A fork frame

Abstract

The present application relates to the field of forklift accessories, in particular to a fork frame, comprising a transverse frame for mounting a fork, a backstop frame mounted on the transverse frame, a driving mechanism for driving the transverse frame to move, and a mounting frame connected between a forklift door frame and the driving mechanism, wherein the transverse frame comprises: a side plate, the side plate is fixedly connected to the backstop frame; a support rod, the support rod is connected to the side plate and is used to mount the driving mechanism; the driving mechanism comprises: a piston rod, the piston rod is fixedly connected to the side plate; an oil cylinder, the oil cylinder is connected to the mounting frame, and the oil cylinder is embedded in the support rod and slidably connected to the support rod, the support rod and the embedded driving mechanism replace the crossbeam structure, the structure of the fork frame is simplified, the operating field of the staff is improved, and the safety of the goods during translation is improved.

Description

Technical Field

[0001] The present application relates to the field of forklift accessories, and in particular to a fork frame. Background Art

[0002] The fork frame is an important part of the forklift. The fork frame is installed on the front side of the forklift mast, and the fork is installed on the front side of the fork frame. It is used to lift and carry goods. The fork frame bears the bending moment generated when the fork is fully loaded with goods. Generally, a crossbeam is installed on the fork frame to improve the structural strength of the fork frame.

[0003] In the prior art, in order to make the fork suitable for transporting goods of different sizes and types, a forklift generally uses a cylinder to drive the side shift frame in the fork frame to move horizontally, and the fork is installed on the side shift frame, so as to achieve lateral translation of the fork to transport the goods by the fork; the cylinder is installed on the crossbeam in an external mounting manner, which makes the structure of the fork frame complicated, reduces the field of view of the operator on the forklift for the loaded goods, expands the blind spot of the field of view, increases safety hazards, and is prone to collisions during the transportation of goods. Summary of the invention

[0004] In order to alleviate the problem that the crossbeam and the oil cylinder in the fork frame affect the field of vision of the driving operator, the present application provides a fork frame.

[0005] The fork frame provided in this application adopts the following technical solution:

[0006] A fork frame comprises a transverse frame on which a fork is mounted, a backstop shelf mounted on the transverse frame, a driving mechanism for driving the transverse frame to move, and a mounting frame connected between a forklift door frame and the driving mechanism. The transverse frame comprises: a side plate, which is fixedly connected to the backstop shelf; a support rod, which is connected to the side plate and is used to mount the driving mechanism; the driving mechanism comprises: a piston rod, which is fixedly connected to the side plate; and an oil cylinder, which is connected to the mounting frame and is embedded in the support rod and slidably connected to the support rod.

[0007] By adopting the above technical solution, the cylinder is embedded in the support rod in the transverse frame. Compared with the external installation of the cylinder on the support rod, the obstruction of the driving operator's field of vision by the cylinder and the support rod is reduced, and the blind spot of vision is reduced. In addition, the cylinder and the support rod are slidably connected, so that when the cylinder drives the piston rod to move and drives the side plate and the support rod to move horizontally, the cylinder can slide relative to the support rod to avoid the drive mechanism and the transverse frame structure from getting stuck.

[0008] Further preferably, a slot for clamping the oil cylinder is provided in the support rod, and an adjustment gap is reserved between the oil cylinder and the inner wall of the slot.

[0009] By adopting the above technical solution, a slot is opened in the support rod for installing the cylinder. When the forklift is loading and unloading goods, vertical movement will occur between the fork frame and the forklift mast, and movement will also occur between the support rod on the transverse frame and the cylinder. In order to avoid collision between the cylinder and the support rod, an adjustment gap is reserved between the cylinder and the slot.

[0010] Further preferably, an anti-slip groove is provided on the inner wall of the slot, and a clamping protrusion for clamping the anti-slip groove is fixedly provided on the oil cylinder.

[0011] By adopting the above technical solution, since the adjustment gap is set in the slot, there is a hidden danger that the oil cylinder will fall out of the slot. A clamping protrusion is set on the oil cylinder and an anti-falling groove is set on the slot, thereby preventing the oil cylinder from falling out of the slot.

[0012] Further preferably, a cushion block is provided on the outer surface of the oil cylinder, and the cushion block contacts the inner wall of the clamping groove and / or the anti-slip groove.

[0013] By adopting the above technical solution, a pad is set on the surface of the cylinder to contact the inner wall of the slot and the anti-slip groove during movement to prevent the cylinder from directly colliding with the support rod. In addition, during the movement, the pad and the inner wall of the slot and the anti-slip groove will slide relative to each other, and the pad can be made of wear-resistant material.

[0014] Further preferably, the support rod is slidably connected to the side plate and the oil cylinder is slidably connected to the mounting frame, an adjustment mechanism for driving the support rod to slide is fixedly provided on the side plate, a through groove is opened on the side plate, the piston rod slides into the through groove and is fixedly connected to the side plate by fasteners.

[0015] By adopting the above technical scheme, the support rod is slidably connected to the side plate, the oil cylinder is slidably connected to the mounting frame, and grooves are opened on the side plate to allow the piston rod to slide in cooperation with the through grooves. An adjustment mechanism is provided to drive the support rod, the oil cylinder and the piston rod to slide along the side plate, and the installation positions of the support rod, the oil cylinder and the piston rod are adjusted, thereby adjusting the position of the support rod, the oil cylinder and the piston rod that blocks the field of vision of the driving operator. After the position is adjusted, the piston rod is fixed to the side plate by fasteners.

[0016] Further preferably, a connecting groove is provided on the mounting frame, a reel is slidably provided in the connecting groove, a connecting plate is fixedly provided on the oil cylinder, and the reel is fixedly connected to the connecting plate.

[0017] By adopting the above technical solution, the reel is slidably connected to the connecting groove, the connecting plate is fixedly connected to the oil cylinder, and the reel is fixedly connected to the connecting plate. The reel slides along the connecting groove to guide the adjustment and sliding of the oil cylinder, and can prevent the oil cylinder from detaching from the mounting frame.

[0018] Further preferably, the reel comprises two fixed plates and a reel rotatably connected between the two fixed plates, a friction pad is provided on the outer circumference of the reel, and one of the fixed plates is fixedly connected to the connecting plate.

[0019] By adopting the above technical solution, a friction pad is arranged on the reel of the reel, and the friction pad is used to contact the wall of the connecting groove, providing friction force for buffering when the reel slides along the connecting groove, thereby preventing the support rod, oil cylinder and piston rod from sliding too fast.

[0020] It is further preferred that the side walls of the connecting groove along the sliding direction of the reel are inclined inwardly, and a hook is fixedly provided on the inner wall of the connecting groove on the opposite side of the sliding direction of the reel. The friction pad is wound on the reel, one end of the friction pad is fixedly connected to the reel, and the other end of the friction pad is connected to the hook.

[0021] By adopting the above technical scheme, the side walls of the connecting groove along the sliding direction of the reel are inclined inwardly, so that when the adjustment mechanism fails, the reel can be prevented from sliding freely and quickly to prevent accidents, thereby improving safety; in addition, during normal use, the distance between the two side walls of the connecting groove becomes smaller. In order to enable the reel to slide along the connecting groove during normal use, the friction pad is wound on the reel, one end is fixed to the reel, and the other end is hung on the hook, and the hook is fixed on the connecting groove wall on the opposite side of the reel sliding direction, so that when the reel slides, the friction pad can be unfolded to reduce the reel diameter; and the friction pad is connected to the hook to play a certain suspending role.

[0022] Further preferably, a guide piece is fixedly provided between the end surfaces of the two fixing plates facing the hook, and a guide groove facing the hook and used for passing the friction pad is provided in the guide piece.

[0023] By adopting the above technical solution, a guide member is provided, and a guide groove is opened on the guide member for passing the friction pad, so that the friction pad faces the hook, so that the hook's hanging force on the reel is just opposite to the sliding direction of the reel.

[0024] Further preferably, a groove is provided in the fixed plate, a torsion plate is rotatably connected in the groove, the reel is fixedly connected to the torsion plate, and a rotation damper is connected between the torsion plate and the fixed plate.

[0025] By adopting the above technical solution, a rotation damping is set between the torsion plate and the fixed plate. When the friction pad is unfolded, the torsion plate is driven to rotate by the rotation of the reel, so that the rotation damping is twisted and has elastic force. When the adjustment mechanism drives the support rod, the cylinder and the piston rod to move in the opposite direction and reset, the torsion plate and the reel are driven to rotate in the opposite direction under the action of the rotation damping elastic force, so that the friction pad is rewound onto the reel.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. In this application, the support rod and the embedded drive mechanism replace the crossbeam structure, simplifying the structure of the fork frame, improving the operator's operating field of vision, and improving the safety of cargo translation;

[0028] 2. In the further configuration of the present application, a bidirectional oil cylinder is provided to drive the piston rod to translate in both directions, so as to realize the bidirectional translation of the side plate, thereby ensuring the translation range of the transverse frame and meeting the use requirements;

[0029] 3. In a further configuration of the present application, a groove and an adjustment slot are provided in the support rod, so that the oil cylinder and the support rod are embedded in each other, and there is a movement space between the oil cylinder and the support rod to avoid collision between the oil cylinder and the support rod;

[0030] 4. In a further configuration of the present application, an adjustment mechanism is provided to drive the support rod and the cylinder to translate relative to the mounting frame, and the positions of the support rod and the cylinder relative to the mounting frame are adjusted to achieve the effect of field of view adjustment. A connecting plate, a connecting groove and a reel are provided between the mounting frame and the cylinder for sliding guidance, and a friction pad is provided on the reel to perform friction buffering for the relative sliding of the cylinder and the mounting frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional structural diagram of a fork frame;

[0032] Figure 2 yes Figure 1 A schematic diagram of the front view structure of

[0033] Figure 3 yes Figure 2 Schematic diagram of the cross section in the AA direction;

[0034] Figure 4 yes Figure 3 A magnified schematic diagram of B;

[0035] Figure 5 yes Figure 3 A magnified schematic diagram of middle C;

[0036] Figure 6 is a three-dimensional structural schematic diagram of a fork frame of another embodiment;

[0037] Figure 7 yes Figure 6 A schematic side view of the middle mounting frame;

[0038] Figure 8 yes Figure 7 A schematic diagram of another embodiment of the present invention;

[0039] Fig. 9 yes Figure 8 A magnified schematic diagram of D in the middle;

[0040] Fig.10 It is a schematic diagram of the three-dimensional structure of the reel;

[0041] Fig.11 It is a schematic cross-sectional view of the reel.

[0042] Description of the accompanying drawings: 1, shelf stop; 2, transverse frame; 21, side plate; 31, first support rod; 311, first clamping groove; 312, first anti-slip groove; 313, first adjustment gap; 314, first clamping protrusion; 315, first cushion block; 32, second support rod; 321, second clamping groove; 322, second anti-slip groove; 323, second adjustment gap; 324, second clamping protrusion; 325, second cushion block; 33, support plate; 41, first driving mechanism; 411, first oil cylinder ; 412, first piston rod; 42, second driving mechanism; 421, second oil cylinder; 422, second piston rod; 43, fastener; 44, through groove; 5, mounting frame; 6, reinforcing plate; 7, adjusting mechanism; 8, connecting plate; 81, reel; 811, fixing plate; 812, reel; 813, torsion plate; 814, guide member; 815, guide groove; 816, torsion spring; 817, groove; 82, friction pad; 83, hook; 9, connecting groove; 91, inclined plane. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1 -Attached Fig.11 This application is described in further detail.

[0044] The embodiment of the present application discloses a fork frame, including a transverse frame 2, a shelf block 1, a mounting frame 5 and a driving mechanism for driving the transverse frame 2 to move, the fork is installed at the rear end of the transverse frame 2, and the forklift mast is located at the front side of the transverse frame 2, the forklift mast is connected to the driving mechanism through the mounting frame 5, the shelf block 1 is installed on the transverse frame 2, and the shelf block 1 is relatively located above the fork, and is used to block the cargo when the fork is loaded at a high height.

[0045] Among them, the transverse frame 2 includes a side plate 21 and a support rod. The side plate 21 is fixedly connected to the shelf 1, and the support rod is connected to the side plate 21 and is used to install a driving mechanism; the driving mechanism includes a cylinder and a piston rod. The cylinder is connected to the mounting frame 5 and the cylinder is embedded in the support rod, and the cylinder is slidably connected to the support rod, and the piston rod is fixedly connected to the side plate 21. The piston rod is driven by the cylinder to extend and retract, thereby pushing the transverse frame 2 and the fork and shelf 1 to move horizontally.

[0046] Through the embedded installation method, compared with the external installation method, the impact of the cylinder and the support rod on the driver's field of vision is reduced, and the blind spot of vision is reduced. In addition, the sliding connection between the cylinder and the support rod enables the cylinder to drive the piston rod to move and drive the side plate 21 and the support rod to move horizontally. The cylinder can slide relative to the support rod to avoid the drive mechanism and the transverse frame 2 structure from getting stuck.

[0047] This application provides the following specific embodiments:

[0048] Embodiment 1

[0049] As attached Figure 1 As shown, side panels 21 are fixedly provided at the left and right ends of the shelf 1, and two support rods distributed up and down are fixedly connected between the two side panels 21. The two support rods are both located below the shelf 1, and a driving mechanism is connected to the two support rods. A support plate 33 for supporting the support rods is fixedly provided between the two support rods.

[0050] A slot is provided in the support rod, and the slot is used to engage the oil cylinder in the driving mechanism. In this embodiment, the oil cylinder is a bidirectional oil cylinder, which can drive the piston rod to move back and forth left and right, and the left and right ends of the piston rod are respectively fixedly connected to the side plates 21 on both sides; since the mounting frame 5 is arranged on the front side of the transverse frame 2 and needs to be connected to the oil cylinder, the slot opening is arranged forward to facilitate the connection between the oil cylinder and the mounting frame 5, as shown in the attached figure. Figure 2 As shown, a reinforcing plate 6 may be connected between the oil cylinder and the mounting frame 5 to improve the connection strength between the oil cylinder and the mounting frame 5 .

[0051] An adjustment gap is reserved between the oil cylinder and the inner wall of the slot, so that during the process of loading and unloading goods, there is no upward and downward movement between the support rod and the oil cylinder, thereby preventing the oil cylinder and the support rod from colliding and being damaged.

[0052] In order to prevent the oil cylinder from falling off from the slot, an anti-falling groove is opened on the inner wall of the slot, and a clamping protrusion for clamping the anti-falling groove is fixedly arranged on the oil cylinder to prevent the oil cylinder from falling off from the support rod.

[0053] In addition, when the oil cylinder drives the piston rod and realizes the left and right transverse movement of the support rod and the side plate 21, since the oil cylinder is installed on the mounting frame 5, its position will not move with the support rod, so there will be relative sliding between the oil cylinder and the support rod, in order to avoid friction and wear between the oil cylinder surface and the inner wall of the support rod, a pad is arranged on the surface of the oil cylinder, the pad is used to contact the inner wall of the card slot and the anti-slip groove, and the pad is made of wear-resistant material.

[0054] As attached Figure 3-5As shown, for the convenience of explanation, the support rod, drive mechanism, oil cylinder, piston rod, slot, anti-slip groove, adjustment gap, protrusion and cushion block located at the top are called the first support rod 31, the first drive mechanism 41, the first oil cylinder 411, the first piston rod 412, the first slot 311, the first anti-slip groove 312, the first adjustment gap 313, the first protrusion 314 and the first cushion block 315; the support rod, drive mechanism, oil cylinder, piston rod, slot, anti-slip groove, adjustment gap, protrusion and cushion block located at the bottom are called the second support rod 32, the second drive mechanism 42, the second oil cylinder 421, the second piston rod 422, the second slot 321, the second anti-slip groove 322, the second adjustment gap 323, the second protrusion 324 and the second cushion block 325. Specifically, a first slot 311 opening forward is provided in the first support rod 31, and a first driving mechanism 41 is correspondingly arranged in the first slot 311. A first oil cylinder 411 in the first driving mechanism 41 is engaged in the first slot 311, and left and right ends of a first piston rod 412 are respectively fixed to the side plates 21 on both sides. A first adjustment gap 313 is reserved on the top wall and bottom wall of the first slot 311, and a first anti-slip groove 312 is provided on the top wall of the first slot 311. A first clamping protrusion 314 engaged with the first anti-slip groove 312 is fixed at the upper end of the first oil cylinder 411, so that the first support rod 31 is connected to the first oil cylinder 411 in a hanging shape. In this embodiment, a first cushion block 315 is arranged on the first clamping protrusion 314 outer surface and the rear end surface of the first oil cylinder 411; a second slot 321 with an opening facing forward is opened in the second support rod 32, and a second driving mechanism 42 is correspondingly arranged in the second slot 321, and the second oil cylinder 421 in the second driving mechanism 42 is clamped in the second slot 321, and the left and right ends of the second piston rod 422 are respectively fixed to the side plates 21 on both sides, and a second adjustment gap 323 is reserved on the top wall and the bottom wall of the second slot 321, and a second anti-slip groove 322 is opened on the bottom wall of the second slot 321, and a second clamping protrusion 324 clamped in the second anti-slip groove 322 is fixed at the lower end of the second oil cylinder 421. In this embodiment, a second cushion block 325 is arranged on the rear end surface of the second oil cylinder 421.

[0055] Embodiment 2

[0056] As attached Figure 6-7 As shown, the difference from the first embodiment is that: the first support rod 31 is slidably connected to the side plate 21 and the first cylinder 411 is slidably connected to the mounting frame 5, an adjusting mechanism 7 for driving the first support rod 31 to slide up and down is fixedly provided on the side plate 21, a through groove 44 is provided on the side plate 21, and both end heads of the first piston rod 412 are slidably matched in the through groove 44. At this time, the support plate 33 is no longer arranged on the support rod, and the reinforcing plate 6 is no longer arranged between the first cylinder 411 and the mounting frame 5.

[0057] The first support rod 31 is driven to slide up and down through the adjustment mechanism 7, thereby driving the first oil cylinder 411 to slide up and down, and making the piston rod slide up and down along the through groove 44, so as to adjust the position of the first support rod 31 and the first driving mechanism 41, and change the field of vision of the driving operator. After adjusting the position, the two end heads of the first piston rod 412 are fixedly connected to the two side plates 21 through fasteners 43, so as to fix the position of the first support rod 31 and the first driving mechanism 41, and the fasteners 43 can be bolts.

[0058] The second support rod 32 and the second driving mechanism 42 are arranged at the bottom edge of the side plate 21, which has little impact on the field of vision of the driving operator. The second support rod 32 and the side plate 21 remain fixed and do not need to be adjusted.

[0059] A connecting groove 9 is provided on the mounting frame 5, and a reel 81 is provided in the connecting groove 9 to slide up and down, and a friction pad 82 is provided on the outer circumference of the reel 81. A connecting plate 8 is fixedly provided on the first oil cylinder 411, and the reel 81 is fixedly connected to the connecting plate 8. When the first oil cylinder 411 slides up and down relative to the mounting frame 5, the reel 81 slides up and down along the connecting groove 9. Through the sliding cooperation between the connecting groove 9 and the reel 81, the first oil cylinder 411 is guided to slide, and the first oil cylinder 411 can be prevented from being separated from the mounting frame 5 during the sliding adjustment process.

[0060] The reel 81 includes two fixed plates 811 and a reel 812 rotatably connected between the two fixed plates 811. The friction pad 82 is arranged on the outer peripheral surface of the reel 812. One of the fixed plates 811 is fixedly connected to the connecting plate 8. The friction pad 82 is arranged on the reel 812 of the reel 81. The friction pad 82 is used to contact the wall of the connecting groove 9 to provide friction force for buffering when the reel 81 slides along the connecting groove 9, thereby preventing the support rod, cylinder and piston rod from sliding too fast.

[0061] Embodiment 3

[0062] As attached Figure 8-9As shown, the difference from the second embodiment is that the two side walls of the connecting groove 9 in the vertical direction (i.e., along the sliding direction of the reel 81) are inclined inward from top to bottom, a hook 83 is fixedly provided on the top wall of the connecting groove 9, the friction pad 82 is wound on the reel 812, and one end of the friction pad 82 is fixedly connected to the reel 812, and the other end is connected to the hook 83. The two side walls of the connecting groove 9 are inclined inward, that is, the two side surfaces of the connecting groove 9 in the vertical direction are inclined surfaces 91, so that when the adjustment mechanism 7 fails, the reel 81 can be prevented from sliding freely and quickly to prevent accidents, thereby improving safety; in addition, during normal use, the spacing between the two side walls of the connecting groove 9 becomes smaller. In order to enable the reel 81 to slide along the connecting groove 9 during normal use, the friction pad 82 is wound on the reel 812, one end of which is fixed to the reel 812, and the other end is hung on the hook 83. The hook 83 is fixed on the wall of the connecting groove 9 on the opposite side of the sliding direction of the reel 81, so that when the reel 81 slides, the friction pad 82 can be unfolded to reduce the diameter of the reel 81; and the friction pad 82 is connected to the hook 83 to play a certain suspending role.

[0063] As attached Fig.10 As shown, a guide member 814 is fixed between the upper end surfaces of the two fixed plates 811 (i.e., the end surfaces facing the hook 83), and a guide groove 815 is opened in the guide member 814, which is opposite to the hook 83 and used for passing the friction pad 82. The friction pad 82 passes through the guide groove 815 and is connected to the hook 83, so that the force of the friction pad 82 to hang the reel 81 is vertically upward.

[0064] As attached Fig.11 As shown, a groove 817 is provided in the fixed plate 811, and a torsion plate 813 is rotatably connected in the groove 817. The reel 812 is fixedly connected to the torsion plate 813. A rotation damper is connected between the torsion plate 813 and the fixed plate 811. The rotation damper is arranged to connect the torsion plate 813 and the fixed plate 811. When the friction pad 82 is unfolded, the torsion plate 813 is driven to rotate by the rotation of the reel 812, so that the rotation damper is twisted and has elastic force. When the adjustment mechanism 7 drives the support rod, the cylinder and the piston rod to move in the opposite direction and reset, the torsion plate 813 and the reel 812 are driven to rotate in the opposite direction under the action of the rotation damping elastic force, so that the friction pad 82 is rewound onto the reel 812.

[0065] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fork frame, comprising a transverse frame (2) on which a fork is mounted, a backstop (1) mounted on the transverse frame (2), a driving mechanism for driving the transverse frame (2) to move, and a mounting frame (5) connected between a forklift mast and the driving mechanism, characterized in that: The transverse frame (2) comprises: a side plate (21), the side plate (21) being fixedly connected to the shelf (1); a support rod, the support rod being connected to the side plate (21) and being used to mount the drive mechanism; the drive mechanism comprises: a piston rod, the piston rod being fixedly connected to the side plate (21); an oil cylinder, the oil cylinder being connected to the mounting frame (5), and the oil cylinder being embedded in the support rod and being slidably connected to the support rod; The support rod is slidably connected to the side plate (21) and the oil cylinder is slidably connected to the mounting frame (5); an adjustment mechanism (7) for driving the support rod to slide is fixedly provided on the side plate (21); a through slot (44) is provided on the side plate (21); the piston rod slidably fits the through slot (44) and is fixedly connected to the side plate (21) via a fastener (43).

2. A fork frame according to claim 1, characterized in that: A slot for clamping the oil cylinder is provided in the support rod, and an adjustment gap is reserved between the oil cylinder and the inner wall of the slot.

3. A fork frame according to claim 2, characterized in that: An anti-slip groove is provided on the inner wall of the clamping groove, and a clamping protrusion for clamping the anti-slip groove is fixedly provided on the oil cylinder.

4. A fork frame according to claim 3, characterized in that: A cushion block is provided on the outer surface of the oil cylinder, and the cushion block contacts the inner wall of the clamping groove and / or the anti-slip groove.

5. A fork frame according to claim 1, characterized in that: The mounting frame (5) is provided with a connecting groove (9), a reel (81) is slidably provided in the connecting groove (9), a connecting plate (8) is fixedly provided on the oil cylinder, and the reel (81) is fixedly connected to the connecting plate (8).

6. A fork frame according to claim 5, characterized in that: The reel (81) comprises two fixed plates (811) and a reel (812) rotatably connected between the two fixed plates (811), a friction pad (82) being provided on the outer circumference of the reel (812), and one of the fixed plates (811) being fixedly connected to the connecting plate (8).

7. A fork frame according to claim 6, characterized in that: The side wall of the connecting groove (9) along the sliding direction of the reel (81) is arranged to be inclined inwards, and a hook (83) is fixedly provided on the inner wall of the connecting groove (9) and is located on the side opposite to the sliding direction of the reel (81). The friction pad (82) is wound on the reel (812), one end of the friction pad (82) is fixedly connected to the reel (812), and the other end of the friction pad (82) is connected to the hook (83).

8. A fork frame according to claim 7, characterized in that: A guide member (814) is fixedly provided between the end surfaces of the two fixing plates (811) facing the hook (83), and a guide groove (815) facing the hook (83) and used for passing the friction pad (82) is provided in the guide member (814).

9. A fork frame according to claim 8, characterized in that: A groove (817) is provided in the fixed plate (811), a torsion plate (813) is rotatably connected in the groove (817), the reel (812) is fixedly connected to the torsion plate (813), and a rotation damper is connected between the torsion plate (813) and the fixed plate (811).

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