Pull rod structure suitable for tray forklift

Abstract

The pull rod structure comprises a pull rod telescopic structure body, the pull rod telescopic structure body is composed of a pull rod, a telescopic device, a load wheel assembly and a roller assembly, the load wheel assembly and the roller assembly are installed at the two ends of the pull rod respectively, and the roller assembly is fixedly connected with a pallet fork. The load wheel assembly is used as a supporting movable part when making contact with the ground, the pull rod is installed in the pallet fork and is parallel to the pallet fork, hook tongues extending outwards are arranged on the two side bodies of the middle of the pull rod respectively, and each hook tongue is connected with one end of a drag hook parallel to the pull rod through a connecting piece. The other end of the drag hook is connected with one end of the telescopic device, and the other end of the telescopic device is arranged on the pallet fork clamping ring in a sleeving mode. The device has the advantages of simple and reasonable structure, convenience in adjustment, high practicability and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of forklift accessories, and relates to a pull rod structure suitable for pallet forklifts. BACKGROUND

[0002] Forklifts are industrial handling vehicles, and refer to various wheeled handling vehicles for loading, unloading, stacking and short-distance transporting of piece pallet goods. The existing forklifts need to lift the forks according to actual conditions during operation, but the forks are prone to be stuck during lowering, cannot be smoothly lifted and lowered, and often need manual intervention and adjustment, which greatly affects work efficiency.

[0003] Therefore, a pull rod structure suitable for pallet forklifts is designed to overcome the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at overcoming the deficiencies in the prior art, and provides a pull rod structure suitable for pallet forklifts, which has simple and reasonable structure, is convenient to adjust, is highly practical, greatly improves work efficiency and the like.

[0005] The utility model is realized through the following technical scheme: a pull rod structure suitable for pallet forklifts, which comprises a pull rod telescopic structure body installed on a fork, the pull rod telescopic structure body is composed of a pull rod, a telescopic device, a load wheel assembly and a roller assembly, the load wheel assembly and the roller assembly are respectively installed at two ends of the pull rod, wherein the roller assembly is fixedly connected with the fork, the load wheel assembly is in contact with the ground as a supporting movable part, the pull rod is installed in the fork and arranged in parallel with the fork, a hook tongue extending outward is arranged on each side of the middle part of the pull rod, each hook tongue is connected with one end of a pull hook parallel to the pull rod through a connecting piece, the other end of the pull hook is connected with one end of the telescopic device, the other end of the telescopic device is sleeved on a corresponding clasp ring of the fork, when the fork is lowered with the roller assembly as a rotating point, the telescopic device is deformed due to the change of the position of the clasp ring caused by the rotation of the fork, a horizontal pulling force is provided for the pull rod, so that the fork smoothly passes through the dead point position of the pull rod when being lowered.

[0006] As a preferred embodiment, the connecting piece is composed of a flat washer, a spring washer, an adjusting nut and a locking nut, a mounting through hole is arranged on each hook tongue, the pull hook is inserted through the mounting through hole, the flat washer and the spring washer are sleeved on the pull hook on the two sides of the mounting through hole, the locking nut and the adjusting nut are respectively installed on the outer sides of the flat washer and the spring washer, wherein the locking nut is used for locking and fixing, and the adjusting nut is used for adjusting the position of the hook ring, so that the pulling force of the telescopic device is adjusted.

[0007] As preferred: the load wheel assembly is composed of a load wheel support, a pull rod shaft, a load wheel clamping plate and at least one load wheel, the load wheel support is in a U-shaped structure, one end of the load wheel support is movably connected with the pull rod through the pull rod shaft, the load wheel is installed in the load wheel support through the load wheel clamping plate, the angle between the load wheel support and the pull rod is adjusted through the load wheel clamping plate, so that the load wheel is guaranteed to be in contact with the ground, and load wheel shafts are arranged on both sides of the load wheel support and used for being connected with the forks.

[0008] As preferred: the roller assembly is composed of a roller support, a rear rotating seat shaft, a rear rotating seat, a roller, a roller shaft and a supporting wheel, the roller support is in a U-shaped structure, the roller support is fixedly connected with the pull rod, the roller is installed at one end of the roller support away from the pull rod through the roller shaft, the roller is in contact with the roller limiting block installed on both sides of the frame, the rear rotating seat in a U-shaped structure is installed in the roller support through the rear rotating seat shaft, the supporting wheel is installed in the middle of the rear rotating seat in a U-shaped structure through a pin shaft, the rear rotating seat is fixedly connected with the forks, and the rear rotating seat rotates along the rear rotating seat shaft, so that the forks are lifted and lowered with the rear rotating seat shaft as the center.

[0009] As preferred: the telescopic device is a telescopic oil cylinder or a tension spring, a compression spring or a gas spring provided with a carabiner at both ends.

[0010] As preferred: the shaft centers of the locking nut, the flat washer, the spring washer and the adjusting nut are on a straight line, so that the telescopic device provides a transverse tension for the pull rod.

[0011] As preferred: first and second inclined surfaces are arranged on the contact surfaces of the roller limiting block and the roller respectively.

[0012] As preferred: the models of the adjusting nut and the locking nut are both M10.

[0013] The beneficial effects of the utility model are as follows:

[0014] The pull rod structure suitable for the pallet fork truck designed in the utility model can increase the horizontal right tension F, (the tension can be adjusted according to specific requirements), the pull rod structure can make the forks smoothly descend when descending, the pull rod structure has the advantages of convenient adjustment and simple function structure, and the pull rod structure suitable for the pallet fork truck designed in the utility model also plays a certain buffering and damping role in the process of the forks ascending and descending, in addition, if the forks have the problem of being stuck at a dead point, the pull rod structure can also provide tension (such as F), so that the forks can smoothly pass the dead point. DRAWINGS

[0015] Figure 1 It is a whole structure schematic view of the utility model;

[0016] Figure 2 is an enlarged view of A in FIG. Figure 1 is an enlarged view of A in FIG.

[0017] Figure 3 is a schematic view of rearward retraction;

[0018] Figure 4 is a working state diagram of the utility model;

[0019] Figure 5 is a schematic view of a roller limiting block in the utility model;

[0020] Figure 6 is a schematic view of the connection between the pull rod, the telescopic device and the forks in the utility model;

[0021] Figure 7 is step 1 of the operation of the utility model on a forklift truck;

[0022] Figure 8 is step 2 of the operation of the utility model on a forklift truck;

[0023] Figure 9 is step 3 of the operation of the utility model on a forklift truck;

[0024] Figure 10 is step 4 of the operation of the utility model on a forklift truck. DETAILED DESCRIPTION

[0025] In order for those skilled in the art to more clearly understand the purpose, technical scheme and advantages of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "up", "down", "left", "right", "inner", "outer", "horizontal", "vertical" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model, and does not indicate or imply that the device or element indicated must have a particular orientation, so it cannot be understood as a limitation on the utility model.

[0027] The utility model will be described in detail below in conjunction with the accompanying drawings: as Figures 1-3As shown, a pull rod structure suitable for pallet fork truck, comprising a pull rod telescopic structure body 1 installed on the fork 6, the pull rod telescopic structure body 1 is composed of a pull rod 2, a telescopic device, a load wheel assembly 4 and a roller assembly 5, the load wheel assembly 4 and the roller assembly 5 are respectively installed on both ends of the pull rod 2, wherein the roller assembly 5 is fixedly connected with the fork 6, the load wheel assembly 4 is in contact with the ground as a supporting movable part, the pull rod 2 is installed in the fork 6 and arranged parallel to the fork 6, a hook tongue 7 extending outward is arranged on each side of the middle part of the pull rod 2, each hook tongue 7 is connected with one end of a pull hook 8 parallel to the pull rod 2 through a connecting piece, the other end of the pull hook 8 is connected with one end of the telescopic device, the other end of the telescopic device is sleeved on the corresponding clasp ring 10 of the fork 6, when the fork 6 is lowered with the roller assembly 5 as the rotation point, the telescopic device deforms due to the change of the position of the clasp ring 10 caused by the rotation of the fork 6, thereby providing a transverse pulling force for the pull rod 2, so that the fork 6 smoothly passes through the dead point position of the pull rod 2 when it is lowered.

[0028] The connecting piece is composed of a flat washer 11, a spring washer 12, an adjusting nut 13 and a locking nut 14, a mounting through hole is arranged on each hook tongue 7, the pull hook 8 is inserted through the mounting through hole, the flat washer 11 and the spring washer 12 are sleeved on the pull hook 8 on both sides of the mounting through hole, the locking nut 14 and the adjusting nut 13 are respectively installed on the outside of the flat washer 11 and the spring washer 12, wherein the locking nut 14 is used for locking and fixing, and the adjusting nut 13 is used for adjusting the position of the hook ring 9, thereby adjusting the pulling force of the telescopic device.

[0029] The load wheel assembly 4 is composed of a load wheel support 15, a pull rod shaft 16, a load wheel clamping plate 17 and at least one load wheel 18, the load wheel support 15 is in U-shaped structure, one end of the load wheel support 15 is movably connected with the pull rod 2 through the pull rod shaft 16, the load wheel 18 is installed in the load wheel support 15 through the load wheel clamping plate 17, the angle between the load wheel support 15 and the pull rod 2 is adjusted through the load wheel clamping plate 17, thereby ensuring that the load wheel 18 is in contact with the ground; load wheel shafts 24 are further arranged on both sides of the load wheel support 15, which are used for connecting with the fork 6.

[0030] The roller assembly 5 is composed of a roller support 19, a rear rotating shaft 20, a rear rotating seat 21, a roller 22, a roller shaft 23 and a supporting wheel 26, the roller support 19 is in a U-shaped structure, the roller support 19 is fixedly connected with the pull rod 2, the roller 22 is installed at one end of the roller support 19 away from the pull rod 2 through the roller shaft 23, the roller 22 is in contact with the roller limiting block 25 installed on both sides of the frame, the rear rotating seat 21 in a U-shaped structure is installed in the roller support 19 through the rear rotating shaft 20, the supporting wheel 26 is installed in the middle of the rear rotating seat 21 in a U-shaped structure through a pin shaft, the rear rotating seat 21 is fixedly connected with the fork 6, and the rear rotating seat 21 rotates along the rear rotating shaft 20, so that the fork 6 is lifted with the rear rotating shaft 20 as the center.

[0031] The utility model can adjust the pulling force of the pull rod through the adjusting nut, and the telescopic device provides a horizontal pulling force F for the pull rod when the pull rod structure is lowered (see Figure 3 ), so that the fork can be smoothly lowered.

[0032] The utility model discloses a connecting relationship between the fork and the pull rod telescopic structure is shown in the figure, the A point (rear rotating seat 21) and the D point (connecting column 24) are connected with the fork 6, the stability of the pull rod telescopic structure after installation can be guaranteed through the two-point connection mode, the B point is the rear rotating shaft 20, and the C point is the roller 22. Figure 4 The utility model discloses a connecting relationship between the fork and the pull rod telescopic structure is shown in the figure, the A point (rear rotating seat 21) and the D point (connecting column 24) are connected with the fork 6, the stability of the pull rod telescopic structure after installation can be guaranteed through the two-point connection mode, the B point is the rear rotating shaft 20, and the C point is the roller 22. Figure 5 The utility model discloses a connecting relationship between the fork and the pull rod telescopic structure is shown in the figure, the A point (rear rotating seat 21) and the D point (connecting column 24) are connected with the fork 6, the stability of the pull rod telescopic structure after installation can be guaranteed through the two-point connection mode, the B point is the rear rotating shaft 20, and the C point is the roller 22.

[0033] As shown in Figure 6 , the roller limiting block 25 and the roller 22 are provided with a first inclined surface 30 and a second inclined surface 27 on the contact surface respectively.

[0034] As shown in Figures 7-10 , the working process of the utility model is as follows:

[0035] S1: when the fork 6 normally drives, the load wheel 18 and the driving wheel 29 touch the ground, and at this time, the fork 6 is in a high position; at this time, the roller 22 is on the upper side of the second inclined surface 27.

[0036] S2: before the fork is taken to the cross-shaped tray, the fork 6 is first lowered, and the load wheel 18, the driving wheel 29 and the supporting wheel 26 are landed at the same time, at this time, the roller 22 is located at the lower side of the second inclined surface 27 of the roller limiting block 25;

[0037] Between S1 and S2, the roller rolls on the second inclined surface 27;

[0038] S3: after the three groups of wheels land at the same time, continue to lower, at this time, the supporting wheel 26 and the driving wheel 29 land, and the load wheel 18 starts to shrink to the inside of the fork 6 until the load wheel 18 is completely retracted into the inside of the fork 6, at this time, the roller 22 is located at the first inclined surface 30;

[0039] S4: start to fork until the cross-shaped tray 28 touches the baffle of the fork 6 and stops forking, at this time, the upper surface of the fork 6 and the upper surface of the groove of the fork 6 have a gap;

[0040] S5: after the fork 6 enters the groove of the fork 6, start to lift, and lift to the three groups of wheels landing at the same time, at this time, the upper surface of the fork 6 and the upper surface of the groove of the fork have a certain gap;

[0041] S6: the fork 6 continues to lift, at this time, the load wheel 18 and the driving wheel 29 land, and the supporting wheel 26 is off the ground and shrinks upward, during the lifting process, the upper surface of the fork 6 will contact the upper surface of the groove, and then the fork 6 will lift the cross-shaped tray 28 together, until the fork 6 is lifted to the highest position, and then starts to transport goods.

[0042] The utility model aims at solving the problem that the fork is easy to be stuck when naturally descending, and the pull rod telescopic structure provides a transverse pulling force for the pull rod structure to make it smoothly descend. In addition, if the fork structure is stuck at the dead point, the pull rod structure can also provide a pulling force to make the fork smoothly pass the dead point.

[0043] The specific embodiments described in the present application are only illustrative of the principles and effects of the utility model, and are not used to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. A pull rod structure suitable for a pallet fork truck, comprising a pull rod telescopic structure body (1) mounted on a fork (6), characterized in that: The telescopic structure body (1) is composed of a pull rod (2), a telescopic device, a load wheel assembly (4) and a roller assembly (5), the load wheel assembly (4) and the roller assembly (5) are respectively installed at two ends of the pull rod (2), wherein the roller assembly (5) is fixedly connected with a fork (6), the load wheel assembly (4) is in contact with the ground as a supporting movable part, the pull rod (2) is installed in the fork (6) and is arranged in parallel with the fork (6), a hook tongue (7) extending outward is arranged on each side of the middle part of the pull rod (2), each hook tongue (7) is connected with one end of a pull hook (8) parallel with the pull rod (2) through a connecting piece, the other end of the pull hook (8) is connected with one end of the telescopic device, the other end of the telescopic device is sleeved on a corresponding clamping ring (10) of the fork (6), when the fork (6) is lowered with the roller assembly (5) as a rotating point, the telescopic device is deformed due to the change of the position of the clamping ring (10) caused by the rotation of the fork (6), thereby providing a transverse tension for the pull rod (2), so that the fork (6) smoothly passes through the dead point position of the pull rod (2) when being lowered.

2. The pull rod structure suitable for a pallet fork truck according to claim 1, characterized in that: The connecting piece is composed of a flat washer (11), a spring washer (12), an adjusting nut (13) and a locking nut (14), a mounting through hole is arranged on each hook tongue (7), the pull hook (8) is inserted through the mounting through hole, the flat washer (11) and the spring washer (12) are sleeved on the pull hook (8) on the two sides of the mounting through hole, the locking nut (14) and the adjusting nut (13) are respectively installed on the outer sides of the flat washer (11) and the spring washer (12), wherein the locking nut (14) is used for locking and fixing, and the adjusting nut (13) is used for adjusting the position of the hook ring (9), so as to adjust the tension of the telescopic device.

3. The pull rod structure suitable for a pallet fork truck according to claim 1, characterized in that: The load wheel assembly (4) is composed of a load wheel support (15), a pull rod shaft (16), a load wheel clamping plate (17) and at least one load wheel (18), the load wheel support (15) is in a U-shaped structure, one end of the load wheel support (15) is movably connected with the pull rod (2) through the pull rod shaft (16), the load wheel (18) is installed in the load wheel support (15) through the load wheel clamping plate (17), the angle between the load wheel support (15) and the pull rod (2) is adjusted through the load wheel clamping plate (17), so as to ensure that the load wheel (18) is in contact with the ground; load wheel shafts (24) are further arranged on the two sides of the load wheel support (15), and are used for connecting with the fork (6).

4. The pull rod structure suitable for a pallet fork truck according to claim 1, characterized in that: The roller assembly (5) is composed of a roller support (19), a rear rotating shaft (20), a rear rotating seat (21), a roller (22), a roller shaft (23) and a supporting wheel (26), the roller support (19) is in a U-shaped structure, the roller support (19) is fixedly connected with the pull rod (2), the roller (22) is installed on the end of the roller support (19) away from the pull rod (2) through the roller shaft (23), the roller (22) is in contact with the roller limiting block (25) installed on both sides of the frame, the rear rotating seat (21) in a U-shaped structure is installed in the roller support (19) through the rear rotating shaft (20), the supporting wheel (26) is installed in the middle of the rear rotating seat (21) in a U-shaped structure through a pin shaft, the rear rotating seat (21) is fixedly connected with the fork (6), the rear rotating seat (21) rotates along the rear rotating shaft (20), thereby driving the fork (6) to lift along the rear rotating shaft (20) as the center.

5. The pull rod structure suitable for a pallet fork truck according to claim 1, characterized in that: The telescopic device is a telescopic oil cylinder or a tension spring, a compression spring or a gas spring provided with a shackle (9) at both ends.

6. The pull rod structure suitable for a pallet fork truck according to claim 2, characterized by: The shaft centers of the locking nut (14), the flat washer (11), the spring washer (12) and the adjusting nut (13) are on a straight line, so as to ensure that the telescopic device provides a transverse tension to the pull rod.

7. The pull rod structure suitable for a pallet fork truck according to claim 4, characterized in that: The first inclined surface (30) and the second inclined surface (27) are respectively arranged on the upper and lower contact surfaces of the roller limiting block (25) and the roller (22).

8. The pull rod structure suitable for a pallet fork truck according to claim 6, characterized in that: The models of the adjusting nut (13) and the locking nut (14) are both M10.

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