CN201970793U

CN201970793U - Caster lifting mechanism

Info

Publication number: CN201970793U
Application number: CN2011200888310U
Authority: CN
Inventors: 李亚伟
Original assignee: NINGBO TAIJIA SAFETY EQUIPMENT CO Ltd
Current assignee: NINGBO TAIJIA SAFETY EQUIPMENT CO Ltd
Priority date: 2011-03-25
Filing date: 2011-03-25
Publication date: 2011-09-14
Anticipated expiration: 2021-03-25

Abstract

The utility model relates to a caster lifting mechanism of a box body, which comprises caster brackets fixed at the bottom of the box body, wherein a caster is arranged in each caster bracket; the caster lifting mechanism is characterized in that a caster seat is further arranged in each caster bracket, the caster is arranged on two sidewalls of the caster seat by a rotary shaft, and the caster seat is limited in the caster bracket and can slide up and down; sliding plates capable of sliding are limited on a lower outer end face of the box body, and an outer end of each sliding plate can be inserted into the caster bracket to be matched with the caster seat; when the outer end of each sliding plate is inserted into the caster bracket and is cushioned between an upper end face of the caster seat and the lower outer end face of the box body, the lower end of the caster is partially exposed out of the lower part of the caster bracket; and when the outer end of each sliding plate is separated from the caster bracket, the caster is completely shrunk into the caster bracket under the action of gravity of the box body. According to the caster lifting mechanism of the box body disclosed by the utility model, the lifting of the casters is realized by the sliding of the sliding plates and the sliding leads the outer ends of the sliding plates to/not to insert into the caster bracket to block up the caster seat, wherein the whole regulating process is convenient, and the structure is simple and is not easy to break.

Description

A kind of castor lifting mechanism

Technical field

The utility model relates to a kind of castor lifting mechanism, can be used for the casing or the casings such as electric refrigerator, laundry machine of coffer.

Background technology

For making things convenient for movables insurance case, refrigerator or furniture, generally can fix four castors in the bottom of suppressed by vector such as coffer, refrigerator or furniture, existing castor all directly is fixed on the bottom of suppressed by vector by foot wheel carrier, so castor can only rotate, and can not stretch up and down, because castor is carried for a long time, very easily damage, casing does not need to move in normal use in addition, because the effect of roller, casing is stressed a little just can be shifted, and is unfavorable for the location, poor stability.

At aforementioned present situation, someone has invented a kind of energy lifting caster wheel structure, as a patent No. is the lifting mechanism of a kind of coffer castor the Chinese utility model patent " lifting mechanism of coffer castor " of ZL03229271.6 (notification number is CN2613569Y) has disclosed, comprise at least two castors, the screw rod that is positioned at safe body and rotates perpendicular to tank floor, be placed in the outer and lifting disk that slide with screw engages of screw rod and at least two respectively around its pivotally supported seesaw in middle part, castor is embedded in bore is slightly less than the tank floor mounting hole of castor diameter, seesaw one end is pressed on the lifting disk, and the other end touches mutually with the castor upper surface.When lifting disk when screw rod rises, raise pressure seesaw one end thereon, and the other end of seesaw pushes castor downwards, casing is risen, castor is exposed to outside the casing and rolls, thus mobile insurance case easily; When lifting disk during to lower slider, seesaw one end descends thereupon in addition, because the deadweight of coffer, castor is hidden in again in the casing, makes the tank floor of coffer directly contact the location with ground, has guaranteed that coffer can not move easily.

Aforementioned Castor structure is under the effect of screw thread transmission, realize the lifting of castor by the swing of seesaw, because the weight of casing strengthens, when the overhanging formula of castor, the pressure that castor is subjected to casing is big, therefore the thread fiting part between screw rod and the lifting disk is long-term stressed easy to wear, thereby causes castor normally not stretch.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of castor lifting mechanism at above-mentioned prior art present situation, and caster wheel can stretch up and down in this castor lifting mechanism, and stretching structure is not fragile.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of castor lifting mechanism, comprise being fixed on tank floor caster wheel support, and a castor is installed in the trundle bracket; It is characterized in that: also be provided with the castor seat in the described trundle bracket, castor is installed in by rotating shaft on the two side of castor seat and can rotates, and described castor seat constrains in the trundle bracket and slippage up and down; Constraint has the slide plate of energy slippage on the following outer face of described casing, and the outer end of this slide plate can be stretched in the described trundle bracket and cooperate with the castor seat; In trundle bracket is inserted in the slide plate outer end and pad be located under the upper surface of castor seat and the casing under the state between the outer face, the end portion of castor exposes outside the below trend of trundle bracket; Break away from the slide plate outer end under the state of trundle bracket, castor is under the casing action of gravity in the described trundle bracket of whole indentation.

Above-mentioned rotating shaft passes the two side of castor seat, has the bar shaped pilot hole of vertical setting on the front and back sidewall of described trundle bracket, and bar shaped pilot hole and slippage are up and down passed in the two ends of described rotating shaft.It utilizes rotating shaft to make the castor seat constrain in the trundle bracket and slippage up and down, and is simple in structure, also can adopt other structure that the castor seat is constrained in the trundle bracket certainly.

Above-mentioned trundle bracket has four and be fixed on four edges of casing, and described slide plate has four, constrain in respectively casing the bottom surface and only can be along the diagonal line slippage.Generally speaking be equipped with four castors on the coffer, coffer is steadily moved.

The following outer face of above-mentioned casing is provided with rotating disk, be provided with handle in the described casing, the bar portion of handle passes the diapire of casing downwards, the bar portion of handle has last polygon bar portion from top to bottom, cylindrical bar portion and following polygon bar portion, the described polygon bar portion of going up is identical with following polygon bar portion profile, have last polygonal hole and following polygonal hole that profile and last polygon bar portion and following polygon bar portion match on the diapire of described casing and the rotating disk, described cylindrical bar portion can be in last polygonal hole and following polygonal hole rotates around self axis, all link to each other between described each slide plate and the rotating disk by torsion spring, a free end that is torsion spring is fixed on the rotating disk, and another free end of torsion spring is fixed on the corresponding slide plate.

Aforementioned structure is convenient to drive each slide plate and is moved, and finishes the lifting of castor, only need by turning handle, and each corner of lifting coffer respectively promptly finishes, and is easy to operate.

Because the outer end of slide plate has pad to establish effect to the upper surface of castor seat, the outer end of above-mentioned each slide plate is fixed with and is located in order to pad the cushion block between the following outer face of the upper surface of described castor seat and casing.Like this slide plate just can correspondingly do thin, the saving in material cost-cutting, simultaneously machining of slide block is also more convenient.

The above-mentioned rotating disk upper edge circle spacing is fixed with four first fixing screws, the inner of described each slide plate is fixed with second fixing screw, all have hook portion on two free ends of described each torsion spring, two hook portions on each torsion spring are colluded respectively and are located on corresponding first fixing screw and second screw.More than be the concrete fixed form of torsion spring and rotating disk and slide plate, this generation mode is easy to operate, also can adopt other fixed form certainly.

At interval have two bar holes on above-mentioned each slide plate, be threaded with the diapire of coffer after having two stop screws to pass corresponding bar hole on the slide plate respectively.

Compared with prior art, advantage of the present utility model is: this structure is passed through moving slide board, whether the outer end of slide plate stretches into the lifting that comes bed hedgehopping castor seat in the trundle bracket and realize castor, when needs are pulled casing, only need to insert the outer end of slide plate in the trundle bracket and pad is located under the upper surface of castor seat and the casing between the outer face, the end portion of castor exposes outside the below of trundle bracket, when normally settling casing, only need make the slide plate outer end break away from trundle bracket, castor is under the casing action of gravity in the described trundle bracket of whole indentation, whole control process is convenient, and simple in structure not fragile.

Description of drawings

Fig. 1 is the positive perspective view (castor decline state) of the utility model embodiment;

Fig. 2 is the back side perspective view (castor decline state) of the utility model embodiment;

Fig. 3 is the perspective view of the utility model embodiment turntable;

Fig. 4 is the perspective view of handle among the utility model embodiment;

Fig. 5 is the perspective view of casing among the utility model embodiment;

Fig. 6 is the structural representation (castor decline state) of the utility model embodiment;

Fig. 7 is that the A-A of Fig. 6 is to echelon sectional view;

Fig. 8 is the structural representation (intermediateness that castor rises) of the utility model embodiment;

Fig. 9 is that the B-B of Fig. 8 is to echelon sectional view;

Figure 10 is the structural representation (castor propradation) of the utility model embodiment;

Figure 11 is that the C-C of Fig. 8 is to echelon sectional view.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Shown in Fig. 1～11, be a preferred embodiment of the present utility model.

A kind of castor lifting mechanism, comprise and be fixed on casing 1 bottom surface caster wheel support 2, trundle bracket 2 has four and be fixed on four edges of casing 1, and each trundle bracket 2 is OBL framed structure, has the bar shaped pilot hole 21 of vertical setting on the front and back sidewall of trundle bracket 2.

All also be provided with castor seat 4 in each trundle bracket 2, hinge seat 4 takes the shape of the letter U, in each hinge seat 4 castor 3 is installed all, castor 3 is installed in by rotating shaft 31 on the two side of castor seat 4 and can rotates, rotating shaft 31 passes the two side of castor seat 4, bar shaped pilot hole 21 and slippage are up and down passed in the two ends of rotating shaft 31, and castor 3 can move up and down by relative together trundle bracket 2 with hinge seat 4;

Constraint has the slide plate 5 of four energy slippages on the following outer face of casing 1, promptly on each slide plate 5, have two bar holes 53 at interval, corresponding bar hole 53 backs that have two stop screws 54 to pass respectively on the slide plate are threaded with the diapire of coffer 1, so each slide plate only can be along the diagonal line slippage; The outer end of each slide plate 5 can be stretched in the described trundle bracket 2 and cooperate with castor seat 4, the outer end of each slide plate 5 is fixed with cushion block 51, in trundle bracket 2 is inserted in slide plate 5 outer ends and allow cushion block 51 fill up to be located under the upper surface and the state between 1 time outer face of casing of castor seat 4, the end portion of castor 3 exposes outside the below of trundle bracket 2; Cushion block 51 in slide plate 5 outer ends breaks away under the state of trundle brackets 2, and castor 3 is under casing 1 action of gravity in the described trundle bracket 2 of whole indentation.

Another utility model point of the present utility model is, also improves a kind of structure that slide plate moves that drives.

The following outer face of casing 1 is provided with rotating disk 6, be provided with handle 7 in the casing 1, the bar portion 71 of handle passes the diapire of casing 1 downwards, the bar portion 71 of handle has last polygon bar portion 711 from top to bottom, cylindrical bar portion 712 and following polygon bar portion 713, last polygon bar portion 711 is identical with following polygon bar portion 713 profiles, have last polygonal hole 11 and following polygonal hole 61 that profile and last polygon bar portion 711 and following polygon bar portion 713 match on the diapire of casing 1 and the rotating disk 6, cylindrical bar portion 712 can be around self axis rotation in last polygonal hole 11 and following polygonal hole 61, all link to each other between each slide plate 5 and the rotating disk 6 by torsion spring 8, a free end that is torsion spring 8 is fixed on the rotating disk 6, and another free end of torsion spring 8 is fixed on the corresponding slide plate 5.

Torsion spring 8 is connected between rotating disk 6 and the slide plate 5 in the following ways: the 6 upper edge circle spacings of rotating disk are fixed with four first fixing screws 62, the inner of each slide plate 5 is fixed with second fixing screw 52, all have hook portion 81 on two free ends of each torsion spring 8, two hook portions 81 on each torsion spring 81 are colluded respectively and are located on corresponding first fixing screw 62 and second screw 52.

Principle of work and the process of the utility model embodiment are as follows:

When needs rise castor: shown in Fig. 8～11, pull-up handle 7, last polygon bar portion 711 on the handle 7 upwards breaks away from last polygonal hole 11 on casing 1 diapire and the following polygonal hole 61 on the rotating disk 6, cylindrical bar portion 712 on the handle 7 enters polygonal hole 11, following polygonal hole 61 on the handle 7 is agreed with following polygonal hole 61 simultaneously, hold

handle

7 and 6 rotations of left-hand revolution 45 degree drive rotating disks, slide plate 5 and cushion block 51 can't be moved by casing gravity, torsion spring 8 is stressed, and promptly torsion spring 8 makes in slide plate 5 maintenances and moves trend; Then keep handle 7 to hold state, press down handle 7 simultaneously, the last polygon bar portion 711 of handle and following polygon bar portion 713 are agreed with the last polygonal hole 11 of bottom half and the following polygonal hole 61 of rotating disk 6, rotating disk can not rotate around self axis like this; Last each corner that upwards promotes casing 1 successively, make on the corresponding corner of casing caster wheel 3 liftoff, the strained condition that breaks away from casing 1 gravity, torsion spring 8 reverses release simultaneously, drives slide plate 5 and cushion block 51 recovery, puts down casing 1, casing 1 recovers horizontality, hinge seat 4 is no longer established by cushion block 51 pads, and rotating shaft 31 drives castor seat 4 and castor 3 rises along bar shaped pilot hole 21 tracks together, is castor 3 rise states.

When needs are fallen castor: shown in Fig. 1,2,6,7, same pull-up handle 7, last polygon bar portion 711 on the handle 7 upwards breaks away from last polygonal hole 11 on casing 1 diapire and the following polygonal hole 61 on the rotating disk 6, cylindrical bar portion 712 on the handle 7 enters polygonal hole 11, following polygonal hole 61 on the handle 7 is agreed with following polygonal hole 61 simultaneously, hold handle 7 clickwises 45 degree and drive rotating disk 6 rotations, slide plate 5 and cushion block 51 can't be moved by casing 1 gravity, torsion spring 8 is oppositely stressed, and promptly torsion spring 8 makes slide plate 5 keep the outer trend of moving; Then keep handle 7 to hold state, press down handle 7 simultaneously, the last polygon bar portion 711 of handle and following polygon bar portion 713 are agreed with the last polygonal hole 11 of bottom half and the following polygonal hole 61 of rotating disk 6, rotating disk can not rotate around self axis like this; Last each corner that upwards promotes casing 1 successively, make on the corresponding corner of casing caster wheel 3 liftoff, the strained condition that breaks away from casing 1 gravity, by gravity rotating shaft 31 drives castor seat 4 and castor 3 descends along bar shaped pilot hole 21 tracks together, torsion spring 8 reverses release simultaneously, it is overhanging to drive slide plate 5 and cushion block 51, in trundle bracket 2 is inserted in slide plate 5 outer ends and allow cushion block 51 fill up to be located between the upper surface and 1 time outer face of casing of castor seat 4, the end portion of castor 3 exposes outside the below of trundle bracket 2.

Claims

1. a castor lifting mechanism comprises being fixed on casing (1) bottom surface caster wheel support (2), and a castor (3) is installed in the trundle bracket (2); It is characterized in that: also be provided with castor seat (4) in the described trundle bracket (2), described castor (3) is installed in by rotating shaft (31) on the two side of castor seat (4) and can rotates, described castor seat (4) constrains in the trundle bracket (2) and slippage up and down, constraint has the slide plate (5) of energy slippage on the following outer face of described casing (1), and the outer end of this slide plate (5) can be stretched in the described trundle bracket (2) and cooperate with castor seat (4); Also pad is located under the upper surface and the state between the following outer face of casing (1) of castor seat (4) in trundle bracket (2) is inserted in slide plate (5) outer end, and the end portion of castor (3) exposes outside the below of trundle bracket (2); Break away from slide plate (5) outer end under the state of trundle bracket (2), castor (3) is under casing (1) action of gravity in the described trundle bracket of whole indentation (2).

2. castor lifting mechanism according to claim 1, it is characterized in that: described rotating shaft (31) passes the two side of castor seat (4), have the bar shaped pilot hole (21) of vertical setting on the front and back sidewall of described trundle bracket (2), described bar shaped pilot hole (21) and slippage are up and down passed in the two ends of described rotating shaft (31).

3. castor lifting mechanism according to claim 1 and 2, it is characterized in that: described trundle bracket (2) has four and be fixed on four edges of casing (1), described slide plate (5) has four, constrain in respectively casing (1) the bottom surface and only can be along the diagonal line slippage.

4. castor lifting mechanism according to claim 3, it is characterized in that: the following outer face of described casing (1) is provided with rotating disk (6), be provided with handle (7) in the described casing (1), the bar portion (71) of handle passes the diapire of casing (1) downwards, the bar portion (71) of handle has last polygon bar portion (711) from top to bottom, cylindrical bar portion (712) and following polygon bar portion (713), the described polygon bar portion (711) of going up is identical with following polygon bar portion (713) profile, have last polygonal hole (11) and following polygonal hole (61) that profile and last polygon bar portion (711) and following polygon bar portion (713) match on the diapire of described casing (1) and the rotating disk (6), described cylindrical bar portion (712) can be around self axis rotation in last polygonal hole (11) and following polygonal hole (61), all link to each other between described each slide plate (5) and the rotating disk (6) by torsion spring (8), a free end that is torsion spring (8) is fixed on the rotating disk (6), and another free end of torsion spring (8) is fixed on the corresponding slide plate (5).

5. castor lifting mechanism according to claim 4 is characterized in that: the outer end of described each slide plate (5) is fixed with and is located in order to pad the cushion block (51) between the following outer face of the upper surface of described castor seat (4) and casing (1).

6. castor lifting mechanism according to claim 4, it is characterized in that: described rotating disk (6) the upper edge circle spacing is fixed with four first fixing screws (62), the inner of described each slide plate (5) is fixed with second fixing screw (52), all have hook portion (81) on two free ends of described each torsion spring (8), two hook portions (81) on each torsion spring (81) are colluded respectively and are located on corresponding first fixing screw (62) and second screw (52).

7. castor lifting mechanism according to claim 1, it is characterized in that: described each slide plate (5) is gone up at interval and is had two bar holes (53), and corresponding bar hole (53) back that has two stop screws (54) to pass respectively on the slide plate is threaded with the diapire of coffer (1).