CN210416085U - Novel central control caster - Google Patents

Abstract

The utility model discloses a novel central control caster, which comprises a connecting rod type control structure, wherein the connecting rod type control structure comprises a linkage group, a rotating body and a clamping group, a vertical mounting hole of a wheel carrier is connected with a mounting shaft in the linkage group through the upper end of the rotating body, and the lower end of the mounting shaft in the linkage group is connected with an upper support in the clamping group through the lower end of the rotating body; the clamping group includes undersetting and upper bracket, constitute shell structure after undersetting and upper bracket link firmly, this shell structure links firmly with the wheel carrier, and wear to be equipped with the pivot on this shell structure and the wheel carrier, the both ends of pivot all link to each other with the gyro wheel through the bearing, last extension board down having set gradually in the shell structure from last, square transmission seat, the fixed block, linkage block and lateral shifting piece, be provided with in the square transmission seat can with the lower fluted disc of last fluted disc looks block on the transfer line, all be formed with the latch on the left surface at both ends around the brake block. The utility model discloses not only bearing capacity is strong, can realize rectilinear brake, dual-brake moreover.

Description

Novel central control caster

Technical Field

The utility model relates to a well accuse truckle, more specifically say, relate to a novel well accuse truckle.

Background

The caster is a common product, and is usually installed at the bottom of furniture, a cart or a lathe, so that the furniture can be flexibly and conveniently moved. Since the device is required to be stationary after the device is moved, a brake device must be provided on the caster. However, the tight brake device in the existing universal wheel only has the function of single brake or brake direction, namely, the wheel is braked, and the wheel does not move horizontally any more but can still rotate along the fixed shaft; the wheel rotation direction is braked, and the wheel can not rotate along the fixed shaft any more but can still move horizontally; that is to say, the function of braking the wheel and braking the direction at the same time does not exist in the same tight braking device.

Disclosure of Invention

1. Technical problem to be solved by the utility model

An object of the utility model is to provide a novel well accuse truckle adopts the technical scheme of the utility model, simple structure, it is convenient to connect, two gyro wheel structures, bearing capacity is strong, and connecting rod formula control structure is compact in addition, and through the square hole looks card's on the square piece on the lower drive rod and the middle extension board mode, the purpose of accomplishing the straight-going brake, through the mode of interior tooth's socket looks block on last fluted disc on the lower drive rod and the square drive seat in lower fluted disc looks block and latch and the gyro wheel, accomplish the purpose of dual brake.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a novel central control caster, including connecting rod formula control structure, wheel carrier and set up in the gyro wheel of wheel carrier both sides, connecting rod formula control structure include interlock group, rotator and clip group, the vertical mounting hole of wheel carrier link with the installation axle in the interlock group through the rotator upper end, the installation axle lower extreme in the interlock group links with the upper bracket in the clip group through the rotator lower extreme; the clamping group comprises a lower support and an upper support, the lower support and the upper support are fixedly connected to form a shell structure, the shell structure is fixedly connected with the wheel carrier, a rotating shaft penetrates through the shell structure and the wheel carrier, two ends of the rotating shaft are connected with the roller through bearings, the roller comprises a wheel cover and a wheel body, a third bearing mounting hole is formed in the middle of the outer side surface of the wheel body in a concave mode, and the wheel cover is fixedly connected with the outer side surface of the wheel body after the bearings are mounted in the third bearing mounting hole in a clamped mode; the inner side surface of the wheel body is recessed inwards to form an annular groove and a main body structure, and a plurality of clamping grooves are uniformly distributed on the outer circumferential surface of the annular groove along the circumferential direction of the annular groove; the shell structure is internally provided with a middle support plate, a square transmission seat, a fixed block, a linkage block and a transverse moving block from top to bottom in sequence, the middle support plate is fixed on the upper surface of the fixed block, and the middle support plate is provided with a square hole; a first placing groove is formed in the upper surface of the fixed block in a concave mode, a square transmission seat capable of moving up and down is arranged in the first placing groove, and a first elastic element is arranged between the bottom of the square transmission seat and the bottom wall of the first placing groove; a second placing groove is formed in the inner concave surface of the upper surface of the square transmission seat, and a lower fluted disc is formed on the bottom wall of the second placing groove; the driving end of the transmission rod in the linkage group can be arranged in the second placing groove in an up-and-down motion manner, and the driving end of the transmission rod sequentially comprises a square block which can be clamped with the square hole, an upper fluted disc which can be clamped with the lower fluted disc and a cylindrical section which can be slidably connected with the through hole on the bottom wall of the second placing groove from top to bottom; a first movable groove allowing the linkage block to rotate is formed in the lower surface of the fixed block in a concave mode; the upper end of the linkage block is positioned in the first movable groove, the upper end of the linkage block is abutted against the cylindrical section, and two ends of a movable shaft on the linkage block are respectively arranged in first vertical sliding grooves formed on the front inner side wall and the rear inner side wall of the first movable groove; the lower end of the linkage block is arranged in a second movable groove formed on the right side surface of the transverse moving block, and the lower end of the linkage block is connected with the transverse moving block through a pivot; torsion springs are arranged on the pivot and positioned on two sides of the linkage block, one end of each torsion spring abuts against the bottom wall of the second movable groove, and the other end of each torsion spring abuts against the linkage block; the lower surface of the transverse moving block is connected with the lower support plate of the lower support through a sliding block and sliding groove mechanism; the transverse moving block is provided with a waist-shaped hole which can move left and right relative to the wheel shaft; a third movable groove is concavely arranged on the lower surface of the transverse moving block, a left side plate of the lower support extends into the third movable groove, and a second elastic element is arranged between the left side plate of the lower support and the right side wall of the third movable groove; the left end of the transverse moving block is provided with a brake block mounting groove for mounting a brake block, the front and back directions of the brake block are penetrated in the brake block mounting groove, and the brake block is fixedly connected with the transverse moving block; the tip of brake block pass and stretch into in the annular groove behind the activity window that forms on the wheel carrier curb plate, all be formed with the latch that is used for braking the gyro wheel that can block with above-mentioned draw-in groove looks block on the left surface at both ends around the brake block.

Furthermore, arc-shaped limiting plates which can be abutted against the outer side face of the main structure formed on the inner side face of the wheel body after penetrating through the second vertical sliding grooves and the movable window are formed on the front side face and the rear side face of the right end of the transverse moving block, anti-skid grains are arranged on the inner side face of each arc-shaped limiting plate, and the second vertical sliding grooves are formed in the side plates of the upper support.

Furthermore, the front and rear outer side surfaces of the square transmission seat are respectively provided with a first sliding block, and the front and rear inner side surfaces of the first placing groove are respectively provided with a third vertical sliding groove which is in sliding connection with the first sliding block.

Furthermore, the sliding block and sliding groove mechanism comprises a second sliding block formed on the lower surface of the transverse moving block and a transverse sliding groove formed on a lower support plate of the lower support, and the second sliding block is connected with the transverse sliding groove in a sliding mode.

Furthermore, the linkage group comprises an installation shaft, a bushing, a cam, a hexagonal head and a transmission rod, wherein the lower end of the bushing is fixedly connected with a bearing cover, and the bearing cover is fixedly clamped with a pattern plate fixedly arranged on the installation shaft; a cam mounting groove, a hexagonal head mounting hole and a mounting shaft mounting hole are sequentially arranged in the bushing from top to bottom, the cam is mounted in the cam mounting groove, and a rotation limiting groove at the upper part of the cam is matched with a limiting block formed at the top of the cam mounting groove; the gear switching contour at the lower part of the cam is always abutted against the upper end of the hexagonal head, wherein the gear switching contour is composed of a neutral groove, a direct brake groove and a double brake bulge, and the direct brake groove and the double brake bulge are positioned on two sides of the neutral groove; the hexagonal head can be arranged in the hexagonal head mounting hole in a vertically movable manner; a mounting shaft is fixedly mounted in the mounting shaft mounting hole, and a third elastic element is arranged between the top end of the mounting shaft and the bottom of the hexagonal head; a transmission rod is arranged in the mounting shaft in a manner of sliding up and down and not rotating relatively; the transmission rod comprises an upper transmission rod and a lower transmission rod, and the upper transmission rod and the lower transmission rod are fixedly connected to form a whole transmission rod; the upper end of the upper transmission rod is in threaded connection with the hexagonal head, the prism at the upper end of the lower transmission rod is matched with a prism hole formed in the mounting shaft, and the lower end of the lower transmission rod is a driving end used for driving the clamping group to work.

Furthermore, the rotating body comprises a bearing sleeve, a first bearing mounting hole is formed at the upper end of the bearing sleeve, and an upper bearing sleeved on the mounting shaft is arranged in the first bearing mounting hole; the lower extreme of bearing housing pass the upper cover of upper bracket, the lower extreme of bearing housing is formed with the second bearing mounting hole, is provided with the suit in the second bearing mounting hole and installs epaxial lower bearing, this lower bearing is blocked by the retaining ring that sets firmly on the installation axle.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following beneficial effect:

(1) the utility model relates to a novel central control caster which has simple structure and convenient connection, uses a connecting rod type control structure to control the brake of a roller, controls a lower transmission rod to move upwards when the roller needs to be braked directly, the straight brake is completed when the square block on the lower transmission rod is blocked with the square hole on the middle support plate, the lower transmission rod is controlled to move downwards when the double brake is needed, the first brake is completed when the upper fluted disc on the lower transmission rod is engaged with the lower fluted disc in the square transmission seat, the lower transmission rod is continuously controlled to move downwards, so that the cylindrical section on the lower transmission rod pushes the linkage block to move downwards along the first vertical chute, the linkage block is hinged with the transverse moving block, so that the transverse moving block is pushed to move leftwards, the second elastic element is compressed, the lower transmission rod is continuously controlled to move downwards until the brake block on the transverse moving block is clamped with the roller wheel, and a second brake is finished;

(2) the utility model discloses a novel central control caster, its support and upper bracket constitute the shell structure after linking firmly, this shell structure links firmly with the wheel carrier, and this shell structure and wheel carrier wear to be equipped with the pivot, the both ends of pivot all link to each other with the gyro wheel through the bearing, simple structure, it is convenient to connect, the double-roller structure, bearing capacity is strong;

(3) the utility model discloses a novel central control truckle, the right-hand member front and back both sides face of its lateral shifting block all is formed with the arc limiting plate that can offset with the major structure lateral surface that forms on the wheel body medial surface after passing second vertical spout and movable window, be provided with anti-skidding line on the medial surface of this arc limiting plate, wherein second vertical spout is seted up on the curb plate of upper bracket, simple structure, it is convenient to connect, when needing double-brake the arc limiting plate on the lateral shifting block acts on the gyro wheel when brake block and gyro wheel block mutually, make the brake more steady;

(4) the utility model discloses a novel central control truckle, connect through slider spout mechanism between the lower surface of its lateral shifting piece and the lower extension plate of undersetting, slider spout mechanism includes the second sliding block that forms on the lower surface of lateral shifting piece and the lateral sliding groove that forms on the lower extension plate of undersetting, and the second sliding block is connected with the lateral sliding groove is slided, and slider spout mechanism simple structure, it is convenient to connect, makes the lateral shifting piece more reliable in the effect of slider spout mechanism to move;

(5) the utility model discloses a novel well accuse truckle, two lateral surfaces all are formed with first sliding block around its square transmission seat, are formed with the vertical spout of third with above-mentioned first sliding block sliding connection on two medial surfaces around the first standing groove, simple structure, and it is convenient to connect for square transmission seat is more reliable with fixed block relative motion.

Drawings

Fig. 1 is an exploded view of a novel central control caster of the present invention;

fig. 2 is a connection relation diagram of a connecting rod type control structure and a roller in a novel central control caster of the present invention;

fig. 3 is a schematic structural view of a cam in a novel central control caster of the present invention;

fig. 4 is a schematic structural view of a square transmission seat in a novel central control caster of the present invention;

fig. 5 is a top three-dimensional view of a fixing block of the novel central control caster of the present invention; fig. 6 is a bottom three-dimensional view of the fixing block of the novel central control caster of the present invention;

fig. 7 is a top three-dimensional view of the lateral moving block in the novel central control caster of the present invention;

fig. 8 is a connection relation diagram of the lateral moving block and the linkage block in the novel central control caster of the present invention;

fig. 9 is a bottom three-dimensional view of the lateral moving block in the novel central control caster of the present invention;

fig. 10 is a schematic structural view of a lower support in a novel central control caster of the present invention;

fig. 11 is a schematic structural view of an upper support in a novel central control caster of the present invention;

fig. 12 is an exploded view of a roller of the novel central control caster of the present invention;

fig. 13 is a schematic structural view of a lower transmission rod of a novel central control caster of the present invention;

fig. 14 is a schematic diagram of a brake block in a novel central control caster of the present invention.

The reference numerals in the schematic drawings illustrate: 1-1, installing a shaft; 1-2, a bushing; 1-2-1 and a limiting block; 1-3, a cam; 1-3-1, rotating a limit groove; 1-3-2, a neutral groove; 1-3-3, a direct braking groove; 1-3-4, double-brake bulge; 1-4, six square heads; 1-5, a lower transmission rod; 1-5-1, square blocks; 1-5-2, an upper fluted disc; 1-5-3, cylindrical section; 1-6, a third elastic element; 1-7, an upper transmission rod; 1-8, bearing cover; 1-9, pattern plate; 2-1, wheel cover; 2-2, a wheel body; 2-2-1, an annular groove; 2-2-2, main structure; 2-2-3, a clamping groove; 3-1, bearing sleeves; 3-2, an upper bearing; 3-3, a lower bearing; 3-4, a check ring; 4-1, a lower support; 4-1-1, a transverse chute; 4-2, an upper support; 4-2-1 and a second vertical chute; 4-3, a middle plate; 4-4, a square transmission seat; 4-4-1 and a second placing groove; 4-4-2, a lower fluted disc; 4-4-3, a first slider; 4-5, fixing blocks; 4-5-1, a first placing groove; 4-5-2, a third vertical chute; 4-5-3, a first vertical chute; 4-5-4, a first movable groove; 4-6, a linkage block; 4-7, a lateral moving block; 4-7-1 and a second movable groove; 4-7-2, a waist-shaped hole; 4-7-3, a third movable groove; 4-7-4; an arc limiting plate; 4-7-5, a second slider; 4-8, a second elastic element; 4-9, brake blocks; 4-9-1, latch; 4-10, a first elastic element; 4-11, torsion spring; 5. a rotating shaft; 6. a wheel carrier; 6-1 and a movable window.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Examples

With reference to fig. 1, fig. 2, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 9, fig. 10, fig. 11, fig. 12, and fig. 14, the novel central control caster of the present embodiment includes a link-type control structure, a wheel carrier 6, and rollers disposed on two sides of the wheel carrier 6, the link-type control structure includes a linkage set, a rotating body, and a detent set, and the wheel carrier 6 is formed by assembling a front half wheel carrier and a rear half wheel carrier; the vertical mounting hole of the wheel carrier 6 is connected with the mounting shaft 1-1 in the linkage group through the upper end of the rotating body, and the lower end of the mounting shaft 1-1 in the linkage group is connected with the upper support 4-2 in the clamping group through the lower end of the rotating body; the clamping set comprises a lower support 4-1 and an upper support 4-2, the lower support 4-1 and the upper support 4-2 are fixedly connected to form a shell structure, the shell structure is fixedly connected with a wheel carrier 6, a rotating shaft 5 penetrates through the shell structure and the wheel carrier 6, and two ends of the rotating shaft 5 are connected with the rollers through bearings, so that the clamping set is simple in structure, convenient to connect, double-roller structure and high in bearing capacity; the roller comprises a roller cover 2-1 and a roller body 2-2, a third bearing mounting hole is formed in the middle position of the outer side surface of the roller body 2-2 in a concave mode, the bearing is mounted in the third bearing mounting hole, and the roller cover 2-1 is fixedly connected with the outer side surface of the roller body 2-2 in a clamping mode; an annular groove 2-2-1 and a main body structure 2-2-2 are formed in the inner side surface of the wheel body 2-2 in a concave mode, and a plurality of clamping grooves 2-2-3 are uniformly distributed on the outer circumferential surface of the annular groove 2-2-1 along the circumferential direction; the shell structure is internally provided with a middle support plate 4-3, a square transmission seat 4-4, a fixed block 4-5, a linkage block 4-6 and a transverse moving block 4-7 in sequence from top to bottom, the middle support plate 4-3 is fixed on the upper surface of the fixed block 4-5, and the middle support plate 4-3 is provided with a square hole; a first placing groove 4-5-1 is formed in the upper surface of the fixed block 4-5 in a concave mode, a square transmission seat 4-4 capable of moving up and down is arranged in the first placing groove 4-5-1, and a first elastic element 4-10 is arranged between the bottom of the square transmission seat 4-4 and the bottom wall of the first placing groove 4-5-1; the front outer side surface and the rear outer side surface of the square transmission seat 4-4 are respectively provided with a first sliding block 4-4-3, and the front inner side surface and the rear inner side surface of the first placing groove 4-5-1 are respectively provided with a third vertical sliding groove 4-5-2 which is in sliding connection with the first sliding block 4-4-3, so that the structure is simple, the connection is convenient, and the relative movement of the square transmission seat and the fixed block is more stable; a second placing groove 4-4-1 is formed in the upper surface of the square transmission seat 4-4 in a concave manner, and a lower fluted disc 4-4-2 is formed on the bottom wall of the second placing groove 4-4-1; the driving end of the transmission rod in the linkage group can be arranged in the second placing groove 4-4-1 in an up-and-down motion manner, and the driving end of the transmission rod sequentially comprises a square block 1-5-1 which can be clamped with the square hole, an upper fluted disc 1-5-2 which can be clamped with the lower fluted disc 4-4-2 and a cylindrical section 1-5-3 which can be slidably connected with a through hole on the bottom wall of the second placing groove 4-4-1 from top to bottom; a first movable groove 4-5-4 allowing the linkage block to rotate is formed in the inner concave surface of the lower surface of the fixed block 4-5; the upper end of a linkage block 4-6 is positioned in a first movable groove 4-5-4, the upper end of the linkage block 4-6 is abutted against the cylindrical section 1-5-3, and two ends of a movable shaft on the linkage block 4-6 are respectively arranged in first vertical sliding grooves 4-5-3 formed on the front inner side wall and the rear inner side wall of the first movable groove 4-5-4; the lower end of the linkage block 4-6 is arranged in a second movable groove 4-7-1 formed on the right side surface of the transverse moving block 4-7, and the lower end of the linkage block 4-6 is connected with the transverse moving block 4-7 through a pivot; torsion springs 4-11 are arranged on the pivot and positioned at two sides of the linkage block 4-6, one end of each torsion spring 4-11 is propped against the bottom wall of the second movable groove 4-7-1, and the other end of each torsion spring 4-11 is propped against the linkage block 4-6; the lower surface of the transverse moving block 4-7 is connected with the lower support plate of the lower support 4-1 through a sliding block and sliding groove mechanism, the sliding block and sliding groove mechanism comprises a second sliding block formed on the lower surface of the transverse moving block 4-7 and a transverse sliding groove 4-1-1 formed on the lower support plate of the lower support 4-1, the second sliding block is in sliding connection with the transverse sliding groove 4-1-1, and the sliding block and sliding groove mechanism is simple in structure and convenient to connect, so that the transverse moving block can move more stably under the action of the sliding block and sliding groove mechanism; a waist-shaped hole 4-7-2 which can move left and right relative to the wheel shaft is arranged on the transverse moving block 4-7; a third movable groove 4-7-3 is concavely arranged on the lower surface of the transverse moving block 4-7, a left side plate of the lower support 4-1 extends into the third movable groove 4-7-3, and a second elastic element 4-8 is arranged between the left side plate of the lower support 4-1 and the right side wall of the third movable groove 4-7-3; the left end of the transverse moving block 4-7 is provided with a brake block mounting groove 4-7-6 for mounting a brake block 4-9, the front and back directions of the brake block 4-9 are penetrated in the brake block mounting groove, and the brake block 4-9 is fixedly connected with the transverse moving block 4-7; the end part of the brake block 4-9 passes through a movable window 6-1 formed on the side plate of the wheel carrier and then extends into the annular groove 2-2-1, and the left side surfaces of the front end and the rear end of the brake block 4-9 are respectively provided with a latch 4-9-1 which can be clamped with the clamping groove 2-2-3 and is used for braking the roller; the structure is simple, the connection is convenient, the connecting rod type control structure is used for brake control of the roller, the lower transmission rod is controlled to move upwards when direct braking is needed, the direct braking is completed when the square block on the lower transmission rod is clamped with the square hole on the middle support plate, the lower transmission rod is controlled to move downwards when double braking is needed, the first braking is completed when the upper fluted disc on the lower transmission rod is clamped with the lower fluted disc in the square transmission seat, the lower transmission rod is continuously controlled to move downwards, so that the cylindrical section on the lower transmission rod pushes the linkage block to move downwards along the first vertical chute, the transverse moving block is pushed to move leftwards due to the hinged connection of the linkage block and the transverse moving block, the second elastic element is compressed, and the lower transmission rod is continuously controlled to move downwards until the brake block on the transverse moving block is clamped with the roller, and the second braking; in the embodiment, the front side surface and the rear side surface of the right end of the transverse moving block 4-7 are respectively provided with an arc-shaped limiting plate 4-7-4 which passes through the second vertical sliding groove 4-2-1 and the movable window 6-1 and can be abutted against the outer side surface of the main body structure formed on the inner side surface of the wheel body, the inner side surface of the arc-shaped limiting plate 4-7-4 is provided with anti-skid grains, the second vertical sliding groove 4-2-1 is arranged on the side plate of the upper support 4-2, the structure is simple, the connection is convenient, when double braking is needed, the brake block is clamped with the roller wheel, and meanwhile, the arc-shaped limiting plate on the transverse moving block acts on the;

continuing with FIG. 2 and combining with FIG. 3, and FIG. 13, the linkage group includes an installation shaft 1-1, a bushing 1-2, a cam 1-3, a hexagonal head 1-4 and a transmission rod, the lower end of the bushing 1-2 is fixedly connected with a bearing cap 1-8, and the bearing cap 1-8 is fixedly clamped with a flower plate 1-9 fixedly arranged on the installation shaft 1-1; a cam mounting groove, a hexagonal head mounting hole and a mounting shaft mounting hole are sequentially arranged in the bushing 1-2 from top to bottom, the cam 1-3 is mounted in the cam mounting groove, and a rotation limiting groove 1-3-1 at the upper part of the cam 1-3 is matched with a limiting block 1-2-1 formed at the top of the cam mounting groove; the gear switching contour at the lower part of the cam 1-3 is always abutted against the upper end of the hexagonal head 1-4, wherein the gear switching contour is composed of a neutral groove 1-3-2, a direct brake groove 1-3-3 and a double brake bulge 1-3-4 which are positioned at two sides of the neutral groove 1-3-2; the hexagonal heads 1-4 can be arranged in the hexagonal head mounting holes in a vertically movable manner; a mounting shaft 1-1 is fixedly mounted in the mounting hole of the mounting shaft, and a third elastic element 1-6 is arranged between the top end of the mounting shaft 1-1 and the bottom of the hexagonal head 1-4; a transmission rod is arranged in the mounting shaft 1-1 in a manner of sliding up and down and not rotating relatively; the transmission rod comprises an upper transmission rod 1-7 and a lower transmission rod 1-5, and the upper transmission rod 1-7 and the lower transmission rod 1-5 are fixedly connected to form a whole transmission rod; the upper end of the upper transmission rod 1-7 is in threaded connection with the hexagonal head 1-4, the prism at the upper end of the lower transmission rod 1-5 is matched with a prism hole formed in the mounting shaft 1-1, and the lower end of the lower transmission rod 1-5 is a driving end used for driving the clamping set to work.

Continuing to fig. 2, the rotating body comprises a bearing sleeve 3-1, a first bearing mounting hole is formed at the upper end of the bearing sleeve 3-1, and an upper bearing 3-2 sleeved on the mounting shaft 1-1 is arranged in the first bearing mounting hole; the lower end of the bearing sleeve 3-1 penetrates through the upper cover of the upper support 4-2, a second bearing mounting hole is formed at the lower end of the bearing sleeve 3-1, a lower bearing 3-3 sleeved on the mounting shaft 1-1 is arranged in the second bearing mounting hole, and the lower bearing 3-3 is blocked by a retaining ring 3-4 fixedly arranged on the mounting shaft 1-1.

In an initial state, the upper end of the hexagonal head abuts against the neutral groove under the action of the second elastic element, the driving end of the lower transmission rod is positioned in the second placing groove, the cylindrical section of the lower transmission rod abuts against the upper end of the linkage block, and the brake block is not in contact with the roller at the moment; when the direct brake is needed, the cam is rotated to enable the upper end of the hexagonal head to move towards the direct brake groove, the upper end of the hexagonal head is always abutted against the gear switching profile of the cam, the hexagonal head moves upwards under the action of the third elastic element to drive the lower transmission rod to move upwards, the cam is continuously rotated until the rotation limiting groove is abutted against the limiting block, the upper end of the hexagonal head is abutted against the lowest point of the direct brake groove, the square block is positioned in the square hole, the upper fluted disc is abutted against the middle plate, the wheel carrier and the mounting shaft cannot rotate relatively, and the direct brake is completed; when double braking is needed, the rotating cam enables the upper end of the hexagonal head to move towards the double braking bulge, the upper end of the hexagonal head is always abutted to the gear switching profile of the cam, the second elastic element compresses, the hexagonal head moves downwards, the lower transmission rod is further driven to move downwards, the upper fluted disc and the lower fluted disc are further enabled to be clamped by the rotating cam, the first braking, namely straight braking, is completed at the moment, the rotating cam enables the cylindrical section on the lower transmission rod to push the linkage block to move downwards along the first vertical sliding groove, the linkage block is hinged with the transverse moving block, the transverse moving block is pushed to move leftwards, the second elastic element compresses, the lower transmission rod is controlled to move downwards until the brake block on the transverse moving block is clamped with the roller wheel, and the second braking, namely the roller wheel braking, is completed.

The utility model discloses a novel well accuse truckle, simple structure, it is convenient to connect, through the square piece on the lower transfer line and the mode of the quad slit looks card on the middle extension board, accomplishes the purpose of straight-going brake, through the mode of the interior tooth's socket looks block on last fluted disc on the lower transfer line and the square transmission seat in lower fluted disc looks block and latch and the gyro wheel, accomplishes the purpose of dual brake.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (6)

1. A novel central control caster wheel is characterized in that: the device comprises a connecting rod type control structure, a wheel carrier (6) and rollers arranged on two sides of the wheel carrier (6), wherein the wheel carrier (6) is formed by assembling a front half wheel carrier and a rear half wheel carrier; the connecting rod type control structure comprises a linkage group, a rotating body and a clamping group, wherein a vertical mounting hole of the wheel carrier (6) is connected with a mounting shaft (1-1) in the linkage group through the upper end of the rotating body, and the lower end of the mounting shaft (1-1) in the linkage group is connected with an upper support (4-2) in the clamping group through the lower end of the rotating body; the clamping set comprises a lower support (4-1) and an upper support (4-2), the lower support (4-1) and the upper support (4-2) are fixedly connected to form a shell structure, the shell structure is fixedly connected with a wheel carrier (6), a rotating shaft (5) penetrates through the shell structure and the wheel carrier (6), two ends of the rotating shaft (5) are connected with rollers through bearings, each roller comprises a wheel cover (2-1) and a wheel body (2-2), a third bearing mounting hole is formed in the middle position of the outer side surface of the wheel body (2-2) in an inwards concave mode, and the bearings are mounted on the third bearing mounting hole, and the wheel cover (2-1) is fixedly connected with the outer side surface of the wheel body (2-2) in a clamping mode; an annular groove (2-2-1) and a main body structure (2-2-2) are formed in the inner side surface of the wheel body (2-2) in a concave mode, and a plurality of clamping grooves (2-2-3) are uniformly distributed on the outer circumferential surface of the annular groove (2-2-1) along the circumferential direction of the annular groove; the shell structure is internally and sequentially provided with a middle support plate (4-3), a square transmission seat (4-4), a fixed block (4-5), a linkage block (4-6) and a transverse moving block (4-7) from top to bottom, the middle support plate (4-3) is fixed on the upper surface of the fixed block (4-5), and the middle support plate (4-3) is provided with a square hole; a first placing groove (4-5-1) is formed in the upper surface of the fixing block (4-5) in a concave mode, a square transmission seat (4-4) capable of moving up and down is arranged in the first placing groove (4-5-1), and a first elastic element (4-10) is arranged between the bottom of the square transmission seat (4-4) and the bottom wall of the first placing groove (4-5-1); a second placing groove (4-4-1) is formed in the upper surface of the square transmission seat (4-4) in a concave mode, and a lower fluted disc (4-4-2) is formed on the bottom wall of the second placing groove (4-4-1); the driving end of the transmission rod in the linkage group can be arranged in the second placing groove (4-4-1) in a vertically movable manner, and sequentially comprises a square block (1-5-1) which can be clamped with the square hole, an upper fluted disc (1-5-2) which can be clamped with the lower fluted disc (4-4-2) and a cylindrical section (1-5-3) which can be slidably connected with a through hole in the bottom wall of the second placing groove (4-4-1) from top to bottom; a first movable groove (4-5-4) allowing the linkage block to rotate is formed in the inner concave surface of the lower surface of the fixed block (4-5); the upper end of the linkage block (4-6) is positioned in the first movable groove (4-5-4), the upper end of the linkage block (4-6) is abutted against the cylindrical section (1-5-3), and two ends of a movable shaft on the linkage block (4-6) are respectively arranged in first vertical sliding grooves (4-5-3) formed on the front inner side wall and the rear inner side wall of the first movable groove (4-5-4); the lower end of the linkage block (4-6) is arranged in a second movable groove (4-7-1) formed on the right side surface of the transverse moving block (4-7), and the lower end of the linkage block (4-6) is connected with the transverse moving block (4-7) through a pivot; torsion springs (4-11) are arranged on the pivot and on two sides of the linkage block (4-6), one end of each torsion spring (4-11) abuts against the bottom wall of the second movable groove (4-7-1), and the other end of each torsion spring (4-11) abuts against the linkage block (4-6); the lower surface of the transverse moving block (4-7) is connected with the lower support plate of the lower support (4-1) through a sliding block and sliding groove mechanism; the transverse moving block (4-7) is provided with a waist-shaped hole (4-7-2) which can move left and right relative to the wheel axle; a third movable groove (4-7-3) is concavely arranged on the lower surface of the transverse moving block (4-7), the left side plate of the lower support (4-1) extends into the third movable groove (4-7-3), and a second elastic element (4-8) is arranged between the left side plate of the lower support (4-1) and the right side wall of the third movable groove (4-7-3); the left end of the transverse moving block (4-7) is provided with a brake block mounting groove (4-7-6) for mounting a brake block (4-9), the brake block (4-9) penetrates through the brake block mounting groove in the front-back direction, and the brake block (4-9) is fixedly connected with the transverse moving block (4-7); the end parts of the brake blocks (4-9) penetrate through movable windows (6-1) formed on the side plates of the wheel carrier and then extend into the annular grooves (2-2-1), and clamping teeth (4-9-1) which can be clamped with the clamping grooves (2-2-3) and are used for braking the roller are formed on the left side surfaces of the front end and the rear end of each brake block (4-9).

2. The novel central control caster wheel as claimed in claim 1, wherein: arc-shaped limiting plates (4-7-4) which penetrate through second vertical sliding grooves (4-2-1) and movable windows (6-1) and can be abutted against the outer side face of a main body structure formed on the inner side face of the wheel body are formed on the front side face and the rear side face of the right end of the transverse moving block (4-7), anti-skidding lines are arranged on the inner side face of each arc-shaped limiting plate (4-7-4), and the second vertical sliding grooves (4-2-1) are formed in the side plates of the upper support (4-2).

3. The novel central control caster wheel as claimed in claim 2, wherein: first sliding blocks (4-4-3) are formed on the front outer side face and the rear outer side face of the square transmission seat (4-4), and third vertical sliding grooves (4-5-2) which are in sliding connection with the first sliding blocks (4-4-3) are formed on the front inner side face and the rear inner side face of the first placing groove (4-5-1).

4. The novel central control caster wheel as claimed in claim 3, wherein: the sliding block and sliding groove mechanism comprises a second sliding block formed on the lower surface of the transverse moving block (4-7) and a transverse sliding groove (4-1-1) formed on a lower support plate of the lower support (4-1), and the second sliding block is connected with the transverse sliding groove (4-1-1) in a sliding mode.

5. The novel central control caster wheel of claim 4, wherein: the linkage group comprises an installation shaft (1-1), a bushing (1-2), a cam (1-3), a hexagonal head (1-4) and a transmission rod, wherein the lower end of the bushing (1-2) is fixedly connected with a bearing cover (1-8), and the bearing cover (1-8) is fixedly clamped with a pattern plate (1-9) fixedly arranged on the installation shaft (1-1); a cam mounting groove, a hexagonal head mounting hole and a mounting shaft mounting hole are sequentially arranged in the bushing (1-2) from top to bottom, the cam (1-3) is mounted in the cam mounting groove, and a rotary limiting groove (1-3-1) at the upper part of the cam (1-3) is matched with a limiting block (1-2-1) formed at the top of the cam mounting groove; the gear switching contour at the lower part of the cam (1-3) is always abutted against the upper end of the hexagonal head (1-4), wherein the gear switching contour is composed of a neutral groove (1-3-2), a direct brake groove (1-3-3) and a double brake bulge (1-3-4), and the direct brake groove is positioned on two sides of the neutral groove (1-3-2); the hexagonal heads (1-4) can be arranged in the hexagonal head mounting holes in a vertically movable manner; a mounting shaft (1-1) is fixedly mounted in the mounting shaft mounting hole, and a third elastic element (1-6) is arranged between the top end of the mounting shaft (1-1) and the bottom of the hexagonal head (1-4); a transmission rod is arranged in the mounting shaft (1-1) in a manner of sliding up and down and not rotating relatively; the transmission rod comprises an upper transmission rod (1-7) and a lower transmission rod (1-5), and the upper transmission rod (1-7) and the lower transmission rod (1-5) are fixedly connected to form a whole transmission rod; the upper end of the upper transmission rod (1-7) is in threaded connection with the hexagonal head (1-4), the prism at the upper end of the lower transmission rod (1-5) is matched with the prism hole formed in the mounting shaft (1-1), and the lower end of the lower transmission rod (1-5) is a driving end used for driving the clamping unit to work.

6. The novel central control caster wheel as claimed in claim 5, wherein: the rotating body comprises a bearing sleeve (3-1), a first bearing mounting hole is formed at the upper end of the bearing sleeve (3-1), and an upper bearing (3-2) sleeved on the mounting shaft (1-1) is arranged in the first bearing mounting hole; the lower end of the bearing sleeve (3-1) penetrates through the upper cover of the upper support (4-2), a second bearing mounting hole is formed in the lower end of the bearing sleeve (3-1), a lower bearing (3-3) sleeved on the mounting shaft (1-1) is arranged in the second bearing mounting hole, and the lower bearing (3-3) is blocked by a check ring (3-4) fixedly arranged on the mounting shaft (1-1).

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