Central braking system and movable equipment

Abstract

The utility model provides a central braking system and movable equipment, the central braking system comprises a rotating shaft assembly, a connecting rod assembly and a reset driving assembly, the rotating shaft assembly comprises a rotating shaft, a pedal connecting block and a reset structure, the pedal connecting block is connected to the rotating shaft, and the reset structure is used for resetting the pedal connecting block; the connecting rod assembly is connected with the rotating shaft and trundles of the movable equipment; the reset driving assembly comprises a rotating part, a fixing part and a position changing part, the rotating part is arranged on the rotating shaft and comprises a locking push rod, a guide path is arranged on the fixing part, a locking hole is formed in the middle area of the guide path, one end of the locking push rod is matched with the guide path, and the position changing part can change the depth of the locking push rod extending into the guide path; therefore, when the pedal is repeatedly treaded, the locking push rod is switched between stretching into the locking hole and separating from the locking hole. The function that the pedal automatically rebounds to release the brake when the brake is stepped on and the foot is released when the pedal is stepped on again can be achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of brake systems, and in particular relates to a central brake system and a movable device having the system. Background Art

[0002] Centrally controlled braking systems are used on mobile devices. They allow the operator to control the braking and releasing of the mobile device through body movements. Centrally controlled braking mechanisms typically control parking, steering, and universal movement of the mobile device by simultaneously controlling one or more centrally controlled casters. Compared to individually controlling the braking and releasing of each caster, centrally controlled braking systems offer greater convenience and speed.

[0003] Existing centrally controlled braking systems typically require the operator to press and release the pedal to switch between braking and releasing positions. Because there are two different actions, the operator must determine whether to press or depress. Generally speaking, pressing the pedal with the foot is very operator-unfriendly. First, due to gravity, pressing the pedal requires more effort than pressing it. Second, pressing the pedal with the instep can cause injury to the operator's instep if the instep is not properly protected. The pedal can also cause irreversible wear to the operator's shoes. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a central braking system and a movable device to solve the technical problem of inconvenient operation of the central control braking system in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this application is: This application provides a central braking system, including:

[0006] The shaft assembly includes a shaft, a pedal connecting block and a reset structure, wherein the pedal connecting block is connected to the shaft, and the reset structure is used to reset the pedal connecting block;

[0007] A connecting rod assembly, wherein the rotating shaft and the casters of the movable device are connected through the connecting rod assembly;

[0008] The reset drive assembly includes a rotating part, a fixed part and a transposition part. The rotating part is arranged on the rotating shaft and includes a locking push rod. A guide path is provided on the fixed part, and a locking hole is formed in the middle area of ​​the guide path. One end of the locking push rod cooperates with the guide path.

[0009] By locking the push rod in different positions during its reciprocating motion, gear shifting is achieved. This allows the user to "step on the brake once, step on it again and release it, and the pedal automatically rebounds to release the brake." Furthermore, the system is simple and reliable, labor-saving and efficient, easy to operate, with good human-computer interaction and excellent maintainability.

[0010] Optionally, the rotating portion further includes a base and an elastic structure, wherein the locking push rod is disposed on the base, and the elastic structure is disposed between the base and the locking push rod, and the locking push rod abuts against the guide path under the action of the elastic structure. The structure of the rotating portion is simple while ensuring that the locking push rod can switch between inserting into the locking hole and disengaging from the locking hole.

[0011] Optionally, the shifting portion is a resetter, disposed on the base body and located on a side facing away from the fixed portion. One end of a locking push rod extends through the base body and is connected to the shifting portion. The other end of the locking push rod is sleeved with an elastic structure and abuts against the guide path. The structure of the shifting portion allows the caster to be locked by pressing the pedal deeply, and then released by pressing the pedal further, providing convenient operation.

[0012] Optionally, the shifting unit is disposed below the locking push rod, with a limit ring disposed on the side of the locking push rod near the guide path. The shifting unit also includes a shifting seat, a paddle shaft, and a paddle torsion spring. The paddle is fixed to the paddle shaft, the paddle shaft is rotatably connected to the shifting seat, and the paddle torsion spring is sleeved on the paddle shaft. The limit ring cooperates with the paddle. The shifting unit structure allows the caster to be locked by lightly pressing the pedal and unlocked by further pressing the pedal, providing convenient operation.

[0013] Optionally, the height of the top surface of the paddle close to the locking hole is higher than the height of other positions on the top surface of the paddle, so that the limiting ring can quickly detach from the limiting ring when the paddle is squeezed.

[0014] Optionally, the seat body is further provided with a limit pin, the fixing portion is provided with a guide groove, and the limit pin is inserted into the guide groove. Positioning is achieved through the guide groove and the limit pin.

[0015] Optionally, the locking push rod includes a main body and a head, the head is detachably connected to the main body, and the free end of the head is matched with the guide path. The locking push rod includes the main body and the head, which meets the strength requirements and saves costs.

[0016] Optionally, the guide path includes a front path and a rear path, the front path and the rear path being connected; a locking hole is provided at the intersection of the rear path and the front path, the locking hole being deeper than the front path; the depth of the rear path gradually decreases as it approaches the locking hole and moves away from the locking hole. The guide path has a simple structure and can be used in conjunction with the locking push rod to achieve the function of "pressing the brake once, pressing it again and releasing the foot, and the pedal automatically rebounding to release the brake."

[0017] This application also provides a mobile device comprising a pedal, casters, and a central brake system according to any of the above technical solutions, wherein the central brake system's rotating shaft assembly is connected to the pedal, and the central brake system's connecting rod assembly is connected to the casters. Due to the above technical solution, the mobile device includes the above central brake system and thus possesses at least all the beneficial effects of the central brake system, which will not be further elaborated here.

[0018] Optionally, there are one or more central brake systems, each of which is connected to at least one pedal. That is, a reasonable number of central brake systems is selected and set according to the needs of the mobile device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 A schematic diagram of the structure of a single pedal connected to a central brake system provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the structure of a movable device with two pedals provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of the structure of two pedals provided in an embodiment of the present application, each of which is connected to a central brake system;

[0023] Figure 4 A schematic diagram of the structure of two pedals provided in an embodiment of the present application, each of which is connected to a central brake system;

[0024] Figure 5 A schematic diagram of the positional relationship between the rotating shaft assembly and the reset drive assembly provided in an embodiment of the present application;

[0025] Figure 6 A schematic structural diagram of a first connecting rod assembly provided in an embodiment of the present application;

[0026] Figure 7 A schematic structural diagram of a second connecting rod assembly provided in an embodiment of the present application;

[0027] Figure 8 A schematic structural diagram of a rotating shaft assembly provided in an embodiment of the present application;

[0028] Figure 9 A schematic diagram of the structure of the reset drive assembly provided in an embodiment of the present application;

[0029] Figure 10 A schematic structural diagram of the fixing portion of the reset drive assembly provided in an embodiment of the present application;

[0030] Figure 11 A schematic diagram of the state changes of the central braking system provided in an embodiment of the present application;

[0031] Figure 12 A schematic diagram of the state change process of the central braking system provided in an embodiment of the present application;

[0032] Figure 13 A schematic diagram of the structure of the reset drive assembly provided in an embodiment of the present application;

[0033] Figure 14 A schematic structural diagram of a transposition portion of a reset drive assembly provided in an embodiment of the present application;

[0034] Figure 15 A schematic diagram showing the positional relationship between the locking push rod, the fixing portion, and the transposition portion of the rotating portion provided in an embodiment of the present application;

[0035] Figure 16 A schematic diagram of the state changes of the central braking system provided in an embodiment of the present application;

[0036] Figure 17 Schematic diagram of the positional relationship among the locking push rod, the fixing portion and the transposition portion of the rotating portion provided in an embodiment of the present application.

[0037] Among them, the reference numerals in the figures are:

[0038] 1-Central brake system; 2-Main unit; 3-Adjustment arm; 4-Control panel; 5-Monitor stand; 6-Monitor; 7-Pedals; 8-Castors; 9-Fixed mounting base;

[0039] 11-rotating shaft assembly; 12-connecting rod assembly; 13-reset drive assembly;

[0040] 111 - rotating shaft; 112 - rotating shaft bearing seat; 113 - torsion spring fixing bracket; 114 - reset torsion spring; 115 - pedal connecting block; 116 - shaft sleeve; 117 - reset structure;

[0041] 121-first connecting rod assembly; 122-second connecting rod assembly;

[0042] 1211 - Connecting rod 1; 1212 - Front and rear connecting rods; 1213 - Connecting rod 2; 1214 - First front caster shaft; 1215 - Rear caster shaft; 1216 - First connecting rod bearing seat;

[0043] 1221 - Connecting rod three; 1222 - Front connecting rod; 1223 - Connecting rod four; 1224 - Second front caster shaft; 1225 - Second connecting rod bearing seat;

[0044] 131-rotating portion; 132-fixing portion; 133-transposition portion;

[0045] 1311-locking push rod; 1312-base; 1313-elastic structure; 1314-U-shaped notch; 1315-U-shaped groove; 1316-limiting pin;

[0046] 13111-limiting ring; 13112-main body; 13113-head; 13114-blocking plate;

[0047] 1321-guide path; 1322-guide groove;

[0048] 13211-front path; 13212-back path; 13213-locking hole;

[0049] 1331-transposition seat body; 1332-paddle shaft; 1333-paddle torsion spring; 1334-paddle;

[0050] 81-castor A; 82-castor B;

[0051] 71-Pedal A; 72-Pedal B;

[0052] Ⅰ-first position; Ⅱ-second position; Ⅲ-third position. DETAILED DESCRIPTION

[0053] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0054] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0055] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0057] A central brake system 1 provided in this embodiment includes: a rotating shaft assembly 11, a connecting rod assembly 12 and a reset drive assembly 13, the rotating shaft assembly 11 includes a rotating shaft 111, a pedal connecting block 115 and a reset structure, the pedal connecting block 115 is connected to the rotating shaft 111, and the reset structure is used to reset the pedal connecting block 115; the connecting rod assembly 12 connects the rotating shaft 111 and the caster 8 of the movable device; the reset drive assembly 13 includes a rotating part 131, a fixed part 132 and a transposition part 133, the rotating part 131 is arranged on the rotating shaft 111 and the rotating part 131 includes a locking push rod 1311, a guide path 1321 is provided on the fixed part 132 and a locking hole 13213 is formed in the middle area of ​​the guide path 1321, and one end of the locking push rod 1311 cooperates with the guide path 1321.

[0058] In this embodiment, the shifting portion 133 can change the depth of the locking push rod 1311 extending into the guide path 1321, so that when the pedal 7 is repeatedly stepped on, the locking push rod 1311 switches between extending into the locking hole 13213 and disengaging from the locking hole 13213.

[0059] During use, when pedal 7 is stepped on, pedal 7 and pedal connecting block 115 rotate relative to shaft 111, causing the reset structure to enter a compressed state. Rotation of shaft 111 drives rotation of rotating portion 131 connected to shaft 111. Rotating portion 131 is provided with a locking push rod 1311. Rotation of rotating portion 131 drives one end of locking push rod 1311 to move within guide path 1321. A locking hole 13213 is formed in the central region of guide path 1321. The shifting portion 133 adjusts the depth to which locking push rod 1311 extends into guide path 1321, allowing locking push rod 1311 to switch between entering and exiting locking hole 13213 when pedal 7 is repeatedly stepped on. When locking push rod 1311 enters locking hole 13213, pedal 7 rotates a certain angle. When locking push rod 1311 exits locking hole 13213, pedal 7 is reset by the reset structure.

[0060] By locking the push rod 1311 in different positions during its reciprocating motion, the gear shift function is realized, enabling the "step on the brake once, step on it again and release your foot, and the pedal 7 automatically rebounds to release the brake." Furthermore, the system is simple and reliable, labor-saving and efficient, easy to operate, with good human-computer interaction and excellent maintainability. It does not require a closed housing or high precision, has low manufacturing costs, and features an open, modular structure, allowing for rapid troubleshooting and resolution should any malfunction occur.

[0061] See also Figure 1 , schematically showing a pedal 7. In one embodiment, the movable device includes a pedal 7. At this time, the single pedal 7 is connected to a single or multiple casters 8 through a central brake system 1. Step on the pedal 7 once to brake, and step on the pedal 7 again to release the brake.

[0062] Figure 1 In the figure, the central brake system 1 is shown as a shaft assembly 11 supported on a fixed mounting base 9, the shaft assembly 11 is connected to the connecting rod assembly 12, and the connecting rod assembly 12 is connected Figure 1 The two casters 8 are arranged at the front and rear of the right side, and Figure 1 The two casters 8 arranged in front and behind on the left side are not connected to the shaft assembly 11. In addition, Figure 1 The figure also shows a main unit 2, an adjustment arm 3, a control panel 4, a display bracket 5 and a display 6 of the movable device.

[0063] See also Figure 2, illustrating that the movable device includes two pedals 7. In other words, in one embodiment, the movable device includes two pedals 7, each of which is connected to a central brake system 1, and the two central brake systems 1 are respectively connected to different casters 8. One pedal 7 can be used for braking, that is, pressing pedal 7 once to brake, and pressing pedal 7 again to release the brake; the other pedal 7 can be used for directional straight driving, that is, pressing pedal 7 once to drive straight in a certain direction, and pressing pedal 7 again to release the directional straight driving.

[0064] See also Figure 3 A pedal A71 is connected to a shaft assembly 11 of a central brake system 1, and the shaft assembly 11 is connected Figure 3 The connecting rod assembly 12 on the right side is connected to the three casters A81; the other pedal B72 is connected to the shaft assembly 11 of the other central brake system 1, and the shaft assembly 11 is connected Figure 3 The connecting rod assembly 12 on the left side is connected to a caster BA82.

[0065] Depending on different needs, the mobile device can be equipped with one central brake system 1 connected to a single pedal 7, or two central brake systems 1 can be equipped with two pedals 7, respectively; or the mobile device can be equipped with another number of central brake systems 1, with each central brake system 1 connected to at least one pedal 7. In addition, the gear function of the caster 8 can be configured differently according to user needs.

[0066] In conjunction with the accompanying drawings, the specific structure of the central brake system 1 is described by taking the movable device including two pedals 7 as an example:

[0067] See also Figure 4-Figure 5 In one embodiment, the two pedals 7 of the movable device are independently installed on two rotating shaft assemblies 11, the two pedals 7 are arranged side by side, and the two rotating shaft assemblies 11 are arranged side by side with the pedals 7. One end of each rotating shaft assembly 11 is connected to a connecting rod assembly 12, and the two connecting rod assemblies 12 are respectively connected to the corresponding casters 8, and each rotating shaft assembly 11 is connected to a reset drive assembly 13, so that the overall structural layout is compact.

[0068] In one embodiment, the structures of the two connecting rod assemblies 12 can be set differently, see Figure 3-4 、 Figure 6-Figure 7 The two connecting rod assemblies 12 are respectively a first connecting rod assembly 121 and a second connecting rod assembly 122. The first connecting rod assembly 121 is connected to three casters A81, and the second connecting rod assembly 122 is connected to one caster B82.

[0069] See also Figure 6The first connecting rod assembly 121 includes a connecting rod 1211, a front and rear connecting rod 1212, a connecting rod 2 1213, a first front caster shaft 1214, a rear caster shaft 1215 and a first connecting rod bearing seat 1216. One end of the connecting rod 1211 is rotatably connected to the front and rear connecting rods 1212, and the other end of the connecting rod 1211 is rotatably connected to the shaft assembly 11 (the shaft 111 of the shaft assembly 11 passes through the connecting rod 1211 to realize the rotatable connection between the connecting rod 1211 and the shaft 111). The two ends of the front and rear connecting rods 1212 are respectively provided with Connecting rod 2 1213, connecting rod 2 1213 is rotatably connected to the front and rear connecting rods 1212, one of the connecting rods 1213 is connected to the first front caster shaft 1214, the first front caster shaft 1214 is connected to the front caster A81, and the other connecting rod 2 1213 is connected to the rear caster shaft 1215, the rear caster shaft 1215 is connected to the two rear casters A81, a first connecting rod bearing seat 1216 is set at one end of the first front caster shaft 1214, and first connecting rod bearing seats 1216 are set at both ends of the rear caster shaft 1215.

[0070] See also Figure 7 The second connecting rod assembly 122 includes a connecting rod three 1221, a front connecting rod 1222, a connecting rod four 1223, a second front caster shaft 1224, and a second connecting rod bearing seat 1225. One end of the connecting rod three 1221 is rotatably connected to the front connecting rod 1222, and the other end of the connecting rod three 1221 is rotatably connected to the shaft assembly 11 (the shaft 111 of the shaft assembly 11 passes through the connecting rod three 1221 to realize the rotatable connection between the connecting rod three 1221 and the shaft 111). One end of the front connecting rod 1222 is rotatably connected to the connecting rod four 1223, and one end of the connecting rod four 1223 is rotatably connected to the second front caster shaft 1224. The second front caster shaft 1224 is connected to a front caster B82, and a second connecting rod bearing seat 1225 is provided on the second front caster shaft 1224.

[0071] It should be noted that regarding the structure of the connecting rod assembly 12, Figure 6 and Figure 7 Only one example of the first connecting rod assembly 121 and the second connecting rod assembly 122 is given, which should not be considered as a special limitation to the present application.

[0072] In one embodiment, the structures of the two connecting rod assemblies 12 can be set to be the same. For example, the two connecting rod assemblies 12 are respectively connected to a front caster 8 and a rear caster 8. In this case, the structures of the two connecting rod assemblies 12 can be set to be the same. The specific structure of the connecting rod assembly 12 can achieve the movement of the caster 8 when the shaft assembly 11 rotates. No excessive restrictions are applied and no additional restrictions are made.

[0073] See also Figure 5 and Figure 8The two shaft assemblies 11 have the same structure. The shaft assembly 11 includes a shaft 111, a pedal connecting block 115, and a reset structure. The pedal 7 is connected to the pedal connecting block 115, which is connected to the shaft 111. The reset structure is used to reset the pedal connecting block 115. The pedal connecting block 115 can facilitate the connection between the pedal 7 and the shaft 111.

[0074] Regarding the reset structure, in one embodiment, see Figure 8 The reset structure includes a reset torsion spring 114 and a torsion spring fixing bracket 113. A shaft bearing seat 112 is provided at both ends of the rotating shaft 111. The rotating shaft 111 is supported by the shaft bearing seat 112. The rotating shaft 111 passes through a pedal connecting block 115, which is fixed to the rotating shaft 111. The reset torsion spring 114 is sleeved on the rotating shaft 111. The torsion spring fixing bracket 113 is fixed in position. The two ends of the reset torsion spring 114 are respectively fixed to the pedal connecting block 115 and the torsion spring fixing bracket 113. The reset structure uses a reset torsion spring 114, which has a simple structure and is convenient for processing and manufacturing the rotating shaft assembly 11.

[0075] When the pedal 7 is stepped on downward, the pedal connecting block 115 drives the rotating shaft 111 to rotate together, and the return torsion spring 114 is in a compressed state; when the pedal 7 is stepped on downward so that the locking push rod 1311 disengages from the locking hole 13213, the pedal 7, the pedal connecting block 115, and the rotating shaft 111 rotate in the reset direction under the action of the return torsion spring 114.

[0076] Preferably, a sleeve 116 is provided on the rotating shaft 111, and a sleeve 116 is provided on both sides of the pedal connecting block 115. The sleeve 116 is fixed to the rotating shaft 111, and the return torsion spring 114 is sleeved on the sleeve 116. The outer circumferential side surface of the sleeve 116 is a cylindrical surface. The sleeve 116 is preferably provided on the rotating shaft 111, but of course, the sleeve 116 can also be omitted.

[0077] A reset drive assembly 13 is provided on the rotating shaft 111 of the two rotating shaft assemblies 11. The reset drive assembly 13 includes a rotating part 131, a fixed part 132 and a transposition part 133. The rotating part 131 is provided on the rotating shaft 111 and the rotating part 131 includes a locking push rod 1311. A guide path 1321 is provided on the fixed part 132 and a locking hole 13213 is formed in the middle area of ​​the guide path 1321. One end of the locking push rod 1311 cooperates with the guide path 1321. The transposition part 133 can change the depth of the locking push rod 1311 extending into the guide path 1321, so that when the pedal 7 is repeatedly stepped on, the locking push rod 1311 switches between extending into the locking hole 13213 and disengaging from the locking hole 13213.

[0078] In one embodiment, the rotating parts 131 of the two reset drive assemblies 13 are close to each other, and the position of the rotating part 131 on the rotating shaft 111 is close to one end of the rotating shaft 111, so that the two rotating parts 131 are close to each other. Furthermore, the fixing parts 132 of the two reset drive assemblies 13 can be arranged between the two rotating parts 131, so that the overall structural layout is compact.

[0079] Preferably, see Figure 9 The fixing parts 132 of the two reset drive components 13 are integrated (referred to as an integral fixing part), and the integral fixing part is provided with guide paths 1321 on two opposite sides along the length direction of the rotating shaft 111. This not only reduces the number of parts but also makes the structure more compact.

[0080] See also Figure 17 When the movable device includes only one pedal 7 , a guide path 1321 is provided on one side of the fixed portion 132 to cooperate with the locking push rod 1311 of the rotating portion 131 .

[0081] In one embodiment, see Figure 10 The guide path 1321 includes a front path 13211 and a rear path 13212. The front path 13211 and the rear path 13212 are connected. A locking hole 13213 is provided at the intersection of the rear path 13212 and the front path 13211. The depth of the locking hole 13213 is greater than the depth of the front path 13211. The depth of the rear path 13212 gradually becomes shallower along the direction from approaching the locking hole 13213 to away from the locking hole 13213.

[0082] The side of the front path 13211 away from the rear path 13212 is the initial position of the guide path 1321, and the side of the rear path 13212 away from the front path 13211 is the end position of the guide path 1321. When the locking push rod 1311 is in the initial position, the pedal 7 is in the reset state. Stepping on the pedal 7 causes the locking push rod 1311 to move along the guide path 1321 to the locking hole 13213. At this time, when the pedal 7 is released, the pedal 7 rotates a certain angle. Stepping on the pedal 7 again causes the locking push rod 1311 to disengage from the locking hole 13213 and move along the rear path 13212. As the height of the rear path 13212 gradually increases, the shifting portion 133 changes the depth to which the locking push rod 1311 extends into the guide path 1321. When the pedal 7 is released again, the locking push rod 1311 moves along the rear path 13212 to the initial position of the front path 13211. At this time, the pedal 7 is in the reset state.

[0083] In this embodiment, the depth of the rear path 13212 gradually becomes shallower as it approaches the locking hole 13213 and moves away from the locking hole 13213. Specifically, the depth of the rear path 13212 can be set to d, and the depth value d of the rear path 13212 gradually becomes smaller as it approaches the locking hole 13213 and moves away from the locking hole 13213. For example, the depth value d can be 0, in which case the rear path 13212 is flush with the fixing portion 132; in a specific embodiment, see Figure 10 The rear path 13212 gradually protrudes from the fixing portion 132 along the direction from close to the locking hole 13213 to away from the locking hole 13213. When the rear path 13212 protrudes from the fixing portion 132, the depth value d of the rear path 13212 can be considered to be a negative value.

[0084] In one example, the front path 13211 is an arc-shaped groove, and the rear path 13212 is also arc-shaped as a whole.

[0085] By cooperating with the guide path 1321 and the position-changing portion 133 , the function of “stepping on the brake once, stepping on it again and releasing the foot, and the pedal 7 automatically rebounding to release the brake” is realized, which has a simple structure and is easy to operate.

[0086] In one embodiment, see Figure 9 and Figure 15 The locking push rod 1311 includes a main body 13112 and a head 13113 . The head 13113 is arranged at one end of the main body 13112 . The head 13113 is detachably connected to the main body 13112 . The free end of the head 13113 cooperates with the guide path 1321 .

[0087] Since the end of the locking push rod 1311 needs to cooperate with the guide path 1321, the strength and wear resistance requirements of the end of the locking push rod 1311 are relatively high. Therefore, the locking push rod 1311 is divided into two parts, namely the main body 13112 and the head 13113. The strength and wear resistance of the material used for the head 13113 can be better than the main body 13112. In this way, not only the mechanical performance requirements of the locking push rod 1311 are met, but also the cost is saved.

[0088] For example, the shape of the head 13113 is round or conical. Of course, the head 13113 can also be set as a cylinder with rounded or beveled corners. That is, this embodiment does not limit the specific shape of the head 13113.

[0089] The head portion 13113 is detachably connected to the main body portion 13112 , and the head portion 13113 can be replaced as needed to ensure that the central brake system 1 can work normally.

[0090] Preferably, the head 13113 and the main body 13112 are detachably connected by a threaded connection, which is simple and convenient for disassembly. For example, a threaded column is provided on the head 13113, and a threaded hole is provided on the main body 13112. The threaded column is inserted into the threaded hole to achieve the threaded connection between the head 13113 and the main body 13112.

[0091] In one embodiment, see Figure 9 and Figure 13 The rotating portion 131 further includes a base 1312 and an elastic structure 1313. A locking push rod 1311 is disposed on the base 1312, with the elastic structure 1313 disposed between the base 1312 and the locking push rod 1311. The elastic structure 1313 acts to cause the locking push rod 1311 to abut against the guide path 1321. The base 1312 supports the locking push rod 1311, and the elastic structure 1313 cooperates with the shifting portion 133 to control the position of the locking push rod 1311. Because the height of the rearward path 13212 gradually increases from approaching the frontward path 13211 to moving away from the frontward path 13211, when the locking push rod 1311 moves from the locking hole 13213 to the end position of the guide path 1321, the locking push rod 1311 is squeezed away from the fixed portion 132, and the elastic structure 1313 is compressed.

[0092] Regarding the position of the elastic structure 1313 on the locking push rod 1311, in one embodiment, see Figure 9 A blocking plate 13114 is provided on the head 13113 of the locking push rod 1311. The elastic structure 1313 is preferably a spring. The elastic structure 1313 is mounted on the locking push rod 1311 and is squeezed between the blocking plate 13114 and the seat 1312 (the outer wall of the seat 1312). In addition, the blocking plate 13114 provided on the head 13113 of the locking push rod 1311 can later be used as a retaining ring 13111, as described in detail below.

[0093] Regarding the position of the elastic structure 1313 on the locking push rod 1311, in another embodiment, see Figure 13 A U-shaped notch 1314 is provided on the seat body 1312, and a blocking plate 13114 is provided on the main body 13112 of the locking push rod 1311. The elastic structure 1313 is sleeved on the locking push rod 1311 and is located at the U-shaped notch 1314 of the seat body 1312. The elastic structure 1313 is squeezed between the blocking plate 13114 and the seat body 1312 (the side wall of the U-shaped notch 1314).

[0094] Regarding the connection between the seat body 1312 and the rotating shaft 111, in one embodiment, see Figure 9 and Figure 13A U-shaped groove 1315 is provided on the top of the seat body 1312 to form two connecting arms, and the rotating shaft 111 passes through the two connecting arms in sequence. By providing the connecting arms, the weight of the seat body 1312 can be reduced and the cost can be saved.

[0095] In one embodiment, see Figure 9 and Figure 13 The seat body 1312 is further provided with a limit pin 1316, and the fixing portion 132 is provided with a guide groove 1322, and the limit pin 1316 is inserted into the guide groove 1322. The limit pin 1316 has a limiting function to limit the stroke of the pedal 7.

[0096] See also Figure 10 , indicating that the arc-shaped guide groove 1322 is arranged above the guide path 1321. Here, it should be noted that when the fixing parts 132 of the two reset drive components 13 are arranged as one body, the guide grooves 1322 are respectively arranged on the two opposite sides of the integral fixing part along the length direction of the rotating shaft 111. Figure 17 When the movable device includes only one pedal 7 , a guide groove 1322 is provided on one side of the fixing portion 132 to cooperate with the limiting pin 1316 on the seat body 1312 .

[0097] Regarding the structure of the transposition portion 133, in one embodiment, see Figure 9 The displacement portion 133 serves as a resetter and is located on the base 1312, facing away from the fixed portion 132. One end of the locking push rod 1311 passes through the base 1312 and connects to the displacement portion 133. The other end of the locking push rod 1311 is sleeved with an elastic structure 1313 and abuts against the guide path. When the locking push rod 1311 is at the end of the guide path 1321, the locking push rod 1311 moves toward the displacement portion 133 under the pressure of the guide path 1321, acting on the displacement portion 133 and compressing the elastic structure 1313.

[0098] Regarding the working principle of the resetter: when the locking push rod 1311 is located at the initial position of the guide path 1321, the pedal 7 is in the reset state; stepping on the pedal 7 causes the locking push rod 1311 to move along the guide path 1321 to the end position of the guide path 1321, and the locking push rod 1311 squeezes the resetter so that the connection between the resetter and the locking push rod 1311 is released. At this time, when the pedal 7 is released, the pedal 7 rotates in the opposite direction by a certain angle, and the locking push rod 1311 is inserted into the locking hole 13213 under the action of the elastic structure 1313 thereon; stepping on the pedal 7 again, the locking push rod 1311 disengages from the locking hole 13213 and moves along the rear path 13212 to the end position, and the locking push rod 1311 squeezes the resetter so that the resetter grabs the locking push rod 1311, so that when the pedal 7 is released again, the locking push rod 1311 moves along the rear path 13212 to the initial position of the front path 13211. At this time, the pedal 7 is in the reset state.

[0099] The resetter includes but is not limited to the following: a ball rebounder, a cabinet door rebounder, a press rebounder, etc. The resetter is used in conjunction with the locking push rod 1311 to simplify the structure of the transposition portion 133.

[0100] In the embodiment where the shifting portion 133 is a resetter, the specific operation of the central brake system 1 is as follows:

[0101] See also Figure 11, stepping on the pedal 7, the pedal connecting block 115 fixedly connected to the pedal 7 drives the corresponding rotating shaft 111 to rotate around the axis. At this time, the pedal connecting block 115 rotates downward to compress the return torsion spring 114 and rotates a certain angle θ1. As the pedal 7 drives the rotating shaft 111 to rotate by an angle of θ1, it will drive the seat body 1312 fixed to it to rotate around the axis by an angle of θ1. The seat body 1312 rotates with the resetter, the locking push rod 1311, the limit pin 1316, and the elastic structure 1313 at the same time. Since the lock push rod 1311 contacts the protruding part of the guide path 1321 from the first position I (the initial position of the guide path 1321) to the third position III (the end position of the guide path 1321), the protruding part will apply pressure to the locking push rod 1311, prompting the locking push rod 1311 to move toward the resetter, moving to trigger the resetter to switch gears, and triggering the resetter to switch gears at the third position III. At this time, the resetter switches from the original holding gear to the release gear. At the same time, the locking push rod 1311 is not captured by the resetter (released). (release), at this time the operator releases the pedal 7, and the shaft 111 rotates in the opposite direction under the action of the return torsion spring 114. At the same time, the locking push rod 1311 extends toward the locking hole 13213 under the action of the elastic structure 1313. During the process, the locking push rod 1311 reaches the second position II (the position of the locking hole 13213), and the locking push rod 1311 is inserted into the locking hole 13213. At this time, the rotation angle of the pedal 7 is θ2 (from the end position of the guide path 1321 to the locking hole 13213), realizing the switching process of the caster 8 gear. Although the return torsion spring 114 is compressed to a certain angle and has a certain reverse force, since the locking push rod 1311 has been inserted into the locking hole 13213, its limiting effect offsets the reverse force of the return torsion spring 114, and the angle of the pedal 7 and the gear of the caster 8 at this time can be maintained. In the process of the operator stepping on the pedal 7 to actuate the gear of the caster 8, the actual rotation angle of the pedal 7 is θ=(θ1-θ2). Figure 11 The above describes the process of the operator stepping on the pedal 7 to switch gears for the first time.

[0102] Continue with the above process, such as Figure 11 As shown, the operator continues to step on the pedal 7, which continues to drive the corresponding pedal connecting block 115 and the rotating shaft 111 to rotate, and continues to compress the reset torsion spring 114. When the locking push rod 1311 moves to the third position III, the resetter is triggered to switch gears. The resetter gear switches from the original release to the hold gear, and the locking push rod 1311 is kept grasped. At this time, the operator releases the pedal 7. Since the locking push rod 1311 is held and grasped, it is a certain distance away from the locking hole 13213 and cannot be inserted and locked. Under the force of the reset torsion spring 114, it moves through the locking hole 13213 and returns to the original starting position, that is, the first position I, to achieve the re-switching of the caster 8 gear and return to the original state. The above describes the process of the operator stepping on the pedal 7 to switch gears again.

[0103] See also Figure 12 , which is a process diagram of the pedal 7 changing when the pedal 7 is stepped on. The first figure shows that the caster 8 is in the unlocked state. At this time, the pedal 7 is reset and the resetter is in the holding state; the second figure shows that the pedal 7 rotates from the first position I to the third position III. At this time, the resetter is in the released state; the third figure shows that the pedal 7 rotates from the third position III to the second position II. The caster 8 is in the locked state; the fourth figure shows that the pedal 7 is in the third position III. At this time, the resetter is in the holding state; the fifth figure shows that the pedal 7 is in the first position I. The caster 8 is in the unlocked state. At this time, the pedal 7 is reset and the resetter is in the holding state.

[0104] The central brake system 1 provided in this embodiment realizes the cyclic switching of the gear positions of the caster 8 by stepping on the pedal 7, which is labor-saving, efficient and easy to operate.

[0105] Regarding the structure of the transposition portion 133, in one embodiment, see Figure 13 The shifting portion 133 is arranged below the locking push rod 1311, and a limiting ring 13111 is provided on the side of the locking push rod 1311 close to the guide path 1321. A paddle 1334 is provided on the shifting portion 133. When the locking push rod 1311 moves from the locking hole 13213 to the end position of the guide path 1321, the limiting ring 13111 starts to push the paddle 1334 to rotate in the direction away from the guide path 1321, and then during the movement of the locking push rod 1311, the paddle 1334 can be separated from the limiting ring 13111 and the paddle 1334 is reset under the elastic force of the shifting portion 133 itself, so as to be located between the limiting ring 13111 and the fixing portion 132.

[0106] When the locking push rod 1311 is in the initial position, the pedal 7 is in the reset state; stepping on the pedal 7 causes the locking push rod 1311 to move along the front path 13211 to the locking hole 13213. At this time, when the pedal 7 is released, the pedal 7 is rotated at a certain angle; stepping on the pedal 7 again causes the locking push rod 1311 to disengage from the locking hole 13213 and move along the rear path 13212. As the protruding height of the rear path 13212 gradually increases, the limiting ring 13111 begins to push the paddle 1334 to rotate in the direction away from the guide path 1321. Then, during the movement of the locking push rod 1311, the paddle 1334 can disengage from the limiting ring 13111 and the paddle 1334 can be rotated in the direction away from the guide path 1321. The piece 1334 is reset under the action of the elastic force of the shifting part 133 itself, and the paddle 1334 is located between the limiting ring 13111 and the fixing part 132, so that when the pedal 7 is released again, the paddle 1334 blocks the limiting ring 13111 from moving into the locking hole 13212, and the limiting ring 13111 presses against the paddle 1334 and cannot reach the locking hole 13212. The locking push rod 1311 moves along the rear path 13212 to the initial position of the front path 13211. At this time, during the movement, the limiting ring 13111 is separated from the paddle 1334, and the locking push rod 1311 returns to the initial position under the action of the elastic structure 1313, and the pedal 7 is in a reset state.

[0107] The structure of the shifting portion 133 provided in this embodiment can achieve locking of the caster 8 by lightly stepping on the pedal 7, and unlocking of the caster 8 by further stepping on the pedal 7, which is easy to operate.

[0108] In one embodiment, see Figure 14 The shifting portion 133 further includes a shifting seat body 1331, a paddle shaft 1332, a paddle torsion spring 1333, and a paddle 1334. The paddle 1334 is fixed to the paddle shaft 1332, which is rotatably connected to the shifting seat body 1331. The paddle torsion spring 1333 is sleeved on the paddle shaft 1332 and acts on the shifting seat body 1331 and the paddle 1334. The shifting portion 133 has a simple structure and is easy to manufacture.

[0109] In the case where the fixing portions 132 of the two reset drive assemblies 13 are integrally arranged, in one embodiment, the transposition portions 133 of the two reset drive assemblies 13 can be arranged side by side and connected. Figure 13-15 , schematically shows two connected transposition parts 133 (referred to as the integral transposition part). A mounting slot is provided on the integral transposition part 133, and the integral fixing part 132 is inserted into the mounting slot and is detachably connected to the fixing part 132 via a connector.

[0110] In one embodiment, see Figure 15The top surface height of the paddle 1334 close to the locking hole 13213 is higher than the height of other positions on the top surface of the paddle 1334, so that when the locking push rod 1311 moves to the end position along the rear path 13212, the paddle 1334 can be separated from the limiting ring 13111, so that the paddle 1334 is reset under the elastic force of the paddle torsion spring 1333.

[0111] In the embodiment where the shifting portion 133 includes a paddle 1334 , the specific operation of the central brake system 1 is as follows:

[0112] like Figure 16 As shown, when the operator steps on the pedal 7, the rotation of the rotating shaft 111 by an angle θ3 causes the seat 1312 fixed thereto to rotate about the axis by an angle θ3. At this point, the locking push rod 1311 on the seat 1312 moves from the first position I to the second position II. Since the second position II is a locking hole 13213, the locking push rod 1311 is subjected to the elastic force of the elastic structure 1313 throughout the entire process. Therefore, after reaching the second position II, the locking push rod 1311 is inserted into the locking hole 13213. At this point, the operator releases their foot from the pedal 7. Although the return torsion spring 114 is compressed to a certain angle and exerts a certain reverse force, the locking push rod 1311, already inserted into the locking hole 13213, acts as a limiting force, offsetting the reverse force of the return torsion spring 114. This maintains the current angle of the pedal 7 and the gear position of the caster 8. The operator has now completed the gear shift of the caster 8 by stepping on the pedal 7.

[0113] Continue with the above process, such as Figure 16 As shown, the operator continues to step on the pedal 7, which continues to drive the corresponding pedal connecting block 115 and the rotating shaft 111 to rotate, and continues to compress the return torsion spring 114; at the same time, the rotation of the rotating shaft 111 drives the lever base 1312 to rotate, thereby driving the locking push rod 1311 to rotate around the axis. As the rear section path 13212 gradually protrudes, the protruding part squeezes the locking push rod 1311, forcing the locking push rod 1311 to move along the axis direction, and at the same time compresses the elastic structure 1313 installed on the locking push rod 1311. At this time, the locking push rod 1311 has two directions of movement, one is rotation along the rotating shaft 111, and the other is linear movement along its own axis direction. When the locking push rod 1311 moves to just contact with the paddle 1334, as shown in FIG. Figure 15, enabling paddle 1334 is in position a; still continuing to step on pedal 7, locking push rod 1311 continues to move along its own axis and rotate around rotation axis 111, locking push rod 1311 begins to squeeze paddle 1334, forcing paddle 1334 to rotate around paddle axis 1332, while paddle 1334 compresses paddle torsion spring 1333, until locking push rod 1311 moves to the point of being about to disengage from enabling paddle 1334, paddle 1334 is in position b, at which point paddle 1334 has rotated to a certain angle. At this point, stepping on pedal 7 again to the end position, paddle 1334 moves to completely disengage from locking push rod 1311, and immediately returns to position a under the torsion of paddle torsion spring 1333.

[0114] After the operator releases his foot, the torsion of the return torsion spring 114 drives the pedal connecting block 115 to rotate upward (opposite to the previous stepping rotation direction). At the same time, the seat body 1312 drives the locking push rod 1311 to move back along the guide path 1321. When the blocking plate 13114 contacts the end surface of the paddle 1334, since the paddle 1334 is in position a at this time, it can prevent the locking push rod 1311 from entering the locking hole 13213. Therefore, the locking push rod 1311 is blocked by the paddle 1334 when passing the second position II and cannot be locked. The return torsion spring 114 continues to act, driving the locking push rod 1311 to continue to move back. The limiting ring 13111 on the locking push rod 1311 is attached to the locking hole 13213 passed by the paddle 1334 until it is disengaged from the paddle 1334 and continues to press against the front path 13211 by relying on the action of the elastic structure 1313, thereby returning to the first position I. The above describes the process in which the operator steps on the pedal 7 again and releases the pedal 7 to switch the gear position of the caster 8 back to the initial state.

[0115] The central brake system 1 provided in this embodiment realizes the cyclic switching of the gear positions of the caster 8 by stepping on the pedal 7, which is labor-saving, efficient and easy to operate.

[0116] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A central braking system, characterized in that: include: A rotating shaft assembly (11) comprises a rotating shaft (111), a pedal connecting block (115), and a reset structure (117), wherein the pedal connecting block (115) is connected to the rotating shaft (111), and the reset structure is used for resetting the pedal connecting block (115); A connecting rod assembly (12), wherein the rotating shaft (111) and the caster (8) of the movable device are connected via the connecting rod assembly (12); The reset drive assembly (13) comprises a rotating portion (131), a fixed portion (132) and a transposition portion (133), wherein the rotating portion (131) is arranged on the rotating shaft (111), and the rotating portion (131) comprises a locking push rod (1311); a guide path (1321) is provided on the fixed portion (132), a locking hole (13213) is formed in the middle area of ​​the guide path (1321), and one end of the locking push rod (1311) is matched with the guide path (1321).

2. The central braking system according to claim 1, characterized in that: The rotating portion (131) further includes a seat body (1312) and an elastic structure (1313), wherein the locking push rod (1311) is arranged on the seat body (1312), and the elastic structure (1313) is arranged between the seat body (1312) and the locking push rod (1311), and the locking push rod (1311) abuts against the guide path (1321) under the action of the elastic structure (1313).

3. The central braking system according to claim 2, characterized in that: The transposition portion (133) is a resetter, and the transposition portion (133) is arranged on the seat body (1312) and is located on the side away from the fixed portion (132). One end of the locking push rod (1311) passes through the seat body (1312) and is connected to the transposition portion (133). The other end of the locking push rod (1311) is sleeved with the elastic structure (1313) and the other end of the locking push rod (1311) is in contact with the guide path.

4. The central braking system according to claim 2, characterized in that: The shifting portion (133) is arranged below the locking push rod (1311), and a limiting ring (13111) is arranged on the side of the locking push rod (1311) close to the guide path (1321); the shifting portion (133) also includes a shifting seat body (1331), a paddle shaft (1332), a paddle torsion spring (1333) and a paddle (1334), the paddle (1334) is fixed on the paddle shaft (1332), the paddle shaft (1332) is rotatably connected to the shifting seat body (1331), and the paddle torsion spring (1333) is sleeved on the paddle shaft (1332); the limiting ring (13111) cooperates with the paddle (1334).

5. The central braking system according to claim 4, characterized in that: The height of the top surface of the paddle (1334) on the side close to the locking hole (13213) is higher than the height of other positions on the top surface of the paddle (1334).

6. The central braking system according to any one of claims 2 to 5, characterized in that: A limiting pin shaft (1316) is also provided on the seat body (1312), and a guide groove (1322) is provided on the fixing portion (132), and the limiting pin shaft (1316) is inserted into the guide groove (1322).

7. The central braking system according to any one of claims 1 to 5, characterized in that: The locking push rod (1311) includes a main body (13112) and a head (13113), wherein the head (13113) is detachably connected to the main body (13112), and the free end of the head (13113) cooperates with the guide path (1321).

8. The central braking system according to any one of claims 1 to 5, characterized in that: The guide path (1321) includes a front path (13211) and a rear path (13212), wherein the front path (13211) and the rear path (13212) are connected; a locking hole (13213) is provided at the intersection of the rear path (13212) and the front path (13211), and the depth of the locking hole (13213) is greater than the depth of the front path (13211); the depth of the rear path (13212) gradually becomes shallower in a direction from approaching the locking hole (13213) to moving away from the locking hole (13213).

9. A movable device, characterized in that: It comprises a pedal (7), a caster (8) and a central brake system (1) as described in any one of claims 1 to 8, wherein the rotating shaft assembly (11) of the central brake system (1) is connected to the pedal (7), and the connecting rod assembly (12) of the central brake system (1) is connected to the caster (8).

10. The movable device according to claim 9, wherein: The number of the central brake systems (1) is one or more, and each central brake system (1) is connected to at least one pedal (7).

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