Top driving type four-column elevator

Abstract

The invention discloses a top driving type four-column elevator which comprises a supporting part, a top driving device and a plurality of chains which are symmetrically arranged relative to the supporting part, the top driving device is installed on the top of the supporting part and connected with the chains, and lifting frames are connected to the two chains on one side. A driver is arranged on the top platform, a driving motor is arranged in the middle, power is synchronously transmitted to the two sides through a first coupler and transmitted to the driving chain wheels on the left side and the right side through a reverser, the lifting frames and the balance weights are arranged on the left side and the right side of the lifter correspondingly, and the lifting frames and the balance weights are connected through chains. The elevator has the advantages that power is transmitted to the two sides through the first coupler, synchronism of the left side and the right side is guaranteed, the chains are driven on the left side and the right side respectively, the length of the chains is shortened, and the maintenance difficulty of the elevator is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of coating conveying, in particular to a top-driven four-column lift. Background Art

[0002] During the spraying process of automobiles, the car body needs to be fixed on the conveyor skid, and the conveyor trolley carries the workpiece for various levels of treatment, such as pre-treatment and electrophoresis. In the painting process, the conveyor trolley and the car body not only run on the plane, but sometimes also need to be lifted and lowered in height, that is, to interact between the high-level platform and the bottom-level platform. Because the conveyor trolley travels on the bottom-level platform and the high-level platform respectively through tracks, this requires that the conveyor trolley and the car body can be quickly transferred to the lifting mechanism before and after the lifting is completed, or the lifting mechanism can be transferred to the track of the high-level platform or the bottom-level platform.

[0003] The Chinese patent with publication number CN105016243B discloses a four-column chain lift, which realizes the function of synchronous lifting of the left and right lifting frames by connecting the left and right lifting frames and the counterweight through a chain. This technology has the following shortcomings: since the chain needs to connect the left and right lifting frames at the same time, the chain is relatively long, and the length of the chain relative to the two lifting frames is different, and then the elongation of the chain is different, which will increase the difficulty of adjusting the synchronous operation of the lifting frames on both sides. At the same time, since the chain connects both sides at the same time, the difficulty of maintaining the lift is also increased. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a top-driven four-post lift to solve the problem.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A top-driven four-post lift comprises a support portion, a top drive device and a plurality of chains vertically arranged on the support portion, wherein the chains are symmetrically arranged in pairs with respect to the support portion, the top drive device is installed on the top of the support portion and connected to the chains, and a lifting frame is connected to the two chains on each side, and the two lifting frames are both provided with a load-bearing track.

[0007] It is further configured as follows: the support portion includes four columns symmetrically arranged in pairs, the four columns form a frame, a top platform is arranged on the top of the frame, and the top drive device is installed on the top platform.

[0008] It is further configured as follows: the top drive device includes a drive motor arranged on the top platform, and the output shafts on both sides of the drive motor are each provided with a first coupling, and the other ends of the two first couplings are installed with a commutator, and the output ends of the two commutators are provided with a drive sprocket, and the other end of the drive sprocket is connected to the second coupling, and the other end of the second coupling is provided with another drive sprocket, and the multiple chains are respectively wound around four of the drive sprockets and are transmission-connected thereto; a clearance hole for the chain to pass through is opened on the top platform, one end of the chain passes through the clearance hole and is vertically arranged on the inner side of the frame and the lifting frame is arranged at its bottom position, and the other end of the chain passes through the clearance hole and is vertically arranged on the outer side of the frame and is provided with a counterweight block.

[0009] It is further configured as follows: a locking plate is arranged between the commutator and the driving sprocket, a plurality of locking teeth are arranged on the circumferential surface of the locking plate, a connecting plate is slidably installed on the top platform, a locking pin which can be inserted between the locking teeth is arranged on the connecting plate, and a detection switch is also arranged on the connecting plate.

[0010] It is further configured that: a track positioner is provided on at least one lifting frame.

[0011] It is further configured as follows: positioning components corresponding to the track positioner are arranged on the bottom platform and the high-level platform, the track positioner includes a positioning cylinder fixed on the lifting frame, and the telescopic end of the positioning cylinder is arranged horizontally toward the positioning component, and a directional pin is arranged at the telescopic end of the positioning cylinder.

[0012] It is further configured as follows: the positioning assembly includes a positioning frame, which is respectively arranged on the lower surface of the bottom platform and the high-level platform, and four positioning wheels are arranged on one side of the positioning frame close to the lifting frame. The four positioning wheels are arranged in a ring, and positioning holes for positioning by directional pins are formed in the middle of the four positioning wheels.

[0013] It is further configured that: a workpiece stopper is provided on at least one lifting frame.

[0014] It is further configured as follows: the workpiece limiter includes a limit frame installed on the lifting frame, a limit cylinder is installed on the limit frame, the telescopic end of the limit cylinder is arranged upward and connected to the limit pin, a guide cylinder slidably connected to the limit pin is installed on the limit frame, the pin extends upward or retracts along the guide cylinder with the limit cylinder, and a limit hole cooperating with the limit pin is opened on the conveying trolley.

[0015] The invention is further configured as follows: a chain break detection device is arranged between the chain and the lifting frame, and the chain break detection device includes a screw, a connecting block, a sleeve, a spring, a movable plate and a limit switch. The connecting block is fixed on the chain link of the chain, a threaded hole adapted to the screw is provided on the bottom surface of the connecting block, the top end of the screw is threadedly connected to the threaded hole, a sliding hole for the screw to pass through and slidably connected to the screw is provided on the upper surface of the lifting frame, a sliding hole is provided at the bottom end of the screw, and a nut is threadedly connected to the outer surface thereof, and the movable plate It is mounted on the top of the nut, the lower surface of the sleeve is open and mounted on the top of the movable plate, the sleeve is sleeved on the outer surface of the screw, and the top surface of the sleeve is tightly abutted against the lower surface of the lifting frame, the spring is vertically installed inside the sleeve and arranged around the screw, and the bottom end of the spring is connected to the movable plate. Under normal circumstances, the spring is in a compressed state, the limit switch is installed on the lower surface of the lifting frame and is located below the movable plate, and the limit switch is electrically connected to the drive motor to control the opening and closing of the drive motor and is also electrically connected to an alarm.

[0016] Compared with the prior art, the beneficial technical effects of the present invention are:

[0017] 1. The present invention sets the drive on the top platform, sets the drive motor in the middle, transmits power to both sides synchronously through the first coupling, and transmits power to the drive sprockets on the left and right sides through the commutator. Lifting frames and counterweights are set on the left and right sides of the elevator, and the lifting frames and counterweights are connected by chains. The benefit of this invention is that power is transmitted to both sides through the first coupling, thereby ensuring the synchronization of the left and right sides. The chains are driven separately on the left and right sides, the chain length is shortened, and the difficulty of maintaining the elevator is reduced.

[0018] 2. In addition, the design of the locking plate and the locking pin can easily lock the drive sprocket to prevent accidental movement, thereby increasing the safety of operation; the design of the track positioner and the positioning assembly ensures the precise alignment of the load-bearing track on the lifting frame with the high-level platform or the bottom platform, thereby improving the positioning accuracy; the use of the workpiece limiter can fix the conveyor trolley during the lifting or lowering process, ensuring that its relative position with the lifting frame is stable, thereby preventing the workpiece from being displaced or tipped over during transportation; the chain break detection device can promptly trigger an alarm and shut down the machine when the chain breaks. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a front view of the present invention;

[0022] Figure 3 A top view of the present invention;

[0023] Figure 4 is a side view of the present invention;

[0024] Figure 5 for Figure 1 A local enlarged schematic diagram of point A;

[0025] Figure 6 for Figure 1 A local enlarged schematic diagram of point B;

[0026] Figure 7 is a schematic diagram of a locking disk of the present invention;

[0027] Figure 8 is a schematic diagram of a positioning assembly of the present invention;

[0028] Fig. 9 It is a schematic diagram of the matching state of the track positioner and the positioning assembly of the present invention;

[0029] Fig.10 is a schematic diagram of a workpiece stopper of the present invention;

[0030] Fig.11 Schematic diagram of a chain break detection device according to the present invention.

[0031] Reference numerals: 0, conveying trolley; 1, supporting part; 2, top driving device; 3, chain; 4, lifting frame; 5, bearing rail; 6, column; 7, top platform; 8, driving motor; 9, first coupling; 10, commutator; 11, driving sprocket; 12, clearance hole; 13, counterweight; 14, guide wheel; 15, second coupling; 16, locking plate; 17, locking tooth; 18, connecting plate; 19, locking pin; 20. Handle; 21. Detection switch; 22. Track locator; 23. Workpiece limiter; 24. Positioning assembly; 25. Positioning frame; 26. Positioning wheel; 27. Positioning hole; 28. Positioning cylinder; 29. ​​Directing pin; 30. Limit frame; 31. Limit cylinder; 32. Limit pin shaft; 33. Guide cylinder; 34. Screw; 35. Spring; 36. Movable plate; 37. Limit switch; 38. Sleeve; 39. Connecting block. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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.

[0033] In the description of the present invention, 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 invention 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 invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example

[0036] Reference Figure 1-Figure 11 , is a top-driven four-post lift disclosed in the present invention, comprising a support portion 1, a top driving device 2 and a plurality of chains 3;

[0037] In this embodiment, a plurality of chains 3 are provided, and the plurality of chains 3 are vertically arranged in two groups and are symmetrical about the support part 1. The top driving device 2 is installed on the top of the support part 1 and connected with the plurality of chains 3. The top driving device 2 is used to drive the chains 3 for conveying transmission. A lifting frame 4 is connected to the chain 3 on each side. Both lifting frames 4 are provided with bearing rails 5. The bearing rails 5 are used to guide the conveying trolley 0 to move and transport and carry the conveying trolley 0. The bearing rails 5 correspond to the bottom platform and the high-level platform respectively. The bottom platform and the high-level platform are used to lift and interact at the height of the conveying trolley 0.

[0038] Furthermore, the support portion 1 includes four columns 6 symmetrically arranged in pairs, and the four columns 6 form a frame, a top platform 7 is arranged on the top of the frame, and the top drive device 2 is installed on the top platform 7; specifically, the top drive device 2 includes a double-output shaft drive motor 8 fixed in the middle of the top platform 7, and both sides of the output shaft of the drive motor 8 are provided with a first coupling 9, and the two first couplings 9 are installed with a commutator 10 at one end facing away from each other, and the output ends of the two commutators 10 are connected to a locking disk 16, and the other ends of the two locking disks 16 are connected to a driving sprocket 11. The other end of the driving sprocket 11 is connected to a second coupling 15, and the other end of the second coupling 15 is provided with another driving sprocket 11. The multiple chains 3 are respectively wound around four driving sprockets 11 and are transmission-connected thereto; a clearance hole 12 for the chain 3 to pass through is opened on the top platform 7, one end of the chain 3 passes through the clearance hole 12 and is vertically arranged on the inner side of the stand, and the lifting frame 4 is arranged at its bottom position, the other end of the chain 3 passes through the clearance hole 12 and is vertically arranged on the outer side of the stand and is provided with a counterweight block 13, and guide wheels 14 that roll with the column 6 are provided on the counterweight block 13 and the lifting frame 4;

[0039] The driving motor 8 transmits power to both sides simultaneously through the first couplings 9 on both sides, and then transmits the power to the driving sprocket 11 through the commutator 10, so that the driving sprocket 11 rotates, thereby driving the chain 3 to drive the lifting frame 4 to move up and down vertically;

[0040] The present invention adopts a four-column 6 type frame structure, and a top platform 7 is arranged on the top of the frame, so that the structure of the overall frame of the elevator is more stable; the drive motor 8 is arranged in the middle of the top platform 7, and the power is transmitted to both sides through the first coupling 9. The setting of the first coupling 9 reduces the relative installation accuracy requirements between the drive motor 8 and the commutator 10, and at the same time can ensure the synchronization of the rotation of the drive sprockets 11 on both sides. Moreover, such a setting does not require the chain 3 to connect the lifting frames 4 on both sides, which reduces the difficulty of the chain 3 winding and reduces the difficulty of installation and maintenance.

[0041] Furthermore, a plurality of locking teeth 17 are provided on the circumferential surface of the locking disk 16, and a connecting plate 18 is slidably installed on the top platform 7. A locking pin 19 that can be inserted between the locking teeth 17 is provided on the connecting plate 18, and a handle 20 is provided on the connecting plate 18, so that the staff can easily control the sliding of the connecting plate 18 through the handle 20, thereby completing the insertion and withdrawal of the locking pin 19, and a detection switch 21 is provided on the connecting plate 18 to detect the state of the locking pin. Through the design of the locking disk 16 and the locking pin 19, the driving sprocket 11 can be conveniently locked to prevent it from accidentally rotating, thereby increasing the safety of operation.

[0042] Furthermore, a rail locator 22 and a workpiece limiter 23 are provided on at least one lifting frame 4. The rail locator 22 is used to ensure that the load-bearing rail 5 on the lifting frame 4 is aligned and positioned with the high-level platform or the bottom-level platform; the workpiece limiter 23 is used to limit the workpiece after the conveying trolley 0 arrives at the elevator, so as to ensure that the positions of the conveying trolley 0 and the lifting frame 4 are relatively fixed during the lifting or lowering process.

[0043] A positioning assembly 24 is provided on the bottom platform and the high-level platform to cooperate with the track positioner 22. Specifically, the positioning assembly 24 includes a positioning frame 25, which is fixed to the lower surface of the bottom platform and the high-level platform by bolts, and four positioning wheels 26 are provided on one side of the positioning frame 25 close to the lifting frame 4. The four positioning wheels 26 are arranged in a ring, and a positioning hole 27 for positioning the track positioner 22 is formed in the middle of the four positioning wheels 26;

[0044] Specifically, the rail positioner 22 includes a positioning cylinder 28 fixed on the lifting frame 4, and the telescopic end of the positioning cylinder 28 is arranged horizontally toward the positioning hole 27, and a directional pin 29 that can be inserted into the positioning hole 27 is arranged at the telescopic end of the positioning cylinder 28;

[0045] When positioning the load-bearing rail 5 with the lower platform or the higher platform, the positioning cylinder 28 drives the positioning pin to extend and retract. When the positioning pin is extended, it enters the positioning hole 27 formed by the gap of the positioning wheel 26, thereby realizing the positioning of the lifting frame 4. When the positioning pin is retracted, the lifting frame 4 can move up and down freely.

[0046] The workpiece limiter 23 includes a limit frame 30 installed on the lifting frame 4, and the limit frame 30 is set in an L shape. A limit cylinder 31 is installed on the limit frame 30. The telescopic end of the limit cylinder 31 is set upward and connected to a limit pin 32. A guide cylinder 33 slidingly connected to the limit pin 32 is installed on the limit frame 30. The pin extends upward or retracts along the guide cylinder 33 with the limit cylinder 31. A limit hole matching the limit pin 32 is opened on the conveying trolley 0. When the limit pin 32 is extended, it can be extended into the limit hole to limit the conveying trolley 0.

[0047] In another embodiment, the chain 3 may be configured as a toothed belt type belt.

[0048] In another embodiment, a chain break detection device is provided between the chain 3 and the lifting frame 4, and the chain break detection device includes a screw 34, a connecting block 39, a sleeve 38, a spring 35, a movable plate 36 and a limit switch 37, wherein the connecting block 39 is fixed on the link of the chain 3, a threaded hole adapted to the screw 34 is provided on the bottom surface of the connecting block 39, the top end of the screw 34 is threadedly connected to the threaded hole, a sliding hole for the screw 34 to pass through and slidably connected to the screw 34 is provided on the upper surface of the lifting frame 4, a sliding hole is provided at the bottom end of the screw 34, and a nut is threadedly connected to the outer surface thereof, and the movable plate 36 It is mounted on the top of the nut, the lower surface of the sleeve 38 is open and mounted on the top of the movable plate 36, the sleeve 38 is sleeved on the outer surface of the screw 34, and the top surface of the sleeve 38 is tightly abutted against the lower surface of the lifting frame 4, the spring 35 is vertically installed inside the sleeve 38 and is arranged around the screw 34, and the bottom end of the spring 35 is connected to the movable plate 36. Under normal circumstances, the spring 35 is in a compressed state, the limit switch 37 is installed on the lower surface of the lifting frame 4 and is located below the movable plate 36, and the limit switch 37 is electrically connected to the drive motor 8 to control the opening and closing of the drive motor 8 and is also electrically connected to an alarm.

[0049] When the chain 3 is operating normally, the screw rod 34 provides an upward supporting force for the nut, which can overcome the restoring force of the spring 35, ensuring that the sleeve 38 and the movable plate 36 are tightened between the lower surface of the lifting frame 4 and the top of the nut. When the chain 3 is disconnected, the screw rod 34 loses the pulling force of the chain 3, and the nut loses the supporting force supplied to the movable plate 36. Under the action of the elastic potential energy of the spring 35, the movable plate 36 is ejected by the restoring force of the spring 35 and falls before the limit switch 37, thereby triggering the limit switch 37 and completing the alarm shutdown.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Top-driven four-post lift, characterized in that: The invention comprises a support part (1), a top driving device (2) and a chain (3) vertically arranged on the support part (1); the top driving device (2) is installed on the top of the support part (1) and connected to the chain (3); a lifting frame (4) is connected to the chain (3) on each side; the two lifting frames (4) are both provided with a bearing track (5); the top driving device (2) transmits power to the chains (3) on both sides at the same time, so that the chains (3) drive the lifting frames (4) on both sides to rise and fall synchronously.

2. The top-driven four-post lift according to claim 1, characterized in that: The support part (1) comprises a top platform (7) and four columns (6) arranged symmetrically in pairs, the four columns (6) forming a frame, the top platform (7) is arranged on the top of the frame, and the top driving device (2) is installed on the top platform (7).

3. The top-driven four-post lift according to claim 2, characterized in that: The top drive device (2) comprises a drive motor (8) arranged on a top platform (7), a first coupling (9), a commutator (10), a drive sprocket (11), a second coupling (15), and a chain (3), wherein two first couplings (9) are provided and are respectively connected to the output shafts on both sides of the drive motor (8), the commutator (10) is installed at the other end of the two first couplings (9), the drive sprocket (11) is arranged at the output end of the two commutators (10), and the other end of the drive sprocket (11) is connected to the second coupling (15). A second coupling (15), another driving sprocket (11) is arranged at the other end of the second coupling (15), and the plurality of chains (3) are respectively wound around four of the driving sprockets (11) and are transmission-connected thereto; a clearance hole (12) for the chain (3) to pass through is opened on the top platform (7), one end of the chain (3) passes through the clearance hole (12) and is vertically arranged on the inner side of the stand, and the lifting frame (4) is arranged at the bottom thereof, and the other end of the chain (3) passes through the clearance hole (12) and is vertically arranged on the outer side of the stand and is provided with a counterweight (13).

4. The top-driven four-post lift according to claim 3, characterized in that: A locking plate (16) is arranged between the commutator (10) and the driving sprocket (11), and a plurality of locking teeth (17) are arranged on the circumferential surface of the locking plate (16). A connecting plate (18) is slidably mounted on the top platform (7), and a locking pin (19) which can be inserted between the locking teeth (17) is arranged on the connecting plate (18). A detection switch (21) is also arranged on the connecting plate (18).

5. The top-driven four-post lift according to claim 2, characterized in that: The chain (3) can be configured as a belt.

6. The top-driven four-post lift according to claim 5, characterized in that: The lifting frame (4) is provided with a track positioner (22), and positioning components (24) are provided on the bottom platform and the upper platform to cooperate with the track positioner (22). The track positioner (22) includes a positioning cylinder (28) fixed on the lifting frame (4), and the telescopic end of the positioning cylinder (28) is arranged horizontally toward the positioning component (24), and a directional pin (29) is arranged at the telescopic end of the positioning cylinder (28).

7. The top-driven four-post lift according to claim 6, characterized in that: The positioning assembly (24) comprises a positioning frame (25), wherein the positioning frame (25) is respectively arranged on the lower surface of the bottom platform and the upper platform, and four positioning wheels (26) are arranged on one side of the positioning frame (25) close to the lifting frame (4), wherein the four positioning wheels (26) are arranged in a ring, and a positioning hole (27) for positioning a directional pin (29) is formed in the middle of the four positioning wheels (26).

8. The top-driven four-post lift according to claim 2, characterized in that: At least one lifting frame (4) is provided with a workpiece stopper (23).

9. The top-driven four-post lift according to claim 8, characterized in that: The workpiece limiter (23) comprises a limit frame (30) mounted on a lifting frame (4), a limit cylinder (31) being mounted on the limit frame (30), a telescopic end of the limit cylinder (31) being arranged upwardly and connected to a limit pin (32), a guide cylinder (33) being mounted on the limit frame (30) and being slidably connected to the limit pin (32), the pin extending upwardly or retracting along the guide cylinder (33) along with the limit cylinder (31), and a limit hole cooperating with the limit pin (32) being opened on the conveying trolley (0).

10. The top-driven four-post lift according to claim 1, characterized in that: A chain break detection device is provided between the chain (3) and the lifting frame (4), and the chain break detection device comprises a screw rod (34), a connecting block (39), a sleeve (38), a spring (35), a movable plate (36) and a limit switch (37). The connecting block (39) is fixed on the link of the chain (3). A threaded hole matching the screw rod (34) is provided on the bottom surface of the connecting block (39). The top end of the screw rod (34) is threadedly connected to the threaded hole. A sliding hole for the screw rod (34) to pass through and slidably connected to the screw rod (34) is provided on the upper surface of the lifting frame (4). The bottom end of the screw rod (34) is provided with a sliding hole, and a nut is threadedly connected to the outer surface of the screw rod. The movable plate (36) is mounted on the lifting frame (4). At the top of the nut, the lower surface of the sleeve (38) is open and is placed on the top of the movable plate (36). The sleeve (38) is placed on the outer surface of the screw rod (34), and the top surface of the sleeve (38) is tightly abutted against the lower surface of the lifting frame (4). The spring (35) is vertically installed inside the sleeve (38) and is arranged around the screw rod (34). The bottom end of the spring (35) is connected to the movable plate (36). Under normal circumstances, the spring (35) is in a compressed state. The limit switch (37) is installed on the lower surface of the lifting frame (4) and is located below the movable plate (36). The limit switch (37) is electrically connected to the drive motor (8) to control the opening and closing of the drive motor (8) and is also electrically connected to an alarm.

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