Driving device for cantilever crane

Abstract

The utility model relates to the technical field of cantilever cranes, in particular to a driving device for a cantilever crane, which comprises a driving mechanism and a locking mechanism, the driving mechanism comprises a driving gear, a first seat plate and two motor driving groups, each motor driving group comprises a first motor and a speed reducer which are arranged on the first seat plate, an output shaft of the first motor is fixedly connected with an input shaft of the speed reducer, an output shaft of the speed reducer is fixedly connected with a driving gear, a rotating gear is rotationally arranged on the stand column, and the rotating gear is meshed with the driving gear; the locking mechanism comprises a second seat plate, two locking air cylinders and locking blocks, the second seat plate is arranged on the stand column, the two locking air cylinders are oppositely arranged on the second seat plate, a telescopic rod of each locking air cylinder is fixedly connected with the corresponding locking block, and the rotating arm is located between the two locking blocks. According to the driving device for the cantilever crane, disclosed by the utility model, a single-motor speed reducer transmission mode of the existing cantilever crane is replaced by the two motor driving groups.

Description

Technical Field

[0001] The utility model relates to the technical field of cantilever cranes, in particular to a driving device for cantilever cranes. Background Art

[0002] Cantilever crane is an industrial component, which is a light-duty crane. It consists of a column, a slewing arm slewing drive device and an electric hoist. It has the advantages of light weight, large span, large lifting capacity, economy and durability. In daily production, cantilever cranes are often used to lift heavy objects.

[0003] The existing cantilever crane will have the following problems when in use: First, the cantilever crane uses a single motor reducer gear transmission to drive the swing arm to rotate. The gears are often damaged due to excessive force on the gears during the instantaneous start-up process, which in turn causes the reducer to be damaged during the rotation process. The reducer needs to be replaced frequently, which affects production; second, since the cantilever crane has no locking structure, the swing arm cannot be locked when the cantilever crane is not in use, thereby being unable to prevent the swing arm from rotating and moving due to external interference, causing it to interfere with the electric hoist and external equipment, thereby causing damage. Therefore, a cantilever crane drive device is urgently needed to solve the above problems. Utility Model Content

[0004] In order to solve the technical problems that the reducer gears of the existing cantilever crane are often damaged and the cantilever crane has no locking structure and is easily damaged, the utility model provides a drive device for a cantilever crane, which uses two motor drive groups to replace the single motor reducer transmission mode of the existing cantilever crane; at the same time, a locking block is designed to keep the swing arm fixed when it is not rotating.

[0005] The utility model provides a driving device for a cantilever crane, the cantilever crane comprises a column and a swivel arm rotatably arranged on the column, the driving device comprises a driving mechanism and a locking mechanism, the driving mechanism comprises a driving gear, a first seat plate and two motor drive groups, the first seat plate is arranged on the swivel arm, each of the motor drive groups comprises a first motor and a reducer arranged on the first seat plate, the output shaft of the first motor is fixedly connected to the input shaft of the reducer, the output shaft of the reducer is fixedly connected to the driving gear, a rotating gear is rotatably arranged on the column, and the rotating gear and the driving gear are meshed; the locking mechanism comprises a second seat plate, two locking cylinders and a locking block, the second seat plate is arranged on the column, the two locking cylinders are relatively arranged on the second seat plate, the telescopic rod of each locking cylinder is fixedly connected to the locking block, and the swivel arm is located between the two locking blocks. When the swivel arm is to be rotated according to demand, the two locking cylinders are started to drive the two locking blocks away from the swivel arm. The two first motors and the reducer are started to drive the driving gear, thereby rotating the rotating gear meshed with the driving gear, and finally realizing the rotation of the swivel arm on the column.

[0006] Furthermore, the locking mechanism also includes a clamping cylinder and a clamping plate, the clamping cylinder is arranged on the second seat plate, the telescopic rod of the clamping cylinder is fixedly connected to the clamping plate, one of the locking blocks is provided with a first groove, and the other locking block is provided with a second groove at a position corresponding to the first groove, the clamping plate can be inserted into the first groove and the second groove and the swing arm is located on the side of the clamping plate.

[0007] Furthermore, the locking mechanism also includes a lifting motor and a clamping block. A screw seat is provided on the column, the screw seat is rotatably connected to the screw and the screw is located on the side of the rotating gear. The lifting motor is provided on the column, the lifting motor is fixedly connected to the screw through a coupling, a nut seat is threadedly connected to the screw, the nut seat is fixedly connected to the clamping block, and the clamping block is located on the side of the rotating gear.

[0008] Furthermore, the clamping block is also provided with a fixing plate, the fixing plate is provided with a fixing hole, the rotating gear is provided with a through hole, and the through hole and the fixing hole are fixedly connected by a pin. The rotating gear is rotated on the column by a rotating bearing. After the fixing plate and the rotating gear are fixedly connected by the pin, the rotating gear is further kept stable to prevent the rotating gear from rotating due to external interference.

[0009] Furthermore, a rotary bearing is provided on the column, and the rotary gear is fixedly connected to the rotary bearing.

[0010] Furthermore, a protruding column is provided on the top of the column, a fixing groove is provided in the protruding column, a first bearing is provided in the fixing groove, a fixing column is provided on the swing arm, the fixing column extends into the fixing groove and is rotatably connected with the first bearing. The fixing groove avoids the position of the fixing column, and the fixing column rotates through the first bearing in the fixing groove, and finally the swing arm rotates on the column.

[0011] Compared with the prior art, the utility model has the following technical effects:

[0012] The drive device of the utility model uses two motor drive groups to replace the single motor reducer transmission mode of the existing cantilever crane, which is not easy to twist the drive gear, and the service life of the drive gear is improved, and there is no need to frequently replace the reducer. At the same time, a locking block is designed, and the two locking blocks fix the swing arm between the two, so that the swing arm remains fixed when it is not rotating, effectively preventing the swing arm from rotating due to external interference and moving, causing it to interfere with the electric hoist on the cantilever crane and external equipment, thereby causing damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a cantilever crane driving device of the utility model;

[0014] Figure 2 It is a structural schematic diagram of two reducers of the utility model;

[0015] Figure 3 It is a rear view structural schematic diagram of the clamping plate of the utility model;

[0016] Figure 4 It is a front view structural schematic diagram of the clamping block of the utility model;

[0017] Figure 5 It is a schematic cross-sectional structure diagram of the fixed column and the raised column of the utility model;

[0018] The reference numerals in the accompanying drawings are:

[0019] 1. Column; 11. Rotating gear; 12. Screw; 13. Raised column;

[0020] 2. Swing arm; 21. Fixed column;

[0021] 3. Driving mechanism; 31. Driving gear; 32. First seat plate; 33. First motor; 34. Speed ​​reducer;

[0022] 4. Locking mechanism; 41. Second seat plate; 42. Locking cylinder; 43. Locking block; 44. Clamping cylinder; 45. Clamping plate; 46. Lifting motor; 47. Clamping block. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0024] like Figures 1 to 5As shown, a driving device for a cantilever crane, the cantilever crane includes a column 1 and a swivel arm 2 rotatably arranged on the column 1, the swivel arm 2 can rotate circumferentially around the center of the column 1, the driving device includes a driving mechanism 3 and a locking mechanism 4, the driving mechanism 3 includes a driving gear 31, a first seat plate 32 and two motor drive groups, the first seat plate 32 is arranged on the swivel arm 2, each of the motor drive groups includes a first motor 33 and a reducer 34 arranged on the first seat plate 32, the output shaft of the first motor 33 is connected to the input shaft of the reducer 34 The shaft is fixedly connected, the output shaft of the reducer 34 is fixedly connected to the driving gear 31, and a rotating gear 11 is rotatably arranged on the column 1, and the rotating gear 11 is meshed with the driving gear 31; the locking mechanism 4 includes a second seat plate 41, two locking cylinders 42 and a locking block 43, the second seat plate 41 is arranged on the column 1, and the two locking cylinders 42 are relatively arranged on the second seat plate 41, and the telescopic rod of each locking cylinder 42 is fixedly connected to the locking block 43, and the swing arm 2 is located between the two locking blocks 43. Among them, the second seat plate 41 includes a standing seat and two fixed plates relatively arranged on the standing seat, the standing seat is fixedly arranged on the column 1 and is located at the rear side of the column 1, the two fixed plates are located on the side of the column 1, and the two locking cylinders 42 are respectively arranged on the two fixed plates and are opposite.

[0025] When the swing arm 2 is to be rotated as required, the two locking cylinders 42 are started, driving the two locking blocks 43 away from the swing arm 2. The two first motors 33 and the reducer 34 are started, driving the drive gear 31, thereby rotating the rotating gear 11 meshing with the drive gear 31, and finally realizing the rotation of the swing arm 2 on the column 1. The two motor drive groups replace the single motor reducer 34 transmission mode of the existing cantilever crane. The dual motor setting is not easy to twist the drive gear 31, the service life of the drive gear 31 is increased, and the reducer 34 does not need to be replaced frequently.

[0026] When the swing arm 2 does not need to rotate as required, the two first motors 33 and the reducer 34 are turned off, and the two locking cylinders 42 are started, driving the two locking blocks 43 to move relative to each other. The two locking blocks 43 fix the swing arm 2 therebetween, effectively preventing the swing arm 2 from rotating due to external interference, causing the swing arm 2 and the electric hoist on the cantilever crane to interfere with and scrape external equipment, thereby causing damage.

[0027] The driving device of this embodiment uses two motor drive groups to replace the single motor reducer 34 transmission mode of the existing cantilever crane, which is not easy to twist the driving gear 31, and the service life of the driving gear 31 is improved, and there is no need to frequently replace the reducer 34. At the same time, the locking block 43 is designed, and the two locking blocks 43 fix the swing arm 2 between them, so that the swing arm 2 remains fixed when it is not rotating, effectively preventing the swing arm 2 from rotating and moving due to external interference, causing it to interfere with the electric hoist on the cantilever crane and external equipment, thereby causing damage.

[0028] As an implementation method, the locking mechanism 4 further includes a clamping cylinder 44 and a clamping plate 45. The clamping cylinder 44 is arranged on the second seat plate 41, and specifically, the clamping cylinder 44 is arranged on the standing seat. The telescopic rod of the clamping cylinder 44 is fixedly connected to the clamping plate 45. A first slot is arranged on one of the locking blocks 43, and a second slot is arranged at a position corresponding to the first slot on the other locking block 43. The clamping plate 45 can be inserted into the first slot and the second slot, and the swing arm 2 is located on the side of the clamping plate 45. When the two locking blocks 43 fix the swing arm 2 between them, the clamping cylinder 44 is also started, so that the clamping plate 45 is inserted into the first slot and the second slot, and the swing arm 2 is located on the side of the clamping plate 45, so that the two locking blocks 43 further clamp the swing arm 2, and the clamping plate 45 also contacts the swing arm 2 and further stabilizes it.

[0029] As an implementable embodiment, the locking mechanism 4 also includes a lifting motor 46 and a clamping block 47. A screw seat is provided on the column 1, and the screw seat is rotationally connected to the screw 12 and the screw 12 is located on the side of the rotating gear 11. The way in which the screw seat is rotationally connected to the screw 12 is the prior art and will not be explained in detail here. The lifting motor 46 is provided on the column 1, and the lifting motor 46 is fixedly connected to the screw 12 through a coupling. A nut seat is threadedly connected to the screw 12, and the nut seat is fixedly connected to the clamping block 47. The clamping block 47 is located on the side of the rotating gear 11. When the two locking blocks 43 fix the swing arm 2 between them, the lifting motor 46 is also started, driving the screw rod 12 to rotate. Since the screw rod 12 and the nut seat are threaded together, the nut seat is driven to move upward on the screw rod 12. After the nut seat moves, the clamping block 47 fixedly connected to the nut seat moves to the side of the rotating gear 11 and contacts it. The clamping block 47 will press the rotating gear 11 to keep the rotating gear 11 stable, preventing the rotating gear 11 from rotating and moving due to external interference, thereby causing the swing arm 2 to move. When the swing arm 2 is to be rotated according to demand, the clamping block 47 does not work and does not affect the rotation of the swing arm 2.

[0030] As an implementation method, the clamping block 47 is further provided with a fixing plate, the fixing plate is provided with a fixing hole, the rotating gear 11 is provided with a through hole, and the through hole and the fixing hole are fixedly connected by a pin. After the fixing plate and the rotating gear 11 are fixedly connected by the pin, the rotating gear 11 is further kept stable to prevent the rotating gear 11 from rotating due to external interference.

[0031] As an implementation method, a rotary bearing is provided on the column 1, and the rotary gear 11 is fixedly connected to the rotary bearing. The rotary gear 11 rotates on the column 1 through the rotary bearing.

[0032] As an implementation method, a protruding column 13 is provided on the top of the column 1, a fixing groove is provided in the protruding column 13, a first bearing is provided in the fixing groove, and a fixing column 21 is provided on the swing arm 2, the fixing column 21 extends into the fixing groove and is rotatably connected with the first bearing. The fixing groove avoids the position of the fixing column 21, and the fixing column 21 is rotated by the first bearing in the fixing groove, and finally the swing arm 2 is rotated on the column 1.

[0033] The embodiments described above are only preferred embodiments of the present invention and are only used to explain the present invention, not to limit the scope of implementation of the present invention. For those skilled in the art, other implementation methods can certainly be easily made by replacement or modification based on the technical contents disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A driving device for a cantilever crane, the cantilever crane comprising a column (1) and a swivel arm (2) rotatably arranged on the column (1), characterized in that: The driving device comprises a driving mechanism (3) and a locking mechanism (4); the driving mechanism (3) comprises a driving gear (31), a first seat plate (32) and two motor driving groups; the first seat plate (32) is arranged on the swing arm (2); each of the motor driving groups comprises a first motor (33) and a reducer (34) arranged on the first seat plate (32); the output shaft of the first motor (33) is fixedly connected to the input shaft of the reducer (34); the output shaft of the reducer (34) is fixedly connected to the driving gear (31); a rotating gear (11) is rotatably arranged on the column (1); the rotating gear (11) and the driving gear (31) are meshed with each other; The locking mechanism (4) comprises a second seat plate (41), two locking cylinders (42) and a locking block (43); the second seat plate (41) is arranged on the column (1); the two locking cylinders (42) are arranged on the second seat plate (41) opposite to each other; the telescopic rod of each locking cylinder (42) is fixedly connected to the locking block (43); and the rotary arm (2) is located between the two locking blocks (43).

2. The driving device according to claim 1, characterized in that: The locking mechanism (4) further comprises a clamping cylinder (44) and a clamping plate (45), wherein the clamping cylinder (44) is arranged on the second seat plate (41), and the telescopic rod of the clamping cylinder (44) is fixedly connected to the clamping plate (45), wherein a first slot is arranged on one of the locking blocks (43), and a second slot is arranged on the other locking block (43) at a position corresponding to the first slot, and the clamping plate (45) is inserted into the first slot and the second slot, and the swing arm (2) is located on the side of the clamping plate (45).

3. The driving device according to claim 1, characterized in that: The locking mechanism (4) further comprises a lifting motor (46) and a clamping block (47); a screw seat is arranged on the column (1); the screw seat is rotatably connected to the screw (12); the screw (12) is located to the side of the rotating gear (11); the lifting motor (46) is arranged on the column (1); the lifting motor (46) is fixedly connected to the screw (12) via a coupling; a nut seat is threadedly connected to the screw (12); the nut seat is fixedly connected to the clamping block (47); and the clamping block (47) is located to the side of the rotating gear (11).

4. The driving device according to claim 3, characterized in that: The clamping block (47) is also provided with a fixing plate, the fixing plate is provided with a fixing hole, the rotating gear (11) is provided with a through hole, and the through hole and the fixing hole are fixedly connected via a pin shaft.

5. The driving device according to claim 1, characterized in that: A rotary bearing is provided on the column (1), and the rotary gear (11) is fixedly connected to the rotary bearing.

6. The driving device according to claim 1, characterized in that: A raised column (13) is provided on the top of the column (1), a fixed groove is provided in the raised column (13), a first bearing is provided in the fixed groove, and a fixed column (21) is provided on the swing arm (2), the fixed column (21) extends into the fixed groove and is rotatably connected to the first bearing.

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