Lifting device

Abstract

The utility model discloses a lifting device which comprises a lifting unit, a driving unit, a frame unit and a protection unit, the lifting unit is driven by the driving unit to move up and down in the frame unit, the protection unit comprises a protection plate and an anti-falling piece, the anti-falling piece is connected with the lifting unit, and the protection plate is connected with the frame unit. The anti-falling piece is used for preventing the lifting unit from uncontrolled falling in the frame unit under the condition that the driving unit does not provide power by switching the clamping state of the anti-falling piece and the protection plate, and at least part of the lifting unit is wrapped by the protection plate. The lifting device has the advantages that at least part of the lifting unit is wrapped by the protection plate, the lifting unit is protected, meanwhile, the protection plate is matched with the anti-falling piece, the situation that the lifting unit falls accidentally under the condition that the driving unit does not provide power is effectively prevented, and the lifting device and operators are protected.

Description

Technical Field

[0001] The present application is applied to the field of automated transportation, and specifically relates to a lifting device. Background Art

[0002] The hoist is a common device in the field of automated transportation. Its function is to move the load up and down in the vertical direction and change the height of the material in and out. In the prior art, the hoist needs to be equipped with additional protection to consider the safety of equipment operation and the possibility of scattering of the conveyed objects. It also needs to be equipped with an anti-fall device to consider the safety of operators in the maintenance state. At the same time, for the accuracy of equipment operation, a speed sensor needs to be installed to measure the lifting speed. There are many components and the cost is high. Now there is an urgent need for a hoist that occupies a small space, has a low cost and can achieve the above functions. Summary of the invention

[0003] In view of the above reasons, the present application discloses a lifting device, including a lifting unit, a driving unit, a frame unit and a protective unit. The lifting unit is driven by the driving unit to move up and down in the frame unit. The protective unit includes a protective plate and an anti-falling component. The anti-falling component is connected to the lifting unit, and the protective plate is connected to the frame unit. The anti-falling component prevents the lifting unit from falling uncontrollably in the frame unit when the driving unit does not provide power by switching to an engaging state with the protective plate. The protective plate covers at least a portion of the lifting unit.

[0004] Preferably, the lifting unit includes a synchronous belt mounted between the upper and lower ends of the frame unit, a lifting frame connected to one end of the synchronous belt, and a conveyor arranged on the lifting frame. The synchronous belt drives the conveyor to move up and down in the frame unit when driven by the driving unit, and the protective plate covers the side of the synchronous belt away from the conveyor in the outward stage.

[0005] Preferably, the protective plate includes a connecting plate and inverted tooth plates on both sides of the connecting plate, the inverted tooth plates are perpendicular to the connecting plate and extend in the horizontal direction, grooves are formed between the inverted tooth plates on both sides and the connecting plates, the length direction of the protective plate is perpendicular to the ground direction, and the groove accommodates the forward stage of the synchronous belt.

[0006] Preferably, the inverted tooth plate has a plurality of continuous inverted teeth on the side away from the connecting plate, and there is a gap between the ends of the inverted teeth. The anti-falling component includes a cylinder, a mounting seat, a limit baffle and a rotating shaft. The limit baffle is arranged on the mounting seat through the rotating shaft. The mounting seat is fixedly connected to the lifting unit. The free end of the cylinder is connected to the limit baffle. Under the action of the free end of the cylinder, the anti-falling baffle can rotate around the rotating shaft relative to the mounting seat and switch to a state of engagement with the inverted tooth plate.

[0007] Preferably, the anti-fall baffle includes a first end and a second end connected in sequence at an angle, the first end is connected to the free end of the cylinder, when the free end of the cylinder is in an extended state, the second end does not overlap with the protective plate in a projection in a direction perpendicular to the ground, and when the free end of the cylinder is in a retracted state, the second end contacts the inverted teeth on the inverted tooth plate and is limited between two adjacent inverted teeth.

[0008] Preferably, the speed meter assembly further comprises a counting sensor, wherein the counting sensor is arranged on the mounting seat and is used to detect the inverted teeth and the intervals at positions corresponding to the counting sensor and generate a potential signal, and the speed of the lifting unit is determined according to the potential signal.

[0009] Preferably, the anti-fall component also includes the position sensor, which is arranged on the mounting seat and is used to detect that the first end is in a state where the free section of the cylinder is extended, or that the first end is in a state where the free end of the cylinder is retracted.

[0010] Preferably, it further comprises a linear slide rail, the length direction of the linear slide rail is perpendicular to the ground direction, the linear slide rail is arranged on the frame unit, and the lifting frame is connected to the linear slide rail through the slider.

[0011] Preferably, the protection unit further comprises a partition, the mounting seat is connected to the lifting frame via the partition, and the partition is placed between the conveyor and the outward stage of the synchronous belt.

[0012] Preferably, it also includes an in-place limit assembly and an over-travel limit assembly, the in-place limit assembly includes a position detector and a detection plate, the position detector is respectively arranged at the upper and lower travel end height positions of the conveyor, the detection plate is arranged on the lifting frame, and can be detected by the position detector at the corresponding position, the driving unit is controlled according to the detection result, the over-travel limit assembly includes a limit block, the limit block is respectively arranged at the over-travel position of the upper and lower travel end points of the conveyor, and the lifting frame is limited in the vertical direction between the upper and lower limit blocks.

[0013] The advantage of the present application is that the protective plate covers at least part of the lifting unit, thereby protecting the lifting unit. At the same time, the protective plate cooperates with the anti-falling part to effectively prevent the lifting unit from accidentally falling when the driving unit does not provide power, thereby providing good protection for the lifting device itself and the operator. By detecting the relative position of the protective plate and the lifting unit, the lifting speed of the lifting unit can be measured, without the need to install additional speed measuring equipment, thereby reducing costs.

[0014] Other specific features and specific advantages of the present application will be described in the subsequent description, or some features and advantages can be inferred or unambiguously determined from the description, or can be learned by implementing the above-mentioned technology of the present disclosure.

[0015] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of this application.

[0018] Figure 2 This is the front view of the application.

[0019] Figure 3 This is a side view of the application.

[0020] Figure 4 This is the rear view of this application.

[0021] Figure 5 This is a partial structural diagram of the lifting unit of the present application.

[0022] Figure 6 This is a partial structural diagram of the protection unit of the present application.

[0023] Figure 7 This is a schematic diagram of the limit baffle structure of this application.

[0024] Figure 8 This is a schematic diagram of the non-fall prevention state of the protection unit of the present application.

[0025] Fig. 9 This is a schematic diagram of the anti-falling state of the protection unit of the present application.

[0026] In the figure: 1. frame; 2. idler wheel group; 3. driving wheel; 4. synchronous belt; 5. motor; 6. lifting back plate; 7. support frame; 8. conveyor; 9. connecting block; 10. linear guide; 11. slider; 12. protective plate; 13. connecting beam; 14. anti-fall part; 15. connecting plate; 16. inverted tooth plate; 1601, inverted tooth; 1602, interval; 17. cylinder; 18. mounting seat; 19. limit baffle; 1901, first end; 1902, second end; 20, rotating shaft; 21. counting sensor; 22. sensor connector; 23. position sensor; 24. partition; 25. position detector; 26. detection sheet; 27. limit block. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention and can be explained with reference to all the drawings.

[0028] like Figures 1 to 5As shown, the frame unit is a rectangular parallelepiped frame 1 formed by aluminum profiles, an idler wheel group 2 is arranged above the frame 1, a driving wheel 3 is arranged below the frame 1, a synchronous belt 4 is an endless belt, and the synchronous belt 4 is sleeved between the idler wheel group 2 and the driving wheel 3. The driving wheel 3 is driven to rotate by a motor 5, thereby driving the synchronous belt 4 to rotate in a direction perpendicular to the ground. The lifting frame is composed of a lifting back plate 6 and a support frame 7. The two support frames 7 extend in a horizontal direction perpendicular to the lifting back plate 6 respectively. The support frame 7 is used to be fixedly connected to a conveyor 8, which plays a role in the conveyor 8. Supporting function, the side of the lifting back plate 6 away from the conveyor 8 is fixedly connected to one side of the synchronous belt 4 through the connecting block 9, wherein the connecting side is the side of the synchronous belt 4 close to the conveyor 8, that is, this side is the outgoing stage of the synchronous belt 4, and the other side, that is, the side away from the conveyor 8, is the return stage of the synchronous belt 4. The motor 5 drives the synchronous belt 4 to rotate, driving the lifting back plate 6 to move up and down in a direction perpendicular to the ground, and at the same time drives the conveyor 8 to move up and down in the frame 1 perpendicular to the ground, thereby completing the lifting action of different heights for the load on the conveyor 8. Two linear guides 10 are respectively arranged on both sides of the frame 1, and the length direction of the linear guide 10 is perpendicular to the ground. Slide blocks 11 are provided on both sides of the lifting back plate 6, and the slide blocks 11 cooperate with the linear guides 10 to guide the up and down displacement of the conveyor 8. The protective plate 12 is arranged between the upper and lower ends of the frame 1 by connecting the cross beam 13, and is specifically arranged on one side of the outward stage of the synchronous belt 4 and covers and accommodates the outward stage of the synchronous belt 4. By setting the protective plate 12, a certain protective effect is played on the outward stage of the synchronous belt 4 to prevent the synchronous belt 4 from being affected by external forces such as the load tipping over or side movement and contact with the synchronous belt 4, which affects the lifting process. The anti-falling member 14 is fixedly connected to the lifting back plate 6. The anti-falling member 14 can switch its state and control the contact state with the protective plate 12 by switching the state. When the anti-falling member 14 is not in contact with the protective plate 12, the anti-falling member 14 has no effect on the lifting and lowering of the conveyor 8 in the frame 1. When the anti-falling member 14 is in contact with the protective plate 12, a snap connection will be generated between the anti-falling member 14 and the protective plate 12. When the anti-falling member 14 is in the maintenance state or the emergency stop state, the operator switches the anti-falling member 14 to the snap connection state with the protective plate 12 by giving the anti-falling member 14 an electric control signal, thereby preventing the conveyor 8 from falling under the action of gravity or when the motor 5 is out of control, thereby providing a guarantee for the safety of the operator. The above-mentioned protective plate 12 not only protects the synchronous belt 4, but also cooperates with the anti-falling member 14 to prevent the conveyor 8 from falling. No extra components need to be installed, and while improving safety, the cost is effectively reduced.

[0029] like Figures 1 to 6As shown, in some embodiments, the protective plate 12 is composed of a connecting plate 15 and inverted tooth plates 16 on both sides of the connecting plate 15. The inverted tooth plates 16 are perpendicular to the connecting plate 15 and extend in the horizontal direction. The length directions of the connecting plate 15 and the inverted tooth plates 16 are both perpendicular to the ground direction. The connecting plate 15 and the inverted tooth plates 16 on both sides form a groove with an opening direction facing the direction of the conveyor, and the forward stage of the synchronous belt 4 is accommodated in the groove.

[0030] In some embodiments, Figures 6 to 9 As shown, the side of the inverted tooth plate 16 away from the connecting plate 15 has a plurality of continuous inverted teeth 1601, and the tooth shape of the inverted teeth 1601 is a right triangle, wherein the right angle side of each inverted tooth 1601 is upward relative to the acute angle side, that is, in the vertical direction, the acute angle side of the previous inverted tooth 1601 is connected to the right angle side of the next inverted tooth 1601, and a gap 1602 is formed between adjacent inverted teeth 1601. The anti-falling component 14 is composed of a cylinder 17, a mounting seat 18, a limit baffle 19 and a rotating shaft 20. The fixed end of the cylinder 17 is fixedly connected to the mounting seat 18, and the mounting seat 18 is fixedly connected to the lifting back plate 6. The mounting seat 18 has a relatively For the protruding ear, the rotating shaft 20 passes through the middle section of the limit baffle 19 and is connected to the ear. The limit baffle 19 can rotate around the rotating shaft 20. The free end of the cylinder 17 is floatingly connected to one end of the limit baffle 19. Through the extension and retraction of the free end of the cylinder 17, the limit baffle 19 is driven to be at least partially placed in the interval 1602 between adjacent inverted teeth 1601. When the conveyor 8 moves downward under the action of gravity, the limit baffle 19 is placed in the interval 1602 between adjacent inverted teeth 1601 and abuts against the right-angled edge of the inverted teeth 1601, providing an upward supporting force for the conveyor 8, thereby preventing the conveyor 8 from falling.

[0031] like Figures 6 to 9As shown, in some embodiments, the limit baffle 19 is a first end 1901 and a second end 1902 connected in sequence, the first end 1901 and the second end 1902 are connected at an obtuse angle, the installation position of the first end 1901 is vertically upward relative to the second end 1902, and the free end of the cylinder 17 extends horizontally toward the protective plate 12. When the free end of the cylinder 17 is in an extended state, the first end 1901 rotates toward the direction approaching the protective plate 12, and the second end 1902 rotates toward the direction away from the protective plate 12. Neither the first end 1901 nor the second end 1902 contacts the protective plate 12, that is, the first end 1901 and the second end 1902 do not overlap with the protective plate 12 in the projection in the direction perpendicular to the ground, and have no effect on the up and down displacement of the conveyor 8 in the frame 1; when the free end of the cylinder 17 is in a retracted state, the first end 1901 rotates toward the direction away from the protective plate 12, and the second end 1902 rotates toward the direction approaching the protective plate 12. The second end 1902 will be between adjacent inverted teeth 1601, and under the action of gravity, it will abut against the right-angle side of the inverted teeth 1601, thereby providing an upward support force for the conveyor 8 to prevent the conveyor 8 from falling.

[0032] In some embodiments, Figure 6 , Figure 8 and Fig. 9 As shown, the counting sensor 21 is fixedly arranged on one side of the mounting base 18 through the sensor connector 22, and the sensing end of the counting sensor 21 is close to the inverted tooth plate 16 on one side and does not contact the inverted tooth plate 16. When the sensing end of the counting sensor 21 detects that the corresponding position is the inverted tooth 1601, it will output a first potential signal, and when the sensing end of the counting sensor detects that the corresponding position is the interval 1602 between adjacent inverted teeth 1601, it will output a second potential signal. During the lifting process, the position of the counting sensor 21 will produce a synchronous up and down displacement relative to the inverted tooth plate 16 with the up and down displacement of the conveyor 8, that is, the first potential signal and the second potential signal will be switched in sequence, and the change of the potential signal can be sent to the host computer and calculated by the host computer. Since the height of the inverted tooth plate 16 and the spacing between the inverted teeth 1601 are fixed and known, the lifting speed can be fed back through the calculation results, and the height position of the conveyor 8 can also be fed back according to the reset state. Compared with the prior art, the above method does not use high-cost encoding calculation devices and speed sensors, and only uses low-cost counting sensors and protective plates 12 to complete speed output.

[0033] In some embodiments, Figure 6As shown, the position sensor 23 is arranged on the mounting base through the sensor connector 22, specifically, on the upper end of the mounting base 18. The detection end of the position sensor 23 is directed downward and corresponds to the position of the first end 1901 of the limit baffle 19. When the first end 1901 is in an extended state at the free end of the cylinder 17, the position sensor 23 detects that the first end 1901 is not directly below it, and feeds back a first detection signal. When the first end 1901 is in a retracted state at the free end of the cylinder 17, the position sensor 23 can detect that the first end 1901 is directly below it, and feeds back a second detection signal. The current position of the first end 1901 is determined by the first detection signal or the second detection signal. Since the installation position of the position sensor 23 is close to the position of the first end 1901, the detection of the extended or retracted state of the cylinder 17 can be realized without the need for a high-precision and high-cost position sensor 23, so as to determine whether the anti-falling component 14 is in an anti-falling state.

[0034] In some embodiments, Figures 1 to 6 As shown, the mounting seat 18 is fixedly connected to the lifting back plate 6 through a partition 24, and the partition 24 is placed between the conveyor 8 and the outgoing stage of the synchronous belt 4. The width of the partition 24 is greater than the distance between the inverted tooth plates 16 on both sides, and the partition 24 is close to and does not contact the inverted tooth plates 16. The partition 24 and the protective plate 12 provide horizontal protection on all four sides of the outgoing stage of the synchronous belt 4 at the position of the conveyor 8 loading, further preventing the load on the conveyor 8 from affecting the outgoing stage of the synchronous belt 4 due to temperature or tipping, thereby improving the reliability of the present application.

[0035] In some embodiments, Figure 4 As shown, the frame 1 is provided with position detectors 25 at the upper stroke end position and the lower stroke end position of the conveyor 8, and a detection piece 26 is provided on one side of the lifting back plate 6. When the conveyor 8 is lifted to the upper stroke end position, the detection piece 26 is detected by the corresponding position detector 25 to generate a detection signal, and the motor 5 is controlled to stop running according to the detection signal, so that the conveyor 8 stays at the upper stroke end position. When the conveyor 8 is lifted to the lower stroke end position, the detection piece 26 is detected by the corresponding position detector 25 to generate a detection signal, and the motor is controlled to stop running according to the detection signal, so that the conveyor 8 stays at the lower stroke end position. The frame 1 is provided with limit blocks 27 at the overtravel position of the upper stroke and the overtravel position of the lower stroke of the conveyor 8. The overtravel position is beyond the preset stop position, specifically, it can be a position beyond 5% of the total stroke, to prevent the conveyor 8 from overtravel due to loss of control of the motor 5 or inaccurate detection of the position detector 25. When the conveyor 8 overtravels, the support frame 7 will contact the limit block 27, and the conveyor 8 is prevented from overtravel through physical limitation, thereby improving work safety.

[0036] The protective plate 12 in the present application not only plays a protective role for the synchronous belt, but also cooperates with the anti-falling part 14 to play an anti-falling role. By cooperating with the counting sensor 21, it plays a role in detecting the lifting and lowering speed of the conveyor 8, achieving the effect of one thing for multiple uses, effectively reducing costs, simplifying the structure, and improving safety and reliability.

[0037] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that any technician familiar with this technical field can still modify the technical solutions recorded in the aforementioned embodiments within the technical scope disclosed in the present application, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered by the protection scope of the present application.

Claims

1. A lifting device, characterized in that: The invention comprises a lifting unit, a driving unit, a frame unit and a protection unit. The lifting unit moves up and down in the frame unit under the drive of the driving unit. The protection unit comprises a protection plate and an anti-falling component. The anti-falling component is connected to the lifting unit, and the protection plate is connected to the frame unit. The anti-falling component prevents the lifting unit from falling uncontrollably in the frame unit when the driving unit does not provide power by switching to an engaging state with the protection plate. The protection plate covers at least a portion of the lifting unit.

2. The lifting device according to claim 1, characterized in that: The lifting unit includes a synchronous belt mounted between the upper and lower ends of the frame unit, a lifting frame connected to one end of the synchronous belt, and a conveyor arranged on the lifting frame. The synchronous belt drives the conveyor to move up and down in the frame unit when driven by the driving unit, and the protective plate covers the side of the synchronous belt away from the conveyor in the outward stage.

3. The lifting device according to claim 2, characterized in that: The protective plate includes a connecting plate and inverted tooth plates on both sides of the connecting plate. The inverted tooth plates are perpendicular to the connecting plate and extend in the horizontal direction. Grooves are formed between the inverted tooth plates on both sides and the connecting plate. The length direction of the protective plate is perpendicular to the ground direction, and the groove accommodates the forward stage of the synchronous belt.

4. The lifting device according to claim 3, characterized in that: The inverted tooth plate has a plurality of continuous inverted teeth on the side away from the connecting plate, and there is a gap between the ends of the inverted teeth. The anti-falling component includes a cylinder, a mounting seat, a limit baffle and a rotating shaft. The limit baffle is arranged on the mounting seat through the rotating shaft. The mounting seat is fixedly connected to the lifting unit. The free end of the cylinder is connected to the limit baffle. Under the action of the free end of the cylinder, the limit baffle can rotate around the rotating shaft relative to the mounting seat and switch to an engaged state with the inverted tooth plate.

5. The lifting device according to claim 4, characterized in that: The limit baffle includes a first end and a second end connected in sequence at an angle, the first end is connected to the free end of the cylinder, when the free end of the cylinder is in an extended state, the second end does not overlap with the protective plate in a projection perpendicular to the ground direction, when the free end of the cylinder is in a retracted state, the second end contacts the inverted teeth on the inverted tooth plate and is limited between two adjacent inverted teeth.

6. The lifting device according to claim 4, characterized in that: It also includes a speed meter component, which includes a counting sensor. The counting sensor is arranged on the mounting seat and is used to detect the inverted teeth and the intervals at the corresponding positions of the counting sensor and generate a potential signal, and determine the speed of the lifting unit according to the potential signal.

7. The lifting device according to claim 5, characterized in that: The anti-falling component also includes a position sensor, which is arranged on the mounting seat and is used to detect that the first end is in a state where the free section of the cylinder is extended, or that the first end is in a state where the free end of the cylinder is recovered.

8. The lifting device according to claim 2, characterized in that: It also includes a linear slide rail, the length direction of which is perpendicular to the ground direction, the linear slide rail is arranged on the frame unit, and the lifting frame is connected to the linear slide rail through a sliding block.

9. The lifting device according to claim 4, characterized in that: The protection unit further comprises a partition, the mounting seat is connected to the lifting frame via the partition, and the partition is placed between the conveyor and the outward stage of the synchronous belt.

10. The lifting device according to claim 2, characterized in that: It also includes an in-place limit assembly and an over-travel limit assembly, the in-place limit assembly includes a position detector and a detection piece, the position detector is respectively arranged at the upper and lower travel end height positions of the conveyor, the detection piece is arranged on the lifting frame, and can be detected by the position detector at the corresponding position, and the driving unit is controlled according to the detection result, the over-travel limit assembly includes a limit block, the limit block is respectively arranged at the over-travel position of the upper and lower travel end points of the conveyor, and the lifting frame is limited in the vertical direction between the upper and lower limit blocks.

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