Supporting leg oil cylinder structure

Abstract

The utility model relates to a supporting leg oil cylinder structure, and belongs to the field of vehicle accessories. According to the technical scheme, the supporting leg oil cylinder structure comprises a cylinder body and a cylinder rod, a position sensor and a pressing assembly are installed on the outer wall of the cylinder body, an induction rod is installed on the cylinder rod, the induction rod is arranged in the axial direction of the cylinder body, the induction rod is located on the outer side of the cylinder body in the circumferential direction, and the pressing assembly is installed on the cylinder rod. The pressing assembly makes contact with the side face of the induction rod and presses the induction rod on the outer wall of the cylinder body, and the induction rod is located in the detection direction of the position sensor. The utility model has the beneficial effects that the position sensor detects the position of the induction rod stretching along with the cylinder rod to realize the detection of the stretching position, and meanwhile, the pressing assembly is arranged to press the induction rod on the outer surface of the cylinder body to inhibit the jumping of the induction rod and avoid the collision between the induction rod and the position sensor, thereby improving the stability and service life of the equipment; and the detection of the position sensor is more accurate.

Description

Technical Field

[0001] The utility model relates to the field of vehicle accessories, in particular to an outrigger oil cylinder structure. Background Art

[0002] Wheeled crane is a special crane equipment, its main feature is to install the crane on the chassis of a truck. Wheeled crane has the advantages of wide wheelbase, good stability, short body, small turning radius, etc. It can work within 360° and is widely used in construction, freight and other fields.

[0003] Wheeled cranes are usually equipped with hydraulic outriggers. When performing lifting operations, the hydraulic outriggers are unfolded, and the lifting hydraulic cylinders are extended and supported on the ground. On the one hand, this expands the chassis support area of ​​the vehicle, making the lifting operation safer and more stable; on the other hand, it can effectively reduce the pressure on the tires, reduce the wear caused by the friction between the tires of the truck and the ground, extend the service life of the tires, and reduce the torsional stress damage to the steel structure of the truck trolley.

[0004] Hydraulic outriggers are usually arranged in pairs on both sides of the vehicle body. Due to the unstable factors of the hydraulic system, such as the difference in the distribution of hydraulic oil in the branches of each hydraulic outrigger, the elongation of each hydraulic outrigger may be different, resulting in reduced stability of the vehicle body. To this end, a solution is to set a detection mechanism on the hydraulic outrigger to detect the elongation and limit it to form a closed-loop control of the hydraulic system. However, in the detection mechanism, the detection proton and the sensor are respectively installed on the hydraulic cylinder body and the cylinder rod. In the actual working process, factors such as vehicle driving, hydraulic system operation, and outrigger load changes will cause the vehicle and the hydraulic outrigger to vibrate, resulting in collision between the detection proton and the sensor, causing the detection mechanism to fail frequently, and the actual use effect is not good. Summary of the invention

[0005] Aiming at the problem that the current position detection structure of hydraulic outriggers is easily damaged by collision, the utility model provides an outrigger oil cylinder structure which is not easily damaged.

[0006] In order to solve the above problems, the technical solution adopted by the utility model is a support leg cylinder structure, including a cylinder body and a cylinder rod, a position sensor and a clamping assembly are installed on the outer wall of the cylinder body, a sensing rod is installed on the cylinder rod, the sensing rod is arranged along the axial direction of the cylinder body, the sensing rod is located on the circumferential outside of the cylinder body, the clamping assembly contacts the side of the sensing rod and presses the sensing rod against the outer wall of the cylinder body, and the sensing rod is located in the detection direction of the position sensor. In this solution, the position sensor detects the position of the sensing rod as the cylinder rod is extended and retracted to realize the detection of the telescopic position. At the same time, a clamping assembly is provided to press the sensing rod against the outer surface of the cylinder body to suppress its jumping and avoid its collision with the position sensor, thereby improving the stability and service life of the equipment and making the position sensor detection more accurate.

[0007] Preferably, two position sensors are arranged along the axial direction of the cylinder body, a sensing protrusion is arranged on the side of the sensing rod, and the position sensor detects the position of the sensing protrusion. The upper and lower limit positions of the sensing protrusion are detected, and the detection control is more accurate.

[0008] Preferably, a sensor mounting seat is fixedly mounted on the outer wall of the cylinder body, the sensor mounting seat is U-shaped, the two ends of the U-shape of the sensor mounting seat are connected to the outer wall of the cylinder body, the sensing rod passes through the cavity surrounded by the sensor mounting seat and the outer wall of the cylinder body, the position sensor is mounted in the middle section of the sensor mounting seat, and the detection direction of the position sensor is toward the outer wall of the cylinder body. The sensor mounting seat with a U-shaped structure can limit the sensing rod laterally on both sides to prevent it from swinging left and right, and limit the sensing rod in the detection direction of the position sensor. Cooperating with the clamping mechanism, the limiting effect of the sensing rod can be better achieved.

[0009] Preferably, the clamping assembly includes a movable rod, which is hingedly mounted on the cylinder body, and a pressure wheel and a spring are mounted on the movable rod, and the two ends of the spring are respectively connected to the movable rod and the cylinder body, and the pressure wheel rolls with the side of the sensing rod facing away from the cylinder body, and presses the sensing rod against the outer side of the cylinder body. The clamping mechanism uses a spring to achieve floating clamping, and can retreat a certain distance during vibration to avoid structural damage.

[0010] Preferably, the spring and the pressure wheel are respectively located at two ends of the movable rod, and the middle portion of the movable rod is hinged to the cylinder body.

[0011] Preferably, a plurality of the clamping assemblies are arranged along the axial direction of the cylinder body.

[0012] Preferably, a cross bar is provided at the lower end of the sensing rod, the cross bar is perpendicular to the sensing rod, and a clamp is provided at one end of the cross bar away from the sensing rod, the clamp is fixedly mounted on the lower part of the cylinder rod to compensate for the radius difference between the cylinder rod and the cylinder body, so that the sensing rod reaches the outer surface position of the cylinder body.

[0013] It can be seen from the above technical scheme that the advantages of the utility model are that the scheme leads out and installs a sensing rod on the cylinder rod of the outrigger oil cylinder, and arranges a position sensor on the cylinder body, and limits the sensing rod to a specific position close to the outer wall of the cylinder body through the sensor mounting seat and the clamping assembly, thereby avoiding collision between the sensing rod and the position sensor due to vibration, avoiding damage to structures such as the sensor and the sensing rod, and improving the stability and service life of the equipment; the clamping assembly adopts a spring to form an elastic floating structure, which can allow the sensing rod to jump when the vibration is large, thereby reducing the risk of damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.

[0016] Description of main reference numerals

[0017] 1. Cylinder body, 2. Cylinder rod, 3. Position sensor, 4. Sensor mounting base, 5. Sensing rod, 6. Movable rod, 7. Pressure wheel, 8. Spring, 9. Cross bar, 10. Hoop. DETAILED DESCRIPTION

[0018] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0019] like Figure 1 As shown, a leg cylinder structure is shown. The main body of the leg cylinder can adopt the model of a commonly used hydraulic leg. The leg cylinder main body is arranged in the vertical direction after being loaded on a vehicle. It includes a cylinder body 1 and a cylinder rod 2. The cylinder rod 2 extends downward from the cylinder body 1 and can be telescopic. A support foot is installed at the lower end of the cylinder rod 2. This is the conventional structure of an existing hydraulic cylinder leg.

[0020] On this basis, a position sensor 3 is installed on the outer wall of the cylinder body 1, and a sensing rod 5 is installed on the cylinder rod. Specifically:

[0021] The outer surface of the cylinder body 1 is axially provided with two upper and lower sensor mounting seats 4, and the two sensor mounting seats 4 are located on the same element line of the cylinder body 1. The sensor mounting seat is a U-shaped structure, and the two ends of the U-shape (i.e., the two straight rod ends parallel to each other) are fixedly connected to the outer surface of the cylinder body 1, and the plane where the U-shape is located is perpendicular to the axis of the cylinder body. Furthermore, the sensor mounting seat 4 and the outer wall of the cylinder body 1 form a closed area, and the position sensor 3 is installed in the middle part of the U-shape (i.e., the connecting rod between the two straight rods), and the detection direction of the position sensor 3 is radially toward the outer wall of the cylinder body.

[0022] The sensing rod 5 is a long straight rod parallel to the axial direction of the oil cylinder. A cross bar 9 is provided at the lower end of the cylinder rod. The cross bar 9 is perpendicular to the sensing rod 5. The two are connected in an L shape. A clamp 10 is provided at the end of the cross bar 9 away from the sensing rod 5. The clamp 10 is fixedly installed at the lower part of the cylinder rod 2. The length of the cross bar is adapted to the radius difference between the cylinder body 1 and the cylinder rod 2, so that the sensing rod 5 is located at the outer surface of the cylinder body. At the same time, the sensing rod 5 passes through the area surrounded by the sensor mounting seat and the outer wall of the cylinder body 1. A sensing protrusion is provided on the upper part of the sensing rod 5, and the position sensor detects the position of the sensing protrusion.

[0023] The cylinder body 1 is also provided with a clamping assembly, which can be directly installed or indirectly installed, such as Figure 1 In the embodiment shown, the clamping assembly includes a movable rod 6, which is hingedly mounted on the sensor mounting seat (that is, indirectly mounted on the cylinder body through the sensor mounting seat), and a pressure wheel 7 and a spring 8 are installed on the movable rod 6. The two ends of the spring 8 are respectively connected to the movable rod 6 and the cylinder body 1. The pressure wheel 7 is in rolling contact with the side of the sensing rod 5 facing away from the cylinder body, and presses the sensing rod 5 against the outer side of the cylinder body 1. The spring 8 and the pressure wheel 7 are respectively located at the two ends of the movable rod 6. The spring is a compression spring with a tendency to elongate. The middle part of the movable rod 6 is hinged to the cylinder body 1. In the embodiment, two clamping assemblies are provided corresponding to two sensor mounting seats, and other numbers may be used in other embodiments.

[0024] When the outrigger oil cylinder is in operation, the spring 8 drives the movable rod, thereby pressing the pressure wheel 7 against the side of the sensing rod, pressing the sensing rod against the outer wall of the cylinder body 1 to prevent it from jumping up due to equipment vibration and colliding with the position sensor. The distance between the two position sensors and the sensing protrusions corresponds to the telescopic setting position of the outrigger oil cylinder. When the sensing protrusion reaches the lower position sensor, the cylinder extends to its full length. When the sensing protrusion reaches the upper position sensor, the cylinder retracts to its full length. The two position sensors are connected to the valve signals on the hydraulic branch corresponding to the outrigger oil cylinder to control the outrigger oil cylinder to maintain it in the corresponding telescopic state. The specific hydraulic system is the prior art of wheeled cranes and will not be described in detail here.

[0025] It can be seen from the above embodiments that the beneficial effect of the utility model lies in that the scheme installs a sensing rod on the cylinder rod of the outrigger oil cylinder, and arranges a position sensor on the cylinder body, and limits the sensing rod to a specific position close to the outer wall of the cylinder body through the sensor mounting seat and the clamping assembly, thereby avoiding collision between the sensing rod and the position sensor due to vibration, avoiding damage to structures such as the sensor and the sensing rod, and improving the stability and service life of the equipment; the clamping assembly adopts a spring to form an elastic floating structure, which can allow the sensing rod to jump when the vibration is large, thereby reducing the risk of damage.

[0026] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A leg oil cylinder structure, comprising a cylinder body (1) and a cylinder rod (2), characterized in that: A position sensor (3) and a clamping assembly are mounted on the outer wall of the cylinder body (1); a sensing rod (5) is mounted on the cylinder rod (2); the sensing rod (5) is arranged along the axial direction of the cylinder body (1); the sensing rod (5) is located on the circumferential outer side of the cylinder body (1); the clamping assembly contacts the side surface of the sensing rod and presses the sensing rod against the outer wall of the cylinder body (1); the sensing rod (5) is located in the detection direction of the position sensor (3).

2. The outrigger oil cylinder structure according to claim 1, characterized in that: Two position sensors (3) are arranged along the axial direction of the cylinder body (1), a sensing protrusion is arranged on the side surface of the sensing rod (5), and the position sensor (3) detects the position of the sensing protrusion.

3. The outrigger oil cylinder structure according to claim 1, characterized in that: A sensor mounting seat (4) is fixedly mounted on the outer wall of the cylinder body (1); the sensor mounting seat (4) is U-shaped, and both ends of the U-shape of the sensor mounting seat (4) are connected to the outer wall of the cylinder body; the sensing rod (5) passes through a cavity enclosed by the sensor mounting seat (4) and the outer wall of the cylinder body; the position sensor (3) is mounted in the middle section of the sensor mounting seat (4); and the detection direction of the position sensor (3) faces the outer wall of the cylinder body (1).

4. The outrigger oil cylinder structure according to any one of claims 1 to 3, characterized in that: The pressing assembly comprises a movable rod (6), the movable rod (6) being hingedly mounted on the cylinder body (1), a pressing wheel (7) and a spring (8) being mounted on the movable rod (6), the two ends of the spring (8) being respectively connected to the movable rod (6) and the cylinder body (1), the pressing wheel (7) being in rolling contact with the side of the sensing rod (5) facing away from the cylinder body, and pressing the sensing rod (5) against the outer side of the cylinder body (1).

5. The outrigger oil cylinder structure according to claim 4, characterized in that: The spring (8) and the pressure wheel (7) are respectively located at two ends of the movable rod (6), and the middle part of the movable rod (6) is hinged to the cylinder body (1).

6. The outrigger oil cylinder structure according to any one of claims 1 to 3, characterized in that: A plurality of the clamping assemblies are arranged along the axial direction of the cylinder body (1).

7. The outrigger oil cylinder structure according to any one of claims 1 to 3, characterized in that: A cross bar (9) is provided at the lower end of the sensing rod (5), the cross bar (9) being perpendicular to the sensing rod (5), and a clamp (10) is provided at one end of the cross bar (9) away from the sensing rod (5), the clamp (10) being fixedly mounted on the lower part of the cylinder rod (2).

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