Cross arm convenient to mount and dismount

Abstract

The invention relates to a cross arm convenient to mount and dismount, which relates to the technical field of power transmission line equipment and comprises a mounting assembly, a connecting assembly and a cross arm body, the mounting assembly comprises at least two fixing seats, and every two adjacent fixing seats are detachably connected; a cross arm body is arranged on one side of the fixed seat; the connecting assembly comprises a first connecting piece, a second connecting piece and a first limiting piece; the first connecting piece is fixedly connected with the fixing base, the second connecting piece is detachably connected with the cross arm body, a first mounting groove is formed in one side of the first connecting piece in the second direction, a first sliding groove is formed in the top wall of the first connecting piece in the first direction, and the first sliding groove communicates with the first mounting groove; the first limiting piece slides in the first sliding groove in the first direction, and the second connecting piece is located in the first mounting groove and slides along the groove wall of the first mounting groove. The mounting and dismounting device has the effect of improving the mounting and dismounting efficiency of the cross arm.

Description

Technical Field

[0001] The present application relates to the technical field of power transmission line equipment, and in particular to a cross arm that is easy to install and disassemble. Background Art

[0002] The crossarm is an important component of the pole tower. Its function is to install insulators and hardware to support the conductors and lightning conductors and keep them at a certain safety distance as required.

[0003] Under the relevant technology, the traditional manual installation method relies on workers to use wrenches, screwdrivers and other tools to tighten and loosen bolts. Although the operation is simple, it is inefficient, labor-intensive, and prone to safety accidents; semi-automatic installation and disassembly tools are usually equipped with electric or pneumatic drive devices to assist workers in completing part of the installation and disassembly work. Although the work efficiency is improved, manual participation is still required, and the equipment is large in size, inconvenient to carry, and has poor adaptability; the fully automated installation and disassembly robot integrates a variety of sensors and actuators, and can complete the installation and disassembly of the crossarm without human intervention. Despite the high degree of automation, the equipment is expensive, maintenance is complex, and the applicable environment is limited, making it difficult to be widely used in field operations.

[0004] Regarding the above-mentioned related technologies, the existing cross-arm installation and removal methods generally have problems such as low efficiency, high labor intensity, poor safety, complex equipment, high cost, etc. Especially for large-scale power grid construction and maintenance, traditional manual operations can no longer meet the requirements of rapid response. Summary of the invention

[0005] In order to improve the efficiency of installing and disassembling the crossarm, the present application provides a crossarm that is easy to install and disassemble.

[0006] The present application provides a cross arm that is easy to install and disassemble, using the following technical solution: A cross arm that is easy to install and disassemble, comprising a mounting assembly, a connecting assembly and a cross arm body; The mounting assembly is formed with a mounting area penetrating the mounting assembly along a first direction, the mounting assembly comprises at least two fixing seats, two adjacent fixing seats are detachably connected, and the plurality of fixing seats are distributed along the circumference of a virtual circle; A cross arm body is provided on one side of the fixing seat, and the connecting assembly is located between the fixing seat and the cross arm body; The connecting assembly includes a first connecting member, a second connecting member and a first limiting member; The first connecting member is fixedly connected to the fixing seat, and the second connecting member is detachably connected to the crossarm body. A first mounting groove is opened on one side of the first connecting member along the second direction, and a first sliding groove is opened on the top wall of the first connecting member along the first direction. The first sliding groove is communicated with the first mounting groove, one end of the first limiting member is located on the outside of the first connecting member, and the other end is located in the first mounting groove after passing through the first sliding groove. The first limiting member slides in the first sliding groove along the first direction, and the second connecting member is located in the first mounting groove and slides along the groove wall of the first mounting groove. A limiting groove for accommodating the first limiting member is opened on one side of the second connecting member close to the first sliding groove along the first direction.

[0007] By adopting the above technical scheme, by setting up the installation component and the connection component, when installing the crossarm body, a plurality of fixing seat sleeves are set on the pole or the tower for fixing. In order to facilitate personnel to install the crossarm body, the crossarm body and the second connecting member are detachably connected, the second connecting member is slid into the first installation groove, and the first limiting member is slid along the first direction toward the side away from the first installation groove to slide the first limiting member into the first sliding groove. After the second connecting member is located in the first installation groove, the first limiting member is slid again along the first direction to slide the first limiting member into the limiting groove. The second connecting member is fixed in the first installation groove by the first limiting member, so as to further realize the fixed connection between the crossarm body and the fixing seat. When disassembling the crossarm body, it is only necessary to slide the first limiting member again along the first direction to pull out the second connecting member. The installation is convenient and the fixing effect is firm.

[0008] Optionally, the connecting assembly also includes an elastic member, the first limiting member having a first connecting portion and a first limiting portion that are integrally connected, the outer diameter of the first limiting portion being larger than the outer diameter of the first connecting portion, the first slide groove comprising a first sliding section and a second sliding section that are connected, the first sliding section being located above the second sliding section, the inner diameter of the second sliding section being larger than the inner diameter of the first sliding section, the elastic member being located in the second sliding section and sleeved on the first connecting portion, one end of the elastic member abutting against the top wall of the second sliding section, and the other end abutting against the end wall of the first limiting portion close to the first connecting portion, and the elastic member having a force to drive the first limiting member to move toward the side close to the first slide groove under recoverable deformation.

[0009] By adopting the above technical solution and setting an elastic member, when one end of the first limiting part is located in the first installation groove, the elastic member is in normal state, and when the first limiting part slides from the first installation groove to the first sliding section along the first direction, the elastic member is compressed, and personnel only need to push the second connecting member into the first installation groove. Under the action of the elastic member, the second connecting member contacts the first limiting part and pushes the first limiting part into the second sliding section. After the first limiting part loses the driving force, the first limiting part further slides into the limiting groove to make the installation method simpler.

[0010] Optionally, one end of the first connecting portion away from the first limiting portion is fixedly connected to a second limiting member, and one side of the second limiting member abuts against a top wall of the first connecting member.

[0011] By adopting the above technical solution, in order to limit the sliding of the first connecting part, when the elastic member is in a normal state, one side of the second limiting member abuts against the top wall of the first connecting member.

[0012] Optionally, the first limiting portion is inclined near a side of the cross arm body, and one side of the first limiting portion is inclined from the first connecting member toward the second connecting member along a direction close to the first mounting groove, and a side of the second connecting member away from the mounting member is arc-shaped.

[0013] By adopting the above technical solution, in order to make the second connecting member contact with the first limiting portion more smoothly in the first installation groove, and push the first limiting portion into the second sliding section, the arc-shaped second connecting member contacts the first limiting portion and pushes the first limiting portion into the second sliding section.

[0014] Optionally, the outer circumferential wall of the first limiting portion is completely in contact with the inner circumferential wall of the limiting groove.

[0015] By adopting the above technical solution, in order to reduce the shaking of the second connecting member in the first installation groove, when the first limiting portion is located in the limiting groove, the second connecting member is in a fixed state in the first installation groove, thereby further ensuring the stability of the connection between the fixing seat and the crossarm body.

[0016] Optionally, it also includes a clamping component, which is distributed along the circumference of the virtual circle. The clamping component includes a roller and a mounting frame. A second sliding groove is opened on the side of the fixed seat close to the mounting area along a direction perpendicular to the central axis of the virtual circle. The mounting frame is located in the second sliding groove, and the mounting frame is slidably connected to the fixed seat along a direction perpendicular to the central axis of the virtual circle. The roller is rotatably connected to the mounting frame, and the roller is parallel to the tangent of the virtual circle along the rotation axis of the mounting frame.

[0017] By adopting the above technical solution, in order to further enable the fixing seat to be stably installed on the pole or tower, a tightening component is set, and the mounting frame slides along the direction perpendicular to the central axis of the virtual circle, so that the roller slides in the second slide groove, so that the roller further contacts the pole, so as to improve the stability of the connection between the fixing seat and the pole, and the roller slides along the direction perpendicular to the central axis of the virtual circle, so that the roller can clamp and fix poles of different thicknesses, and by setting the roller, when the fixing seat is installed on a non-cylindrical structure, the roller can also be fixed.

[0018] Optionally, it also includes a driving component, which includes a screw and a fixed rod. The fixed seat is provided with a third slide groove along a direction perpendicular to the tangent of the virtual circle, the third slide groove is connected to the second slide groove, the screw is arranged perpendicular to the tangent of the virtual circle, the screw is arranged at a top of the fixed seat, the screw is rotatably connected to the fixed seat, the screw is perpendicular to the tangent direction of the virtual circle along the rotation axis of the fixed seat, one end of the fixed rod is sleeved on the screw and slides along the length of the screw rod, and the other end passes through the third slide groove and is fixedly connected to the mounting frame.

[0019] By adopting the above technical solution, in order to drive the mounting frame to slide in a direction perpendicular to the central axis of the virtual circle, a driving component is set to drive the mounting frame to slide in the second slide groove by rotating the screw rod, drive the roller to slide out of the second slide groove, and the roller contacts and presses against the electric pole.

[0020] Optionally, a handle is fixedly connected to one end of the screw rod.

[0021] By adopting the above technical solution and providing a handle, a person can hold the handle and rotate the screw rod, which makes operation more convenient for the person.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application sets an installation component and a connection component, slides the first limiter along the first direction toward the side away from the first installation groove to slide the first limiter into the first slide groove, and after the second connection member is located in the first installation groove, slides the first limiter again along the first direction to slide the first limiter into the limiter groove, and fixes the second connection member in the first installation groove by the first limiter, so as to further realize the fixed connection between the cross arm body and the fixing seat. When disassembling the cross arm body, only the first limiter needs to be slid again along the first direction to pull out the second connection member, which is convenient for installation and has a firm fixing effect. 2. In the present application, by providing an elastic member, a person only needs to push the second connecting member into the first installation groove. Under the action of the elastic member, the second connecting member contacts the first limiting portion and pushes the first limiting portion into the second sliding section. After the first limiting portion loses its driving force, the first limiting portion further slides into the limiting groove, so that the installation or disassembly method is simpler; 3. The present application provides a tightening assembly so that the fixing seat and the pole can be tightened by the sliding of the roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the installation components, connection components and crossarm body of the present application; Figure 2 It is a schematic diagram of the structure of the connection components of this application; Figure 3 is a front view of the connection assembly of the present application; Figure 4 It is a structural schematic diagram of the tightening component of the present application; Figure 5 It is a schematic diagram of the structure of the driving component of this application; Explanation of the accompanying drawings: 1. Installation component; 11. Fixed seat; 111. Second slide groove; 112. Third slide groove; 12. Installation area; 2. Connection component; 21. First connection member; 211. First installation groove; 212. First slide groove; 2121. First sliding section; 2122. Second sliding section; 22. Second connection member; 221. Limiting groove; 222. Installation member; 23. First limiting member; 231. First connection part; 2311. Second limiting member; 232. First limiting part; 24. Elastic member; 3. Cross arm body; 4. Tightening component; 41. Roller; 42. Mounting frame; 5. Driving component; 51. Screw; 511. Mounting seat; 512. Handle; 52. Fixed rod. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-5 This application is described in further detail.

[0025] The embodiment of the present application discloses a cross arm that is easy to install and disassemble. Figure 1 The crossarm that is easy to install and disassemble includes an installation component 1, a connecting component 2 and a crossarm body 3. The installation component 1 is used to be fixed on a tower or a pole, and the connecting component 2 is arranged between the installation component 1 and the crossarm body 3 to connect the installation component 1 and the crossarm body 3.

[0026] Reference Figure 1The mounting assembly 1 includes at least two fixing seats 11. Two adjacent fixing seats 11 are spliced ​​together to form a mounting area 12 for clamping the pole. The mounting area 12 penetrates the fixing seat 11 along the first direction. In this embodiment, there are two fixing seats 11. Each fixing seat 11 is semicircular. Two semicircular hanging seats are spliced ​​into a circular structure. For ease of installation, one side of the two fixing seats 11 is hinged and the other side is fixed by bolts.

[0027] Reference Figure 1 and Figure 2 , the virtual circle is located in the installation area 12, the central axis of the virtual circle is parallel to the first direction, a cross arm body 3 is provided on one side of each fixing seat 11, the connecting assembly 2 is provided between the fixing seat 11 and the cross arm body 3, the connecting assembly 2 includes a first connecting member 21, a second connecting member 22 and a first limiting member 23, the first connecting member 21 is fixedly connected to the fixing seat 11, in order to facilitate the installation of the cross arm body 3, the second connecting member 22 is detachably connected to the cross arm body 3, a first installation groove 211 is provided on one side of the first connecting member 21 along the second direction, a first slide groove 212 is provided on the top wall of the first connecting member 21 along the first direction, and the first slide groove 212 is communicated with the first installation groove 211; Reference Figure 1 A first stopper 23 is provided in the first slide groove 212, one end of the first stopper 23 is located outside the first connecting member 21, and the other end passes through the first slide groove 212 and is located in the first installation groove 211. The first stopper 23 is slidably connected to the first connecting member 21 in the first slide groove 212 along the first direction, and the second connecting member 22 is located in the first installation groove 211 and slides along the groove wall of the first installation groove 211. A stopper groove 221 for accommodating the first stopper 23 is opened along the first direction on one side of the second connecting member 22 close to the first slide groove 212; When it is necessary to connect the crossarm body 3 with the fixing seat 11, slide the first limiting member 23 along the first direction so that the first limiting member 23 slides out of the first mounting groove 211, then push the second connecting member 22 into the first mounting groove 211, and then slide the first limiting member 23 along the first direction into the first mounting groove 211 so that the first limiting member 23 is located in the limiting groove 221 of the second connecting member 22, thereby realizing the connection and fixation between the first limiting member 23 and the second connecting member 22, and further realizing the fixed connection between the fixing seat 11 and the crossarm body 3.

[0028] Reference Figure 2 In order to connect the second connecting member 22 to the crossarm body 3, a mounting member 222 is fixedly connected to one side of the second connecting member 22 close to the crossarm body 3, and the mounting member 222 is connected to the crossarm body 3 by bolts; before personnel climb up to the tower or pole working position, personnel on the ground can first fix the mounting member 222 to the crossarm body 3.

[0029] Reference Figure 2 and Figure 3 In order to enable the first limiting member 23 to be reset, the connecting assembly 2 also includes an elastic member 24. The first limiting member 23 has a first connecting portion 231 and a first limiting portion 232 that are integrally connected. The outer diameter of the first limiting portion 232 is greater than the outer diameter of the first connecting portion 231. The first sliding groove 212 includes a first sliding section 2121 and a second sliding section 2122 that are connected. The first sliding section 2121 is located above the second sliding section 2122. The inner diameter of the second sliding section 2122 is greater than the inner diameter of the first sliding section 2121. The outer peripheral wall of the first connecting portion 231 is in contact with the inner peripheral wall of the first sliding section 2121. The outer peripheral wall of the first limiting portion 232 is in contact with the inner peripheral wall of the second sliding section 2122. The elastic member 24 is located in the second sliding section 2122 and is sleeved on the first connecting portion 231. One end of the elastic member 24 abuts against the top wall of the second sliding section 2122, and the other end abuts against an end wall of the first limiting portion 232 close to the first connecting portion 231. The elastic member 24 has a force to drive the first limiting portion 23 to move toward the side close to the first sliding groove 212 under recoverable deformation. In this embodiment, the elastic member 24 is a compression spring; when one end of the first limiting portion 232 is located in the first mounting groove 211, the elastic member 24 is in normal state. When the first limiting portion 232 slides from the first mounting groove 211 to the first sliding section 2121 along the first direction, the elastic member 24 is compressed.

[0030] Reference Figure 3 In order to limit the sliding of the first connection part 231, the end of the first connection part 231 away from the first limiting part 232 is fixedly connected with the second limiting member 2311, and one side of the second limiting member 2311 abuts against the top wall of the first connection member 21. When the elastic member 24 is in normal state, one side of the second limiting member 2311 abuts against the top wall of the first connection member 21.

[0031] Reference Figure 3 In order to make the second connecting member 22 contact with the first limiting portion 232 more smoothly in the first mounting groove 211 and push the first limiting portion 232 into the second sliding section 2122, the first limiting portion 232 is tilted near the side of the cross arm body 3, and one side of the first limiting portion 232 is tilted from the first connecting member 21 toward the second connecting member 22 along the direction close to the first mounting groove 211, and the side of the second connecting member 22 away from the mounting member 222 is in an arc shape, so that the arc-shaped second connecting member 22 contacts the first limiting portion 232 and pushes the first limiting portion 232 into the second sliding section 2122. After the first limiting portion 232 loses its thrust, under the action of the elastic member 24, the first limiting portion 232 slides in the first mounting groove 211, and the first limiting portion 232 is located in the limiting groove 221.

[0032] Reference Figure 3In order to reduce the shaking of the second connecting member 22 in the first installation groove 211, the outer wall of the first limiting portion 232 is completely fitted with the inner wall of the limiting groove 221; when the first limiting portion 232 is located in the limiting groove 221, the second connecting member 22 is in a fixed state in the first installation groove 211, thereby further ensuring the stability of the connection between the fixing seat 11 and the cross arm body 3.

[0033] Reference Figure 4 In order to further enable the fixing seat 11 to be stably installed on the pole or tower, the cross arm for easy installation and disassembly also includes a tightening component 4, and the tightening component 4 is distributed along the circumference of the virtual circle. In this embodiment, the tightening component 4 is provided with two, and the tightening component includes a roller 41 and a mounting bracket 42. A second slide groove 111 is opened on one side of the fixing seat 11 close to the installation area 12 along a direction perpendicular to the central axis of the virtual circle. The mounting bracket 42 is located in the second slide groove 111, and the mounting bracket 42 is slidably connected along a direction perpendicular to the central axis of the virtual circle. On the fixed seat 11, the roller 41 is rotatably connected to the mounting frame 42, and the roller 41 is parallel to the tangent of the virtual circle along the rotation axis of the mounting frame 42; if the thickness of the pole is different, the mounting frame 42 slides in a direction perpendicular to the central axis of the virtual circle, so that the roller 41 slides in the second slide groove 111, so that the roller 41 further contacts the pole, so as to improve the stability of the connection between the fixed seat 11 and the pole; and by setting the roller 41, when the fixed seat 11 is installed with a non-cylindrical structure, the roller 41 can also be fixed.

[0034] Reference Figure 5 In order to drive the mounting frame 42 to slide along the direction perpendicular to the central axis of the virtual circle, the cross arm for easy installation and disassembly also includes a driving assembly 5, the driving assembly 5 includes a screw 51 and a fixing rod 52, the fixing seat 11 is provided with a third slide groove 112 along the direction perpendicular to the tangent of the virtual circle, the third slide groove 112 is connected with the second slide groove 111, the screw 51 is arranged perpendicular to the tangent direction of the virtual circle, the screw 51 is arranged at the top of the fixing seat 11, the screw 51 is connected to the fixing seat 11 through the mounting seat 511, and the mounting seat 5 11 is fixedly connected to the fixing seat 11, the screw rod 51 is rotatably connected to the mounting seat 511, the screw rod 51 is perpendicular to the tangent direction of the virtual circle along the rotation axis of the mounting seat 511, one end of the fixing rod 52 is sleeved on the screw rod 51 and slides along the length direction of the screw rod 51, and the other end passes through the third slide groove 112 and is fixedly connected to the mounting frame 42; the screw rod 51 is rotated to drive the mounting frame 42 to slide in the second slide groove 111, and the roller 41 is driven to slide out of the second slide groove 111, and the roller 41 contacts and presses against the electric pole.

[0035] Reference Figure 5 In order to facilitate operation by personnel, a handle 512 is fixedly connected to one end of the screw rod 51 to facilitate personnel to hold and rotate the screw rod 51.

[0036] The implementation principle of the cross arm that is easy to install and disassemble in the embodiment of the present application is as follows: when a person climbs to the working position, the two fixing seats 11 are installed on the pole or iron frame by bolts, and the handle 512 is turned to drive the screw 51 to drive the roller 41 to slide out of the second slide groove 111, and the roller 41 is pressed against the pole; The second connecting member 22 is inserted into the first mounting groove 211, and the arc-shaped second connecting member 22 contacts the first limiting portion 232, and the first limiting portion 232 is pushed into the second sliding section 2122. When the first limiting portion 232 loses its driving force, under the action of the elastic member 24, the second sliding section 2122 slides out of the second limiting portion along the first direction, and further presses against the groove wall of the limiting groove 221, thereby fixing the first connecting member 21 and the second connecting member 22, thereby fixing the cross arm body 3 and the fixing seat 11.

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cross arm that is easy to install and disassemble, characterized in that: It comprises a mounting assembly (1), a connecting assembly (2) and a cross arm body (3); The mounting assembly (1) is provided with a mounting area (12) which penetrates the mounting assembly (1) along a first direction, the mounting assembly (1) comprises at least two fixing seats (11), two adjacent fixing seats (11) are detachably connected, and the plurality of fixing seats (11) are distributed along the circumference of a virtual circle; A cross arm body (3) is provided on one side of the fixing seat (11), and the connecting component (2) is located between the fixing seat (11) and the cross arm body (3); The connecting assembly (2) comprises a first connecting member (21), a second connecting member (22) and a first limiting member (23); The first connecting member (21) is fixedly connected to the fixing seat (11), and the second connecting member (22) is detachably connected to the cross arm body (3). A first mounting groove (211) is provided on one side of the first connecting member (21) along the second direction. A first sliding groove (212) is provided on the top wall of the first connecting member (21) along the first direction. The first sliding groove (212) is communicated with the first mounting groove (211). One end of the first limiting member (23) is located outside the first connecting member (21), and the other end passes through the first sliding groove (212) and is located in the first mounting groove (211). The first limiting member (23) slides in the first sliding groove (212) along the first direction. The second connecting member (22) is located in the first mounting groove (211) and slides along the groove wall of the first mounting groove (211). A limiting groove (221) for accommodating the first limiting member (23) is provided on one side of the second connecting member (22) close to the first sliding groove (212) along the first direction.

2. A cross arm that is easy to install and disassemble according to claim 1, characterized in that: A mounting member (222) is fixedly connected to one side of the second connecting member (22) close to the cross arm body (3), and the mounting member (222) is connected to the cross arm body (3) by bolts.

3. A cross arm that is easy to install and disassemble according to claim 2, characterized in that: The connecting assembly (2) further comprises an elastic member (24); the first limiting member (23) comprises a first connecting portion (231) and a first limiting portion (232) which are integrally connected; the outer diameter of the first limiting portion (232) is larger than the outer diameter of the first connecting portion (231); the first sliding groove (212) comprises a first sliding section (2121) and a second sliding section (2122) which are connected; the first sliding section (2121) is located above the second sliding section (2122); the inner diameter of the second sliding section (2122) is larger than the outer diameter of the first connecting portion (231); At the inner diameter of the first sliding section (2121), the elastic member (24) is located inside the second sliding section (2122) and is sleeved on the first connecting portion (231); one end of the elastic member (24) abuts against the top wall of the second sliding section (2122), and the other end abuts against the end wall of the first limiting portion (232) close to the first connecting portion (231); the elastic member (24) has a force to drive the first limiting member (23) to move toward the side close to the first sliding groove (212) under a recoverable deformation.

4. A cross arm that is easy to install and disassemble according to claim 3, characterized in that: One end of the first connecting portion (231) away from the first limiting portion (232) is fixedly connected to a second limiting member (2311), and one side of the second limiting member (2311) is in contact with the top wall of the first connecting portion (21).

5. The cross arm that is easy to install and disassemble according to claim 3, characterized in that: The first limiting portion (232) is arranged obliquely on a side close to the cross arm body (3); one side of the first limiting portion (232) is arranged obliquely from the first connecting member (21) toward the second connecting member (22) along a direction close to the first mounting groove (211); and a side of the second connecting member (22) away from the mounting member (222) is in an arc shape.

6. A cross arm that is easy to install and disassemble according to claim 3, characterized in that: The outer peripheral wall of the first limiting portion (232) is completely fitted with the inner peripheral wall of the limiting groove (221).

7. The cross arm that is easy to install and disassemble according to claim 1, characterized in that: The invention also comprises a clamping assembly (4), wherein the clamping assembly (4) is distributed along the circumference of the virtual circle, the clamping assembly (4) comprises a roller (41) and a mounting frame (42), a second slide groove (111) is provided on a side of the fixed seat (11) close to the mounting area (12) along a direction perpendicular to the central axis of the virtual circle, the mounting frame (42) is located in the second slide groove (111), and the mounting frame (42) is slidably connected to the fixed seat (11) along a direction perpendicular to the central axis of the virtual circle, the roller (41) is rotatably connected to the mounting frame (42), and the roller (41) is parallel to the tangent of the virtual circle along the rotation axis of the mounting frame (42).

8. A cross arm that is easy to install and disassemble according to claim 7, characterized in that: The invention also comprises a driving assembly (5), wherein the driving assembly (5) comprises a screw rod (51) and a fixing rod (52); the fixing seat (11) is provided with a third slide groove (112) along a direction perpendicular to the tangent of the virtual circle; the third slide groove (112) is communicated with the second slide groove (111); the screw rod (51) is arranged perpendicular to the tangent of the virtual circle; the screw rod (51) is arranged at the top of the fixing seat (11); the screw rod (51) is rotatably connected to the fixing seat (11); the screw rod (51) is perpendicular to the tangent of the virtual circle along the rotation axis of the fixing seat (11); one end of the fixing rod (52) is sleeved on the screw rod (51) and slides along the length direction of the screw rod (51); the other end passes through the third slide groove (112) and is fixedly connected to the mounting frame (42).

9. A cross arm that is easy to install and disassemble according to claim 8, characterized in that: One end of the screw rod (51) is fixedly connected to a handle (512).

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