Carrying-size-adjustable pallet fork

Abstract

The utility model relates to the field of pallet forks, in particular to a carrying size adjustable pallet fork which comprises a bottom plate and a pallet fork body, four guide rails are symmetrically arranged on the top of the bottom plate, a sliding block is arranged on the top of each guide rail in a sliding mode, the carrying size adjustable pallet fork further comprises a controller, an adjusting mechanism and a locking mechanism, and the adjusting mechanism comprises a driving assembly, a rotating assembly and two connecting rods. The locking mechanism is arranged on the outer wall of the pallet fork body and comprises a sleeve, a spline and a clamping assembly, a first half shaft and a second half shaft are symmetrically arranged on the outer wall of the pallet fork body, the sleeve is fixedly arranged at the end, away from the pallet fork body, of the second half shaft, and the spline is fixedly arranged on the outer wall of the first half shaft; the inner wall of the sleeve is provided with a spline groove for insertion of the spline, the clamping assembly is arranged between the sleeve and the first half shaft, the driving assembly is electrically connected with the controller, the carrying size adjustable pallet fork meets the adjusting requirements of cargoes with different carrying sizes, and the flexibility of the pallet fork is improved.

Description

Technical Field

[0001] The utility model relates to the field of cargo forks, in particular to a cargo fork with adjustable carrying size. Background Art

[0002] In automated warehouses, stackers are essential, and the core component of a stacker is the fork. Automated warehouses can be a few stories high, a dozen stories high, or even dozens of stories high. The stacker's function is to deliver goods to designated locations using the fork.

[0003] A three-section fork is a common telescopic forklift fork. It consists of three sections: the upper fork (also known as the front fork), the middle fork, and the lower fork (also known as the fixed fork). These three sections, along with hundreds of other components such as guide rollers, rack and pinion gears, sprocket chains, guide sliders, limit switches (travel switches), neutral switches (proximity switches), torque limiters, encoders, drivers, motors, reducers, couplings, and more, form a complete telescopic mechanism.

[0004] The existing telescopic fork structure has the following shortcomings:

[0005] 1. Because the lower fork arms of existing telescopic forks are directly fixed to the top of the loading platform, the spacing between the two lower forks may not always be sufficient to accommodate changes in the size of the cargo being handled. 2. When adjusting the fork's handling capacity, the accuracy of the adjustment is not available in real time, making it impossible to quickly adjust the fork's handling distance based on the cargo size, resulting in low adjustment efficiency. Summary of the Invention

[0006] The purpose of the utility model is to provide a cargo fork with adjustable carrying size.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] Provided is a fork with adjustable handling size, comprising a base plate and a fork body, wherein four guide rails are symmetrically arranged on the top of the base plate, and a slider is slidably arranged on the top of each guide rail;

[0009] Also includes a controller, an adjustment mechanism and a locking mechanism;

[0010] The adjustment mechanism is located on the top of the base plate. The adjustment mechanism includes a drive assembly, a rotating assembly, and two connecting rods. The drive assembly is located on the top of the base plate, the rotating assembly is located next to the drive assembly, and the two connecting rods are located between the rotating assembly and the fork body.

[0011] The locking mechanism is arranged on the outer wall of the fork body, and the locking mechanism includes a sleeve, a spline and a clamping assembly. The first half shaft and the second half shaft are symmetrically arranged on the outer wall of the fork body. The sleeve is fixedly arranged at the end of the second half shaft away from the fork body. The spline is fixedly arranged on the outer wall of the first half shaft. The inner wall of the sleeve is provided with a keyway for the spline to be inserted. The clamping assembly is arranged between the sleeve and the first half shaft. The drive assembly is electrically connected to the controller.

[0012] Preferably, the fork body includes two lower forks, two middle forks and two upper forks, each lower fork is fixed on the top of two of the sliders through two connecting columns, each middle fork is slidably arranged on the top of one of the lower forks, each upper fork is slidably arranged on the top of one of the middle forks, and a cover is fixedly provided at the bottom of each lower fork, a sprocket is vertically provided inside each cover, and a first half-shaft and a second half-shaft are respectively fixed at the center of the two sprockets, a reduction motor is inserted on the outer wall of one of the covers, and the output end of the reduction motor is fixedly connected to the end of the first half-shaft away from the sleeve.

[0013] Preferably, the drive assembly includes an electric push rod, a rack and a slide rail. The slide rail is fixed to the top of the base plate through two support plates. The rack is slidably arranged inside the slide rail. The electric push rod is inserted into the outer wall of the slide rail, and its output end is fixedly connected to one end of the rack. The electric push rod is electrically connected to the controller.

[0014] Preferably, the rotating assembly includes a gear, a rotating shaft and a turntable. The rotating shaft is rotatably arranged on the top of the base plate. The turntable and the gear are fixed on the outer wall of the rotating shaft. The gear is meshed with the rack. The turntable and each lower fork arm are respectively hinged to the two ends of each connecting rod.

[0015] Preferably, a guide rod is fixedly provided at one end of the rack away from the electric push rod, and a telescopic spring is sleeved on the outer wall of the guide rod.

[0016] Preferably, the clamping assembly includes a hemispherical buckle, a clamping spring and a circular slide. A circular through hole is provided on the inner wall of the first half shaft. The circular slide is slidably arranged inside the circular through hole through two limit bars. The clamping spring is vertically inserted into the inside of the circular through hole. The bottom of the circular slide and the inner wall of the circular through hole respectively contact the two ends of the clamping spring. The hemispherical buckle is fixed to the top of the circular slide through a connecting rod. Several clamping grooves for the hemispherical buckle to be clamped are provided at equal intervals on the outer wall of the sleeve. The hemispherical buckle is clamped with one of the clamping grooves.

[0017] Preferably, a conical indicator rod is fixedly provided on the outer wall of one of the lower fork arms, a scale value is provided on the top of the base plate, and the conical indicator rod faces the scale value.

[0018] Beneficial effects of the utility model:

[0019] The utility model designs an adjustment mechanism, namely a drive assembly, a rotating assembly and two connecting rods, which can adjust the distance between the two lower fork arms in real time according to the size of the goods to be transported, thereby adjusting the distance between the two upper fork arms, realizing the adjustment requirements of goods of different transport sizes, and improving the flexibility of the fork.

[0020] The utility model designs a locking mechanism, a sleeve, a spline and a clamping assembly, which exerts a lateral limiting effect on the two lower fork arms while adjusting the handling size, thereby improving the stability of the adjustment, making the fork practical, and at the same time not damaging the fork, thereby playing a protective role.

[0021] The utility model is designed with a tapered indicator rod and a scale value. When the two lower fork arms move away from each other, since one of the lower fork arms is fixedly connected to the tapered indicator rod, the top of the base plate is provided with a scale value, and the tapered indicator rod faces the scale value, the sliding distance of the lower fork arm can be obtained by the sliding stroke of the tapered indicator rod above the scale value, thereby improving the accuracy of handling size adjustment and facilitating rapid adjustment of the distance between the two lower fork arms according to the size of the goods, that is, rapid adjustment of the distance between the two upper fork arms, thereby improving the adjustment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings in the embodiments of the present invention.

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model Figure 1 ;

[0024] Figure 2 It is a front view of the utility model;

[0025] Figure 3 for Figure 2 A magnified view of point A in the figure;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the utility model Figure 2 ;

[0027] Figure 5 for Figure 4 Enlarged view of point B in FIG.

[0028] Figure 6 This is a schematic cross-sectional view of the slide rail and two lower fork arms of the utility model;

[0029] Figure 7 for Figure 6 Enlarged view of point C in the figure;

[0030] In the figure: fork body 1, slider 2, connecting rod 3, sleeve 4, spline 5, clamping assembly 6, first half shaft 7, second half shaft 8, lower fork arm 9, middle fork arm 10, upper fork arm 11, cover 12, reduction motor 13, electric push rod 14, rack 15, slide rail 16, gear 17, rotating shaft 18, turntable 19, telescopic spring 20, hemispherical buckle 21, tightening spring 22, circular slide plate 23, slot 24, tapered indicator rod 25, scale value 26. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0032] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product.

[0033] Reference Figures 1 to 7 As shown, a fork with adjustable handling size includes a base plate and a fork body 1. Four guide rails are symmetrically arranged on the top of the base plate, and a slider 2 is slidably provided on the top of each guide rail.

[0034] Also includes a controller, an adjustment mechanism and a locking mechanism;

[0035] The adjustment mechanism is located on the top of the base plate. The adjustment mechanism includes a drive assembly, a rotating assembly, and two connecting rods 3. The drive assembly is located on the top of the base plate, the rotating assembly is located next to the drive assembly, and the two connecting rods 3 are located between the rotating assembly and the fork body 1.

[0036] The locking mechanism is provided on the outer wall of the fork body 1 and includes a sleeve 4, a spline 5, and a clamping assembly 6. A first half-shaft 7 and a second half-shaft 8 are symmetrically arranged on the outer wall of the fork body 1. The sleeve 4 is fixedly provided at the end of the second half-shaft 8 away from the fork body 1. The spline 5 is fixedly provided on the outer wall of the first half-shaft 7. A keyway for inserting the spline 5 is provided on the inner wall of the sleeve 4. The clamping assembly 6 is provided between the sleeve 4 and the first half-shaft 7. The drive assembly is electrically connected to the controller.

[0037] Reference Figures 1 to 7As shown, the fork body 1 includes two lower fork arms 9, two middle fork arms 10 and two upper fork arms 11. Each lower fork arm 9 is fixed to the top of two sliders 2 through two connecting columns. Each middle fork arm 10 is slidably arranged on the top of one of the lower fork arms 9. Each upper fork arm 11 is slidably arranged on the top of one of the middle fork arms 10. A cover 12 is fixed to the bottom of each lower fork arm 9. A sprocket is vertically arranged inside each cover 12. The first half shaft 7 and the second half shaft 8 are fixed to the top of the two sprockets respectively. In the center, a reduction motor 13 is inserted into the outer wall of one of the cover shells 12, and the output end of the reduction motor 13 is fixedly connected to the end of the first half-shaft 7 away from the sleeve 4. The output end of the reduction motor 13 is fixedly connected to one end of the first half-shaft 7 through a coupling, thereby driving the sprocket on the first half-shaft 7 to rotate. The first half-shaft 7 drives the sleeve 4, the second half-shaft 8 and the sprocket thereon to rotate through the spline 5, thereby driving the transmission structure inside the two lower fork arms 9 to operate, thereby realizing the sliding adjustment of the two middle fork arms 10 and the upper fork arm 11.

[0038] Reference Figures 1 to 7 As shown, the drive assembly includes an electric push rod 14, a rack 15 and a slide rail 16. The slide rail 16 is fixed to the top of the base plate through two support plates. The rack 15 is slidably arranged inside the slide rail 16. The electric push rod 14 is inserted into the outer wall of the slide rail 16. Its output end is fixedly connected to one end of the rack 15. The electric push rod 14 is electrically connected to the controller. When the size of the cargo increases, the electric push rod 14 is started by the controller, so that its output end contracts toward the end away from the slide rail 16. Since its output end is fixedly connected to the rack 15, the rack 15 is slidably connected to the slide rail 16, so that the rack 15 slides inside the slide rail 16 toward the end away from the guide rod.

[0039] Reference Figures 1 to 7 As shown, the rotating assembly includes a gear 17, a rotating shaft 18 and a turntable 19. The rotating shaft 18 is rotatably arranged on the top of the base plate. The turntable 19 and the gear 17 are fixedly arranged on the outer wall of the rotating shaft 18. The gear 17 is meshed with the rack 15. The turntable 19 and each lower fork arm 9 are respectively hinged to the two ends of each connecting rod 3. When the rack 15 slides inside the slide rail 16 toward the end away from the guide rod, since the gear 17 is rotatably connected to the base plate through the rotating shaft 18, the rack 15 is meshed with the gear 17, and the turntable 19 is fixedly connected to the rotating shaft 18, thereby driving the turntable 19 to rotate counterclockwise through the rotating shaft 18. The turntable 19 and each lower fork arm 9 are respectively hinged to the two ends of each connecting rod 3. Since each lower fork arm 9 is fixedly connected to two of the sliders 2 through two connecting columns, and each slider 2 is slidably connected to a guide rail, the two lower fork arms 9 are driven away from each other through the two connecting rods 3, thereby realizing the mutual distance between the two upper fork arms 11, meeting the requirements of supporting larger-sized goods.

[0040] Reference Figures 1 to 7As shown, a guide rod is fixed to the end of the rack 15 away from the electric push rod 14, and a telescopic spring 20 is sleeved on the outer wall of the guide rod. When the rack 15 slides inside the slide rail 16 toward the end away from the guide rod, the telescopic spring 20 changes from an initial state to a taut state, starting a buffering effect, so that the rack 15 drives the gear 17 to rotate slowly counterclockwise, thereby driving the two connecting rods 3 to slowly push the two lower fork arms 9 through the turntable 19, ensuring the stability of the handling size adjustment.

[0041] Reference Figures 1 to 7 As shown, the clamping assembly 6 includes a hemispherical clamp 21, a tightening spring 22 and a circular slide 23. A circular through hole is provided on the inner wall of the first semi-axle 7. The circular slide 23 is slidably arranged inside the circular through hole through two limit bars. The tightening spring 22 is vertically inserted into the circular through hole. The bottom of the circular slide 23 and the inner wall of the circular through hole respectively contact the two ends of the tightening spring 22. The hemispherical clamp 21 is fixed to the top of the circular slide 23 through a connecting rod. A plurality of clamping grooves 24 for the hemispherical clamp 21 to be clamped are provided at equal intervals on the outer wall of the sleeve 4. The hemispherical clamp 21 is clamped with one of the clamping grooves 24. In the process of the two lower fork arms 9 moving away from each other, the first semi-axle 7 drives the hemispherical clamp 21 to move away from the second semi-axle 8 When the hemispherical buckle 21 is pulled at one end and is resisted by the degassing slot 24 of the sleeve 4, it slides to the inside of the circular through hole through the circular slide plate 23 and the connecting rod under the contraction action of the tightening spring 22. When the hemispherical buckle 21 slides to align with the next slot 24, the hemispherical buckle 21 is no longer resisted, so that the tightening spring 22 is reset to push the circular slide plate 23 and the connecting rod to cause the hemispherical buckle 21 to extend into the inside of the slot 24, thereby achieving the clamping connection and achieving the effect of locking the first semi-axle 7 and the second semi-axle 8. Therefore, the normal use of the fork will not be affected after the carrying size is adjusted. At the same time, a lateral limiting effect is applied during the adjustment to improve the stability of the adjustment, making the fork have certain practicality.

[0042] Reference Figures 1 to 7 As shown, a conical indicator rod 25 is fixedly provided on the outer wall of one of the lower fork arms 9, a scale value 26 is provided on the top of the base plate, and the conical indicator rod 25 is directed toward the scale value 26. When the two lower fork arms 9 move away from each other, since one of the lower fork arms 9 is fixedly connected to the conical indicator rod 25, a scale value 26 is provided on the top of the base plate, and the conical indicator rod 25 is directed toward the scale value 26, the sliding distance of the lower fork arm 9 can be obtained by the sliding stroke of the conical indicator rod 25 above the scale value 26, thereby improving the accuracy of the handling size adjustment.

Claims

1. A fork with adjustable handling size, comprising a base plate and a fork body (1), wherein four guide rails are symmetrically arranged on the top of the base plate, and a slider (2) is slidably arranged on the top of each guide rail, characterized in that: Also includes a controller, an adjustment mechanism and a locking mechanism; The adjustment mechanism is arranged on the top of the base plate, and the adjustment mechanism includes a driving assembly, a rotating assembly, and two connecting rods (3). The driving assembly is arranged on the top of the base plate, the rotating assembly is arranged beside the driving assembly, and the two connecting rods (3) are arranged between the rotating assembly and the fork body (1); The locking mechanism is arranged on the outer wall of the fork body (1), and the locking mechanism includes a sleeve (4), a spline (5) and a clamping assembly (6). A first semi-shaft (7) and a second semi-shaft (8) are symmetrically arranged on the outer wall of the fork body (1). The sleeve (4) is fixedly arranged at one end of the second semi-shaft (8) away from the fork body (1). The spline (5) is fixedly arranged on the outer wall of the first semi-shaft (7). A keyway for plugging the spline (5) is provided on the inner wall of the sleeve (4). The clamping assembly (6) is arranged between the sleeve (4) and the first semi-shaft (7). The drive assembly is electrically connected to the controller.

2. The transport size adjustable fork according to claim 1, characterized in that: The fork body (1) comprises two lower fork arms (9), two middle fork arms (10) and two upper fork arms (11), each lower fork arm (9) is fixed on the top of two sliders (2) through two connecting columns, each middle fork arm (10) is slidably arranged on the top of one of the lower fork arms (9), each upper fork arm (11) is slidably arranged on the top of one of the middle fork arms (10), a cover (12) is fixedly provided at the bottom of each lower fork arm (9), a sprocket is vertically provided inside each cover (12), a first half-shaft (7) and a second half-shaft (8) are respectively fixedly provided at the center of the two sprockets, a reduction motor (13) is inserted on the outer wall of one of the cover shells (12), and an output end of the reduction motor (13) is fixedly connected to an end of the first half-shaft (7) away from the sleeve (4).

3. The transport size adjustable fork according to claim 2, characterized in that: The driving assembly includes an electric push rod (14), a rack (15) and a slide rail (16), wherein the slide rail (16) is fixed on the top of the base plate through two support plates, the rack (15) is slidably arranged inside the slide rail (16), the electric push rod (14) is inserted into the outer wall of the slide rail (16), and its output end is fixedly connected to one end of the rack (15), and the electric push rod (14) is electrically connected to the controller.

4. The transport size adjustable fork according to claim 3, characterized in that: The rotating assembly includes a gear (17), a rotating shaft (18) and a turntable (19). The rotating shaft (18) is rotatably arranged on the top of the base plate. The turntable (19) and the gear (17) are fixed on the outer wall of the rotating shaft (18). The gear (17) is meshed with the rack (15). The turntable (19) and each lower fork arm (9) are respectively hinged to the two ends of each connecting rod (3).

5. The transport size adjustable fork according to claim 4, characterized in that: A guide rod is fixedly provided at one end of the rack (15) away from the electric push rod (14), and a telescopic spring (20) is sleeved on the outer wall of the guide rod.

6. The transport size adjustable fork according to claim 5, characterized in that: The clamping assembly (6) includes a hemispherical clamp (21), a holding spring (22) and a circular slide (23). A circular through hole is provided on the inner wall of the first semi-shaft (7). The circular slide (23) is slidably arranged inside the circular through hole through two limit bars. The holding spring (22) is vertically inserted into the inside of the circular through hole. The bottom of the circular slide (23) and the inner wall of the circular through hole respectively contact the two ends of the holding spring (22). The hemispherical clamp (21) is fixed to the top of the circular slide (23) through a connecting rod. A plurality of slots (24) for the hemispherical clamp (21) to be clamped are provided at equal intervals on the outer wall of the sleeve (4). The hemispherical clamp (21) is clamped to one of the slots (24).

7. The transport size adjustable fork according to claim 6, characterized in that: A conical indicator rod (25) is fixedly provided on the outer wall of one of the lower fork arms (9), a scale value (26) is provided on the top of the bottom plate, and the conical indicator rod (25) faces the scale value (26).

Images