follows:

[0040] 1) Installation: As Figure 3 shown, insert the guide rod 7 connecting the variable-load pressing block 5 into the through hole of the top plate 2 and fix it with an upper pin; place the variable-load pressing block 5 at the center of the partition plate 3 (i.e., directly opposite the variable-load pulling block 9), install the cylinder end of the hydraulically extended damper to the upper ear seat 6, and install the piston rod end to the lower ear seat 10.

[0041] 2) Compression: As Figure 4As shown, the upper counterweight 17 is installed on the variable load pressing block 5, and its weight is adjusted according to requirements; the upper pin is opened, and under the action of the variable load pulling block 9 and the gravity of the cylinder block, the hydraulic damper begins to be compressed, and the timing starts at this time; when it is compressed to the bottom, the timing is immediately stopped. This time is the compression time of this counterweight at this gear position.

[0042] 3) Reset: As Figures 5-6 shown, start the electric push rod 16, push the counterweight and the damper as a whole back upwards, insert the upper pin and the lower pin, and retract the electric push rod 16.

[0043] 4) Tension: As Figure 7 shown, the lower counterweight 18 is installed on the variable load pressing block 5, and its weight is adjusted according to requirements; the lower pin is opened, and under the gravity of the variable load pulling block 9, the hydraulic damper begins to be stretched, and the timing starts at this time; when it is stretched to the bottom, the timing is immediately stopped. This time is the stretching time of this counterweight at this gear position. At this time, the compression and stretching tests are completed, and the hydraulic damper can be replaced according to needs or the next set of tests can be directly carried out.

[0044] Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. A detection device for a hydraulic damper, comprising a bottom plate and a top plate arranged horizontally, a partition plate arranged parallel to the bottom plate and the top plate, the bottom plate, the top plate and the partition plate are fixedly connected by vertically arranged connecting columns to form an integral frame structure, the area between the top plate and the partition plate is set as a detection area of ​​the hydraulic damper, characterized in that: An upper counterweight mechanism for applying a constant pressure to the hydraulic damper is provided at the upper part of the detection area, and a lower counterweight mechanism for applying a constant pulling force to the hydraulic damper is provided at the lower part of the detection area; The upper counterweight mechanism includes a variable load pressure block, the variable load pressure block is provided with an upper ear seat matching with the fixed end of the hydraulic damper downwardly, the variable load pressure block is provided with a vertical guide rod upwardly, a through hole for the guide rod to pass through is correspondingly provided on the top plate, a horizontal upper locking hole is provided on the lower section of the guide rod, and an upper positioning mechanism matching with the upper locking hole for locking the variable load pressure block is provided on the top plate; The lower counterweight mechanism comprises a variable load pull block, the variable load pull block is provided with a lower ear seat upwardly matched with the floating end of the hydraulic damper, a horizontal lower locking hole is provided on the side of the variable load pull block, and a lower positioning mechanism matched with the lower locking hole and used to lock the variable load pull block is provided on the partition plate; When the variable load pressure block and the variable load pull block are both locked, an anti-collision space not less than the maximum stroke of the hydraulic damper is provided between the variable load pull block and the partition plate.

2. The detection device for a hydraulic damper according to claim 1, characterized in that: The upper positioning mechanism comprises an upper latch seat arranged on a top plate at one side of the through hole, and an upper latch pin matched with the upper locking hole is slidably installed in the upper latch seat.

3. The detection device for a hydraulic damper according to claim 1, characterized in that: The lower positioning mechanism comprises a lower latch seat arranged above the partition, the lower latch seat and the partition are fixed via a vertically arranged supporting rod, and a lower latch matched with a lower lock hole is slidably installed in the lower latch seat.

4. The detection device for a hydraulic damper according to claim 1, characterized in that: An opening is provided in the middle of the partition, and a reset push rod cooperating with the variable load pull block is vertically provided in the opening. A driving mechanism is provided between the partition and the bottom plate, and the driving mechanism is used to drive the reset push rod to move upward to lift the variable load pull block to a locking height cooperating with the lower positioning mechanism.

5. The detection device for a hydraulic damper according to claim 4, characterized in that: The driving mechanism is a vertically arranged electric push rod, and the output end of the electric push rod is fixedly connected to the reset push rod as a whole.

6. The detection device for a hydraulic damper according to claim 1, characterized in that: An upper counterweight with adjustable weight is arranged on the variable load pressure block, and a lower counterweight with adjustable weight is arranged on the variable load pulling block.

7. The detection device for a hydraulic damper according to claim 6, characterized in that: The upper counterweight and the lower counterweight are both counterweight blocks that are stacked.

8. The detection device for a hydraulic damper according to claim 1, characterized in that: The top plate is extended downward to be provided with a cylindrical positioning portion, and a guide channel matched with the guide rod is arranged in the positioning portion.

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