High-precision stacking machine driven by gear and rack

Abstract

The utility model provides a gear rack transmission high-precision stacking machine which comprises a pallet fork and a stand column, the stand column is provided with a vertically-arranged rack, and the two sides of the pallet fork are provided with gears driven by a gear motor and meshed with the rack. The pallet fork is further provided with a guide wheel assembly which is in rolling connection with the stand column to achieve lifting guide of the pallet fork. A brake block which is driven by a push-pull electromagnet to horizontally move is further mounted on the pallet fork and is close to or far away from the stand column; when the push-pull electromagnet loses power, the brake block moves towards the vertical column; when the brake block abuts against the stand column, the brake block gradually moves upwards under the action of friction force generated between the stand column and the brake block, and the pressure between the brake block and the stand column is gradually increased. According to the utility model, the lifting brake of the fork is realized through the brake block, the structure is simple, the pressure between the brake block and the stand column is gradually increased in the braking process, and the braking effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of stackers, in particular to a high-precision stacker with a rack and pinion drive. Background Art

[0002] A stacker is an essential device for a stereoscopic warehouse, which uses a fork to stack or pick up goods from a high-level shelf.

[0003] The lifting assembly for driving the fork generally includes a brake to prevent the fork from freely falling due to a malfunction after rising, which may cause a safety accident. The traditional brake is hydraulically driven. Although it can provide a large amount of power, its structure is complex, the maintenance cost is high, and the leakage problem of hydraulic oil is difficult to avoid. This not only increases the maintenance difficulty but also may cause environmental pollution. In addition, the response speed of the hydraulic system is relatively slow, which limits the working efficiency of the stacker. Summary of the Utility Model

[0004] To solve the technical problems in the background art, the utility model discloses a high-precision stacker with a rack and pinion drive.

[0005] The utility model provides a high-precision stacker with a rack and pinion drive, which includes a fork and a column. A vertically arranged rack is provided on the column, and gears driven by a reduction motor and meshing with the rack are arranged on both sides of the fork;

[0006] A guide wheel assembly is further provided on the fork, which is in rolling connection with the column to realize the lifting guidance of the fork;

[0007] A brake block driven by a push-pull electromagnet to move horizontally is further installed on the fork, which approaches or moves away from the column;

[0008] When the push-pull electromagnet loses power, the brake block moves towards the column;

[0009] When the brake block abuts against the column, it will gradually move upward under the action of the frictional force generated between the column and the brake block, and the pressure between the brake block and the column will also gradually increase.

[0010] The utility model realizes the lifting braking of the fork through the brake block, which not only has a simple structure, but also during the braking process, the pressure between the brake block and the column gradually increases, and its braking effect is better.

[0011] Since the column is relatively high, to match the guide wheel assembly to realize the lifting guidance, its precision is relatively high and the processing difficulty is also high. Based on this, a further improvement lies in that: a vertically arranged guide strip is provided on the column; the guide wheel assembly includes a first guide wheel and a second guide wheel that sandwich the two sides of the guide strip.

[0012] To further improve the lifting stability of the fork, specifically: a third guide wheel is further provided on the fork; the third guide wheel is in rolling connection with the outer side surface of the guide strip.

[0013] The specific installation structure of the brake block is as follows: an inclined connecting plate is arranged on the fork; a connecting column is arranged on one side of the connecting plate facing the guide bar; a slider is sleeved on the connecting column; the slider is elastically connected by a first spring sleeved on the connecting column; the brake block is installed on the connecting plate, so that when the brake block moves up and down, it approaches or moves away from the guide bar.

[0014] If the brake block is installed on the end face of the slider, it is easy to fall off. Based on this, a further design is: a clamping groove is arranged on the slider; the brake block is clamped in the clamping groove.

[0015] To avoid the phenomenon of locking between the brake block and the guide bar, a further improvement is: a disc spring is also connected between the connecting plate and the fork to realize the elastic connection of the connecting plate.

[0016] During braking, if only one side of the guide bar is stressed, the force is uneven, which easily affects the braking stability. Based on this, a further improvement is: a cam brake piece connected by eccentric rotation is also installed on the fork; the cam brake piece and the brake block are located on opposite sides of the guide bar; the cam brake piece is driven by a push-pull electromagnet to approach or move away from the guide bar.

[0017] The beneficial effect of the present utility model is: the present utility model realizes the lifting and braking of the fork through the brake block, which not only has a simple structure, but also during the braking process, the pressure between the brake block and the column gradually increases, and its braking effect is better. Description of the Drawings

[0018] The present utility model will be further described below with reference to the drawings and embodiments.

[0019] Figure 1 is the structural schematic diagram of the present utility model;

[0020] Figure 2 is the front view of the installation structure of the guide wheel assembly and the column;

[0021] Figure 3 is Figure 2 the sectional view taken along A-A in;

[0022] Figure 4 is Figure 3 the enlarged view at B in;

[0023] In the figure: 1, fork; 2, column; 3, rack; 4, reduction motor; 6, push-pull electromagnet; 7, brake block; 8, guide bar; 9, first guide wheel; 10, second guide wheel; 11, third guide wheel; 12, connecting plate; 13, connecting column; 14, slider; 15, first spring; 16, clamping groove; 17, disc spring; 18, cam brake piece; 19, second spring; 20, base plate; 21, lifting frame; 22, mounting frame. Detailed Embodiment

[0024] The present utility model will now be described in further detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only showing the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0025] As Figure 1 shown, the present utility model discloses a high-precision stacker with a gear-rack drive, which includes a fork 1 and a column 2. The column 2 is provided with two symmetrically arranged columns, and a vertically arranged rack 3 is installed on the opposite sides thereof. The fork 1 is installed on a lifting frame 21, and gears driven by a reduction motor 4 are installed on both sides of the lifting frame 21, which mesh with the rack 3 to realize the lifting of the fork 1.

[0026] Vertically arranged guide bars 8 with a rectangular end face are installed on the front and rear sides of the column 2; guide wheel assemblies arranged symmetrically are provided on both sides of the lifting frame 21, which are in rolling connection with the guide bars 8 to realize the lifting guidance of the fork 1. As Figures 2-4 shown, the guide wheel assembly includes a mounting frame 22, and a first guide wheel 9, a second guide wheel 10 and a third guide wheel 11 are installed on the mounting frame 22. The first guide wheel 9 and the second guide wheel 10 abut against the opposite sides of the guide bar 8, and the third guide wheel 11 abuts against the outer side of the guide bar 8.

[0027] A push-pull type electromagnet 6 arranged horizontally is installed on the mounting frame 22, including a housing and a push rod, and the push rod penetrates through both ends of the housing. Left and right moving blocks are respectively installed at both ends of the push rod, and the left and right moving blocks are elastically connected to the housing through a second spring 19 sleeved on the push rod.

[0028] A base plate 20 and a connecting plate 12 are arranged at the upper end of the left moving block. The base plate 20 is fixedly connected to the left moving block, and the connecting plate 12 is connected to the base plate 20 through bolts and nuts. A disc spring 17 sleeved on the bolt is arranged between the base plate 20 and the connecting plate 12 to realize the elastic connection of the connecting plate 12. Two symmetrically arranged connecting columns 13 are arranged on the side of the connecting plate 12 facing the guide bar 8. A slider 14 is sleeved on the connecting column 13, and first springs 1 sleeved on the connecting column 13 are arranged at both ends of the slider 14 to realize the elastic connection of the slider 14. The slider 14 is provided with a concave U-shaped card slot 16, and a brake block 7 is clamped in the card slot 16, and the brake block 7 protrudes from the card slot 16. The card slot 16 is used to prevent the brake block 7 from falling off during braking.

[0029] Among them, the connecting column 13 is arranged obliquely in the vertical direction, with its upper end close to the guide bar 8 and its lower end far from the guide bar 8. The side of the brake block 7 facing the guide bar 8 is parallel to the guide bar 8. When the forklift fork 1 needs to be braked, the push-pull electromagnet 6 loses power, and the push rod moves under the restoring force of the second spring 19, driving the brake block 7 to abut against the guide bar 8. When the forklift fork 1 descends due to a malfunction, the frictional force generated between the brake block 7 and the guide bar 8 will drive the brake block 7 to move upward, so that the distance between the brake block 7 and the guide bar 8 gradually becomes smaller, the pressure gradually becomes larger, and the frictional force also gradually becomes larger, thus preventing the forklift fork 1 from descending. There are two guide bars 2 arranged symmetrically, and vertical racks 3 are installed on their opposite sides. The forklift fork 1 is installed on the lifting frame 21, and gears driven by a reduction motor 4 are installed on both sides of the lifting frame 21 and mesh with the racks 3, so as to realize the lifting of the forklift fork 1.

[0030] Above the right moving block, there is a cam brake disc 18, which is eccentrically rotatably connected to the lifting frame. The side of the cam brake disc 18 far from the guide bar 8 is connected to the right moving block through a hinged driving rod. When the push-pull electromagnet 6 loses power, the right moving block drives the cam brake disc 18 to rotate, so that the cam brake disc 18 abuts against the guide bar 8 for braking.

[0031] The brake block 7 and the cam brake disc 18 are located on opposite sides of the guide bar 8, so that the guide bar 8 is evenly stressed during braking, and the position of the forklift fork 1 is more stable after braking.

[0032] The present utility model realizes the lifting and braking of the forklift fork 1 through the brake block 7. It not only has a simple structure, but also during the braking process, the pressure between the brake block 7 and the column 2 gradually increases, and its braking effect is better. The setting of the disc spring 17 makes the connecting plate 12 elastic, avoiding the phenomenon of locking during braking.

[0033] Inspired by the above ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A high-precision stacker with a rack and pinion transmission, comprising a fork (1) and a column (2), characterized in that: The column (2) is provided with a vertically arranged rack (3), and gears (5) driven by a reduction motor (4) and meshing with the rack (3) are provided on both sides of the fork (1); The fork (1) is also provided with a guide wheel assembly which is rollingly connected to the column (2) to achieve lifting and guiding of the fork (1); The fork (1) is also provided with a push-pull electromagnet (6) to drive a brake block (7) to move horizontally, approaching or moving away from the column (2); When the push-pull electromagnet (6) loses power, the brake block (7) moves toward the column (2); When the brake block (7) abuts against the column (2), it will gradually move upwards under the action of the friction force generated between the column (2) and the brake block (7), and the pressure between the brake block (7) and the column (2) will also gradually increase.

2. The high-precision stacker with rack and pinion transmission according to claim 1, characterized in that: The upright column (2) is provided with a vertically arranged guide bar (8); The guide wheel assembly comprises a first guide wheel (9) and a second guide wheel (10) which clamp the guide strip (8) on opposite sides.

3. The high-precision stacker with rack and pinion transmission according to claim 2, characterized in that: The cargo fork (1) is also provided with a third guide wheel (11); The third guide wheel (11) is rollingly connected to the outer side surface of the guide strip (8).

4. The high-precision stacker with rack and pinion transmission according to claim 2, characterized in that: The fork (1) is provided with an inclined connecting plate (12); A connecting column (13) is provided on one side of the connecting plate (12) facing the guide bar (8); The connecting column (13) is sleeved with a sliding block (14); The sliding block (14) is elastically connected via a first spring (15) sleeved on the connecting column (13); The brake block (7) is mounted on the connecting plate (12) so that the brake block (7) moves closer to or farther from the guide bar (8) when it is raised or lowered.

5. The high-precision stacker with rack and pinion transmission according to claim 4, characterized in that: The slider (14) is provided with a slot (16); The brake block (7) is clamped in the clamping groove (16).

6. The high-precision stacker with rack and pinion transmission according to claim 4, characterized in that: A disc spring (17) is also connected between the connecting plate (12) and the fork (1) to achieve elastic connection of the connecting plate (12).

7. The high-precision stacker with rack and pinion transmission according to claim 1, characterized in that: The cargo fork (1) is also provided with a cam brake piece (18) which is eccentrically rotatably connected; The cam brake pad (18) and the brake block (7) are located on opposite sides of the guide bar (8); The cam brake piece (18) is driven by a push-pull electromagnet (6) to move closer to or farther from the guide bar (8).

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