Handcart steering mechanism
By designing the steering mechanism of the trolley, the direction control of the trolley is achieved by using the combination of universal wheels and connecting rod mechanisms, the problem of difficult to control the direction of the existing trolley universal wheels is solved, and the convenience of operation and smooth operation are improved.
Patent Information
- Application Number
- CN202420547554.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-20
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-03-20
AI Technical Summary
The universal wheels of existing trolleys are difficult to control the direction during driving, resulting in difficulty in operating and difficult to control the forward or backward direction.
A trolley steering mechanism is designed, and the first connecting rod mechanism and the second connecting rod mechanism are connected by the first and second sets of universal wheels, and the locking and release of the connecting rod mechanism is controlled by adjustable first bolts and second bolts, so as to realize the synchronous steering and direction fixation of the universal wheel.
The trolley steering mechanism improves the trolley's direction control ability, which is simple to operate, smoothly run, low cost and high efficiency, and solves the problem that the universal wheel is difficult to control the direction.
Smart Images
Figure CN222646031U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a trolley, in particular to a steering mechanism of the trolley. Background Art
[0002] The structure of the trolley mainly includes the frame of the trolley, four universal wheels and other parts. The universal wheel is a caster installed at the bottom of the frame and can rotate 360 degrees on the ground. When the trolley is loaded with heavy objects, the four universal wheels have no structure to control the direction during driving, which makes manual operation difficult and may cause the trolley to be difficult to control the direction (for example, it is difficult to control the forward and backward directions). Utility Model Content
[0003] In view of this, the utility model proposes a steering mechanism for a trolley, which can overcome the defect in the prior art that the direction is difficult to control during the driving process of the universal wheels.
[0004] The trolley steering mechanism according to the present application includes: a first group of universal wheels, which are arranged at the first end of the trolley, and each universal wheel in the first group of universal wheels is connected by a first connecting rod mechanism to achieve synchronous steering; a second group of universal wheels, which are arranged at the second end of the trolley, and each universal wheel in the second group of universal wheels is connected by a second connecting rod mechanism to achieve synchronous steering; a first bolt, which is used to operate the first connecting rod mechanism, and has a first bolt locking position for locking the first connecting rod mechanism and a first bolt releasing position for releasing the first connecting rod mechanism; and a second bolt, which is used to operate the second connecting rod mechanism, and has a first bolt locking position for locking the second connecting rod mechanism and a first bolt releasing position for releasing the second connecting rod mechanism.
[0005] Furthermore, the first group of universal wheels and the second group of universal wheels each include two universal wheels; the first connecting rod mechanism and the second connecting rod mechanism are both four-bar mechanisms, the four-bar mechanism includes a connecting rod, and the two ends of the connecting rod are respectively connected to the wheel frames of the two universal wheels in the corresponding first group of universal wheels or the second group of universal wheels through two connecting pins; the projections of the two connecting pins and the steering spindles of the two universal wheels in the top-down plane are located at the four vertices of the parallelogram.
[0006] Furthermore, the trolley steering mechanism includes a first stopper corresponding to the first bolt and a second stopper corresponding to the second bolt. The first bolt and the second bolt pass through corresponding connecting rods respectively. By screwing the first bolt and the second bolt, one end of the first bolt abuts against the stopper and one end of the second bolt abuts against the second stopper, thereby fixing the direction of the universal wheel.
[0007] Furthermore, the wheel frame of the universal wheel includes a protrusion protruding outward from the edge, and both ends of the protrusion and the connecting rod are provided with axial holes, and the connecting pin shaft is inserted into the axial hole for connecting the connecting rod and the wheel frame.
[0008] Further, the protrusion is formed separately from the wheel frame and is fixed to the wheel frame by a connecting member.
[0009] Further, the middle portion of the connecting rod has a threaded hole, and the first bolt and the second bolt are respectively screwed through the threaded hole to abut against the first stopper and the second stopper respectively.
[0010] Furthermore, the middle portion of the connecting rod has a through hole and a sleeve with a threaded hole, and the first bolt and the second bolt pass through the through hole and the threaded hole to be screwed.
[0011] Further, the end of the first bolt abutting against the first stopper and the end of the second bolt abutting against the second stopper have a spherical shape.
[0012] Further, the end of the first bolt abutting the first stopper is provided with a first bushing, the end of the second bolt abutting the second stopper is provided with a second bushing, and the spherical member abutting the first stopper and the second stopper is received in the first bushing and the second bushing.
[0013] The trolley steering mechanism of the utility model utilizes a parallelogram structure and cooperates with a universal wheel to form a wheel system, and can change the control direction of the trolley by controlling an adjustable first bolt and a second bolt. The trolley steering technology improves the overall structure, is simple and convenient to operate, runs smoothly, has low cost and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0015] Figure 1 It is a three-dimensional view of a trolley having a trolley steering mechanism according to one embodiment of the present application.
[0016] Figure 2 for Figure 1 Bottom perspective view of the trolley.
[0017] Figure 3 for Figure 1 Front view of the trolley.
[0018] Figure 4 for Figure 1 Bottom view of the cart.
[0019] Figure 5 for Figure 1 View of a hand truck.
[0020] The reference numerals are as follows:
[0021] A. The first set of universal wheels
[0022] B. The second set of universal wheels
[0023] C. The first link mechanism
[0024] D. Second connecting rod mechanism
[0025] T, Steering spindle
[0026] 1. Trolley
[0027] 2. Universal wheel
[0028] 10. Trolley steering mechanism
[0029] 11. Connecting rod
[0030] 12. First stop
[0031] 13. First Bolt
[0032] 14. Second bolt
[0033] 15. Second stopper
[0034] 16. First bushing
[0035] 17. Sleeve
[0036] 18. Second bushing
[0037] 19. Spherical parts
[0038] 21. Wheel frame
[0039] 22. Protrusion
[0040] 23. Connecting pin DETAILED DESCRIPTION
[0041] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail with reference to the following embodiments.
[0042] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0044] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0045] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art, and in the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.
[0046] like Figures 1 to 5 As shown, a trolley steering mechanism 10 according to an embodiment of the present application includes: a first group of universal wheels A, which is arranged at a first end of the trolley 1, and each universal wheel 2 in the first group of universal wheels A is connected by a first connecting rod mechanism C to achieve synchronous steering; a second group of universal wheels B, which is arranged at a second end of the trolley 1, and each universal wheel 2 in the second group of universal wheels B is connected by a second connecting rod mechanism D to achieve synchronous steering; a first bolt 13, which is used to operate the first connecting rod mechanism C, and has a first bolt locking position for locking the first connecting rod mechanism C and a first bolt releasing position for releasing the first connecting rod mechanism C; and a second bolt 14, which is used to operate the second connecting rod mechanism D, and has a first bolt locking position for locking the second connecting rod mechanism D and a first bolt releasing position for releasing the second connecting rod mechanism D.
[0047] The first connecting rod mechanism C is locked at the first bolt locking position by the first bolt 13, so that the first set of universal wheels A becomes a fixed wheel set. Alternatively, the second connecting rod mechanism D is locked at the first bolt locking position by the second bolt 14, so that the second set of universal wheels B becomes a fixed wheel set. One of the first set of universal wheels A and the second set of universal wheels B is set as a fixed wheel set, and the other set of universal wheels is still a universal wheel set, so that the forward or backward direction can be more easily controlled during the movement of the trolley 1.
[0048] like Figure 2 and Figure 3 As shown, the first set of universal wheels A and the second set of universal wheels B each include two universal wheels 2. The first link mechanism C and the second link mechanism D are both four-bar linkages. The four-bar linkage includes a link 11, and the two ends of the link 11 are respectively connected to the wheel frames 21 of the two universal wheels 2 in the first set of universal wheels A or the second set of universal wheels B through two connecting pins 23. The two connecting pins 23 are connected to the steering spindles T (such as Figure 5 The projection of the universal wheel 2 in the top view plane is located at the four vertices of the parallelogram. The steering axis T is perpendicular to the ground, and the universal wheel 2 can rotate 360 degrees around the steering axis T.
[0049] The connecting rod mechanism with a parallelogram structure realizes the simultaneous control of two universal wheels in the same set of universal wheels, making them directional wheels, with a simple structure and convenient operation.
[0050] According to one embodiment of the present application, the trolley steering mechanism 10 includes a first stopper 12 corresponding to the first bolt 13 and a second stopper 15 corresponding to the second bolt. The first bolt 13 and the second bolt 14 pass through the corresponding connecting rod 11 respectively. By screwing the first bolt 13 and the second bolt 14, one end of the first bolt 13 abuts against the first stopper 12, and one end of the second bolt 14 abuts against the second stopper 15, thereby fixing the direction of the universal wheel 2. Obviously, a threaded hole corresponding to the first bolt 13 or the second bolt 14 is provided on the connecting rod 11 to cooperate with the first bolt 13 or the second bolt 14. The first stopper 12 and the second stopper 15 can be fixedly arranged at the bottom of the frame of the trolley 1 to face the first bolt 13 or the second bolt 14. The direction of the universal wheel 2 is fixed by simply abutting and matching between the bolt and the stopper.
[0051] The wheel frame 21 of the universal wheel 2 includes a protrusion 22 protruding outward from the edge. Both ends of the protrusion 22 and the connecting rod 11 are provided with axial holes. The connecting pin 23 is inserted into the axial hole for connecting the connecting rod 11 and the wheel frame 21.
[0052] The protrusion 22 is formed separately from the wheel frame 21 and is fixed to the wheel frame 21 by a connecting member. In addition, the protrusion 22 may also be formed as a part of the wheel frame 21.
[0053] According to one embodiment of the present application, the middle portion of the connecting rod 11 has a threaded hole, and the first bolt 13 and the second bolt 14 are respectively screwed through the threaded holes to abut against the first stopper 12 and the second stopper 15 . In this embodiment, the threaded hole is formed in the connecting rod 11 .
[0054] According to another embodiment of the present application, the middle portion of the connecting rod 11 has a through hole and a sleeve 17 with a threaded hole, such as Figure 2 and Figure 4 As shown, the first bolt 13 and the second bolt 14 are screwed through the through hole and the threaded hole of the sleeve 17. In this embodiment, the connecting rod 11 has only a through hole, and the threaded hole is formed in the sleeve 17, so that only the threads need to be processed in the sleeve 17 which is easier to process, thereby reducing the manufacturing cost.
[0055] The end of the first bolt 13 abutting against the first stopper 12 and the end of the second bolt 14 abutting against the second stopper 15 have a spherical shape. Of course, the ends of the first bolt 13 and the second bolt 14 can also have other shapes, such as a plane shape, an arc shape, etc.
[0056] like Figure 4 As shown, the end of the first bolt 13 abutting against the first stopper 12 is provided with a first bushing 16, and the end of the second bolt 14 abutting against the second stopper 15 is provided with a second bushing 18, and a spherical member 19 for abutting against the first stopper 12 and the second stopper 15 is received in the first bushing 16 and the second bushing 18. The spherical member 19 abuts against the first stopper 12 and the second stopper 15, so that the abutment is more stable, and the structure is simple and easy to process.
[0057] According to the technical solution of the present application, the universal wheel set is divided into a first set of universal wheels A and a second set of universal wheels B. The first set of universal wheels A can be set in front of the pushing direction of the trolley 1, and the second set of universal wheels B can be set in the rear of the pushing direction. After the trolley 1 is loaded with goods, when it is pushed forward, the first bolt 13 is loosened, the first connecting rod mechanism C can swing arbitrarily, and the first set of universal wheels A is used as a universal wheel; the second bolt 14 is tightened to the second stopper 15, the parallelogram structure of the second connecting rod mechanism D becomes a rectangle, and the second set of universal wheels B is used as a directional wheel. The first set of universal wheels A controls the direction, and the trolley runs smoothly.
[0058] When moving backward, tighten the first bolt 13 to the first stopper 12, the parallelogram structure of the first link mechanism C becomes a rectangle, and the first set of universal wheels A is used as a directional wheel; loosen the second bolt 14 from the second stopper 15, the parallelogram structure of the second link mechanism D can swing arbitrarily, and the second set of universal wheels B is used as a fully directional wheel. The second set of universal wheels B controls the direction, and the trolley runs smoothly.
[0059] Therefore, the present application utilizes the parallelogram structure in combination with the universal wheel improvement, which has low overall cost and good performance. In addition, the steering mechanism is easy and convenient to operate manually, which is beneficial to the transportation of workshop products and improves efficiency.
[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.
[0061] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of this application.
[0062] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0063] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A trolley steering mechanism, characterized in that: The cart steering mechanism (10) comprises: A first set of universal wheels (A) is arranged at a first end of the trolley (1), wherein the universal wheels (2) in the first set of universal wheels (A) are connected via a first connecting rod mechanism (C) to achieve synchronous steering; A second set of universal wheels (B) is arranged at the second end of the trolley (1), and the universal wheels (2) in the second set of universal wheels (B) are connected via a second connecting rod mechanism (D) to achieve synchronous steering; a first bolt (13) for operating the first link mechanism (C), having a first bolt locking position for locking the first link mechanism (C) and a first bolt releasing position for releasing the first link mechanism (C); and A second bolt (14) is used to operate the second link mechanism (D), and has a first bolt locking position for locking the second link mechanism (D) and a first bolt releasing position for releasing the second link mechanism (D).
2. The trolley steering mechanism according to claim 1, characterized in that: The first set of universal wheels (A) and the second set of universal wheels (B) each include two universal wheels (2); The first link mechanism (C) and the second link mechanism (D) are both four-link mechanisms, and the four-link mechanism comprises a link (11), and two ends of the link (11) are respectively connected to the wheel frames (21) of the two universal wheels (2) in the corresponding first set of universal wheels (A) or the second set of universal wheels (B) through two connecting pins (23); The projections of the two connecting pins (23) and the steering spindles (T) of the two universal wheels (2) of the first set of universal wheels (A) or the steering spindles (T) of the two universal wheels (2) of the second set of universal wheels (B) in the top view plane are located at the four vertices of the parallelogram.
3. The trolley steering mechanism according to claim 2, characterized in that: The trolley steering mechanism comprises a first stopper (12) corresponding to the first bolt (13) and a second stopper (15) corresponding to the second bolt. The first bolt (13) and the second bolt (14) respectively pass through corresponding connecting rods (11). By screwing the first bolt (13) and the second bolt (14), one end of the first bolt (13) abuts against the first stopper (12), thereby fixing the direction of the universal wheel (2) of the first group of universal wheels (A), or one end of the second bolt (14) abuts against the second stopper (15), thereby fixing the direction of the universal wheel (2) of the second group of universal wheels (B).
4. The trolley steering mechanism according to claim 3, characterized in that: The wheel frame (21) of the universal wheel (2) of the first group of universal wheels (A) or the wheel frame (21) of the universal wheel (2) of the second group of universal wheels (B) comprises a protrusion (22) protruding outward from an edge, and both ends of the protrusion (22) and the connecting rod (11) are provided with axial holes, and the connecting pin shaft (23) is inserted into the axial hole for connecting the connecting rod (11) and the wheel frame (21).
5. The trolley steering mechanism according to claim 4, characterized in that: The protrusion (22) is formed separately from the wheel frame (21) and is fixed to the wheel frame (21) via a connecting member.
6. The trolley steering mechanism according to claim 3, characterized in that: The middle portion of the connecting rod (11) has a threaded hole, and the first bolt (13) and the second bolt (14) are respectively screwed through the threaded holes to abut against the first stopper (12) and the second stopper (15) respectively.
7. The trolley steering mechanism according to claim 3, characterized in that: The middle part of the connecting rod (11) has a through hole and a sleeve (17) with a threaded hole, and the first bolt (13) and the second bolt (14) pass through the through hole and the threaded hole to be screwed.
8. The trolley steering mechanism according to claim 3, characterized in that: The end of the first bolt (13) abutting against the first stopper (12) and the end of the second bolt (14) abutting against the second stopper (15) have a spherical shape.
9. The trolley steering mechanism according to claim 3, characterized in that: The end of the first bolt (13) abutting against the first stopper (12) is provided with a first bushing (16), and the end of the second bolt (14) abutting against the second stopper (15) is provided with a second bushing (18), and a spherical member (19) for abutting against the first stopper (12) and the second stopper (15) is received in the first bushing (16) and the second bushing (18).