CN105465226B

CN105465226B - Slewing bearing

Info

Publication number: CN105465226B
Application number: CN201410313127.9A
Authority: CN
Inventors: 潘仁会; 沈彦斌; 张建昌
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2014-07-02
Filing date: 2014-07-02
Publication date: 2019-11-15
Anticipated expiration: 2034-07-02
Also published as: CN105465226A

Abstract

A slewing bearing comprising: the rolling bearing comprises an inner ring, an outer ring and a plurality of rolling bodies positioned between the inner ring and the outer ring; one of the inner ring and the outer ring is a rotating ring, and the other ring is a non-rotating ring; a supporting piece is arranged on the non-rotating ring at one axial end of the slewing bearing, and the supporting piece axially faces away from the surfaces of the rolling bodies, and an inner ring and an outer ring enclose a containing chamber; at least two brake mechanisms are arranged in the accommodating chamber, wherein at least one brake mechanism is used for locking and unlocking when the rotating ring rotates clockwise, and the other at least one brake mechanism is used for locking and unlocking when the rotating ring rotates anticlockwise. The brake mechanism is integrated into the slewing bearing by means of a support. Therefore, the application occasion of the slewing bearing cannot be limited by the braking mechanism, and the installation process is simple and convenient.

Description

Slewing bearing

Technical Field

The invention relates to a bearing, in particular to a slewing bearing.

Background

The prior art slewing bearing cannot be mounted to an external slewing structure in the axial direction in the case where the mounting space of one of the mounting sides is limited. To solve the above problems, the applicant has proposed a solution to solve the above problems, which is:

referring to fig. 1, the slewing bearing includes an inner ring 1, an outer ring 2 surrounding the inner ring 1, and an outer ring 3 surrounding the inner ring 1 and connected to the inner ring 1, wherein the outer ring 3 is axially opposite to the outer ring 2, and two sets of rolling elements 4 spaced from each other are disposed between the inner ring 1 and the outer ring 2.

The end face of the outer ring 3, which is back to the outside of the outer ring 2, is provided with a plurality of first threaded holes 31 which are arranged at intervals along the circumferential direction, and the central axis of each first threaded hole 31 is parallel to the central axis of the outer ring 3. A plurality of second threaded holes (not shown in the figure) which are arranged at intervals along the circumferential direction are arranged on the end surface of the outer ring 2 which is not opposite to the outer ring 3 in the axial direction, and the central axis of each second threaded hole is parallel to the central axis of the outer ring 2. When the inner ring 1 rotates and the outer ring 2 does not rotate, the inner ring 1 is installed with a rotary arm of a rotary structure through a first threaded hole 31, and the outer ring 2 is fixed on a rack through a second threaded hole.

Referring to fig. 1, on the side of the inner ring 1 not provided with the outer ring 3, a plurality of third threaded holes 13 are arranged in the end surface of the inner ring 1 at intervals along the circumferential direction, and the third threaded holes 13 are used for installing the inner ring 1 and an external braking mechanism to realize locking and unlocking of the inner ring 1.

This presents two problems: 1. the application occasions of the slewing bearing are limited by the external braking mechanism, for example, the slewing bearing with the external braking mechanism cannot be applied to the occasions with narrow installation space; 2. the braking mechanism and the slewing bearing are two relatively independent components, and the braking mechanism and the slewing bearing need to be respectively installed in the application process, so that the process is complicated and the installation is inconvenient.

Disclosure of Invention

The invention solves the problems that: 1. the application occasions of the slewing bearing are limited by the external braking mechanism, for example, the slewing bearing with the external braking mechanism cannot be applied to the occasions with narrow installation space;

2. the braking mechanism and the slewing bearing are two relatively independent components, and the braking mechanism and the slewing bearing need to be respectively installed in the application process, so that the process is complicated and the installation is inconvenient.

To solve the above problems, the present invention provides a slewing bearing, comprising: the rolling bearing comprises an inner ring, an outer ring and a plurality of rolling bodies positioned between the inner ring and the outer ring; one of the inner ring and the outer ring is a rotating ring, and the other ring is a non-rotating ring; a supporting piece is arranged on the non-rotating ring at one axial end of the slewing bearing, and the supporting piece axially faces away from the surfaces of the rolling bodies, and an inner ring and an outer ring enclose a containing chamber; at least two brake mechanisms are arranged in the accommodating chamber, wherein at least one brake mechanism is used for locking and unlocking when the rotating ring rotates clockwise, and the other at least one brake mechanism is used for locking and unlocking when the rotating ring rotates anticlockwise.

Optionally, at least two receiving grooves are arranged in the receiving chamber along the circumferential direction of the non-rotating ring, the receiving grooves are divided into two parts, and the radial dimension of the joint of the two parts is the smallest; a braking mechanism is disposed in each of the receiving slots, each of the braking mechanisms including: the elastic piece, the driving piece and the locking piece are positioned between the elastic piece and the driving piece, the elastic piece and the locking piece are positioned at one part of the accommodating groove, the locking piece is closer to the joint, and the driving piece is positioned at the other part of the accommodating groove; in at least two braking mechanisms, along a circumferential direction of the non-rotating ring, the arrangement of at least one braking mechanism is as follows in sequence: elastic component, locking piece and driving piece, and arrange in at least one other arrestment mechanism in proper order: the driving piece, the locking piece and the elastic piece; the rotating ring and the non-rotating ring are in a locking state, and the locking piece is clamped between the rotating ring and the non-rotating ring under the action of the elastic force of the elastic piece; the rotating ring and the non-rotating ring are in an unlocking state, and the locking piece is kept in the accommodating groove part where the elastic piece is located under the action of driving force of the driving piece in the opposite direction to the elastic force.

Optionally, the inner ring is a rotating ring and the outer ring is a non-rotating ring, and an annular ring fixedly connected with the inner ring is sleeved outside the inner ring; the annular ring is opposite to the outer ring in the radial direction and is separated from the outer ring, and when the inner ring and the outer ring are in a locking state, the locking piece is respectively propped against the outer ring and the annular ring in the radial direction.

Optionally, the number of the braking mechanisms is an even number which is not less than four, and the number of the braking mechanisms arranged in sequence according to the elastic member, the locking member and the driving member is the same as the number of the braking mechanisms arranged in sequence according to the driving member, the locking member and the elastic member along a circumferential direction of the non-rotating ring.

Optionally, in two adjacent braking mechanisms, along a circumferential direction of the non-rotating ring, the arrangement in one braking mechanism is sequentially the elastic member, the locking member, and the driving member, and the arrangement in the other braking mechanism is sequentially the driving member, the locking member, and the elastic member.

Optionally, all the braking mechanisms are arranged at equal intervals along the circumferential direction of the non-rotating ring.

Optionally, in each braking mechanism, a connecting piece is arranged at the other end, opposite to the locking piece, of the elastic piece, and the connecting piece is connected with the elastic piece; in two adjacent braking mechanisms with the elastic parts arranged oppositely, the connecting parts of the two elastic parts are fixedly connected with the supporting part at the same mounting position.

Optionally, the driving piece is a one-way cylinder, the one-way cylinder includes a cylinder body and a piston rod, one end of the piston rod extends into the cylinder body, and the other end of the piston rod is opposite to the locking piece.

Optionally, the elastic member includes: the shell is provided with an opening, and the opening faces the locking piece; a coil spring located in the housing; and the pushing block is positioned between the spiral spring and the locking piece along the central axis direction of the spiral spring and is respectively abutted against the spiral spring and the locking piece.

Optionally, the locking member is a cylinder, and a central axis of the cylinder is parallel to a central axis of the inner ring.

Optionally, the non-rotating ring has a groove extending in a circumferential direction along a surface facing the rotating ring in the radial direction; along the axis direction of the non-rotating ring, the groove is provided with an opening which extends to the end face of the non-rotating ring from the outer ring and a bottom face which faces away from the outer ring, and the supporting piece is positioned on the bottom face of the groove and is connected with the bottom face of the groove through a bolt.

Optionally, in the receiving groove, a surface of the non-rotating ring radially opposite to the rotating ring is: a plane; or an arc surface protruding toward the rotating ring in the radial direction; or a paraboloid which protrudes radially towards the rotating collar.

Optionally, the support is annular and coaxial with the non-rotating ring; or the number of the supporting pieces is at least two, all the supporting pieces are distributed at intervals along the circumferential direction of the non-rotating ring, each supporting piece corresponds to one accommodating chamber, and at least one accommodating groove is formed in each accommodating chamber.

Compared with the prior art, the technical scheme of the invention has the following advantages:

the braking mechanism is integrated into the slewing bearing through the supporting piece, so that the braking mechanism cannot limit the application occasion of the slewing bearing, and the installation process is simple and convenient.

Drawings

FIG. 1 is a schematic cross-sectional view of a slewing bearing of a patent application filed by the applicant;

FIG. 2 is a top view of a slew bearing of an exemplary embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view along AA in FIG. 2;

fig. 4 is a partial perspective cross-sectional view of the position of the outer ring for mounting the support member in the slewing bearing corresponding to fig. 2.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Referring to fig. 2 and 3, the slewing bearing includes: the bearing comprises a rotating inner ring 10, a non-rotating outer ring 20 and a plurality of rolling bodies 30 positioned between the inner ring 10 and the outer ring 20, wherein the plurality of rolling bodies 30 form two groups of angular contact thrust bearings, the inner ring 10 and the outer ring 20 are coaxial, the inner ring 10 can rotate relative to the outer ring 20, a plurality of threaded holes 26 are formed in the end face of one axial end of the outer ring 20, and a mounting surface of a rotary structure is connected with the outer ring 20 through the threaded holes 26. A radial gap 21 is provided between the end of the outer ring 20 having the threaded bore 26 and the inner ring 10, and a support 22 fixedly connected to the outer ring 20 is provided in the radial gap 21, the support 22 being annular and coaxial with the outer ring 20. The support member 22 has two surfaces 220 facing away from each other in the axial direction and spaced apart from the inner ring 10, so that the inner ring 10 does not touch the support member 22 when rotating. The surface 220 of the support 22 opposite the rolling bodies 30, the inner ring 10 and the outer ring 20 enclose a receiving space 23. An annular ring 11 is also arranged in the radial gap 21, which is fitted over the inner ring 10 and is fixedly connected to the inner ring 10, the annular ring 11 also being located in the receiving space 23, but spaced apart from the support 22.

Four receiving grooves 230 are provided in the receiving chamber 23 in the circumferential direction of the outer ring 20, and in each receiving groove 230, the surface of the outer ring 20 facing the inner ring 10 in the radial direction is a curved surface that protrudes toward the inner ring 10 in the radial direction, so that each receiving groove 230 is divided into two parts whose radial dimension at the junction is the smallest. One detent mechanism 50 is provided in each of the receiving grooves 230. Each braking mechanism 50 includes: the elastic piece 51, the driving piece 52 and the locking piece 53 located between the elastic piece 51 and the driving piece 52, wherein the elastic piece 51 and the locking piece 53 are located at one part of the accommodating groove, the locking piece 53 is closer to the joint, and the driving piece 52 is located at the other part of the accommodating groove. The elastic member 51 and the driving member 52 are both connected to the supporting member 22, and the driving member 52 includes a telescopic member 521 facing the elastic member 51. In two of the braking mechanisms 50, as shown in fig. 2, the two braking mechanisms 50 at the upper left corner and the upper right corner are arranged in the following order along a circumferential direction X of the outer ring 20: the elastic member 51, the locking member 53 and the driving member 52 are arranged in the braking mechanism 50 at the upper right corner in sequence: a driving member 52, a locking member and an elastic member 51. When the inner ring 10 and the outer ring 20 are in the locked state, the elastic member 51 is in a compressed state and applies an elastic force to the locking member 53, and the locking member 53 is clamped between the inner ring 10 and the outer ring 20 by the elastic force and radially abuts against the annular ring 11 and the outer ring 20, respectively, which can be achieved by making the size of the locking member 53 in the radial direction of the outer ring 20 larger than the width of the joint of the two parts of the accommodating groove 230. When the inner ring 10 and the outer ring 20 are in the unlocked state, the expansion piece 521 is driven to extend, and the lock piece 53 is driven by the driving force of the expansion piece 521 in the opposite direction of the elastic force of the elastic piece and is held in the accommodation groove portion where the elastic piece 51 is located.

During the operation of the slewing bearing, the locking member 53 is held in the accommodation groove portion in which the elastic member 51 is located, and the inner ring 10 rotates without being hindered. When the slewing bearing is converted from the unlocked state to the locked state, if the inner ring 10 rotates clockwise, the thrust force applied to the locking members 53 by all the driving members 52 is removed, and all the locking members 53 are moved toward the driving members 52 by the elastic force. In the upper right corner brake mechanism 50, the lock piece 53 is also subjected to the frictional force in the same direction as the elastic force of the elastic piece 51, which is applied by the annular ring 11 when contacting the annular ring 11, and the lock piece 53 moves by the elastic force and the frictional force of the annular ring 11, and since the width of the middle portion of the accommodating groove is narrow, the lock piece 53 is gradually clamped between the annular ring 11 and the outer ring 20 in the middle portion of the accommodating groove when moving to a narrow region. Friction exists between the inner circumferential surface of the locking piece 53 and the outer ring 20, an included angle between a tangent line of a contact point of the locking piece 53 and the outer ring 20 and a tangent line of a contact point of the locking piece 53 and the annular ring 11 is smaller than a friction angle between the locking piece 53 and the annular ring 11 (wherein the friction angle is an arc tangent value of a friction coefficient and is related to materials of the locking piece 53 and the annular ring 11), and meanwhile, the outer ring 20 is fixed and does not rotate, so the friction plays a limiting role on the locking piece 53, the inner ring 10 stops rotating by means of the friction force applied to the annular ring 11 by the locking piece 53, and the purpose of locking is achieved. Similarly, if the inner ring 10 rotates counterclockwise, the locking member 53 of the upper left corner braking mechanism 50 achieves the purpose of locking the inner ring 10.

In addition, the lower left corner brake mechanism can realize clockwise braking, and the lower right corner brake mechanism can realize anticlockwise braking. That is, the slewing bearing of the present embodiment can achieve both clockwise and counterclockwise braking. Besides the brake mechanism of the embodiment, the brake mechanism with other structures can be arranged to realize bidirectional locking and unlocking of the inner ring.

In this embodiment, the braking mechanism is integrated into the slewing bearing by means of a support. Therefore, the brake mechanism can not limit the application occasion of the slewing bearing, and the installation process is simple and convenient.

Referring to fig. 3, the slewing bearing further includes a coil 60 surrounding the inner ring 10 and threadedly coupled to the inner ring 10, wherein the coil 60 is located between the support 22 and the two sets of angular contact thrust bearings, and no interference occurs between the support 22 and the coil 60. The screw ring 60 exerts an axial pretension effect on the two sets of angular contact thrust bearings, ensuring that the rolling elements do not disengage from the raceways. In the mounting process of the slewing bearing, firstly, two groups of angular contact thrust bearings are mounted between the inner ring 10 and the outer ring 20; then screwing and installing a screw ring 60 on the inner ring 10; thereafter, the support member 22 and the brake mechanism 50 on the support member 22 are mounted on the outer race 20.

Referring to fig. 2, in the present embodiment, an annular ring 11 is sleeved on the inner ring 10, and the annular ring 11 is fixedly connected with the inner ring 10 through two radially opposite positioning pins 12, or the annular ring and the inner ring may be welded, integrally formed, or connected in other manners. In other embodiments, the inner ring may not be provided with an annular ring. Compared with the annular ring which is not arranged, the annular ring 11 relatively increases the outer diameter of the inner ring at the position of the radial gap 21, reduces the radial width of the accommodating groove, so that the diameter of the existing cylindrical roller is larger than the width of the middle part of the accommodating groove, the existing cylindrical roller can meet the locking requirement, a new locking piece does not need to be designed and manufactured, and the process cost is saved.

In the present embodiment, the number of the receiving grooves 230 is four, and accordingly, the number of the braking mechanisms 50 is four, but not limited thereto. The method can also be as follows: the number of the accommodating grooves is two or more, and correspondingly, the number of the braking mechanisms is two or more, but the following steps are ensured: along a circumferential direction of the outer ring, the arrangement of at least one brake mechanism is as follows in sequence: elastic component, locking piece, driving piece, arrange in at least one arrestment mechanism in addition in proper order and be: driving piece, locking piece, elastic component. Therefore, the brake mechanism can realize the counterclockwise and clockwise bidirectional braking. In a specific embodiment, there may be provided: the braking mechanism capable of realizing clockwise braking of the slewing bearing is more than two, and the braking mechanism capable of realizing anticlockwise braking of the slewing bearing is more than two, and the braking mechanisms can simultaneously act during braking at each time, so that rapid braking can be realized.

In a specific embodiment, the following may also be: the number of the braking mechanisms is not less than four, the number of the braking mechanisms arranged sequentially according to the elastic piece, the locking piece and the driving piece and the number of the braking mechanisms arranged sequentially according to the driving piece, the locking piece and the elastic piece are the same along the circumferential direction of the outer ring, namely the number of the braking mechanisms capable of realizing clockwise braking is the same as the number of the braking mechanisms capable of realizing anticlockwise braking. In this way, the time required for each braking and the effect achieved by the braking are similar or even identical, and the performance of the slewing bearing and the device using the slewing bearing is balanced. Further, in two adjacent arbitrary arrestment mechanisms, along a circumferential direction of outer lane, arrange in proper order for elastic component, locking piece and driving piece in one of them arrestment mechanism, and arrange in proper order in another arrestment mechanism and be: the driving piece, the locking piece and the elastic piece; all the brake mechanisms are arranged at equal intervals along the circumferential direction of the outer ring. Therefore, when the brake is carried out each time, the locking piece can generate radial pressure on the inner ring, the radial pressure on the inner ring is uniformly distributed, the damage to the inner ring caused by the pressure concentrated in a certain area is avoided, and the service life of the inner ring and the service life of the slewing bearing are prolonged.

In addition, in order to minimize the radial dimension of the joint of the two parts of the receiving groove 230, the surface of the outer ring 20 radially opposite to the inner ring 10 in the receiving groove 230 is a flat surface; or an arc surface protruding toward the inner ring 10 along the radial direction of the inner ring 10; or a paraboloid which protrudes toward the inner ring 10 in the radial direction of the inner ring 10. If in other embodiments the inner ring is non-rotating and the outer ring is rotating, the surface of the inner ring facing the outer ring in the radial direction in the receiving groove may be arranged as described above.

Referring to fig. 2, the driver 52 is a one-way cylinder. The one-way cylinder comprises a cylinder body 520, the cylinder body 520 is connected with the support 22 by bolts or other feasible connection modes, such as welding; a piston in the cylinder 520, a coil spring (not shown) at one end of the piston, and a piston rod as a telescopic member 521, the cylinder 520 being held on the support member 22, one end of the piston rod extending into the cylinder 520 and the other end being disposed opposite to the locking member 53, the one end of the piston rod extending into the cylinder 520 being connected to the piston. When air pressure is applied to the piston, the piston rod is driven to move towards the locking member 53. When the air pressure disappears, the spiral spring in the cylinder body drives the piston to return. In the application, it should be ensured that: the cylinder 520 does not interfere with the rotation of the inner race 10. Because the locking state is the normal state of the slewing bearing, air pressure does not need to be provided for the air cylinder in the locking state, and energy can be saved. In addition, when the rotary support is in an unlocked state, the air pressure required by the one-way air cylinder is low, so that only a small inflation device needs to be arranged in the application occasion of the rotary support, and the application occasion of the rotary support is not limited by space.

The elastic member 51 of the present embodiment includes: a housing 510 having an opening facing the locking member 53, wherein the housing 510 is connected to the supporting member 22 by bolts or other suitable connection means, such as welding; a coil spring 511 located in the housing 510; and a push block 512 positioned between the coil spring 511 and the locking member 53 along the central axis of the coil spring 511, wherein the push block 512 abuts against the coil spring 511 and the locking member 53, respectively. Wherein the push block 512 is wholly or partially located in the housing 510. Thus, the housing 510 encloses the coil spring 511, and the coil spring 511 is prevented from jumping, thereby retaining the coil spring 511. Since the lock member 53 is subjected to the friction force of the inner ring 10 during braking, there is a possibility of rotation, and therefore the lock member 53 and the push block 512 are not connected together. The push block 512 is in closer contact with the lock member 53 than the lock member is in direct contact with the coil spring, and the lock member 53 is more secure.

With continued reference to fig. 2, in each braking mechanism 50, the other end of the housing 510 of the elastic member 51 opposite to the locking member 53 is provided with a connecting member 513, and the connecting member 513 is in the form of a plate and is connected to the housing 510; in the two brake mechanisms 50 disposed adjacent to each other and with the elastic members 51 facing each other, the connecting members 513 of the two elastic members 51 are attached to the support member 22 at the same attachment position. Every two elastic members 51 are mounted with the support member 22 at the same mounting position, which can save mounting time and space.

The locking member 53 is a cylinder with a central axis parallel to the central axis of the inner ring 10. In the locked state, the circumferential surface of the cylinder forms line contact with the inner ring 10, the push block 512 and the outer ring 20, so that the locking piece 53 can be stably limited. Further, referring to fig. 3, a cover 70 is provided on the side of the slewing bearing where the outer ring 40 is not provided in the axial direction, and the cover 70 is positioned on the slewing bearing and bolted to the outer ring 10. The cover 70 covers the inner ring 10 and the outer ring 20, and also has a limiting effect on the locking member 53.

In the present embodiment, the supporting member 22 is annular and coaxial with the outer ring 20, so that a plurality of receiving grooves 230 can be formed on one supporting member 22. In addition to this, it is also possible to: the number of the supporting pieces is at least two, all the supporting pieces are distributed at intervals along the circumferential direction of the outer ring, and each supporting piece is provided with at least one accommodating groove.

With combined reference to fig. 2 and 4, the inner circumferential surface of the outer ring 20 has a groove 201 extending in the circumferential direction, and the support member 22 is fixedly connected to the outer ring 20 at the position of the groove 201. The number of the grooves 201 is multiple, the grooves 201 are mutually spaced along the circumferential direction of the outer ring 20, and each groove 201 corresponds to one mounting position; alternatively, the groove 201 is of annular configuration and is coaxial with the outer ring 20. The groove 201 has an opening extending away from the outer ring 40 to an end surface of the outer ring 20 in the axial direction of the outer ring 20, and a bottom surface 211 facing away from the outer ring 40, and the support 22 is located on the bottom surface 211 and connected to the bottom surface 211. Specifically, the bottom surface of the groove 201 is bolted to the support member 22.

In another embodiment, when the outer ring is a rotating ring and the inner ring is a non-rotating ring, a support is mounted on the surface of the inner ring facing the outer ring along the radial direction, and at least two braking mechanisms are arranged on the support, wherein at least one braking mechanism is used for locking and unlocking when the outer ring rotates clockwise, and at least one braking mechanism is used for locking and unlocking when the outer ring rotates anticlockwise.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A slewing bearing comprising: the rolling bearing comprises an inner ring, an outer ring and a plurality of rolling bodies positioned between the inner ring and the outer ring;

one of the inner ring and the outer ring is a rotating ring, and the other ring is a non-rotating ring;

the bearing is characterized in that a supporting piece is fixedly arranged on the non-rotating ring at one axial end of the slewing bearing, and the supporting piece axially faces away from the surfaces of the rolling bodies, and an inner ring and an outer ring enclose a containing chamber;

at least two brake mechanisms are arranged in the accommodating chamber, the support part supports the brake mechanisms, at least one brake mechanism is used for locking and unlocking when the rotating ring rotates clockwise, and at least one brake mechanism is used for locking and unlocking when the rotating ring rotates anticlockwise.

2. The slewing bearing according to claim 1, wherein at least two receiving grooves are formed in the receiving chamber in a circumferential direction of the non-rotating ring, the receiving grooves are divided into two parts, and a radial dimension of a joint of the two parts is smallest;

a braking mechanism is disposed in each of the receiving slots, each of the braking mechanisms including: the elastic piece, the driving piece and the locking piece are positioned between the elastic piece and the driving piece, the elastic piece and the locking piece are positioned at one part of the accommodating groove, the locking piece is closer to the joint, and the driving piece is positioned at the other part of the accommodating groove;

in at least two braking mechanisms, along a circumferential direction of the non-rotating ring, the arrangement of at least one braking mechanism is as follows in sequence: elastic component, locking piece and driving piece, and arrange in at least one other arrestment mechanism in proper order: the driving piece, the locking piece and the elastic piece;

the rotating ring and the non-rotating ring are in a locking state, and the locking piece is clamped between the rotating ring and the non-rotating ring under the action of the elastic force of the elastic piece; the rotating ring and the non-rotating ring are in an unlocking state, and the locking piece is kept in the accommodating groove part where the elastic piece is located under the action of driving force of the driving piece in the opposite direction to the elastic force.

3. The slewing bearing according to claim 2, wherein the inner ring is a rotating ring and the outer ring is a non-rotating ring, and an annular ring fixedly connected with the inner ring is sleeved on the outer side of the inner ring;

the annular ring is opposite to the outer ring in the radial direction and is separated from the outer ring, and when the inner ring and the outer ring are in a locking state, the locking piece is respectively propped against the outer ring and the annular ring in the radial direction.

4. The slewing bearing according to claim 2, wherein the number of the braking mechanisms is an even number of not less than four, and the number of the braking mechanisms arranged in order in the elastic member, the lock member, and the driving member is the same as the number of the braking mechanisms arranged in order in the driving member, the lock member, and the elastic member in a circumferential direction of the non-rotating ring.

5. The slewing bearing according to claim 4, wherein in two adjacent braking mechanisms, in a circumferential direction of the non-rotating ring, the arrangement in one of the braking mechanisms is the elastic member, the locking member and the driving member in sequence, and the arrangement in the other braking mechanism is the driving member, the locking member and the elastic member in sequence.

6. The slewing bearing according to claim 5, wherein all the brake mechanisms are arranged at equal intervals in the circumferential direction of the non-rotating ring.

7. The slewing bearing according to claim 5, wherein in each of the brake mechanisms, the other end of the elastic member opposite to the locking member is provided with a connecting member, and the connecting member is connected with the elastic member;

in two adjacent braking mechanisms with the elastic parts arranged oppositely, the connecting parts of the two elastic parts are fixedly connected with the supporting part at the same mounting position.

8. The slewing bearing according to claim 2, wherein the drive member is a one-way cylinder comprising a cylinder body and a piston rod, one end of the piston rod extending into the cylinder body and the other end being disposed opposite the locking member.

9. The slewing bearing of claim 8, wherein the resilient member comprises:

the shell is provided with an opening, and the opening faces the locking piece;

a coil spring located in the housing;

and the pushing block is positioned between the spiral spring and the locking piece along the central axis direction of the spiral spring and is respectively abutted against the spiral spring and the locking piece.

10. The slewing bearing of claim 2, wherein the locking member is a cylinder having a central axis parallel to a central axis of the inner ring.

11. The slewing bearing according to claim 2, wherein the surface of the non-rotating ring facing the rotating ring in the radial direction has a groove extending in the circumferential direction;

along the axis direction of the non-rotating ring, the groove is provided with an opening which extends to the end face of the non-rotating ring from the outer ring and a bottom face which faces away from the outer ring, and the supporting piece is positioned on the bottom face of the groove and is connected with the bottom face of the groove through a bolt.

12. The slewing bearing according to claim 2, wherein in the housing groove, the surface of the non-rotating ring radially opposite to the rotating ring is: a plane; or an arc surface protruding toward the rotating ring in the radial direction; or a paraboloid which protrudes radially towards the rotating collar.

13. A slewing bearing according to any one of claims 2 to 12, wherein the support member is annular and coaxial with the non-rotating ring; or,

the number of the supporting pieces is at least two, all the supporting pieces are distributed at intervals along the circumferential direction of the non-rotating ring, each supporting piece corresponds to one accommodating chamber, and at least one accommodating groove is formed in each accommodating chamber.