Electric driving device of tower crane
By designing support booms and support frames on tower cranes, combined with counterbalance bars and support wheels, the problems of friction and electric drive load during the movement of the luffing trolley were solved, thereby improving service life and lifting stability.
Patent Information
- Application Number
- CN202520401667.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-07
AI Technical Summary
When the luffing trolley moves on the tower crane, the friction increases, which leads to increased load and wear on the electric drive mechanism, affecting its service life.
It adopts a support arm and support boom design, combined with a stabilizer bar, pivot, cam bar and motor. The balance bar tilt adjustment reduces friction, and the support wheels and movable parts stabilize the frame, reducing electric drive load and friction.
This reduces the electric drive load and friction during the movement of the luffing trolley, extends its service life, and ensures the stability of the hoisting operation.
Smart Images
Figure CN223823254U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of crane electric drive auxiliary, especially tower crane electric drive device. BACKGROUND
[0002] The amplitude car is installed on the tower crane jib and is used for realizing the movement of the hook device on the jib, and in actual use, the amplitude car reciprocates on the jib under the traction of the driving device, so as to move the hoisting hook to the specified position, so that the hoisting hook can be aligned with the object to be hoisted, so as to carry out the hoisting work.
[0003] When the amplitude car on the jib moves position after hoisting the object, the pressure on the car increases, the friction between the guide wheel on the amplitude car and the jib also increases, the load required by the electric drive mechanism of the amplitude car increases, and the friction and loss between the amplitude car and the jib also increase, which affects the service life. UTILITY MODEL CONTENT
[0004] In view of the deficiencies in the prior art, the utility model aims to provide a tower crane electric drive device to solve the technical problems mentioned in the background.
[0005] The above technical purpose of the utility model is realized by the following technical scheme:
[0006] The tower crane electric drive device comprises two support arm rods and a support arm frame, the support arm frame is fixedly connected to the top sides of the two support arm rods, rectangular grooves are formed in the top sides of the two support arm rods, an auxiliary part is arranged at the bottom of the rectangular groove, and a vehicle frame is connected to the lower part of the two support arm rods through a moving part.
[0007] The auxiliary part comprises a central shaft, a balance rod, a rotating shaft, two protruding rods and a motor, the central shaft is fixedly connected to the middle part of the rectangular groove, the balance rod is rotatably connected to the outer circumferential side of the central shaft, the rotating shaft is rotatably connected between the opposite two side walls of the rectangular groove and is located below the balance rod, the two protruding rods are respectively connected to the outer circumferential sides of the two ends of the rotating shaft, the motor is fixedly connected to the end of the corresponding support arm rod, and the output end of the motor is connected with the rotating shaft.
[0008] The utility model discloses a further configuration in a preferable example can be: the moving piece includes two groups of support wheel, the number of each group support wheel is three, two groups of support wheel are placed in two rectangular recesses respectively, and the side of each support wheel is connected with support shaft, and the end of corresponding three support shafts is jointly connected with a support plate, and the side, away from support wheel of support plate is connected with movable part.
[0009] The utility model discloses a further configuration in a preferable example can be: the movable part includes movable axle, and the movable axle is rotatably connected on the side, away from support wheel of support plate, and the end of movable axle is fixedly connected with fixed plate, and the frame is fixedly connected on the bottom side of two fixed plates, and the outer circumferential side of movable axle is also connected with balance piece.
[0010] The utility model discloses a further configuration in a preferable example can be: the balance piece includes bearing rod, and the bearing rod is L-shaped arrangement, and the end of the bottom side of bearing rod is rotatably connected with balance wheel, and the support arm rod is set up with the balance groove corresponding with balance wheel, and the outer circumferential side of balance wheel is located in balance groove.
[0011] The utility model discloses a further configuration in a preferable example can be: two convex rods are respectively close to the opposite two inner side walls in rectangular recess on the pivot, and the outer side wall of two convex rods is all attached to the bottom side of balance rod.
[0012] The utility model discloses a further configuration in a preferable example can be: the outer circumferential side of support wheel is attached to the bottom side wall of balance rod, and the outer circumferential side of support shaft and the top side wall of support arm rod leave the gap.
[0013] Summarized above, the utility model discloses at least one of following beneficial technical effect:
[0014] 1. The tower crane electric drive device, when using, utilizes the balance rod to make corresponding inclination according to the direction of the luffing trolley movement, so that the luffing trolley reduces the load of the electric drive part when moving, reduces the loss, and reduces the friction force when moving, so that the service life of the luffing trolley is improved.
[0015] 2. The tower crane electric drive device, the support wheel can rotate in the rectangular recess, so that the movement of the frame is driven by the movable part, and when the balance rod is inclined, the whole support plate is inclined with the inclination of the balance rod, and the movable part is used to stabilize the frame to avoid inclination, so that the friction force of the support wheel can be reduced when moving, and the service life is improved.
[0016] 3. In this tower crane's electric drive unit, the movable shaft and the support plate are rotatably connected, see reference. Figure 1 The fixed plate is fixedly connected to the movable shaft. When the support plate tilts with the tilt of the balance bar, the movable shaft is prevented from rotating by the balance component, thus preventing the frame from tilting. This ensures that the lifting hook will not tilt during lifting, thereby affecting the lifting of objects.
[0017] 4. In the electric drive device of this tower crane, the load-bearing rod in the balance component is fixedly connected to the movable shaft. The bottom end of the load-bearing rod is rotatably connected to the balance wheel. The balance wheel is inserted into the balance groove and is rotatably connected in the balance groove. The balance wheel is restricted by the inner side wall of the balance groove to prevent circumferential motion, thereby restricting the load-bearing rod to prevent rotation, so as to ensure that the movable shaft does not rotate and thus tilts with the support plate, so that the frame can always remain in a horizontal state and avoid affecting the tilting of the lifting hook during the lifting operation. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the overall structure of the electric drive device for the tower crane of this utility model.
[0020] Figure 2 This is a schematic diagram of the moving component structure of the electric drive device for a tower crane according to this utility model.
[0021] Figure 3 This is a schematic diagram of the auxiliary components of the electric drive device for a tower crane according to this utility model.
[0022] Figure 4 This is a schematic diagram of the protruding rod structure of the electric drive device for a tower crane according to this utility model.
[0023] In the diagram, 1. Support arm; 2. Support boom; 3. Rectangular groove; 4. Auxiliary component; 5. Frame; 6. Moving component; 7. Central shaft; 8. Balance bar; 9. Rotary shaft; 10. Protruding rod; 11. Motor; 12. Support wheel; 13. Support shaft; 14. Support plate; 15. Movable part; 16. Movable shaft; 17. Fixed plate; 18. Balance component; 19. Bearing rod; 20. Balance wheel; 21. Balance groove. Detailed Implementation
[0024] The present invention will be further described in detail below with reference to the accompanying drawings.
[0025] Embodiment:
[0026] With reference to Figure 1 and Figures 3-4 The utility model discloses a tower crane electric drive arrangement, including two support arm pole 1 and support arm frame 2, support arm frame 2 fixed connection in two support arm pole 1's top side, two support arm pole 1's top side all set up with rectangular recess 3, the inside bottom of rectangular recess 3 is provided with auxiliary 4, and the below of two support arm pole 1 is connected with the frame 5 through the moving part 6,
[0027] Auxiliary 4 includes center shaft 7, balance lever 8, pivot 9, two male rod 10 and motor 11, center shaft 7 fixed connection in the inside middle part of rectangular recess 3, balance lever 8 rotation is connected on the outer circumferential side of center shaft 7, pivot 9 rotation is connected between the opposite two side walls in rectangular recess 3, and located the below of balance lever 8, two male rod 10 are connected on the outer circumferential side of pivot 9 both ends respectively, motor 11 fixed connection in corresponding support arm pole 1's end, and the output of motor 11 is connected with pivot 9.
[0028] In this embodiment, with reference to Figure 1 Support arm pole 1 and support arm frame 2 in the middle form the support arm, and the frame 5 is slidably connected with two rectangular recesses 3 by the moving part 6, when the frame 5 moves by the electric drive mechanism of prior art,
[0029] With reference to Figure 1 When the frame 5 moves away from the motor 11, with reference to Figure 3 and Figure 4 The motor 11, the motor 11 rotates clockwise, the motor 11 will drive the pivot 9 to rotate clockwise when rotating clockwise, and then drive the two male rods 10 to rotate clockwise, at this time, the male rod 10 close to the motor 11 will push the balance lever 8 to rotate on the center shaft 7 upwards, and then make the end of the balance lever 8 close to the motor 11 upwards, and make the balance lever 8 downwards inclined away from the motor 11, at this time, the moving part 6 will incline with the balance lever 8, and then can slide by its own gravity, cooperate with the driving mechanism of the frame 5 itself, can move, reduce the load of the electric drive mechanism and the friction force received by the moving part 6, achieve the reduction of the loss of the moving part 6 and the electric drive mechanism of the frame 5 itself and improve the service life;
[0030] With reference to Figure 1 If the frame 5 moves close to the motor 11, with reference to Figure 3 and Figure 4The motor 11 rotates counterclockwise, causing the shaft 9 to rotate counterclockwise. This causes the protruding rod 10, which is away from the motor 11, to rotate counterclockwise, thereby causing the end of the balance bar 8 away from the motor 11 to rotate. This causes the side of the balance bar 8 away from the motor 11 to tilt upwards, reducing the wear and tear on the electric drive mechanism and friction on the moving part 6 when the frame 5 moves towards the motor 11 using the moving part 6, thus improving its service life.
[0031] In a further preferred embodiment of this utility model, such as Figure 2 As shown, the movable component 6 includes two sets of support wheels 12, each set of support wheels 12 having three wheels. The two sets of support wheels 12 are respectively placed in the two rectangular grooves 3. Each support wheel 12 is connected to a support shaft 13 on its side. The ends of the three corresponding support shafts 13 are connected to a support plate 14. The side of the support plate 14 away from the support wheel 12 is connected to a movable part 15.
[0032] In this embodiment, reference Figure 2 The support wheel 12 can rotate within the rectangular groove 3, thereby driving the frame 5 to move via the movable part 15. When the balance bar 8 tilts, the entire support plate 14 tilts along with the balance bar 8, working with the movable part 15 to stabilize the frame 5 and prevent it from tilting. This, in conjunction with the auxiliary part 4, reduces the friction of the support wheel 12 during movement, thereby reducing its wear and tear and increasing its service life.
[0033] In a further preferred embodiment of this utility model, such as Figure 2 As shown, the movable part 15 includes a movable shaft 16, which is rotatably connected to the side of the support plate 14 away from the support wheel 12. A fixing plate 17 is fixedly connected to the end of the movable shaft 16. The frame 5 is fixedly connected to the bottom side of the two fixing plates 17. A balance member 18 is also connected to the outer periphery of the movable shaft 16.
[0034] In this embodiment, reference Figure 2 The movable shaft 16 is rotatably connected to the support plate 14. (See reference) Figure 1 The fixed plate 17 is fixedly connected to the movable shaft 16. When the support plate 14 tilts with the tilt of the balance bar 8, the movable shaft 16 is prevented from rotating by the balance component 18, thereby preventing the frame 5 from tilting, so as to ensure that the lifting hook tilts during hoisting, thus affecting the hoisting of objects.
[0035] In a further preferred embodiment of this utility model, such as Figure 2As shown, the balancing component 18 includes a support rod 19, which is L-shaped. A balance wheel 20 is rotatably connected to the bottom end of the support rod 19. A balance groove 21 corresponding to the balance wheel 20 is provided on the support arm 1, and the outer periphery of the balance wheel 20 is located in the balance groove 21.
[0036] In this embodiment, reference Figure 2 The balance component 18 has a support rod 19 fixedly connected to the movable shaft 16. The bottom end of the support rod 19 is rotatably connected to the balance wheel 20. The balance wheel 20 is inserted into the balance groove 21 and is rotatably connected within the balance groove 21. The balance wheel 20 is restricted by the inner side wall of the balance groove 21 to prevent circumferential movement, thereby restricting the support rod 19 to prevent rotation, so as to ensure that the movable shaft 16 does not rotate and thus tilts with the support plate 14, so that the frame 5 can always remain in a horizontal state and avoid affecting the tilting of the lifting hook during the lifting operation.
[0037] In a further preferred embodiment of this utility model, such as Figures 3-4 As shown, the two protruding rods 10 are respectively close to the two inner sidewalls of the rectangular groove 3 on the rotating shaft 9, and the outer sidewalls of the two protruding rods 10 are attached to the bottom side of the balance bar 8.
[0038] In this embodiment, reference Figure 4 The protrusion 10 and Figure 3 The rectangular groove 3 has two protruding rods 10 that are close to the two opposite inner walls of the rectangular groove 3. When the motor 11 drives the rotating shaft 9 to rotate counterclockwise and clockwise, the balance bar 8 rotates in two different directions on the central shaft 7. This facilitates the movement of the moving part 6, reduces the friction of the moving part 6 and the load on the electric drive mechanism of the frame 5, and improves its service life.
[0039] In a further preferred embodiment of this utility model, such as Figures 2-3 As shown, the outer periphery of the support wheel 12 is in contact with the bottom side wall of the balance bar 8, and there is a gap between the outer periphery of the support shaft 13 and the top side wall of the support arm 1.
[0040] In this embodiment, reference Figure 2 The support wheel 12 and Figure 3 The top side wall of the balance bar 8 is in contact with the outer periphery of the support wheel 12, and there is air between the outer periphery of the support shaft 13 and the support arm 1, so that the support wheel 12 is always in contact with the balance bar 8. When the balance bar 8 is tilted, the support plate 14 can tilt along with the balance bar 8, allowing the support wheel 12 to roll along with the tilt of the balance bar 8, reducing the friction force on the support wheel 12, and at the same time reducing the drive load on the electric drive mechanism of the frame 5, thus improving its service life.
[0041] The implementation principle of the above embodiment is as follows: When the frame 5 moves away from the motor 11, the motor 11 rotates clockwise. When the motor 11 rotates clockwise, it will drive the rotating shaft 9 to rotate clockwise, which in turn will drive the two protruding rods 10 to rotate clockwise. At this time, the protruding rod 10 near the motor 11 will push the balance bar 8 to rotate on the central shaft 7, so that the end of the balance bar 8 near the motor 11 faces upward and the balance bar 8 tilts downward away from the motor 11. At this time, the moving part 6 will tilt with the balance bar 8, and can slide by its own gravity. In conjunction with the drive mechanism of the frame 5, it can move, reducing the load on the electric drive mechanism and reducing the friction force on the moving part 6, thereby reducing the wear and tear on the moving part 6 and the electric drive mechanism of the frame 5 and improving its service life.
[0042] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.
Claims
1. An electric drive unit for a tower crane, comprising two support booms and a support boom frame, wherein the support boom frame is fixedly connected to the top sides of the two support booms, characterized in that, A rectangular groove is provided on the top side of each of the two support arms, and an auxiliary component is provided on the bottom side of the rectangular groove. The frame is connected to the bottom of the two support arms through a movable component. The auxiliary component includes a central shaft, a balance bar, a rotating shaft, two protruding rods, and a motor. The central shaft is fixedly connected to the center of the rectangular groove. The balance bar is rotatably connected to the outer periphery of the central shaft. The rotating shaft is rotatably connected between two opposite side walls within the rectangular groove and is located below the balance bar. The two protruding rods are respectively connected to the outer periphery of both ends of the rotating shaft. The motor is fixedly connected to the end of the corresponding support arm, and the output end of the motor is connected to the rotating shaft.
2. The electric drive device for tower cranes according to claim 1, characterized in that, The movable component includes two sets of support wheels, each set containing three support wheels. The two sets of support wheels are respectively placed in two rectangular grooves. Each support wheel is connected to a support shaft on its side. The ends of the three support shafts are connected to a support plate. The side of the support plate away from the support wheel is connected to a movable part.
3. The electric drive device for tower cranes according to claim 2, characterized in that, The movable part includes a movable shaft, which is rotatably connected to the side of the support plate away from the support wheel. A fixed plate is fixedly connected to the end of the movable shaft. The frame is fixedly connected to the bottom side of the two fixed plates. A balance component is also connected to the outer periphery of the movable shaft.
4. The electric drive device for tower cranes according to claim 3, characterized in that, The balancing component includes a support rod, which is L-shaped. A balance wheel is rotatably connected to the bottom end of the support rod. A balance groove corresponding to the balance wheel is provided on the support arm, and the outer periphery of the balance wheel is located in the balance groove.
5. The electric drive device for tower cranes according to claim 4, characterized in that, The two protruding rods are respectively close to the two inner sidewalls of the rectangular groove on the rotating shaft, and the outer sidewalls of the two protruding rods are in contact with the bottom side of the balance bar.
6. The electric drive device for a tower crane according to claim 5, characterized in that, The outer periphery of the support wheel is in contact with the bottom side wall of the balance bar, and there is a gap between the outer periphery of the support shaft and the top side wall of the support arm.