Cam type lifting platform

Abstract

The utility model relates to a cam type lifting platform which comprises a base, a driving mechanism is arranged on the base, one part of the driving mechanism is connected with one part of a transmission mechanism, the other part of the transmission mechanism is connected with a shear fork mechanism, and a kinematic pair is transmitted to the shear fork mechanism through the driving mechanism. The scissor fork mechanism moves in the vertical direction so as to achieve ascending or descending of the platform. The cam type lifting translation platform is further provided with a liquid level oil cylinder, when the lifting platform descends, the buffering effect is achieved, damage to parts due to the fact that the lifting platform withdraws too fast is avoided, and the service life of the lifting platform is prolonged. By arranging the detection assembly, when the sensor of the detection assembly detects that the lifting platform does not abut against the belt, the lifting platform can be locked immediately to prevent safety accidents caused by continuous ascending or descending.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, in particular to a cam type lifting platform. Background Art

[0002] A lifting platform is a lifting machine that transports people or objects vertically. The original lifting platform used basic power methods such as human power, animal power and water power to lift weights. With the advancement of technology, lifting platforms have also been designed and produced in a diversified manner. The free lifting characteristics of lifting platforms have been widely used in municipal maintenance, cargo transportation at docks and logistics centers, building decoration, etc. It can move freely after installing automobile chassis, battery car chassis, etc., and the working height space has also changed. It has the advantages of light weight, self-propelled, electric start, self-supporting legs, simple operation, large working surface, and the ability to cross obstacles for high-altitude operations, and 360-degree free rotation. However, there are some hidden dangers in the application of traditional lifting devices:

[0003] (1) When the platform is lifted, the lifting process cannot remain stable throughout the entire process, posing a safety hazard.

[0004] (2) When the lifting platform is lifted, there is a lack of safe support during the use of the equipment, and there is a risk of the equipment accidentally loosening and falling.

[0005] (3) When the lifting platform descends, the lack of buffer components can easily cause invisible damage to the equipment and affect its service life. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a cam-type lifting platform to solve one or more problems in the prior art.

[0007] To achieve the above purpose, the technical solution of the utility model is as follows:

[0008] A cam-type lifting platform comprises a base, on which a driving mechanism is arranged, a part of the driving mechanism is connected to a part of the transmission mechanism, and another part of the transmission mechanism is connected to a scissor-type mechanism. The kinematic pair is transmitted to the scissor-type mechanism through the driving mechanism, and the scissor-type mechanism moves in a vertical direction to realize the ascent or descent of the platform.

[0009] Furthermore, the driving mechanism includes a motor and a first shaft, a first recess is arranged in the motor, and a first protrusion is also arranged on the surface of the first shaft; the transmission mechanism includes a belt and a first sleeve, a second recess is arranged on the inner side of the first sleeve; the first protrusion is engaged with the first recess and the second recess so that the first sleeve is rotatably connected to the first shaft.

[0010] Furthermore, a third recessed portion is provided on the surface of the first sleeve, a third hole is provided in the third recessed portion, the first sleeve also includes a first clamping plate, the first clamping plate includes a fourth hole, one end of the belt is provided between the third recessed portion and the first clamping plate, and the third recessed portion is fixedly connected to the first clamping plate.

[0011] Furthermore, the other end of the belt is matched with a locking assembly, and the locking assembly includes a first rod, a second clamping plate, a third clamping plate and a second shaft; the second shaft is fixedly connected to the second clamping plate; the belt is matched with the second shaft and is arranged between the second clamping plate and the third clamping plate; the third clamping plate is symmetrically arranged on both sides of the second clamping plate, and the second clamping plate is fixedly connected to the third clamping plate.

[0012] Furthermore, the scissors mechanism includes a pair of scissors arms, which include a first arm and a second arm. The first arm and the second arm are rotatably cross-arranged with each other, and adjacent scissors arms are connected by a third arm. A part of each scissors arm is connected to the base, and another part of each scissors arm is connected to the platform; the third shaft is fixedly connected to the first arm.

[0013] Furthermore, the scissors-fork mechanism also includes a pull rod and a cam plate, the cam plate is arranged on a portion of the scissors-fork arm, the pull rod is surrounded by the belt and is movably arranged on the cam plate; the cam plate includes a first arc and a second arc, and the second arc is arranged lower than the first arc.

[0014] Furthermore, the pull rod surface is provided with a fourth recessed portion for cooperating with the belt; the pull rod is matched with one end of the conversion portion, and the other end of the conversion portion is respectively connected to the second sleeve and the third sleeve, and the second sleeve and the third sleeve are respectively matched with the side of the first arm and the cam plate.

[0015] Furthermore, a first plate is also provided on the third shaft, the first plate is matched with the third shaft, and the first plate is respectively connected to the first sleeve and the fourth shaft; one end of the liquid level cylinder is rotatably matched with the first plate, and the other end is rotatably provided on the base; one end of the first rod is fixedly connected to the second clamping plate, and the other end is fixedly connected to the fourth shaft.

[0016] Furthermore, the base also includes a detection component, which includes a suspension and a sensor, one end of the sensor is fixed to the suspension, and the other end abuts against the belt; the base is also provided with a limiting slider and a slideway; the fifth axis is rotatably arranged on the base.

[0017] Furthermore, a roller is provided on the base, and the roller can be slidably matched with the slideway. The roller is provided with a second protrusion at one end close to the limit slider, and the second protrusion is provided between the limit sliders to limit the movement of the first arm on the base; the first arm and the second arm of the upper layer are fixedly connected to the platform at one end away from the base.

[0018] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0019] (1) By setting up a liquid level cylinder, when the lifting platform descends, it plays a buffering role, avoiding damage to parts caused by the lifting platform being retracted too quickly, and increasing the service life of the lifting platform.

[0020] (ii) By setting the cam plate, when the lifting platform is lifted, the pull rod is stuck in the second arc of the cam plate, which makes it difficult to slide, thereby improving the overall stability of the lifting platform.

[0021] (3) By setting up a detection component, when the sensor of the detection component detects that it is not in contact with the belt, the lifting platform will immediately lock to prevent further rising or falling and causing safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural schematic diagram of a cam-type lifting platform according to an embodiment of the utility model is shown.

[0023] Figure 2 A structural schematic diagram of a first plate of a cam-type lifting platform according to an embodiment of the utility model is shown.

[0024] Figure 3 A structural schematic diagram of a first arm of a cam-type lifting platform according to an embodiment of the utility model is shown.

[0025] Figure 4 A schematic structural diagram of a first sleeve of a cam-type lifting platform in an embodiment of the utility model is shown.

[0026] Figure 5 A schematic structural diagram of a first axis of a cam-type lifting platform according to an embodiment of the utility model is shown.

[0027] Figure 6 A schematic structural diagram of a motor of a cam-type lifting platform according to an embodiment of the utility model is shown.

[0028] Figure 7 A schematic diagram of the fourth axis structure of a cam-type lifting platform according to an embodiment of the utility model is shown.

[0029] Figure 8 A structural schematic diagram of a cam of a cam-type lifting platform according to an embodiment of the utility model is shown.

[0030] Fig. 9 A schematic structural diagram of a pull rod of a cam-type lifting platform according to an embodiment of the utility model is shown.

[0031] Fig.10 A schematic structural diagram of a second clamping plate of a cam-type lifting platform in an embodiment of the utility model is shown.

[0032] Fig.11 A schematic structural diagram of a third clamping plate of a cam-type lifting platform according to an embodiment of the utility model is shown.

[0033] Fig.12 A partial enlargement of a cam-type lifting platform according to an embodiment of the utility model is shown. Figure Ⅰ .

[0034] Fig.13 A partial enlargement of a cam-type lifting platform according to an embodiment of the utility model is shown. Figure II .

[0035] Fig.14 A partial enlargement of a cam-type lifting platform according to an embodiment of the utility model is shown. Figure III .

[0036] Fig.15 A partial enlargement of a cam-type lifting platform according to an embodiment of the utility model is shown. Figure IV .

[0037] Markings in the accompanying drawings: 1, base; 2, driving mechanism; 200, motor; 2001, first hole; 20011, first recessed portion; 201, first shaft; 2011, first protruding portion; 3, transmission mechanism; 301, belt; 302, first sleeve; 3021, second hole; 3022, second recessed portion; 3023, third recessed portion; 30231, third hole; 3024, first clamping plate; 30241, fourth hole; 4, scissor mechanism; 401, first arm; 4011, eighth hole; 4012, ninth hole; 402, second arm; 403, cam plate; 4031, first arc; 4032, second arc; 404, pull rod; 4041, fourth recessed portion; 404 2. The tenth hole; 405. The third arm; 5. The detection component; 501. The suspension; 5011. The fourteenth hole; 502. The sensor; 6. The locking component; 601. The first rod; 602. The second clamping plate; 6021. The fifth hole; 6022. The sixth hole; 603. The third clamping plate; 6031. The seventh hole; 604. The second axis; 7. The third axis; 8. The conversion part; 9. The second sleeve; 10. The third sleeve; 11. The first plate; 1101. The eleventh hole; 1102. The twelfth hole; 12. The liquid level cylinder; 13. The fourth axis; 1301. The thirteenth hole; 14. The limit slider; 15. The slideway; 16. The roller; 1601. The second protrusion; 17. The platform; 18. The fifth axis. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the utility model clearer, the following is a further detailed description of a cam-type lifting platform proposed in the utility model in combination with the accompanying drawings and specific implementation methods. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the accompanying drawings are in a very simplified form and all use non-precise proportions. The terms "center", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, rather than indicating or implying that the cam-type lifting platform or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model, but only to facilitate and clearly assist in explaining the purpose of the implementation method of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the accompanying drawings.

[0039] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions for the implementation of the utility model, so they have no substantive technical significance. Any modification of the structure, change in the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model.

[0040] The specific structure of a cam-type lifting platform is described below:

[0041] See also Figure 1 The cam-type lifting platform of this embodiment includes a base 1, on which a driving mechanism 2 is arranged. A part of the driving mechanism 2 is connected to a part of the transmission mechanism 3, and another part of the transmission mechanism 3 is connected to the scissors-type mechanism 4. The kinematic pair is transmitted to the scissors-type mechanism 4 through the driving mechanism 2 to realize the rising or falling of the platform 17.

[0042] Please continue reading Figure 1 , Figure 5 and Figure 6 The driving mechanism 2 includes a motor 200 and a first shaft 201. The motor 200 is provided with a first hole 2001. A first recessed portion 20011 is provided in the first hole 2001. A first protruding portion 2011 is also provided on the surface of the first shaft 201.

[0043] Please continue reading Figure 1 , Figure 4 and Fig.14 The transmission mechanism 3 includes a belt 301 and a first sleeve 302. The first sleeve 302 is provided with a second hole 3021, and a second recessed portion 3022 is provided inside the second hole 3021. The first protrusion 2011 is engaged with the first recessed portion 20011 and the second recessed portion 3022 so that the first sleeve 302 can rotate and move synchronously with the first shaft 201. The first sleeve 302 is centrally symmetrically arranged at both ends of the first shaft 201. A third recessed portion 3023 is provided on the surface of the first sleeve 302, and a third hole 30231 is provided in the third recessed portion 3023. The first sleeve 302 also includes a first clamping plate 3024, and the first clamping plate 3024 includes a fourth hole 30241. One end of the belt 301 is provided between the third recessed portion 3023 and the first clamping plate 3024. The third recessed portion 3023 and the first clamping plate 3024 are fixedly connected through the third hole 30231 and the fourth hole 30241 so that the belt 301 is clamped into the first sleeve 302, and the first sleeve 302 moves with the movement of the first shaft 201.

[0044] Please continue reading Figure 1 , Figure 7 , Fig.10 , Fig.11 and Fig.13 The other end of the belt 301 is matched with the locking assembly 6, and the locking assembly 6 includes a first rod 601, a second clamping plate 602, a third clamping plate 603 and a second shaft 604. The second clamping plate 602 is provided with a fifth hole 6021 and a sixth hole 6022, and the second shaft 604 is fixedly arranged in the fifth hole 6021. The third clamping plate 603 is provided with a seventh hole 6031, and the belt 301 is matched with the second shaft 604 and arranged between the second clamping plate 602 and the third clamping plate 603. The third clamping plate 603 is symmetrically arranged on both sides of the second clamping plate 602 with the second clamping plate 602 as the center, and the second clamping plate 602 and the third clamping plate 603 are fixedly connected through the sixth hole 6022 and the seventh hole 6031. The belt 301 is matched with the second shaft 604 and arranged between the second clamping plate 602 and the third clamping plate 603 to achieve the tightening of the other end of the belt 301.

[0045] Please continue reading Figure 1 , Figure 3 , Figure 8 , Fig. 9 and Fig.13 The scissor mechanism 4 includes a first arm 401, a second arm 402, a cam plate 403, a pull rod 404 and a third arm 405. The first arm 401 includes an eighth hole 4011 and a ninth hole 4012, and the eighth hole 4011 is set at the center and both ends of the first arm 401. The second arm 402 is also provided with an eighth hole 4011 at the center and both ends. The first arm 401 and the second arm 402 are rotatably arranged crosswise through the eighth hole 4011 at the center. The ends of the first arm 401 and the second arm 402 of the bottom layer away from the base 1 are rotatably connected to the ends of the first arm 401 and the second arm 402 of the upper layer close to the base 1, and the third arm 405 is arranged at the intersection of the first arm 401 and the second arm 402 of the bottom layer and the upper layer. The third shaft 7 passes through the ninth hole 4012 and is fixedly connected to the first arm 401. Cam plates 403 are also provided at the bottom layer of the first arm 401 close to the base 1 and at the top layer of the first arm 401 away from the base 1, respectively. The cam plates 403 include a first arc 4031 and a second arc 4032. The cam plates 403 are fixed to the first arm 401. A fourth recessed portion 4041 is provided on the surface of the pull rod 404, and the fourth recessed portion 4041 is matched with the belt 301. The pull rod 404 is also provided with a tenth hole 4042, and the tenth hole 4042 is matched with one end of the conversion portion 8, and the other end of the conversion portion 8 is connected to the second sleeve 9 and the third sleeve 10, respectively. The second sleeve 9 and the third sleeve 10 are respectively matched with the first arm 401 and the side of the cam plate 403 to realize the movement of the pull rod 404.

[0046] Continue reading Figure 1 , Figure 2 , Figure 7 and Fig.13 , the third shaft 7 is also provided with a first plate 11, and the first plate 11 includes an eleventh hole 1101 and a twelfth hole 1102. The twelfth hole 1102 is matched with the third shaft 7, and the twelfth hole 1102 is respectively connected with the first sleeve 302, the liquid level cylinder 12, and the fourth shaft 13. One end of the liquid level cylinder 12 is rotatably matched with the first plate 11, and the other end is rotatably provided on the base 1. By providing the liquid level cylinder 12, a buffering effect can be played when the platform 17 descends, avoiding damage to components caused by descending too quickly. The fourth shaft 13 also includes a thirteenth hole 1301, one end of the first rod 601 is fixedly connected to the second clamping plate 602, and the other end is fixedly connected to the fourth shaft 13 through the thirteenth hole 1301.

[0047] Please continue reading Figure 1 and Fig.14 The base 1 also includes a detection component 5, which includes a suspension member 501 and a sensor 502. The suspension member 501 includes a fourteenth hole 5011. One end of the sensor 502 is fixed to the suspension member 501 through the fourteenth hole 5011, and the other end abuts against the belt 301. When the sensor 502 detects that it is not in contact with the belt 301, the device will immediately lock to prevent further ascent or descent causing a safety accident.

[0048] Please continue reading Figure 1 , Fig.12 and Fig.15 The base 1 is also provided with a limit slider 14 and a slideway 15. A roller 16 is provided on the ninth hole 4012 near the base 1, and the roller 16 can slidably match the ninth hole 4012 and the slideway 15. The roller 16 is provided with a second protrusion 1601 at one end near the limit slider 14, and the second protrusion 1601 is provided between the limit sliders 14 to limit the movement of the first arm 401 on the base 1. The ends of the first arm 401 and the second arm 402 on the upper layer away from the base 1 are fixedly connected to the platform 17 through the ninth hole 4012.

[0049] The specific working process of a cam-type lifting platform described in an embodiment of the utility model is described below:

[0050] When the platform 17 rises, the motor 200 drives the first shaft 201 to rotate, and the first sleeve 302 is driven by the first shaft 201. One end of the belt 301 is inserted into the first sleeve 302, and the other end is connected to the locking assembly 6 via the fifth shaft 18, the third shaft 7, the pull rod 404, and the first plate 11 and the first sleeve 302. Under the tension of the belt 301, the pull rod 404 slides from the first arc 4031 of the cam plate 403 to the second arc 4032 to support the first arm 401 and the second arm 402. When the platform 17 descends, the motor 200 drives the first shaft 201 to rotate in the opposite direction, the belt 301 loosens, and the pull rod 404 slides from the second arc 4032 of the cam plate 403 to the first arc 4031 due to the loosening of the belt 301 to achieve the descent of the first arm 401 and the second arm 402, and one end of the first arm 401 at the bottom moves along the slide 15 to the limit slider 14 away from the motor 200. The liquid level cylinder 12 is connected to the third shaft 7 through the first plate 11 to buffer the descent of the first arm 401 and the second arm 402.

[0051] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A cam-type lifting platform, comprising a base, characterized in that: A driving mechanism is arranged on the base, a part of the driving mechanism is connected to a part of the transmission mechanism, and another part of the transmission mechanism is connected to the scissor-type mechanism. The kinematic pair is transmitted to the scissor-type mechanism through the driving mechanism, and the scissor-type mechanism moves in a vertical direction to realize the rising or falling of the platform.

2. A cam type lifting platform as claimed in claim 1, characterized in that: The driving mechanism includes a motor and a first shaft, a first recessed portion is arranged inside the motor, and a first protruding portion is also arranged on the surface of the first shaft; the transmission mechanism includes a belt and a first sleeve, a second recessed portion is arranged on the inner side of the first sleeve; the first protruding portion is engaged with the first recessed portion and the second recessed portion so that the first sleeve is rotatably connected to the first shaft.

3. A cam type lifting platform as claimed in claim 2, characterized in that: A third recessed portion is arranged on the surface of the first sleeve, a third hole is arranged in the third recessed portion, the first sleeve also includes a first clamping plate, the first clamping plate includes a fourth hole, one end of the belt is arranged between the third recessed portion and the first clamping plate, and the third recessed portion is fixedly connected to the first clamping plate.

4. A cam type lifting platform as claimed in claim 3, characterized in that: The other end of the belt is matched with the locking assembly, and the locking assembly includes a first rod, a second clamping plate, a third clamping plate and a second shaft; the second shaft is fixedly connected to the second clamping plate; the belt is matched with the second shaft and is arranged between the second clamping plate and the third clamping plate; the third clamping plate is symmetrically arranged on both sides of the second clamping plate, and the second clamping plate is fixedly connected to the third clamping plate.

5. A cam type lifting platform as claimed in claim 4, characterized in that: The scissor mechanism includes a pair of scissor arms, which include a first arm and a second arm. The first arm and the second arm are rotatably arranged crosswise with each other. Adjacent scissor arms are connected by a third arm. A part of each scissor arm is connected to the base, and another part of each scissor arm is connected to the platform; the third shaft is fixedly connected to the first arm.

6. A cam type lifting platform as claimed in claim 5, characterized in that: The scissor-fork mechanism also includes a pull rod and a cam plate, wherein the cam plate is arranged on a portion of the scissor-fork arm, and the pull rod is surrounded by the belt and movably arranged on the cam plate; the cam plate includes a first arc and a second arc, wherein the second arc is arranged lower than the first arc.

7. A cam type lifting platform as claimed in claim 6, characterized in that: The pull rod surface is provided with a fourth recessed portion for matching the belt; the pull rod is matched with one end of the conversion portion, and the other end of the conversion portion is respectively connected to the second sleeve and the third sleeve, and the second sleeve and the third sleeve are respectively matched with the side of the first arm and the cam plate.

8. A cam type lifting platform as claimed in claim 7, characterized in that: A first plate is also provided on the third shaft, the first plate is matched with the third shaft, and the first plate is respectively connected with the first sleeve and the fourth shaft; one end of the liquid level cylinder is rotatably matched with the first plate, and the other end is rotatably provided on the base; one end of the first rod is fixedly connected to the second clamping plate, and the other end is fixedly connected to the fourth shaft.

9. A cam type lifting platform as claimed in claim 8, characterized in that: The base also includes a detection component, which includes a suspension member and a sensor, one end of the sensor is fixed to the suspension member, and the other end abuts against the belt; the base is also provided with a limit slider and a slideway; the fifth axis is rotatably arranged on the base.

10. A cam type lifting platform as claimed in claim 9, characterized in that: A roller is arranged on the base, and the roller can be slidably matched with the slideway. The roller is provided with a second protrusion at one end close to the limit slider, and the second protrusion is arranged between the limit sliders to limit the movement of the first arm on the base; the first arm and the second arm of the upper layer are fixedly connected to the platform at one end away from the base.

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