Steering fixing device
By designing a steering and fixing device, the universal wheel is locked synchronously using a transmission rod and a locking rod, which solves the problem of inconvenience in operating the universal wheel alone in the existing technology, and achieves the effect of synchronous steering and fixing and stable locking.
Patent Information
- Application Number
- CN202520103320.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-01-15
AI Technical Summary
In existing technologies, it is difficult to switch the omnidirectional wheels on storage and transportation equipment such as handcarts to directional wheels at the same time. Each wheel needs to be operated individually, which is inconvenient and difficult to operate.
Design a steering and fixing device that uses a transmission rod, a locking rod, and a plate-like locking structure to drive the transmission rod to rotate, thereby achieving synchronous steering and fixing of two universal wheels. Springs and limiting components are used to improve stability, and a U-shaped structure and notch are used to maintain locking.
It enables simultaneous steering and fixation of both casters, improving operational convenience and stability. It eliminates the need to operate each caster individually, reducing operational difficulty and increasing efficiency.
Smart Images
Figure CN223590795U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of wheel structure of storage and transportation equipment, in particular to a steering fixing device. BACKGROUND
[0002] In order to steer in a small space, a handcart and other storage and transportation equipment with universal wheels are usually used. However, the actual road surface is not ideal, and the handcart with universal wheels is difficult to keep straight, so directional wheels are needed to avoid swinging when driving straight. In the existing scheme, a steering and directional device is designed on each wheel, but it needs to be operated separately, which is very inconvenient, so a device is needed to switch multiple universal wheels to directional wheels at the same time. CONTENT OF THE UTILITY MODEL
[0003] The purpose of the present application is to provide a steering fixing device for switching two universal wheels to directional wheels at the same time.
[0004] In order to achieve the above purpose, the present application provides a steering fixing device, which is installed at the bottom of a storage and transportation equipment with at least two universal wheels, the universal wheel includes a wheel frame and a tire, and the steering fixing device can include: a transmission rod; a foot pedal fixedly connected to the middle part of the transmission rod; at least two fixing parts fixed to the bottom of the storage and transportation equipment, and the transmission rod is rotatably connected to the fixing parts; two clamping rods, which are respectively arranged at both ends of the transmission rod and are perpendicular to the transmission rod; two sheet-shaped locking structures, which are respectively in contact with the two clamping rods, and the installation distance between the two sheet-shaped locking structures and the two universal wheels is equal; the middle part of the sheet-shaped locking structure is rotatably connected to the bottom of the storage and transportation equipment; wherein, when the foot pedal is stressed, it drives the transmission rod to rotate, so as to drive the two clamping rods to swing the sheet-shaped locking structures on both sides, and the two sheet-shaped locking structures are respectively matched with the wheel frames of the corresponding universal wheels to limit the steering of the universal wheels in the horizontal plane.
[0005] In an embodiment, a through hole is formed in the transmission rod, the clamping rod moves through the through hole, a spring is arranged on the clamping rod, one end of the spring is fixedly connected to the clamping rod, and the other end of the spring is in contact with the transmission rod, one end of the sheet-shaped locking structure is a U-shaped structure, and the other end is used for matching with the wheel frame of the universal wheel, and the spring is used for clamping the clamping rod into any corner of the U-shaped structure.
[0006] In another embodiment, the steering fixing device further includes a limiting part and a anti-dropping part;
[0007] The limiting part and the anti-dropping part are fixed to both ends of the clamping rod, the spring is sleeved on the clamping rod and compressed between the transmission rod and the limiting part, and the anti-dropping part is used to prevent the clamping rod from being pulled out of the through hole under the elastic force of the spring.
[0008] In yet another embodiment, a spring is provided between the transmission rod and the footrest.
[0009] In yet another embodiment, the transmission rod is a hollow metal pipe.
[0010] In one embodiment, the sheet-shaped locking structure is formed by welding two pieces of sheet metal, and each of the two pieces of sheet metal forms an end of the sheet-shaped locking structure.
[0011] In another embodiment, the footrest is a U-shaped metal pipe, and the U-shaped metal pipe is welded to the middle of the transmission rod.
[0012] In one embodiment, the length of the footrest is greater than the distance from the transmission rod to the edge of the storage and transportation device.
[0013] Compared with the prior art, the steering fixing device provided by the embodiments of the present application has the beneficial effects that:
[0014] In the steering fixing device provided by the embodiments of the present application, the footrest drives the transmission rod, and since the installation spacing of the two clamping rods on the transmission rod is equal to that of the two universal wheels, each clamping rod can drive the corresponding sheet-shaped locking structure to cooperate with the wheel frame of the corresponding universal wheel to simultaneously limit the steering of the universal wheel, and simultaneously clamping the steering means simultaneously turning the two universal wheels into directional wheels, thereby improving the convenience of locking the universal wheels and eliminating the need for separate operation of each universal wheel. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 FIG. 1 is a structural schematic diagram of a steering fixing device according to an embodiment of the present application.
[0016] Figure 2 FIG. 2 is a structural schematic diagram of a steering fixing device provided with a spring according to an embodiment of the present application.
[0017] Figure 3 FIG. 3 is a structural schematic diagram of a steering fixing device provided with a clamping structure according to an embodiment of the present application.
[0018] Figure 4 FIG. 4 is a structural schematic diagram of a steering fixing device provided with a gasket according to an embodiment of the present application.
[0019] Figure 5 FIG. 5 is a structural schematic diagram of a steering fixing device provided with a sheet-shaped locking structure according to an embodiment of the present application.
[0020] REFERENCE SIGNS:
[0021] 10. Steering fixing device; 101. Transmission rod; 1011. Through hole; 102. Foot pedal; 103. Fixing component; 104. Locking rod; 105. Plate-shaped locking structure; 1051. U-shaped structure; 1052. Notch; 106. Spring; 107. Limiting component; 108. Anti-detachment component; 109. Gasket; 20. Caster wheel; 201. Wheel frame; 202. Tire. Detailed Implementation
[0022] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application.
[0023] In the description of this application, it should be understood that the term "storage and transportation equipment" as used in this application can refer to any equipment equipped with two or more casters 20, such as handcarts, flatbed carts, electric carts, manual forklifts, shopping carts, transfer carts, etc., and this application does not impose any specific limitations.
[0024] like Figure 1 As shown in the preferred embodiment of this application, a steering and fixing device 10 is installed at the bottom of a storage and transportation device. The storage and transportation device has at least two casters 20, each caster 20 including a wheel frame 201 and a tire 202. The steering and fixing device 10 may include: a transmission rod 101, a foot pedal 102, at least two fixing members 103, two locking rods 104, and two plate-shaped locking structures 105.
[0025] The foot pedal 102 is fixedly connected to the middle of the transmission rod 101, and the fixing member 103 is fixed to the bottom of the storage and transportation equipment. The transmission rod 101 and the fixing member 103 are rotatably connected. Two locking rods 104 are respectively located at both ends of the transmission rod 101 and are perpendicular to the transmission rod 101. Two plate-shaped locking structures 105 are respectively abutted and connected to the two locking rods 104. The installation distance between the two plate-shaped locking structures 105 and the two universal wheels 20 is equal. The middle of the plate-shaped locking structure 105 is rotatably connected to the bottom of the storage and transportation equipment.
[0026] When the foot pedal 102 is subjected to force, it drives the transmission rod 101 to rotate, thereby driving the two locking rods 104 to swing the plate-shaped locking structures 105 on both sides. The two plate-shaped locking structures 105 respectively cooperate with the wheel frame 201 of the corresponding omnidirectional wheel 20 to restrict the omnidirectional wheel 20 from turning on the horizontal plane.
[0027] Through the above scheme, the transmission of power is realized by the transmission rod 101, the clamping rod 104 and the sheet-shaped locking structure 105, and then the movement of the two sheet-shaped locking structures 105 can be driven at the same time by one foot pedal. Since the installation spacing is equal to the wheel spacing of the universal wheel 20, the steering of the two universal wheels 20 can be locked at one time, that is, the two universal wheels 20 are turned into directional wheels, and there is no need to bend down to adjust each universal wheel 20 separately, thereby improving the use efficiency.
[0028] It can be understood that the universal wheel 20 can be two universal wheels 20 installed on any side of the storage and transportation equipment. If the two universal wheels 20 on the front side or the rear side are locked at the same time, it is convenient to travel straight in the original direction. If the two universal wheels 20 on the left side or the right side are locked at the same time, it is convenient to travel straight to the left side or the right side.
[0029] In the above scheme, the cooperation between the sheet-shaped locking structure 105 and the wheel carrier 201 of the universal wheel 20 can be any one of the following: friction fit, clamping fit, and limit fit.
[0030] Among them, the friction fit is to realize the orientation of the universal wheel 20 by relying on the friction between the sheet-shaped locking structure 105 and the wheel carrier 201. The clamping fit can set a protrusion on the sheet-shaped locking structure 105 and a groove on the corresponding position of the wheel carrier 201 to realize the orientation of the universal wheel 20.
[0031] If the limit fit is used, as shown in Figure 5 , an exemplary limit fit is given. The notch 1052 can be provided on the sheet-shaped locking structure 105. Since the wheel carrier 201 has a corner, the notch 1052 on the sheet-shaped locking structure 105 can clamp the corner of the wheel carrier 201 to limit the steering of the universal wheel 20 on the horizontal plane. Since the cooperation between the notch 1052 and the corner has a multi-directional limiting effect, it is a preferred embodiment of the present application.
[0032] Further, the present application is suitable for storage and transportation equipment equipped with two or more universal wheels 20. For example, 2 directional 2 universal, 4 universal, 4 directional 2 universal and other combinations. The storage and transportation equipment contains two or more pairs of universal wheels 20.
[0033] In the above embodiment, the clamping rod 104 can directly drive the sheet-shaped locking structure 105 to lock the rotation of the universal wheel 20 in the horizontal direction.
[0034] Direct driving can use common connection methods such as welding, abutting, and sleeving, which will not be described here.
[0035] However, the above scheme is difficult to maintain the locked state on the bumpy road surface due to the up and down vibration. Therefore, in another embodiment of the present application, as shown in Figure 2 and3 As shown, a through hole 1011 is formed on the transmission rod 101, the clamping rod moves through the through hole, the clamping rod 104 is further provided with a spring 106, one end of the spring 106 is fixedly connected with the clamping rod 104, the other end of the spring 106 is abuttingly connected with the transmission rod 101, one end of the sheet-shaped locking structure 105 is a U-shaped structure 1051, the other end is used for cooperating with the wheel frame 201 of the universal wheel 20, the spring 106 is used for clamping the clamping rod 104 into any corner of the U-shaped structure 1051.
[0036] Through the above scheme, the continuous output elastic force characteristics of the spring 106 are ingeniously utilized, and two dead angles are formed by cooperating with the two corners of the U-shaped structure 1051, so that the sheet-shaped locking structure 105 can be kept in the locked or unlocked position when jolting.
[0037] The locking stability is increased, and the probability of being suddenly locked when needing to be universally steered is reduced, so that the use state is more in line with the needs of the user.
[0038] It can be understood that, in an embodiment, in order to reasonably utilize the elastic force of the spring 106, one end of the spring 106 can be welded with the clamping rod 104, and the other end can be abuttingly arranged on the transmission rod 101.
[0039] In another embodiment of the present application, as shown in the drawings, Figure 3 The steering fixing device 10 can further include a limiting piece 107 and a anti-falling piece 108. Meanwhile, a through hole 1011 is formed on the transmission rod 101, the clamping rod 104 moves through the through hole 1011, the limiting piece 107 and the anti-falling piece 108 are fixed on both ends of the clamping rod 104, the spring 106 is sleeved on the clamping rod 104 and compressed between the transmission rod 101 and the limiting piece 107, and the anti-falling piece 108 is used for preventing the limiting rod from falling out of the through hole 1011 under the elastic force of the spring 106.
[0040] The application of the elastic force of the spring 106 is realized by the limiting piece 107 and the transmission rod 101 itself, the spring 106 is used as a replaceable part to increase the service life, and the anti-falling piece 108 is used to avoid the clamping rod 104 from falling out of the through hole 1011 when the clamping rod 104 accidentally separates from the U-shaped structure 1051.
[0041] In still another embodiment of the present application, as shown in the drawings, Figure 4 A gasket 109 is arranged between the spring 106 and the transmission rod 101. The gasket 109 buffers the pressure of the spring 106 on the transmission rod 101, and reduces the abrasion. Meanwhile, the gasket 109 can better keep the clamping rod 104 in the central region of the spring 106, so that the elastic force is more evenly distributed.
[0042] In any embodiment of the present application, the transmission rod 101 can be a hollow metal pipe. The hollow structure greatly reduces the weight and cost of the transmission rod 101 while ensuring a certain strength and rigidity. At the same time, the hollow structure provides stronger bending resistance and will not be severely bent during multiple rotations of the footrest 102.
[0043] In an embodiment, the sheet-shaped locking structure 105 is formed by welding two sheet metal parts, each of which constitutes an end of the sheet-shaped locking structure 105. Compared with machining a whole piece of metal, using sheet metal parts for assembly can greatly reduce production costs, and since the sheet-shaped locking structure 105 is used for locking the steering, it does not need to be used for weighing, so using sheet metal parts can also meet the strength requirements of use.
[0044] In another embodiment, the footrest 102 is a U-shaped metal pipe, which is welded to the middle part of the transmission rod 101. The use of a U-shaped metal pipe with low self-weight not only further reduces the weight of the entire device, making the trolley more flexible during operation, but also has good structural stability. The unique U-shaped design can better withstand forces from different directions and is not easily deformed during user pedaling.
[0045] The welded connection between the U-shaped metal pipe and the transmission rod 101 also ensures a firm combination between the two, which will not loosen or fall off during long-term use, thereby ensuring the reliability and durability of the device.
[0046] In an embodiment of the present application, the length of the footrest 102 is greater than the distance from the transmission rod 101 to the edge of the storage and transportation equipment.
[0047] Through the above scheme, the length of the footrest 102 is greater than the distance from the transmission rod 101 to the edge of the storage and transportation equipment (i.e., the distance from the root of the footrest 102 to the edge of the storage and transportation equipment), so the footrest 102 can extend out of the bottom of the storage and transportation equipment, making the footrest 102 more likely to be pedaled. With this structure, there is no need to reserve a footrest space at the bottom of the storage and transportation equipment, so it is suitable for storage and transportation equipment of various heights.
[0048] It can be understood that the storage and transportation equipment using the steering fixing device 10 in the present application falls within the protection scope of the present application.
[0049] Correspondingly, the present application provides a storage and transportation equipment, which can include: at least two universal wheels 20 and the steering fixing device 10 in any of the above embodiments, and the universal wheel 20 includes a wheel frame and a tire.
[0050] In summary, the embodiment of the application provides a steering fixing device 10, two clamping rods 104 and two universal wheels 20 have equal mounting spacing, and a designed transmission structure is used to clamp the steering shaft at the same time, that is, to convert the two universal wheels 20 into directional wheels at the same time, thereby improving the convenience of locking the universal wheels 20, and without the need for separate operation of each universal wheel 20, the pedal operation is safe and labor-saving.
[0051] The above is only the preferred embodiment of the application, and it should be pointed out that, for ordinary skilled persons in the technical field, several improvements and replacements can be made without departing from the technical principles of the application, and these improvements and replacements should also be considered as the protection scope of the application.
Claims
1. A steering fixing device (10), characterized in that, The steering fixing device (10) is installed at the bottom of a storage and transportation device with at least two casters (20), each caster (20) comprising a wheel frame (201) and a tire (202), and the steering fixing device (10) comprising: Transmission rod (101); A foot pedal (102) is fixedly connected to the middle part of the transmission rod (101); At least two fasteners (103) are fixed to the bottom of the storage and transportation equipment, and the transmission rod (101) is rotatably connected to the fasteners (103); Two locking rods (104) are respectively located at both ends of the transmission rod (101) and are perpendicular to the transmission rod (101); Two plate-shaped locking structures (105) are connected to two locking rods (104) respectively, and the installation distance between the two plate-shaped locking structures (105) and the two casters (20) is equal; the middle part of the plate-shaped locking structure (105) is rotatably connected to the bottom of the storage and transportation equipment. When the foot pedal (102) is subjected to force, it drives the transmission rod (101) to rotate, thereby driving the two locking rods (104) to swing. The two plate-shaped locking structures (105) on both sides cooperate with the wheel frame (201) of the corresponding universal wheel (20).
2. The steering fixing device (10) according to claim 1, characterized in that, The transmission rod (101) has a through hole (1011), and the locking rod (104) moves through the through hole (1011). The locking rod (104) is provided with a spring (106), one end of the spring (106) is fixedly connected to the locking rod (104), and the other end of the spring (106) is in contact with the transmission rod. One end of the plate-shaped locking structure (105) is a U-shaped structure (1051), and the other end is used to cooperate with the wheel frame (201) of the universal wheel (20). The spring (106) is used to lock the locking rod (104) into any corner of the U-shaped structure (1051).
3. The steering fixing device (10) according to claim 2, characterized in that, The steering fixing device (10) also includes a limiting member (107) and an anti-detachment member (108); The limiting member (107) and the anti-detachment member (108) are fixed to both ends of the locking rod (104). The spring (106) is sleeved on the locking rod (104) and compressed between the transmission rod (101) and the limiting member (107). The anti-detachment member (108) is used to prevent the locking rod (104) from dislodging from the through hole (1011) under the elastic force of the spring (106).
4. The steering fixing device (10) according to claim 3, characterized in that, A washer (109) is provided between the spring (106) and the transmission rod (101).
5. The steering fixing device (10) according to claim 1, characterized in that, The transmission rod (101) is a hollow metal tube.
6. The steering fixing device (10) according to claim 1, characterized in that, The sheet-like locking structure (105) is welded together from two sheet metal parts, each of which forms the end of the sheet-like locking structure (105).
7. The steering fixing device (10) according to claim 1, characterized in that, The foot pedal (102) is a U-shaped metal tube, which is welded to the middle of the transmission rod (101).
8. The steering fixing device (10) according to claim 1, characterized in that, The length of the foot pedal (102) is greater than the distance from the transmission rod (101) to the edge of the storage and transportation equipment.