Hydraulic cylinder with limiting function

Abstract

The hydraulic cylinder with the limiting function comprises a hydraulic cylinder body, two fixing seats which are symmetrically arranged relative to a cylinder body are fixed on the cylinder body of the hydraulic cylinder body, a first sleeve is installed on the fixing seats through a translation mechanism, and the translation mechanism is used for driving the first sleeve to translate. A travel switch is installed in the first sleeve, a first sliding block is slidably connected in the first sleeve in a sleeved mode, a spring is connected between the first sliding block and the inner wall of the first sleeve, a second shifting rod with a hemispherical head is fixed to the first sliding block, and a piston rod of the hydraulic cylinder body is fixedly connected with a fixing plate in a sleeved mode; a first guide rod is fixed on the fixed plate, the first guide rod is sleeved in the fixed seat in a sliding manner, and a first deflector rod with a hemispherical head is fixed on the first guide rod. According to the utility model, the piston rod can move within a specified range to achieve the purpose of limiting.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder with a limiter. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). For example, the Chinese patent with the authorization announcement number CN213270543 U has a simple structure and reliable operation, and is widely used in the hydraulic systems of various machines. The working principle of the hydraulic cylinder is based on the Pascal principle, that is, the principle that liquid transmits pressure in a closed container. In the pressure stage, the hydraulic oil is pumped into the inner cavity of the hydraulic cylinder, and the piston of the hydraulic cylinder moves outward under the action of the liquid pressure, thereby driving the mechanical device to work. In the oil return stage, the hydraulic oil in the hydraulic cylinder flows back to the oil tank through the valve, and the piston of the hydraulic cylinder moves inward under the action of the external load, completing a complete working cycle.

[0003] The movement position of the piston rod of our common hydraulic cylinder is often controlled by a mechanical position controller, which controls the movement position of the hydraulic cylinder through a manual device, knob, gear or spiral strip. This method requires experienced operators to correctly set and monitor the pressure and flow of the hydraulic system, and pay attention to the coordination between the various system components. Since this method relies heavily on experience and skills, it cannot guarantee that it can move accurately to the specified position every time. To solve this problem, we propose a hydraulic cylinder with limit. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a hydraulic cylinder with a limit.

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

[0006] A hydraulic cylinder with a limit position comprises a hydraulic cylinder body, wherein two fixed seats symmetrically arranged with respect to the cylinder body are fixed on the cylinder body of the hydraulic cylinder body, a first sleeve is installed on the fixed seat via a translation mechanism, the translation mechanism is used to drive the first sleeve to translate, a travel switch is installed in the first sleeve, a first slider is slidably sleeved in the first sleeve, a spring is connected between the first slider and the inner wall of the first sleeve, a second lever with a hemispherical head is fixed on the first slider, a fixed plate is fixedly sleeved on the piston rod of the hydraulic cylinder body, a first guide rod is fixed on the fixed plate, the first guide rod is slidably sleeved in the fixed seat, and a first lever with a hemispherical head is fixed on the first guide rod.

[0007] Preferably, the translation mechanism includes a motor, a second screw rod, a second guide rod, and a second slider. The motor is installed on a fixed seat. The output shaft of the motor is connected to the second screw rod. The second slider is threadedly sleeved on the second screw rod. The second slider is fixed on the first sleeve. The second slider is slidably sleeved on the second guide rod. The second guide rod is fixed on the fixed seat.

[0008] Preferably, a laser rangefinder for detecting the moving distance of the second lever is installed on the fixing seat.

[0009] Preferably, a first connecting seat is fixed on the cylinder body of the hydraulic cylinder body, a first screw rod is threadedly sleeved in the piston rod of the hydraulic cylinder body, a rotating column is fixed on the first screw rod, a second sleeve is rotatably sleeved on the rotating column, and a second connecting seat is fixed on the second sleeve.

[0010] Preferably, a rectangular block is fixedly sleeved on the first screw rod.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. In the utility model, the first sleeve is driven to translate by the translation mechanism, so that the position of the second lever can be moved synchronously. When the piston rod moves, the first lever is driven to move synchronously. Since the heads of the first lever and the second lever are both hemispherical, the first lever will squeeze the second lever when it contacts the second lever. At this time, the spring contracts. At this time, the first slider will squeeze the travel switch, thereby generating a signal. At this time, the piston rod can be controlled to stop moving and limit the position. By arranging two travel switches at symmetrical positions of the cylinder body, the piston rod can be moved within a specified range to achieve the purpose of limiting the position.

[0013] 2. In the utility model, the laser rangefinder is used to detect the moving distance of the second lever, so as to accurately control the limit range of the movement of the piston rod. The first screw rod can be driven to translate by rotating the first screw rod, so as to adjust the total length of the piston rod and the first screw rod, which is convenient for the installation of the hydraulic cylinder body on site. The rectangular block can be used to facilitate the rotation of the first screw rod by a wrench. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a hydraulic cylinder with a limiter proposed by the utility model;

[0015] Figure 2 A cross-sectional view of a first sleeve of a hydraulic cylinder with a limit provided by the utility model;

[0016] Figure 3 for Figure 1 Schematic diagram of the local structure.

[0017] In the figure: 1 cylinder body, 2 first connecting seat, 3 first sleeve, 4 first lever, 5 translation mechanism, 51 motor, 52 second screw rod, 53 second guide rod, 54 second slider, 6 fixed seat, 7 first guide rod, 8 fixed plate, 9 piston rod, 10 second connecting seat, 11 spring, 12 second lever, 13 first slider, 14 travel switch, 15 second sleeve, 16 rotating column, 17 rectangular block, 19 laser rangefinder, 20 first screw rod. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figure 1 , Figure 2 A hydraulic cylinder with a limit position comprises a hydraulic cylinder body, wherein two fixing seats 6 arranged symmetrically about the cylinder body 1 are fixed on the cylinder body 1 of the hydraulic cylinder body, a first sleeve 3 is installed on the fixing seat 6 through a translation mechanism 5, and the translation mechanism 5 is used to drive the first sleeve 3 to translate, and the first sleeve 3 is translated by the translation mechanism 5, so that the position of the second lever 12 can be moved synchronously, and when the piston rod 9 moves, the first lever 4 will be driven to move synchronously, because the heads of the first lever 4 and the second lever 12 are both hemispherical, when the first lever 4 contacts with the second lever 12, the second lever 12 will be squeezed, and at this time, the spring 11 will contract, and at this time, the first slider 13 will squeeze the travel switch 14, thereby generating a signal No., at this time, the piston rod 9 can be controlled to stop moving and achieve limiting. By arranging two travel switches 14 at symmetrical positions of the cylinder body 1, the piston rod 9 can be moved within the specified range to achieve the purpose of limiting. The travel switch 14 is installed in the first sleeve 3, and the first slider 13 is slidably sleeved in the first sleeve 3. A spring 11 is connected between the first slider 13 and the inner wall of the first sleeve 3. A second lever 12 with a hemispherical head is fixed on the first slider 13. A fixing plate 8 is fixedly sleeved on the piston rod 9 of the hydraulic cylinder body, and a first guide rod 7 is fixed on the fixing plate 8. The first guide rod 7 is slidably sleeved in the fixing seat 6, and a first lever 4 with a hemispherical head is fixed on the first guide rod 7.

[0020] Reference Figure 3 The translation mechanism 5 includes a motor 51, a second screw rod 52, a second guide rod 53, and a second slider 54. The motor 51 is installed on the fixed seat 6. The output shaft of the motor 51 is connected to the second screw rod 52. The second slider 54 is threadedly sleeved on the second screw rod 52. The second slider 54 is fixed on the first sleeve 3. The second guide rod 53 is slidably sleeved on the second slider 54. The second guide rod 53 is fixed on the fixed seat 6.

[0021] The motor 51 drives the second screw rod 52 to rotate. The second screw rod 52 can drive the second slider 54 to translate on the second guide rod 53 through threaded transmission between the second screw rod 52 and the second slider 54, thereby synchronously driving the first sleeve 3 to translate.

[0022] A laser rangefinder 19 for detecting the moving distance of the second lever 12 is mounted on the fixing seat 6. The laser rangefinder 19 is used to detect the moving distance of the second lever 12, so that the limiting range of the movement of the piston rod 9 can be accurately controlled.

[0023] A first connecting seat 2 is fixed on the cylinder body 1 of the hydraulic cylinder body, a first screw rod 20 is threadedly sleeved in the piston rod 9 of the hydraulic cylinder body, a rotating column 16 is fixed on the first screw rod 20, a second sleeve 15 is rotatably sleeved on the rotating column 16, and a second connecting seat 10 is fixed on the second sleeve 15. The first screw rod 20 can be driven to translate by rotating the first screw rod 20, so that the total length of the piston rod 9 and the first screw rod 20 can be adjusted, which is convenient for the installation of the hydraulic cylinder body on site. A rectangular block 17 is fixedly sleeved on the first screw rod 20, and the rectangular block 17 is convenient for driving the first screw rod 20 to rotate by a wrench.

[0024] Working principle: When in use, the first sleeve 3 is driven to translate through the translation mechanism 5, so that the position of the second lever 12 can be moved synchronously. When the piston rod 9 moves, the first lever 4 will be driven to move synchronously. Since the heads of the first lever 4 and the second lever 12 are both hemispherical, the first lever 4 will squeeze the second lever 12 when it contacts the second lever 12. At this time, the spring 11 contracts. At this time, the first slider 13 will squeeze the travel switch 14, thereby generating a signal. At this time, the piston rod 9 can be controlled to stop moving and limit the position. By arranging two travel switches 14 at symmetrical positions of the cylinder body 1, the piston rod 9 can be moved within a specified range to achieve the purpose of limiting the position. The laser rangefinder 19 is used to detect the moving distance of the second lever 12, so as to accurately control the limit range of the movement of the piston rod 9. By rotating the first screw rod 20, the first screw rod 20 can be driven to translate, so that the total length of the piston rod 9 and the first screw rod 20 can be adjusted, which is convenient for the installation of the hydraulic cylinder body on site. The rectangular block 17 is convenient for driving the first screw rod 20 to rotate through a wrench.

[0025] The operating principle of the translation mechanism 5 is: the motor 51 drives the second screw rod 52 to rotate, and the second screw rod 52 can drive the second slider 54 to translate on the second guide rod 53 through the threaded transmission between the second screw rod 52 and the second slider 54, thereby synchronously driving the first sleeve 3 to translate.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydraulic cylinder with a limit position, comprising a hydraulic cylinder body, characterized in that: Two fixed seats (6) symmetrically arranged with respect to the cylinder body (1) are fixed on the cylinder body (1) of the hydraulic cylinder body; a first sleeve (3) is mounted on the fixed seat (6) via a translation mechanism (5); the translation mechanism (5) is used to drive the first sleeve (3) to translate; a travel switch (14) is mounted in the first sleeve (3); a first slider (13) is slidably sleeved in the first sleeve (3); a spring (11) is connected between the first slider (13) and the inner wall of the first sleeve (3); a second lever (12) with a hemispherical head is fixed on the first slider (13); a fixed plate (8) is fixedly sleeved on the piston rod (9) of the hydraulic cylinder body; a first guide rod (7) is fixed on the fixed plate (8); the first guide rod (7) is slidably sleeved in the fixed seat (6); and a first lever (4) with a hemispherical head is fixed on the first guide rod (7).

2. A hydraulic cylinder with a limit according to claim 1, characterized in that: The translation mechanism (5) comprises a motor (51), a second screw rod (52), a second guide rod (53), and a second slider (54); the motor (51) is mounted on a fixed seat (6); the output shaft of the motor (51) is connected to the second screw rod (52); the second slider (54) is threadedly sleeved on the second screw rod (52); the second slider (54) is fixed on the first sleeve (3); the second guide rod (53) is slidably sleeved on the second slider (54); and the second guide rod (53) is fixed on the fixed seat (6).

3. A hydraulic cylinder with a limit according to claim 1, characterized in that: A laser rangefinder (19) for detecting the moving distance of the second shifting rod (12) is installed on the fixing seat (6).

4. A hydraulic cylinder with a limit according to claim 1, characterized in that: A first connecting seat (2) is fixed on the cylinder body (1) of the hydraulic cylinder body, a first screw rod (20) is threadedly sleeved in the piston rod (9) of the hydraulic cylinder body, a rotating column (16) is fixed on the first screw rod (20), a second sleeve (15) is rotatably sleeved on the rotating column (16), and a second connecting seat (10) is fixed on the second sleeve (15).

5. A hydraulic cylinder with a limit according to claim 4, characterized in that: A rectangular block (17) is fixedly sleeved on the first screw rod (20).

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