CN112389132A

CN112389132A - Gravity caster

Info

Publication number: CN112389132A
Application number: CN202011282596.0A
Authority: CN
Inventors: 李妍
Original assignee: Hangzhou Gravity Caster Technology Co ltd
Current assignee: Hangzhou Gravity Caster Technology Co ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-02-23
Anticipated expiration: 2040-11-17
Also published as: CN112389132B

Abstract

The invention discloses a gravity caster, and aims to provide a gravity caster which can not slide on a brake on a slope road surface, has an obvious damping effect and can smoothly run. Including support, truckle axle and truckle, the truckle cup joints on the truckle axle, and the support is connected with the truckle hub, and the support medial surface is provided with brake equipment, and the truckle includes wheel hub and truckle body, and the wheel hub terminal surface be provided with brake equipment assorted braked wheel, and the truckle body is provided with connecting device, truckle piece and controlling means, connecting device one end and wheel hub elastic connection, the connecting device other end and truckle piece sliding connection, controlling means inlays inside connecting device, and controlling means is connected with brake equipment. The invention has the beneficial effects that: when the gravity caster wheel is parked on a slope road surface, the vehicle does not slide after being braked, the shock absorption effect is good when the caster wheel passes through an irregular road surface, and the running is smooth.

Description

Gravity caster

Technical Field

The invention relates to the related technical field of casters, in particular to a gravity caster.

Background

The truckles are widely applied in production, and can help people to move objects conveniently. In the conventional caster structure, the caster brake can only lock the caster to stop rotating. When going uphill or downhill, the trolley on the uphill or downhill cannot be well stopped by simply locking the caster wheels, and the phenomenon of sliding can occur. The current truckle makes the truckle have the shock attenuation effect through increasing elastic damping mechanism between support and connecting plate, and the structure is complicated, has occupied the space around the support simultaneously, and there is damping mechanism and object collision or the angle of turning to cause the difficulty of traveling inadequately when the truckle traveles or turns.

Disclosure of Invention

The gravity caster wheel overcomes the defects that the caster wheel can slide when braking on a slope road surface and the damping caster wheel structure causes difficulty in driving in the prior art, and has the advantages of no sliding during braking on the slope road surface, obvious damping effect and smooth driving.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a gravity trundle, includes support, truckle axle and truckle, the truckle cup joints on the truckle axle, the support is connected with the truckle axle, the support medial surface is provided with brake equipment, the truckle includes wheel hub and truckle body, the wheel hub terminal surface be provided with brake equipment assorted braked wheel, the truckle body is provided with connecting device, truckle piece and controlling means, connecting device one end and wheel hub elastic connection, the connecting device other end and truckle piece sliding connection, controlling means inlays inside connecting device, controlling means is connected with brake equipment.

The gravity caster comprises a support, a caster shaft is fixed on the support, and the caster is sleeved on the caster shaft and arranged between two side walls of the support. And a brake device is arranged on one inner side wall of the bracket. The caster comprises a hub and a caster body. The end face of the wheel hub is provided with a brake wheel, and the brake wheel is matched with a brake device to complete brake operation. The truckle body is provided with connecting device, truckle piece and controlling means, connecting device one end and wheel hub elastic connection, the other end and truckle piece sliding connection. The control device is embedded in the connecting device and is connected with the brake device through a wire harness. When the wheel need stop at the upslope in-process, control brake equipment, make brake equipment and braked wheel cooperation, live the wheel brake, controlling means made the truckle piece side and ground contact with the truckle piece rear truckle piece that the atress is the biggest according to the atress condition analysis of truckle piece this moment, prevented to appear sliding backwards. When the wheels need to stop in the downhill process, the control device can pop the caster in front of the caster block with the largest stress, so that forward sliding is prevented. When the vehicle runs on a flat road, the control device is not acted by adjusting the control device. The truckle body and wheel hub elastic connection guarantee that the in-process shock attenuation effect of traveling is obvious, ensure to travel smoothly.

Preferably, the side face of the hub is provided with a plurality of semicircular grooves with cross sections, the inner walls of the grooves are provided with pressure sensing devices, and the pressure sensing devices are connected with elastic devices. The pressure sensing device can receive pressure signals, transmit the pressure signals to the control device through the wire harness, and analyze the pressure signals through the control device to perform the next action.

Preferably, one end of the connecting device is provided with a connecting block with a circular cross section, the other end of the connecting device is provided with a connecting groove with a sector cross section, the connecting block is sleeved with a fixing block, and the fixing block is fixedly connected with the side face of the hub. The connecting block is embedded into the groove, the matching relation of the connecting block and the groove is guaranteed, the fixing block is fixedly connected with the side face of the hub, the connecting block is prevented from being separated from the groove, the connecting block is guaranteed to be stably contacted with the pressure sensing device, and the connection stability is guaranteed.

As preferred, the fixed block cross section be with wheel hub assorted sector piece, the fixed block medial surface contacts with wheel hub, the fixed block medial surface is provided with the cross-section and is fan-shaped fixed recess, the fixed recess lateral wall aligns with the recess lateral wall and is connected, the fixed block lateral surface is provided with spacing hole, spacing hole matches with the connecting block and cup joints, spacing hole width is less than the circular diameter of connecting block cross section. The side wall of the fixing block is provided with a through hole, the side face of the wheel hub is provided with a threaded hole, the through hole of the fixing block is matched with the threaded hole, and the fixing block is connected with the wheel hub through bolts. After the connecting block is embedded into the groove, the connection stability of the connecting block and the pressure sensing device is ensured.

Preferably, the elastic device comprises a fixed plate, a buffering steel ball and a spring, the cross section of the fixed plate is an arc matched with the groove, the fixed plate is provided with a plurality of mounting holes, the buffering steel ball is embedded into the mounting holes, one end of the spring is fixedly connected with the inner wall of the pressure sensing device, the other end of the spring is fixedly connected with the buffering steel ball, the diameter of each mounting hole is smaller than that of the buffering steel ball, and the pressure sensing device is electrically connected with the control device. The pressure sensing device is connected with the control device through a wire harness, so that stable transmission signals are guaranteed, and the elastic device can provide a buffer function between the groove and the connecting block. The buffering steel balls are in point connection with the connecting blocks, so that the pressure transmitted by the elastic device to the pressure sensing device is more stable, the control device can obtain more effective data, and the stability is ensured.

Preferably, the connecting block is embedded into an arc-shaped groove formed by the fixing plate, and the connecting block is contacted with the buffering steel balls. The connecting block is in point contact with the buffering steel ball, so that the stress area is smaller, and the friction loss between the connecting block and the fixing plate is effectively prevented.

Preferably, the section of the caster block is fan-shaped, the short arc long surface of the caster block is matched with the connecting groove, the caster block is connected with a telescopic rod, one end of the telescopic rod is fixedly connected to the center of the short arc long surface of the caster block, and the other end of the telescopic rod is connected with the control device; after receiving the signal, the control device controls the telescopic rod to push the caster block out, so that the caster block is in contact with the ground to form a certain angle with the ground, and the vehicle sliding is prevented.

Preferably, the brake device comprises a brake swing rod, a locking tooth is arranged below the brake swing rod, the brake wheel is provided with a brake tooth, and the locking tooth is meshed with the brake tooth. The locking teeth can be contacted with the braking teeth and interact with the braking teeth by pressing the brake swing rod downwards, and the foot wheel is braked.

Preferably, the inner side wall of the bracket is provided with a limiting block, the outer side wall of the bracket is provided with an adjusting switch, a control contact switch is arranged below the limiting block, the control contact switch is electrically connected with a control device, and the control contact switch is in contact with the brake swing rod. According to different driving road conditions, when the vehicle runs on an uphill slope or a downhill slope, the adjusting switch needs to be adjusted to a corresponding position, the control device makes a corresponding control action according to the adjusting switch, the control contact switch is in contact with the brake swing rod, the control device can be electrified and activated, and the control device analyzes the received signals and makes related control operation.

Preferably, the caster block is a block structure made of polyurethane. The adjustable range of polyurethane performance is wide, strong adaptability has better wearability simultaneously, according to specific truckle service environment, can select the polyurethane truckle piece of best performance.

The invention has the beneficial effects that:

when the gravity caster wheel is parked on a slope road surface, the vehicle does not slide after being braked, the shock absorption effect is good when the caster wheel passes through an irregular road surface, and the running is smooth.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view taken at B-B of FIG. 1;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is a rear cross-sectional view of the caster block of FIG. 2 shown ejected;

FIG. 5 is a schematic view of the braking device according to the present invention.

In the drawings, there is shown in the drawings,

1. the brake comprises a bracket, 10 parts of a brake device, 11 parts of a limiting block, 12 parts of an adjusting switch, 13 parts of a control contact switch, 100 parts of a brake swing rod, 101 parts of a locking tooth and 140 parts of a brake tooth;

2. a caster shaft;

3. the caster comprises a caster body, a hub 30, a caster body 31, a brake wheel 32, a connecting device 33, a caster block 34, a control device 35, a groove 301, a groove 302, an elastic device 303, a pressure sensing device 304, a fixing plate 305, a buffering steel ball 306, a spring 307, a mounting hole 330, a connecting block 331, a connecting groove 332, a fixing block 333, a fixing groove 334, a limiting hole 340 and a telescopic rod.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

In the case of the example 1, the following examples are given,

as shown in fig. 1-2, a gravity caster comprises a frame 1, a caster shaft 2, and a caster 3. The caster 3 is sleeved on the caster shaft 2. The bracket 1 is connected with a caster shaft 2. The inner side surface of the bracket 1 is provided with a brake device 10. The caster 3 includes a hub 30 and a caster body 31. The end face of the hub 30 is provided with a brake wheel 32 matched with the brake device 10. The caster body 31 is provided with a connecting device 33, a caster block 34, and a control device 35. The caster blocks 34 are block-shaped structures made of polyurethane. One end of the connecting device 33 is elastically connected with the hub 30. The other end of the connecting device 33 is slidably connected with the caster block 34. The control device 35 is embedded in the connecting device 33, and the control device 35 is connected to the brake device 10.

As shown in FIG. 3, the side of the hub 30 is provided with a plurality of semicircular grooves 301 with cross sections, and the inner walls of the grooves 301 are provided with pressure sensing devices 303. The pressure sensing means 303 is connected with the resilient means 302. The connecting device 33 is provided at one end with a connecting block 330 having a circular cross section and at the other end with a connecting groove 331 having a sector-shaped cross section. The connecting block 330 is sleeved with a fixing block 332, and the fixing block 332 is fixedly connected with the side surface of the hub 30. The cross-section of the anchor block 332 is a segment that mates with the hub 30. The inner side of the fixing block 332 contacts the hub 30. The inner side surface of the fixing block 332 is provided with a fixing groove 333 with a sector section, and the side wall of the fixing groove 333 is aligned and connected with the side wall of the groove 30. The lateral surface of the fixed block 332 is provided with a limiting hole 334, the limiting hole 334 is sleeved with the connecting block 330 in a matching mode, and the width of the limiting hole 334 is smaller than the circular diameter of the cross section of the connecting block 330. The resilient means 302 includes a retaining plate 304, a cushioning ball 305, and a spring 306. The cross section of the fixing plate 304 is an arc matched with the groove 301, the fixing plate 304 is provided with a plurality of mounting holes 307, the buffering steel balls 305 are embedded into the mounting holes 307, one end of the spring 306 is fixedly connected with the inner wall of the pressure sensing device 303, and the other end of the spring 306 is fixedly connected with the buffering steel balls 305. The diameter of the mounting hole 307 is smaller than the diameter of the cushioning steel ball 305. The pressure sensing device 303 is electrically connected to the control device 35 via a wire harness. The connecting block 330 is inserted into the arc-shaped groove formed in the fixing plate 304, and the connecting block 330 is in contact with the buffering steel balls 305.

As shown in fig. 4, the section of the caster block 34 is fan-shaped, the short arc long surface of the caster block 34 matches with the connecting groove 331, the caster block 34 is connected with an expansion link 340, one end of the expansion link 340 is fixedly connected to the center of the short arc long surface of the caster block 34, and the other end of the expansion link 340 is connected with the control device 35.

As shown in fig. 5, the brake apparatus 10 includes a brake swing link 100, a locking tooth 101 is disposed under the brake swing link 100, a brake wheel 32 is provided with a brake tooth 140, and the locking tooth 101 is engaged with the brake tooth 140.

As shown in fig. 1 and 5, the inner side wall of the bracket 1 is provided with a limiting block 11, the outer side wall of the bracket 1 is provided with an adjusting switch 12, a control contact switch 13 is arranged below the limiting block 11, the control contact switch 13 is electrically connected with a control device 35, and the control contact switch 13 is in contact with a brake swing rod 100.

When the caster needs to stop in the process of ascending, the adjusting switch 12 is adjusted, the adjusting switch 12 is in an upward breaking mode, the brake device 10 is controlled, the locking teeth 101 and the brake teeth 140 are embedded into each other, braking is completed in a matching mode, the control contact switch 13 below the limiting block 11 is in contact with the brake swing rod 100, the control device 35 is activated, when the caster is braked, the pressure sensing device 303 is arranged in the groove 301, a pressure signal is received, the signal is analyzed and transmitted to the control device 35, the control device 35 pops out the caster block 34 behind the caster block 34 with the largest stress according to signal information, the popped-out caster block 34 is in contact with the bottom surface at a certain angle, and backward sliding is prevented. When the caster needs to stop in the downhill process, the adjusting switch 12 is adjusted to enable the adjusting switch 12 to be in the downhill mode, and the control device 35 pops up the caster block 34 in front of the caster block 34 with the largest stress according to the obtained analysis signal, so that forward sliding is prevented. When the vehicle runs on a relatively flat road surface, the adjusting switch 12 is adjusted to enable the adjusting switch 12 to be in a stable mode, and the caster brake is only used for braking the caster without popping up the caster block 34 when the caster is braked. The caster body 31 is connected with the hub 30 through the elastic device 302, so that the obvious damping effect and smooth running in the running process are effectively ensured.

Claims

1. A gravity caster is characterized by comprising a bracket (1), a caster shaft (2) and a caster (3), the caster wheel (3) is sleeved on the caster wheel shaft (2), the bracket (1) is connected with the caster wheel shaft (2), the inner side surface of the bracket (1) is provided with a brake device (10), the caster (3) comprises a hub (30) and a caster body (31), the end face of the wheel hub (30) is provided with a brake wheel (32) matched with the brake device (10), the caster body (31) is provided with a connecting device (33), a caster block (34) and a control device (35), one end of the connecting device (33) is elastically connected with the hub (30), the other end of the connecting device (33) is connected with the caster block (34) in a sliding way, the control device (35) is embedded in the connecting device (33), and the control device (35) is connected with the brake device (10).

2. The gravity caster according to claim 1, wherein the side of the hub (30) is provided with a plurality of semicircular grooves (301) with cross sections, the inner walls of the grooves (301) are provided with pressure sensing devices (303), and the pressure sensing devices (303) are connected with elastic devices (302).

3. The gravity caster as claimed in claim 2, wherein one end of the connecting device (33) is provided with a connecting block (330) with a circular cross section, the other end of the connecting device (33) is provided with a connecting groove (331) with a sector cross section, the connecting block (330) is sleeved with a fixed block (332), and the fixed block (332) is fixedly connected with the side surface of the hub (30).

4. The gravity caster as claimed in claim 3, wherein the cross section of the fixing block (332) is a sector block matched with the hub (30), the inner side of the fixing block (332) is in contact with the hub (30), a fixing groove (333) with a sector section is arranged on the inner side of the fixing block (332), the side wall of the fixing groove (333) is connected with the side wall of the groove (301) in an aligned mode, a limiting hole (334) is arranged on the outer side of the fixing block (332), the limiting hole (334) is sleeved with the connecting block (330) in a matched mode, and the width of the limiting hole (334) is smaller than the circular diameter of the cross section of the connecting block (330).

5. The gravity caster as claimed in claim 2, wherein the elastic device (302) comprises a fixing plate (304), buffering steel balls (305) and a spring (306), the cross section of the fixing plate (304) is an arc matched with the groove (301), the fixing plate (304) is provided with a plurality of mounting holes (307), the buffering steel balls (305) are embedded into the mounting holes (307), one end of the spring (306) is fixedly connected with the inner wall of the pressure sensing device (303), the other end of the spring is fixedly connected with the buffering steel balls (305), the diameter of each mounting hole (307) is smaller than that of each buffering steel ball (305), and the pressure sensing device (303) is electrically connected with the control device (35).

6. The gravity caster as claimed in claim 5, wherein the connecting block (330) is fitted into an arc-shaped groove formed in the fixed plate (304), and the connecting block (330) is in contact with the buffering steel ball (305).

7. The gravity caster as claimed in claim 3, wherein the caster block (34) has a fan-shaped cross section, the short arc long surface of the caster block (34) is matched with the connecting groove (331), the caster block (34) is connected with the telescopic rod (340), one end of the telescopic rod (340) is fixedly connected to the center of the short arc long surface of the caster block (34), and the other end of the telescopic rod (340) is connected with the control device (35).

8. A gravity caster according to claim 1, wherein said braking device (10) comprises a brake rocker (100), a locking tooth (101) being provided under said brake rocker (100), said brake wheel (32) being provided with a braking tooth (140), said locking tooth (101) being engaged with said braking tooth (140).

9. The gravity caster according to claim 1, characterized in that the inner side wall of the bracket (1) is provided with a limit block (11), the outer side wall of the bracket (1) is provided with an adjusting switch (12), a control contact switch (13) is arranged under the limit block (11), the control contact switch (13) is electrically connected with the control device (35), and the control contact switch (13) is in contact with the brake swing rod (100).

10. A gravity castor according to claim 1, wherein said castor block (34) is a block structure of polyurethane.