Three-stage bidirectional telescopic pallet fork

Abstract

The utility model relates to the technical field of telescopic pallet forks, in particular to a three-stage bidirectional telescopic pallet fork which drives a second gear set to rotate through a positive and negative rotation driving source, and the second gear set is in meshing transmission with a second spur rack on a second seat body so as to drive a third seat body to move relative to the second seat body. When moving along with the third seat body, the third spur rack drives the first gear set connected with the third spur rack in a meshed mode, the first gear set is in meshed transmission with the first spur rack on the first seat body so as to drive the second seat body to move relative to the first seat body, the structure is ingenious, the second seat body and the third seat body can stretch out and draw back in two directions, and goods can be conveniently taken, placed and transported; and the applicability of the pallet fork is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of telescopic forks, in particular to a three-stage bidirectional telescopic fork. Background Art

[0002] The telescopic fork is a core component of the stacker. For example, publication number CN215756228U discloses a three-layer telescopic fork that can be telescoped over a short distance. The lower chain is driven to rotate by a motor, and then the lower chain engages with the first chain rack and the second chain rack to drive the middle sliding seat to move and extend on the bottom seat. The second short-pitch roller chain is rotated to drive the upper sliding seat to slide and extend on the middle sliding seat. However, the above scheme cannot achieve two-way telescopic extension and retraction, and has low applicability. Utility Model Content

[0003] In order to achieve the above object, the utility model provides a three-stage bidirectional telescopic fork, comprising:

[0004] A first seat body, on which a first straight rack is fixedly mounted;

[0005] A second seat body, on which a first gear set meshingly connected with the first spur rack is disposed, and a second spur rack is also fixedly mounted on the second seat body;

[0006] A third seat body, on which a second gear set meshingly connected with the second spur rack is disposed, an input end of the second gear set is connected to a forward and reverse driving source, and the third seat body is also provided with a third spur rack meshingly connected with the first gear set;

[0007] The forward and reverse driving source drives the second gear set to rotate, the second gear set meshes with the second spur rack to transmit the third seat body to move relative to the second seat body, the third spur rack moves with the second seat body and drives the first gear set to rotate, the first gear set meshes with the first spur rack to transmit the second seat body to move relative to the first seat body.

[0008] In some possible embodiments, the first gear set includes a first driving gear and a second driving gear meshing with each other, the first driving gear is meshingly connected to the first spur rack, and the second driving gear is meshingly connected to the third spur rack.

[0009] In some possible embodiments, two intermediate gears meshingly connected in sequence are further arranged between the first driving gear and the second driving gear, and the first driving gear and the second driving gear rotate in opposite directions.

[0010] In some possible embodiments, the second gear set includes a driving gear and two third driving gears meshed on both sides of the driving gear, the driving gear is connected to the output end of the forward and reverse driving source, and the diameter of the driving gear is smaller than the diameter of the third driving gear.

[0011] In some possible embodiments, the tooth surface of the second spur rack faces upward, and the axes of the driving gear and the third driving gear are arranged horizontally.

[0012] In some possible embodiments, a guide assembly is arranged between the first seat body and the second seat body and / or between the second seat body and the third seat body, and the guide assembly includes a guide seat and two guide bars, and guide grooves are provided on opposite sides of the guide seat, and two guide bars are correspondingly arranged in the guide grooves, one of the guide bars is fixedly connected to the first seat body or the second seat body, and the other guide bar is fixedly connected to the second seat body or the third seat body.

[0013] In some possible embodiments, the first spur rack is arranged at a middle position of the first base body along the length direction of the first base body, and the second spur rack and the third spur rack are respectively arranged on both sides of the first spur rack.

[0014] Compared with the prior art, the beneficial effect of the utility model is that the three-stage bidirectional telescopic fork of the utility model drives the second gear set to rotate through the forward and reverse driving source, the second gear set is meshed with the second spur rack on the second seat body for transmission, thereby driving the third seat body to move relative to the second seat body, and when the third spur rack moves with the third seat body, it drives the first gear set meshed with it, and the first gear set is then meshed with the first spur rack on the first seat body for transmission, thereby driving the second seat body to move relative to the first seat body. The structure is ingenious and can realize bidirectional telescopic extension of the second seat body and the third seat body, which is convenient for picking up and transporting goods and improving the applicability of the fork. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A three-dimensional structural diagram of a three-stage bidirectional telescopic fork provided in an embodiment of the utility model;

[0017] Figure 2 Three-dimensional assembly of a three-stage bidirectional telescopic fork provided in an embodiment of the utility model Figure 1 ;

[0018] Figure 3 Three-dimensional assembly of a three-stage bidirectional telescopic fork provided in an embodiment of the utility model Figure 2 ;

[0019] Figure 4 A three-dimensional cross-sectional view of a three-stage bidirectional telescopic fork provided in an embodiment of the utility model.

[0020] Figure numerals: first seat body 1, first spur rack 11, second seat body 2, first gear set 21, first driving gear 211, second driving gear 212, intermediate gear 213, second spur rack 22, third seat body 3, second gear set 31, driving gear 311, third driving gear 312, third spur rack 32, forward and reverse driving source 33, guide assembly 4, guide seat 41, guide groove 42, guide bar 43. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Reference Figures 1 to 4The three-stage bidirectional telescopic fork shown in the figure comprises a first seat body 1, a second seat body 2 and a third seat body 3, the third seat body 3 is used for picking up and placing goods, the second seat body 2 can move forward and backward in the horizontal direction on the first seat body 1, and the third seat body 3 can move forward and backward in the horizontal direction on the second seat body 2, that is, the second seat body 2 and the third seat body 3 have the same moving direction. Specifically, a first spur rack 11 is fixedly mounted on the first seat body 1, a first gear set 21 meshingly connected to the first spur rack 11 is provided on the second seat body 2, a second spur rack 22 is also fixedly mounted on the second seat body 2, a second gear set 31 meshingly connected to the second spur rack 22 is provided on the third seat body 3, a third spur rack 32 is also fixedly mounted on the third seat body 3, the third spur rack 32 is meshingly connected to the first gear set 21, and the input end of the second gear set 31 is also connected to a forward and reverse driving source 33. During specific use, the forward and reverse driving source 33 drives the second gear set 31 to rotate, and the second gear set 31 meshes with the second spur rack 22 for transmission, thereby driving the third seat body 3 to move relative to the second seat body 2. The third spur rack 32 drives the first gear set 21 to rotate as the third seat body 3 moves, and the first gear set 21 meshes with the first spur rack 11 for transmission, thereby driving the second seat body 2 to move relative to the first seat body 1, thereby realizing a three-stage telescopic structure of the first seat body 1, the second seat body 2 and the third seat body 3, and when the forward and reverse driving source 33 rotates forward, it can drive the second seat body 2 and the third seat body 3 to move in the same direction, and when the forward and reverse driving source 33 reverses, it can drive the second seat body 2 and the third seat body 3 to move in the same direction in the opposite direction, so the third seat body 3 can extend in both directions from the second seat body 2 / first seat body 1 to pick up and place goods, thereby improving the applicability of the fork.

[0023] In some possible embodiments, the first gear set 21 includes a first driving gear 211 and a second driving gear 212 that are meshed with each other, that is, the first driving gear 211 and the second driving gear 212 rotate in opposite directions, wherein the first driving gear 211 is also meshed and connected with the first spur rack 11, and the second driving gear 212 is also meshed and connected with the third spur rack 32. When in use, the third spur rack 32 moves with the third seat body 3 to drive the second driving gear 212 to rotate, and the second driving gear 212 drives the first driving gear 211 to rotate, and the first driving gear 211 is meshed and transmitted with the first spur rack 11 fixedly connected to the first seat body 1 so that the second seat body 2 can move relative to the first seat body 1.

[0024] In some possible embodiments, two intermediate gears 213 are arranged between the first driving gear 211 and the second driving gear 212, which are meshed in sequence. The purpose of such a design is to increase the distance between the first driving gear 211 and the second driving gear 212, so as to ensure that the first driving gear 211 / the second driving gear 212 will not mesh with the first spur rack 11 and the third spur rack 32 at the same time. Of course, in order to ensure that the first driving gear 211 and the second driving gear 212 rotate in opposite directions, the number of the intermediate gears 213 should be an even number. In this embodiment, the line connecting the rotation axis of the first driving gear 211 and the rotation axis of the second driving gear 212 is not parallel to the moving direction of the second seat body 2.

[0025] In some possible embodiments, the second gear set 31 includes a driving gear 311 and two third driving gears 312 meshed on both sides of the driving gear 311, the driving gear 311 is connected to the output end of the forward and reverse driving source 33, that is, the forward and reverse driving source 33 can drive the driving gear 311 to rotate forward and reverse, and the driving gear 311 then drives the two third driving gears 312 to rotate, and the diameter of the driving gear 311 should be smaller than the diameter of the third driving gear 312 to ensure that the driving gear 311 will not be connected to the second spur rack 22; when used, the forward and reverse driving source 33 drives the two third driving gears 312 to rotate synchronously in the same direction through the driving gear 311, and the two third driving gears 312 are meshed with the second spur rack 22 for transmission, thereby driving the third seat body 3 to move relative to the second seat body 2.

[0026] In some possible embodiments, the tooth surface of the second spur rack 22 faces upward, and the axes of the driving gear 311 and the third driving gear 312 are horizontally arranged. In this case, the forward and reverse driving source 33 can also be horizontally arranged.

[0027] In some possible embodiments, in order to ensure smooth movement of the third seat body 3 relative to the second seat body 2 and smooth movement of the second seat body 2 relative to the first seat body 1, a guide assembly 4 is provided between the third seat body 3 and the second seat body 2 and between the second seat body 2 and the first seat body 1. The guide assembly 4 of this embodiment includes a guide seat 41 and two guide bars 43. The guide seat 41 has guide grooves 42 on opposite sides. The two guide bars 43 are correspondingly arranged in the guide grooves 42 and reciprocate in the guide grooves 42. Taking the guide assembly 4 between the third seat body 3 and the second seat body 2 as an example, one of the guide bars 43 is fixedly connected to the side of the third seat body 3, and the other guide bar 43 is fixedly connected to the side of the second seat body 2; taking the guide assembly 4 between the second seat body 2 and the first seat body 1 as an example, one of the guide bars 43 is fixedly connected to the side of the second seat body 2, and the other guide bar 43 is fixedly connected to the side of the first seat body 1.

[0028] In some possible embodiments, the first spur rack 11 is arranged in the middle of the first base body 1 along the length direction of the first base body 1 , and the second spur rack 22 and the third spur rack 32 are respectively arranged on both sides of the first spur rack 11 .

[0029] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A three-stage bidirectional telescopic fork, characterized in that: include: A first seat body (1) on which a first straight rack (11) is fixedly mounted; A second seat body (2), on which a first gear set (21) meshingly connected with the first spur rack (11) is disposed, and a second spur rack (22) is also fixedly mounted on the second seat body (2); a third seat body (3), on which a second gear set (31) meshingly connected to the second spur gear set (22) is disposed, an input end of the second gear set (31) being connected to a forward and reverse driving source (33), and the third seat body (3) is also provided with a third spur gear set (32) meshingly connected to the first gear set (21); The forward and reverse driving source (33) drives the second gear set (31) to rotate, the second gear set (31) and the second spur rack (22) are meshed and transmitted to enable the third seat body (3) to move relative to the second seat body (2), the third spur rack (32) moves with the second seat body (2) and drives the first gear set (21) to rotate, and the first gear set (21) and the first spur rack (11) are meshed and transmitted to enable the second seat body (2) to move relative to the first seat body (1).

2. A three-stage bidirectional telescopic fork according to claim 1, characterized in that: The first gear set (21) comprises a first driving gear (211) and a second driving gear (212) meshing with each other, the first driving gear (211) being meshingly connected to the first spur rack (11), and the second driving gear (212) being meshingly connected to the third spur rack (32).

3. A three-stage bidirectional telescopic fork according to claim 2, characterized in that: Two intermediate gears (213) meshed in sequence are also arranged between the first driving gear (211) and the second driving gear (212); the first driving gear (211) and the second driving gear (212) rotate in opposite directions.

4. A three-stage bidirectional telescopic fork according to claim 1, characterized in that: The second gear set (31) comprises a driving gear (311) and two third driving gears (312) meshed with the driving gear (311) on both sides; the driving gear (311) is connected to the output end of the forward and reverse driving source (33); the diameter of the driving gear (311) is smaller than the diameter of the third driving gear (312).

5. A three-stage bidirectional telescopic fork according to claim 4, characterized in that: The tooth surface of the second spur rack (22) faces upward, and the axes of the driving gear (311) and the third driving gear (312) are arranged horizontally.

6. A three-stage bidirectional telescopic fork according to claim 1, characterized in that: A guide assembly (4) is arranged between the first seat body (1) and the second seat body (2) and / or between the second seat body (2) and the third seat body (3), and the guide assembly (4) comprises a guide seat (41) and two guide strips (43). The guide seat (41) is provided with guide grooves (42) on opposite sides, and the two guide strips (43) are arranged in the guide grooves (42) respectively, one of the guide strips (43) is fixedly connected to the first seat body (1) or the second seat body (2), and the other guide strip (43) is fixedly connected to the second seat body (2) or the third seat body (3).

7. A three-stage bidirectional telescopic fork according to claim 1, characterized in that: The first spur rack (11) is arranged at a middle position of the first base body (1) along the length direction of the first base body (1), and the second spur rack (22) and the third spur rack (32) are arranged on both sides of the first spur rack (11).

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