Telescopic and lifting type electric pallet fork

Abstract

The telescopic and lifting type electric pallet fork is characterized in that the telescopic and lifting type electric pallet fork comprises a fork base, a lifting frame and a pallet fork body arranged on the lifting frame, a lifting driving mechanism is arranged on the fork base, the lifting driving mechanism is connected with the lifting frame and can drive the lifting frame to ascend and descend, a telescopic driving mechanism is arranged on the lifting frame, and the telescopic driving mechanism is connected with the lifting frame and can drive the lifting frame to ascend and descend. The telescopic driving mechanism is connected with the pallet fork and can drive the pallet fork to stretch out and draw back. By means of the structure, the electric pallet fork can move in the front-back dimension and the up-down dimension, the use environment of the electric pallet fork is expanded, and higher requirements of users are met.

Description

Technical Field

[0001] The invention relates to a storage and transportation device, in particular to a telescopic and lifting electric fork. Background Art

[0002] In an automated warehouse, a stacker is essential, and the core component of the stacker is the fork. An automated warehouse can be several stories high, a dozen stories high, or even dozens of stories high. The function of the stacker is to deliver the goods to the designated location through the fork.

[0003] However, ordinary forks only have a telescopic function and cannot be raised or lowered, which limits their use in certain occasions. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a telescopic and lifting electric fork.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A telescopic and lifting electric fork, characterized in that it includes a fork seat, a lifting frame and a fork arranged on the lifting frame, the fork seat is provided with a lifting drive mechanism, the lifting drive mechanism is connected to the lifting frame and can drive the lifting frame to rise and fall, the lifting frame is provided with a telescopic drive mechanism, the telescopic drive mechanism is connected to the fork and can drive the fork to extend and retract.

[0007] The lifting drive mechanism includes a lifting drive motor, two eccentric connecting parts, two lifting shafts, and a lifting transmission mechanism arranged on a fork seat. The lifting shafts are slidingly connected to the lifting frame through bearings, the shaft heads of the lifting shafts are fixedly connected to the upper parts of the corresponding eccentric connecting parts, and the lifting drive motor is fixedly connected to the lower part of the eccentric connecting part through the lifting transmission mechanism.

[0008] The lifting transmission mechanism includes a lifting shaft group and a lifting gear group. The lifting shaft group includes a lifting power shaft arranged in a fork seat, a lifting eccentric shaft arranged relatively to each other, and a plurality of lifting gear shafts. The lifting gear group includes a plurality of lifting transmission gears meshing with each other. The lifting power shaft, the lifting eccentric shaft and the plurality of lifting gear shafts are fixed to the corresponding lifting transmission gears, and the lifting power shaft, the lifting eccentric shaft and the plurality of lifting gear shafts are connected to the fork seat through bearings. The lifting drive motor is connected to the lifting power shaft, and the lifting eccentric shaft is fixedly connected to the lower part of the eccentric connecting member.

[0009] The lifting transmission mechanism also includes a lifting transmission shaft. The lifting shaft group and the lifting gear group have two groups, and one group of the lifting shaft group corresponds to one group of the lifting gear group. The end of the lifting transmission shaft is connected to the corresponding lifting power shaft.

[0010] The telescopic drive mechanism comprises a telescopic drive motor, a telescopic transmission structure 1, and a telescopic support guide structure 1. The fork moves linearly on the lifting frame through the telescopic support guide structure 1, and the telescopic drive motor drives the fork to extend and retract through the telescopic transmission structure 1.

[0011] The telescopic transmission structure includes a telescopic main shaft, a telescopic gear shaft, a telescopic rack, a telescopic main gear, a telescopic slave gear meshing with the telescopic main gear, a plurality of telescopic movable gears and a plurality of telescopic transition gears. The telescopic rack is fixed on the fork, one end of the telescopic main shaft is fixedly connected to the corresponding telescopic movable gear and the other end is fixedly connected to the telescopic slave gear, part of the telescopic gear shaft is fixedly connected to the corresponding telescopic movable gear and the other part of the telescopic gear shaft is fixedly connected to the corresponding telescopic transition gear, the telescopic drive motor is fixedly connected to the telescopic main gear, the telescopic movable gear is meshed with the corresponding telescopic transition gear, and the telescopic rack is meshed with the telescopic movable gear.

[0012] The fork is provided with a fork plate, and the fork plate is moved by being guided by the telescopic support guide structure 2 and driven by the telescopic transmission structure 2. The telescopic transmission structure 2 includes a telescopic gear shaft 2, an upper rack, a lower rack, a plurality of telescopic movable gears 2 and a plurality of telescopic transition gears 2. The fork plate is fixed to the upper rack, and the lower rack is fixed to the lifting frame. The telescopic movable gear 2 is meshed with the corresponding telescopic transition gear 2, and the telescopic movable gear 2 is meshed with both the upper rack and the lower rack.

[0013] The telescopic support guide structure 1 includes a support wheel 1 relatively arranged on the lifting frame and a guide wheel 1 relatively arranged on the lifting frame. The support wheel 1 contacts the bottom surface of the fork to support the fork, and the side surface of the fork contacts the corresponding guide wheel 1 to limit its deflection during movement.

[0014] The second telescopic support guide structure includes a second support wheel relatively arranged on the fork plate and a guide plate arranged on the fork plate. A guide groove is provided on the fork, the guide plate is located in the guide groove, and the upper rack is fixed to the bottom surface of the guide plate.

[0015] The fork seat is provided with a sensor 1 for detecting the lifting and lowering of the fork and a sensor 2 for detecting the extension and retraction of the fork.

[0016] The beneficial effects of the present invention are as follows: the present invention comprises a fork seat, a lifting frame and a fork arranged on the lifting frame, the fork seat is provided with a lifting drive mechanism, the lifting drive mechanism is connected to the lifting frame and can drive the lifting frame to lift and lower, the lifting frame is provided with a telescopic drive mechanism, the telescopic drive mechanism is connected to the fork and can drive the fork to telescope, through the above structure, the electric fork of the present application can realize movement in two dimensions, front and back and up and down, expands its use environment, and meets the higher needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 This is the overall structural view of the electric fork;

[0019] Figure 2 It is a structural view of the fork seat and the lifting drive mechanism;

[0020] Figure 3 is a view of the internal structure of the telescopic drive mechanism located in the lifting frame;

[0021] Figure 4 It is the exploded structure view of the fork part;

[0022] Figure 5 It is the exploded structure view of the fork part in the upward direction;

[0023] Figure 6 This is a view of the internal structure of the fork;

[0024] Figure 7 It is a cross-sectional structural view of the fork and lifting drive mechanism;

[0025] Figure 8 This is the overall structural view of the electric fork;

[0026] Fig. 9 This is the overall structural view of the electric fork;

[0027] Fig.10 It is a structural view of the lifting frame. DETAILED DESCRIPTION

[0028] The advantages and features of the present disclosure and its implementation methods will be explained by the following embodiments described with reference to the accompanying drawings. However, the present disclosure can be embodied in different forms and should not be interpreted as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure will be comprehensive and complete, and will fully convey the scope of the present disclosure to those skilled in the art. In addition, the present disclosure is limited only by the scope of the claims.

[0029] The shapes, sizes, ratios, angles and numbers disclosed in the drawings for describing the embodiments of the present disclosure are only examples, and therefore the present disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, when the detailed description of the relevant known functions or configurations is determined to be unnecessary to blur the focus of the present disclosure, the detailed description will be omitted. In the case of using "including", "having" and "comprising" described in this specification, other parts may be added unless "only" is used. Unless otherwise indicated, the terms in the singular may include plural forms.

[0030] When explaining an element, although not explicitly described, the element is understood to include a range of error.

[0031] When describing a positional relationship, for example, when the positional relationship is described as "on," "above," "below," and "adjacent to," unless "immediately" or "directly" is used, one or more parts may be arranged between two other parts.

[0032] When describing a time relationship, for example, when a time sequence is described as “after,” “subsequently,” “next,” and “before,” discontinuous cases may be included unless “just” or “directly” is used.

[0033] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the present disclosure.

[0034] As those skilled in the art can fully understand, the features of the different embodiments of the present disclosure can be coupled or combined with each other in part or in whole, and can cooperate with each other in various ways and be driven technically. The embodiments of the present disclosure can be performed independently of each other, or can be performed together in a mutually dependent relationship.

[0035] Reference Figure 1 The present invention discloses a telescopic and lifting electric fork, comprising a fork seat 1, a lifting frame 2 and a fork 3 arranged on the lifting frame 2. Of course, the fork 3 has two relatively parallel arrangements. The fork seat 1 is provided with a lifting drive mechanism, which is connected to the lifting frame 2 and can drive the lifting frame 2 to rise and fall. The lifting frame 2 is provided with a telescopic drive mechanism, which is connected to the fork 3 and can drive the fork 3 to extend and retract.

[0036] The fork 3 of the present application is used to transport the wire cart to the corresponding workshop or warehouse on the high floor. In order to prevent the wire cart from moving during transportation or lifting, there is a positioning rod 4 on the fork 3, and there is a positioning hole on the wire cart. Therefore, when the fork 3 lifts the wire cart, the positioning rod 4 is inserted into the positioning hole. Therefore, when the wire cart is just lifted up, the fork 3 needs to be raised and the positioning rod 4 is inserted into the positioning hole. After the wire cart is transported to the destination, the fork 3 needs to be lowered and the positioning rod 4 is removed from the positioning hole. In this way, the fork 3 can be retracted to start forking the next wire cart. Therefore, the present application designs a telescopic and lifting electric fork 3 for the above-mentioned application environment, and realizes the lifting and extension of the fork 3 through a lifting drive mechanism and a telescopic drive mechanism.

[0037] like Figure 2 As shown, as a specific structure, the lifting drive mechanism includes a lifting drive motor 5, two eccentric connecting members 6, two lifting shafts 7, and a lifting transmission mechanism, which are arranged on the fork seat 1. The lifting shafts 7 are slidably connected to the lifting frame 2 through bearings, and the shaft heads of the lifting shafts 7 are fixedly connected to the upper parts of the corresponding eccentric connecting members 6. The lifting drive motor 5 is fixedly connected to the lower parts of the eccentric connecting members 6 through the lifting transmission mechanism. In this embodiment, when the lifting drive motor 5 is working, the two eccentric connecting members 6 are simultaneously driven to rotate through the lifting transmission mechanism. When the eccentric connecting member 6 rotates, the corresponding lifting shaft 7 is driven to rotate eccentrically. Because the lifting shafts 7 are slidably connected to the lifting frame 2 through bearings, the lifting frame 2 will maintain a horizontal state and will not rotate with the lifting shafts 7, but will only lift in a straight line, thereby realizing the straight lifting of the fork 3. The above structure is also easy to manufacture and assemble.

[0038] A square hollow frame is provided on the bottom surface of the lifting frame 2, and a slide groove 8 is located on the inner surface of the hollow frame. The end of the lifting shaft 7 is located in the hollow box. The bearing 9 on the lifting shaft 7 can roll in the slide groove 8, so the friction between the bearing 9 and the slide groove 8 is very small, and the lifting frame 2 is very heavy, so the bearing 9 will not drive the lifting frame 2 to move horizontally through friction when rolling, ensuring that when the lifting shaft 7 rotates, the lifting frame 2 will not rotate with the lifting shaft 7 but will only rise and fall in a straight line. The positioning of the bearing 9 on the lifting shaft 7 is achieved by two clamps, one clamp on the left and one on the right of the bearing 9, so as to limit the movement of the bearing 9 along the lifting shaft 7. The above structure is simple and easy to process and assemble.

[0039] like Figure 2As shown in the figure, as a specific structure, the lifting transmission mechanism in this structure includes a lifting shaft group and a lifting gear group, the lifting shaft group includes a lifting power shaft 10 arranged in the fork seat 1, a lifting eccentric shaft 11 arranged relatively, and a plurality of lifting gear shafts, the lifting gear group includes a plurality of lifting transmission gears 13 meshing with each other, the lifting power shaft 10, the lifting eccentric shaft 11 and the plurality of lifting gear shafts are fixed with the corresponding lifting transmission gears 13, and the lifting power shaft 10, the lifting eccentric shaft 11 and the plurality of lifting gear shafts are connected to the fork seat 1 through bearings, and the lifting drive motor 5 The lifting drive motor 5 can be connected to the lifting power shaft 10 through a coupling, thereby driving the lifting power shaft 10 to rotate, thereby driving the lifting transmission gear 13 on the lifting power shaft 10 to rotate, and the lifting transmission gear 13 on the lifting power shaft 10 drives the lifting transmission gears 13 on both sides to transmit once, so that the lifting eccentric shaft 11 located on the edge rotates, thereby driving the eccentric connecting member 6 to rotate. The above structure has good reliability and can transmit a large torque. The eccentric connecting member 6 includes an upper plate and a lower plate, with a lower hole and an upper hole, and the upper hole is formed by the upper plate and the lower plate being locked by screws. The lifting shaft 7 is fixed in the upper hole, and the lifting eccentric shaft 11 is fixed in the lower hole. The fixing method of the lifting shaft 7 and the lifting eccentric shaft 11 to the eccentric connecting member 6 is a conventional method, so it is described in detail.

[0040] As shown in the figure, as a further preferred structure, the lifting transmission mechanism also includes a lifting transmission shaft 14, the lifting shaft group and the lifting gear group have two groups, and one group of the lifting shaft group corresponds to one group of the lifting gear group, and the end of the lifting transmission shaft 14 is connected to the corresponding lifting power shaft 10. Through the above structure, both ends of the lifting shaft 7 are driven by power to rotate, thereby avoiding excessive force on one side and causing excessive wear, thereby reducing its service life.

[0041] like Figures 3 to 10 As shown, the telescopic drive mechanism includes a telescopic drive motor 15, a telescopic transmission structure 1, and a telescopic support guide structure 1, which are arranged on the lifting frame 2. The fork 3 moves linearly on the lifting frame 2 through the telescopic support guide structure 1. The telescopic drive motor 15 drives the fork 3 to extend and retract through the telescopic transmission structure 1. The telescopic drive motor 15 is fixed on the lifting frame.

[0042] The specific structure is that the telescopic transmission structure includes a telescopic main shaft 16, a telescopic gear shaft 17, a telescopic rack 18, a telescopic main gear 19, a telescopic slave gear 20 meshing with the telescopic main gear 19, a plurality of telescopic movable gears 21 and a plurality of telescopic transition gears 22, one end of the telescopic main shaft 16 is fixedly connected to the corresponding telescopic movable gear 21 and the other end is fixedly connected to the telescopic slave gear 20, part of the telescopic gear shaft 17 is fixedly connected to the corresponding telescopic movable gear 21 and the other part of the telescopic gear shaft 17 is fixedly connected to the corresponding telescopic transition gear 22, the telescopic drive motor 15 is fixedly connected to the telescopic main gear 19, the telescopic movable gear 21 is meshed with the corresponding telescopic transition gear 22, and the telescopic rack 18 is meshed with the telescopic movable gear 21, and the telescopic main shaft 16 and the telescopic gear shaft 17 are both arranged on the lifting frame 2 through bearings.

[0043] The working principle is briefly described as follows: the telescopic driving motor 15 drives the telescopic main gear 19 to rotate, the telescopic main gear 19 drives the telescopic slave gear 20 to rotate, and the telescopic slave gear 20 drives the telescopic main shaft 16 to rotate, and the telescopic main shaft 16 drives the corresponding telescopic movable gear 21 to rotate, and the telescopic movable gear 21 will drive its adjacent telescopic transition gear 22 to rotate, and the telescopic transition gear 22 will simultaneously drive the adjacent telescopic movable gear 21 to rotate, thereby realizing the rotation of all the telescopic movable gears 21 and the telescopic transition gear 22, and the telescopic rack 18 is fixed, so the telescopic movable gear 21 drives the telescopic rack 18 to move along the telescopic rack 18 in cooperation with the telescopic rack 18, and the telescopic rack 18 is fixed to the fork 3, so the fork 3 moves with the telescopic rack 18 to achieve telescoping. In the above structure, three telescopic movable gears 21 and two telescopic transition gears 22 are meshed with each other to achieve simultaneous meshing transmission of multiple telescopic movable gears 21 and the telescopic rack 18, thereby greatly reducing the force received by a single gear when meshing with the rack, thereby extending the service life of the gear.

[0044] As shown in the figure, a fork plate 23 is provided on the fork 3, and the fork plate 23 is moved by being guided by the telescopic support guide structure 2 and driven by the telescopic transmission structure 2. The telescopic transmission structure 2 includes a telescopic gear shaft 24, an upper rack 25, a lower rack 26, a plurality of telescopic movable gears 27 and a plurality of telescopic transition gears 28. The fork plate 23 is fixed to the upper rack 25, and the lower rack 26 is fixed to the lifting frame 2. The telescopic movable gear 27 is meshed with the corresponding telescopic transition gear 28, and the telescopic movable gear 27 is meshed with both the upper rack 25 and the lower rack 26. Part of the telescopic gear shaft 24 is fixed to the telescopic movable gear 27, and the other part of the telescopic gear shaft 24 is fixed to the telescopic transition gear 28.

[0045] When it is needed, the fork 3 and the fork plate 23 can move at the same time, so the moving distance of the object on the fork plate 23 is the sum of the moving distances of the fork 3 and the fork plate 23, so it will not affect the stroke of the fork 3. However, when the device is not in use, the fork 3 occupies a smaller space, the fork plate 23 can overlap with the fork 3, and the fork plate 23 does not need to be equipped with additional power. The specific working principle is as follows: when the fork 3 moves, it will drive the telescopic moving gear 27 installed in the fork 3 and a plurality of telescopic transition gears 28 to move. As the fork 3 moves, the design principles of the telescopic movable gear 27 and several telescopic transition gears 28 are the same as before and are not described in detail. The telescopic movable gear 27 is meshed with the upper rack 25 and the lower rack 26 at the same time. Because the lower rack 26 is fixed on the lifting frame 2 and does not move, the telescopic movable gear 27 will rotate as the fork 3 moves, and while rotating, it will drive the upper rack 25 to move, and the upper rack 25 will drive the fork plate 23 to move, so that the fork plate 23 moves relative to the fork 3 while the fork 3 moves.

[0046] The telescopic support guide structure 1 includes a support wheel 1 29 relatively arranged on the lifting frame 2 and a guide wheel 1 30 relatively arranged on the lifting frame 2. The support wheel 1 29 contacts the bottom surface of the fork 3 to support the fork 3, and the side surface of the fork 3 contacts the corresponding guide wheel 1 30 to limit its deflection during movement.

[0047] The telescopic support guide structure 2 includes a support wheel 2 31 arranged relatively on the fork plate 23 and a guide plate 32 arranged on the fork plate 23. The fork 3 is provided with a guide groove 33, the guide plate 32 is located in the guide groove 33, and the upper rack 25 is fixed to the bottom surface of the guide plate 32.

[0048] The lifting frame 2 of the present application is in a tic-tac-toe shape, and square telescopic grooves 34 are relatively arranged on the lifting frame 2. The telescopic grooves 34 are surrounded by three square plates. The fork 3 is located in the corresponding telescopic groove 34, and the supporting wheel 29 is located on the groove wall of the telescopic groove 34. The supporting wheel 29 can use an ordinary needle bearing. Fork grooves 1 are arranged on both sides of the fork 3, and the supporting wheel 29 is located in the fork groove 1, so that the fork groove 1 forms a guide rail, and the guide wheel 30 is relatively arranged on the groove wall of the telescopic groove 34, and abuts against the part of the fork 3 exposed from the telescopic groove 34, so as to prevent the fork 3 from swinging when moving. The guide wheel 30 is also a bearing, so the specific installation structure is not described in detail.

[0049] A side plate 35 is provided opposite to the fork plate 23 below, and a guide plate 32 is located in the middle of the two side plates 35. A second support wheel 31 is provided on the inner side of the side plate 35, and a second fork groove 2 is provided on the outer side wall of the portion of the fork 3 exposed from the telescopic groove 34, and the second support wheel 31 is located in the second fork groove, so that the second fork groove forms a guide rail.

[0050] The fork seat 1 is provided with a sensor 1 36 for detecting the lifting and lowering of the fork 3 and a sensor 2 37 for detecting the extension and retraction of the fork 3. Both the sensor 1 36 and the sensor 2 37 are optical sensors. The sensor 1 36 can sense the lifting height of the fork 3, and the sensor 2 37 can sense the extension and retraction of the fork 3.

[0051] The telescopic and lifting electric fork provided in the embodiment of the present invention is introduced in detail above. The principle and implementation mode of the present invention are explained in detail by using specific examples herein. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A telescopic and lifting electric fork, characterized in that: It includes a fork seat, a lifting frame and a fork arranged on the lifting frame, the fork seat is provided with a lifting drive mechanism, the lifting drive mechanism is connected to the lifting frame and can drive the lifting frame to rise and fall, the lifting frame is provided with a telescopic drive mechanism, the telescopic drive mechanism is connected to the fork and can drive the fork to extend and retract.

2. The telescopic and lifting electric fork according to claim 1, characterized in that: The lifting drive mechanism includes a lifting drive motor, two eccentric connecting parts, two lifting shafts, and a lifting transmission mechanism arranged on a fork seat. The lifting shafts are slidingly connected to the lifting frame through bearings, the shaft heads of the lifting shafts are fixedly connected to the upper parts of the corresponding eccentric connecting parts, and the lifting drive motor is fixedly connected to the lower part of the eccentric connecting part through the lifting transmission mechanism.

3. The telescopic and lifting electric fork according to claim 2, characterized in that: The lifting transmission mechanism includes a lifting shaft group and a lifting gear group. The lifting shaft group includes a lifting power shaft arranged in a fork seat, a lifting eccentric shaft arranged relatively to each other, and a plurality of lifting gear shafts. The lifting gear group includes a plurality of lifting transmission gears meshing with each other. The lifting power shaft, the lifting eccentric shaft and the plurality of lifting gear shafts are fixed to the corresponding lifting transmission gears, and the lifting power shaft, the lifting eccentric shaft and the plurality of lifting gear shafts are connected to the fork seat through bearings. The lifting drive motor is connected to the lifting power shaft, and the lifting eccentric shaft is fixedly connected to the lower part of the eccentric connecting member.

4. The telescopic and lifting electric fork according to claim 3, characterized in that: The lifting transmission mechanism also includes a lifting transmission shaft. The lifting shaft group and the lifting gear group have two groups, and one group of the lifting shaft group corresponds to one group of the lifting gear group. The end of the lifting transmission shaft is connected to the corresponding lifting power shaft.

5. The telescopic and lifting electric fork according to claim 1, characterized in that: The telescopic drive mechanism comprises a telescopic drive motor, a telescopic transmission structure 1, and a telescopic support guide structure 1. The fork moves linearly on the lifting frame through the telescopic support guide structure 1, and the telescopic drive motor drives the fork to extend and retract through the telescopic transmission structure 1.

6. The telescopic and lifting electric fork according to claim 1, characterized in that: The telescopic transmission structure includes a telescopic main shaft, a telescopic gear shaft, a telescopic rack, a telescopic main gear, a telescopic slave gear meshing with the telescopic main gear, a plurality of telescopic movable gears and a plurality of telescopic transition gears. The telescopic rack is fixed on the fork, one end of the telescopic main shaft is fixedly connected to the corresponding telescopic movable gear and the other end is fixedly connected to the telescopic slave gear, part of the telescopic gear shaft is fixedly connected to the corresponding telescopic movable gear and the other part of the telescopic gear shaft is fixedly connected to the corresponding telescopic transition gear, the telescopic drive motor is fixedly connected to the telescopic main gear, the telescopic movable gear is meshed with the corresponding telescopic transition gear, and the telescopic rack is meshed with the telescopic movable gear.

7. The telescopic and lifting electric fork according to claim 6, characterized in that: The fork is provided with a fork plate, and the fork plate is moved by being guided by the telescopic support guide structure 2 and driven by the telescopic transmission structure 2. The telescopic transmission structure 2 includes a telescopic gear shaft 2, an upper rack, a lower rack, a plurality of telescopic movable gears 2 and a plurality of telescopic transition gears 2. The fork plate is fixed to the upper rack, and the lower rack is fixed to the lifting frame. The telescopic movable gear 2 is meshed with the corresponding telescopic transition gear 2, and the telescopic movable gear 2 is meshed with both the upper rack and the lower rack.

8. The telescopic and lifting electric fork according to claim 5, characterized in that: The telescopic support guide structure 1 includes a support wheel 1 relatively arranged on the lifting frame and a guide wheel 1 relatively arranged on the lifting frame. The support wheel 1 contacts the bottom surface of the fork to support the fork, and the side surface of the fork contacts the corresponding guide wheel 1 to limit its deflection during movement.

9. The telescopic and lifting electric fork according to claim 7, characterized in that: The second telescopic support guide structure includes a second support wheel relatively arranged on the fork plate and a guide plate arranged on the fork plate. A guide groove is provided on the fork, the guide plate is located in the guide groove, and the upper rack is fixed to the bottom surface of the guide plate.

10. The telescopic and lifting electric fork according to claim 1, characterized in that: The fork seat is provided with a sensor 1 for detecting the lifting and lowering of the fork and a sensor 2 for detecting the extension and retraction of the fork.

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