Planetary gear mechanism for a crane

Abstract

The utility model relates to the technical field of hoist, concretely relates to a planet operation mechanism of hoist, including trolley moving frame, the both ends of trolley moving frame are provided with through -hole, two sliding blocks are slidably connected in through -hole, be equipped with adjusting mechanism between two sliding blocks, the bottom surface of four sliding blocks all is fixedly connected with gyro wheel frame, two gyro wheel frames all are rotatably connected with spline sleeve on, spline sleeve coaxially fixed has driving roller, the bottom surface of trolley moving frame is rotatably connected with the spline shaft corresponding with spline sleeve, and the trolley moving frame is installed with motor, and the output shaft of motor is through corner planet reducer and T type steering ware and two spline shaft transmission connection. The utility model drives two spline shafts to rotate through corner planet reducer and T type steering ware of single motor, reduces the occurrence of the problem of gnawing rail caused by driving out of sync from power source, thereby can reduce the wear and tear of wheel and track, prolong the life of trolley operation mechanism, reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, specifically to a planetary running mechanism for a crane. Background Technology

[0002] Cranes, as an important material handling equipment, are widely used in factories, ports, warehouses and other places. Among them, the trolley traveling mechanism of bridge cranes and gantry cranes is the key component for achieving precise positioning of the hoisted object.

[0003] In practical applications, in order to enable a trolley running mechanism to adapt to tracks of different widths, the existing technology usually designs the wheel track of the trolley running mechanism to be adjustable. However, this requires that the two active rollers be equipped with independent drive units, that is, to use two motors to drive the two active rollers respectively. This dual-motor drive scheme requires two complete drive systems and electrical control systems, which has a high manufacturing cost. Moreover, it is difficult to ensure synchronization between the two motors during operation, which can easily lead to rail wear, accelerate the wear of wheels and tracks, generate noise, and may even cause equipment damage or operational safety hazards. Therefore, there are still shortcomings and deficiencies in the existing technology. Utility Model Content

[0004] This invention provides a planetary running mechanism for a crane to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a planetary running mechanism for a crane, including a trolley frame. Both ends of the trolley frame have strip-shaped through holes along their width direction. Two symmetrically arranged sliders are slidably connected within the through holes. An adjustment mechanism for adjusting the distance between the two sliders is provided between the two sliders located in the same through hole. Inverted U-shaped roller frames are fixedly connected to the bottom surfaces of all four sliders. Driven rollers are rotatably connected to the two roller frames at one end of the trolley frame via axles. Splined sleeves are rotatably connected to the two roller frames at the other end of the trolley frame. A driving roller is coaxially fixed to the splined sleeve. A splined shaft corresponding to the splined sleeve is rotatably connected to the bottom surface of the trolley frame. The splined sleeve and the corresponding splined shaft are splinedly connected. A motor is installed at the end of the trolley frame near the driving roller. The output shaft of the motor is driven by a rotary planetary reducer. The output shaft of the rotary planetary reducer is driven by a T-shaped steering gear located between two splined shafts. The two output shafts of the T-shaped steering gear are driven by the two splined shafts.

[0006] Preferably, the adjusting mechanism includes a lead screw rotatably connected in the through hole, one end of the lead screw extending outside the trolley moving frame and coaxially fixed with a handwheel, the two ends of the lead screw having opposite threads, the lead screw being threadedly connected to the slider, a guide rod fixedly connected in the through hole above the lead screw, the slider being sleeved on the guide rod and slidably connected to the guide rod, and a locking bolt threadedly connected to the top surface of the slider.

[0007] Preferably, a scale for indicating the wheel track adjustment amount is engraved on one side of the top surface of the trolley moving frame corresponding to the through hole.

[0008] Preferably, a brake is installed between the output shaft of the motor and the planetary reducer.

[0009] Preferably, the bottom surface of the trolley moving frame is fixedly connected to mounting plates located at both ends of the spline shaft, and the spline shaft is rotatably connected to the mounting plates.

[0010] The beneficial effects of this utility model are as follows: (1) This utility model uses a single motor to drive two splined shafts to rotate synchronously through a planetary reducer and a T-type steering gear. The two splined shafts drive two active rollers to rotate through a spline sleeve, so that the two active rollers can slide along the axial direction of the splined shaft to adapt to the change in wheel gauge and obtain synchronous power. This reduces the occurrence of track wear caused by asynchronous driving from the power source, thereby reducing the wear of wheels and tracks, extending the life of the trolley running mechanism, and reducing maintenance costs; (2) Compared with dual motor drive, single motor drive can save the cost of a whole set of drive units and complex synchronous control systems, thereby reducing the overall manufacturing cost and later maintenance cost; (3) By rotating the handwheel to drive the screw to rotate, the sliders of the two sections of the screw move synchronously in opposite directions to achieve stepless continuous adjustment of wheel gauge. The setting of the scale makes the adjustment more intuitive, thereby adapting to tracks of different widths and improving the versatility and utilization of the trolley running mechanism. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the structure of this utility model; Figure 3 for Figure 2 A schematic diagram of the cross-section at point aa.

[0012] Reference numerals: 1. Cart moving frame; 2. Through hole; 3. Slider; 4. Adjustment mechanism; 41. Lead screw; 42. Handwheel; 43. Guide rod; 44. Locking bolt; 5. Roller frame; 6. Driven roller; 7. Spline sleeve; 8. Driven roller; 9. Spline shaft; 10. Mounting plate; 11. Motor; 12. Angle planetary reducer; 13. T-type steering gear; 14. Scale; 15. Brake. Detailed Implementation

[0013] The present invention will now be further described with reference to the accompanying drawings.

[0014] like Figure 1-3 As shown, this utility model provides a planetary running mechanism for a crane, including a trolley frame 1. Both ends of the trolley frame 1 have strip-shaped through holes 2 along their width direction. Two symmetrically arranged sliders 3 are slidably connected within the through holes 2. An adjusting mechanism 4 for adjusting the distance between the two sliders 3 located within the same through hole 2 is provided. Inverted U-shaped roller frames 5 are fixedly connected to the bottom surfaces of all four sliders 3. Driven rollers 6 are rotatably connected to the two roller frames 5 at one end of the trolley frame 1 via axles. Splined sleeves 7 are rotatably connected to the two roller frames 5 at the other end of the trolley frame 1 via bearings. Driving rollers 8 are coaxially fixed to the splined sleeves 7. Rotatably connected to the bottom surface of the trolley frame 1 are… The splined shaft 9 corresponding to the splined sleeve 7 is fixedly connected to the bottom surface of the trolley moving frame 1 with mounting plates 10 located at both ends of the splined shaft 9. The splined shaft 9 is rotatably connected to the mounting plates 10. The splined sleeve 7 is splinedly connected to the corresponding splined shaft 9. A motor 11 is installed on the trolley moving frame 1 near the drive roller 8. The output shaft of the motor 11 is driven by a planetary reducer 12. The output shaft of the planetary reducer 12 is driven by a T-type steering gear 13. The T-type steering gear 13 adopts a high-precision gear transmission structure to ensure that the output speed and torque of its two output shafts are consistent. The T-type steering gear 13 is located between the two splined shafts 9. The two output shafts of the T-type steering gear 13 are driven by the two splined shafts 9.

[0015] Specifically, two splined shafts 9 drive two driving rollers 8 to rotate via splined sleeves 7, allowing the two driving rollers 8 to slide along the axial direction of the splined shafts 9 to adapt to changes in wheel track, while also achieving synchronized speed and torque. In use, the motor 11 is started, and the motor 11 drives the T-shaped steering gear 13 to rotate via the planetary reducer 12. The output shafts at both ends of the T-shaped steering gear 13 drive the splined shafts 9 at both ends to rotate. The two splined shafts 9 drive the two driving rollers 8 to rotate synchronously via the two splined sleeves 7. Due to the mechanical synchronization characteristics of the T-shaped steering gear 13, the two driving rollers 8 obtain synchronized power, which can reduce the occurrence of rail wear problems caused by asynchronous driving from the power source, thereby reducing the wear of wheels and rails. The synchronously rotating driving rollers 8 push the trolley moving frame 1 and all its components to run smoothly and synchronously along the track. The driven rollers 6 rotate freely accordingly, playing an auxiliary support and guiding role.

[0016] In some embodiments, the adjustment mechanism 4 includes a lead screw 41 rotatably connected in the through hole 2. One end of the lead screw 41 extends to the outside of the trolley moving frame 1 and is coaxially fixed with a handwheel 42. The two ends of the lead screw 41 have opposite threads. The lead screw 41 is threadedly connected to the slider 3. A guide rod 43 located above the lead screw 41 is fixedly connected in the through hole 2. The slider 3 is sleeved on the guide rod 43 and slidably connected to the guide rod 43. A locking bolt 44 is threadedly connected to the top surface of the slider 3. Specifically, when the trolley running mechanism needs to adapt to tracks of different widths, firstly, loosen the four locking bolts 44 and turn the handwheel 42. The handwheel 42 drives the lead screw 41 to rotate. Since the threads at both ends of the lead screw 41 rotate in opposite directions, the rotation will cause the two sliders 3 to move synchronously towards or away from each other along the guide rod 43. The sliders 3 drive the roller frame 5 below them to move, and the roller frame 5 drives the driven roller 6 to move together. Alternatively, the roller frame 5 drives the spline sleeve 7 and the driving roller 8 to slide axially along the spline shaft 9, thereby adjusting the wheel gauge to adapt to tracks of different widths and improving the versatility and utilization of the trolley running mechanism. Then, retighten all the locking bolts 44. The bottom end of the locking bolts 44 presses against the guide rod 43 to fix the sliders 3 and prevent them from shifting due to vibration during operation.

[0017] In some embodiments, a scale 14 for indicating the wheel track adjustment is engraved on one side of the top surface of the trolley frame 1 corresponding to the through hole 2. The actual distance between the two rollers can be read intuitively through the scale 14.

[0018] In some embodiments, a brake 15 is installed between the output shaft of the motor 11 and the planetary reducer 12. Specifically, when it is necessary to stop, the power supply to the motor 11 is cut off, the brake 15 actuates to lock the transmission system, and the trolley running mechanism can be brought to a smooth stop.

[0019] In some embodiments, the trolley frame 1 is provided with a safety cover (not shown in the figure) that covers all transmission components. The safety cover provides dustproof and collision-proof safety protection and makes the overall appearance neat and beautiful.

[0020] The above embodiments can be combined with each other.

[0021] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A planetary travel mechanism for a crane, comprising a trolley moving frame, characterized in that: The trolley moving frame has strip-shaped through holes at both ends along the width direction. Two symmetrically arranged sliders are slidably connected in the through holes. An adjustment mechanism for adjusting the distance between the two sliders is provided between the two sliders located in the same through hole. An inverted U-shaped roller frame is fixedly connected to the bottom surface of each of the four sliders. A driven roller is rotatably connected to the two roller frames at one end of the trolley moving frame through a wheel axle. A spline sleeve is rotatably connected to the two roller frames at the other end of the trolley moving frame. A driving roller is coaxially fixed on the spline sleeve. On the bottom surface of the trolley moving frame, there is a splined shaft corresponding to the splined sleeve. The splined sleeve is splinedly connected to the corresponding splined shaft. A motor is installed on the end of the trolley moving frame near the drive roller. The output shaft of the motor is driven by a planetary reducer. The output shaft of the planetary reducer is driven by a T-type steering gear. The T-type steering gear is located between two splined shafts. The two output shafts of the T-type steering gear are driven by the two splined shafts.

2. The planetary travel mechanism of a crane according to claim 1, characterized in that: The adjustment mechanism includes a lead screw rotatably connected in a through hole. One end of the lead screw extends to the outside of the trolley moving frame and is coaxially fixed with a handwheel. The two ends of the lead screw have opposite threads. The lead screw is threadedly connected to the slider. A guide rod located above the lead screw is fixedly connected in the through hole. The slider is sleeved on the guide rod and slidably connected to the guide rod. A locking bolt is threadedly connected to the top surface of the slider.

3. The planetary travel mechanism of a crane according to claim 1, characterized in that: The top surface of the trolley frame has a scale engraved on one side corresponding to the through hole for indicating the wheel track adjustment.

4. The planetary travel mechanism of a crane according to claim 1, characterized in that: A brake is installed between the output shaft of the motor and the planetary reducer.

5. The planetary travel mechanism of a crane according to claim 1, characterized in that: The bottom surface of the trolley moving frame is fixedly connected to mounting plates located at both ends of the spline shaft, and the spline shaft is rotatably connected to the mounting plates.

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