A lifting platform for preventing foreign objects from being clamped

Abstract

The utility model relates to a lifting platform that prevents foreign objects from being clamped. It includes a support frame, an upper support plate installed on the top of the support frame, a lower support plate installed on the bottom of the support frame, a guide rail arranged on the support frame, a sliding assembly sliding on the guide rail, a lifting mechanism for driving the sliding assembly to lift and lower, and a limiting assembly for limiting the sliding movement of the sliding assembly; the lifting mechanism is installed on the upper support plate and the lower support plate; the sliding assembly is clamped on the guide rail; the driving end of the lifting mechanism is connected to the sliding assembly by transmission; and two groups of symmetrically placed limiting assemblies are arranged on the support frame. It solves the problem that in the prior art solution, when the screw-type lifting platform is in use, there may be foreign objects or human hands under the lifting platform that hinder the lifting platform from descending due to improper operation or blind spots of the visual field. At this time, the lifting platform cannot stop moving because the motor continues to run and has not reached the limit point, which will cause damage to foreign objects, malfunction of the lifting platform, or pinching of human hands.

Description

Technical Field

[0001] The utility model relates to the field of lifting platforms, in particular to a lifting platform for preventing foreign objects from being clamped. Background Art

[0002] The screw lift structure is often used in small equipment such as 3D printers, CNC machine tools, and medical machinery. It is generally driven by motors such as stepper motors or DC motors. The lift is controlled by switches or drivers to move up and down, and the limit switch can stop the lift at the highest and lowest points. During use, due to improper operation or blind spots, there may be foreign objects or hands under the lift that prevent the lift from descending. At this time, the lift cannot stop because the motor continues to run and has not reached the limit point, which will cause damage to the foreign objects, malfunction of the lift, or hand injuries. Utility Model Content

[0003] The embodiment of the present application provides a lifting platform that can prevent foreign objects from being pinched, thereby solving the problem in the prior art that when the screw lifting platform is in use, there may be foreign objects or hands under the lifting platform that hinder the lifting platform from descending due to improper operation or blind spots. At this time, the lifting platform cannot stop moving because the motor continues to run and has not reached the limit point, which may cause damage to the foreign objects, malfunction of the lifting platform, or pinching of hands.

[0004] The technical solution adopted in the embodiment of the present application is as follows:

[0005] A foreign body anti-pinching lifting platform, comprising a support frame, an upper support plate installed at the top of the support frame, a lower support plate installed at the bottom of the support frame, a guide rail arranged on the support frame, a sliding component sliding on the guide rail, a lifting mechanism for driving the sliding component to lift and lower, and a limiting component for limiting the sliding movement of the sliding component; the lifting mechanism is installed on the upper support plate and the lower support plate; the sliding component is clamped on the guide rail; the driving end of the lifting mechanism is transmission-connected to the sliding component; two groups of symmetrically placed limiting components are arranged on the support frame;

[0006] The lifting mechanism comprises a screw, a screw nut, a driving device, a coupling, a bearing, a transmission plate and a limit touch plate; the driving device is mounted on the upper support plate; the bearing is arranged on the lower support plate; the coupling is arranged on the output shaft of the driving device; one end of the screw is arranged on the coupling; the other end of the screw is arranged on the inner ring of the bearing; the screw nut is mounted on the screw; the transmission plate and the limit touch plate are both arranged on the screw nut; the transmission plate abuts against the sliding assembly;

[0007] The limit assembly comprises a limit switch and a support member; the limit switch is arranged on the support member; and the support member is arranged on the support frame.

[0008] A further technical solution is: the sliding assembly includes a slider, a cantilever and a lifting platform; the slider slides on the guide rail; the cantilever is arranged on the slider; the lifting platform is arranged on the cantilever; and the cantilever rests against the top of the transmission plate.

[0009] A further technical solution is: the driving device is a motor.

[0010] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0011] 1. Due to the use of the support frame, upper support plate, lower support plate, guide rail, sliding assembly, lifting mechanism and limit assembly, the drive device in the lifting mechanism rotates forward, causing the screw nut to move upward along the screw, and the cantilever is pushed through the transmission plate to enable the lifting platform to move upward. When it reaches the limit switch located above, the drive device stops, and the screw nut and the lifting platform stop moving. When the drive device reverses, causing the screw nut to move downward along the screw, the lifting platform will also move downward because the cantilever loses the support of the transmission plate. When there is no foreign matter under the lifting platform, when the screw nut reaches the limit switch located below, the drive device stops, the screw nut stops moving, and the lifting platform is supported by the transmission plate again and stops moving. When the lifting platform moves downward, if there is a foreign matter under the lifting platform, it will cause the lifting platform to be unable to move downward and become stationary, so it will not cause damage from foreign matter or injury to people. Because the lifting platform and cantilever are not connected to the transmission plate and the lead screw nut, the lead screw nut will continue to move downward until it reaches the limit switch below. At this time, the drive device stops and the lead screw nut stops moving. Therefore, the presence of foreign matter under the lifting platform will not cause the lifting platform or the lifting platform structure to malfunction. When all the drive devices stop, the lifting platform can be manually lifted and the foreign matter under the lifting platform can be removed. The lifting platform can then move smoothly downward to the initial position. The entire operation process is simple and reliable, and it is also convenient for the staff to operate. Therefore, the problem that the lifting platform cannot stop moving because the motor continues to run and has not reached the limit point, resulting in damage to foreign matter, malfunction of the lifting platform, and hand injuries is solved. At the same time, the transmission lead screw nut is separated from the lifting platform, and the structure is simple, without the need to add other pressure sensors, radar sensors and other devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a schematic diagram of the overall structure of an anti-foreign object clamping lifting platform in an embodiment of the utility model.

[0013] Figure 2 It is a partial structural schematic diagram for reflecting the lifting mechanism in the embodiment of the utility model.

[0014] Figure 3 It is a partial structural schematic diagram for reflecting the limiting component in the embodiment of the utility model.

[0015] Figure 4 It is a partial structural schematic diagram for reflecting the sliding assembly in the embodiment of the utility model.

[0016] In the figure: 1. support frame; 2. upper support plate; 3. lower support plate; 4. guide rail; 5. sliding assembly; 51. slider; 52. cantilever; 53. lifting platform; 6. lifting mechanism; 61. screw; 62. screw nut; 63. driving device; 64. coupling; 65. bearing; 66. transmission plate; 67. limit touch plate; 7. limit assembly; 71. limit switch; 72. support member. DETAILED DESCRIPTION

[0017] The embodiment of the present application provides a lifting platform that can prevent foreign objects from being pinched, thereby solving the problem in the prior art that when the screw lifting platform is in use, there may be foreign objects or hands under the lifting platform that hinder the lifting platform from descending due to improper operation or blind spots. At this time, the lifting platform cannot stop moving because the motor continues to run and has not reached the limit point, which may cause damage to the foreign objects, malfunction of the lifting platform, or pinching of hands.

[0018] The technical solution in the embodiment of the present application is to solve the above problems, and the overall idea is as follows:

[0019] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] A lifting platform for preventing foreign objects from being clamped, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes a support frame 1, an upper support plate 2 installed on the top of the support frame 1, a lower support plate 3 installed on the bottom of the support frame 1, a guide rail 4 arranged on the support frame 1, a sliding assembly 5 sliding on the guide rail 4, a lifting mechanism 6 for driving the sliding assembly 5 to rise and fall, and a limiting assembly 7 for limiting the sliding movement of the sliding assembly 5. The lifting mechanism 6 is installed on the upper support plate 2 and the lower support plate 3. The sliding assembly 5 is clamped on the guide rail 4. The driving end of the lifting mechanism 6 is connected to the sliding assembly 5 by transmission. Two groups of limiting assemblies 7 are symmetrically arranged on the support frame 1.

[0021] The lifting mechanism 6 includes a screw 61, a screw nut 62, a driving device 63, a coupling 64, a bearing 65, a transmission plate 66 and a limit touch plate 67. The driving device 63 is mounted on the upper support plate 2. The bearing 65 is arranged on the lower support plate 3. The coupling 64 is arranged on the output shaft of the driving device 63. One end of the screw 61 is arranged on the coupling 64. The other end of the screw 61 is arranged on the inner ring of the bearing 65. The screw nut 62 is mounted on the screw 61. The transmission plate 66 and the limit touch plate 67 are both arranged on the screw nut 62. The transmission plate 66 abuts against the sliding component 5.

[0022] The limit assembly 7 includes a limit switch 71 and a support member 72. The limit switch 71 is arranged on the support member 72. The support member 72 is arranged on the support frame 1.

[0023] The upper support plate 2 is fixedly mounted on the top of the support frame 1. The lower support plate 3 is fixedly mounted on the bottom of the support frame 1. The guide rail 4 is fixedly mounted on the front end of the support frame 1. The lifting mechanism 6 is fixedly mounted on the upper support plate 2 and the lower support plate 3. Two sets of symmetrically placed limit assemblies 7 are fixedly mounted on the front end of the support frame 1. The driving device 63 is fixedly mounted on the top of the upper support plate 2. The driving device 63 is preferably a motor. The bearing 65 is fixedly embedded in the lower support plate 3. The coupling 64 is fixedly connected to the output shaft of the driving device 63. One end of the screw rod 61 is fixedly connected to the coupling 64. The other end of the screw rod 61 is fixedly connected to the inner ring of the bearing 65. The screw nut 62 is mounted on the screw rod 61. When the output shaft of the driving device 63 drives the screw rod 61 to rotate, the screw nut 62 on the screw rod 61 will move up and down along the screw rod 61 itself. The transmission plate 66 and the limit touch plate 67 are both fixedly mounted on the screw nut 62, and the transmission plate 66 is located above the limit touch plate 67. The transmission plate 66 abuts against the bottom end of the sliding assembly 5. The limit switch 71 is fixedly connected to the support member 72. The support member 72 is fixedly connected to the front end of the support frame 1.

[0024] like Figure 4 As shown, the sliding assembly 5 includes a slider 51, a cantilever 52 and a lifting platform 53. The slider 51 slides on the guide rail 4. The cantilever 52 is arranged on the slider 51. The lifting platform 53 is arranged on the cantilever 52. The cantilever 52 abuts against the top of the transmission plate 66.

[0025] The cantilever 52 is fixedly connected to the slider 51. The lifting platform 53 is fixedly connected to the cantilever 52. The cantilever 52 abuts against the top of the transmission plate 66. The transmission plate 66 moves upward to drive the cantilever 52 to move upward.

[0026] Due to the arrangement of the support frame 1, the upper support plate 2, the lower support plate 3, the guide rail 4, the sliding assembly 5, the lifting mechanism 6 and the limit assembly 7, the driving device 63 in the lifting mechanism 6 rotates forward, so that the screw nut 62 moves upward along the screw 61, and the cantilever 52 is pushed by the transmission plate 66, so that the lifting platform 53 moves upward. When it reaches the limit switch 71 located above, the driving device 63 stops rotating, and the screw nut 62 and the lifting platform 53 stop moving. When the driving device 63 is reversed, the screw nut 62 moves downward along the screw 61, and the lifting platform 53 will also move downward because the cantilever 52 loses the support of the transmission plate 66. When there is no foreign matter under the lifting platform 53, when the screw nut 62 reaches the limit switch 71 located below, the driving device 63 stops rotating, the screw nut 62 stops moving, and the lifting platform 53 is supported by the transmission plate 66 again and stops moving. When the lifting platform 53 moves downward, if a foreign object appears under the lifting platform 53, the lifting platform 53 will not be able to continue to move downward and will be in a stationary state, so it will not cause damage by foreign objects or injuries to human hands. Because the lifting platform 53 and the cantilever 52 are not connected to the transmission plate 66 and the screw nut 62, the screw nut 62 will continue to move downward until it reaches the limit switch 71 located below. At this time, the drive device 63 stops rotating and the screw nut 62 stops moving. Therefore, the appearance of foreign objects under the lifting platform 53 will not cause the lifting platform 53 or the lifting platform structure to fail. When the drive device 63 stops rotating, the lifting platform 53 can be manually lifted and the foreign object under the lifting platform 53 can be removed. The lifting platform 53 can move smoothly downward to the initial position. The entire operation process is simple and reliable, and it is convenient for the staff to operate. Therefore, the problem that the lifting platform 53 cannot stop moving due to the continuous operation of the motor and has not reached the limit point, resulting in damage by foreign objects, failure of the lifting platform, and injury to human hands is solved. At the same time, the transmission screw nut is separated from the lifting platform, and the structure is simple, and there is no need to add other pressure sensors, radar sensors and other devices.

[0027] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0028] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A lifting platform for preventing foreign objects from being pinched, characterized in that: The invention comprises a support frame (1), an upper support plate (2) mounted on the top of the support frame (1), a lower support plate (3) mounted on the bottom of the support frame (1), a guide rail (4) arranged on the support frame (1), a sliding component (5) sliding on the guide rail (4), a lifting mechanism (6) for driving the sliding component (5) to rise and fall, and a limiting component (7) for limiting the sliding movement of the sliding component (5); the lifting mechanism (6) is mounted on the upper support plate (2) and the lower support plate (3); the sliding component (5) is clamped on the guide rail (4); the driving end of the lifting mechanism (6) is transmission-connected to the sliding component (5); and two groups of limiting components (7) symmetrically arranged are arranged on the support frame (1); The lifting mechanism (6) comprises a screw (61), a screw nut (62), a driving device (63), a coupling (64), a bearing (65), a transmission plate (66) and a limit touch plate (67); the driving device (63) is mounted on the upper support plate (2); the bearing (65) is arranged on the lower support plate (3); the coupling (64) is arranged on the output shaft of the driving device (63); one end of the screw (61) is arranged on the coupling (64); the other end of the screw (61) is arranged on the inner ring of the bearing (65); the screw nut (62) is mounted on the screw (61); the transmission plate (66) and the limit touch plate (67) are both arranged on the screw nut (62); the transmission plate (66) abuts against the sliding component (5); The limit assembly (7) comprises a limit switch (71) and a support member (72); the limit switch (71) is arranged on the support member (72); and the support member (72) is arranged on the support frame (1).

2. The anti-pinch foreign body lifting platform according to claim 1, characterized in that: The sliding assembly (5) comprises a slider (51), a cantilever (52) and a lifting platform (53); the slider (51) slides on the guide rail (4); the cantilever (52) is arranged on the slider (51); the lifting platform (53) is arranged on the cantilever (52); the cantilever (52) abuts against the top end of the transmission plate (66).

3. The anti-pinch foreign body lifting platform according to claim 2, characterized in that: The driving device (63) is a motor.

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