Angle-adjustable balance support

Abstract

The utility model discloses an angle-adjustable balance support which comprises a support body, a rolling wheel, a lifting rope and a first elastic piece, the lifting rope is arranged on the support body, the fixed end of the lifting rope is connected to the rolling wheel, the free end of the lifting rope is used for being connected with an operation tool to be hung, the rolling wheel is rotatably arranged on the support body, and the first elastic piece is arranged on the rolling wheel. The support body comprises a fixing frame and a lifting arm, one end of the lifting arm is hinged to the upper end of the fixing frame, the free end of the lifting rope is arranged on the lifting arm, the lifting arm swings up and down relative to the fixing frame so as to change the height position of the free end of the lifting rope, and a first locking mechanism is arranged between the lifting arm and the fixing frame. When the suspension arm swings relative to the fixing frame to enable the free end of the lifting rope to reach the set height, the first locking mechanism is used for keeping the suspension arm and the fixing frame fixed and not rotating, the balance support can adjust the height of a suspended object according to the requirement of the operation height, and the applicability is higher.

Description

Technical Field

[0001] This utility model relates to the technical field of aerial work platforms, and more particularly to an angle-adjustable balance support. Background Technology

[0002] In daily production and life, various handheld tools are frequently used, such as chainsaws, electric drills, cutting machines, impact hammers, high-pole shears, and high-pole saws. Because these power tools are heavy, the operator holds them with both hands throughout the process and performs the corresponding actions, which puts a great strain on the operator's body. Especially for high-level operations, the operator needs to lift the tools with both hands for a long time to operate them, such as pruning high branches with high-pole shears or high-pole saws.

[0003] To address the aforementioned issues, balancing supports have emerged in the market to assist in operations. For example, patent CN118579678A discloses a backpack-type lifting device, which includes a support assembly comprising a bracket and a boom, the bracket and boom being fixedly connected; a backpack assembly, fixedly connected to the bracket, for the operator to carry the load; a lifting assembly comprising a winding reel, a traction cable, and a pulley system, the winding reel being rotatably connected to the bracket, the fixed end of the traction cable being connected to the winding reel, the winding reel being able to wind or release the traction cable, the pulley system being rotatably connected to the boom, the free end of the traction cable passing through the pulley system, the pulley system being used to change the direction of the traction cable, and the free end of the traction cable being able to connect to the object to be lifted; and a reset assembly, fixedly connected to the winding reel, the reset assembly being used to cause the winding reel to wind the traction cable, achieving a balance between the tension of the traction cable wound by the winding reel and the weight of the suspended object to be lifted, thus maintaining the object at a certain height to assist the operator in operation.

[0004] The problem with the auxiliary support disclosed in the existing patent is that the boom and the support are fixedly connected. This structure can only balance the suspended work tool at one height and cannot be changed according to the working height. If the working position is changed from one position to another position at a higher height, the operator still needs to exert force to lift the work tool. Continuous operation will still put a burden on the operator's body, and its applicability is poor. Utility Model Content

[0005] Since the boom and the support are fixedly connected, this structure can only balance the hoisted work tool at one height and cannot be changed according to the working height. If the working position is changed from one position to another position at a higher height, the operator still needs to exert force to lift the work tool. Continuous operation will still put a burden on the operator's body, resulting in poor applicability. This utility model provides an angle-adjustable balance support.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an angle-adjustable balance support, including a support body, a winding reel, a suspension rope, and a first elastic element. The suspension rope is arranged on the support body, the fixed end of the suspension rope is connected to the winding reel, and the free end of the suspension rope is used to connect the work tool to be suspended. The winding reel is rotatably arranged on the support body and can wind or release the suspension rope. The first elastic element is connected to the winding reel and is used to drive the winding reel to wind the suspension rope. The support body includes a fixed frame and a boom. One end of the boom is hinged to the upper end of the fixed frame. The free end of the suspension rope is arranged on the boom. The boom swings up and down relative to the fixed frame to change the height position of the free end of the suspension rope. A first locking mechanism is provided between the boom and the fixed frame. When the boom swings relative to the fixed frame and the free end of the suspension rope reaches a set height, the first locking mechanism is used to keep the boom and the fixed frame fixed and not rotated.

[0007] A further preferred embodiment of this utility model is that a second locking mechanism for locking the rotation of the winding wheel is provided between the support body and the winding wheel.

[0008] A further preferred embodiment of this invention is as follows: the second locking mechanism includes a second elastic element, a locking groove disposed on the winding reel, and a locking member movably disposed on the support body. The locking member engages or disengages with the corresponding locking groove by movement. The second elastic element drives the locking member to move and reset. The locking member has a mating portion, and the support body has a first part and a second part corresponding to the mating portion. There is a height difference between the first part and the second part. The locking member can rotate around a first axis on the support body to switch between a locked position and an unlocked position.

[0009] When the locking member rotates to the unlocked position, the mating part is opposite to the first part, and the locking member moves to the outside of the locking groove, allowing the winding wheel to rotate relative to the bracket body.

[0010] When the locking member rotates to the locking position, the mating part is opposite to the second part, and the locking member moves to be inserted into the locking groove so that the relative rotation between the winding wheel and the bracket body is locked.

[0011] A further preferred embodiment of this utility model is as follows: four locking slots are provided, and the four locking slots are arranged in a ring on the end face of the winding wheel with the axis of the winding wheel as the center. The locking member is inserted into one of the locking slots to lock the rotation of the winding wheel and the support body.

[0012] A further preferred embodiment of this utility model is as follows: the first part is configured as a first slot, the second part is configured as a second slot, the bottom of the first slot and the bottom of the second slot have a height difference, the mating part is configured as a plug for inserting and mating with the first slot or the second slot, the plug is inserted into the corresponding first slot or the second slot to restrict the locking member from rotating relative to the support body, when the locking member moves to one side relative to the support body under the action of external force, the plug disengages from the first slot or the second slot, at this time, the locking member can rotate relative to the support body to change the position of the mating part, when the locking member loses force, the second elastic member drives the locking member to move and reset, so that the plug is inserted into the corresponding first slot or the second slot.

[0013] A further preferred embodiment of this utility model is as follows: the fixing frame includes a support rod and a housing. The housing is fixed to the lower end of the support rod, and the boom is hinged to the upper end of the support rod. The housing has a cavity for accommodating the winding wheel and the first elastic element. The winding wheel is rotatably installed in the cavity. The first elastic element is a coil spring, one end of which is connected to the winding wheel. The locking element includes a locking pin for engaging with a locking groove and a control button. The housing has a through hole connecting the interior and exterior. The locking pin is movably inserted into the through hole. The inner end of the locking pin is opposite to the winding wheel, and the outer end of the locking pin is fixedly connected to the control button. The outer side of the housing has an outer groove connected to one end of the through hole. The control button is located on the exterior of the housing and opposite to the outer groove. A first slot and a second slot are located in the outer groove. The bottom of the first slot is higher than the bottom of the second slot. A plug is located on the inner side of the control button and is inserted into the outer groove to engage with the first slot or the second slot.

[0014] A further preferred embodiment of this utility model is as follows: an inner groove is provided on the inner side of the housing, which is opposite to the winding wheel. The inner groove is connected to the end of the through hole away from the outer groove. A first step is provided on the outer side wall of the locking pin. The second elastic element is a return spring, which is sleeved on the locking pin. One end of the return spring abuts against the inner wall of the inner groove, and the other end of the return spring abuts against the first step. The return spring has an elastic force that pushes the locking pin to move towards the winding wheel. When the insert is inserted into the first slot, the inner end of the locking pin disengages from the locking groove and is completely contained within the inner groove.

[0015] A further preferred technical solution of this utility model is: a guide pulley is provided on the main body of the support, and the suspension rope passes around the guide pulley.

[0016] A further preferred embodiment of this utility model is as follows: the first locking mechanism is a gas spring, one end of which is hinged to the boom, and the other end of which is hinged to the fixed frame. The gas spring is supported between the boom and the fixed frame.

[0017] A further preferred embodiment of this utility model is as follows: the main body of the support also includes a back frame, which is fixedly connected to the fixed frame, and the back frame is provided with a carrying strap for carrying.

[0018] Compared with the prior art, the advantage of this utility model is that the boom and the fixed frame are rotatable. When it is necessary to work at other height positions, the angle between the boom and the fixed frame can be adjusted by swinging up or down. Then, the first locking mechanism keeps the boom and the fixed frame at the adjusted angle, thereby changing the height of the free end of the hoisting rope on the boom so that the working tool connected to the free end of the hoisting rope is at the required height position. The balance bracket can adjust the height of the suspended object according to the working height requirements, making it more versatile. Attached Figure Description

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a diagram showing the usage state of this utility model;

[0022] Figure 3 This is a half-sectional schematic diagram of the present invention;

[0023] Figure 4 This is a schematic diagram of the fixed frame structure;

[0024] Figure 5 This is a schematic diagram of the shell structure;

[0025] Figure 6 Exploded views of the components in the shell area;

[0026] Figure 7 Exploded view of the winding wheel and shaft;

[0027] Figure 8 This is a schematic diagram of the right half of the shell;

[0028] Figure 9 This is a schematic diagram showing the disassembly of the locking component;

[0029] Figure 10 This is a cross-sectional view of the shell section;

[0030] Figure 11 for Figure 10 A magnified view of part A;

[0031] Figure 12 A cross-sectional view showing the locking element and the winding reel in the unlocked state;

[0032] Figure 13 for Figure 12 A magnified view of section B;

[0033] Figure 14 This is a cross-sectional view of the insert block when it is inserted into the first slot.

[0034] Figure 15 for Figure 14 A magnified view of a portion at point C;

[0035] Figure 16 A cross-sectional diagram showing the locking element inserted into the locking groove to lock the winding wheel;

[0036] Figure 17 for Figure 16 A magnified view of a portion at point D;

[0037] Figure 18 This is a cross-sectional view of the insert block being inserted into the second slot.

[0038] Figure 19 for Figure 18 A magnified view of a portion at point E.

[0039] In the diagram: 1. Support body; 2. Gas spring; 3. Fixing frame; 4. Back frame; 5. Boom; 6. Working tools; 7. Lifting rope; 8. Opening; 9. Third guide pulley; 10. Hinge frame; 11. Support rod; 12. Mounting frame; 13. Housing; 14. Second guide pulley; 15. First guide pulley; 16. Winding reel; 17. Shaft; 18. Locking element; 19. Left half of the housing; 20. Right half of the housing; 21. Rope groove; 22. Outer groove; 23. Locking groove; 24. Return spring; 25. Bearing; 26. Side cover; 27. Coil spring; 28. Wheel body; 29. ​​Coil spring groove; 30. Limiting partition; 31. First slot; 32. Limiting area; 33. Second slot; 34. Control button; 35. Insert block; 36. Reinforcing block; 37. Center groove; 38. Locking pin; 39. First step; 40. Outer ring edge; 41. Receiving cavity; 42. Through hole; 43. Inner groove; 44. Second step. Detailed Implementation

[0040] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0041] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0042] Figures 1-19 The adjustable-angle balance bracket includes a bracket body 11 and a suspension device.

[0043] Figures 1-3 As shown, the suspension device is mounted on the support body 1. The suspension device includes a take-up reel 16, a suspension rope 7, and a first elastic element. The suspension rope 7 is laid on the support body 1. The support body 1 is provided with a guide pulley to guide the suspended rope 7. The fixed end of the suspension rope 7 is connected to the take-up reel 16, and the free end of the suspension rope 7 is used to connect the work tool 6 to be suspended. The take-up reel 16 is rotatably mounted on the support body 1. The take-up reel 16 can wind or release the suspension rope 7. The first elastic element is connected to the take-up reel 16. The elastic force of the first elastic element is applied to the take-up reel 16 to drive the take-up reel 16 to rotate and wind up the suspension rope 7.

[0044] The work tool 6 is connected to the free end of the suspension rope 7. The elastic force applied to the take-up reel 16 by the first elastic element is balanced with the weight of the connected work tool 6, thus suspending the work tool 6. The operator holds the suspended work tool 6 to perform the work. The balance bracket assists the operator in holding the work tool 6, reducing the physical burden on the operator and lowering the labor intensity.

[0045] When it is necessary to perform short-term work at other height positions, the height position of the work tool 6 can be temporarily changed by raising or lowering the holding tool 6.

[0046] Preferably, the first elastic element is a coil spring 27, one end of which is connected to the winding wheel 16. The coil spring 27 is used to drive the winding wheel 16 to rotate and reset. Preferably, the suspension rope 7 is a steel wire rope, which has high strength.

[0047] Figure 1 As shown, the main body 1 of the support includes a fixed frame 3 and a boom 5. One end of the boom 5 is hinged to the upper end of the fixed frame 3. The free end of the suspension rope 7 is arranged on the boom 5. The boom 5 swings up and down relative to the fixed frame 3 to change the height position of the free end of the suspension rope 7. A first locking mechanism is provided between the boom 5 and the fixed frame 3. When the boom 5 swings relative to the fixed frame 3 and the free end of the suspension rope 7 reaches the set height, the first locking mechanism is used to keep the boom 5 and the fixed frame 3 fixed and not rotated.

[0048] Preferably, the first locking mechanism is a gas spring 2. One end of the gas spring 2 is hinged to the boom 5, and the other end of the gas spring 2 is hinged to the fixed frame 3. The gas spring 2 is supported between the boom 5 and the fixed frame 3. When the boom 5 swings upward relative to the fixed frame 3 to increase the height of the free end of the hoisting rope 7, the gas spring 2 extends as the boom 5 swings upward. When the boom 5 swings downward relative to the fixed frame 3 to decrease the height of the free end of the hoisting rope 7, the gas spring 2 shortens as the boom 5 swings downward. Under the action of the gas spring 2, the boom 5 and the fixed frame 3 can maintain a fixed state, thus achieving the effect of "stopping at will".

[0049] Preferably, the gas spring 2 can be either a self-locking nitrogen gas spring 2 or an arbitrary stop nitrogen gas spring 2.

[0050] This patent allows the boom 5 and the fixed frame 3 to be rotatable. When long-term operation at different heights is required, the angle between the boom 5 and the fixed frame 3 can be adjusted by swinging it up or down. Then, the first locking mechanism keeps the boom 5 and the fixed frame 3 at the adjusted angle, thereby changing the height of the free end of the hoisting rope 7 on the boom 5. This allows the working tool 6 connected to the free end of the hoisting rope 7 to be at the required height. The balance bracket can be used to assist the operator in long-term operation at different heights, avoiding the need for the operator to constantly apply force to lift or pull the working tool 6 when changing to other heights for long-term operation. This makes it more versatile.

[0051] Figure 1 , Figure 2 As shown, the main body 1 of the support also includes a back frame 4, which is fixedly connected to the fixed frame 3. The back frame 4 is equipped with a carrying strap. By carrying and suspending the tool 6, the weight of the tool 6 is changed from being borne by the operator's hands to being borne by the operator's whole body, reducing labor intensity. Moreover, the operator can carry it at any time by carrying it on their back, and the usage scenarios are not limited, making it more flexible.

[0052] Figures 4-6 As shown, the fixed frame 3 includes a support rod 11 and a housing 13. The housing 13 is fixed to the lower end of the support rod 11, and the boom 5 is hinged to the upper end of the support rod 11. The upper end of the support rod 11 is fixed with a hinge frame 10 that is hinged to the boom 5. The housing 13 has a receiving cavity 41 for accommodating the winding wheel 16 and the coil spring 27. The winding wheel 16 is rotatably installed in the receiving cavity 41. The upper and lower ends of the back frame 4 are respectively connected to the support rod 11 and the housing 13. The support rod 11 is provided with a mounting frame 12, which is sleeved on the support rod 11 and fixed with bolts. The upper end of the back frame 4 is fixedly connected to the mounting frame 12, and the lower end of the gas spring 2 is hinged to the mounting frame 12.

[0053] Figure 3As shown, the hoisting rope 7 is arranged along the length of the support rod 11 and the boom 5. The support rod 11 and the boom 5 are provided with channels for the hoisting rope 7 to pass through. The boom 5 has an opening 8 at the end away from the hinge point for the free end of the hoisting rope 7 to extend out. The guide pulleys include a first guide pulley 15 disposed in the housing 13, a second guide pulley 14 disposed at the hinge point of the boom 5, and a third guide pulley 9 disposed at the end of the boom 5 away from the hinge point. The first guide pulley 15 guides the hoisting rope 7 extending from the winding wheel 16 from the lower end of the support rod 11 into the support rod 11. The second guide pulley 14 guides the hoisting rope 7 extending from the upper end of the support rod 11 into the boom 5. The third guide pulley 9 guides the hoisting rope 7 in the boom 5 to the opening 8, so that the hoisting rope 7 can extend out of the boom 5 from the opening 8.

[0054] Figures 5-19 As shown, a second locking mechanism is provided between the support body 1 and the winding wheel 16 for locking the rotation of the winding wheel 16. When it is necessary to adjust the height of the suspended work tool 6 by swinging the boom 5 up or down, the second locking mechanism locks the relative rotation between the winding wheel 16 and the housing 13, so that the winding wheel 16 stops winding and releasing the lifting rope 7. This allows the user to swing the boom 5 down by pulling down the lifting rope 7, making it convenient for the user to adjust the boom 5. Furthermore, in the locked state of the winding wheel 16, the upward or downward swing of the boom 5 will not cause the winding wheel 16 to suddenly wind or release the lifting rope 7 due to external force disrupting the balance, thus improving the stability and safety of the boom 5 adjustment process.

[0055] The second locking mechanism includes a second elastic element, a locking groove 23 disposed on the winding reel 16, and a locking member 18 movably disposed on the bracket body 1. The locking member 18 is engaged or disengaged from the corresponding locking groove 23 by movement. The second elastic element is used to drive the locking member 18 to move and reset. The locking member 18 is provided with a mating part, and the bracket body 1 is provided with a first part and a second part corresponding to the mating part. There is a height difference between the first part and the second part. The locking member 18 can rotate around a first axis on the bracket body 1 to switch between a locked position and an unlocked position.

[0056] Figures 12-19 As shown, when the locking member 18 is rotated to the unlocked position, the mating part is opposite to the first part, and the locking member 18 moves to the outside of the locking groove 23 so that the winding wheel 16 can rotate relative to the bracket body 1. When the locking member 18 is rotated to the locked position, the mating part is opposite to the second part, and the locking member 18 moves to be inserted into the locking groove 23 so that the relative rotation between the winding wheel 16 and the bracket body 1 is locked.

[0057] Figure 8 , Figure 9As shown, preferably, the first part is configured as a first slot 31, and the second part is configured as a second slot 33. The bottom of the first slot 31 and the bottom of the second slot 33 have a height difference. The mating part is configured as a plug 35 for inserting into the first slot 31 or the second slot 33. The plug 35 is inserted into the corresponding first slot 31 or second slot 33 to restrict the rotation of the locking member 18 relative to the bracket body 1. When the locking member 18 is moved to one side relative to the bracket body 1 by an external force, the plug 35 disengages from the first slot 31 or the second slot 33 to release the rotational locking of the locking member 18. At this time, the locking is complete. The locking member 18 can rotate relative to the bracket body 1 to change the position of the mating part, so that the mating part can change between the position opposite to the first slot 31 and the position opposite to the second slot 33. When the locking member 18 loses force, the second elastic member drives the locking member 18 to move and reset, so that the insert 35 is inserted into the opposite first slot 31 or second slot 33. The rotation of the locking member 18 is locked by the engagement of the insert 35 with the first slot 31 or the second slot 33, thereby avoiding the rotation of the mating part due to the operator accidentally touching the locking member 18, so that the locking member 18 can be more stably kept in the locked position or the unlocked position.

[0058] Figure 10 , Figure 11 As shown, the aforementioned locking member 18 is disposed on the housing 13. The locking member 18 includes a control button 34 and a locking pin 38 for engaging with the locking groove 23 on the take-up reel 16. The housing 13 has a through hole 42 connecting the interior and exterior. The locking pin 38 is movably inserted into the through hole 42. The inner end of the locking pin 38 is opposite to the take-up reel 16, and the outer end of the locking pin 38 is fixedly connected to the control button 34 outside the housing 13. The outer wall of the housing 13 has an outer groove 22 that connects to the outer end of the through hole 42. The groove opening of the outer groove 22... Opposite to the control button 34, the first slot 31 and the second slot 33 are disposed in the outer groove 22, and the bottom of the first slot 31 is higher than the bottom of the second slot 33. The insert 35 is disposed on the inner side of the control button 34. The insert 35 is inserted into the outer groove 22 and engages with the first slot 31 or the second slot 33. The second elastic member has a spring force that drives the locking member 18 to move into the housing 13. This spring force acts on the locking member 18, so that the insert 35 can be inserted into the corresponding first slot 31 or the second slot 33.

[0059] The locking pin 38 can move linearly along the first axis and can rotate around the first axis, with the center line of the locking pin 38 coinciding with the first axis.

[0060] The inner side of the housing 13 is provided with an inner groove 43 opposite to the take-up reel 16. The inner groove 43 is connected to the inner end of the through hole 42 away from the outer groove 22. That is, the through hole 42 connects the inner groove 43 and the outer groove 22. The inner end of the locking pin 38 extends out from the inner groove 43 and cooperates with the locking groove 23 on the take-up reel 16. The outer wall of the locking pin 38 is provided with a first step 39. The second elastic element is a return spring 24. The return spring 24 is sleeved on the locking pin 38. One end of the return spring 24 abuts against the inner wall of the inner groove 43, and the other end of the return spring 24 abuts against the first step 39. The return spring 24 has a spring force that pushes the locking pin 38 to move towards the take-up reel 16.

[0061] When the insert 35 is inserted into the second slot 33, the inner end of the locking pin 38 is inserted into the corresponding locking groove 23, restricting the rotation of the winding wheel 16 relative to the housing 13. Simultaneously, the insert 35 cooperates with the second slot 33 to restrict the rotation of the locking pin 38 and the control button 34 relative to the housing 13. When it is necessary to release the lock on the winding wheel 16, by grasping and pulling the external control button 34, the locking pin 38 moves outward and disengages from the locking groove 23. At the same time, the insert 35 moves outward and disengages from the second slot 33. At this time, the locking member 18 can rotate relative to the housing 13. Rotating the locking member 18 around the first axis on the housing 13 from the locked position to the unlocked position allows... When the insert 35 changes from its position opposite to the second slot 33 to its position opposite to the first slot 31, the control button 34 is released, and the control button 34 loses its force. The return spring 24 pushes the locking pin 38 inward, causing the locking pin 38 to move the control button 34 back to its original position. The insert 35 on the control button 34 is then inserted into the opposite first slot 31. Since the bottom of the first slot 31 is higher than the bottom of the second slot 33, the insert 35 is supported in the first slot 31, preventing the locking pin 38 from being inserted into the locking groove 23. At this time, the winding wheel 16 is in the unlocked state, and the winding wheel 16 can rotate relative to the housing 13 to wind and release the lifting rope 7.

[0062] Figure 12 , Figure 13 As shown, preferably, when the insert 35 is inserted into the first slot 31, the inner end of the locking pin 38 disengages from the locking groove 23 and is completely contained within the inner groove 43, so that the locking pin 38 will not collide with the operation of other components inside the housing 13.

[0063] The outer periphery of the control button 34 is provided with anti-slip texture.

[0064] The outer groove 22 is provided with several partitions with different heights. The partitions of different heights divide the internal space into a first slot 31 and a second slot 33. Two of the partitions serve as limiting partitions 30. The two limiting partitions 30 form a limiting area 32 for the insertion block 35 to move within. The limiting area 32 is provided with the first slot 31 and the second slot 33. During the movement of the control button 34 and the locking pin 38 relative to the housing 13, the insertion block 35 is always within the limiting area 32. The limiting area 32, in conjunction with the insertion block 35, limits the maximum angle of rotation of the locking member 18.

[0065] When the control button 34 is rotated in one direction to the position where the insert 35 abuts against the limiting partition 30 on one side of the limiting area 32, the insert 35 is opposite to the first slot 31. When the control button 34 is rotated in the opposite direction to the position where the insert 35 abuts against the limiting partition 30 on the other side of the limiting area 32, the insert 35 is opposite to the second slot 33, which is convenient for the user to operate.

[0066] Preferably, two limiting partitions 30 divide the outer perimeter of the outer groove 22 into two limiting zones 32. Each limiting zone 32 contains a first slot 31 and a second slot 33, which are set at a 90° angle. The control button 34 has two inserts 35 corresponding to the two limiting zones 32, respectively. The two inserts 35 are respectively housed in the two limiting zones 32. When the locking member 18 is rotated to the locked position, the two inserts 35 are opposite to the two second slots 33. When the locking member 18 is rotated to the unlocked position, the two inserts 35 are opposite to the two first slots 31. The two inserts 35 are positioned symmetrically on both sides of the control button 34. By setting two sets for cooperation, the rotational locking of the locking member 18 is more stable. A reinforcing block 36 is provided on one side of the insert 35 to increase strength.

[0067] The inner wall of the inner groove 43 is provided with a second step 44, and the side wall of the locking pin 38 is provided with an outer ring edge 40. When the control button 34 is pulled outward by force, the outer ring edge 40 can abut against the second step 44 to limit the outward movement of the control button 34 and the locking pin 38, thereby limiting the maximum displacement of the control button 34 and the locking pin 38, and thus preventing the insertion block 35 from leaving the limiting area 32.

[0068] The control button 34 has a central groove 37 on its inner side. The outer end of the locking pin 38 is inserted into the central groove 37. The outer end face of the locking pin 38 has a threaded hole. After the screw passes through the control button 34, it is threaded into the threaded hole to fix the control button 34 and the locking pin 38. The side wall of the outer end of the locking pin 38 has a cut surface. The central groove 37 has an anti-rotation surface that cooperates with the cut surface. When the outer end of the locking pin 38 is inserted into the central groove 37, the cut surface and the anti-rotation surface cooperate to restrict the relative rotation of the locking pin 38 and the control button 34, making the connection between the locking pin 38 and the control button 34 more stable.

[0069] Preferably, four locking slots 23 are provided, arranged in a circular array on the end face of the take-up reel 16 with the axis of the take-up reel 16 as the center. The locking member 18 is inserted into one of the locking slots 23 to lock the rotation of the take-up reel 16 and the support body 1. The number of locking slots 23 is not limited to four and can be other numbers. The locking member 18 moves along a first axis, which is parallel to the axis of the take-up reel 16.

[0070] Figure 7 As shown, the winding reel 16 includes a reel body 28 and two side covers 26. The reel body 28 has spring grooves 29 on both sides, and a spring 27 is installed within each spring groove 29. The two side covers 26 are respectively mounted on both sides of the reel body 28 and cover the spring grooves 29. The two side covers 26 and the outer circumferential surface of the reel body 28 combine to form a rope groove 21 for the lifting rope 7 to be wound. The side covers 26 are connected to the reel body 28 by screws.

[0071] A shaft 17 is installed inside the receiving cavity 41, and a take-up reel 16 is mounted on the shaft 17. The shaft 17 and the take-up reel 16 are rotatably connected by a bearing 25. A coil spring 27 is disposed between the shaft 17 and the take-up reel 16, and the other end of the coil spring 27 is connected to the shaft 17. The shaft 17 can be relatively fixed inside the housing 13.

[0072] The housing 13 includes a left half-shell 19 and a right half-shell 20. The left half-shell 19 and the right half-shell 20 are connected by screws to form an internal receiving cavity 41.

[0073] This patented structure is not limited to use for suspending work tools 6, but can also be used to suspend other objects.

[0074] The adjustable-angle balance bracket provided by this utility model has been described above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from its principle, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An angle-adjustable counterbalance support, comprising a support body, a winding wheel, a lifting rope and a first elastic member, the lifting rope is arranged on the support body, a fixed end of the lifting rope is connected to the winding wheel, a free end of the lifting rope is used for connecting a work tool to be hung, the winding wheel is rotatably arranged on the support body, the winding wheel can wind or release the lifting rope, the first elastic member is connected to the winding wheel, and the first elastic member is used for driving the winding wheel to wind the lifting rope, characterized in that, The support body comprises a fixed frame and a cantilever arm, one end of the cantilever arm is hinged to the upper end of the fixed frame, the free end of the lifting rope is arranged on the cantilever arm, the cantilever arm swings up and down relative to the fixed frame to change the height position of the free end of the lifting rope, a first locking mechanism is arranged between the cantilever arm and the fixed frame, when the cantilever arm swings relative to the fixed frame and the free end of the lifting rope reaches a set height, the first locking mechanism is used to keep the cantilever arm and the fixed frame fixed and not rotating.

2. The angle adjustable counterbalance support of claim 1, wherein, The second locking mechanism is arranged between the support body and the winding wheel for locking the rotation of the winding wheel.

3. The angle adjustable counterbalance support of claim 2, wherein, The second locking mechanism comprises a second elastic member, a locking slot arranged on the winding wheel, and a lock piece movably arranged on the support body, the lock piece is inserted into or separated from the opposite locking slot through movement, the second elastic member is used to drive the lock piece to move and reset, the lock piece is provided with a matching part, the support body is provided with a first part and a second part corresponding to the matching part, the first part and the second part have a height difference, the lock piece can rotate around the first axis on the support body to switch between the locking position and the unlocking position, When the lock piece rotates to the unlocking position, the matching part is opposite to the first part, the lock piece moves to the outside of the locking slot so that the winding wheel can rotate relative to the support body, When the lock piece rotates to the locking position, the matching part is opposite to the second part, the lock piece moves to be inserted into the locking slot so that the relative rotation between the winding wheel and the support body is locked.

4. The angle adjustable counterbalance support of claim 3, wherein, The locking slot is provided with four, the four locking slots are arranged in a ring array on the end face of the winding wheel with the axis of the winding wheel as the center, the lock piece is inserted into one of the locking slots to lock the rotation of the winding wheel and the support body.

5. The angle adjustable counterbalance support of claim 3, wherein, The first part is arranged as a first insertion slot, the second part is arranged as a second insertion slot, the slot bottom of the first insertion slot and the slot bottom of the second insertion slot have a height difference, the matching part is arranged as an insertion block for being inserted into the first insertion slot or the second insertion slot, the insertion block is inserted into the opposite first insertion slot or second insertion slot to limit the rotation of the lock piece relative to the support body, when the lock piece moves to one side relative to the support body under the action of an external force, the insertion block is separated from the first insertion slot or the second insertion slot, at this time, the lock piece can rotate relative to the support body to change the position of the matching part, when the lock piece is not under the action of the external force, the second elastic member drives the lock piece to move and reset, so that the insertion block is inserted into the opposite first insertion slot or second insertion slot.

6. The angle adjustable counterbalance support of claim 5, wherein, The fixed frame comprises a support rod and a housing fixed to the lower end of the support rod, the boom is hinged to the upper end of the support rod, the housing is provided with a containing cavity for containing the winding wheel and the first elastic member, the winding wheel is rotatably installed in the containing cavity, the first elastic member is a coil spring, one end of the coil spring is connected to the winding wheel, the locking member comprises a locking pin for plug-in cooperation with the locking slot and a control knob, the housing is provided with a through hole communicating the inside and the outside, the locking pin is movably arranged in the through hole, the inner end of the locking pin is opposite to the winding wheel, the outer end of the locking pin is fixedly connected with the control knob, the outer side of the housing is provided with an outer slot connected with one end of the through hole, the control knob is arranged outside the housing and opposite to the outer slot, the first slot and the second slot are arranged in the outer slot, the groove bottom of the first slot is higher than that of the second slot, the plug block is arranged on the inner side of the control knob and is inserted into the outer slot and cooperates with the first slot or the second slot.

7. The angle adjustable counterbalance support of claim 6, wherein, The inner side of the housing is provided with an inner slot opposite to the winding wheel, the inner slot is connected with the end of the through hole away from the outer slot, the outer side wall of the locking pin is provided with a first step, the second elastic member is a return spring, the return spring is sleeved on the locking pin, one end of the return spring abuts against the inner wall of the inner slot, the other end of the return spring abuts against the first step, the return spring has a elastic force for pushing the locking pin to move to one side of the winding wheel, when the plug block is plugged into the first slot, the inner end of the locking pin is separated from the locking slot and is completely contained in the inner slot.

8. The angle adjustable counterbalance support of claim 1, wherein, The support body is provided with a guide pulley, and the lifting rope is wound around the guide pulley.

9. The angle adjustable counterbalance support of claim 1, wherein, The first locking mechanism is a gas spring, one end of the gas spring is hinged to the boom, the other end of the gas spring is hinged to the fixed frame, and the gas spring is supported between the boom and the fixed frame.

10. The angle adjustable counterbalance support of claim 1, wherein, The support body further comprises a back frame fixedly connected to the fixed frame, and the back frame is provided with a carrying strap for carrying.

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