Jacking device

Abstract

The utility model belongs to the technical field of jacking devices, and particularly relates to a jacking device which comprises a fixing part and a lifting part, the fixing part comprises a base and a guide rod, the lifting part is arranged on the guide rod in a sliding mode, a lifting plate is arranged on the lifting part, a climbing mechanism is arranged on the guide rod, and an adjusting grip is rotationally arranged on the lifting part. The climbing mechanism and the guide rod can be driven to be in an inclined state by pressing the adjusting grip, at the moment, the lifting part can be pushed to move upwards along the guide rod by continuously pressing the adjusting grip, a locking mechanism is arranged on the lifting part, a fine adjustment piece is further movably arranged on the guide rod, one end of the fine adjustment piece abuts against the lifting part, and a fine adjustment switch is hinged to the other end of the fine adjustment piece. An adjusting rod is arranged on the inching switch, the adjusting rod can drive the locking mechanism to slightly incline downwards by pressing the inching switch so as to achieve fine adjustment of the lifting part, a descending control piece is arranged above the locking mechanism, the lifting part can be driven to quickly move downwards along the guide rod by pressing the descending control piece, and the jacking device can finely adjust the descending distance of an object.

Description

Technical Field

[0001] The utility model belongs to the technical field of jacking devices, in particular to a jacking device. Background Art

[0002] When doing indoor and outdoor decoration of buildings, it is often necessary to lift the work objects such as anti-theft doors and wall tiles to a certain height, and then fix and install the work objects. At present, there are various kinds of lifting devices on the market to help people fix the work objects during the work, so that people can install anti-theft doors, wall tiles and other items more conveniently and accurately. However, the lifting devices on the market currently have only one control button. When the user wants to adjust the lifting height of the object downward, he can only press the control button. Since there are lifted objects on the lifting device, when the user presses the control button, the lifted objects will drop rapidly under the weight of the objects. The user cannot fine-tune to the height to which the objects are desired to drop, and the rapid drop of the objects will affect the user's life safety. Therefore, it is necessary to provide a lifting device that can fine-tune the drop distance of the objects. Summary of the invention

[0003] The utility model aims to provide a lifting device with a simple structure and capable of finely adjusting the descending distance of an object.

[0004] The purpose of the utility model is achieved in this way:

[0005] A lifting device comprises a fixed part and a lifting part arranged on the fixed part, the fixed part comprises a base and a guide rod arranged on the base, the lifting part is slidably arranged on the guide rod, the lifting part is provided with a lifting plate, the guide rod is provided with a climbing mechanism, the lifting part is rotatably provided with an adjusting handle, the inner end of the adjusting handle abuts against the climbing mechanism, pressing the adjusting handle can drive the climbing mechanism and the guide rod to be in an inclined state, at this time continuing to press the adjusting handle can push the lifting part to move upward along the guide rod, the lifting part is provided with a locking mechanism engaged with the guide rod, the locking mechanism limits the lifting part from moving downward, and the guide rod is also movably provided with There is a fine-tuning plate, one end of which is in contact with the lifting part, and the other end of the fine-tuning plate is hingedly provided with a fine-tuning switch. The fine-tuning switch is provided with an adjusting rod, and the bottom end of the adjusting rod is in contact with the upper surface of the locking mechanism. Pressing the fine-tuning switch can drive the fine-tuning plate to be in an inclined state and engage with the guide rod. Continuing to press the fine-tuning switch causes the adjusting rod to drive the locking mechanism to tilt slightly downward to achieve fine-tuning of the lifting part. A descending control part is provided above the locking mechanism, and the bottom end of the descending control part is in contact with the upper surface of the locking mechanism. Pressing the descending control part can drive the locking mechanism and the guide rod to be in a vertical state. At this time, the lifting part moves downward rapidly along the guide rod.

[0006] Furthermore, the lifting part includes a lifting shell and a lifting block, the lifting block is arranged in the lifting shell and fixedly connected to the lifting shell, the lifting block is sleeved on the guide rod, the top of the lifting shell is provided with a control hole, the bottom end of the descent control member passes through the control hole and abuts against the upper surface of the locking mechanism, the top of the descent control member is exposed from the lifting shell, the top of the descent control member is provided with a pressing portion, and an abutment plate is extended and formed on the descent control member, and the abutment plate can abut against the inner wall of the lifting shell.

[0007] Furthermore, a spring installation space is formed in the lifting shell, the control hole passes through the spring installation space, the abutment plate is arranged in the spring installation space, a first return spring is arranged in the spring installation space, the first return spring is sleeved on the descending control member, and the two ends of the first return spring are respectively abutted against the spring installation space and the abutment plate.

[0008] Furthermore, a fixed handle is extended from the lifting shell, a handle opening is provided on the lifting shell below the fixed handle, an inner end of one end of the adjusting handle passes through the handle opening and is rotatably connected to the lifting block, a mounting hole is provided on the lifting shell, a connecting part is provided on the lifting block, a connecting hole is provided on the connecting part, and connecting rods are provided in the connecting hole and the mounting hole.

[0009] Furthermore, a fine-tuning opening is provided on the lifting shell, one end of the fine-tuning switch is arranged outside the lifting shell through the fine-tuning opening, and a mounting opening is also provided at the lower end of the lifting shell. The lifting plate is fixedly installed at the bottom of the lifting block, and one end of the lifting plate is exposed from the lifting shell through the mounting opening.

[0010] Furthermore, a second return spring is provided in the lifting shell, the second return spring is sleeved on the guide rod, and two ends of the second return spring are respectively in contact with the inner wall of the lifting shell and the upper surface of the fine-tuning sheet.

[0011] Furthermore, the climbing mechanism includes a control plate and a third return spring arranged between the control plate and the lifting block, the control plate and the third return spring are both mounted on the guide rod, the two ends of the third return spring are respectively abutted against the lower surface of the control plate and the lifting block, the inner end of the adjusting handle is abutted against the upper surface of the control plate, the adjusting handle is pressed so that the control plate is in an inclined state and engaged with the guide rod, and the lifting block moves upward.

[0012] Furthermore, a clamping platform is provided at the top of the lifting block, and the locking mechanism includes a locking plate and a clamping spring arranged between the locking plate and the lifting block, the locking plate and the clamping spring are both mounted on the guide rod, and the two ends of the clamping spring are respectively abutted against the lower surface of the locking plate and the lifting block, and the clamping spring pushes the locking plate to be in an inclined state and clamped with the guide rod to limit the lifting part from moving downward, and a clamping groove is provided on the clamping platform, and one end of the locking plate is extended to form an extension part, and the extension part is arranged in the clamping groove and can abut against the clamping platform.

[0013] Furthermore, a hinge plate is symmetrically formed at the other end of the fine-tuning sheet, the fine-tuning switch is arranged between the hinge plates, a hinge hole is provided on the hinge plate, a rotating hole is provided on the fine-tuning switch, and a rotating rod is provided in the rotating hole and the hinge hole.

[0014] Furthermore, a limit block is provided at the top end of the guide rod, the base is arranged at the bottom end of the guide rod, a placement space is formed on the base, and the lifting plate can be arranged in the placement space.

[0015] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

[0016] A lifting device comprises a fixed part and a lifting part arranged on the fixed part, the fixed part comprises a base and a guide rod arranged on the base, the lifting part is slidably arranged on the guide rod, the lifting part is provided with a lifting plate, the guide rod is provided with a climbing mechanism, the lifting part is rotatably provided with an adjusting handle, the inner end of the adjusting handle abuts against the climbing mechanism, pressing the adjusting handle can drive the climbing mechanism and the guide rod to be in an inclined state, at this time continuing to press the adjusting handle can push the lifting part to move upward along the guide rod, the lifting part is provided with a locking mechanism engaged with the guide rod, the locking mechanism limits the lifting part from moving downward, and the guide rod is also movably provided with There is a fine-tuning sheet, one end of which is in contact with the lifting part, and the other end of the fine-tuning sheet is hingedly provided with a fine-tuning switch, and an adjusting rod is provided on the fine-tuning switch, and the bottom end of the adjusting rod is in contact with the upper surface of the locking mechanism. Pressing the fine-tuning switch can drive the fine-tuning sheet to be in an inclined state and engage with the guide rod, and continuing to press the fine-tuning switch causes the adjusting rod to drive the locking mechanism to tilt slightly downward to achieve fine adjustment of the lifting part, and a descending control member is provided above the locking mechanism, and the bottom end of the descending control member is in contact with the upper surface of the locking mechanism, and pressing the descending control member can drive the locking mechanism and the guide rod to be in a vertical state, and at this time, the lifting part moves downward rapidly along the guide rod;Before using the lifter, the user first places the lifting plate on the lifting part under the object to be lifted. At this time, the user presses the adjusting handle. Since the adjusting handle is rotatably arranged on the lifting part and the inner end of the adjusting handle is in contact with the climbing mechanism, when the user presses the adjusting handle, the climbing mechanism and the guide rod are in an inclined state, and the climbing mechanism cannot move. At this time, after the user continues to press the adjusting handle, the adjusting handle will drive the lifting part to move upward along the guide rod, thereby causing the lifting plate on the lifting part to move upward together to lift the object. Since the locking mechanism on the lifting part is in an inclined state and is engaged with the guide rod, when the lifting part moves upward, it can The lifting device on the market can prevent the lifting part from falling to its original position. When the user wants to lower the lifting height of the object, the lifting height of the object can only be lowered by pressing the locking mechanism to release the clamping state of the locking mechanism and the guide rod. However, since the overall weight of the lifting part is heavy and there are objects placed on the lifting plate, the lifting part will drop rapidly after the clamping state of the locking mechanism and the guide rod is released. When the height that the user wants to adjust is lower, this kind of lifting device cannot meet the user's needs. A fine-tuning piece is movably provided on the guide rod of the utility model, one end of the fine-tuning piece is in contact with the lifting part, and the other end of the fine-tuning piece is hingedly provided with a fine-tuning switch. Since the bottom end of the adjusting rod on the fine-tuning switch abuts against the upper surface of the locking mechanism, when the user presses the fine-tuning switch, the end of the fine-tuning plate hinged with the fine-tuning switch will be lifted up, so that the fine-tuning plate will be tilted and engaged with the guide rod. At this time, the fine-tuning plate cannot continue to tilt. When the user continues to press the adjusting plate, the adjusting rod will push the locking mechanism downward to tilt slightly, so as to achieve fine adjustment of the height of the object being lowered. The operation is simple, fast and convenient. Since a descending control member is provided above the locking mechanism, the bottom end of the descending control member abuts against the upper surface of the locking mechanism, and when the object is installed and the lifting part is to be lowered to the initial position, the user can Press the top of the descending control member to move the descending control member downward, and then drive the locking mechanism and the guide rod to be in a vertical state, thereby releasing the clamping state of the locking mechanism and the guide rod. At this time, the lifting part can quickly move downward and reset to the initial position due to its own weight and the downward pressure applied by the user to the lifting part through the descending control member. The descending control member is arranged directly above the locking mechanism and far away from the fine-tuning switch, which can help users distinguish between the descending control member and the fine-tuning switch, so that users can correctly select the descending control member or the fine-tuning switch when they want to fine-tune the lifting part or descend quickly, which is beneficial for users to use the lifting device. ; BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a stereogram of the utility model.

[0018] Figure 2 It is a stereogram of the utility model.

[0019] Figure 3 yes Figure 2A partial enlarged view of point A in the middle.

[0020] Figure 4 It is an exploded view of the utility model.

[0021] Figure 5 It is a three-dimensional diagram of the lifting shell of the utility model.

[0022] Figure 6 It is a three-dimensional diagram of the lifting shell of the utility model.

[0023] Figure 7 It is an exploded view of the guide rod and the lifting block of the utility model.

[0024] Figure 8 It is a structural schematic diagram of the lifting block, the climbing mechanism and the locking mechanism of the utility model.

[0025] Fig. 9 It is an exploded view of the lifting block and the locking plate of the utility model.

[0026] Fig.10 It is an exploded view of the locking plate, the fine-tuning plate and the descending control part of the utility model.

[0027] Fig.11 It is an exploded view of the fine-tuning sheet and the fine-tuning switch of the utility model.

[0028] Fig.12 It is a structural schematic diagram of the lifting block, the control plate and the adjusting handle of the utility model.

[0029] The meaning of the symbols in the figure:

[0030] 1-lifting part; 2-base; 3-guide rod; 4-lifting plate; 5-adjusting handle; 6-fine-tuning plate;

[0031] 7-fine-tuning switch; 8-adjusting rod; 9-lowering control member; 10-lifting housing; 11-lifting block;

[0032] 12-control hole; 13-pressing portion; 14-contact plate; 15-spring installation space;

[0033] 16-first return spring; 17-fixed grip; 18-handle opening; 19-mounting hole; 20-connecting part;

[0034] 21-connecting hole; 22-connecting rod; 23-fine-tuning port; 24-installation port; 25-second return spring;

[0035] 26-control plate; 27-third return spring; 28-clamping platform; 29-locking plate; 30-clamping spring;

[0036] 31-clip groove; 32-extension portion; 33-hinge plate; 34-hinge hole; 35-rotation hole;

[0037] 36 - rotating rod; 37 - limiting block; 38 - placement space. DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with specific embodiments:

[0039] A lifting device comprises a fixed part and a lifting part 1 arranged on the fixed part, the fixed part comprises a base 2 and a guide rod 3 arranged on the base 2, the lifting part 1 is slidably arranged on the guide rod 3, the lifting part 1 is provided with a lifting plate 4, the guide rod 3 is provided with a climbing mechanism, the lifting part 1 is rotatably provided with an adjusting handle 5, the inner end of the adjusting handle 5 abuts against the climbing mechanism, pressing the adjusting handle 5 can drive the climbing mechanism and the guide rod 3 to be in an inclined state, at this time continuing to press the adjusting handle 5 can push the lifting part 1 to move upward along the guide rod 3, the lifting part 1 is provided with a locking mechanism engaged with the guide rod 3, the locking mechanism limits the lifting part 1 from moving downward, and the guide rod 3 is also movable A fine-tuning sheet 6 is provided, one end of which is in contact with the lifting part 1, and a fine-tuning switch 7 is hingedly provided on the other end of the fine-tuning sheet 6. An adjusting rod 8 is provided on the fine-tuning switch 7, and the bottom end of the adjusting rod 8 is in contact with the upper surface of the locking mechanism. Pressing the fine-tuning switch 7 can drive the fine-tuning sheet 6 to be in an inclined state and engage with the guide rod 3. Continuing to press the fine-tuning switch 7 makes the adjusting rod 8 drive the locking mechanism to tilt slightly downward, thereby realizing the fine adjustment of the lifting part 1. A descending control member 9 is provided above the locking mechanism, and the bottom end of the descending control member 9 is in contact with the upper surface of the locking mechanism. Pressing the descending control member 9 can drive the locking mechanism and the guide rod 3 to be in a vertical state. At this time, the lifting part 1 moves downward rapidly along the guide rod 3.Before using the lifter, the user first places the lifting plate 4 on the lifting part 1 under the object to be lifted. At this time, the user presses the adjusting handle 5. Since the adjusting handle 5 is rotatably arranged on the lifting part 1 and the inner end of the adjusting handle 5 is in contact with the climbing mechanism, when the user presses the adjusting handle 5, the climbing mechanism and the guide rod 3 are in an inclined state, and the climbing mechanism cannot move. At this time, after the user continues to press the adjusting handle 5, the adjusting handle 5 will drive the lifting part 1 to move upward along the guide rod 3, so that the lifting plate 4 on the lifting part 1 moves upward together to lift the object. Since the locking mechanism on the lifting part 1 is in an inclined state and is engaged with the guide rod 3, when the lifting part 1 moves upward After the lifting plate 4 is lifted, the lifting unit 1 can be prevented from falling to its original position. When the user wants to lower the lifting height of the object, the lifting device currently on the market can only lower the lifting height of the object by pressing the locking mechanism to release the clamping state of the locking mechanism and the guide rod 3. However, since the overall weight of the lifting unit 1 is heavy and there are objects on the lifting plate 4, the lifting unit 1 will drop quickly after the clamping state of the locking mechanism and the guide rod 3 is released. When the user wants to adjust the height to a lower level, this type of lifting device cannot meet the user's needs. A fine-tuning piece 6 is movably provided on the guide rod 3 of the utility model. One end of the fine-tuning piece 6 is abutted against the lifting unit 1, and the other end of the fine-tuning piece 6 is hingedly provided with a fine-tuning switch 7 , since the bottom end of the adjusting rod 8 on the fine-tuning switch 7 abuts against the upper surface of the locking mechanism, when the user presses the fine-tuning switch 7, the end of the fine-tuning piece 6 hinged to the fine-tuning switch 7 will be lifted up to make the fine-tuning piece 6 tilt and enter a clamping state with the guide rod 3. At this time, the fine-tuning piece 6 cannot continue to tilt. When the user continues to press the adjusting piece, the adjusting rod 8 will push the locking mechanism downward to tilt slightly downward, so as to achieve fine adjustment of the height of the object being lowered. The operation is simple, fast and convenient. Since a descending control member 9 is provided above the locking mechanism, the bottom end of the descending control member 9 abuts against the upper surface of the locking mechanism, and when the object is installed and the lifting part 1 is desired to be lowered to the initial position, the user can press Press the top of the descending control member 9, so that the descending control member 9 moves downward and then drives the locking mechanism and the guide rod 3 to be in a vertical state, thereby releasing the clamping state between the locking mechanism and the guide rod 3. At this time, the lifting part 1 can quickly move downward and reset to the initial position due to its own weight and the downward pressure applied by the user to the lifting part 1 through the descending control member 9. The descending control member 9 is arranged directly above the locking mechanism and is far away from the fine-tuning switch 7, which can help the user to distinguish between the descending control member 9 and the fine-tuning switch 7, so that the user can correctly select the descending control member 9 or the fine-tuning switch 7 when the user wants to fine-tune the lifting part 1 or quickly descend, which is conducive to the user using the lifting device. ;

[0040] Preferably, the lifting part 1 includes a lifting shell 10 and a lifting block 11, the lifting block 11 is arranged in the lifting shell 10 and fixedly connected to the lifting shell 10, the lifting block 11 is sleeved on the guide rod 3, the top of the lifting shell 10 is provided with a control hole 12, the bottom end of the descent control member 9 passes through the control hole 12 and abuts against the upper surface of the locking mechanism, the top of the descent control member 9 is exposed from the lifting shell 10, the top of the descent control member 9 is provided with a pressing portion 13, the descent control member 9 is extended and formed with an abutment plate 14, and the abutment plate 14 can abut against the inner wall of the lifting shell 10; the lifting block 11 is arranged in the lifting shell 10 and fixedly connected to the lifting shell 10, and when the lifting block 11 moves upward along the guide rod 3, it can smoothly drive the lifting shell 1 0 moves upward, and there is a control hole 12 at the top of the lifting shell 10 so that the bottom end of the descending control member 9 can smoothly pass through the control hole 12 and abut against the upper surface of the locking mechanism, so that the user can smoothly release the locking mechanism and the guide rod 3 by pressing the descending control member 9, so that the lifting block 11 can be smoothly reset to the initial position, and the pressing part 13 at the top of the descending control member 9 is exposed from the lifting shell 10, and the user presses the pressing part 13 to drive the descending control member 9 to move downward, which is more convenient and labor-saving, and the abutting plate 14 extended from the descending control member 9 abuts against the inner wall of the lifting shell 10, which can effectively prevent the descending control member 9 from escaping from the control hole 12, so that the user cannot control the rapid descent of the lifting block 11 by pressing the descending control member 9.

[0041] Preferably, a spring installation space 15 is formed in the lifting shell 10, the control hole 12 passes through the spring installation space 15, the abutment plate 14 is arranged in the spring installation space 15, and a first return spring 16 is provided in the spring installation space 15, the first return spring 16 is sleeved on the descending control member 9, and the two ends of the first return spring 16 are respectively abutted against the spring installation space 15 and the abutment plate 14; when the user presses the descending control member 9 to move downward, the first return spring 16 will enter a compressed state, and when the lifting block 11 descends to the initial position and releases the descending control member 9, the compressed first return spring 16 will push the descending control member 9 to move upward, thereby resetting the descending control member 9, so that the user can also control the lifting block 11 to descend to the initial position by pressing the descending control member 9 next time.

[0042] Preferably, a fixed handle 17 is extended and formed on the lifting shell 10, and a handle opening 18 is opened on the lifting shell 10 below the fixed handle 17. The inner end of one end of the adjusting handle 5 passes through the handle opening 18 and is rotatably connected to the lifting block 11. A mounting hole 19 is opened on the lifting shell 10, and a connecting portion 20 is provided on the lifting block 11. A connecting hole 21 is opened on the connecting portion 20, and a connecting rod 22 is provided in the connecting hole 21 and the mounting hole 19; the setting of the handle opening 18 enables the adjusting handle 5 to smoothly enter the lifting shell 10 and be rotatably connected to the lifting block 11, and the fixed handle 17 extended and formed on the lifting shell 10 makes it easier for the user to press the adjusting handle 5. The lifting shell 10 and the lifting block 11 are fixedly installed together through the connecting hole 21 and the connecting rod 22 in the mounting hole 19, so that the installation of the lifting shell 10 and the lifting block 11 is more stable and firm, and the lifting block 11 can smoothly drive the lifting shell 10 to move upward after moving upward along the guide rod 3.

[0043] Preferably, a fine-tuning opening 23 is provided on the lifting shell 10, one end of the fine-tuning switch 7 passes through the fine-tuning opening 23 and is arranged outside the lifting shell 10, and a mounting opening 24 is also provided at the lower end of the lifting shell 10, and the lifting plate 4 is fixedly installed at the bottom of the lifting block 11, and one end of the lifting plate 4 passes through the mounting opening 24 and is exposed from the lifting shell 10; the setting of the fine-tuning opening 23 on the lifting shell 10 enables one end of the fine-tuning switch 7 to be smoothly exposed outside the lifting shell 10, so that the user can smoothly fine-tune the lowering height of the object by pressing the fine-tuning switch 7, and one end of the lifting plate 4 passes through the mounting opening 24 on the lifting shell 10 and is exposed from the lifting shell 10, so that the lifting plate 4 can be smoothly placed under the object to lift the object.

[0044] Preferably, a second return spring 25 is provided in the lifting shell 10, and the second return spring 25 is sleeved on the guide rod 3, and the two ends of the second return spring 25 are respectively abutted against the inner wall of the lifting shell 10 and the upper surface of the fine-tuning plate 6; when the user presses the fine-tuning switch 7, the fine-tuning plate 6 will tilt upward until it is engaged with the guide rod 3. At this time, the second return spring 25 is in a compressed state. When the user releases his hand, the second return spring 25 will automatically push the fine-tuning plate 6 to reset, so that the user can continuously press the fine-tuning switch 7 for fine-tuning, thereby avoiding the situation where the fine-tuning plate 6 cannot be automatically reset and the user needs to manually reset it.

[0045] Preferably, the climbing mechanism includes a control plate 26 and a third return spring 27 arranged between the control plate 26 and the lifting block 11, the control plate 26 and the third return spring 27 are both sleeved on the guide rod 3, the two ends of the third return spring 27 are respectively abutted against the lower surface of the control plate 26 and the lifting block 11, the inner end of the adjusting handle 5 is abutted against the upper surface of the control plate 26, pressing the adjusting handle 5 makes the control plate 26 be in an inclined state and snap-fit ​​with the guide rod 3, and the lifting block 11 moves upward; when the user presses the adjusting handle 5, the control plate 26 will be in an inclined state and snap-fit ​​with the guide rod 3, and the lifting block 11 will move upward; when the user presses the adjusting handle 5, the control plate 26 will be in an inclined state and snap-fit ​​with the guide rod 3, at this time the third return spring 27 will be in a compressed state, and when the user releases the adjusting handle 5, the compressed third return spring 27 will push the control plate 26 to reset, so that the user can continuously adjust the handle 5 to lift the object, without the user manually resetting the control plate 26, thereby reducing unnecessary trouble for the user.

[0046] Preferably, a clamping platform 28 is provided at the top of the lifting block 11, and the locking mechanism includes a locking piece 29 and a clamping spring 30 arranged between the locking piece 29 and the lifting block 11, the locking piece 29 and the clamping spring 30 are both sleeved on the guide rod 3, and the two ends of the clamping spring 30 are respectively in contact with the lower surface of the locking piece 29 and the lifting block 11, and the clamping spring 30 pushes the locking piece 29 to be in an inclined state and clamped with the guide rod 3 to limit the lifting part 1 from moving downward, and a clamping groove 31 is provided on the clamping platform 28, and one end of the locking piece 29 is extended to form an extension part 32, and the extension part 32 is arranged in the clamping groove 31 and can be in contact with the clamping platform 28; when the user presses the fine-tuning switch 7 to make the locking piece 29 slightly When the user releases the fine-tuning switch 7, the compressed clamping spring 30 will push the locking piece 29 to reset. When the user presses the fine-tuning switch 7 next time, the height of the object can still be fine-tuned. When the user presses the descending control part 9 to release the locking piece 29 from the guide rod 3, the clamping spring 30 will be in a compressed state, and the lifting block 11 will descend to the initial position. When the user releases the descending control part 9, the compressed clamping spring 30 will push the locking piece 29 to reset to its original position. When the user uses the lifter to lift the object again, the lifting block 11 can move upward but cannot move downward, so that the lifter can be used smoothly.

[0047] Preferably, a hinge plate 33 is symmetrically formed at the other end of the fine-tuning plate 6, the fine-tuning switch 7 is arranged between the hinge plates 33, a hinge hole 34 is opened on the hinge plate 33, a rotating hole 35 is opened on the fine-tuning switch 7, and a rotating rod 36 is arranged in the rotating hole 35 and the hinge hole 34; the fine-tuning switch 7 is hinged to the other end of the fine-tuning plate 6 through the hinge hole 34 and the rotating rod 36 in the rotating hole 35, so that the fine-tuning switch 7 and the fine-tuning plate 6 are hinged more stably and firmly, and the fine-tuning switch 7 is arranged between the symmetrical hinge plates 33 on the fine-tuning plate 6, which can prevent the fine-tuning switch 7 from moving arbitrarily on the fine-tuning plate 6.

[0048] Preferably, a limit block 37 is provided at the top end of the guide rod 3, the base 2 is arranged at the bottom end of the guide rod 3, a placement space 38 is formed on the base 2, and the lifting plate 4 can be arranged in the placement space 38; when the lifting part 1 moves upward along the guide rod 3 for a certain distance, the top end of the lifting part 1 will abut against the lower surface of the upper limit block 37 on the guide rod 3, thereby preventing the lifting part 1 from detaching from the guide rod 3. When the lifting block 11 descends to the initial position, the lifting plate 4 on the lifting block 11 can enter the placement space 38 of the base 2. When facing objects close to the ground, such as tiles, anti-theft doors and other objects, the lifting plate 4 can also be placed on its lower surface to lift them.

[0049] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lifting device, comprising a fixing portion and a lifting portion (1) arranged on the fixing portion, characterized in that: The fixing part comprises a base (2) and a guide rod (3) arranged on the base (2); the lifting part (1) is slidably arranged on the guide rod (3); a lifting plate (4) is arranged on the lifting part (1); a climbing mechanism is arranged on the guide rod (3); an adjusting handle (5) is rotatably arranged on the lifting part (1); the inner end of the adjusting handle (5) abuts against the climbing mechanism; pressing the adjusting handle (5) can drive the climbing mechanism and the guide rod (3) to be in an inclined state; at this time, continuing to press the adjusting handle (5) can push the lifting part (1) to move upward along the guide rod (3); a locking mechanism is arranged on the lifting part (1) and is engaged with the guide rod (3); the locking mechanism limits the lifting part (1) from moving downward; a fine-tuning sheet (6) is also movably arranged on the guide rod (3); the fine-tuning sheet (6) One end of the fine-tuning sheet (6) is in contact with the lifting part (1), and the other end of the fine-tuning sheet (6) is hingedly provided with a fine-tuning switch (7). The fine-tuning switch (7) is provided with an adjusting rod (8). The bottom end of the adjusting rod (8) is in contact with the upper surface of the locking mechanism. Pressing the fine-tuning switch (7) can drive the fine-tuning sheet (6) to be in an inclined state and to be engaged with the guide rod (3). Continuing to press the fine-tuning switch (7) causes the adjusting rod (8) to drive the locking mechanism to tilt slightly downward, thereby achieving fine adjustment of the lifting part (1). A descending control member (9) is provided above the locking mechanism. The bottom end of the descending control member (9) is in contact with the upper surface of the locking mechanism. Pressing the descending control member (9) can drive the locking mechanism and the guide rod (3) to be in a vertical state. At this time, the lifting part (1) moves downward rapidly along the guide rod (3).

2. A lifting device according to claim 1, characterized in that: The lifting part (1) comprises a lifting shell (10) and a lifting block (11). The lifting block (11) is arranged in the lifting shell (10) and is fixedly connected to the lifting shell (10). The lifting block (11) is sleeved on the guide rod (3). The top of the lifting shell (10) is provided with a control hole (12). The bottom end of the descending control member (9) passes through the control hole (12) and abuts against the upper surface of the locking mechanism. The top of the descending control member (9) is exposed from the lifting shell (10). The top of the descending control member (9) is provided with a pressing portion (13). An abutting plate (14) is extended and formed on the descending control member (9). The abutting plate (14) can abut against the inner wall of the lifting shell (10).

3. A lifting device according to claim 2, characterized in that: A spring installation space (15) is formed in the lifting shell (10), the control hole (12) passes through the spring installation space (15), the abutment plate (14) is arranged in the spring installation space (15), a first return spring (16) is arranged in the spring installation space (15), the first return spring (16) is sleeved on the descending control member (9), and two ends of the first return spring (16) are respectively in contact with the spring installation space (15) and the abutment plate (14).

4. A lifting device according to claim 2, characterized in that: A fixed handle (17) is extended and formed on the lifting shell (10); a handle opening (18) is provided on the lifting shell (10) below the fixed handle (17); an inner end of one end of the adjustment handle (5) passes through the handle opening (18) and is rotatably connected to the lifting block (11); a mounting hole (19) is provided on the lifting shell (10); a connecting portion (20) is provided on the lifting block (11); a connecting hole (21) is provided on the connecting portion (20); and a connecting rod (22) is provided in the connecting hole (21) and the mounting hole (19).

5. A lifting device according to any one of claims 2 to 4, characterized in that: The lifting shell (10) is provided with a fine-adjustment opening (23), one end of the fine-adjustment switch (7) passes through the fine-adjustment opening (23) and is arranged outside the lifting shell (10), and the lower end of the lifting shell (10) is also provided with a mounting opening (24), the lifting plate (4) is fixedly mounted on the bottom of the lifting block (11), and one end of the lifting plate (4) passes through the mounting opening (24) and is exposed from the lifting shell (10).

6. A lifting device according to any one of claims 2 to 4, characterized in that: A second return spring (25) is arranged inside the lifting shell (10), and the second return spring (25) is sleeved on the guide rod (3). The two ends of the second return spring (25) are respectively in contact with the inner wall of the lifting shell (10) and the upper surface of the fine-tuning plate (6).

7. A lifting device according to any one of claims 2 to 4, characterized in that: The climbing mechanism comprises a control plate (26) and a third return spring (27) arranged between the control plate (26) and the lifting block (11); the control plate (26) and the third return spring (27) are both sleeved on the guide rod (3); the two ends of the third return spring (27) are respectively in contact with the lower surface of the control plate (26) and the lifting block (11); the inner end of the adjustment handle (5) is in contact with the upper surface of the control plate (26); the adjustment handle (5) is pressed to make the control plate (26) in an inclined state and clamped with the guide rod (3), and the lifting block (11) moves upward.

8. A lifting device according to any one of claims 2 to 4, characterized in that: A clamping platform (28) is provided at the top of the lifting block (11). The locking mechanism comprises a locking plate (29) and a clamping spring (30) arranged between the locking plate (29) and the lifting block (11). The locking plate (29) and the clamping spring (30) are both sleeved on the guide rod (3). The two ends of the clamping spring (30) are respectively in contact with the lower surface of the locking plate (29) and the lifting block (11). The clamping spring (30) pushes the locking plate (29) to be in an inclined state and clamped with the guide rod (3), thereby limiting the lifting part (1) from moving downward. A clamping groove (31) is provided on the clamping platform (28). One end of the locking plate (29) is extended to form an extension portion (32). The extension portion (32) is arranged in the clamping groove (31) and can be in contact with the clamping platform (28).

9. A lifting device according to any one of claims 1 to 4, characterized in that: The other end of the fine-tuning sheet (6) is symmetrically formed with a hinge plate (33), the fine-tuning switch (7) is arranged between the hinge plates (33), the hinge plate (33) is provided with a hinge hole (34), the fine-tuning switch (7) is provided with a rotation hole (35), and a rotation rod (36) is arranged in the rotation hole (35) and the hinge hole (34).

10. A lifting device according to any one of claims 1 to 4, characterized in that: A limit block (37) is provided at the top end of the guide rod (3), the base (2) is arranged at the bottom end of the guide rod (3), a placement space (38) is formed on the base (2), and the lifting plate (4) can be arranged in the placement space (38).

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