CN110641540A - Brake structure for multifunctional medical combined central control wheel - Google Patents
Brake structure for multifunctional medical combined central control wheel Download PDFInfo
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- CN110641540A CN110641540A CN201910978582.3A CN201910978582A CN110641540A CN 110641540 A CN110641540 A CN 110641540A CN 201910978582 A CN201910978582 A CN 201910978582A CN 110641540 A CN110641540 A CN 110641540A
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- 238000005452 bending Methods 0.000 claims description 16
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 210000001503 joint Anatomy 0.000 claims 1
- 238000000034 method Methods 0.000 description 10
- 230000020347 spindle assembly Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/04—Braking mechanisms; Locking devices against movement
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Abstract
The invention relates to a brake structure for a multifunctional medical combined central control wheel, which comprises a brake box, wherein a main shaft axial locking component, a first shifting fork, a gear tooth locking component, a second shifting fork and a main shaft radial locking component which are used for realizing the directional function are respectively arranged in the brake box. The invention has simple structure and convenient use, and can ensure that enterprise workers can assemble the components at one time by integrating the main shaft axial locking component, the first shifting fork, the gear tooth locking component and the main shaft radial locking component in the brake box, thereby greatly improving the assembly efficiency. The setting of main shaft axial locking subassembly, first shift fork, teeth of a cogwheel locking subassembly and main shaft radial locking subassembly can realize full brake state, free state and orientation state respectively, has satisfied customer's user demand.
Description
Technical Field
The invention relates to the field of central control wheels, in particular to a brake structure for a multifunctional medical combined central control wheel.
Background
With the development of the medical level in China, more and more heavy medical equipment and intelligent medical equipment are produced at the same time, and high precision and high stability become the necessary conditions of the intelligent medical equipment. As a support wheel structure of current mainstream medical equipment, a universal center wheel has been widely applied to various intelligent medical equipment.
At present, each spare part is independent among traditional well accuse wheel structure, assembles simultaneously by a plurality of workman on the production line in assembling process, and this kind of assembled mode wastes time and energy, has not only increased the personnel selection cost of enterprise, has still improved workman's intensity of labour, greatly reduced production efficiency. In addition, the traditional central control wheel can not realize the synchronous locking or orientation function of the main shaft and the wheel body.
Disclosure of Invention
The invention aims at the existing problems, researches and improvements are carried out by the applicant, and a brake structure for a multifunctional medical combined type central control wheel is provided.
The technical scheme adopted by the invention is as follows:
a brake structure for multi-functional medical combination formula well accuse wheel, including the brake box, in the inside of brake box sets up main shaft axial locking subassembly, first shift fork, the teeth of a cogwheel locking subassembly, second shift fork and the radial locking subassembly that are used for realizing directional function respectively, first shift fork, second shift fork are changeed inside the brake box respectively, main shaft axial locking subassembly is located first portion of first shift fork and is used for transmitting the axial displacement pair, first shift fork is used for turning into the revolute pair with the axial displacement pair, the teeth of a cogwheel locking subassembly is located the lower half of first shift fork and second shift fork and is used for turning into the revolute pair with the revolute pair, the second shift fork is used for turning into the revolute pair the one end bending type that the radial locking subassembly of second shift fork docked main shaft becomes the portion of bending, the radial locking subassembly of main shaft is located first portion of second shift fork and is used for turning into the revolute pair with the revolute pair that the second shift fork transmitted .
The further technical scheme is as follows:
the main shaft axial locking assembly comprises a directional brake block, directional brake pads arranged on the front side and the rear side of the directional brake block and a pair of first return springs positioned at the bottom of the directional brake block, and each first return spring is arranged in the brake box;
the upper half part of each directional brake pad is provided with an assembly bayonet used for abutting against a boss of the directional brake pad, the assembly bayonet enables the upper half part of the directional brake pad to form a first extension tooth part and a second extension tooth part, the lower half part of each directional brake pad extends to form a first lug part, and the first lug part is provided with a pin hole used for installing a positioning pin;
the length of the first extension tooth part is not equal to that of the second extension tooth part;
the gear tooth locking assembly comprises a gear tooth movable sliding block, an adjusting block is embedded in the gear tooth movable sliding block, an opening for a second shifting fork to extend into is formed in the gear tooth movable sliding block, a through hole is formed in the center of the adjusting block, a gear tooth brake block is assembled in the through hole, and two ends of the gear tooth brake block extend out of the gear tooth movable sliding block respectively;
one side of the gear tooth movable sliding block, which is close to the first shifting fork, is extended to form second lug parts, and a first fixing pin is arranged between the second lug parts; a fourth reset spring for driving the second shifting fork to reset is further arranged in the opening, and a fifth reset spring for driving the gear tooth movable sliding block to reset is further arranged inside the gear tooth movable sliding block and on one side of the adjusting block;
in the brake box, the outer sides of the upper half part and the lower half part on the other side of the gear tooth movable sliding block are respectively abutted with a second return spring and a third return spring;
the main shaft radial locking assembly comprises a main shaft radial brake block, and a second shifting fork bending part assembling hole for the bending part of the second shifting fork to extend into is formed in the main shaft radial brake block.
The invention has the following beneficial effects:
the invention has simple structure and convenient use, and can ensure that enterprise workers can assemble the components at one time by integrating the main shaft axial locking component, the first shifting fork, the gear tooth locking component and the main shaft radial locking component in the brake box, thereby greatly improving the assembly efficiency. The setting of main shaft axial locking subassembly, first shift fork, teeth of a cogwheel locking subassembly and main shaft radial locking subassembly can realize full brake state, free state and orientation state respectively, has satisfied customer's user demand. Meanwhile, the reset spring and the adjusting block are additionally arranged in the gear tooth locking assembly, so that the gear tooth brake pad can be automatically adjusted and clamped into the gear tooth disc again after being blocked, and the self-adjusting performance is high. The directional brake block adopts an asymmetric design, so that the bearing wheel can be ensured to advance along the pushing direction of a user in a directional state, and the condition of retrograde motion is avoided.
Drawings
FIG. 1 is a schematic view of the structure of the spindle assembly of the present invention.
Fig. 2 is a schematic view of the internal structure of the present invention.
FIG. 3 is a schematic structural diagram of a half of the cartridge of the present invention.
FIG. 4 is a top view of the cog locking assembly of the present invention.
FIG. 5 is an isometric view of the cog locking assembly of the present invention.
FIG. 6 is a schematic view of the connection between the gear tooth brake pad and the adjusting block of the present invention.
FIG. 7 is a bottom view of the cog locking assembly of the present invention.
FIG. 8 is a schematic view of the connection between the inner structure of the brake housing and the spindle assembly according to the present invention.
FIG. 9 is a cross-sectional view of the connection of the present invention to a spindle assembly.
FIG. 10 is a schematic structural view of the center wheel without the bearing wheel cover.
FIG. 11 is a schematic diagram of the pushing direction and the center control orientation state of the user.
Wherein: 1. a spindle assembly; 101. an adjustment hole; 102. a cam; 1031. a square head; 103. a main shaft; 2. A brake box body; 201. a main shaft radial locking assembly movable groove; 202. the second shifting fork is embedded in the groove; 2031. a directional brake block assembly groove; 2032. a first return spring mounting groove; 204. a wheel brake pad moving slot; 205. a second return spring mounting groove; 206. a third return spring mounting groove; 207. an outward-expanding boss; 2071. a movable open slot; 3. a spindle brake tooth; 301. a lower gullet; 302. an outer gullet; 4. directional brake blocks; 5. a directional brake pad; 501. a first ear portion; 502. a first elongate tooth portion; 503. assembling a bayonet; 504. a second elongate tooth portion; 505. a first return spring; 6. positioning pins; 7. a first shift fork; 701. a first rotation pin; 8. a gear tooth locking assembly; 801. a gear tooth movable sliding block; 802. a gear tooth brake pad; 803. a fourth return spring; 804. a first fixing pin; 805. an adjusting block; 8051. a through hole; 806. a fifth return spring assembly boss; 807. a fifth return spring; 808. a second ear; 809. an opening; 810. a second fixing pin; 811. a first return spring; 9. a second return spring; 10. a third return spring; 11. a second fork; 1101. a second rotation pin; 1102. a bending part; 12. a main shaft radial brake pad; 1201. a second shifting fork bending part assembling hole; 13. a wheel axle; 14. and (4) a wheel gear disc.
Detailed Description
The following describes specific embodiments of the present invention.
As shown in fig. 1, the brake structure for the multifunctional medical combined central control wheel includes a brake box, a spindle axial locking component for implementing directional function, a first shifting fork 7, a gear tooth locking component 8 for implementing full brake function, a second shifting fork 11 and a spindle radial locking component are respectively arranged in the brake box, the first shifting fork 7 and the second shifting fork 11 are respectively switched in the brake box, the spindle axial locking component is located at the upper half part of the first shifting fork 7 and is used for transmitting an axial moving pair, the first shifting fork 7 is used for converting the axial moving pair into a revolute pair, the gear tooth locking component 8 is located at the lower half parts of the first shifting fork 7 and the second shifting fork 11 and is used for converting the revolute pair into a revolute pair, the second shifting fork 11 is used for converting the revolute pair into a revolute pair, a bending part 1102 is formed by bending at one end of the second shifting fork 11, and the spindle radial locking component is located at the upper half part of the second shifting fork 11 and is used for transmitting rotation The pair is converted into a moving pair.
As shown in fig. 2, the spindle axial locking assembly includes a directional brake block 4, directional brake pads 5 installed on the front and rear sides of the directional brake block 4, and a pair of first return springs 505 located at the bottom of the directional brake block 5, and each first return spring 505 is installed in the brake housing. As shown in fig. 2, an assembly bayonet 503 for abutting against a boss of the directional brake pad 4 is formed in an upper half portion of each directional brake pad 5, the assembly bayonet 503 forms a first extension tooth portion 502 and a second extension tooth portion 504 in the upper half portion of the directional brake pad 5, a first lug portion 501 is formed by extending the lower half portion of each directional brake pad 5, and a pin hole for mounting a positioning pin 6 is formed in the first lug portion 501. The length of the first elongated tooth 502 is not equal to the length of the second elongated tooth 504. The length of the first elongated tooth portion 502 is greater than the second elongated tooth portion 504 in this embodiment.
As shown in fig. 2 and 8, lower tooth grooves 301 having the same length as the first extended tooth portion 502 and the second extended tooth portion 504 are formed in the bottom of the spindle brake tooth 3, and outer tooth grooves 302 for engaging with the spindle radial brake pad 12 are formed in the outer ring of the spindle brake tooth 31 in the circumferential direction.
As shown in fig. 4 to 7, the gear tooth locking assembly 8 includes a gear tooth movable slider 801, an adjusting block 805 is embedded inside the gear tooth movable slider 801, an opening 809 for inserting the second fork 11 is further formed on the gear tooth movable slider 801, a through hole 8051 is formed in the center of the adjusting block 805, a gear tooth brake pad 802 is assembled in the through hole 8051, and two ends of the gear tooth brake pad 802 respectively extend out of the gear tooth movable slider 801. A second lug part 808 is formed by extending from one side of the gear tooth movable sliding block 801 close to the first shifting fork 7, and a first fixing pin 804 is arranged between the second lug parts 808; a fourth return spring 803 for driving the second fork 11 to return is further disposed in the opening 809, and a fifth return spring 807 for driving the gear teeth movable sliding block 801 to return is further disposed inside the gear teeth movable sliding block 801 and on one side of the adjusting block 805.
One end of the fifth return spring 807 abuts against the fifth return spring mounting boss 806, and the fifth return spring mounting boss 806 is disposed at one side of the opening 809. In the brake box, the upper half part and the lower half part on the other side of the gear tooth movable slide block 801 are also respectively abutted against a second return spring 9 and a third return spring 10, wherein the second return spring 9 is installed in the second return spring installation groove 205, and the third return spring 10 is installed in the third return spring installation groove 206. A second fixing pin 810 is further installed at the position where the gear tooth movable sliding block 801 is provided with an opening 809, and the second fixing pin 810 is used for limiting the second shifting fork 11 after the second shifting fork rotates.
The main shaft radial locking assembly comprises a main shaft radial brake block 12, the main shaft radial brake block 12 is installed in a main shaft radial locking assembly movable groove 201, a second shifting fork embedded groove 202 for enabling a bending part 1102 of a second shifting fork 11 to stretch into is further formed in the main shaft radial locking assembly movable groove 201, a second shifting fork bending part assembling hole 1201 is formed in the main shaft radial brake block 12, and the second shifting fork bending part assembling hole 1201 is used for enabling the bending part 1102 of the second shifting fork 11 to stretch into and driving the main shaft radial brake block 12 to move.
The specific working process of the invention is as follows:
and (3) full braking state:
as shown in fig. 9 and 10, the spindle assembly 1 includes a cam 102 having an adjustment hole 101, a square head 1031, and a spindle 103, and the wheel shaft 13 penetrates each brake housing 2. The assembly is inserted into the adjusting hole 101 and rotated, the assembly rotates to drive the cam 102 to rotate, the convex end of the cam 102 contacts the square head 1031 and drives the main shaft 103 to move downwards for 4mm, one end of the bottom of the main shaft 103 is driven by a downward force to contact the directional brake block 4, and the directional brake block 4 is stressed and compresses the first return spring 505. As shown in fig. 2 and 8, the directional brake block 4 moves downward to press the first fork 7 through the positioning pin 6 connected between the first lug portions 501 of the directional brake pads 5 on both sides, the first fork 7 rotates counterclockwise with the first rotating pin 701 as a rotating point, so that one end of the first fork 7 contacts the first fixing pin 804 between the second lug portions 808 of the gear tooth locking assembly 8, thereby realizing that the gear tooth movable slider 801 moves in the horizontal direction, one side of the gear tooth movable slider 801 applies force to the second return spring 9 and the third return spring 10 respectively during the moving process, in the process, as shown in fig. 1, 2 and 8, the gear tooth movable slider 801 is further provided with an adjusting block 805 with a gear tooth brake pad 802, so that the gear tooth brake pad 802 is clamped into the tooth slot of the gear disc 14 after moving, thereby limiting the rotation of the bearing wheel. As shown in fig. 2, one end of the second fork 11 extends into the opening 809 of the gear-tooth movable sliding block 801 and abuts against the second fixed pin 810, so that a space is provided for the second fork 11 to rotate along the second rotating pin 801 in the sliding process of the gear-tooth movable sliding block 801, as shown in fig. 2 and 8, two ends of the second fork 11 respectively move in opposite directions, because the bent portion 1102 of the second fork 11 extends into the second fork bent portion assembling hole 1201 of the spindle radial brake pad 12, the second fork 11 transmits the revolute pair to the spindle radial brake pad 12 after rotating to form a revolute pair, and the spindle radial brake pad 12 is gradually clamped into the external tooth groove 302 of the spindle brake tooth 3 in the moving process, thereby achieving the axial and radial locking of the spindle 103 in the spindle assembly 1, and simultaneously locking of the bearing wheel, and entering a full-braking state.
When the wheel tooth brake block 802 in the wheel tooth movable sliding block 801 encounters resistance in the movement process, the resistance influences the wheel tooth brake block to be clamped into the tooth groove of the wheel tooth disc 14, in the process, the adjusting block 805 is influenced by the resistance to generate a reaction force and reversely push the fifth return spring 807, and the adjusting block 805 and the wheel tooth brake block 802 are fixed through screws, so that the wheel tooth brake block 802 is retreated in a reciprocating manner, the wheel tooth brake block 802 is clamped into the wheel tooth disc 14 again after being adjusted when the bearing wheel moves at 360 degrees, and the bearing wheel is locked.
Free state:
after the cam 102 is rotated reversely, the main shaft 103 is reset, so that the main shaft axial locking assembly, the gear tooth locking assembly 88 and the main shaft radial locking assembly are reset, the whole central control wheel enters a free state, the main shaft brake teeth 3 and the gear tooth disc 14 are not locked in the state, and the main shaft of the central control wheel can rotate along the universal direction and also move forwards and backwards.
Orientation state:
when the cam 102 is continuously turned to the next stop station, the main shaft 103 moves upwards by 2mm, as shown in fig. 2, the first return spring 505 is not pressed by the directional brake block 4 any more and then recovers deformation and drives the directional brake block 4 and the directional brake pad 5 to move upwards, and the first extension tooth part 502 and the second extension tooth part 504 of the directional brake pad 5 are respectively clamped into the lower tooth groove 301 in the upward process of the directional brake pad 5, so that the directional state is realized, and the main shaft 103 cannot rotate. In the process, the first shifting fork 7 is not stressed to move, so that the gear plate 14 is not locked, and the bearing wheel 5 is not limited at all and is in a free rotation state.
As shown in fig. 11, since the lengths of the first extended tooth portion 502 and the second extended tooth portion 504 are not equal, the bearing wheel always advances along the pushing direction of the user in the oriented state by using an asymmetric design, so as to avoid the situation (as shown in the small figure in fig. 11) that the bearing wheel is opposite to the pushing direction of the user.
The invention has simple structure and convenient use, and can ensure that enterprise workers can assemble the components at one time by integrating the main shaft axial locking component, the first shifting fork, the gear tooth locking component and the main shaft radial locking component in the brake box, thereby greatly improving the assembly efficiency. The setting of main shaft axial locking subassembly, first shift fork, teeth of a cogwheel locking subassembly and main shaft radial locking subassembly can realize full brake state, free state and orientation state respectively, has satisfied customer's user demand. Meanwhile, the reset spring and the adjusting block are additionally arranged in the gear tooth locking assembly, so that the gear tooth brake pad can be automatically adjusted and clamped into the gear tooth disc again after being blocked, and the self-adjusting performance is high. The directional brake block adopts an asymmetric design, so that the bearing wheel can be ensured to advance along the pushing direction of a user in a directional state, and the condition of retrograde motion is avoided.
The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, the scope of the invention being defined by the appended claims, which may be modified in any manner without departing from the basic structure thereof.
Claims (8)
1. A brake structure for accuse wheel in multi-functional medical combination formula, its characterized in that: including the brake box, in the inside of brake box sets up main shaft axial locking subassembly, first shift fork (7) that are used for realizing directional function respectively, be used for realizing teeth of a cogwheel locking subassembly (8), second shift fork (11) and the radial locking subassembly of main shaft of full brake function, first shift fork (7), second shift fork (11) switch over respectively inside the brake box, main shaft axial locking subassembly is located first portion of first shift fork (7) and is used for transmitting the axial sliding pair, first shift fork (7) are used for turning into the axial sliding pair revolute pair, teeth of a cogwheel locking subassembly (8) are located the lower half of first shift fork (7) and second shift fork (11) and are used for turning into the revolute pair, second shift fork (11) are used for turning into the revolute pair with the sliding pair, the one end bending formation portion of bending (1102) of second shift fork (11) butt joint main shaft radial locking subassembly, the main shaft radial locking assembly is positioned at the upper half part of the second shifting fork (11) and is used for converting a revolute pair transmitted by the second shifting fork (11) into a revolute pair.
2. The brake structure for the multifunctional medical combined central control wheel according to claim 1, wherein: the main shaft axial locking assembly comprises a directional brake block (4), directional brake blocks (5) arranged on the front side and the rear side of the directional brake block (4) and a pair of first return springs (505) positioned at the bottom of the directional brake block (5), and each first return spring (505) is arranged in the brake box.
3. The brake structure for the multifunctional medical combined central control wheel according to claim 2, wherein: the first half of each directional brake piece (5) is seted up and is used for butt directional brake piece (4) boss assembly bayonet socket (503), assembly bayonet socket (503) make the first extension tooth portion (502) of first portion formation and second extension tooth portion (504) of directional brake piece (5), extend in the lower half of each directional brake piece (5) and form first ear (501), set up the pinhole that is used for installing locating pin (6) on first ear (501).
4. The brake structure for the multifunctional medical combined central control wheel according to claim 3, wherein: the length of the first elongated tooth (502) is not equal to the length of the second elongated tooth (504).
5. The brake structure for the multifunctional medical combined central control wheel according to claim 1, wherein: the gear tooth locking assembly (8) comprises a gear tooth movable sliding block (801), an adjusting block (805) is embedded in the gear tooth movable sliding block (801), an opening (809) for the second shifting fork (11) to extend into is further formed in the gear tooth movable sliding block (801), a through hole (8051) is formed in the center of the adjusting block (805), a gear tooth brake pad (802) is assembled in the through hole (8051), and the two ends of the gear tooth brake pad (802) extend out of the gear tooth movable sliding block (801) respectively.
6. The brake structure for the multifunctional medical combined central control wheel according to claim 3, wherein: a second lug part (808) is formed by extending the side of the gear tooth movable sliding block (801) close to the first shifting fork (7), and a first fixing pin (804) is arranged between the second lug parts (808); a fourth return spring (803) for driving the second shifting fork (11) to reset is further arranged in the opening (809), and a fifth return spring (807) for driving the gear tooth movable sliding block (801) to reset is further arranged inside the gear tooth movable sliding block (801) and on one side of the adjusting block (805).
7. The brake structure for the multifunctional medical combined central control wheel according to claim 3, wherein: in the brake box, the outer sides of the upper half part and the lower half part of the other side of the gear tooth movable sliding block (801) are respectively abutted with a second return spring (9) and a third return spring (10).
8. The brake structure for the multifunctional medical combined central control wheel according to claim 1, wherein: the main shaft radial locking assembly comprises a main shaft radial brake block (12), and a second shifting fork bending part assembling hole (1201) used for enabling a bending part (1102) of the second shifting fork (11) to stretch into is formed in the main shaft radial brake block (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910978582.3A CN110641540B (en) | 2019-10-15 | 2019-10-15 | Braking structure for multifunctional medical combined central control wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910978582.3A CN110641540B (en) | 2019-10-15 | 2019-10-15 | Braking structure for multifunctional medical combined central control wheel |
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| Publication Number | Publication Date |
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| CN110641540A true CN110641540A (en) | 2020-01-03 |
| CN110641540B CN110641540B (en) | 2024-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910978582.3A Active CN110641540B (en) | 2019-10-15 | 2019-10-15 | Braking structure for multifunctional medical combined central control wheel |
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| CN207758484U (en) * | 2017-12-12 | 2018-08-24 | 中山市威玛金属制品有限公司 | A kind of castor with shift fork brake |
| CN208216424U (en) * | 2018-05-25 | 2018-12-11 | 无锡市中冠物流设备有限公司 | Medical antiwind middle control wheel |
| CN210822415U (en) * | 2019-10-15 | 2020-06-23 | 无锡市中冠物流设备有限公司 | Brake structure for multifunctional medical combined central control wheel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19611902A1 (en) * | 1996-03-26 | 1997-10-02 | Rhombus Rollen Gmbh & Co | Shopping trolley steering roller with fork wheels engaging belt grooves |
| DE10309741A1 (en) * | 2003-03-06 | 2004-09-16 | Wanzl Metallwarenfabrik Gmbh | Roller and a transport trolley equipped with the roller |
| CN201006719Y (en) * | 2006-12-26 | 2008-01-16 | 秦正江 | Trammer, bed for child universal direction varying device |
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| Publication number | Publication date |
|---|---|
| CN110641540B (en) | 2024-07-02 |
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Address after: 214000 Yanyu Road, Qianzhou supporting area, Huishan Economic Development Zone, Wuxi City, Jiangsu Province Applicant after: Wuxi Zhongguan Medical Equipment Co.,Ltd. Address before: 214000 Yanyu Road, Qianzhou supporting area, Huishan Economic Development Zone, Wuxi City, Jiangsu Province Applicant before: WUXI ZHONGGUAN LOGISTICS EQUIPMENT Co.,Ltd. |
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