Rotation judgment mechanism and hydraulic center rotation body mounting structure

Abstract

A rotation judgment mechanism and a hydraulic center rotation body mounting structure belong to the field of aerial work platforms, and comprise a slewing bearing, an outer ring of the slewing bearing is fixedly mounted on a chassis through a first fixing plate, and the bottom of an inner ring of the slewing bearing is fixedly connected with a rotation body of a hydraulic center rotation body through a second fixing plate; the second fixing plate is of a straight plate structure, a rotation judgment mechanism is fixedly arranged on the second fixing plate, a circular through hole is formed in the center of the first fixing plate, an arc-shaped detection plate is fixedly arranged on the side wall of the circular through hole, and the detection head is used for making contact with a detection face on the detection plate. The mounting hole position of the straight-plate-shaped second fixing plate borrows an inner ring threaded hole of the slewing bearing, the space utilization rate is high, the high-precision characteristic of the slewing bearing is utilized to ensure that the hydraulic center rotary body is located in the slewing center and the triggering and detection precision of a slewing judgment mechanism, circle run-out of the hydraulic center rotary body relative to the slewing center can be reduced, and the reliability of the hydraulic center rotary body is improved. And meanwhile, the detection angle is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of aerial work platforms, in particular to a rotation determination mechanism and a hydraulic center rotation body installation structure. Background Art

[0002] In the field of arm-type self-propelled aerial work platforms, the hydraulic center slewing body is a key component that connects the upper and lower parts and plays an important role such as providing a rotary hydraulic oil circuit. It is a mechanism that connects the turntable and the chassis oil supply channel and can rotate 360 ​​degrees. In addition, while the turntable rotates, a rotation determination device is required to detect the rotation angle of the turntable, thereby realizing a series of intelligent functions such as distinguishing operations, unilateral operations and intelligent collision avoidance.

[0003] There are two ways to install the existing hydraulic center rotating body. One is to install the hydraulic center rotating body on a turntable through two bending plates, and the other is to install the hydraulic center rotating body directly on the chassis; the rotation judgment device is generally installed on the turntable, and a single detection device corresponds to a single structure, that is, in order to achieve detection within a certain angle range, a separate detection plate is designed.

[0004] However, the existing installation method has many problems: (1) When the hydraulic center swivel is installed on the turntable, the hydraulic center swivel must be installed after the turntable and the chassis are assembled, which is not conducive to the installation of the hydraulic pipeline. At the same time, when the diameter of the swivel bearing becomes smaller, the installation of the hydraulic center swivel will be limited by space and difficult to install because the fixing plate for installing the hydraulic center swivel is a bent plate. (2) When the hydraulic center swivel is installed on the chassis, its installation structure is complex and difficult to disassemble, and the layout of the hydraulic pipeline is unreasonable. (3) The hydraulic center swivel is easy to deviate from the rotation center of the turntable, which increases the stress on the hydraulic pipeline and reduces its service life. (4) The rotation determination device has a problem of being unable to be triggered due to the eccentricity of the installation hole, which affects the accuracy of the rotation angle determination, and the detection accuracy cannot be guaranteed by using a single detection device corresponding to a single structure. Utility Model Content

[0005] In order to solve the technical problems in the above-mentioned background technology that the hydraulic center rotary body is difficult to install, and the installation accuracy and rotation angle detection accuracy are difficult to control, the utility model provides a rotation determination mechanism and a hydraulic center rotary body installation structure.

[0006] The technical solution of this utility model is as follows:

[0007] The utility model provides a rotation determination mechanism and a hydraulic center rotating body installation structure, comprising: a slewing bearing installed on a chassis, an outer ring of the slewing bearing fixedly installed on a first fixed plate, the first fixed plate being used for being fixedly installed on the chassis, and also comprising a hydraulic center rotating body, the bottom of the inner ring of the slewing bearing being fixedly connected with the rotating body of the hydraulic center rotating body through a second fixed plate, the second fixed plate being a straight plate structure, the second fixed plate being fixedly provided with a rotation determination mechanism, a circular through hole being provided at the center position of the first fixed plate, the circular through hole being coaxially arranged with the hydraulic center rotating body and the slewing bearing, an arc-shaped detection plate being fixedly provided on the side wall of the circular through hole, and a detection head of the rotation determination mechanism being used for contacting with the detection plate The detection surface contacts and utilizes the high-precision characteristics of the slewing bearing to ensure that the hydraulic center slewing body is located at the slewing center, which can reduce the circular runout of the hydraulic center slewing body relative to the slewing center, thereby reducing the stress on the hydraulic connecting pipeline of the hydraulic center slewing body, increasing the service life of the hydraulic pipeline, and improving the utilization rate of parts and space. Since the second fixed plate is a straight plate instead of a bent plate, the disadvantage of the bent plate occupying space is optimized, and it is easy to install even when the diameter of the slewing bearing becomes smaller. The installation of the hydraulic center slewing body is no longer restricted by space, and it is also convenient for its disassembly. At the same time, the high-precision characteristics of the slewing bearing are utilized to ensure the triggering and detection accuracy of the rotation determination mechanism, making the detection angle more accurate.

[0008] Preferably, two second fixed plates are provided, and the two second fixed plates are relatively arranged on both sides of the hydraulic center rotating body, so as to ensure the installation stability of the hydraulic center rotating body and the coaxial setting between the hydraulic center rotating body and the slewing bearing. A square through hole for the detection head to pass through is provided on the second fixed plate, which facilitates the arrangement of the detection head of the rotation determination mechanism.

[0009] Preferably, each second fixed plate is installed with a rotation determination mechanism, one rotation determination mechanism is installed above one second fixed plate, and the other rotation determination mechanism is installed below the other second fixed plate. The two rotation determination mechanisms are used in coordination with each other, which can effectively improve the detection accuracy of the rotation determination mechanism.

[0010] Preferably, the upper surface of the detection plate is the first detection surface, the side wall of the detection plate is the second detection surface, the detection head of one rotation determination mechanism cooperates with the first detection surface, and the detection head of another rotation determination mechanism cooperates with the second detection surface. Through the cooperation of the two detection surfaces and the two rotation determination mechanisms, the accuracy of the rotation angle detection is effectively guaranteed.

[0011] Preferably, a mounting groove is provided on the first fixed plate, and the slewing support is installed in the mounting groove. The upper surface height of the first detection surface is lower than the upper surface height of the mounting groove, thereby avoiding contact between the bolts between the second fixed plate and the bottom of the inner ring of the slewing support and the first detection surface, effectively preventing damage to the first detection surface, ensuring detection accuracy, and facilitating contact between the detection end of the rotation determination mechanism and the first detection surface.

[0012] Preferably, the rotation determination mechanism is fixedly mounted on the second fixed plate via a third fixed plate, and the third fixed plate is an L-shaped plate, which facilitates the installation and position adjustment of the rotation determination mechanism.

[0013] Preferably, there is an arc-shaped transition between the two ends of the detection plate and the inner wall of the first fixed plate, which plays a role of buffering and guiding to avoid collision damage between the rotation determination mechanism and the detection plate during the rotation process.

[0014] Preferably, a connecting rod is fixedly provided on the fixed body of the hydraulic center rotating body, a support limiter is fixedly provided in the chassis, a notch is provided on the support limiter, and one end of the connecting rod is inserted into the notch to support and limit the position of the fixed body of the hydraulic center rotating body, and to ensure that the fixed body does not rotate when the turntable rotates.

[0015] Preferably, the thickness of the second fixing plate is not greater than the height difference between the bottom of the inner ring and the bottom of the outer ring of the slewing bearing, thereby avoiding wear between the second fixing plate and the first fixing plate.

[0016] It can be seen from the above technical solutions that the advantages of the utility model are:

[0017] 1. The hydraulic center rotary body is fixedly connected to the bottom of the inner ring of the slewing bearing through the second fixed plate, and the slewing determination mechanism is installed on the second fixed plate. The hydraulic pipeline inside the chassis can be arranged in advance, which is convenient for installation. The installation hole position of the straight plate-shaped second fixed plate borrows the inner ring threaded hole of the slewing bearing, which has high space utilization and is easy to install even when the diameter of the slewing bearing becomes smaller. The installation of the hydraulic center rotary body is no longer restricted by space. The high-precision characteristics of the slewing bearing ensure that the hydraulic center rotary body is located at the slewing center, the slewing determination mechanism is triggered, and the detection accuracy is guaranteed. The circular runout of the hydraulic center rotary body relative to the slewing center can be reduced, and the force on the hydraulic connection pipeline of the hydraulic center rotary body can be reduced, while making the detection angle more accurate.

[0018] 2. The two rotation determination mechanisms detect the rotation angle of the first detection surface and the second detection surface respectively. The detection reference surfaces are different, and the two serve as auxiliary detection, making the turntable rotation angle detection more accurate and reliable; in addition, the rotation determination mechanism is installed on the slewing bearing through the second fixed plate, and the high-precision characteristics of the slewing bearing are used to ensure the triggering and detection accuracy of the rotation determination mechanism, making the detection angle more accurate.

[0019] 3. The upper surface height of the first detection surface is lower than the upper surface height of the mounting groove, which avoids the contact between the bolts between the second fixed plate and the bottom of the inner ring of the slewing support and the first detection surface, effectively prevents damage to the first detection surface, ensures the detection accuracy, and facilitates the contact between the detection end of the slewing determination mechanism and the first detection surface.

[0020] 4. There is an arc-shaped transition between the two ends of the detection plate and the inner wall of the first fixed plate, which plays a role of buffering and guiding to avoid collision and damage between the rotation determination mechanism and the detection plate during the rotation process.

[0021] 5. The thickness of the second fixing plate is not greater than the height difference between the bottom of the inner ring and the bottom of the outer ring of the slewing bearing, thereby avoiding wear between the second fixing plate and the first fixing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 It is a structural schematic diagram of a rotation determination mechanism and a hydraulic center rotating body installation structure according to one or more embodiments of the utility model;

[0024] Figure 2 It is a cross-sectional structural schematic diagram of a rotation determination mechanism and a hydraulic center rotating body installation structure according to one or more embodiments of the utility model;

[0025] Figure 3 It is a schematic structural diagram of a first fixing plate according to one or more embodiments of the present invention;

[0026] Figure 4 It is a schematic structural diagram of a second fixing plate according to one or more embodiments of the present invention;

[0027] The components represented by the reference numerals in the figure are:

[0028] 1. First fixed plate; 2. Slewing bearing; 3. Second fixed plate; 4. Slewing determination mechanism; 5. Third fixed plate; 6. Hydraulic center slewing body; 7. Chassis; 8. Support limiter; 9. Connecting rod; 10. Mounting groove; 11. First detection surface; 12. Second detection surface. DETAILED DESCRIPTION

[0029] 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.

[0030] In a typical implementation of the present invention, Figure 1-Figure 4 As shown, a rotation determination mechanism and a hydraulic center rotating body installation structure are proposed, including: a slewing bearing 2, which is fixedly installed on the chassis 7 of the aerial work vehicle to be used for the connection between the chassis 7 and the rotating structure.

[0031] Specifically, the slewing bearing 2 is fixedly mounted on the chassis 7 via the first fixing plate 1. Figure 3 As shown, a circular through hole is opened at the center of the first fixed plate 1, and an annular mounting groove 10 is provided on the upper surface of the first fixed plate 1. The mounting groove 10 is located on the circumferential side of the circular through hole for limiting the installation of the slewing bearing 2. The outer ring of the slewing bearing 2 is fixedly installed at the mounting groove 10 of the first fixed plate 1 by screws / bolts, and the slewing bearing 2 is coaxially arranged with the circular through hole. The first fixed plate 1 is fixedly installed on the chassis 7 by welding or other methods.

[0032] A detection plate is fixed on the first fixing plate 1. The detection plate is an arc-shaped plate. The detection plate is fixedly mounted on the side wall of the circular through hole. Figure 3 As shown, the detection plate has two detection surfaces, wherein the upper surface of the detection plate is a first detection surface 11, and the side wall of the detection plate is a second detection surface 12, so that the detection accuracy of the rotation angle can be improved by cooperating with the rotation determination mechanism 4 through the two detection surfaces.

[0033] In this embodiment, the detection angle of the detection plate is 90°, that is, the curvature of the detection plate is 90°. It can be understood that in other embodiments, the angle of the detection plate can also be other angles, which can be selected according to actual needs, and no excessive restrictions are made here.

[0034] There is an arc-shaped transition between the two ends of the detection plate and the inner wall of the first fixed plate 1, which plays a role of buffering and guiding to avoid collision damage between the rotation determination mechanism 4 and the detection plate during the rotation process.

[0035] The hydraulic center rotating body 6 is fixedly installed on the slewing bearing 2 through two second fixed plates 3. Specifically, the two second fixed plates 3 are relatively arranged on both sides of the hydraulic center rotating body 6, and the two second fixed plates 3 are symmetrically arranged relative to the axis of the hydraulic center rotating body 6. The hydraulic center rotating body 6 and the second fixed plates 3 are connected by bolts. The hydraulic center rotating body 6 is fixedly connected to the bottom of the inner ring of the slewing bearing 2 through the two second fixed plates 3 on both sides thereof. The hydraulic center rotating body 6 is coaxially arranged with the circular through holes of the slewing bearing 2 and the first fixed plate 1.

[0036] The slewing bearing 2 is an existing structure (such as publication number CN220033976U) including an inner ring and an outer ring, wherein the upper part of the inner ring is higher than the upper part of the outer ring, and the bottom of the inner ring is higher than the bottom of the outer ring. Figure 4 As shown, the second fixing plate 3 is a straight plate structure, and in this embodiment it is a fan-shaped straight plate. The second fixing plate 3 is connected to the threaded hole of the inner ring of the slewing bearing 2 by bolts. The second fixing plate 3 is located below the inner ring of the slewing bearing 2. The thickness of the second fixing plate 3 is not greater than the height difference between the bottom of the inner ring and the bottom of the outer ring of the slewing bearing 2, thereby avoiding wear between the second fixing plate 3 and the first fixing plate 1.

[0037] Among them, the hydraulic center rotating body 6 is divided into a fixed body and a rotating body. One end of the rotating body is inserted into the fixed body from the axial direction of the fixed body, and the other end of the rotating body extends outward from the fixed body. The rotating body is fixedly connected to the inner ring of the slewing bearing 2 through the second fixed plate 3. The hydraulic center rotating body 6 uses the inner ring threaded hole of the slewing bearing 2 to fix the second fixed plate 3, which improves the utilization rate of parts and space utilization. Since the second fixed plate 3 is a straight plate, not a bent plate, the disadvantage of the bent plate occupying space is optimized. It is easy to install even if the diameter of the slewing bearing 2 becomes smaller. The installation of the hydraulic center rotating body 6 is no longer limited by space, and it is also convenient for its disassembly.

[0038] This embodiment utilizes the high precision characteristics of the slewing bearing 2 to ensure that the hydraulic center rotating body 6 is located at the rotation center, which can reduce the circular runout of the hydraulic center rotating body 6 relative to the rotation center, thereby reducing the stress on the hydraulic connection pipeline of the hydraulic center rotating body 6 and increasing the service life of the hydraulic pipeline.

[0039] A square through hole and a plurality of bolt holes are provided on the second fixed plate 3, and the rotation determination mechanism 4 is fixedly mounted on the second fixed plate 3 by bolt connection. The detection end of the rotation determination mechanism 4 passes through the square through hole on the second fixed plate 3 and contacts the detection surface of the detection plate.

[0040] A rotation determination mechanism 4 is fixedly provided on each second fixed plate 3. The rotation determination mechanism 4 is a travel switch. The rotation determination mechanism 4 is fixedly connected to the second fixed plate 3 through the third fixed plate 5. The rotation determination mechanism 4 is fixedly installed on the third fixed plate 5 by bolts. The third fixed plate 5 and the second fixed plate 3 are connected by bolts.

[0041] The third fixed plate 5 is an L-shaped plate to facilitate the arrangement of the position of the rotation determination mechanism 4. Specifically, one rotation determination mechanism 4 is fixedly installed above a second fixed plate 3 through the third fixed plate 5, and the detection end of this rotation determination mechanism 4 passes through the square through hole corresponding to the second fixed plate 3 and contacts with the first detection surface 11 of the detection plate; another rotation determination mechanism 4 is fixedly installed below another second fixed plate 3 through the third fixed plate 5, and the detection end of this rotation determination mechanism 4 contacts with the second detection surface 12 of the detection plate.

[0042] Among them, the upper surface height of the first detection surface 11 of the detection plate is lower than the upper surface height of the mounting groove 10 on the first fixed plate 1. In this embodiment, the first detection surface 11 is 20 mm lower than the upper surface of the mounting groove 10, avoiding the contact between the bolts (the connecting bolts between the second fixed plate 3 and the bottom of the slewing bearing 2) and the first detection surface 11, effectively preventing damage to the first detection surface 11, ensuring the detection accuracy, and at the same time, facilitating the contact between the detection end of the rotation determination mechanism 4 and the first detection surface 11.

[0043] Since the two rotation determination mechanisms 4 detect the rotation angles of the first detection surface 11 and the second detection surface 12 respectively, and the detection reference surfaces are different, the two play a role of auxiliary detection, making the turntable rotation angle detection more accurate and reliable; in addition, the rotation determination mechanism 4 is installed on the slewing bearing 2 through the second fixed plate 3, and the high-precision characteristics of the slewing bearing 2 are used to ensure the triggering and detection accuracy of the rotation determination mechanism 4, so that the detection angle is more accurate.

[0044] The installation structure in this embodiment also includes a support limit member 8 and a connecting rod 9. The support limit member 8 is fixedly installed in the chassis 7 by welding or bolt connection. A notch is provided at the end of the support limit member 8. One end of the connecting rod 9 is fixedly installed on the outer wall of the fixed body of the hydraulic center rotating body 6, and the other end of the connecting rod 9 is inserted into the notch of the support limit member 8, so that the connecting rod 9 on the hydraulic center rotating body 6 can be clamped. Therefore, when the turntable rotates, it can be ensured that the fixed body of the hydraulic center rotating body 6 does not rotate.

[0045] During the actual installation, the second fixed plate 3 is fixed in advance to the bottom surface of the inner ring of the slewing bearing 2, and then the slewing bearing 2 is fixed on the first fixed plate 1 of the chassis 7, and finally the hydraulic center slewing body 6 equipped with a hydraulic joint (the joint needs to be tightened with a torque wrench) is directly placed inside the chassis 7 and connected to the second fixed plate 3. This installation method can arrange the hydraulic pipeline inside the chassis 7 in advance, which is convenient for installation, simple and convenient assembly and arrangement, and more reasonable assembly of the hydraulic pipeline, which combines the advantages of installing the hydraulic center slewing body 6 on the turntable or chassis 7, convenient disassembly, and being able to arrange the hydraulic pipeline in advance; the installation hole position of the second fixed plate 3 also borrows the inner ring threaded hole of the slewing bearing 2, and the space utilization rate is high; the second fixed plate 3 becomes a straight plate, not a bent plate, which optimizes the disadvantage of the bent plate occupying space, and is easy to install even when the diameter of the slewing bearing 2 becomes smaller, and the installation of the hydraulic center slewing body 6 is no longer limited by space, and it is also convenient for its disassembly.

[0046] 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 rotation determination mechanism and a hydraulic center rotation body installation structure, comprising: A slewing bearing (2) mounted on a chassis (7) is characterized in that an outer ring of the slewing bearing (2) is fixedly mounted on a first fixed plate (1), the first fixed plate (1) is used for being fixedly mounted on the chassis (7), and further comprises a hydraulic center slewing body (6), the inner ring bottom of the slewing bearing (2) is fixedly connected to the rotating body of the hydraulic center slewing body (6) through a second fixed plate (3), the fixed body of the hydraulic center slewing body (6) is connected to the chassis (7), the second fixed plate (3) is a straight plate structure, a slewing determination mechanism (4) is fixedly provided on the second fixed plate (3), a circular through hole is provided at the center position of the first fixed plate (1), the circular through hole is coaxially arranged with the hydraulic center slewing body (6) and the slewing bearing (2), and a detection plate cooperating with the slewing determination mechanism (4) is fixedly provided on the side wall of the circular through hole.

2. A rotation determination mechanism and a hydraulic center rotation body installation structure according to claim 1, characterized in that: Two second fixing plates (3) are provided, and the two second fixing plates (3) are arranged oppositely on two sides of the hydraulic center rotating body (6). The second fixing plates (3) are provided with square through holes for the detection head to pass through.

3. A rotation determination mechanism and a hydraulic center rotation body installation structure according to claim 2, characterized in that: A rotation determination mechanism (4) is installed on each second fixed plate (3), one rotation determination mechanism (4) is installed above one second fixed plate (3), and another rotation determination mechanism (4) is installed below another second fixed plate (3).

4. A rotation determination mechanism and a hydraulic center rotation body installation structure according to claim 3, characterized in that: The upper surface of the detection plate is a first detection surface (11), the side wall of the detection plate is a second detection surface (12), the detection head of one rotation determination mechanism (4) cooperates with the first detection surface (11), and the detection head of another rotation determination mechanism (4) cooperates with the second detection surface (12).

5. A rotation determination mechanism and a hydraulic center rotation body installation structure according to claim 4, characterized in that: The first fixed plate (1) is provided with a mounting groove (10), the slewing bearing (2) is mounted in the mounting groove (10), and the upper surface height of the first detection surface (11) is lower than the upper surface height of the mounting groove (10).

6. A rotation determination mechanism and a hydraulic center rotation body installation structure according to claim 3, characterized in that: The rotation determination mechanism (4) is fixedly mounted on the second fixing plate (3) via a third fixing plate (5), and the third fixing plate (5) is an L-shaped plate.

7. A rotation determination mechanism and a hydraulic center rotation body installation structure according to claim 1, characterized in that: There is an arc-shaped transition between the two ends of the detection plate and the inner wall of the first fixing plate (1).

8. The rotation determination mechanism and hydraulic center rotation body installation structure according to claim 1, characterized in that: A connecting rod (9) is fixedly provided on the fixed body of the hydraulic center rotating body (6), a supporting limiter (8) is fixedly provided in the chassis (7), a notch is provided on the supporting limiter (8), and one end of the connecting rod (9) is inserted into the notch.

9. A rotation determination mechanism and a hydraulic center rotation body installation structure according to claim 1, characterized in that: The thickness of the second fixing plate (3) is not greater than the height difference between the bottom of the inner ring and the bottom of the outer ring of the slewing bearing (2).

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