A lifting and suspension mechanism for the front wheel of a forklift
By designing the crank connecting rod mechanism and lifting cylinder system, the problem of the front wheel of the fork truck cannot maintain a horizontal state and poor lifting effect during the lifting of the fork rack is solved, and the reasonable lifting of the front wheel of the fork and the stable handling of the goods is achieved.
Patent Information
- Application Number
- CN202421391479.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-18
AI Technical Summary
The front wheels of the existing trucks cannot maintain a horizontal state during the lifting of the fork racks, and the lifting effect is poor, making it difficult for the trucks to enter and exit the empty pallets.
A crank connecting rod mechanism is designed to retract the piston rod of the oil cylinder through the crank mounting seat, which drives the crank mounting seat to move up and down on the fork rack. Combined with the linkage of the crank, connecting rod and force arm, the front wheel of the fork is controlled to leave the ground or land, ensuring that the plane on the fork is maintained horizontally during the lifting of the fork rack.
The reasonable lifting of the front wheel of the fork is achieved, ensuring the horizontal state of the fork plane during the lifting and lowering of the fork rack, and facilitating the handling of goods and the entry and exit of the pallets.
Smart Images
Figure CN222699957U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a mechanism, in particular to a front wheel lifting and suspension mechanism for a transport truck fork, and belongs to the field of transport truck forks. Background Art
[0002] The ordinary transport truck is supported on the ground by the driving wheel and the front wheel of the fork, so that the transport truck can run smoothly on the ground.
[0003] In some existing structures, the distance between the front wheel of the fork and the upper plane of the fork changes, and it is impossible to ensure that the upper plane of the fork remains horizontal during the lifting process of the fork frame. In addition, in some structures, the lifting effect of the front wheel of the fork is poor.
[0004] Some cargo pallets have cross bars at the bottom. When a truck fork wants to enter this type of pallet, the front wheel of the fork must first climb over the bottom cross bar. Since an empty pallet is lighter, the pallet is pushed and moved by the front wheel of the truck fork before the front wheel of the truck fork climbs over the bottom cross bar of the pallet, making it difficult for the truck to enter and exit the empty pallet.
[0005] In summary, it is particularly necessary to provide a structure with a reasonable design, good lifting effect of the front wheel of the forklift truck, and convenient mechanism control. Utility Model Content
[0006] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a transporter fork front wheel lifting suspension mechanism which has a reasonable and stable structural design, is safe and reliable, has a convenient crank-connecting rod mechanism to control, has a good fork front wheel lifting function, and meets the use requirements.
[0007] The technical solution adopted by the utility model to solve the above-mentioned problem is: the lifting and suspension mechanism of the front wheel of the fork of the transport truck includes a crank pressure wheel limit seat, a crank pressure wheel, a crank, a crank mounting seat and a crank pin, the crank is connected to the crank mounting seat through the crank pin, the crank pressure wheel is arranged on the crank, the crank pressure wheel is matched with the crank pressure wheel limit seat below, and is characterized in that it also includes a connecting rod, a force arm and a crank mounting seat lifting cylinder, one end of the connecting rod is connected to the crank, the other end of the connecting rod is connected to the force arm, and the crank mounting seat lifting cylinder is connected to the crank mounting seat.
[0008] Preferably, the crank of the utility model can rotate around the crank pin.
[0009] Preferably, the utility model further comprises left and right fork frame support wheels arranged at the rear of the fork frame.
[0010] Preferably, the crank mounting seat of the utility model is installed in a slide groove of the fork frame, and the crank mounting seat lifting cylinder is installed on the fork frame.
[0011] Preferably, the extension and retraction of the piston rod of the crank mounting seat lifting cylinder of the utility model drives the crank mounting seat to move up and down on the fork frame.
[0012] Preferably, the crank, connecting rod and lever arm of the utility model are linked to control the front wheel of the fork to leave the ground or touch the ground.
[0013] Compared with the prior art, the utility model has the following advantages and effects: (1) The overall structural design is reasonable, safe and reliable. Through the linkage of the connecting rod and the lever arm, the distance between the front wheel of the fork and the upper plane of the fork is changed, ensuring that the upper plane of the fork remains horizontal during the lifting and lowering process of the fork frame; (2) Through the extension and retraction of the piston rod of the crank mounting seat lifting cylinder, the crank mounting seat is driven to move up and down on the fork frame. Through the linkage of the crank, connecting rod and lever arm, the front wheel of the fork is controlled to leave the ground or touch the ground. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the crank-connecting rod structure of an embodiment of the utility model.
[0015] Figure 2 It is a structural schematic diagram of the fork frame at the lowest position when the embodiment of the utility model is used.
[0016] Figure 3 It is a structural schematic diagram of the fork frame when the embodiment of the utility model is in use and when it is lifted.
[0017] Figure 4 It is a schematic diagram of the overall structure of an embodiment of the utility model in which the front wheel of the fork is lifted off the ground.
[0018] Figure 5 It is a structural schematic diagram showing the lifting of the front wheel of the fork when the embodiment of the utility model is used.
[0019] In the figure: crank pressure wheel limiting seat 1, crank pressure wheel 2, crank 3, crank mounting seat 4, crank pin 5, connecting rod 6, force arm 7, fork front wheel 8, crank mounting seat lifting cylinder 9, fork frame supporting wheel 10, and driving wheel 11. DETAILED DESCRIPTION
[0020] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.
[0021] Example
[0022] See also Figures 1 to 5The lifting and suspension mechanism of the front wheel of the forklift of the transport truck in this embodiment includes a crank pressure wheel limiting seat 1, a crank pressure wheel 2, a crank 3, a crank mounting seat 4, a crank pin 5, a connecting rod 6, a force arm 7 and a crank mounting seat lifting cylinder 9. The crank 3 is connected to the crank mounting seat 4 through the crank pin 5, the crank pressure wheel 2 is arranged on the crank 3, the crank pressure wheel 2 is matched with the crank pressure wheel limiting seat 1 below, one end of the connecting rod 6 is connected to the crank 3, and the other end of the connecting rod 6 is connected to the force arm 7, and the crank mounting seat lifting cylinder 9 is connected to the crank mounting seat 4.
[0023] The distance between the fork front wheel 8 and the upper plane of the fork is controlled by a crank connecting rod mechanism, the basic principle of which is as follows: Figure 1 As shown:
[0024] The crank 3 is connected to the fork frame by a crank pin 5, and the crank 3 can rotate around the crank pin 5. When the fork frame moves vertically on the frame guide rail due to the movement of the lifting cylinder, the crank pin 5 also moves up and down. However, since the crank pressure wheel limit seat 1 is installed on the frame, the crank pressure wheel 2 can only move horizontally. The crank 3 will rotate around the crank pin 5. Through the linkage of the connecting rod 6 and the force arm 7, the distance between the front wheel 8 of the fork and the upper plane of the fork changes, ensuring that the upper plane of the fork remains horizontal during the lifting and lowering of the fork frame.
[0025] To solve the problem of "it is difficult for a truck to enter and exit an empty pallet", one method is to allow the front wheel of the fork to leave the ground, so that when the truck enters the pallet, the front wheel of the fork does not contact the cross bar at the bottom of the pallet, and the truck can easily enter and exit the empty pallet. However, the front wheel of the fork 8 is the support point of the whole vehicle. To make the front wheel of the fork leave the ground, the support point needs to be converted. At the same time, the change in the distance between the front wheel of the fork and the upper plane of the fork is linked to the up and down movement of the fork frame. How to change the distance between the front wheel of the fork 8 and the upper plane of the fork when the fork frame is not moving requires the addition of a new control mechanism to achieve.
[0026] The conversion of the support point is achieved by adding two left and right fork support wheels 10 at the rear of the fork frame. When the fork frame is raised, the rollers are not in contact with the ground. When the fork frame is lowered to the lowest position, the rollers are in contact with the ground, completing the conversion of the support point. Figure 2 , Figure 3 As shown, a fork front wheel 8, a fork frame support wheel 10 and a driving wheel 11 are provided.
[0027] The control principle of lifting the front wheel 8 of the fork off the ground is as follows: Figure 4 As shown:
[0028] The crank 3 is connected to the crank mounting seat 4 by a crank pin 5. The crank mounting seat 4 is installed in the slide groove of the fork frame. The crank mounting seat lifting cylinder 9 is installed on the fork frame. The crank mounting seat 4 is driven to move up and down on the fork frame through the extension and contraction of the piston rod of the crank mounting seat lifting cylinder 9. Through the linkage of the crank 3, the connecting rod 6 and the lever arm 7, the front wheel 8 of the fork is controlled to leave the ground or touch the ground.
[0029] Through the above description, those skilled in the art can already implement it.
[0030] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.
Claims
1. A lifting and suspension mechanism for a forklift truck, comprising a crank pressure wheel limit seat (1), a crank pressure wheel (2), a crank (3), a crank mounting seat (4) and a crank pin (5), wherein the crank (3) is connected to the crank mounting seat (4) via the crank pin (5), the crank pressure wheel (2) is arranged on the crank (3), and the crank pressure wheel (2) matches the crank pressure wheel limit seat (1) below, characterized in that: It also comprises a connecting rod (6), a force arm (7) and a crank mounting seat lifting cylinder (9), wherein one end of the connecting rod (6) is connected to the crank (3), the other end of the connecting rod (6) is connected to the force arm (7), and the crank mounting seat lifting cylinder (9) is connected to the crank mounting seat (4).
2. The lifting and suspension mechanism for the front wheel of the forklift of the transport vehicle according to claim 1 is characterized in that: The crank (3) can rotate around the crank pin (5).
3. The lifting and suspension mechanism for the front wheel of the forklift of the transport truck according to claim 1 is characterized in that: It also includes left and right fork frame support wheels (10) arranged at the rear of the fork frame.
4. The lifting and suspension mechanism for the front wheel of the forklift of the transport truck according to claim 1 is characterized in that: The crank mounting seat (4) is mounted in a slide groove of the fork frame, and the crank mounting seat lifting cylinder (9) is mounted on the fork frame.
5. The lifting and suspension mechanism for the front wheel of the forklift of the transport truck according to claim 1 is characterized in that: The extension and retraction of the piston rod of the crank mounting seat lifting cylinder (9) drives the crank mounting seat (4) to move up and down on the fork frame.
6. The lifting and suspension mechanism for the front wheel of the forklift of the transport truck according to claim 1 is characterized in that: The crank (3), the connecting rod (6) and the lever arm (7) are linked to control the front wheel of the fork to leave the ground or touch the ground.