TWI905740B - Unpowered lifting auxiliary device - Google Patents

Abstract

A powerless lifting auxiliary device includes a clamp unit slidably connected to a frame and a counterweight unit. The clamp unit is adapted to be detachably connected to a power tool. The counterweight unit is displaced in opposite directions and is linked to the clamp unit. The weight of the counterweight unit is approximately equal to the weight of the clamp unit plus the power tool, so that when the clamp unit is not pushed by human force, the clamp unit, the tool, and the counterweight unit remain stationary in any position. When the clamp unit is gently pushed by human force, the clamp unit and the counterweight unit displace in opposite directions.

Description

Unpowered lifting auxiliary device

The present invention relates to a powerless lifting assistance device, and more particularly to one that can be configured to allow a handheld electric tool to move up and down effortlessly without the need for power or electricity.

Some commercially available handheld power tools (such as medium or large handheld power mixers) are designed to be lightweight enough for a person to handle without a hand because they need to be held by hand. However, these handheld power tools are usually motor-driven, and some are also equipped with batteries. The motors and batteries themselves have a certain weight, so handheld power tools are usually not very light. When held for a long time, they can still put a lot of strain on the person's arms. Therefore, some people who work with handheld power tools may experience arm pain.

To solve this problem, the present invention provides a powerless lifting auxiliary device, comprising: a frame, the frame including an upper end and a lower end, the frame further including a front end and a rear end located between the upper end and the lower end, the frame further including a first track fixed to the front end; a support unit fixed to the upper end of the frame, the support unit including a support wheel; a clamping unit slidably coupled to the first track, the clamping unit including a suspension portion; and a flexible connecting belt including a first end and a second end, the first end being fixedly connected to the suspension portion of the clamping unit, the flexible connecting belt abutting against the support wheel, the first end and the second end being spaced apart from each other and located on both sides of the support wheel. A counterweight unit is fixed to the second end of the flexible connecting band, such that when the clamp unit is displaced, the counterweight unit is displaced in the opposite direction of the clamp unit's displacement. The weight of the counterweight unit is configured such that when the clamp unit is not pushed by human force, the clamp unit and the counterweight unit remain stationary in any position, and when the clamp unit is gently pushed by human force, the clamp unit and the counterweight unit displace in the opposite direction.

The weight of the counterweight unit is approximately equal to the total weight of the clamp unit plus the power tool. The counterweight unit is connected to the clamp unit in a reverse manner, so that the clamp unit can easily stop at any position without being pushed by hand. Moreover, only a small pushing force is needed to move the clamp unit, the power tool and the counterweight unit together, which can effectively reduce the hand burden of the operator of the power tool.

In one embodiment, the powerless lifting auxiliary device further includes two second tracks spaced apart from each other and fixed to the front end, with the first track located between the two second tracks. The clamping unit further includes a slider, and the clamping unit also includes four side rollers rotatably coupled to opposite ends of the slider and four central rollers rotatably coupled to one end face of the slider, with the four central rollers located between the four side rollers. Furthermore, the four central rollers are pivoted... The rotating shaft is perpendicular to the pivot axes of the four side rollers. The four side rollers are rollably housed in two second tracks, preventing the slider from pivoting about a direction parallel to the pivot axes of each side roller. The first track is located between two central rollers that form a group, preventing the slider from pivoting about a direction parallel to the pivot axes of each central roller. When the clamping unit is displaced, two of the four central rollers rotate in one direction, and the other two rotate in the other direction.

The clamping unit uses four side rollers in conjunction with two second tracks, and four central rollers in conjunction with the first track, to make the clamping unit more stable and slidably connected to the frame without wobbling, thus making the operation of the power tool smoother.

In one embodiment, the powerless lifting assistance device further includes a space between the front end and the rear end, a counterweight unit located within the space, the counterweight unit further including a body and a selectable number of additional blocks, the clamping unit being adapted to engage with a power tool, the counterweight unit selecting the number of additional blocks detachably engaged with the body based on the weight of the clamping unit plus the power tool, such that the weight of the body plus at least one additional block is approximately equal to the weight of the clamping unit plus the power tool.

The selectable number of additional blocks in the counterweight unit allows the clamping unit to be coupled with electrical tools of different weights. The counterweight unit allows for changing the number of additional blocks coupled to the main body, so that the weight of the counterweight unit remains approximately equal to the total weight of the clamping unit and the electrical tool, maintaining the effect that the clamping unit and the electrical tool can be stopped at any position and displaced with a small thrust.

In one embodiment, the powerless lifting auxiliary device further includes an upper connecting rod at the upper end and a lower connecting rod at the lower end. The upper connecting rod is fixed with an upper fixing member, and the lower connecting rod is fixed with a lower fixing member. The frame also includes a support rod, which is fixed to the upper fixing member and the lower fixing member. The main body includes an open support groove, and each of the additional blocks includes a support groove aligned with the support groove. The support rod is slidably accommodated in the support groove of the main body and the support groove of each of the additional blocks.

The support groove of the main body of the counterweight unit and the support groove of each of the additional blocks cooperate with the support rod, so that the counterweight unit can slide stably and smoothly.

In one embodiment, the powerless lifting auxiliary device further includes: a base fixed below the frame, the base including two spaced-apart joints and an opening adjacent to the two joints; and a container housed within the opening and aligned with the clamp unit, the container including two symmetrically spaced joint ends, the two joint ends being detachably hinged to the two joints, such that the container is allowed to rotate about the two joints as pivot axes.

The container is hinged to the two joints and is therefore pivotable, allowing the container to be pivoted to change angles during operation of the power tool, making food processing more convenient.

In one embodiment, the powerless lifting auxiliary device further includes: two upper stops, wherein the frame further includes two second tracks spaced apart from each other and fixed to the front end, the first track being located between the two second tracks, the clamping unit 54 being slidably engaged with the two second tracks, the two upper stops being fixed to the front end and located between the upper end and the two second tracks, the two upper stops being aligned with the two second tracks such that the clamping unit cannot disengage from the upper end from the two second tracks; Two lower stop members are fixed at the front end and located between the lower end and the two second tracks. The two lower stop members are aligned with the two second tracks so that the clamp unit cannot detach from the lower end and the two second tracks.

The two upper stops, together with the two lower stops, can prevent the clamp unit from being restricted to a safe range of movement, thereby improving safety during use.

The present invention also provides a powerless lifting auxiliary device, comprising: a frame including an upper end and a lower end; and a clamping unit slidably coupled to the frame, the clamping unit being adapted to be detachably coupled to a power tool; A counterweight unit is coupled to the clamp unit in a counter-displacement manner, such that when the clamp unit moves towards the upper end, the counterweight unit moves towards the lower end, and when the clamp unit moves towards the lower end, the counterweight unit moves towards the upper end. The weight of the counterweight unit is approximately equal to the weight of the clamp unit plus the power tool. This results in the clamp unit, the tool, and the counterweight unit remaining stationary in any position when the clamp unit is not pushed by human force, and the clamp unit and the counterweight unit moving in opposite directions when the clamp unit is gently pushed by human force.

The weight of the counterweight unit is approximately equal to the total weight of the clamp unit plus the power tool. The counterweight unit is connected to the clamp unit in a reverse manner, so that the clamp unit can easily stop at any position without being pushed by hand. Moreover, only a small pushing force is needed to move the clamp unit, the power tool and the counterweight unit together, which can effectively reduce the hand burden of the operator of the power tool.

In one embodiment, the powerless lifting auxiliary device further includes a front end and a rear end located between the upper end and the lower end of the frame. The frame also includes a first track fixed to the front end and two second tracks spaced apart and fixed to the front end, with the first track located between the two second tracks. The clamping unit further includes a slider and four side rollers rotatably coupled to opposite ends of the slider. Four central rollers are rotatably coupled to one end face of the slider, the four central rollers being positioned between the four side rollers. Furthermore, the pivot axes of the four central rollers are perpendicular to the pivot axes of the four side rollers. The four side rollers are rollably accommodated in two second tracks, preventing the slider from pivoting about a direction parallel to the pivot axes of each side roller. The four central rollers are rollably coupled to the first track, preventing the slider from pivoting about a direction parallel to the pivot axes of each central roller.

The clamping unit uses four side rollers in conjunction with two second tracks, and four central rollers in conjunction with the first track, to make the clamping unit more stable and slidably connected to the frame without wobbling, thus making the operation of the power tool smoother.

In one embodiment, the powerless lifting auxiliary device further includes a space between the front end and the rear end, a counterweight unit located within the space, and the counterweight unit further includes a body and a plurality of additional blocks. The number of additional blocks detachably coupled to the body is selected based on the weight of the clamping unit plus the power tool, such that the weight of the body plus at least one additional block is approximately equal to the weight of the clamping unit plus the power tool.

The selectable number of additional blocks in the counterweight unit allows the clamping unit to be coupled with electrical tools of different weights. The counterweight unit allows for changing the number of additional blocks coupled to the main body, so that the weight of the counterweight unit remains approximately equal to the total weight of the clamping unit and the electrical tool, maintaining the effect that the clamping unit and the electrical tool can be stopped at any position and displaced with a small thrust.

In one embodiment, the powerless lifting auxiliary device further includes: two support units fixedly mounted on the upper end and spaced apart from each other; the frame further includes a front end and a rear end located between the upper end and the lower end; the frame also includes a space located between the front end and the rear end; each support unit includes two support wheels, one of the support wheels of each support unit being close to the front end and the other support wheel being close to the rear end; Two flexible connecting strips, each of the flexible connecting strips abutting against the two support wheels of one of the support units, each of the flexible connecting strips including a first end and a second end, each of the first ends being located on the outer side of the front end and sleeved with the clamp unit, each of the second ends being located between the front end and the rear end and fixedly connected to the counterweight unit.

The invention will be more clearly understood with the detailed explanation of the illustrative embodiments illustrated in the diagrams.

All diagrams are for illustrative purposes only. The diagrams will explain the number, position, relationship, and dimensional extensions of the components used in the illustrative examples, or, after reading and understanding the following descriptions, will be considered industry skills. In addition, after reading and understanding the following descriptions, the ability to adapt precise dimensions and changes in dimensional proportions to specific forces, weights, strengths, and similar requirements is also considered industry skills.

This invention is a powerless lifting assistance device, particularly a lifting assistance device that assists commercially available tools in raising and lowering the object effortlessly by achieving balance through counterweight without requiring external electricity or other power sources. Referring to Figures 1-6, the lifting auxiliary device 10 includes a frame 20, which includes an upper end 26 and a lower end 28. The frame 20 further includes a front end 22 and a rear end 24 extending between the upper end 26 and the lower end 28. The frame 20 also includes a space 21 located between the front end 22 and the rear end 24. In fact, the space 21 is also located between the upper end 26 and the lower end 28. The frame 20 also includes an upper connecting rod 27 fixed to the upper end 26 and a lower connecting rod 48 fixed to the lower end 28. The upper connecting rod 27 is fixed with an upper fixing member 38, and the lower connecting rod 48 is fixed with a lower fixing member 50.

The frame 20 also includes a first track 30 and two second tracks 32 fixed to the front end 22. The first track 30 is located between the two second tracks 32. The first track 30 and each of the second tracks 32 extend longitudinally in a direction parallel to the upper end 26 and the lower end 28. The upper fixing member 38 and the lower fixing member 50 jointly fix a support rod 40, which is parallel to the first track 30 and located within the space 21.

The lifting auxiliary device 10 further includes two support units 34 fixedly mounted on the upper end 26 and spaced apart from each other. The two support units 34 are located between the two second tracks 32. Each support unit 34 includes two support wheels 36. One of the support wheels 36 of each support unit 34 is close to the front end 22 and the other support wheel 36 is close to the rear end 24.

Two upper baffles 42 and two lower baffles 44 are fixed at the front end 22 of the frame 20. The two upper baffles 42 are located at the upper end 26 and aligned with the two second tracks 32. The two lower baffles 44 are located at the lower end 28 and aligned with the two second tracks 32. Thus, each second track 32 is located between one upper baffle 42 and one lower baffle 44 along the longitudinal direction.

The lifting auxiliary device 10 includes a clamping unit 54 slidably coupled to the frame 20. The clamping unit 54 includes a sliding member 56, which includes two suspension portions 58 formed on the upper side and spaced apart from each other. The clamping unit 54 further includes four side rollers 60 and four central rollers 62. The four side rollers 60 are rotatably coupled to opposite sides of the sliding member 56 in pairs. The four central rollers 62 are rotatable. The four central rollers 62 are located between the four side rollers 60 and are connected to one end face of the sliding member 56. The four central rollers 62 are spaced apart along the longitudinal axis in pairs. Furthermore, the pivot axes of the four central rollers 62 are perpendicular to the pivot axes of the four side rollers 60. In other words, the pivot axes of the four central rollers 62 are perpendicular to the front end 22, and the pivot axes of the four side rollers 60 are perpendicular to the pivot axes of the four central rollers 62.

The clamp unit 54 also includes a clamp 64 detachably coupled to the slide member 56. In fact, the clamp 64 is screwed to the slide member 56 by four screws. Each of the clamp 64 and the slide member 56 has a V-shaped groove on one of their opposing surfaces for accommodating a commercially available power tool 86 (for example, a large handheld power mixer shown in Figure 6).

The four side rollers 60 of the clamp unit 54 are rollably housed within two second tracks 32, such that the clamp unit 54 can be displaced along the two second tracks 32 between each of the upper stops 42 and each of the lower stops 44. The two second tracks 32 restrict the clamp unit 54 from pivoting in a direction parallel to the pivot axis of each of the side rollers 60.

The four central rollers 62 of the clamping unit 54 are rotatably coupled to the first track 30. Referring to Figures 4 and 6, the two uppermost central rollers 62 are in one group and the two lowermost central rollers are in another group. The first track 30 is located between the two groups of central rollers 62, causing the slider 56 to be unable to pivot about a direction parallel to the pivot axis of each central roller. When the clamping unit 54 is displaced, two of the four central rollers 62 rotate in one direction and the other two rotate in the other direction.

The lifting assistance device 10 further includes two flexible connecting belts 76, each of which includes a first end 78 and a second end 80. Each flexible connecting belt 76 abuts against two support wheels 36 of a set of support units 34. The first end 78 of each flexible connecting belt 76 is fixedly connected to the two suspended portions 58 of the clamp unit 54. Therefore, the first end 78 of each flexible connecting belt 76 is located outside the front end 22 of the frame 20, and the second end 80 of each flexible connecting belt 76 extends around the corresponding support unit 34 into the space 21 (located between the front end 22 and the rear end 24). Therefore, it can be understood that the first end 78 and the second end 80 of each of the flexible connecting strips 76 are located on different sides of each of the support units 34. When the clamp unit 54 is displaced, causing the two first ends 78 to move towards the upper end 26, the two second ends 80 will move towards the lower end 28. When the clamp unit 54 is displaced, causing the two first ends 78 to move towards the lower end 28, the two second ends 80 will move towards the upper end 26.

The lifting auxiliary device 10 further includes a counterweight unit 66 that is displaced in the opposite direction to the clamp unit 54. The counterweight unit 66 includes a body 68, which includes two connecting parts 70 located on opposite sides and a support groove 72 located between the two connecting parts 70. The body 68 is housed within the space 21. The support rod 40 is slidably connected to the support groove 72. The second ends 80 of the two flexible connecting bands 76 are fixedly connected to the two connecting parts 70 of the body 68. Therefore, it can be understood that when the clamping unit 54 moves toward the upper end 26, the body 68 will move toward the lower end 28, and when the clamping unit 54 moves toward the lower end 28, the body 68 will move toward the upper end 26.

It is worth mentioning that the body 68 can be, but is not limited to, being designed with a weight approximately equal to the weight of the clamping unit 54 (excluding the power tool 86). Referring to Figure 5, an embodiment is shown assuming the weight of the body 68 is equivalent to the weight of the slider 56. In this state, the first end 78 and the second end 80 of each of the flexible connecting straps 76 suspend the clamping unit 54 and the body 68, respectively. Therefore, each of the flexible connecting straps 76 generates frictional resistance against the two support wheels 36 of each support unit 34. Since the weight of the body 68 is approximately equal to the weight of the clamping unit 54, the two flexible... The frictional resistance generated by the connecting belt 76 and the two support units 34 (the clamp unit 54) allows the clamp unit 54 and the body 68 to remain at any position between the upper stop 42 and the lower stop 44 when the clamp unit 54 is not manually pushed. Moreover, as long as the pushing force applied to the clamp unit 54 is greater than the aforementioned frictional resistance, the clamp unit 54 and the body 68 can be easily moved in the opposite direction.

The counterweight unit 66 further includes a selectable number of additional blocks 74, each of the additional blocks 74 including a support groove 75 aligned with the support groove 72. Assuming the clamp unit 54 is combined with a power tool 86 (e.g., a large handheld power mixer), the weight of the clamp unit 54 plus the power tool 86 will be greater than the weight of the main body 68. This results in an excessive weight difference between the clamp unit 54 and the main body 68, making the friction between the two flexible connecting straps 76 and the two support units 34 insufficient to keep the clamp unit 54 stationary. Moving the clamp unit 54 and the power tool 86 would then be difficult. Therefore, additional blocks 74 are needed to match the total weight of the clamp unit 54 plus the power tool 86.

Each of the additional blocks 74 (the number of which is adjusted according to the total weight of the clamp unit 54 plus the power tool 86) can be, but is not limited to, being attached to the bottom of the body 68. Referring to Figures 6 and 7, assuming that the total weight of the clamp unit 54 plus the power tool 86 requires the addition of three additional blocks 74, the three additional blocks 74 are stacked and aligned together and then pressed against the bottom of the body 68. The three additional blocks 74 are further secured to the body 68 using two fasteners 77. The support groove 75 of each additional block 74 is aligned with the support groove 72 of the body 68, so that the support rod 40 is also slidably engaged with the support groove 75 of each additional block 74.

When the counterweight unit 66 is configured with at least one of the additional blocks 74 to a weight approximately equal to the total weight of the clamp unit 54 plus the power tool 86, the clamp unit 54 is able to support the power tool 86 at any position between the upper stops 42 and the lower stops 44, and the clamp unit 54 is able to support the power tool 86 to move when a small pushing force is applied manually.

The lifting assistance device 10 of the present invention further includes a base 46 fixed below the frame 20 and a container 82. The base 46 includes two spaced-apart joints 52 and an opening 47 adjacent to the two joints 52. The container 82 includes two symmetrically formed joint ends 84 on its outer peripheral surface.

The container 82 is housed within the opening 47, and the two connecting ends 84 are detachably connected to the two connecting parts 52, so that the container 82 is substantially aligned with the power tool 86. Furthermore, the container 82 allows the two connecting parts 52 to be used as pivots for rotation.

Referring to Figures 6-8, when food to be processed (e.g., tea leaves) is to be placed into the container 82, the electric tool 86 or the clamping unit 54 is pushed towards the upper end 26 by hand, so that the electric tool 86 and the clamping unit 54 are away from the container 82. In this way, the food to be processed can be placed into the container 82 more easily. Furthermore, the electric tool 86 and the container 82 can be pushed again to move the electric tool 86 and the clamping unit 54 closer to the container 82, so that a tool head (e.g., a stirring rod) of the electric tool 86 extends into the container 82 to process (e.g., stir) the food.

From the foregoing description, it should be understood that the lifting assistance device 10 of the present invention has at least the following advantages. For example, the weight of the counterweight unit 66 is approximately equal to the total weight of the clamp unit 54 plus the power tool, and the counterweight unit 66 is coupled to the clamp unit 54 in a reverse linkage, so that the clamp unit 54 can easily stop at any position without being pushed by hand, and only a small pushing force is needed to move the clamp unit 54, the power tool 86 and the counterweight unit 66 together, which can effectively reduce the hand burden of the operator of the power tool 86.

The clamping unit 54, through the four side rollers 60 cooperating with the two second tracks 32, and further through the four central rollers 62 cooperating with the first track 30, allows the clamping unit 54 to be more stably and smoothly coupled to the frame 20 without wobbling, making the operation of the power tool 86 smoother.

The container 82 is hinged to the two joints 52 and is therefore pivotable, allowing the container 82 to be pivoted to change angles during operation of the power tool 86, making food processing more convenient.

The selectable number of additional blocks 74 in the counterweight unit 66 allows the clamping unit 54 to be coupled with electrical tools of different weights. The counterweight unit 66 allows for changing the number of additional blocks 74 coupled with the body 68, so that the weight of the counterweight unit 66 is kept approximately equal to the total weight of the clamping unit 54 and the electrical tool 86, maintaining the effect that the clamping unit 54 and the electrical tool 86 can be stopped at any position and displaced with a small pushing force.

The support groove 72 of the body 68 of the counterweight unit 66 and the support groove 75 of each of the additional blocks 74 cooperate with the support rod 40, so that the counterweight unit 66 can slide stably and smoothly.

The two upper stoppers 42, together with the two lower stoppers 44, can prevent the clamp unit 54 from being restricted to a safe range of movement, thereby improving safety during use.

The basic teachings of this invention have been explained, and many extensions and variations will be readily apparent to those with ordinary skills in the field. For example, the counterweight unit 66 may not include the additional blocks 74. For instance, the clamp unit 54 may be combined with a single power tool 86. Without changing the power tool 86, the body 68 of the counterweight unit 66 can be directly designed to be approximately equal to the weight of the clamp unit 54 plus the power tool 86. In this way, the clamp unit 54 and the power tool 86 can remain in any position without external force, and only a small pushing force is needed to move the clamp unit 54 and the power tool 86. Alternatively, the power tool 86 shown in the figures of this invention is merely an embodiment of a known commercially available power tool 86 and is not intended to limit the lifting assistance device 10 of this invention to only be used with the power tool 86 shown in the figures.

Since the invention disclosed in this specification may be practiced in other specific forms without departing from the spirit or general characteristics of the invention, and some of these specific forms have been pointed out, the embodiments disclosed in this specification should be regarded as illustrative rather than limiting. The scope of the invention is defined by the appended patent application, not by the foregoing description, and all changes to the scope and meaning that fall within the scope of the patent application shall still be included within its scope.

10 Lifting Auxiliary Device 20 Frame 21 Space 22 Front End 24 Rear End 26 Upper End 27 Upper Connecting Rod 28 Lower End 30 First Rail 32 Second Rail 34 Support Unit 36 Support Roller 38 Upper Fixing Component 40 Support Rod 42 Upper Stopping Component 44 Lower Stopping Component 46 Base 47 Opening 48 Lower Connecting Rod 50 Lower Fixing Component 52 Joint 54 Clamping Unit 56 Sliding Component 58 Suspension Part 60 Side Roller 62 Central Roller 64 Clamping Block; 66 Counterweight Unit; 68 Main Body; 70 Joint; 72 Support Groove; 74 Additional Block; 75 Support Groove; 76 Flexible Connector; 77 Screwdriver; 78 First End; 80 Second End; 82 Container; 84 Joint End; 86 Power Tool

Figure 1 is an exploded view of the unpowered lifting auxiliary device of the present invention.

Figure 2 is a three-dimensional assembly diagram of the powerless lifting auxiliary device of the present invention.

Figure 3 is a three-dimensional composite view of the powerless lifting auxiliary device of the present invention from another angle.

Figure 4 is a cross-sectional view taken along line 4-4 in Figure 2.

Figure 5 is a cross-sectional view taken along line 5-5 of Figure 2.

Figure 6 is a front view of the unpowered lifting auxiliary device of the present invention.

Figure 7 is a cross-sectional view taken along line 7-7 of Figure 6.

Figure 8 is a diagram showing the state of the clamp unit moving downwards and the counterweight unit moving upwards.

The same or similar components are identified by the same labels in different drawings; in addition, please understand that terms such as "top", "bottom", "first", "second", "forward", "backward", "reverse", "front", "back", "height", "width", "length", "end", "side", "horizontal", "vertical", etc. and similar terms are only for the convenience of the viewer to refer to the structure in the drawing and are only used to help describe and explain the embodiments.

10 Lifting Auxiliary Device 20 Frame 22 Front End 24 Rear End 26 Upper End 27 Upper Connecting Rod 28 Lower End 30 First Rail 32 Second Rail 34 Support Unit 36 Support Roller 38 Upper Fixture 40 Support Rod 42 Upper Stopper 44 Lower Stopper 46 Base 47 Opening 48 Lower Connecting Rod 50 Lower Fixture 52 Joint 54 Clamp Unit 56 Sliding Part 58 Suspension Part 60 Side Roller 62 Central Roller 64 Clamping Block 66 Counterweight Unit 68 Main Body 70 Joint 72 Support Groove 74 Additional Block 75 Support Groove 76 Flexible Connector 77 Screwdriver 78 First End 80 Second End 82 Container 84 Joint End

Claims (10)

A powerless lifting auxiliary device includes: a frame, the frame including an upper end and a lower end, the frame further including a front end and a rear end located between the upper end and the lower end, the frame further including a first track fixed to the front end; a support unit fixed to the upper end of the frame, the support unit including a support wheel; a clamping unit slidably coupled to the first track, the clamping unit including a suspension portion; a flexible connecting belt including a first end and a second end, the first end being fixedly connected to the suspension portion of the clamping unit, the flexible connecting belt abutting against the support wheel, the first end and the second end being spaced apart from each other and located on opposite sides of the support wheel; A counterweight unit is fixed to the second end of the flexible connecting band, such that when the clamp unit is displaced, the counterweight unit displaces in the opposite direction of the clamp unit's displacement. The weight of the counterweight unit is configured such that when the clamp unit is not pushed by human force, both the clamp unit and the counterweight unit remain stationary in any position; when the clamp unit is lightly pushed by human force, both the clamp unit and the counterweight unit displace in the opposite direction. As described in claim 1, the powerless lifting auxiliary device further includes two second tracks spaced apart from each other and fixed to the front end, with the first track located between the two second tracks. The clamping unit further includes a slider. The clamping unit also includes four side rollers rotatably coupled to opposite ends of the slider and four central rollers rotatably coupled to one end face of the slider. The four central rollers are located between the four side rollers. Furthermore, the four central rollers... The pivot axis is perpendicular to the pivot axes of the four side rollers. The four side rollers are rollably accommodated in two second tracks, preventing the slider from pivoting about a direction parallel to the pivot axis of each side roller. The first track is located between two central rollers that form a group, preventing the slider from pivoting about a direction parallel to the pivot axis of each central roller. When the clamping unit is displaced, two of the four central rollers rotate in one direction, and the other two rotate in the other direction. As described in claim 1, the unpowered lifting auxiliary device, wherein the frame further includes a space located between the front end and the rear end, the counterweight unit is located within the space, the counterweight unit further includes a body and a selectable number of additional blocks, the clamping unit is adapted to be coupled to a power tool, the counterweight unit selects the number of additional blocks detachably coupled to the body based on the weight of the clamping unit plus the power tool, such that the weight of the body plus at least one additional block is approximately equal to the weight of the clamping unit plus the power tool. As described in claim 3, the non-powered lifting auxiliary device further includes an upper connecting rod at the upper end and a lower connecting rod at the lower end. The upper connecting rod is fixed with an upper fixing member, and the lower connecting rod is fixed with a lower fixing member. The frame also includes a support rod, which is fixedly connected to the upper fixing member and the lower fixing member. The main body includes an open support groove, and each of the additional blocks includes a support groove aligned with the support groove. The support rod is slidably accommodated in the support groove of the main body and the support groove of each of the additional blocks. The unpowered lifting auxiliary device as described in claim 1 further comprises: a base fixed below the frame, the base including two spaced-apart joints and an opening adjacent to the two joints; a container housed within the opening and aligned with the clamp unit, the container including two symmetrically spaced joint ends, the two joint ends being detachably hinged to the two joints, such that the container allows rotation about the two joints as pivot axes. The unpowered lifting auxiliary device as described in claim 1 further comprises: two upper stops, wherein the frame further comprises two second tracks spaced apart from each other and fixed to the front end, the first track being located between the two second tracks, the clamping unit being slidably engaged with the two second tracks, the two upper stops being fixed to the front end and located between the upper end and the two second tracks, the two upper stops being aligned with the two second tracks such that the clamping unit cannot disengage from the upper end from the two second tracks; Two lower stoppers are fixed at the front end and positioned between the lower end and the two second tracks. The two lower stoppers are aligned with the two second tracks to prevent the clamp unit from disengaging from the lower end and from the two second tracks. A powerless lifting auxiliary device includes: a frame, including an upper end and a lower end; a clamping unit slidably coupled to the frame, the clamping unit being adapted for detachable coupling with a power tool; A counterweight unit is coupled to the clamping unit in a counter-displacement manner, such that when the clamping unit moves towards the upper end, the counterweight unit moves towards the lower end, and vice versa. The weight of the counterweight unit is approximately equal to the weight of the clamping unit plus the power tool. This results in the clamping unit, the tool, and the counterweight unit remaining stationary in any position when not pushed by human force. When the clamping unit is gently pushed by human force, the clamping unit and the counterweight unit undergo counter-displacement. As described in claim 7, the unpowered lifting auxiliary device further includes a front end and a rear end located between the upper end and the lower end. The frame also includes a first track fixed to the front end and two second tracks spaced apart and fixed to the front end, the first track located between the two second tracks. The clamping unit further includes a slider, and the clamping unit also includes four side rollers rotatably coupled to opposite ends of the slider. Four central rollers are rotatably coupled to one end face of the slider, the four central rollers being positioned between the four side rollers. Furthermore, the pivot axes of the four central rollers are perpendicular to the pivot axes of the four side rollers. The four side rollers are rollably accommodated in two second tracks, preventing the slider from pivoting about a direction parallel to the pivot axes of each side roller. The four central rollers are rollably coupled to the first track, preventing the slider from pivoting about a direction parallel to the pivot axes of each central roller. As described in claim 8, the unpowered lifting auxiliary device further includes a space between the front end and the rear end, the counterweight unit is located within the space, and the counterweight unit further includes a body and a plurality of additional blocks. The number of additional blocks detachably coupled to the body is selected based on the weight of the clamping unit plus the power tool, such that the weight of the body plus at least one additional block is approximately equal to the weight of the clamping unit plus the power tool. The unpowered lifting auxiliary device as described in claim 7 further comprises: two support units fixedly mounted on the upper end and spaced apart from each other; the frame further includes a front end and a rear end located between the upper end and the lower end; the frame also includes a space located between the front end and the rear end; each support unit includes two support wheels, one support wheel of each support unit being closer to the front end and the other support wheel being closer to the rear end; Two flexible connecting strips, each abutting against the two support wheels of one of the support units, each flexible connecting strip including a first end and a second end, each first end located outside the front end and sleeved with the clamp unit, each second end located between the front end and the rear end and fixedly connected to the counterweight unit.