Self-lifting fork truck inner and outer mast gap adjusting mechanism

Abstract

The utility model provides a kind of self-lifting fork truck inner and outer portal gap adjusting mechanism, including composite roller assembly and small roller assembly, the composite roller assembly and small roller assembly are with screw joint structure, when inner portal is lifted to the gap between the web of its web and the web of outer portal is minimum, respectively adjusting respective screw joint structure, so that a part of composite roller assembly is tangent and rolls with the web of outer portal, a part of small roller assembly is tangent and rolls with the web of inner portal.The utility model can accurately adjust the gap between inner and outer portal by the cooperation of composite roller assembly and small roller assembly, ensure the stability and safety of fork truck in lifting process, reduce the friction and wear in fork truck lifting process, and the adjusting component only uses adjusting screw, bolt and the like, simple structure, easy to operate, reduce adjustment difficulty.

Description

Technical Field

[0001] This utility model relates to the field of logistics and transportation equipment technology, specifically to a mechanism for adjusting the gap between the inner and outer masts of a self-lifting forklift. Background Technology

[0002] The gap between the inner and outer masts of a forklift can cause swaying during lifting and lowering. Traditional methods for adjusting the gap between the inner and outer masts of self-lifting forklifts typically rely on manual manipulation of the masts or adjusting the distance by drilling holes at multiple points on the masts. These methods suffer from low precision, complex operation, and time-consuming processes. As the inner and outer masts wear down during use, the gap gradually widens, leading to decreased stability and safety during lifting and lowering. Therefore, a mechanism is needed that can precisely and quickly adjust the gap between the inner and outer masts to improve forklift performance and safety. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the purpose of this invention is to provide a mechanism for adjusting the gap between the inner and outer masts of a self-lifting forklift. This mechanism can accurately and quickly adjust the gap between the inner and outer masts, ensuring the stability and safety of the forklift during lifting and lowering, while reducing the difficulty of adjustment.

[0004] This utility model is achieved through the following technical solution: A mechanism for adjusting the gap between the inner and outer masts of a self-lifting forklift includes a composite roller assembly and a small roller assembly. The composite roller assemblies are arranged in pairs and symmetrically installed on both sides of the bottom end of the inner mast. The large roller in the composite roller assembly is tangent to the inner wall of the channel steel wing plate of the outer mast. The small roller assemblies are arranged in pairs and symmetrically installed on both sides of the top end of the outer mast. Both the composite roller assembly and the small roller assembly have a screw connection structure. When the gap between the web of the inner mast and the web of the outer mast is minimal at the point where the composite roller assembly is raised, the screw connection structure of the composite roller assembly is adjusted so that a portion of the composite roller assembly is tangent to the web of the outer mast and rolls. When the inner mast is moved again until the gap between the web of the small roller assembly and the web of the outer mast is minimal, the screw connection structure of the small roller assembly is adjusted so that a portion of the small roller assembly is tangent to the web of the inner mast and rolls.

[0005] Preferably, the number of composite roller assemblies is set to 4, which are installed in two pairs at the bottom of the inner gantry, with each pair of composite roller assemblies symmetrically installed on both sides of the bottom of the inner gantry.

[0006] Preferably, the composite roller assembly further includes a shaft head, side rollers, side roller brackets, dustproof plates, shaft retaining rings, stop plates, and adjusting screws. The large roller is sleeved and installed on the shaft head. The shaft head has an inner hole extending through its axis. One end of the inner hole is fitted with the side roller bracket, and the other end is screwed with an adjusting screw. The adjusting screw can abut against the plate surface of the side roller bracket. The side roller is installed on the side roller bracket. The side roller is perpendicular to the large roller. The dustproof plate, shaft retaining ring, and stop plate are installed in sequence. When the gap between the web of the inner mast and the web of the outer mast is minimal at the composite roller assembly above it, the adjusting screw is turned to push the wheel surface of the side roller to a tangent position with the web of the outer mast.

[0007] Preferably, the small roller assembly includes a roller bracket, axle, self-lubricating bearing, roller bushing, axle retaining ring, mounting bolt, adjusting bolt, and tightening nut. The axle is mounted on the roller bracket and limited by a pin in conjunction with the axle retaining ring. The roller bushing is mounted on the axle through the self-lubricating bearing. The mounting bolt passes sequentially through holes in the channel steel of the outer gantry and holes in the roller bracket. The adjusting bolt, after being fitted with a tightening nut, passes through a corresponding hole in the channel steel of the outer gantry and is positioned adjacent to the plate surface of the roller bracket. When the gap between the web of the inner gantry and the web of the outer gantry is minimal at the point where the small roller assembly is raised and lowered, the mounting bolt, adjusting bolt, and tightening nut are tightened respectively to push the wheel surface of the roller bushing to a tangent position with the web of the inner gantry.

[0008] Compared with the prior art, the beneficial effects of this utility model are: This invention, through the combined use of a composite roller assembly and a small roller assembly, enables precise adjustment of the gap between the inner and outer masts, ensuring the stability and safety of the forklift during lifting and lowering, and reducing friction and wear during lifting, thus extending the service life of the equipment. The adjustment components use only adjusting screws and bolts, resulting in a simple structure, convenient operation, and reduced adjustment difficulty. The design of the composite roller assembly and the small roller assembly can adapt to different gap adjustment requirements, improving the forklift's applicability and flexibility. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of the self-lifting forklift inner and outer mast clearance adjustment mechanism of this utility model; Figure 2This is an exploded view of the composite roller assembly of this utility model; Figure 3 This is a schematic diagram of the assembly structure of the composite roller assembly of this utility model; Figure 4 This is an exploded view of the small roller assembly of this utility model; Figure 5 This is a schematic diagram of the assembly structure of the small roller assembly of this utility model.

[0011] Among them, the composite roller assembly 1, large roller 101, shaft head 102, side roller 103, side roller bracket 104, plate surface 1041, dustproof plate 105, shaft retaining ring 106, stop plate 107, adjusting screw 108, small roller assembly 2, roller bracket 201, wheel axle 202, self-lubricating bearing 203, roller bushing 204, shaft retaining ring 205, mounting bolt 206, adjusting bolt 207, tightening nut 208, inner mast 3, and outer mast 4. Detailed Implementation

[0012] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0013] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0014] Figure 1 A mechanism for adjusting the gap between the inner and outer masts of a self-lifting forklift is shown, comprising a compound roller assembly 1 and a small roller assembly 2. The purpose is to precisely adjust the gap between the inner and outer masts by using the compound roller assembly and the small roller assembly in combination, thereby ensuring the stability and safety of the forklift during lifting.

[0015] To complete the installation of the composite roller assembly 1, the composite roller assembly 1 is set in pairs and symmetrically installed on both sides of the bottom end of the inner gantry 3. The large roller 101 in the composite roller assembly 1 is tangent to the inner wall of the channel steel wing plate of the outer gantry 4, so that the inner gantry 3 can slide in the channel steel wing plate of the outer gantry 4. The design of the large roller 101 can adapt to the adjustment requirements of different gaps, ensuring a tight fit between the inner gantry 3 and the outer gantry 4.

[0016] Install the small roller assembly 2. The small roller assemblies 2 are arranged in pairs and symmetrically installed on both sides of the top of the outer gantry 4. Both the composite roller assembly 1 and the small roller assembly 2 have screw connections. When the gap between the web of the inner gantry 3 at the location of the composite roller assembly 1 and the web of the outer gantry 4 is minimal, adjust the screw connection of the composite roller assembly 1 so that a portion of the composite roller assembly 1 is tangent to the web of the outer gantry 4 and rolls. Then, move the inner gantry 3 again until the gap between the web of the inner gantry 3 at the location of the small roller assembly 2 and the web of the outer gantry 4 is minimal, adjust the screw connection of the small roller assembly 2 so that a portion of the small roller assembly 2 is tangent to the web of the inner gantry 3 and rolls. The adjustment components only use adjusting screws, bolts, or similar screw connections. Due to their simple structure and convenient operation, the adjustment difficulty is significantly reduced.

[0017] like Figure 1 The number of composite roller assemblies 1 is set to 4, and they are installed in two pairs at the bottom of the inner gantry 3. This can enhance the stability of the gantry sliding up and down. Each pair of composite roller assemblies 1 is symmetrically installed on both sides of the bottom of the inner gantry 3.

[0018] As one embodiment of this utility model, such as Figure 2 and Figure 3 The composite roller assembly 1 is designed to include a large roller 101, a shaft head 102, a side roller 103, a side roller bracket 104, a dustproof plate 105, a shaft retaining ring 106, a stop plate 107, and an adjusting screw 108. The large roller 101 is sleeved and installed on the shaft head 102. The shaft head 102 has an inner hole extending along its axis. One end of the inner hole is fitted with the side roller bracket 104, and the other end is screwed with the adjusting screw 108. The adjusting screw 108 can abut against... The side roller bracket 104 has a plate surface 1041, and the side roller 103 is installed on the side roller bracket 104. The side roller 103 is set perpendicular to the large roller 101. The dustproof plate 105, the shaft retaining ring 106, and the stop plate 107 are installed in sequence. When the gap between the web of the inner mast 3 and the web of the outer mast 4 is the smallest at the composite roller assembly 1 above it, the adjusting screw 108 is turned to push the wheel surface of the side roller 103 to the web of the outer mast 4 to the tangent position.

[0019] As one embodiment of this utility model, such as Figure 4 and Figure 5The small roller assembly 2 includes a roller bracket 201, axle 202, self-lubricating bearing 203, roller bushing 204, shaft retaining ring 205, mounting bolt 206, adjusting bolt 207, and tightening nut 208. The axle 202 is mounted on the roller bracket 201 and is limited by a pin in conjunction with the shaft retaining ring 205. The roller bushing 204 is mounted on the axle 202 through the self-lubricating bearing 203. The mounting bolt 206 passes sequentially through holes opened in the channel steel of the outer frame 4 and the roller bushing. The hole on the wheel bracket 201, the adjusting bolt 207 after the tightening nut 208 is provided, passes through the corresponding hole on the channel steel of the outer gantry 4, and is set adjacent to the plate surface 2011 of the roller bracket 201. When the gap between the web plate of the inner gantry 3 and the web plate of the outer gantry 4 is the smallest when it is raised to the small roller assembly 2, tighten the mounting bolt 206, adjusting bolt 207 and tightening nut 208 respectively, and push the wheel surface of the roller bushing 204 to the web plate of the inner gantry 3 to the tangent position.

[0020] The working principle of this utility model: Gap Positioning and Adjustment: By raising and lowering the inner gantry 3, find the position where the gap between the inner and outer gantry is smallest at the composite roller assembly 1. Then, by adjusting the adjusting screw 108 in the composite roller assembly 1, push the side roller 103 to be tangent to the web plate of the outer gantry 4. Next, by raising and lowering the inner gantry 3, find the position where the gap between the inner and outer gantry is smallest at the small roller assembly 2, and use the roller bushings 204 in the small roller assembly 2 to tangentially press against the two side web plates of the inner gantry 3. Finally, tighten the mounting bolts 206, adjusting bolts 207, and tightening nuts 208 respectively to complete the adjustment, thereby precisely adjusting the gap between the inner and outer gantry.

[0021] After installation, the inner gantry needs to be raised and lowered for testing and adjustment to ensure that it slides normally within the outer gantry channel steel without any jamming or other problems. If jamming or other problems are found, the adjusting screws of the composite rollers and the adjusting bolts of the small roller assembly should be adjusted flexibly until the problem is resolved.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mechanism for adjusting the gap between the inner and outer masts of a self-lifting forklift, characterized in that: The system includes a composite roller assembly (1) and a small roller assembly (2). The composite roller assemblies (1) are arranged in pairs and symmetrically installed on both sides of the bottom end of the inner gantry (3). The large roller (101) in the composite roller assembly (1) is tangent to the inner wall of the channel steel wing plate of the outer gantry (4). The small roller assemblies (2) are arranged in pairs and symmetrically installed on both sides of the top end of the outer gantry (4). Both the composite roller assembly (1) and the small roller assembly (2) have a screw connection structure. When the inner gantry (3) is raised or lowered to the composite roller assembly... When the gap between the web of the inner gantry (1) and the web of the outer gantry (4) is the smallest, adjust the screw connection of the composite roller assembly (1) so that a part of the composite roller assembly (1) is tangent to the web of the outer gantry (4) and rolls. Move the inner gantry (3) again until the gap between the web of the inner gantry (3) and the web of the outer gantry (4) is the smallest. Adjust the screw connection of the inner gantry (3) so that a part of the inner gantry (3) is tangent to the web of the inner gantry (3) and rolls.

2. The self-lifting forklift inner and outer mast clearance adjustment mechanism according to claim 1, characterized in that: The number of composite roller assemblies (1) is set to 4, and they are installed in two pairs at the bottom of the inner gantry (3). Each pair of composite roller assemblies (1) is symmetrically installed on both sides of the bottom of the inner gantry (3).

3. The self-lifting forklift inner and outer mast clearance adjustment mechanism according to claim 1 or 2, characterized in that: The composite roller assembly (1) further includes a shaft head (102), a side roller (103), a side roller bracket (104), a dustproof plate (105), a shaft retaining ring (106), a stop plate (107), and an adjusting screw (108). The large roller (101) is sleeved and installed on the shaft head (102). The shaft head (102) has an inner hole extending along its axis. One end of the inner hole is fitted with the side roller bracket (104), and the other end is screwed with the adjusting screw (108). The adjusting screw (108) can abut against the side roller bracket (103). The side roller (103) is mounted on the side roller bracket (104) of the plate surface (1041). The side roller (103) is perpendicular to the large roller (101). The dustproof plate (105), the shaft retaining ring (106), and the stop plate (107) are installed in sequence. When the gap between the web of the inner mast (3) and the web of the outer mast (4) is the smallest when it is raised to the composite roller assembly (1) above it, the adjusting screw (108) is turned to push the wheel surface of the side roller (103) to the web of the outer mast (4) to the tangent position.

4. The self-lifting forklift inner and outer mast clearance adjustment mechanism according to claim 1, characterized in that: The small roller assembly (2) includes a roller bracket (201), axle (202), self-lubricating bearing (203), roller bushing (204), shaft retaining ring (205), mounting bolt (206), adjusting bolt (207), and tightening nut (208). The axle (202) is mounted on the roller bracket (201) and is limited by a pin in conjunction with the shaft retaining ring (205). The roller bushing (204) is mounted on the axle (202) through the self-lubricating bearing (203). The mounting bolt (206) passes sequentially through the channel steel of the outer frame (4). The holes opened, the holes on the roller bracket (201), the adjusting bolt (207) after the tightening nut (208) is provided, pass through the corresponding holes on the channel steel of the outer gantry (4), and are set adjacent to the plate surface (2011) of the roller bracket (201). When the gap between the web of the inner gantry (3) and the web of the outer gantry (4) is the smallest when it is raised to the small roller assembly (2) on its upper part, tighten the mounting bolt (206), adjusting bolt (207) and tightening nut (208) respectively, and push the wheel surface of the roller bushing (204) to the web of the inner gantry (3) to the tangent position.

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