Self-locking slewing bearing with measurable rotating angle

Abstract

The utility model relates to a self-locking slewing bearing with a measurable rotating angle, which belongs to the technical field of slewing bearings and comprises a slewing bearing body, an angle measuring device and a self-locking device, the angle measuring device is arranged on one side of the slewing bearing body, and the self-locking device is arranged on the other side of the slewing bearing body. The slewing bearing body comprises a slewing bearing outer ring and a slewing bearing inner ring, the outer edge of the top of the slewing bearing inner ring is concave downwards to form a step structure for locking, one side of the slewing bearing inner ring is provided with an angle measuring device on the surface of the slewing bearing outer ring, and the other side of the slewing bearing inner ring is provided with a self-locking device on the surface of the slewing bearing outer ring; the self-locking device comprises a base, a telescopic pin, a spring and a pressing plate, the top end of the base is movably connected with the middle of the pressing plate through a rotating shaft, the lower surface of one end of the pressing plate is connected with the base through the spring, and the telescopic pin is arranged below the other end of the pressing plate and vertically arranged on the base; according to the slewing bearing, the rotation angle is measured in the operation process, the slewing bearing is locked, and the applicability is high.

Description

Technical Field

[0001] The utility model relates to a slewing support, in particular to a self-locking slewing support with measurable rotation angle, and belongs to the technical field of slewing supports. Background Art

[0002] Slewing bearings (also known as turntable bearings), as essential components of engineering and construction machinery, are crucial force transmission elements required for any machine requiring relative rotation between two parts while also bearing axial forces, radial forces, and overturning moments. They are widely used in industry and are often referred to as the "joints of machines." Slewing bearings are categorized by their structural type: single-row ball, three-row column, crossed roller, double-row eight-point contact ball, and combined ball-column. They are widely used in automotive cranes, port cranes, railway cranes, marine cranes, container cranes, metallurgical cranes, excavators, filling machines, navigation instruments, and in high-precision, cutting-edge applications such as CT standing wave therapy devices, radar antenna pedestals, missile launchers, tanks, robots, and revolving restaurants.

[0003] With the development of technology, the application fields of slewing bearings are becoming more and more extensive; however, the domestic market for slewing bearings with high precision, high load capacity and precisely controllable rotation angle is still very blank. For example, in the machining and robotics industries, the requirements for the measurement and control of rotation angles are becoming increasingly higher. Therefore, the slewing bearings used in machine tool turntables, dividing heads and robots are required to be able to accurately measure the rotation angle.

[0004] The current patent CN202032254U is a slewing support unit with a measurement and control device, which has a detection element set on the rotating body of the slewing support unit. Through the coordinated use of the detection element and the sensor, the operating angle or rotation arc of the slewing support unit is monitored in real time, thereby realizing high-precision measurement and control of the turntable; however, the outer ring of the slewing support unit is an integrated structure, and the detection element is set outside the outer ring or inside the inner ring. When it is set inside the inner ring, the sensor is also set inside the inner ring accordingly, which is unsafe, and has poor load-bearing capacity and stability. When it is used in high-precision fields such as rotating parts of robots and machine tools, it needs to be locked after rotating to the target angle. The current slewing support cannot realize the locking function after angle measurement, which makes its application range small and its applicability poor.

[0005] Therefore, developing a self-locking slewing bearing with measurable rotation angle that can overcome the above defects has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a self-locking slewing bearing with measurable angle, which can measure the rotation angle during operation and lock the slewing bearing, and has strong applicability.

[0007] In order to solve the above technical problems, the utility model provides a self-locking slewing support with measurable angle, comprising a slewing support body, an angle measuring device and a self-locking device. The angle measuring device is provided on one side of the slewing support body, and the self-locking device is provided on the other side.

[0008] The slewing bearing body includes a slewing bearing outer ring and a slewing bearing inner ring. The slewing bearing inner ring is rotatably arranged inside the slewing bearing outer ring. The top of the slewing bearing inner ring is higher than the top of the slewing bearing outer ring. The outer edge of the top of the slewing bearing inner ring is concave downward to form a step structure for locking. An angle measuring device is provided on one side of the slewing bearing inner ring, located on the surface of the slewing bearing outer ring. A self-locking device is provided on the other side of the slewing bearing inner ring, located on the surface of the slewing bearing outer ring.

[0009] The self-locking device includes a base, a telescopic pin, a spring and a pressure plate. The top of the base is movably connected to the middle of the pressure plate through a rotating shaft. The lower surface of one end of the pressure plate is connected to the base through a spring. A telescopic pin is provided below the other end of the pressure plate. The telescopic pin is vertically arranged on the base.

[0010] One end of the pressure plate is provided with a spring which abuts against the step of the inner ring of the slewing support, and the telescopic pin is extended and retracted up and down to loosen the pressure plate to realize the locking and loosening of the slewing support body.

[0011] The technical solution further defined in the present utility model is:

[0012] Furthermore, in the aforementioned self-locking slewing bearing with measurable angle, the detection device includes a steel scale ring and a steel scale ring reader. The steel scale ring is sleeved on the outer wall of the inner ring of the slewing bearing, and the steel scale ring reader arranged on the upper surface of the outer ring of the slewing bearing is pressed against the steel scale ring to read the angle.

[0013] Technical effect: The utility model adopts a steel scale ring position detection unit, which has low requirements for the working environment and can work normally in oil-immersed environment, grease environment, host vibration environment and other environments, making up for the shortcomings of the magnetic grid working environment. It can also be used in conjunction with a reader to read the angle in real time with high accuracy and high speed. The steel scale ring is set on the outer wall of the inner ring of the slewing bearing, which is easy to install and disassemble and has high safety.

[0014] In the aforementioned self-locking slewing bearing with measurable angle, one side of the base is recessed downward to form a spring fixing edge for connecting the spring, and the other side is recessed downward to form a telescopic pin fixing edge for fixing and connecting the telescopic pin. The height of the spring fixing edge on the base is greater than the height of the telescopic pin fixing edge.

[0015] Technical effect: The utility model is provided with an adaptive base, and a spring is provided on one side of the base to ensure that the pressure plate will be loosened, leave the step and will not move left and right all the time, affecting the rotation of the slewing bearing. A telescopic pin is provided on the other side of the base, and the telescopic pin requires a stroke for extension and retraction, so the height of the fixed side of the telescopic pin should be low, and the height of the fixed side of the spring on the base is greater than the height of the fixed side of the telescopic pin to ensure that in the loosened state, the pressure plate can be loosened under the action of the spring and will not swing left and right to affect the work. In the locked state, the telescopic rod extends to support the pressure plate, so that the pressure plate can press the inner ring of the slewing bearing to complete the locking work, ensuring the normal progress of the work.

[0016] In the aforementioned self-locking slewing bearing with measurable angle, the outer ring of the slewing bearing includes an upper outer ring and a lower outer ring. The upper outer ring of the slewing bearing is fixed to the upper surface of the lower outer ring of the slewing bearing by a shoulder screw through a positioning hole of the outer ring. A groove is formed between the upper outer ring of the slewing bearing, the lower outer ring of the slewing bearing and the inner ring of the slewing bearing. A cylindrical roller and a radial isolation block are arranged in the groove to realize rotation. The angle measuring device and the self-locking device are arranged on the surface of the upper outer ring of the slewing bearing.

[0017] Technical effect: The outer ring of the slewing bearing of the utility model includes an upper outer ring and a lower outer ring, which is easy to install, disassemble and maintain. It is a three-row column slewing bearing. The three-row column is selected mainly because it has a higher load-bearing capacity and stability.

[0018] In the aforementioned self-locking slewing bearing with measurable angle, cylindrical rollers and window-type isolation blocks are provided between the outer upper ring of the slewing bearing and the inner ring of the slewing bearing; cylindrical rollers and window-type isolation blocks are provided between the outer lower ring of the slewing bearing and the inner ring of the slewing bearing; and the window-type isolation blocks are sleeved on the cylindrical rollers. Technical effect: The outer upper ring and outer lower ring of the slewing bearing of the utility model are connected to the inner ring of the slewing bearing by cylindrical rollers provided in the upper and lower raceways, respectively. Each cylindrical roller is sleeved with a window-type isolation block, ensuring that the upper and lower rollers are in contact with the raceway surface while the rollers are in contact with each other through the window-type isolation blocks. The cylindrical rollers and radial isolation blocks provided in the vertical raceways enable the inner ring of the slewing bearing to rotate within the outer ring. Compared with the general single-row ball slewing bearing, the three-row column slewing bearing using cylindrical rollers has higher load-bearing capacity and stability.

[0019] In the aforementioned self-locking slewing bearing with measurable rotation angle, a sealing strip is provided between the inner ring of the slewing bearing and the outer upper ring of the slewing bearing.

[0020] In the aforementioned self-locking slewing bearing with measurable rotation angle, a sealing strip is provided between the inner ring of the slewing bearing and the outer lower ring of the slewing bearing.

[0021] Technical effect: sealing strips are provided inside the inner and outer rings of the slewing bearing to increase sealing, prevent dust and foreign matter from entering the raceway, and ensure working quality.

[0022] In the aforementioned self-locking slewing bearing with measurable rotation angle, a rubber layer is provided on the step on the inner ring of the slewing bearing that contacts the pressure plate.

[0023] Technical effect: rubber is provided on the contact surface between the locking device and the step to increase friction and enhance the locking effect.

[0024] The beneficial effects of the utility model are:

[0025] Ways to measure the slewing bearing angle and achieve self-locking:

[0026] 1. During the operation of the slewing bearing, the steel scale ring reader installed on the outer upper ring measures the rotation angle of the steel scale ring installed on the inner ring, thereby realizing the measurement of the rotation angle during the operation of the slewing bearing.

[0027] 2. After the slewing bearing reaches the appropriate angle, extend the telescopic pin to push the pressure plate upwards so that the pressure plate presses the inner ring of the slewing bearing and the slewing bearing is locked;

[0028] 3. When the slewing bearing needs to be switched from a locked state to a loosened state, the telescopic pin retracts and the pressure plate is lifted upward by the spring, allowing the slewing bearing to rotate normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural diagram of a self-locking slewing bearing with measurable rotation angle according to an embodiment of the present utility model;

[0030] Figure 2 for Figure 1 Structural diagram of the self-locking device in the locked state;

[0031] Figure 3 for Figure 1 Structural diagram of the self-locking device in the released state;

[0032] In the figure: 1-slewing bearing outer upper ring, 2-slewing bearing inner ring, 3-slewing bearing outer lower ring, 4-cylindrical roller, 5-window type isolation block, 6-sealing strip, 8-shoulder head screw for outer ring positioning hole, 9-steel scale ring, 10-steel scale ring reader, 11-base, 12-pressure plate, 13-telescopic pin, 14-spring. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments; the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention. Example 1

[0034] This embodiment provides a self-locking slewing bearing with measurable angle, see Figure 1 , including a slewing support body, an angle measuring device and a self-locking device, wherein the angle measuring device is provided on one side of the slewing support body and the self-locking device is provided on the other side;

[0035] The slewing bearing body includes a slewing bearing outer ring and a slewing bearing inner ring 2. The slewing bearing inner ring 2 is rotatably arranged in the slewing bearing outer ring. The slewing bearing outer ring includes a slewing bearing outer upper ring 1 and a slewing bearing outer lower ring 3. The slewing bearing outer upper ring 1 is fixed to the upper surface of the slewing bearing outer lower ring 3 by a shoulder screw 8 through the outer ring positioning hole. A groove is formed between the slewing bearing outer upper ring 1, the slewing bearing outer lower ring 3 and the slewing bearing inner ring 2. A cylindrical roller 4 and a radial isolation block are provided in the groove to realize rotation. An angle measuring device and a self-locking device are provided on the surface of the slewing bearing outer upper ring 1; the top of the slewing bearing inner ring 2 is higher than the top of the slewing bearing outer ring, and the outer edge of the top of the slewing bearing inner ring 2 is concave downward to form a step structure for locking. One side of the slewing bearing inner ring 2 is located on the surface of the slewing bearing outer ring and a self-locking device is provided on the surface of the slewing bearing outer ring; the other side of the slewing bearing inner ring 2 is located on the surface of the slewing bearing outer ring and a self-locking device is provided;

[0036] The detection device includes a steel scale ring 9 and a steel scale ring reader 10. The steel scale ring 9 is sleeved on the outer wall of the slewing bearing inner ring 2. The steel scale ring reader 10, which is arranged on the upper surface of the slewing bearing outer ring, abuts against the steel scale ring 9 to read the angle.

[0037] See Figure 2-3 The self-locking device includes a base 11, a telescopic pin 13, a spring 14 and a pressure plate 12. One side of the base 11 is recessed downward to form a spring fixing edge for connecting the spring 14, and the other side is recessed downward to form a telescopic pin fixing edge for fixing the telescopic pin 13. The height of the spring fixing edge on the base 11 is greater than the height of the telescopic pin fixing edge. The top of the base 11 is movably connected to the middle of the pressure plate 12 through a rotating shaft. The lower surface of one end of the pressure plate 12 is connected to the base 11 through a spring 14. A telescopic pin 13 is provided below the other end of the pressure plate 12, and the telescopic pin 13 is vertically arranged on the base 11.

[0038] The pressure plate 12 is provided with one end of a spring 14 which rests on the step of the slewing bearing inner ring 2. The step is provided with a rubber layer. The telescopic pin 13 stretches and retracts up and down to loosen the pressure plate 12 to achieve the locking and loosening of the slewing bearing body.

[0039] In this embodiment, cylindrical rollers 4 and window-type isolation blocks 5 are provided between the slewing bearing outer upper ring 1 and the slewing bearing inner ring 2; cylindrical rollers 4 and window-type isolation blocks 5 are provided between the slewing bearing outer lower ring 3 and the slewing bearing inner ring 2, and the window-type isolation blocks 5 are sleeved on the cylindrical rollers 4.

[0040] In this embodiment, a sealing strip 6 is provided between the slewing bearing inner ring 2 and the slewing bearing outer upper ring 1 ; and a sealing strip 6 is provided between the slewing bearing inner ring 2 and the slewing bearing outer lower ring 3 .

[0041] When assembling the utility model, the assembly process of the self-locking slewing bearing with measurable rotation angle is as follows: slewing bearing outer lower ring 3 → install cylindrical roller 4 and window type isolation block 5 on the slewing support outer lower ring, install cylindrical roller 4 and radial isolation block 7 between inner and outer rings → install slewing bearing inner ring 2 → install cylindrical roller 4 and window type isolation block 5 on the slewing bearing outer upper ring → install slewing bearing outer upper ring 1 → shoulder head screw 8 for outer ring positioning hole → add grease → install sealing strip 6 → install steel scale ring 9 → install steel scale ring reader 10 → install self-locking device.

[0042] The utility model can measure the rotation angle of the slewing bearing in real time through the steel scale ring and the steel scale ring reader, with high detection accuracy, rapidity and high efficiency. After rotating to a suitable angle, the telescopic pin presses the pressure plate upward, so that the pressure plate presses the inner ring of the slewing bearing, thereby realizing the locking of the slewing bearing. When the telescopic pin retracts, the pressure plate is released under the action of the spring. Through the above process, the measurement, locking and release of the rotation angle during the operation of the slewing bearing are realized, and the adaptability is good.

[0043] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the present invention.

Claims

1. A self-locking slewing bearing with measurable rotation angle, characterized by: It includes a slewing support body, an angle measuring device and a self-locking device. The angle measuring device is provided on one side of the slewing support body, and the self-locking device is provided on the other side. The slewing bearing body comprises a slewing bearing outer ring and a slewing bearing inner ring (2), the slewing bearing inner ring (2) is rotatably arranged in the slewing bearing outer ring, the top of the slewing bearing inner ring (2) is higher than the top of the slewing bearing outer ring, the outer edge of the top of the slewing bearing inner ring (2) is concave downward to form a step structure for locking, one side of the slewing bearing inner ring (2) is located on the surface of the slewing bearing outer ring and is provided with the angle measuring device, and the other side of the slewing bearing inner ring (2) is located on the surface of the slewing bearing outer ring and is provided with the self-locking device; The self-locking device comprises a base (11), a telescopic pin (13), a spring (14) and a pressure plate (12); the top end of the base (11) is movably connected to the middle part of the pressure plate (12) via a rotating shaft; the lower surface of one end of the pressure plate (12) is connected to the base (11) via the spring (14); the telescopic pin (13) is provided below the other end of the pressure plate (12); and the telescopic pin (13) is vertically arranged on the base (11); The pressure plate (12) is provided with a spring (14) whose end abuts against the step of the slewing bearing inner ring (2), and the telescopic pin (13) is extended and retracted up and down to loosen the pressure plate (12) to achieve locking and loosening of the slewing bearing body.

2. The self-locking slewing bearing with measurable rotation angle according to claim 1, characterized in that: The angle measuring device comprises a steel scale ring (9) and a steel scale ring reader (10), wherein the steel scale ring (9) is sleeved on the outer wall of the slewing bearing inner ring (2), and the steel scale ring reader (10) arranged on the upper surface of the slewing bearing outer ring abuts against the steel scale ring (9) to read the angle.

3. The self-locking slewing bearing with measurable rotation angle according to claim 1, characterized in that: One side of the base (11) is recessed downward to form a spring fixing edge for connecting the spring (14), and the other side is recessed downward to form a telescopic pin fixing edge for fixedly connecting the telescopic pin (13). The height of the spring fixing edge on the base (11) is greater than the height of the telescopic pin fixing edge.

4. The self-locking slewing bearing with measurable rotation angle according to claim 1, characterized in that: The slewing bearing outer ring comprises a slewing bearing outer upper ring (1) and a slewing bearing outer lower ring (3), wherein the slewing bearing outer upper ring (1) is fixedly arranged on the upper surface of the slewing bearing outer lower ring (3) by a shaft shoulder screw (8) through an outer ring positioning hole, a groove is formed between the slewing bearing outer upper ring (1), the slewing bearing outer lower ring (3) and the slewing bearing inner ring (2), a cylindrical roller (4) and a radial isolation block are arranged in the groove to realize rotation, and the angle measuring device and the self-locking device are arranged on the surface of the slewing bearing outer upper ring (1).

5. The self-locking slewing bearing with measurable rotation angle according to claim 4, characterized in that: A cylindrical roller (4) and a window-type isolation block (5) are provided between the outer upper ring (1) of the slewing bearing and the inner ring (2) of the slewing bearing; a cylindrical roller (4) and a window-type isolation block (5) are provided between the outer lower ring (3) of the slewing bearing and the inner ring (2) of the slewing bearing; and the window-type isolation block (5) is sleeved on the cylindrical roller (4).

6. The self-locking slewing bearing with measurable rotation angle according to claim 4, characterized in that: A sealing strip (6) is provided between the slewing bearing inner ring (2) and the slewing bearing outer upper ring (1).

7. The self-locking slewing bearing with measurable rotation angle according to claim 4, characterized in that: A sealing strip (6) is provided between the slewing bearing inner ring (2) and the slewing bearing outer lower ring (3).

8. The self-locking slewing bearing with measurable rotation angle according to claim 1, characterized in that: A rubber layer is provided on the step on the slewing bearing inner ring (2) that contacts the pressure plate (12).

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