Forklift pallet detection mechanism

Abstract

The utility model relates to the technical field of pallet detection, and specifically discloses a forklift pallet detection mechanism, which comprises a contact plate, an elastic support member and an induction member, the upper end of the contact plate is rotatably fixed on the front side surface of a frame, the elastic support member is movably fixed on the front side surface of the frame and can abut against the inner side of the lower end of the contact plate, and the induction member is fixed on the upper end of the contact plate. The sensing piece comprises a first sensing unit fixed on the inner side of the lower end of the contact plate and a second sensing unit fixed in the frame, when the tray moves to be attached to the frame, the elastic supporting piece can be extruded through the contact plate, the contact plate is attached to the front side face of the frame, the first sensing unit makes contact with the second sensing unit, and the tray can move to the front side face of the frame. And the abutting position of the elastic supporting piece and the contact plate can be adjusted by moving the elastic supporting piece up and down, then the elastic force applied to the contact plate by the elastic supporting piece can be adjusted, and the applicability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of pallet detection, in particular to a forklift pallet detection mechanism. Background Art

[0002] AGV forklift is an unmanned automatic transport vehicle. Due to its high degree of automation, it is widely used in factories, warehouses, logistics centers and other places. During the transportation process, the forklift may place a pallet on the fork and use the pallet to transport small objects. However, after the pallet is loaded with goods, it cannot accurately determine the position of the pallet due to unmanned driving, which poses a safety risk. Therefore, the pallet detection mechanism is generated.

[0003] Existing tray detection mechanisms all include a touch plate and an elastic member, which uses the elastic member to provide elastic support for the touch plate. When the tray squeezes the touch plate, the elastic force can be overcome so that the touch plate abuts against the sensing switch to detect the position of the tray. However, in the prior art, the elastic force is determined by the material of the elastic member and cannot be adjusted. Therefore, the force applied by the tray must be greater than the elastic force, which results in poor adaptability in different occasions. Summary of the invention

[0004] The present invention is made in consideration of the above-mentioned problems, and the purpose of the present invention is to provide a forklift pallet detection mechanism, which can adjust the elastic force of the elastic support member, improve its applicability, and ensure the detection accuracy.

[0005] To achieve the above object, the utility model provides a forklift pallet detection mechanism, the forklift comprises a frame and a fork mechanism, the fork mechanism comprises a fork and a pallet located on the fork, the fork is located on the front side of the frame, the pallet has a first station away from the frame and a second station with an end portion attached to the front side of the frame, the detection mechanism comprises:

[0006] A contact plate, the upper end of which is rotatably fixed to the front side of the frame;

[0007] an elastic support member, which is movably fixed to the front side of the frame and abuts against the inner side of the lower end of the contact plate to drive the lower end of the contact plate away from the front side of the frame;

[0008] The sensing member includes a first sensing unit fixed on the inner side of the lower end of the contact plate and a second sensing unit fixed in the frame. When the tray moves to the second station, the tray can squeeze the elastic support member through the contact plate, and the first sensing unit can be connected to the second sensing unit.

[0009] According to the forklift pallet detection mechanism described above, the elastic support member includes at least two groups of spring leaf groups, which are respectively located on two symmetrical sides of the front side of the frame and respectively abut against two sides of the lower end of the contact plate.

[0010] According to the forklift pallet detection mechanism described above, each group of the spring sheet groups includes at least one spring sheet, and the spring sheet includes a connecting portion and a supporting portion. The connecting portion is fixed to the frame by a positioning bolt, and the connecting portion is provided with a positioning groove arranged in the up and down direction, and one end of the positioning bolt passes through the positioning groove and is connected to the frame.

[0011] According to the forklift pallet detection mechanism described above, it also includes an adapter, which includes a rotating shaft seat and a rotating shaft. The rotating shaft seat can be detachably fixed on the frame, and the rotating shaft can be rotatably inserted into the rotating shaft seat, and both ends of the rotating shaft are connected to the upper end of the contact plate.

[0012] According to the forklift pallet detection mechanism described above, a mounting groove is provided at the upper end of the contact plate, the rotating shaft is arranged in the mounting groove along the horizontal direction and connected to the two side walls opposite to the mounting groove, and both the rotating shaft seats can pass through the mounting groove and connect to the frame.

[0013] According to the forklift pallet detection mechanism described above, a U-shaped groove is provided on the inner side of the rotating shaft seat, and the rotating shaft can be inserted into the U-shaped groove.

[0014] According to the forklift pallet detection mechanism described above, the first sensing unit is set as a sensing sheet, the second sensing unit is set as a sensing switch, the two sensing sheets are symmetrically distributed on both sides of the contact plate, and the two sensing switches are symmetrically arranged on both sides of the front side of the frame and correspond one to one with the sensing sheets.

[0015] The utility model has the following beneficial effects:

[0016] 1. The contact position between the spring and the contact plate can be adjusted by moving the spring up and down, and then the elastic force applied by the spring to the contact plate can be adjusted. At the same time, the overall elastic force can be adjusted by placing multiple springs, which has better applicability;

[0017] 2. There are induction sheets and induction switches on both sides of the contact plate. When the tray presses the contact plate, the induction sheets on both sides can touch the induction switches, which can avoid low detection accuracy caused by failure of one of the induction switches;

[0018] 3. A U-shaped groove is provided on the shaft seat to facilitate the entry of the shaft. Therefore, the shaft seat can be installed after the shaft is installed, which is more convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0020] Figure 2 It is an assembly drawing of the rotating shaft and the rotating shaft seat of the embodiment.

[0021] In the figure:

[0022] 1. Frame; 2. Fork; 3. Contact plate; 31. Mounting slot; 4. Spring piece; 41. Connecting part; 411. Positioning slot; 412. Positioning bolt; 42. Supporting part; 5. Induction sheet; 6. Induction switch; 7. Adapter; 71. Rotating shaft seat; 711. U-shaped slot; 72. Rotating shaft. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0024] like Figure 1-2 As shown, a forklift pallet detection mechanism includes a contact plate 3, an elastic support member and a sensing member. The forklift also includes a frame 1 and a fork mechanism. The fork mechanism includes a fork 2 and a pallet located on the fork 2. The fork 2 is located at the front side of the frame 1. The pallet has a first position away from the frame 1 and a second position with an end portion attached to the front side of the frame 1. The upper end of the contact plate 3 is rotatably fixed to the front side of the frame 1. The elastic support member is movably fixed to the front side of the frame 1 and can abut against the inner side of the lower end of the contact plate 3. Since the elastic support member can be moved The contact plate 3 is moved in a row, and its contact position with the contact plate 3 can be adjusted, thereby adjusting the elastic force applied to the contact plate 3, and its elastic force is used to drive the lower end of the contact plate 3 away from the front side of the frame 1. The sensing member includes a first sensing unit fixed on the inner side of the lower end of the contact plate 3 and a second sensing unit fixed in the frame 1. When the pallet moves to the second station, it will squeeze the elastic support member through the contact plate 3, overcome the elastic force, and make the contact plate 3 fit to the front side of the frame 1. At this time, the first sensing unit is connected to the second sensing unit, thereby determining that the pallet is in place.

[0025] In this embodiment, when the pallet is at the first station, it is located at the front end of the fork 2 and is used to cooperate with the fork 2 to pick up the goods. When the pallet is at the second station, the pallet is located at the rear end of the fork 2. At this time, the pallet is not easy to slide and is suitable for transportation. Therefore, the pallet needs to be moved to the second station before the forklift moves.

[0026] In this embodiment, in order to ensure the detection accuracy of the tray, the first sensing unit is set as a sensing sheet 5, and the second sensing unit is set as a sensing switch 6. The two sensing sheets 5 are symmetrically distributed on both sides of the contact plate 3, and the two sensing switches 6 are symmetrically arranged on both sides of the front side of the frame, and correspond one to one with the sensing sheets 5. When the tray pushes the lower end of the contact plate 3 to move inward, the two sensing sheets 5 can both contact the corresponding sensing switches 6. Compared with setting the sensing sheet 5 and the sensing switch 6 on one side, setting them on both sides at the same time can avoid damage to one of the sensing switches 6, thereby ensuring the detection accuracy of the tray.

[0027] In order to ensure that the contact plate 3 is subjected to uniform force, the elastic support member includes at least two groups of spring plates 4, and the two groups of spring plates 4 are respectively located on two symmetrical sides of the front side of the frame 1, and respectively abut against the two sides of the lower end of the contact plate 3. This can provide support for both sides of the lower end of the contact plate 3 at the same time, and can ensure that the supporting force is consistent. When the contact plate 3 is subjected to the driving force of the tray, the force on both sides is also more uniform.

[0028] At the same time, in order to adjust the elastic force applied to the contact plate 3 by the spring pieces 4, each group of spring pieces 4 includes at least one spring piece 4, so the number of spring pieces 4 can be adjusted. By using different numbers of spring pieces 4, the elastic force can be adjusted. The spring pieces 4 include a connecting portion 41 and a supporting portion 42. The connecting portion 41 is fixed to the frame 1 by a positioning bolt 412, and the connecting portion 41 is provided with a positioning groove 411 arranged along the up and down direction. One end of the positioning bolt 412 passes through the positioning groove 411 and connects with the frame 1. When the position of the spring piece 4 needs to be adjusted, the positioning bolt 412 can be temporarily opened, and then the spring piece 4 is moved up and down. After it is moved into place, it is locked and fixed by the positioning bolt 412. After the up and down position of the spring piece 4 is adjusted, the up and down position of the spring piece 4 against the contact plate 3 can be adjusted, thereby changing the elastic force acting on the contact plate 3.

[0029] In order to realize the connection between the contact plate 3 and the frame 1, an adapter 7 is also provided, which includes a shaft seat 71 and a shaft 72. The shaft seat 71 is detachably fixed to the frame 1, and the shaft 72 is rotatably passed through the shaft seat 71, and both ends of the shaft 72 are connected to the upper end of the contact plate 3. When the contact plate 3 rotates, the shaft 72 will rotate relative to the shaft seat 71. Specifically, the upper end of the contact plate 3 is provided with a mounting groove 31, and the shaft 72 is arranged in the mounting groove 31 along the horizontal direction and connected to the two side walls opposite to the mounting groove 31. Both shaft seats 71 can pass through the mounting groove 31 and connect with the frame 1. Through the arrangement direction of the shaft 72, the contact plate 3 is limited to rotate only in the up and down directions.

[0030] In order to facilitate the installation and disassembly of the contact plate 3, a U-shaped groove 711 is provided on the inner side of the shaft seat 71, and the shaft 72 can be inserted into the U-shaped groove 711. During the installation process, the upper end of the contact plate 3 can be pressed onto the frame 1 first, and the shaft seat 71 is snapped onto the outer side of the shaft 72 through the installation groove 31. Since the U-shaped groove 711 is provided with an opening, the shaft 72 can enter the U-shaped groove 711 and then be fixed by screws, which makes installation and disassembly more convenient.

[0031] The technical solution of the utility model is described in detail above in conjunction with the accompanying drawings, and the described embodiments are used to help understand the idea of ​​the utility model. The specific embodiments described herein are merely examples of the spirit of the utility model. A person skilled in the art of the utility model may make various modifications or supplements to the described specific embodiments or replace them in a similar manner, but this will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A forklift pallet detection mechanism, the forklift comprises a frame and a fork mechanism, the fork mechanism comprises a fork and a pallet located on the fork, the fork is located at the front side of the frame, the pallet has a first station away from the frame and a second station where the end is attached to the front side of the frame, characterized in that: The detection mechanism includes: A contact plate, the upper end of which is rotatably fixed to the front side of the frame; an elastic support member, which is movably fixed to the front side of the frame and abuts against the inner side of the lower end of the contact plate to drive the lower end of the contact plate away from the front side of the frame; The sensing member includes a first sensing unit fixed on the inner side of the lower end of the contact plate and a second sensing unit fixed in the frame. When the tray moves to the second station, the tray can squeeze the elastic support member through the contact plate, and the first sensing unit can be connected to the second sensing unit.

2. A forklift pallet detection mechanism according to claim 1, characterized in that: The elastic support member includes at least two groups of spring sheet groups, which are respectively located on two symmetrical sides of the front side of the frame and respectively abut against two sides of the lower end of the contact plate.

3. A forklift pallet detection mechanism according to claim 2, characterized in that: Each group of the spring sheet groups includes at least one spring sheet, and the spring sheet includes a connecting portion and a supporting portion. The connecting portion is fixed to the frame by a positioning bolt, and the connecting portion is provided with a positioning groove arranged along the up and down direction, and one end of the positioning bolt passes through the positioning groove and is connected to the frame.

4. A forklift pallet detection mechanism according to claim 1, characterized in that: It also includes an adapter, which includes a rotating shaft seat and a rotating shaft. The rotating shaft seat can be detachably fixed on the frame, and the rotating shaft can be rotatably inserted into the rotating shaft seat, and both ends of the rotating shaft are connected to the upper end of the contact plate.

5. A forklift pallet detection mechanism according to claim 4, characterized in that: The upper end of the contact plate is provided with a mounting groove, the rotating shaft is arranged in the mounting groove in a transverse direction and connected with two opposite side walls of the mounting groove, and both the rotating shaft seats can pass through the mounting groove and connect with the vehicle frame.

6. A forklift pallet detection mechanism according to claim 4 or 5, characterized in that: A U-shaped groove is arranged on the inner side of the rotating shaft seat, and the rotating shaft can be inserted into the U-shaped groove.

7. A forklift pallet detection mechanism according to claim 1, characterized in that: The first sensing unit is configured as a sensing sheet, the second sensing unit is configured as a sensing switch, the two sensing sheets are symmetrically distributed on two symmetrical sides of the contact plate, and the two sensing switches are symmetrically arranged on two sides of the front side of the frame and correspond one to one with the sensing sheets.

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