Auxiliary lifting frame for vehicle-wheels

Abstract

Disclosed in the present invention is a lifting-auxiliary system with a multi-function carrier, the lifting-auxiliary system being configured to lift wheels or weights from the ground, for example, to mount the wheels to a vehicle to be serviced that is lifted to a certain height, or lower the wheels or the weights to the ground from a high place, for example, dismount the wheels from said vehicle lifted to the certain height. The lifting-auxiliary system comprises a vehicle-wheel base frame, two columns, a lifter structure, a transmission structure and a tire retainer, wherein the vehicle-wheel base frame is configured to support the entire structure, and movement and transportation are facilitated by means of the vehicle-wheel base frame; the two columns are respectively fixed to the vehicle-wheel base frame, and are configured to support components, such as the lifter structure and the transmission structure; the lifter structure is sleeved on the columns and is driven by the transmission structure to move vertically along the columns; the lifter structure is also configured to load a vehicle wheel or a tire; and the tire retainer is configured to press the vehicle wheel or the tire loaded on the lifter structure during movement of the vehicle-wheel base frame.

Description

Wheel assisted lift TECHNICAL FIELD

[0001] The present invention relates to the field of mechanics, and more particularly, to a wheel assisted lift. BACKGROUND

[0002] During servicing of cars and trucks, it is often necessary to remove and install wheels on a regular basis. A wheel with a tire is quite heavy, typically weighing 30-40 pounds. Furthermore, the wheel is circular in shape and difficult to lift and carry by a single person. During servicing and repair, it is often necessary to lift the wheel with the tire off the ground and advance it a few inches or a foot to precisely align the lug bolts on the wheel hub. For a mechanic, this operation is a physical burden that must be performed many times a day, and often results in back strain, finger pinching, and other injuries. SUMMARY

[0003] The present invention provides a wheel or heavy object assisted lift, and has the technical effects of providing a tool to assist in lifting, carrying, and moving a wheel or heavy object, thereby solving the problem of inconvenience in carrying and removing a wheel or heavy object.

[0004] To achieve the above technical effects, the present invention adopts the following technical means:

[0005] The wheel auxiliary lifting frame comprises a wheel base, a transverse frame with a rotating wheel arranged at the bottom, two columns, a plurality of safety limiting grooves distributed on the left column, a safety buckle for limiting and avoiding falling after lifting, a roller guide lifting frame structure, a support body comprising a transverse main rod and two vertical sleeves connected to the transverse main rod, an adjustable roller mechanism, a sliding tube, a limiting space for supporting the tire formed between the two horizontal roller assemblies and the sliding tube, an adjusting hole on the transverse main rod for adjusting the position of the two horizontal roller assemblies to adapt to different diameters of the tire, a front and rear adjustable position or rotation of the sliding tube relative to the horizontal roller assembly to enable the tire to move forward and backward and rotate freely, a guide belt wheel arranged on the transverse main rod, a transmission structure comprising a brake box and a hardware screw box and a transmission belt, the brake box and the hardware screw box being fixed to the top of the two columns, the head end of the transmission belt being fixed on the belt pulley in the brake box through a pin shaft, passing through the guide belt wheel on the transverse main rod of the lifter, and the tail end of the transmission belt being locked in the transmission belt fixing clamp in the brake box, the lifter structure being driven by the transmission structure to move up and down along the column under the drive of a lithium tool or a hand crank, a tire buckle having one end sleeved on one column and the other end being a fixed hook, the fixed hook pressing the tire tread, the fixed hook holding the tire tread after buckling to cooperate with the lifter to ensure that the tire buckle effectively holds the tire, and ensuring that the tire does not fall off when moving the whole lifting auxiliary system.

[0006] Preferably, the adjustable roller mechanism comprises a roller shaft, a roller, a bearing and a sliding tube, the roller shaft being connected to the transverse main rod; the roller is sleeved on the roller shaft through the bearing; the sliding tube is sleeved on the roller, and the sliding tube is shorter than the roller, and the sliding tube is movable on the roller; the two ends of the roller are provided with clamping grooves, and a plurality of protruding fixing springs are embedded in the clamping grooves to block the sliding tube, so that the sliding tube moves in the two ends of the roller.

[0007] Preferably, the vertical sleeve is provided with an anti-collision rubber strip on the side in contact with the tire.

[0008] Preferably, the wheel clamping sleeve arranged at one end of the column is composed of two fixed edges connected at the bottom, wherein each fixed edge comprises a vertical fixed edge and an inclined fixed edge with an angle greater than 90° with the vertical fixed edge; the two vertical fixed edges are respectively connected to the two side surfaces of the top end of the fixed hook, and the top ends of the two inclined fixed edges are connected by bolts; the distance from the bolt to the vertical fixed edge is greater than the width of the column; when the tire clamping sleeve is not in use, the fixed hook is stored between the vertical sleeve and the column; when the tire clamping sleeve is used to press against the tire, the fixed hook is pulled out along the column, and is turned over along the angle of the inclined fixed edge, so that the two inclined fixed edges and the bolt tightly hold the column, and the top end surface of the fixed hook abuts against the column.

[0009] Preferably, the safety limiting grooves are evenly arranged on one side surface of the column with a spacing of 110 mm; the vertical sleeve is provided with a positioning hole, and the safety lock is inserted into the positioning hole and the limiting grooves to lock the column and the vertical sleeve.

[0010] Preferably, the transmission structure further comprises a support frame fixed at the top end of the column, wherein the support frame comprises a top plate and a front cover plate; the front cover plate is arranged on the top plate; the front cover plate is arranged on the support frame; the brake box and the hardware screw box are arranged on the support frame and the front cover plate; the belt pulley is arranged in the brake box, and one end surface of the belt pulley is a brake disc; the belt guide is fixed on the support frame; the brake pad is fixed in the brake disc; the brake support is fixed on the front cover plate, and one end of the brake support protrudes and presses the brake pad; the other end of the brake support is provided with a compression spring fixing seat; the compression spring is clamped on the compression spring fixing seat; the brake bolt is fixed above the front cover plate; the threaded shank of the brake bolt is provided with a pressure adjusting nut, the threaded shank passes through the compression spring, and the pressure of the compression spring is adjusted by the pressure adjusting nut to adjust the pressure of the brake support pressing the brake pad; the speed reduction motor is connected to the belt pulley to control the belt pulley to wind and unwind the transmission belt.

[0011] Preferably, the transmission structure further comprises a manual wrench connected to the speed reduction motor to drive the belt pulley to rotate manually.

[0012] Preferably, the rear end of the speed reduction motor is provided with a drill mounting bracket, the drill mounting bracket is connected to the speed reduction motor by screws, the two side connecting plates are connected for reinforcement, and the drill mounting bracket is provided with a plurality of adjustment mounting holes.

[0013] Preferably, the support frame comprises a top plate and a front cover plate, the front cover plate is fixed on the top plate, and the top plate is fixed at the top end of the column; the front cover plate is provided with an anti-collision structure.

[0014] Preferably, the anti-collision structure is a plastic cover connected to the front cover plate.

[0015] Preferably, the wheel chassis is in a U-shaped structure, and the wheel chassis is fixed to the front or back of the stand column through detachable fixing members to effectively adapt to the use of the vehicle accessory repair scene, and the wheel chassis is reversely installed to connect a counterweight disc to maintain the necessary balance of the auxiliary lifting frame during use.

[0016] By adopting the technical scheme, the wheel or heavy object can be easily lifted and carried, the labor loss is avoided, and the problems of inconvenient wheel carrying and dismounting are solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a structural schematic diagram of an embodiment of the present application;

[0018] Fig. 2 is a schematic diagram of another perspective view of the embodiment of Fig. 1;

[0019] Fig. 3 is an exploded view of the embodiment of the present application;

[0020] Fig. 4 is an exploded diagram of a wheel chassis of the present application;

[0021] Fig. 5 is an exploded diagram of a transmission structure of the present application;

[0022] Fig. 6 is an exploded diagram of a lifter structure of the present application;

[0023] Fig. 7 is a structural schematic diagram of a tire buckle of the present application;

[0024] Fig. 8 is a structural schematic diagram of another embodiment of the present application. DETAILED DESCRIPTION

[0025] The technical scheme of the present application will be further specifically described below by means of embodiments and in combination with the drawings.

[0026] Referring to Figs. 1, 2 and 3, the wheel auxiliary lifting frame of the present embodiment comprises a wheel chassis 1, two stand columns 2, a lifter structure 3, a transmission structure 4 and a tire buckle 5.

[0027] The wheel chassis 1 is used to support the entire structure and facilitate movement and transfer. The two stand columns 2 are respectively fixed to the wheel chassis 1 and are used to support the lifter structure 3 and the transmission structure 4 and other components. The lifter structure 3 is sleeved on the stand column 2 and moves up and down along the stand column under the driving of the transmission structure 4. The lifter structure 3 is also used to load wheels or tires. The tire buckle 5 is used to press the wheels or tires loaded on the lifter structure 3 during the movement of the wheel chassis 1.

[0028] Referring to FIG. 4, the wheel chassis 1 comprises a chassis body 11 and a plurality of universal wheels 12. The chassis body 11 is in a U-shaped structure, and two groups of connecting ends 111 in a spreader shape are arranged at both ends of the chassis body 11 to fix a universal wheel 12. The arrangement of the two groups of connecting ends 111 in a spreader shape is beneficial to the stability of the whole wheel chassis 1. The universal wheels 12 facilitate smooth transfer, and two of the universal wheels are provided with a brake function. Bolt holes are arranged on the chassis body 11 to connect two upright columns. The wheel chassis 1 can be connected to the front or back of the upright column by bolts, effectively adapting to the use of the vehicle maintenance scene and realizing the avoidance requirement of use. At the same time, as shown in FIG. 8, the wheel chassis 1 can be installed reversely according to the lifting requirement, and a counterweight disc 9 is arranged on the chassis body 11 to maintain the necessary balance when the auxiliary lifting frame is used. The edge of the counterweight disc 9 is directly placed on the edge of the chassis body 11.

[0029] Referring to FIG. 1, the lower ends of the two upright columns 2 are locked on the chassis body 11 of the wheel chassis 1 by fixing bolts. The outer side of each upright column 2 is uniformly provided with a plurality of safety limiting grooves 21. The safety limiting grooves 21 are used in combination with safety buckles to limit the descent after lifting and avoid falling off, thereby increasing the safety in use.

[0030] Referring to FIG. 6, it is an exploded diagram of the lifter structure. As shown in the figure, the lifter structure 3 comprises a support body 31, an adjustable roller mechanism 32, a guide belt wheel 33 and the like.

[0031] As shown in the figure, the support body 31 comprises a horizontal main rod 311 and two vertical sleeves 312. The two vertical sleeves 312 are respectively sleeved on the two upright columns 2. The vertical sleeves 312 and the upright columns 2 are kept with a margin, so that the vertical sleeves 312 can move up and down along the upright columns 2. Positioning holes are arranged on the vertical sleeves 312. When the tire is lifted to the required height, in order to prevent the tire from moving downward due to gravity, the safety limiting grooves 21 are inserted through the positioning holes by safety buckles, which can effectively prevent the tire from moving downward and embody a higher safety mechanism.

[0032] The adjustable roller mechanism 32 is arranged on the front surface of the horizontal main rod 311 in the horizontal direction. The adjustable roller mechanism 32 comprises two horizontal roller assemblies 321 and a sliding tube 322 to form a support for supporting the wheel or tire.

[0033] The horizontal roller assembly 321 in the embodiment comprises a roller shaft 3211, a roller 3212, a bearing 3213 and a fixed elastic sheet 3214. The roller shaft 3211 is connected to the horizontal main rod 311, and different distance adjustment holes can be arranged on the horizontal main rod 311 to adapt to tires of different diameters. The roller 3212 is connected to the roller shaft 3211 through the bearing 3214, and under the driving of the bearing 3214, the roller 3212 rotates to drive the wheel / tire on the roller 3212 to rotate.

[0034] The sliding tube 322 is sleeved on the roller 3212, the sliding tube 322 is shorter than the roller 3212, and the inner diameter of the sliding tube 322 is greater than the outer diameter of the roller 3212. The two ends of the roller 3212 are provided with clamping grooves 32121, and a plurality of protruding fixed elastic sheets 3214 are embedded in the clamping grooves 32121 to block the sliding tube 322, so that the sliding tube 322 is limited to move in the two ends of the roller 3212, and the sliding tube 322 can be adjusted in position or rotated relative to the horizontal roller assembly 321, so that the tire can move forward and backward and also drive the tire to rotate freely on it.

[0035] In this way, the forward and backward movement of the wheel or tire can be facilitated, and the tire repair operation process can be conveniently matched. The guide pulley 33 is fixed to the rear surface of the transverse main rod 311 and located in the middle of the transverse main rod 311. The guide pulley 33 is used to assist the transmission structure 4 to realize the lifting of the entire transverse main rod 311.

[0036] Please see Fig. 5, which is an exploded view of the transmission structure of the present application. The transmission structure 4 includes a support frame 41, a transmission belt guide 42, a pulley 43, a speed reduction motor 44, a transmission belt 45, a brake box 46, a hardware screw box 47 and other components.

[0037] The support frame 41 is shown in Fig. 5, which includes a top plate 411 and a front cover plate 412. The top plate 411 and the front cover plate 412 are locked by fixing members and maintain a containing space therebetween. The top plate 411 is provided with a belt passing hole 4111 for the transmission belt 45 to pass through, and the transmission belt guide 42 is installed at the belt passing hole 4111. The pulley 43 is installed in the containing space. The brake box 46 and the hardware screw box 47 are fixed on the top plate 411 and the front cover plate 412. The leading end of the transmission belt 45 is fixed on the pulley 43 in the brake box 46 by a pin shaft, and the other end passes through the belt passing hole 4111 and then passes through the guide pulley 33 on the lifter transverse main rod, and then the trailing end of the transmission belt 45 is locked in the transmission belt guide 42 in the brake box 46. As shown, the pulley 43 can be controlled by electric control or manual control. Manual control is achieved by connecting the pulley with a manual wrench 6 to drive the pulley to rotate manually. Electric control can be achieved by an electric drill. In order to reduce the speed of the lifting frame rising and falling too fast, a speed reduction motor 44 is connected to the end of the pulley 43 to keep the rising or falling speed constant.

[0038] The brake mechanism includes a brake disc 431, a brake support 481, a brake pad 482, a compression spring 483, a brake bolt 484 and a pressure adjusting nut 485. The end face edge of the belt pulley 43 is protruded to form the brake disc 431. The brake pad 482 is fixed on the brake disc 431. The belt pulley 43 is connected with the speed reducer motor 44 through a bearing 432, which plays a guiding role when the brake disc is installed, prevents the brake disc from being installed out of position, and also makes the rotation of the brake disc more flexible. The middle part of the brake support 481 is fixed on the support frame 41, one end of the brake support 481 is bent and extends to press the brake pad 482, and the upper edge of the other end of the brake support 481 is provided with a compression spring fixing seat. The bottom of the compression spring 483 is clamped on the compression spring fixing seat. The top of the brake bolt 484 is fixed on the front cover plate 412, the threaded shank of the brake bolt 484 is provided with the pressure adjusting nut 485, and the threaded shank passes through the compression spring 483 from above the compression spring. The position of the pressure adjusting nut 485 can extrude the compression spring 483, and then generate pressure adjustment to the brake support 481, and under the influence of the brake support 481, one end of the corresponding brake pad of the brake support will move towards or away from the brake pad, so as to realize the adjustment of the pressure of the brake support pressing the brake pad. The brake mechanism provides continuous pressure to the brake pad through the compression spring and the brake support, so that when the brake disc rotates, there is a certain resistance, which can prevent the lifting frame from directly falling down when bearing the load, and can offset the weight influence brought by the increase of the load. The brake structure can be adjusted in tension. A handle 8 is arranged at the support frame 41.

[0039] In order to fix the electric drill driving the speed reducer motor 44, an adjustable drill clamp is arranged at the rear of the speed reducer motor 44 to cooperate with electric drills of different models and sizes. The adjustable drill clamp includes upper and lower electric drill mounting supports 491 and two side connecting plates 492, as shown in FIG. 1 and FIG. 5, the electric drill mounting supports 491 are connected through the two side connecting plates 492, a plurality of adjustment mounting holes 493 are arranged on the electric drill mounting supports 491 to adapt to electric drills of different models. A wrench guard 494 is arranged on the inner side surface of the electric drill mounting supports 491 according to the requirements of the electric drill model, and a bump-proof sealing strip 495 is sleeved on the wrench guard 494 to protect the surface of the electric drill wrench from being damaged.

[0040] As shown in FIG. 2 and FIG. 7, one end of the tire buckle 5 is sleeved on a stand 2, and the other end of the tire buckle 5 is a fixed hook 52 for pressing the pattern on the upper surface of the tire.

[0041] The tire clamp 5 is sleeved on one end of the stand 2 and is composed of two fixed edges 51 connected at the bottom. Each fixed edge 51 includes a vertical fixed edge 511 and an inclined fixed edge 512 which forms an angle greater than 90° with the vertical fixed edge 511. The two vertical fixed edges 511 are respectively connected to the two side surfaces of the top end of the fixed hook 52, and the top ends of the two inclined fixed edges 512 are connected by a bolt 53, and a nut 531 is arranged on the bolt 53. The distance from the bolt 53 to the vertical fixed edge 511 is greater than the width of the stand 2. A screw sleeve 54 is sleeved on the bolt 53, and a rubber sleeve 55 is sleeved on the screw sleeve 54, so as to increase the friction between the tire clamp and the stand, and prevent external force from moving the lifting frame up and down along the stand. When the tire clamp 5 is not used, the fixed hook 52 is inverted as a whole and stored between a vertical sleeve 312 and the stand 2; when the tire clamp 5 is used to press the tire, the fixed hook 52 is pulled out along the stand 2, and is turned over along the angle of the inclined fixed edge, so that the two inclined fixed edges and the bolt tightly hold the stand, and the top end surface of the fixed hook abuts against the stand. In addition, an anti-collision rubber strip 7 is attached to the side of the vertical sleeve which contacts the tire, so as to prevent wear.

[0042] Meanwhile, in order to avoid the tire from being damaged by colliding and rubbing with the front cover plate 412 of the transmission structure during lifting or lowering of the tire by the lifting machine, the present application provides an anti-collision structure on the front cover plate 412. The anti-collision structure is a plastic cover connected to the front cover plate. The plastic cover provides buffering and protection for the collision of the tire.

[0043] In summary, the wheel auxiliary lifting frame of the present application can easily lift the tire or heavy object through the cooperation of the lifter and the transmission structure, and can easily transport the tire or heavy object through the cooperation of the wheel base. The drum mechanism can realize the lifting and forward and backward movement of the tire. The addition of the reduction motor, the electric drill storage box and the electric drill mounting bracket can realize the application of multiple models of electric drills.

[0044] The above-described embodiments are only used to illustrate the present application and not used to limit the scope of the present application. The equivalent changes and modifications made by those skilled in the art to the present application shall belong to the scope covered by the claims of the present application.

Claims

1. A wheel-assisted lift frame, characterized in that, The utility model relates to a vehicle lifting auxiliary system, including: A wheel chassis with a rotating wheel transverse frame is arranged at the bottom; Two columns are fixed at the bottom of the wheel chassis respectively, and a plurality of safety limiting grooves are distributed on the columns; the safety limiting grooves cooperate with the safety buckle to limit the lifting and prevent the falling; The lifter structure is a roller guide lifting frame, including: A support main body including a transverse main rod and two vertical sleeves connected to the transverse main rod, the vertical sleeves are sleeved on the two columns; An adjustable roller mechanism including two horizontal roller assemblies and a sliding tube, the two horizontal roller assemblies are vertically fixed to the transverse main rod, the sliding tube is sleeved on the horizontal roller assemblies, and a limiting space for supporting the tire is formed between the two horizontal roller assemblies and the sliding tube; the transverse main rod has an adjusting hole for adjusting the position of the two horizontal roller assemblies to adapt to tires of different diameters, and the sliding tube can be adjusted in position or rotated relative to the horizontal roller assemblies to enable the tire to move forward and backward and rotate freely on the sliding tube; A guide belt wheel is arranged on the transverse main rod; A transmission structure including a brake box, a hardware screw box, and a transmission belt, the brake box and the hardware screw box are fixed to the top of the two columns; the head end of the transmission belt is fixed on the belt pulley in the brake box through a pin shaft, passes through the guide belt wheel on the transverse main rod, and is locked in the transmission belt fixing clamp in the brake box, so that the lifter structure moves up and down along the columns under the drive of the lithium battery tool or the hand crank under the drive of the transmission structure; A tire buckle is sleeved on one of the columns, and the other end is a fixed hook that presses against the tire tread; after the fixed hook buckles the tire tread, it cooperates with the lifter to ensure that the tire buckle effectively holds the tire, ensuring that the tire does not fall off when the overall lifting auxiliary system is moved.

2. The wheel auxiliary lift frame according to claim 1, characterized in that, The adjustable roller mechanism includes a roller shaft, a roller, a bearing, and the sliding tube, the roller shaft is connected to the transverse main rod; the roller is sleeved on the roller shaft through the bearing.

3. The auxiliary wheel lift of claim 2, wherein, The sliding tube is sleeved on the roller, and the sliding tube is shorter than the roller; the sliding tube can move in the forward and backward directions and rotate in the left and right directions on the roller; the two ends of the roller are provided with clamping grooves, and a plurality of protruding fixing springs are embedded in the clamping grooves to block the sliding tube, so that the sliding tube moves in the two ends of the roller.

4. The wheel assist lift frame of claim 1, wherein, The side of the vertical sleeve that contacts the tire is attached with an anti-collision rubber strip.

5. The auxiliary wheel lift of claim 1, wherein, The tire buckle is sleeved on one end of the column and is composed of two fixed edges connected at the bottom, each fixed edge includes a vertical fixed edge and an inclined fixed edge at an angle greater than 90° with the vertical fixed edge; the two vertical fixed edges are connected to the two sides of the top end of the fixed hook, and the top ends of the two inclined fixed edges are connected by bolts; the distance from the bolt to the vertical fixed edge is greater than the width of the column; When the tire buckle is not in use, the fixed hook is stored between the vertical sleeve and the column. When the tire buckle is used to press the tire, the fixed hook is pulled out along the column, and the angle of the inclined fixed edge is turned over, so that the two inclined fixed edges and the bolt tightly hold the column, and at the same time, the top end surface of the fixed hook abuts against the column.

6. The auxiliary wheel lift of claim 1, wherein, The safety limiting groove is uniformly arranged on one side surface of the column with an interval of 110 mm; the vertical sleeve is provided with a positioning hole, and the safety lock buckle is inserted into the positioning hole and the limiting groove to lock the column and the vertical sleeve.

7. The auxiliary wheel lift of claim 1, wherein, The transmission structure further comprises: A support frame is fixed at the top end of the column; the support frame comprises a top plate and a front cover plate; The front cover plate is arranged on the top plate, and the brake box and the hardware screw box are arranged on the support frame and the front cover plate; The pulley is arranged in the brake box, and one end surface of the pulley is a brake disc; The transmission belt guide is fixed on the support frame; The brake pad is fixed in the brake disc; The brake support is fixed on the front cover plate, and one end of the brake support protrudes and presses the brake pad; the other end of the brake support is provided with a compression spring fixing seat; The compression spring is clamped on the compression spring fixing seat; The brake bolt is fixed above the front cover plate; a pressure adjusting nut is arranged on the stud of the brake bolt, the stud passes through the compression spring, and the pressure of the compression spring is adjusted by the pressure adjusting nut to adjust the pressure of the brake support pressing the brake pad; The speed reducer is connected to the pulley to control the pulley to wind and unwind the transmission belt.

8. The auxiliary wheel lift of claim 7, wherein, The transmission structure further comprises a manual wrench connected to the speed reducer to manually rotate the pulley.

9. A wheel auxiliary lift frame according to claim 7 or 8, characterised in that, The rear end of the speed reducer is provided with a drill mounting bracket connected by two side connecting plates, and the drill mounting bracket is provided with a plurality of adjusting mounting holes.

10. The auxiliary wheel lift of claim 7, wherein, The support frame comprises a top plate and a front cover plate, the front cover plate is fixed on the top plate, and the top plate is fixed at the top end of the column; the front cover plate is provided with an anti-collision structure.

11. The wheel auxiliary lift frame according to claim 10, wherein, The anti-collision structure is a plastic shell connected to the front cover plate.

12. The auxiliary wheel lift of claim 1, wherein, The wheel chassis is a U-shaped structure, and the wheel chassis is fixed on the front or back surface of the column by detachable fixing members to effectively adapt to the use of automobile accessory repair scene, and when the wheel chassis is installed in reverse, a counterweight disc can be connected to maintain the necessary balance during the use of auxiliary lifting frame load.

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