Universal wheel one-step double-brake system

Abstract

The utility model discloses a universal wheel one-step double-brake system which comprises a brake pedal, a first transmission rod, a second transmission rod, a brake transmission arm, a bottom inclined groove and a jacking inclined groove, a front foot connecting pipe is fixedly connected between front wheel seats in a sleeved mode, and the brake pedal is connected to the front foot connecting pipe in a rotating mode. A front foot connecting pipe serves as a sliding supporting structure of a first transmission rod, in the process of stepping on a brake pedal, a brake screw can drive the first transmission rod and a second transmission rod which are symmetrically arranged to be far away from each other under the action of a bottom inclined groove, and then the brake screw is matched with an ejecting inclined groove to eject a brake pressing block to slide down; then a brake transmission arm is matched to drive a wheel fork brake pin to synchronously press downwards, the synchronous locking process of the wheel bodies on the two sides can be completed at the same time, and the use experience of a user is improved; the brake transmission spring is used for resetting, and the wheel fork spring is matched for buffering the stress of the structure, so that the locking structure is prevented from plastic deformation or damage caused by overlarge stress in the use process, and the service life of the locking structure is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of universal wheel brakes, in particular to a universal wheel one-step double brake system. Background Art

[0002] A universal wheel refers to a wheel installed on a bracket of a caster wheel that can rotate 360 degrees horizontally under dynamic or static load. Its working principle is based on rotational motion and friction. When the universal wheel rotates, the small wheels around it rotate at different angles, generating a force vector in all directions; by reasonably controlling the rotation direction and speed of each small wheel, the vehicle or robot can be moved in any direction. Mobile carts equipped with universal wheels can assist users in transporting items and have been widely used in daily life; existing universal wheel mobile carts can basically meet daily use needs, but each set of universal wheels is relatively independent, and the two sets of universal wheels on both sides cannot be locked at the same time, which affects the user experience, and the locking structure is mostly rigidly connected by a connecting rod structure. The locking structure without buffering is prone to plastic deformation or damage due to excessive force during use, thereby affecting the service life of the locking structure; therefore, it is necessary to design a universal wheel one-step double brake system. Utility Model Content

[0003] The purpose of the utility model is to provide a universal wheel one-step double brake system to solve the problem that the existing universal wheel mobile cart can basically meet the daily use needs, but each set of universal wheels is relatively independent, and the two sets of universal wheels on both sides cannot be locked at the same time, which affects the user experience. In addition, the locking structure is mostly rigidly connected by a connecting rod structure, and the locking structure lacks a buffer and is prone to plastic deformation or damage due to excessive force during use, thereby affecting the service life of the locking structure.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a universal wheel one-step dual brake system, including a brake pedal, a first transmission rod, a brake screw, a front foot support tube, a second transmission rod, a brake pressure rod, a brake transmission arm, a brake transmission slider, a wheel fork brake pin, a front wheel seat, a bottom inclined groove, a top pressure inclined groove and a side slide. A front foot connecting tube is fixedly sleeved between the front wheel seats, and the front foot connecting tube is rotatably connected to the brake pedal. A bottom inclined groove is symmetrically provided at the bottom of the brake pedal, and a brake screw is slidably connected in the bottom inclined groove. The brake screw is fixedly connected to the bottom of the first transmission rod, and a transmission rod slider is slidably connected in the first transmission rod. A brake transmission spring is provided between the transmission rod slider and the first transmission rod, and the transmission rod slider passes through two lines on the front foot pedal. The cylinder is fixed to the front foot connecting tube and is slidably connected to the inside of the slide groove opened in the second transmission rod. The first transmission rod and the second transmission rod are fixedly connected to each other. A top pressure inclined groove is opened at the bottom of the other end of the second transmission rod. The top pressure inclined groove is slidably connected to the top of the brake pressure rod, and the bottom of the brake pressure rod is tightly pressed on the brake pressure block. The brake pressure block is slidably connected to the wheel fork bracket, and a pressure block spring is provided between the wheel fork bracket and the brake pressure block. The brake transmission arm is rotatably connected to the rivet, and one end of the brake transmission arm is rotatably connected to the brake transmission slider. The brake transmission slider is slidably connected to one side of the wheel fork brake pin, and a wheel fork spring is provided between the wheel fork brake pin and the brake transmission slider. The wheel fork brake pin and the brake transmission slider are both slidably connected to the side slide, and the side slide is opened on one side of the wheel fork bracket.

[0005] As a further technical solution of the present invention, a wheel fork outer cover is clamped and fixed to one side of the wheel fork bracket on which the side slideway is provided.

[0006] As a further technical solution of the present invention, a brake fixing block is fixedly connected to the wheel fork brake pin, and the wheel fork brake pin is slidably connected to the brake transmission slider.

[0007] As a further technical solution of the present invention, a wheel body is rotatably connected between the fork brackets, and a rivet is sleeved on the top of the fork bracket, the rivet is rotatably connected to the shock absorber seat, and a shock absorber spring is provided in the shock absorber seat.

[0008] As a further technical solution of the present invention, a quick-release button is slidably connected to the groove opened on one side of the shock absorber spring, and an iron leaf spring is arranged between the quick-release button and the fork bracket, and the quick-release button is fitted and connected to the annular groove opened on the side wall of the wheel seat shaft.

[0009] As a further technical solution of the present invention, the bottom of the wheel seat shaft is fixedly sleeved with a connecting sleeve, the connecting sleeve is sleeved on the bottom of the shock absorber seat, and the top of the shock absorber seat is sleeved on the bottom of the front wheel seat.

[0010] As a further technical solution of the present invention, the second transmission rod is slidably connected to the wheel seat shaft, and the wheel seat shaft is sleeved in the inner plug of the front wheel upper seat, the wheel seat shaft is sleeved on the bottom of the front wheel seat, and one side of the front wheel seat is cooperated with and clamped with the wheel seat rear cover, the top of the front wheel seat is fixedly sleeved with a front foot support tube, the front foot pedal is fixedly connected between the front wheel seats, and the front foot pedal is fitted on the front foot connecting tube, and a through groove is provided at the connection between the front foot pedal and the brake pedal.

[0011] The universal wheel one-step dual-brake system provided by the present invention has the following advantages: the front foot connecting tube is used as the sliding support structure of the first transmission rod; when the brake pedal is pressed, the brake screw at the bottom of the first transmission rod will drive the symmetrically arranged first transmission rod and the second transmission rod to move away from each other under the action of the bottom inclined groove; during the movement away, the top pressure inclined groove provided at the bottom of one end of the second transmission rod will act on the brake pressure rod to make the bottom of the brake pressure rod press the brake pressure block to slide in the wheel fork bracket; during the sliding process, the downward force is transmitted to the brake transmission slider through the transmission of the brake transmission arm; and then the brake transmission slider is pressed down along the side slideway through the wheel fork spring The elastic force of the wheel fork drives the wheel fork brake pin to be pressed down synchronously, and then the wheel fork brake pin is used to lock the rotating wheel body in the wheel fork bracket, which can complete the synchronous locking process of the wheel bodies on both sides at the same time, thereby improving the user experience; the brake transmission spring is used as the connecting structure of the transmission rod slider and the second transmission rod, and the wheel fork spring is used as the connecting structure of the brake transmission slider and the wheel fork brake pin, so that the entire locking structure is elastically connected, and the force of the structure is buffered by the reset of the brake transmission spring and the wheel fork spring, so as to avoid plastic deformation or damage of the locking structure due to excessive force during use, thereby extending the service life of the locking structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0014] Figure 2 It is a three-dimensional diagram of part of the structure of the utility model;

[0015] Figure 3 This is a side view of the overall structure of the utility model;

[0016] Figure 4 It is an exploded view of the overall structure of the utility model.

[0017] In the figure: 1. front foot pedal; 2. brake pedal; 3. front foot connecting pipe; 4. brake transmission spring; 5. transmission rod slider; 6. first transmission rod; 7. brake screw; 8. front foot support tube; 9. second transmission rod; 10. front wheel upper seat inner plug; 11. wheel seat rear cover; 12. brake pressure rod; 13. quick release button; 14. wheel seat shaft; 15. shock absorber seat; 16. connecting shaft sleeve; 17. iron leaf spring; 18. shock absorber spring; 19. brake pressure block; 20. pressure block spring; 21. fork bracket; 22. wheel body; 23. fork spring; 24. rivet; 25. fork outer cover; 26. brake fixing block; 27. brake transmission arm; 28. brake transmission slider; 29. fork brake pin; 30. front wheel seat; 31. bottom inclined groove; 32. top pressure inclined groove; 33. side slide. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0020] Please see the attached Figure 1 -Attached Figure 4The utility model provides an embodiment: a universal wheel one-step dual-brake system, including a brake pedal 2, a first transmission rod 6, a brake screw 7, a front foot support tube 8, a second transmission rod 9, a brake pressure rod 12, a brake transmission arm 27, a brake transmission slider 28, a wheel fork brake pin 29, a front wheel seat 30, a bottom inclined groove 31, a top pressure inclined groove 32 and a side slide 33. The front wheel seat 30 is fixedly sleeved with a front foot connecting tube 3, and the front foot connecting tube 3 is rotatably connected to the brake pedal 2. The bottom of the brake pedal 2 is symmetrically provided with a bottom inclined groove 31, and the brake screw 7 is slidably connected in the bottom inclined groove 31. The brake screw 7 is fixedly connected to the bottom of the first transmission rod 6, and the first transmission rod 6 is fixedly sleeved with a front foot connecting tube 3. A transmission rod slider 5 is slidably connected, and a brake transmission spring 4 is provided between the transmission rod slider 5 and the first transmission rod 6. The transmission rod slider 5 is fixed in the front foot connecting tube 3 through two cylinders on the front foot pedal 1. When the brake pedal 2 releases the brake, the first transmission rod 6 and the second transmission rod 9 are reset by the springs provided on the transmission rod slider 5 fixed in the front foot connecting tube 3, and the transmission rod slider 5 is slidably connected to the inside of the slide groove opened in the second transmission rod 9. The first transmission rod 6 and the second transmission rod 9 are fixedly connected to each other. A top pressure inclined groove 32 is provided at the bottom of the other end of the second transmission rod 9. The top pressure inclined groove 32 is slidably connected to the top of the brake pressure rod 12, and the brake pressure rod 12 The bottom is tightly pressed on the brake pressure block 19, and the brake pressure block 19 is slidably connected to the wheel fork bracket 21, and a pressure block spring 20 is provided between the wheel fork bracket 21 and the brake pressure block 19, and a brake fixing block 26 is fixedly connected to the wheel fork bracket 21, and one side of the brake fixing block 26 is just pressed above the wheel fork brake pin 29, so that the wheel fork brake pin 29 and the wheel fork bracket 21 maintain a sliding relationship while the two are inseparable, the wheel fork brake pin 29 is slidably connected to the brake transmission slider 28, and a wheel fork spring 23 is placed between the wheel fork brake pin 29 and the brake transmission slider 28. When the brake transmission slider 28 is pressed down, the wheel fork brake pin 29 is driven to be pressed down. The cylinder with the brake just inserts into the brake teeth of the wheel core when pressed down, thus playing a braking role. Since the brake teeth of the wheel core have convex teeth and concave teeth, when the wheel fork brake pin 29 is pressed down and hits the convex teeth, the wheel fork spring 23 provided in the brake transmission slider 28 and the wheel fork brake pin 29 will automatically compress to prevent the convex teeth of the wheel core from damaging the wheel fork brake pin 29. However, as long as the brake pedal 2 is kept in the braking state, even if the wheel fork brake pin 29 hits the convex teeth of the wheel core, it is only necessary to rotate the wheel a little so that the wheel fork brake pin 29 is just aligned with the concave teeth on the wheel core. Then, the wheel fork brake pin 29 will automatically insert into the concave teeth of the wheel core under the action of the wheel fork spring 23, thus playing a braking role.The rivet 24 is rotatably connected to a brake transmission arm 27, one end of the brake transmission arm 27 is rotatably connected to a brake transmission slider 28, the brake transmission slider 28 is slidably connected to one side of the wheel fork brake pin 29, and a wheel fork spring 23 is provided between the wheel fork brake pin 29 and the brake transmission slider 28, the wheel fork brake pin 29 and the brake transmission slider 28 are both slidably connected to the side slide 33, and the side slide 33 is provided on one side of the wheel fork bracket 21; the wheel fork bracket 21 is fixed with the wheel fork outer cover 25 on one side of the side slide 33; the wheel fork brake pin 29 is fixedly connected to the brake fixing block 26, and the wheel fork brake pin 29 is slidably connected to the brake transmission slider 28; the wheel fork bracket 21 is rotatably connected, and the top of the wheel fork bracket 21 is sleeved with a rivet 24, the rivet 24 is rotatably connected to the shock absorber seat 15, and the shock absorber spring 18 is provided in the shock absorber seat 15; the quick release button 13 is slidably connected in the groove provided on one side of the shock absorber spring 18, An iron spring 17 is provided between the quick release button 13 and the wheel fork bracket 21, and the quick release button 13 is connected in an annular groove provided on the side wall of the wheel seat shaft 14; the bottom of the wheel seat shaft 14 is fixedly sleeved with a connecting shaft sleeve 16, which is sleeved on the bottom of the shock absorber seat 15, and the top of the shock absorber seat 15 is sleeved on the bottom of the front wheel wheel seat 30; the second transmission rod 9 is slidably connected to the wheel seat shaft 14, and the wheel seat shaft 14 is sleeved in the inner plug 10 of the front wheel upper seat, and the wheel seat shaft 14 is sleeved At the bottom of the front wheel seat 30, and on one side of the front wheel seat 30, a wheel seat rear cover 11 is engaged with the front wheel seat, and a front foot support tube 8 is fixedly sleeved on the top of the front wheel seat 30. A front foot pedal 1 is fixedly connected between the front wheel seats 30, and the front foot pedal 1 fits on the front foot connecting tube 3. A through groove is provided at the connection between the front foot pedal 1 and the brake pedal 2. The front foot pedal 1 is fixed between the front wheel seats 30 to support and protect the front foot connecting tube 3, thereby improving the stability of the overall structure.

[0021] Specifically, when in use, the front foot connecting tube 3 serves as the sliding support structure of the first transmission rod 6. When the brake pedal 2 is stepped on, the brake screw 7 at the bottom of the first transmission rod 6 will drive the symmetrically arranged first transmission rod 6 and the second transmission rod 9 to move away from each other under the action of the bottom inclined groove 31. During the movement away, the top pressing inclined groove 32 opened at the bottom of one end of the second transmission rod 9 will act on the brake pressure rod 12 to make the bottom of the brake pressure rod 12 press the brake pressure block 19 to slide in the wheel fork bracket 21. During the sliding process, the downward force is transmitted to the brake transmission slider 28 through the transmission of the brake transmission arm 27. Then, during the process of the brake transmission slider 28 being pressed down along the side slide 33, the elastic force of the wheel fork spring 23 brings The dynamic wheel fork brake pin 29 is pressed down synchronously, and then the wheel fork brake pin 29 is used to lock the rotating wheel body 22 in the wheel fork bracket 21, which can complete the synchronous locking process of the wheel bodies 22 on both sides at the same time, thereby improving the user experience; the brake transmission spring 4 is used as the connecting structure of the transmission rod slider 5 and the first transmission rod 6, and the wheel fork spring 23 is used as the connecting structure of the brake transmission slider 28 and the wheel fork brake pin 29, so that the entire locking structure is elastically connected, and is reset by the brake transmission spring 4 and the wheel fork spring 23 is used to buffer the force on the structure, thereby avoiding plastic deformation or damage of the locking structure due to excessive force during use, thereby extending the service life of the locking structure.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0023] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A universal wheel one-step dual-brake system, comprising a brake pedal (2), a first transmission rod (6), a brake screw (7), a front foot support tube (8), a second transmission rod (9), a brake pressure rod (12), a brake transmission arm (27), a brake transmission slider (28), a wheel fork brake pin (29), a front wheel seat (30), a bottom inclined groove (31), a top pressure inclined groove (32) and a side slide (33), characterized in that: A front foot connecting tube (3) is fixedly sleeved between the front wheel seats (30), and a brake pedal (2) is rotatably connected to the front foot connecting tube (3). A bottom inclined groove (31) is symmetrically opened at the bottom of the brake pedal (2), and a brake screw (7) is slidably connected in the bottom inclined groove (31). The brake screw (7) is fixedly connected to the bottom of the first transmission rod (6), and a transmission rod slider (5) is slidably connected in the first transmission rod (6). A brake transmission spring (4) is provided between the transmission rod slider (5) and the first transmission rod (6). The transmission rod slider (5) is fixed in the front foot connecting tube (3) through two cylinders on the front foot pedal (1), and the transmission rod slider (5) is slidably connected to the inside of the sliding groove opened in the second transmission rod (9). The first transmission rod (6) and the second transmission rod (9) are fixedly connected to each other, and a top is opened at the bottom of the other end of the second transmission rod (9). The top pressing groove (32) is slidably connected to the top of the brake pressure rod (12), and the bottom of the brake pressure rod (12) is tightly pressed on the brake pressure block (19), the brake pressure block (19) is slidably connected to the wheel fork bracket (21), and a pressure block spring (20) is provided between the wheel fork bracket (21) and the brake pressure block (19), the rivet (24) is rotatably connected to the brake transmission arm (27), one end of the brake transmission arm (27) is rotatably connected to the brake transmission slider (28), the brake transmission slider (28) is slidably connected to one side of the wheel fork brake pin (29), and a wheel fork spring (23) is provided between the wheel fork brake pin (29) and the brake transmission slider (28), the wheel fork brake pin (29) and the brake transmission slider (28) are both slidably connected to the side slide (33), and the side slide (33) is opened on one side of the wheel fork bracket (21).

2. The universal wheel one-step dual-brake system according to claim 1, characterized in that: The wheel fork bracket (21) has a side on which a side slideway (33) is provided, and a wheel fork outer cover (25) is fixedly connected thereto.

3. The universal wheel one-step dual-brake system according to claim 1, characterized in that: The wheel fork brake pin (29) is fixedly connected with a brake fixing block (26), and the wheel fork brake pin (29) is slidably connected in a brake transmission slider (28).

4. The universal wheel one-step dual-brake system according to claim 2, characterized in that: A wheel body (22) is rotatably connected between the wheel fork brackets (21), and a rivet (24) is sleeved on the top of the wheel fork bracket (21). The rivet (24) is rotatably connected to the shock absorber seat (15), and a shock absorber spring (18) is provided in the shock absorber seat (15).

5. The universal wheel one-step dual-brake system according to claim 4, characterized in that: A quick release button (13) is slidably connected in a groove formed on one side of the shock-absorbing spring (18), and an iron leaf spring (17) is provided between the quick release button (13) and the wheel fork bracket (21). The quick release button (13) is cooperatively connected in an annular groove formed on the side wall of the wheel seat shaft (14).

6. The universal wheel one-step dual-brake system according to claim 5, characterized in that: The bottom of the wheel seat shaft (14) is fixedly sleeved with a connecting shaft sleeve (16), the connecting shaft sleeve (16) is sleeved on the bottom of the shock absorber seat (15), and the top of the shock absorber seat (15) is rotatably connected to the bottom of the front wheel seat (30).

7. The universal wheel one-step dual-brake system according to claim 1, characterized in that: The second transmission rod (9) is slidably connected to the wheel seat shaft (14), and the wheel seat shaft (14) is sleeved in the front wheel upper seat inner plug (10), the wheel seat shaft (14) is sleeved on the bottom of the front wheel wheel seat (30), and one side of the front wheel wheel seat (30) is matched with the wheel seat rear cover (11), the top of the front wheel wheel seat (30) is fixedly sleeved with the front foot support tube (8), the front wheel wheel seats (30) are fixedly connected with the front foot pedal (1), and the front foot pedal (1) is fitted on the front foot connecting tube (3), and a through groove is provided at the connection between the front foot pedal (1) and the brake pedal (2).

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