CN214044626U - Power equipment anticollision mechanism - Google Patents

Power equipment anticollision mechanism Download PDF

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Publication number
CN214044626U
CN214044626U CN202120064000.3U CN202120064000U CN214044626U CN 214044626 U CN214044626 U CN 214044626U CN 202120064000 U CN202120064000 U CN 202120064000U CN 214044626 U CN214044626 U CN 214044626U
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CN
China
Prior art keywords
sliding
group
groups
mounting
plates
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Expired - Fee Related
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CN202120064000.3U
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Chinese (zh)
Inventor
丁建功
孙静
汪国梁
董俊
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Tianjin Aite Future Technology Development Co ltd
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Tianjin Aite Future Technology Development Co ltd
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Priority to CN202120064000.3U priority Critical patent/CN214044626U/en
Application granted granted Critical
Publication of CN214044626U publication Critical patent/CN214044626U/en
Expired - Fee Related legal-status Critical Current
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Abstract

An anti-collision mechanism of electrical equipment comprises an anti-collision box, a limiting plate, a buffering assembly and an elastic cushion; the buffering assembly comprises a T-shaped block, a first sliding rod, a second sliding block, a second sliding rod, a second mounting plate, a third sliding rod and a fourth sliding block; a first mounting bin is arranged in the T-shaped block; the second sliding block is connected with a second sliding rod and is connected with the first mounting bin in a sliding manner; the second sliding rod penetrates through one side end of the T-shaped block; the first sliding rod is provided with a first sliding block, penetrates through the T-shaped block and is provided with a connecting rod; the connecting rod is connected with the fourth sliding block, and a first spring is arranged on the connecting rod; the second mounting plate is provided with a first mounting plate; the third sliding rod is provided with a third sliding block, and two groups of buffer assemblies are arranged on the inner wall of the anti-collision box side by side; the limiting plate is connected with the inner wall of the anti-collision box in a sliding mode and is connected with the second sliding rod; the elastic cushion is arranged on the inner wall of the crash box. The utility model discloses the anticollision is effectual, has improved the practicality of device.

Description

Power equipment anticollision mechanism
Technical Field
The utility model relates to an anticollision protective equipment technical field especially relates to a power equipment anticollision mechanism.
Background
With the development of science and technology, electric power equipment has become an indispensable product in production and life, and is used for transmitting electric energy to each subsystem in the whole electric power system, distributing the electric energy and providing corresponding electric power control. Due to the migration of the working environment and the replacement and maintenance of outdoor power equipment, the corresponding power equipment is often required to be transported to a fixed position in batches, and collision is inevitable in the transporting process.
The existing protection measures are basically that a protection box is manufactured to be matched with the size of power equipment, then the power equipment is placed in the protection box, anti-collision foam is sleeved on the outer side of the power equipment to prevent collision with the protection box, and the practicability is low.
SUMMERY OF THE UTILITY MODEL
Objects of the invention
For solving the technical problem that exists among the background art, the utility model provides a power equipment anticollision institution, the utility model discloses simple structure convenient to use, the anticollision is effectual, has improved the practicality of device.
(II) technical scheme
The utility model provides an anti-collision mechanism of electric power equipment, which comprises an anti-collision box, a limiting plate, a buffering assembly and an elastic cushion for placing the electric power equipment; the buffering assembly comprises a T-shaped block, a first sliding rod, a connecting rod, a second sliding block, a second sliding rod, a first sliding block, a first mounting plate, a second mounting plate, a third sliding rod, a third sliding block, a first spring and a fourth sliding block;
the T-shaped block is arranged in the anti-collision box, and a first mounting bin is arranged in the T-shaped block; the projection shape of the first installation bin is T-shaped; the second sliding block is connected with a second sliding rod and is connected with the inner wall of the first mounting bin in a sliding manner; the second sliding rod penetrates through one side end of the T-shaped block and is connected with the T-shaped block in a sliding mode; the first sliding rods, the first sliding blocks, the connecting rods, the first mounting plate, the fourth sliding block, the second mounting plate, the third sliding rods, the third sliding block and the first spring are respectively provided with two groups, and each group of first sliding rods is correspondingly connected with each group of first sliding blocks; the two groups of first sliding blocks are connected with the inner wall of the first mounting bin in a sliding manner; the two groups of first sliding rods respectively penetrate through the other two ends of the T-shaped block and are connected with the T-shaped block in a sliding mode, and one ends of the two groups of first sliding rods penetrating through the T-shaped block are respectively connected with the two groups of connecting rods; one end of each group of connecting rods, which is far away from each group of first sliding rods, penetrates through each group of first mounting plates and is connected with each group of fourth sliding blocks; each group of first springs is sleeved outside each group of connecting rods respectively, and two ends of each group of first springs are connected with each group of first mounting plates and each group of first sliding rods respectively; the two groups of first mounting plates are arranged in the anti-collision box, and a second mounting bin is arranged in each group of first mounting plates; each group of fourth sliding blocks is slidably connected with the inner wall of each group of second mounting bins; each group of second mounting plates is connected with each group of first mounting plates, and a third mounting bin is arranged in each group of second mounting plates; each group of third mounting bins is communicated with each group of second mounting bins; each group of third sliding rods is correspondingly connected with each group of third sliding blocks, and one end of each group of third sliding rods penetrates through each group of second mounting plates and is connected with each group of second mounting plates in a sliding manner; each group of third sliding blocks is connected with the inner wall of each group of third mounting bins in a sliding manner; the two groups of buffer assemblies are arranged on the inner wall of the anti-collision box side by side;
the two groups of limiting plates are arranged, the two groups of limiting plates are both connected with the inner wall of the anti-collision box in a sliding mode, and the end faces, far away from each other, of the two groups of limiting plates are respectively connected with the end faces, close to each other, of the two groups of second sliding rods;
the elastic cushion is arranged on the inner wall of the anti-collision box and is positioned between the two groups of limiting plates; the anti-collision box is provided with an installation door.
Preferably, the device further comprises a second spring, a sliding plate, a first supporting rod and a second supporting rod;
the inner wall of the anti-collision box is provided with a mounting groove; the sliding plates and the second springs are respectively provided with two groups, the two groups of sliding plates are respectively connected with the inner wall of the mounting groove in a sliding manner, and the two groups of sliding plates are respectively connected with the inner wall of the mounting groove through the two groups of second springs; the first support rod is rotatably connected with the second support rod, and two ends of the first support rod are respectively rotatably connected with the elastic pad and one group of sliding plates; two ends of the second support rod are respectively and rotatably connected with the elastic pad and the other group of sliding plates.
Preferably, the device further comprises a fixing plate and a third spring; the fixed plate is positioned between the two groups of sliding plates and is connected with the inner wall of the mounting groove; the third spring is equipped with two sets ofly, and two sets of third springs set up with two sets of second springs side by side, and the side end face of fixed plate is all connected to the one end of every group third spring, and two sets of sliding plates are connected respectively to the other end of every group third spring.
Preferably, the device further comprises an air bag; each group of limiting plates is provided with an air inlet and a fourth mounting bin; the two groups of fourth mounting bins are respectively provided with openings on the end surfaces of the two groups of limiting plates, which are close to each other; the air bags are provided with two groups, the two groups of air bags are respectively arranged at the two groups of openings, and the two groups of air bags are pressed tightly on the side end surface of the power equipment in a voltage sharing mode.
Preferably, each group of first sliding blocks is in sealed sliding connection with each group of first mounting bins; each group of second sliding blocks is also in sealed sliding connection with each group of first mounting bins.
Preferably, the second slider and the second sliding rod are of an integrally formed structure.
Preferably, each group of first mounting plates and each group of second mounting plates are of an integrally formed structure.
Compared with the prior art, the above technical scheme of the utility model following profitable technological effect has:
in the utility model, when in use, the power equipment is placed on the elastic pad, the two groups of limiting plates clamp the power equipment, when the anti-collision box is collided, the power equipment extrudes one group of limiting plates and pushes the second sliding rod and the second sliding block, so that the second sliding block is slidably connected with the inner wall of the first mounting bin to extrude the air in the first mounting bin; air in the first mounting bin pushes two groups of first sliding blocks to be connected with the inner wall of the first mounting bin in a sliding mode, so that two groups of first sliding rods are connected with the T-shaped blocks in a sliding mode, meanwhile, two groups of connecting rods and two groups of fourth sliding blocks are connected with two groups of first mounting plates in a sliding mode respectively, two groups of first springs are compressed, air in two groups of second mounting bins is squeezed into two groups of third mounting bins, two groups of third sliding rods and two groups of third sliding blocks are pushed to be connected with two groups of second mounting plates in a sliding mode respectively until the two groups of third sliding rods press the limiting plates, and the limiting plates are supported, so that buffering and collision prevention of power equipment are achieved; the utility model discloses simple structure convenient to use, the anticollision is effectual, has improved the practicality of device.
Drawings
Fig. 1 is the utility model provides a power equipment anticollision institution's schematic structure diagram.
Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a partially enlarged schematic view of a portion B in fig. 1.
Reference numerals: 1. an anti-collision box; 101. mounting grooves; 2. a T-shaped block; 201. a first installation bin; 3. a first slide bar; 4. a connecting rod; 5. a limiting plate; 501. a fourth installation bin; 6. an electrical device; 7. an air bag; 8. a second slider; 9. a second slide bar; 10. a first slider; 11. an elastic pad; 12. a second spring; 13. a sliding plate; 14. a first mounting plate; 1401. a second mounting bin; 15. a second mounting plate; 1501. a third installation bin; 16. a third slide bar; 17. a third slider; 18. a first spring; 19. a fourth slider; 20. a first support bar; 21. a second support bar; 22. a fixing plate; 23. and a third spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1-3, the utility model provides an electric power equipment anticollision mechanism, which comprises an anticollision box 1, a limiting plate 5, a buffer assembly and an elastic pad 11 for placing an electric power equipment 6; the buffering assembly comprises a T-shaped block 2, a first sliding rod 3, a connecting rod 4, a second sliding block 8, a second sliding rod 9, a first sliding block 10, a first mounting plate 14, a second mounting plate 15, a third sliding rod 16, a third sliding block 17, a first spring 18 and a fourth sliding block 19;
the T-shaped block 2 is arranged in the anti-collision box 1, and a first mounting bin 201 is arranged in the T-shaped block 2; the projection shape of the first mounting bin 201 is T-shaped; the second sliding block 8 is connected with a second sliding rod 9, and the second sliding block 8 is connected with the inner wall of the first mounting bin 201 in a sliding manner; the second sliding rod 9 penetrates through one side end of the T-shaped block 2 and is connected with the T-shaped block 2 in a sliding mode; two groups of first sliding rods 3, first sliding blocks 10, connecting rods 4, first mounting plates 14, fourth sliding blocks 19, second mounting plates 15, third sliding rods 16, third sliding blocks 17 and first springs 18 are arranged, and each group of first sliding rods 3 is correspondingly connected with each group of first sliding blocks 10; the two groups of first sliding blocks 10 are both connected with the inner wall of the first mounting bin 201 in a sliding manner; the two groups of first sliding rods 3 respectively penetrate through the other two ends of the T-shaped block 2 and are connected with the T-shaped block 2 in a sliding mode, and one end, penetrating through the T-shaped block 2, of each group of first sliding rods 3 is connected with the two groups of connecting rods 4 respectively; one end of each group of connecting rods 4, which is far away from each group of first sliding rods 3, penetrates through each group of first mounting plates 14 and is connected with each group of fourth sliding blocks 19; each group of first springs 18 is sleeved outside each group of connecting rods 4, and two ends of each group of first springs 18 are connected with each group of first mounting plates 14 and each group of first sliding rods 3 respectively; the two groups of first mounting plates 14 are arranged in the anti-collision box 1, and a second mounting bin 1401 is arranged in each group of first mounting plates 14; each group of fourth sliding blocks 19 is slidably connected with the inner wall of each group of second mounting bins 1401; each group of second mounting plates 15 is connected with each group of first mounting plates 14, and a third mounting bin 1501 is arranged in each group of second mounting plates 15; each group of third mounting bins 1501 is communicated with each group of second mounting bins 1401; each group of third sliding rods 16 is correspondingly connected with each group of third sliding blocks 17, and one end of each group of third sliding rods 16 penetrates through each group of second mounting plates 15 and is connected with each group of second mounting plates 15 in a sliding manner; each group of third sliding blocks 17 is slidably connected with the inner wall of each group of third mounting bins 1501; the two groups of buffer assemblies are arranged in parallel on the inner wall of the anti-collision box 1;
the two groups of limiting plates 5 are arranged, the two groups of limiting plates 5 are both connected with the inner wall of the anti-collision box 1 in a sliding mode, and the end faces, far away from each other, of the two groups of limiting plates 5 are respectively connected with the end faces, close to each other, of the two groups of second sliding rods 9;
the elastic cushion 11 is arranged on the inner wall of the crash box 1, and the elastic cushion 11 is positioned between the two groups of limiting plates 5; the anti-collision box 1 is provided with an installation door.
In the utility model, when in use, the power equipment 6 is placed on the elastic pad 11, the two groups of limiting plates 5 clamp the power equipment 6, when the crash box 1 is collided, the power equipment 6 extrudes one group of limiting plates 5 and pushes the second sliding rod 9 and the second sliding block 8, so that the second sliding block 8 is slidably connected with the inner wall of the first installation bin 201 to extrude the air in the first installation bin 201; air in the first mounting bin 201 pushes two groups of first sliders 10 to be connected with the inner wall of the first mounting bin 201 in a sliding mode, so that two groups of first sliding rods 3 are connected with the T-shaped block 2 in a sliding mode, meanwhile, two groups of connecting rods 4 and two groups of fourth sliders 19 are respectively connected with two groups of first mounting plates 14 in a sliding mode, two groups of first springs 18 are compressed, air in two groups of second mounting bins 1401 is squeezed into two groups of third mounting bins 1501, two groups of third sliding rods 16 and two groups of third sliders 17 are pushed to be respectively connected with two groups of second mounting plates 15 in a sliding mode until the two groups of third sliding rods 16 compress the limiting plates 5, and the limiting plates 5 are supported, so that buffering and collision prevention of the power equipment 6 are achieved; the utility model discloses simple structure convenient to use, the anticollision is effectual, has improved the practicality of device.
In an alternative embodiment, the device further comprises a second spring 12, a sliding plate 13, a first supporting rod 20 and a second supporting rod 21;
the inner wall of the anti-collision box 1 is provided with a mounting groove 101; two groups of sliding plates 13 and two groups of second springs 12 are arranged, the two groups of sliding plates 13 are connected with the inner wall of the mounting groove 101 in a sliding manner, and the two groups of sliding plates 13 are respectively connected with the inner wall of the mounting groove 101 through the two groups of second springs 12; the first support rod 20 is rotatably connected with the second support rod 21, and two ends of the first support rod 20 are respectively rotatably connected with the elastic pad 11 and one group of sliding plates 13; two ends of the second support rod 21 are respectively and rotatably connected with the elastic pad 11 and the other group of sliding plates 13; the first and second support rods 20 and 21 are pushed by the second spring 12 and the sliding plate 13 so that the elastic pad 11 supports the power device 6, and the power device 6 is buffered and protected by compressing the second spring 12 in the event of a shock.
In an alternative embodiment, a fixing plate 22 and a third spring 23 are further included; the fixed plate 22 is positioned between the two sets of sliding plates 13, and the fixed plate 22 is connected with the inner wall of the mounting groove 101; two groups of third springs 23 are arranged, the two groups of third springs 23 and the two groups of second springs 12 are arranged side by side, one end of each group of third springs 23 is connected with the side end face of the fixed plate 22, and the other end of each group of third springs 23 is connected with the two groups of sliding plates 13 respectively; the fixed plate 22 and the third spring 23 are arranged to make resistance to the two sliding plates 13 pushed by the elastic pad 11, the first support rod 20 and the second support rod 21 when the electric device 6 vibrates, so as to further buffer the electric device 6.
In an alternative embodiment, it further comprises a balloon 7; each group of limiting plates 5 is provided with an air inlet and a fourth mounting bin 501; the two groups of fourth mounting bins 501 are respectively provided with openings on the end surfaces of the two groups of limiting plates 5 which are close to each other; the air bags 7 are provided with two groups, the two groups of air bags 7 are respectively arranged at the two groups of openings, and the two groups of air bags 7 are pressed tightly on the side end surface of the power equipment 6; can adapt to the power equipment 6 of different sizes by controlling how much of gas in gasbag 7, gasbag 7 makes power equipment 6 can not direct contact limiting plate 5 simultaneously, when the collision takes place, can carry out further protection to power equipment 6.
In an alternative embodiment, each set of first sliding blocks 10 is in sealed sliding connection with each set of first installation bins 201; each group of second sliding blocks 8 is also in sealed sliding connection with each group of first mounting bins 201; all be equipped with the sealing washer on first slider 10 and the second slider 8 for gas in the first installation bin 201 can not reveal when first slider 10 and second slider 8 slide, makes the buffering effect of device obvious.
In an alternative embodiment, the second slider 8 and the second sliding rod 9 are of an integrally formed structure; the integrally formed second sliding block 8 and the second sliding rod 9 are connected more firmly, so that the service life of the second sliding block 8 and the service life of the second sliding rod 9 are prolonged.
In an alternative embodiment, each set of first mounting plates 14 and each set of second mounting plates 15 are of unitary construction; the integrated first mounting plate 14 and the second mounting plate 15 are connected more firmly, and the service life of the first mounting plate 14 and the service life of the second mounting plate 15 are prolonged.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (7)

1. The electric equipment anti-collision mechanism is characterized by comprising an anti-collision box (1), a limiting plate (5), a buffer assembly and an elastic pad (11) for placing electric equipment (6); the buffer assembly comprises a T-shaped block (2), a first sliding rod (3), a connecting rod (4), a second sliding block (8), a second sliding rod (9), a first sliding block (10), a first mounting plate (14), a second mounting plate (15), a third sliding rod (16), a third sliding block (17), a first spring (18) and a fourth sliding block (19);
the T-shaped block (2) is arranged in the anti-collision box (1), and a first mounting bin (201) is arranged in the T-shaped block (2); the projection shape of the first installation bin (201) is T-shaped; the second sliding block (8) is connected with a second sliding rod (9), and the second sliding block (8) is connected with the inner wall of the first mounting bin (201) in a sliding manner; the second sliding rod (9) penetrates through one side end of the T-shaped block (2) and is connected with the T-shaped block (2) in a sliding mode; the first sliding rods (3), the first sliding blocks (10), the connecting rod (4), the first mounting plate (14), the fourth sliding block (19), the second mounting plate (15), the third sliding rods (16), the third sliding block (17) and the first spring (18) are respectively provided with two groups, and each group of first sliding rods (3) is correspondingly connected with each group of first sliding blocks (10); the two groups of first sliding blocks (10) are connected with the inner wall of the first mounting bin (201) in a sliding manner; the two groups of first sliding rods (3) respectively penetrate through the other two ends of the T-shaped block (2) and are connected with the T-shaped block (2) in a sliding mode, and one ends, penetrating through the T-shaped block (2), of the two groups of first sliding rods (3) are respectively connected with the two groups of connecting rods (4); one end, far away from each group of first sliding rods (3), of each group of connecting rods (4) penetrates through each group of first mounting plates (14) and is connected with each group of fourth sliding blocks (19); each group of first springs (18) is sleeved outside each group of connecting rods (4) respectively, and two ends of each group of first springs (18) are connected with each group of first mounting plates (14) and each group of first sliding rods (3) respectively; two groups of first mounting plates (14) are arranged in the anti-collision box (1), and a second mounting bin (1401) is arranged in each group of first mounting plates (14); each group of fourth sliding blocks (19) is connected with the inner wall of each group of second mounting bins (1401) in a sliding manner; each group of second mounting plates (15) is connected with each group of first mounting plates (14), and a third mounting bin (1501) is arranged in each group of second mounting plates (15); each group of third mounting bins (1501) is communicated with each group of second mounting bins (1401); each group of third sliding rods (16) is correspondingly connected with each group of third sliding blocks (17), and one end of each group of third sliding rods (16) penetrates through each group of second mounting plates (15) and is connected with each group of second mounting plates (15) in a sliding manner; each group of third sliding blocks (17) is in sliding connection with the inner wall of each group of third mounting bins (1501); the two groups of buffer assemblies are arranged on the inner wall of the anti-collision box (1) side by side;
the two groups of limiting plates (5) are arranged, the two groups of limiting plates (5) are connected with the inner wall of the anti-collision box (1) in a sliding mode, and the end faces, far away from each other, of the two groups of limiting plates (5) are respectively connected with the end faces, close to each other, of the two groups of second sliding rods (9);
the elastic cushion (11) is arranged on the inner wall of the crash box (1), and the elastic cushion (11) is positioned between the two groups of limiting plates (5); the anti-collision box (1) is provided with a mounting door.
2. The power equipment collision avoidance mechanism of claim 1, further comprising a second spring (12), a sliding plate (13), a first support bar (20) and a second support bar (21);
the inner wall of the anti-collision box (1) is provided with a mounting groove (101); two groups of sliding plates (13) and two groups of second springs (12) are arranged, the two groups of sliding plates (13) are connected with the inner wall of the mounting groove (101) in a sliding mode, and the two groups of sliding plates (13) are connected with the inner wall of the mounting groove (101) through the two groups of second springs (12) respectively; the first support rod (20) is rotatably connected with the second support rod (21), and two ends of the first support rod (20) are respectively rotatably connected with the elastic pad (11) and one group of sliding plates (13); two ends of the second support rod (21) are respectively and rotatably connected with the elastic pad (11) and the other group of sliding plates (13).
3. The power equipment collision avoidance mechanism of claim 2, further comprising a fixing plate (22) and a third spring (23); the fixed plate (22) is positioned between the two groups of sliding plates (13), and the fixed plate (22) is connected with the inner wall of the mounting groove (101); the third springs (23) are provided with two groups, the two groups of third springs (23) and the two groups of second springs (12) are arranged side by side, one end of each group of third springs (23) is connected with the side end face of the fixed plate (22), and the other end of each group of third springs (23) is connected with the two groups of sliding plates (13) respectively.
4. An electric power equipment collision avoidance mechanism according to claim 1 further comprising an air bag (7); each group of limiting plates (5) is provided with an air inlet and a fourth mounting bin (501); the two groups of fourth mounting bins (501) are respectively provided with openings on the end surfaces of the two groups of limiting plates (5) close to each other; the air bags (7) are provided with two groups, the two groups of air bags (7) are respectively arranged at the two groups of openings, and the two groups of air bags (7) are pressed tightly on the side end surface of the power equipment (6).
5. The anti-collision mechanism for the electrical equipment is characterized in that each group of first sliding blocks (10) is in sealed sliding connection with each group of first mounting bins (201); each group of second sliding blocks (8) is also in sealed sliding connection with each group of first mounting bins (201).
6. The power equipment anticollision mechanism according to claim 1, characterized in that the second slider (8) and the second sliding rod (9) are of an integral structure.
7. An electrical equipment anticollision mechanism according to claim 1, characterized in that each set of first mounting plates (14) and each set of second mounting plates (15) are of one-piece construction.
CN202120064000.3U 2021-01-11 2021-01-11 Power equipment anticollision mechanism Expired - Fee Related CN214044626U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120064000.3U CN214044626U (en) 2021-01-11 2021-01-11 Power equipment anticollision mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120064000.3U CN214044626U (en) 2021-01-11 2021-01-11 Power equipment anticollision mechanism

Publications (1)

Publication Number Publication Date
CN214044626U true CN214044626U (en) 2021-08-24

Family

ID=77346430

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120064000.3U Expired - Fee Related CN214044626U (en) 2021-01-11 2021-01-11 Power equipment anticollision mechanism

Country Status (1)

Country Link
CN (1) CN214044626U (en)

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Granted publication date: 20210824