CN220374196U - Folding castor mechanism capable of self-locking - Google Patents

Abstract

The utility model discloses a self-locking folding castor mechanism which comprises a castor support frame (1), a castor connecting block (2), a universal wheel assembly (3), a draw hook assembly (4) and a locking castor assembly (5); the trundle connecting block (2) is fixed at the bottom end of the trundle supporting frame (1); the universal wheel assembly (3) comprises a bearing cover (301), a rotating block (302), a supporting shaft (303), a caster shaft (304), a caster frame (305), a tensioning block (306), a pin shaft (307) and a caster (308); the supporting shaft (303) is longitudinally and fixedly connected with the pulley frame (305); the upper side and the lower side of the rotating block (302) are assembled on the supporting shaft (303) through the deep groove ball bearings (309), and the bearing cover (301) is arranged outside the deep groove ball bearings (309) positioned on the upper side.

Description

Folding castor mechanism capable of self-locking

Technical Field

The utility model relates to the technical field of folding casters, in particular to a self-locking folding caster mechanism.

Background

The existing folding castor mainly comprises folding castor, round pin axle 1, round pin axle 2, nut etc. when the support car is out of the case, need to unscrew the nut earlier, round pin axle 2 takes off, and folding castor is worn with round pin axle 2 after rotatory 90 anticlockwise around round pin axle 1, with the nut fixed, realizes the transfer of castor, and in the same way, when the castor needs to pack up, need unscrew the nut earlier, take off round pin axle 2, folding castor is packed up the castor around round pin axle 1 clockwise rotation 90, penetrates round pin axle 2 again, screws up the nut, fixes the folding castor. The folding castor with the structure is complex in operation, and a tool is needed when the nut is unscrewed, so that the castor is long in service time and the working time is prolonged.

Therefore, there is a need to find a self-locking folding caster mechanism that solves the above-mentioned problems.

Disclosure of Invention

In order to overcome the technical defects that the existing folding castor is complex in operation and long in time consumption, the utility model provides a self-locking folding castor mechanism.

The utility model is realized by adopting the following technical scheme:

the utility model provides a but folding truckle mechanism of auto-lock, includes truckle support frame, truckle connecting block, universal wheel subassembly, drag hook subassembly, locking truckle subassembly, the truckle connecting block is fixed in the truckle support frame bottom.

The universal wheel assembly comprises a bearing cover, a rotating block, a supporting shaft, a caster frame, a tensioning block, a pin shaft and casters, wherein the supporting shaft is longitudinally and fixedly connected to the caster frame; the upper side and the lower side of the rotating block are assembled on the supporting shaft through deep groove ball bearings, and a bearing cover is arranged outside the deep groove ball bearings positioned on the upper side; the upper end of the supporting shaft is provided with a locking nut; the hinge part of the rotating block is hinged with the bottom of the caster connecting block through a pin shaft; the caster frame is provided with casters through caster shafts; and a tensioning block is arranged on the caster frame.

The draw hook assembly comprises a handle I, a pull rod I, a right-angle draw hook, a middle shaft, a screw sleeve I and a screw sleeve II, wherein the screw sleeve I is penetrated through a side plate of the caster support frame and then locked through the screw sleeve II; the middle part of the right-angle drag hook is arranged in the trundle support frame through a center shaft; the novel right-angle drag hook is characterized in that the pull rod I is assembled in the screw sleeve I, the handle I is arranged at the outer end of the pull rod I, the inner end of the pull rod I is connected with a through hole at the upper part of a longitudinal arm of the right-angle drag hook, and a reset spring is arranged between the screw sleeve I and the longitudinal arm on the pull rod I.

When the rotating block rotates anticlockwise around the pin shaft to enable the truckle to overturn to the upper side, the tensioning block on the truckle frame is just clamped at the hook end of the cross arm of the right-angle drag hook.

The locking caster assembly includes: the handle II, the rubber pad II, the pull rod II, the support column, the lock tongue, the positioning plate and the U-shaped piece are fixed on the side plate of the caster support frame, and the U-shaped piece is fixedly connected to the positioning plate; the bottom of the U-shaped part is horizontally fixed with a supporting sleeve, the lock tongue is provided with a long round groove in a penetrating mode, the lock tongue is assembled in the supporting sleeve, the supporting sleeve is longitudinally and fixedly provided with a supporting column in a penetrating mode, and the supporting column penetrates through the long round groove of the lock tongue; when the rotating block rotates clockwise around the pin shaft to enable the trundle to turn down, one end of the clamping end of the lock tongue penetrates through the supporting sleeve and stretches into the corresponding clamping groove of the rotating block; the lock tongue is connected with a pull rod II, and the pull rod II penetrates out of the other end of the supporting sleeve and then is connected with a handle II.

Further preferably, a sealing plate is arranged at the other end of the supporting sleeve.

Further preferably, the caster support frame is provided with a groove plate for placing the folded caster.

Further preferably, a rubber pad II is arranged outside the other end of the supporting sleeve, and the rubber pad II is sleeved on the pull rod II.

Further preferably, a rubber pad I is arranged outside the screw sleeve I, and the rubber pad I is sleeved on the pull rod I.

Unlocking of the lowering state of the folding castor mechanism drives the pull rod I to move leftwards through the pulling handle I, so that the right-angle drag hook rotates anticlockwise around the central shaft, the right-angle drag hook is separated from the tensioning block, and the lowering process of the folding castor mechanism is realized. Unlocking in the folding state of the folding caster wheel mechanism drives the pull rod II and the lock tongue to move leftwards through the pulling handle II, so that the lock tongue is separated from the clamping groove of the rotating block, and the universal wheel assembly rotates 195 degrees around the pin shaft to upwards overturn to realize the folding state.

Compared with the prior art, the technical scheme provided by the utility model has the following advantages:

the lowering and retracting actions of the folding caster mechanism are all through pulling the handle.

The folding castor mechanism is used, the castor can be folded when the article is stored in the box, the stability and the reliability of the trolley in the box are not affected, the folding castor is convenient to drop when the trailer is taken out of the box, the trailer is taken out of the box quickly, and the folding castor is a pull handle when the trailer is dropped and folded.

3. Simple structure, the processing degree of difficulty is little, easily batch production.

The utility model has reasonable design and good practical application value.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic view showing a state in which the caster mechanism is retracted.

Fig. 2 is a schematic view showing a lowered state of the folding caster mechanism.

Fig. 3 shows a left side view of fig. 2.

Fig. 4 shows an enlarged view of a portion of the retractor assembly.

Fig. 5 shows a schematic view of the locking foot rest assembly.

In the figure: 1-castor support, 101-groove, 2-castor connecting block, 3-castor component, 301-bearing cap, 302-swivel block, 3020-clamping groove, 303-supporting axle, 304-castor axle, 305-castor frame, 306-tensioning block, 307-pin, 308-castor, 309-deep groove ball bearing, 310-lock nut, 4-drag hook component, 401-handle i, 402-rubber pad i, 403-drag bar i, 404-right angle drag hook, 4040-through hole, 405-central axle, 406-screw sleeve i, 407-screw sleeve ii, 408-return spring, 409-end cap, 410-washer, 5-locking castor component, 501-handle ii, 502-rubber pad ii, 503-drag bar ii, 504-supporting post, 505-lock tongue, 506-locating plate, 507-U-shaped piece, 508-supporting sleeve, 509-oblong groove.

Detailed Description

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be made. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the description, it should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. It should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms described above will be understood by those of ordinary skill in the art as the case may be.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the utility model.

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

A self-locking folding castor mechanism comprises a castor support frame 1, a castor connecting block 2, a universal wheel assembly 3, a draw hook assembly 4 and a locking castor assembly 5. The castor connecting block 2 is fixed at the bottom end of the castor supporting frame 1. The caster support frame is formed by enclosing two caster support risers, a caster support cover plate and a groove plate for placing casters 308.

The universal wheel assembly 3 comprises a bearing cover 301, a rotating block 302, a supporting shaft 303, a castor shaft 304, a castor frame 305, a tensioning block 306, a pin 307 and a castor 308; the supporting shaft 303 is longitudinally and fixedly connected with the pulley frame 305; the upper and lower sides of the rotating block 302 are assembled on the supporting shaft 303 through deep groove ball bearings 309, a bearing cover 301 is arranged outside the deep groove ball bearings 309 positioned on the upper side, and a locking nut 310 is arranged at the upper end of the supporting shaft 303; the hinge part of the rotating block 302 is hinged with the bottom of the caster connecting block 2 through a pin shaft 307; the caster frame 305 is provided with casters 308 through the caster shafts 304; a tensioning block 306 is mounted on the carriage 305.

The draw hook assembly 4 comprises a handle I401, a pull rod I403, a right-angle draw hook 404, a middle shaft 405, a threaded sleeve I406 and a threaded sleeve II 407, wherein the threaded sleeve I406 is penetrated through a side plate of the caster support frame 1 and then locked through the threaded sleeve II 407; namely, the screw sleeve I406 is provided with external threads, after the screw sleeve I406 is penetrated from the outer side of the side plate of the caster support frame 1, the screw sleeve II 407 is provided with internal threads, and the screw sleeve I406 is locked on the side plate of the caster support frame 1 by being assembled on the external threads of the screw sleeve I406 from the internal threads; the middle part of the right-angle drag hook 404 is arranged in the caster support frame 1 through a middle shaft 405; the pull rod I403 is assembled in the swivel I406, the handle I401 is installed to the outer end of pull rod I403, and the inner of pull rod I403 is connected with the upper portion through-hole 4040 of the trailing arm of right angle drag hook 404, is located between swivel I406 and the trailing arm on the pull rod I403 and is equipped with reset spring 408. It should be noted that, the outer diameter of the pull rod i 403 is significantly smaller than the inner diameter of the through hole 4040, and enough space is reserved. In addition, the connection between the inner end of the tie rod i 403 and the through hole 4040 may be in various manners, for example: the end cap 409 is integrally arranged outside the inner end of the pull rod I403, washers 410 are respectively arranged on two sides of the inner end of the pull rod I403, which are positioned at the through holes, and the outside washers 410 are used for preventing the end cap 409 from separating from the through holes 4040 because the outer diameter of the end cap 409 is smaller than the inner diameter of the through holes, and one end of the return spring 408 is positioned in the inner cavity of the screw sleeve I406, and the other end of the return spring is abutted against the inside washers 410. Alternatively, the end cap 409 is not provided outside the inner end of the tie rod i 403, and a nut is screwed thereon, so that the same function as the end cap can be achieved. When the rotating block 302 rotates anticlockwise around the pin shaft 307 to enable the castor 308 to overturn upwards, the tensioning block 306 on the castor frame 305 is just clamped with the cross arm hook end of the right angle draw hook 404.

The locking caster assembly 5 includes: the handle II 501, the rubber pad II 502, the pull rod II 503, the support column 504, the lock tongue 505, the positioning plate 506 and the U-shaped piece 507, wherein the positioning plate 506 is fixed on the side plate of the caster support frame 1, and the U-shaped piece 507 is fixedly connected on the positioning plate 506; the bottom of the U-shaped piece 507 is horizontally fixed with a supporting sleeve 508, a long round groove 509 is arranged on the lock tongue 505 in a penetrating way, and a gap enough for the support column 504 to move is reserved in the long round groove 509 so that the lock tongue 505 can move. The lock tongue 505 is assembled in the supporting sleeve 508, and a sealing plate is arranged at the other end of the supporting sleeve 508. A support column 504 is longitudinally and fixedly arranged on the support sleeve 508, and the support column 504 passes through a long round groove 509 of the lock tongue 505; when the rotating block 302 rotates clockwise around the pin shaft 307 to enable the caster 308 to turn down, one end of the clamping end of the lock tongue 505, which passes through the supporting sleeve 508, extends into the corresponding clamping groove 3020 of the rotating block 302; the lock tongue 505 is connected with the pull rod II 503, and the pull rod II 503 penetrates out of the other end of the supporting sleeve 508 and then is connected with the handle II 501.

Unlocking of the lowering state of the folding castor mechanism drives the pull rod I403 to move leftwards by pulling the handle I401, so that the right-angle draw hook 404 rotates anticlockwise around the center shaft 405, the hook end of the cross arm of the right-angle draw hook 404 is separated from the tensioning block 306, and the lowering process of the folding castor mechanism is realized. In the lowered state, the lock tongue 505 is inserted into the locking groove of the rotating block 302, and the counterclockwise rotation of the universal wheel assembly 3 is restricted. Clockwise, the universal wheel assembly 3 is blocked from rotating by the caster support 1. Unlocking of the folding state of the castor mechanism drives the pull rod II 503 and the lock tongue 505 to move leftwards by pulling the handle II 501, so that the lock tongue 505 is separated from the clamping groove of the rotating block 302, and the universal wheel assembly 3 rotates 195 degrees around the pin shaft 307 to upwards overturn to realize the folding state. In the retracted state, the right-angle drag hook 404 hooks the tensioning block 306, so that the universal wheel assembly 3 is limited to rotate clockwise, and the caster support frame 1 is limited to rotate the caster 308 anticlockwise.

The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Although described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and they should be construed as covering the scope of the appended claims.

Claims (5)

1. A self-locking folding castor mechanism comprises a castor support frame (1), a castor connecting block (2), a universal wheel assembly (3), a draw hook assembly (4) and a locking castor assembly (5);

the method is characterized in that: the trundle connecting block (2) is fixed at the bottom end of the trundle supporting frame (1);

the universal wheel assembly (3) comprises a bearing cover (301), a rotating block (302), a supporting shaft (303), a caster shaft (304), a caster frame (305), a tensioning block (306), a pin shaft (307) and a caster (308); the supporting shaft (303) is longitudinally and fixedly connected with the pulley frame (305); the upper side and the lower side of the rotating block (302) are assembled on the supporting shaft (303) through deep groove ball bearings (309), a bearing cover (301) is arranged outside the deep groove ball bearings (309) positioned on the upper side, and a locking nut (310) is arranged at the upper end of the supporting shaft (303); the hinge part of the rotating block (302) is hinged with the bottom of the caster connecting block (2) through a pin shaft (307); the caster frame (305) is provided with casters (308) through caster shafts (304); a tensioning block (306) is arranged on the caster frame (305);

the draw hook assembly (4) comprises a handle I (401), a pull rod I (403), a right-angle draw hook (404), a middle shaft (405), a screw sleeve I (406) and a screw sleeve II (407), wherein the screw sleeve I (406) is locked through the screw sleeve II (407) after penetrating through a side plate of the caster support frame (1); the middle part of the right-angle drag hook (404) is arranged in the caster support frame (1) through a middle shaft (405); the novel screw rod is characterized in that the pull rod I (403) is assembled in the screw sleeve I (406), a handle I (401) is arranged at the outer end of the pull rod I (403), the inner end of the pull rod I (403) is connected with a through hole (4040) at the upper part of a longitudinal arm of the right-angle drag hook (404), and a reset spring (408) is arranged between the screw sleeve I (406) and the longitudinal arm on the pull rod I (403);

when the rotating block (302) rotates anticlockwise around the pin shaft (307) to enable the trundle (308) to turn over to an upper folding position, the tensioning block (306) on the trundle frame (305) is just clamped at the cross arm hook end of the right-angle drag hook (404);

the locking castor assembly (5) comprises: the novel caster comprises a handle II (501), a pull rod II (503), a support column (504), a lock tongue (505), a positioning plate (506) and a U-shaped piece (507), wherein the positioning plate (506) is fixed on a side plate of a caster support frame (1), and the U-shaped piece (507) is fixedly connected to the positioning plate (506); the bottom of the U-shaped piece (507) is horizontally fixed with a supporting sleeve (508), a long round groove (509) is formed in the lock tongue (505) in a penetrating mode, the lock tongue (505) is assembled in the supporting sleeve (508), a supporting column (504) is longitudinally and fixedly arranged on the supporting sleeve (508) in a penetrating mode, and the supporting column (504) penetrates through the long round groove (509) of the lock tongue (505); when the rotating block (302) rotates clockwise around the pin shaft (307) to enable the caster wheel (308) to turn over to a lower working position, one end of the clamping end of the lock tongue (505) penetrates out of the supporting sleeve (508) and extends into a corresponding clamping groove (3020) of the rotating block (302); the lock tongue (505) is connected with a pull rod II (503), and the pull rod II (503) penetrates out of the other end of the supporting sleeve (508) and then is connected with a handle II (501).

2. A self-locking folding castor mechanism as in claim 1 wherein: the other end of the supporting sleeve (508) is provided with a sealing plate.

3. A self-locking folding castor mechanism as in claim 2 wherein: the other end of the supporting sleeve (508) is externally provided with a rubber pad II (502), and the rubber pad II (502) is sleeved on the pull rod II (503).

4. A self-locking folding castor mechanism as in claim 2 wherein: a rubber pad I (402) is arranged outside the screw sleeve I (406), and the rubber pad I (402) is sleeved on the pull rod I (403).

5. A self-locking folding castor mechanism as in claim 2 wherein: the caster support frame (1) is provided with a groove (101) for placing the folded caster.