Cross arm with adjustable length

Abstract

The utility model discloses a length-adjustable cross arm, and particularly relates to the technical field of power transmission fixing equipment, the length-adjustable cross arm comprises two telescopic cross arm main bodies, the top ends of the opposite sides of the two telescopic cross arm main bodies are jointly and fixedly connected with a turnover folding assembly, and the middle parts of the rear ends of the two telescopic cross arm main bodies are jointly provided with a rotary fixing assembly. The opposite sides of the two telescopic cross arm bodies can be completely overlapped by turning over the folding assemblies. According to the cross arm with the adjustable length, the positions of the movable fixing assembly and the cross arm extension beam in the cross arm main beam can be fixed, the telescopic position can be changed more conveniently through the movable fixing block, and the rapidness of the device is improved; and the cross arm main beam can be overturned and folded through rotation of the overturning opening and closing shafts and the overturning opening and closing hinges, the directional length of the cross arm is further stored, and meanwhile, the opening and closing springs and the movable opening and closing hinges can conduct buffering and damping on the cross arm main beam in the unfolding and storing process through stretching and sliding.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission fixing equipment, in particular to a cross arm with adjustable length. Background Technique

[0002] A cross arm is an angle iron horizontally fixed at the top of an electric pole. It is an important component in the pole tower. Its main function is to install insulators and fittings to support overhead wires, lightning protection wires, etc., and ensure that they maintain a certain safe distance according to regulations.

[0003] Chinese patent document CN214498575U discloses an insulating cross arm with adjustable length, including a fixed rod body. One end of the fixed rod body is an open structure. The fixed rod body is slidably connected to a movable rod body. A fixed groove is provided at the top of the fixed rod body, and a movable groove is provided at the top of the movable rod body. A plurality of fixed screw holes and movable screw holes are provided on the fixed groove and the movable groove. The fixed screw holes and the movable screw holes are respectively threadedly connected to angle irons, and porcelain insulators are provided on the angle irons.

[0004] Although the device in the above document can freely change the length of the rod body, due to the poor fixing performance of the device for fixing after telescoping, the extended part will retract in different situations. And although the above device can be contracted to reduce the transportation volume, the main body part cannot change its shape, which will cause inconvenience in carrying the device in different situations. Content of the Utility Model

[0005] The purpose of the utility model is to provide a cross arm with adjustable length to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A cross arm with adjustable length, including two telescopic cross arm bodies. A flipping and folding assembly is fixedly connected to the common top of the opposite sides of the two telescopic cross arm bodies. A rotating and fixing assembly is commonly arranged in the middle of the rear ends of the two telescopic cross arm bodies. The two telescopic cross arm bodies can make the opposite sides completely coincide through the flipping and folding assembly.

[0007] Preferably, the flipping and folding assembly includes a flipping opening and closing shaft. Flipping opening and closing pages are fixedly connected to both the left and right sides of the flipping opening and closing shaft. The bottom ends of the two flipping opening and closing pages are respectively slidably connected to the tops of the two telescopic cross arm bodies.

[0008] Preferably, the flipping opening / closing page includes an opening / closing base, one end of the opening / closing base is rotatably connected to the flipping opening / closing shaft, several opening / closing springs are fixedly connected to the end of the opening / closing base away from the flipping opening / closing shaft, one end of the opening / closing spring away from the opening / closing base is fixedly connected to a movable opening / closing page, several fixing pins are fixedly connected to the top end of the movable opening / closing page, and the fixing pins penetrate through the movable opening / closing page up and down and are slidably connected to the top end of the telescopic crossbar main body.

[0009] Preferably, the rotating fixing component includes a fixing pin slot, the fixing pin slot is opened in the middle of the common rear side of the two telescopic crossbar main bodies, the fixing pin slot is inverted T-shaped, a fixing pin is slidably and rotatably connected inside the fixing pin slot, a fixing retaining ring is arranged at the rear side right of the protruding part of the fixing pin slot, the front end of the fixing retaining ring is fixedly connected to the rear side right end of the left telescopic crossbar main body, the fixing pin is L-shaped and can completely move into the fixing pin slot of the left telescopic crossbar main body part.

[0010] Preferably, the telescopic crossbar main body includes a crossbar main beam, a moving slot is opened inside the crossbar main beam, several fixing edges are evenly and fixedly connected to the front and rear sides inside the moving slot, a moving fixing component is slidably connected inside the moving slot, the bottom end of the moving fixing component is fixedly connected to a crossbar extension beam, and one end of the crossbar main beam near the flipping opening / closing shaft at the top end is slidably connected to the bottom end of the same-side flipping opening / closing page.

[0011] Preferably, the moving fixing component includes a moving support column, the moving support column penetrates through the crossbar extension beam and is fixedly connected to the end of the crossbar extension beam close to the crossbar main beam, the top end of the moving support column is slidably connected to the inner top end of the crossbar main beam, several left-right parallel fixing springs are fixedly connected to the lower parts of the front and rear sides of the moving support column, one end of the same-side fixing spring away from the moving support column is fixedly connected to a moving fixing block, the moving fixing block is C-shaped and the bottom end extends to the outside of the bottom end of the crossbar main beam, a moving synchronization ring is slidably connected to the concave parts of the two moving fixing blocks, the inner side of the moving synchronization ring is fixedly connected to the left and right sides of the moving support column, and the left and right sides of the moving fixing block slide on the left and right ends of the inner side of the moving synchronization ring respectively.

[0012] Preferably, the length of the crossbar extension beam is the same as that of the crossbar main beam, and the width of the moving fixing block is equal to the distance between two adjacent fixing edges.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] 1. The utility model can extend the length of the cross-arm main beam through the cooperation of the cross-arm main beam and the cross-arm extension beam. At the same time, in cooperation with the movable fixing component, the cross-arm extension beam and the movable groove, the telescopic length of the cross-arm extension beam can be controllably adjusted and the telescopic state can be fixed. Moreover, the movable fixing block and the fixing spring can continuously cooperate with the fixing edge for limiting, so as to fix the position of the movable fixing component and the cross-arm extension beam inside the cross-arm main beam, enabling the cross-arm to contract while improving the stability of the telescopic state. The telescopic position can be changed more conveniently through the movable fixing block, enhancing the speed of the device.

[0015] 2. The utility model can cooperate with the cross-arm main beam through the flipping and folding component to fold and store the telescopic cross-arm main body. The cross-arm main beam can be flipped and folded by the rotation of the flipping opening and closing shaft and the flipping opening and closing page, further accommodating the directional length of the cross-arm to adapt to more transportation conditions. And the flipping and folding component can cooperate with the rotation fixing component to fix the cross-arm main beam to maintain the unfolded state when the cross-arm main beam is flipped and unfolded. At the same time, the opening and closing spring and the movable opening and closing page can buffer and shock-absorb the cross-arm main beam during the unfolding and storing processes through stretching and sliding, ensuring that other components installed on the cross-arm will not have parts falling off due to the movement of the telescopic cross-arm main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the utility model,

[0017] Figure 2 is a schematic structural diagram of the rotation fixing component of the utility model,

[0018] Figure 3 is the utility model Figure 2 schematic diagram of the structure at A in

[0019] Figure 4 is a schematic structural diagram of the telescopic cross-arm main body of the utility model,

[0020] Figure 5 is a schematic structural diagram of the movable fixing component of the utility model,

[0021] Figure 6 is a schematic structural diagram of the storage state of the utility model.

[0022] In the figure: 1. Telescopic cross-arm main body; 11. Cross-arm main beam; 12. Movable fixing component; 121. Movable support column; 122. Fixing spring; 123. Movable synchronous ring; 124. Movable fixing block; 13. Cross-arm extension beam; 2. Rotation fixing component; 21. Fixed pin slot; 22. Fixed retaining ring; 23. Fixed pin; 3. Flipping and folding component; 31. Flipping opening and closing shaft; 32. Flipping opening and closing page; 321. Opening and closing base; 322. Opening and closing spring; 323. Movable opening and closing page; 324. Fixed nail. Detailed implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0024] Please refer to Figure 1 , the present invention provides a technical solution for a cross arm with adjustable length: a cross arm with adjustable length includes two telescopic cross arm bodies 1. A flipping and folding assembly 3 is fixedly connected to the tops of the opposite sides of the two telescopic cross arm bodies 1. The two telescopic cross arm bodies 1 can be flipped and folded through the flipping and folding assembly 3 for storage. A rotating and fixing assembly 2 is jointly arranged in the middle of the rear ends of the two telescopic cross arm bodies 1. The rotating and fixing assembly 2 can fix the state of the two telescopic cross arm bodies 1 that are flipped and unfolded. The two telescopic cross arm bodies 1 can make their opposite sides completely coincide through the flipping and folding assembly 3.

[0025] Please refer to Figure 2 , the flipping and folding assembly 3 includes a flipping opening and closing shaft 31. Flipping opening and closing pages 32 are fixedly connected to both the left and right sides of the flipping opening and closing shaft 31. The bottoms of the two flipping opening and closing pages 32 are respectively slidably connected to the tops of the two telescopic cross arm bodies 1, and can be flipped with the flipping opening and closing shaft 31 as the flipping center between the telescopic cross arm bodies 1. The flipping opening and closing pages 32 can buffer the flipping process through their own components when the telescopic cross arm bodies 1 are flipped, ensuring that other components on the cross arm will not malfunction.

[0026] Please refer to Figure 2 , the rotating and fixing assembly 2 includes a fixed pin slot 21. The fixed pin slot 21 is opened in the middle of the common rear side of the two telescopic cross arm bodies 1. The fixed pin slot 21 is in an inverted T shape. A fixed pin 23 is slidably and rotatably connected inside the fixed pin slot 21. A fixed retaining ring 22 is arranged at the rear side right of the protruding part of the fixed pin slot 21. The front end of the fixed retaining ring 22 is fixedly connected to the right end of the rear side of the left telescopic cross arm body 1. The fixed pin 23 is in an L shape and can completely move into the fixed pin slot 21 of the left telescopic cross arm body 1 part.

[0027] After the telescopic cross arm body 1 is flipped, the fixing pin 23 can be moved to enter the fixing pin groove 21 of the right telescopic cross arm body 1. At the same time, a shorter section of the fixing pin 23 is rotated into the groove above the fixing pin groove 21 to prevent the fixing pin 23 from falling off together with the fixing stop ring 22. After the fixing pin 23 enters through the connection of the fixing pin groove 21, it can block the flipping action of the telescopic cross arm body 1 when the telescopic cross arm body 1 is flipped, thereby achieving fixation in the unfolded state.

[0028] See also Figure 3 The flip opening and closing page 32 includes an opening and closing base 321, one end of the opening and closing base 321 is rotatably connected to the flip opening and closing shaft 31, and the end of the opening and closing base 321 away from the flip opening and closing shaft 31 is fixedly connected to a plurality of opening and closing springs 322, and the end of the opening and closing spring 322 away from the closing base 321 is fixedly connected to a movable opening and closing page 323, and the top of the movable opening and closing page 323 is fixedly connected to a plurality of fixing nails 324, and the fixing nails 324 penetrate the movable opening and closing page 323 up and down and are slidably connected to the top of the telescopic cross arm body 1.

[0029] The rotation of the opening and closing spring 322 can be supported by the opening and closing base 321, and the opening and closing spring 322 can maintain connection with the movable opening and closing page 323, so as to buffer and reset the state of the movable opening and closing page 323 at all times. The movable opening and closing page 323 is slidably connected to the cross arm main beam 11 through the fixing nail 324. When the cross arm main beam 11 rotates and unfolds, the movable opening and closing page 323 will convert the rotational force generated by the rotation into a unidirectional lateral force through the opening and closing spring 322 buffering. The pulling force of the opening and closing spring 322 on the movable opening and closing page 323 during flipping causes the movable opening and closing page 323 to slide on the top of the cross arm main beam 11, and the opening and closing spring 322 will reset the movable opening and closing page 323 after the flipping is completed, so as to perform shock absorption and buffering. At the same time, the telescopic rod inside the opening and closing spring 322 can ensure the deformation direction of the opening and closing spring 322 according to the movement and extension of the movable opening and closing page 323.

[0030] See also Figure 4 The telescopic crossarm body 1 includes a crossarm main beam 11, a movable groove is opened inside the crossarm main beam 11, a plurality of fixed edges are evenly fixedly connected on the front and rear sides of the movable groove, a movable fixed component 12 is slidably connected in the movable groove, a crossarm extension beam 13 is fixedly connected to the bottom end of the movable fixed component 12, and the end of the top of the crossarm main beam 11 close to the flip opening and closing axis 31 is slidably connected to the bottom end of the flip opening and closing page 32 on the same side.

[0031] By cooperating the movable fixing assembly 12 with the movable groove and the fixed edge inside the crossarm main beam 11, the crossarm extension beam 13 at the bottom end of the movable fixing assembly 12 can slide and be fixed inside the crossarm main beam 11 to achieve the effect of retracting the crossarm.

[0032] See also Figure 5, the moving and fixing component 12 includes a moving support column 121. The moving support column 121 penetrates through the cross arm extension beam 13 and is fixedly connected to one end of the cross arm extension beam 13 close to the cross arm main beam 11. The top end of the moving support column 121 is slidably connected to the inner top end of the cross arm main beam 11. A number of left - right parallel fixing springs 122 are fixedly connected to the lower parts on the front and rear sides of the moving support column 121. One end of the fixing spring 122 on the same side away from the moving support column 121 is fixedly connected to a moving fixing block 124. The moving fixing block 124 is C - shaped and its bottom end extends to the outside of the bottom end of the cross arm main beam 11. A moving synchronous ring 123 is slidably connected to the concave parts of the two moving fixing blocks 124. The inner side of the moving synchronous ring 123 is fixedly connected to the left and right sides of the moving support column 121. The left and right sides of the moving fixing block 124 slide on the left and right ends of the inner side of the moving synchronous ring 123 respectively.

[0033] Please refer to Figure 4 and Figure 5 , the length of the cross arm extension beam 13 is the same as that of the cross arm main beam 11, and the width of the moving fixing block 124 is equal to the distance between adjacent fixing edges.

[0034] The moving support column 121 provides support for the whole component and provides a fulcrum for sliding inside the cross arm main beam 11, enabling the cross arm extension beam 13 to expand and contract through the movement of the moving support column 121. The moving fixing block 124 can fix the position of the cross arm extension beam 13 by closely attaching its own width to the fixing edge. The fixing spring 122 can support the moving fixing block 124 through its own characteristics, enabling the moving fixing block 124 to enter the space between the fixing edges for close fixing. The moving fixing block 124 can slide under the restriction of the moving synchronous ring 123, ensuring that the concave part of the moving fixing block 124 closely slides along the bottom end of the cross arm main beam 11. By pressing the bottoms of the moving fixing blocks 124 on both sides, the fixing spring 122 can be contracted, disengaging the top of the moving fixing block 124 from between the fixing edges to release the fixation and slide the moving and fixing component 12 for expansion and contraction.

[0035] Working principle:

[0036] First, turn the telescopic cross arm body 1 when the device is in the folded state. During the turning process, the turning opening and closing shaft 31 serves as the support and the turning opening and closing page 32 serves as the shock absorber to ensure the smoothness and stability of the device turning. After the turning is completed, rotate and slide the fixed pin 23 to fix the fixed pin 23 between the two telescopic cross arm bodies 1 to fix the unfolded state of the telescopic cross arm body 1. Then, press the two movable fixing blocks 124 outward from the outer side of the bottom end of the cross arm main beam 11 towards the movable support column 121 to make the top part of the movable fixing block 124 leave between the two fixed edges to release the fixation. Then, slide the movable fixing assembly 12 to drive the cross arm extension beam 13 to perform telescopic adjustment. After adjusting to the required length, release the hand, and the movable fixing block 124 will pop out under the support of the fixing spring 122 and re-enter between the corresponding fixed edges for fixation. Just perform the reverse operation synchronously when releasing the storage.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cross arm with adjustable length, comprising two telescopic cross arm bodies (1), characterized in that: The top ends of the opposite sides of the two telescopic cross arm bodies (1) are commonly fixedly connected with a flipping and folding assembly (3), and the middle parts of the rear ends of the two telescopic cross arm bodies (1) are commonly provided with a rotating fixing assembly (2). The two telescopic cross arm bodies (1) can completely overlap their opposite sides by flipping and folding the assembly (3).

2. The cross arm with adjustable length according to claim 1, characterized in that: The flip folding assembly (3) comprises a flip opening and closing shaft (31), and the left and right sides of the flip opening and closing shaft (31) are fixedly connected with flip opening and closing pages (32), and the bottom ends of the two flip opening and closing pages (32) are respectively slidably connected to the top ends of the two telescopic cross arm bodies (1).

3. The cross arm with adjustable length according to claim 2, characterized in that: The flip opening and closing leaf (32) comprises an opening and closing base (321), one end of the opening and closing base (321) is rotatably connected to the flip opening and closing shaft (31), one end of the opening and closing base (321) away from the flip opening and closing shaft (31) is fixedly connected to a plurality of opening and closing springs (322), one end of the opening and closing spring (322) away from the closing base (321) is fixedly connected to a movable opening and closing leaf (323), and the top of the movable opening and closing leaf (323) is fixedly connected to a plurality of fixing nails (324), and the fixing nails (324) penetrate the movable opening and closing leaf (323) from top to bottom and are slidably connected to the top of the telescopic cross arm body (1).

4. The cross arm with adjustable length according to claim 1, characterized in that: The rotating fixing component (2) comprises a fixing pin groove (21), wherein the fixing pin groove (21) is arranged in the middle of the common rear side of the two telescopic cross arm bodies (1), the fixing pin groove (21) is in an inverted T-shape, a fixing pin (23) is slidably and rotatably connected inside the fixing pin groove (21), a fixing retaining ring (22) is arranged on the right rear side of the raised part of the fixing pin groove (21), the front end of the fixing retaining ring (22) is fixedly connected to the right end of the rear side of the left telescopic cross arm body (1), and the fixing pin (23) is L-shaped and can be completely moved to the inside of the fixing pin groove (21) of the left telescopic cross arm body (1).

5. The cross arm with adjustable length according to claim 2, characterized in that: The telescopic cross arm body (1) comprises a cross arm main beam (11), a movable groove is provided inside the cross arm main beam (11), a plurality of fixed edges are evenly fixedly connected to the front and rear sides of the movable groove, a movable fixed component (12) is slidably connected in the movable groove, a cross arm extension beam (13) is fixedly connected to the top of the movable fixed component (12), and an end of the top of the cross arm main beam (11) close to the flip opening and closing axis (31) is slidably connected to the bottom end of the flip opening and closing leaf (32) on the same side.

6. The cross arm with adjustable length according to claim 5, characterized in that: The movable fixed assembly (12) comprises a movable support column (121), wherein the movable support column (121) penetrates the cross arm extension beam (13) and is fixedly connected to one end of the cross arm extension beam (13) close to the cross arm main beam (11), the top end of the movable support column (121) is slidably connected to the top end of the inner side of the cross arm main beam (11), and a plurality of left and right parallel fixed springs (122) are fixedly connected below the front and rear sides of the movable support column (121), and the fixed springs (122) on the same side are away from the movable support column (121). One end of the support column (121) is fixedly connected to a movable fixed block (124), the movable fixed block (124) is C-shaped and the bottom end extends to the outside of the bottom end of the cross arm main beam (11), the inner recesses of the two movable fixed blocks (124) are slidably connected to a movable synchronization ring (123), the inner side of the movable synchronization ring (123) is fixedly connected to the left and right sides of the movable support column (121), and the left and right sides of the movable fixed block (124) slide on the left and right ends of the inner side of the movable synchronization ring (123) respectively.

7. The cross arm with adjustable length according to claim 6, characterized in that: The length of the cross arm extension beam (13) is the same as that of the cross arm main beam (11), and the width of the movable fixed block (124) is equal to the distance between two adjacent fixed edges.

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