Tower type hoisting mechanism

Abstract

The utility model provides a tower type hoisting mechanism which belongs to the technical field of hoisting machinery and comprises a support, a motor, a speed reducer and a winding drum, the speed reducer comprises a main shaft, a planet wheel seat and an inner gear shell, the motor comprises a machine shell and a rotating shaft, the support is provided with a first supporting seat and a second supporting seat which are oppositely arranged, and the planet wheel seat and the machine shell are respectively fixed on two sides of the first supporting seat. The planet wheel seat is sleeved with the inner gear shell, a first bearing and a first sealing piece are arranged between the inner gear shell and the planet wheel seat, the inner gear shell is located in the winding drum and fixedly arranged on the right side wall of the winding drum, and a rotating piece is arranged on the second supporting seat and fixedly connected with the left side wall of the winding drum. The planet wheel seat is provided with a first mounting hole and a second mounting hole which are communicated in a stepped mode, the coupler is rotatably arranged in the first mounting hole through a third bearing, the two ends of the coupler are connected with the rotating shaft and the main shaft respectively, and a second bearing and a second sealing piece are arranged between the main shaft and the second mounting hole. Influence of vibration of the motor on the speed reducer is reduced, and sealing performance and stability are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hoisting machinery, and particularly refers to a tower crane hoisting mechanism. Background Technique

[0002] The hoisting mechanism is used to realize the vertical lifting of materials and is an indispensable part of any hoisting machinery.

[0003] The existing hoisting mechanisms generally include a bracket, on which a motor and a drum are fixedly arranged. The electric shaft of the motor is connected to the rotating shaft of the drum to realize the rotation of the drum, thereby realizing the vertical lifting of materials. The electric shaft of the motor will be connected with a coupling, a brake, a speed reducer, etc., which will cause a larger axial dimension and high requirements for the installation space.

[0004] At present, such as a tower crane direct drive hoisting device with the patent number 2020100410800, it discloses a method of directly connecting the main motor and the speed reducer, and arranges the secondary speed reducer inside the drum, which greatly reduces the axial dimension and the installation requirements. However, the main motor is fixedly connected to the support disk, and the support disk and the secondary planetary gear speed reducer are sealed through a floating oil seal. The vibration generated by the operation of the main motor will affect the vibration of the support disk, resulting in poor sealing effect and affecting the service life of the whole machine. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a tower crane hoisting mechanism. The technical problem to be solved by the utility model is: how to make the sealing performance of the speed reduction mechanism built in the drum better and the transmission more stable.

[0006] The purpose of the utility model can be realized by the following technical solutions: a tower crane hoisting mechanism, including a bracket, a motor, a speed reducer and a drum. The speed reducer includes a main shaft, a planetary gear seat and an internal tooth shell. The motor includes a housing and a rotating shaft. The bracket has a support seat one and a support seat two arranged oppositely. The planetary gear seat and the housing are respectively fixed on both sides of the support seat one. The internal tooth shell is sleeved outside the planetary gear seat. A bearing one and a seal one are arranged between the internal tooth shell and the planetary gear seat. The internal tooth shell is located inside the drum and is fixedly arranged on the right side wall of the drum. A rotating part is arranged on the support seat two, and the rotating part is fixedly connected to the left side wall of the drum. The planetary gear seat has a stepped connecting mounting hole one and mounting hole two. The coupling is rotatably arranged in the mounting hole one through a bearing three. The two ends of the coupling are respectively connected to the rotating shaft and the main shaft. A bearing two and a seal two are arranged between the main shaft and the mounting hole two.

[0007] Further, the support seat one includes a first support plate and a second support plate that are parallel to each other and a connecting plate that welds and fixes the first support plate and the second support plate. The first support plate has a circular ring part, and the circular ring part is clamped on the planetary gear seat.

[0008] Further, the internal gear housing includes an internal gear ring and a rear cover for sealing and fixing the internal gear ring. The inner side surface of the rear cover has a recessed mounting groove, and a fourth bearing is arranged in the mounting groove. One end of the main shaft extends into the fourth bearing, and the inner circumference of the internal gear ring has internal teeth.

[0009] Further, one end of the main shaft close to the rear cover has an external tooth portion. The external tooth portion and the internal teeth of the internal gear ring are engaged with a first planetary gear through a gear. The first planetary gear is arranged on the planetary carrier through a first one-way bearing. The planetary carrier is fixedly arranged on the sun gear. The sun gear is rotatably sleeved on the main shaft. The sun gear and the internal teeth of the internal gear ring are engaged with a second planetary gear through a gear. The second planetary gear is arranged on the planetary gear seat through a second one-way bearing.

[0010] Further, the planetary gear seat has an oil passage, and the oil passage communicates with the inside of the internal gear ring.

[0011] Further, the motor includes a stator and a rotor installed in the motor housing. The rotating shaft is fixed to the rotor. The motor housing includes a housing body and a motor cover. The inner circumference of the housing body has a sunken hole, and the motor cover is embedded and fixed in the sunken hole. The rotating shaft passes through the motor cover and is fixedly connected with the coupling by splines. The end of the housing body and the second support plate are nested with each other and then fixed by fixing parts. The installation of the motor cover in the sunken hole can reduce the axial dimension and enable the embedded motor cover to better align the axes of the rotating shaft and the coupling.

[0012] Compared with the prior art, the technical effects of the present utility model are as follows: 1. The planetary gear seat and the motor housing are respectively fixed on both sides of the first support seat by the first support seat to respectively stabilize the motor and the reducer, so that both have a relatively stable working environment, and reduce the influence of the vibration of the motor on the reducer; a second seal is arranged between the main shaft and the second mounting hole on the housing body to improve the sealing performance.

[0013] 2. The mutually parallel first support plate and second support plate and the connecting plate for welding and fixing the first support plate and the second support plate form an installation space. The reducer is fixed on the first support plate through the planetary gear seat, and the motor is fixed on the second support plate, forming relatively independent fixed positions and both being fixed on the bracket, ensuring the coaxiality of the motor and the reducer and reducing the influence of the vibration of the motor on the reducer. Description of the Drawings

[0014] Figure 1 is a sectional view of the present utility model.

[0015] Figure 2 is an enlarged view taken along line A-A of the present utility model.

[0016] Drawing number markings: 1. Bracket; 11. First support seat; 111. First support plate; 111a. Ring part; 112. Second support plate; 113. Connecting plate; 12. Second support seat; 2. Motor; 21. Motor housing; 211. Housing; 211a. Sinking hole; 212. Machine cover; 22. Rotating shaft; 23. Stator; 24. Rotor; 3. Reducer; 31. Main shaft; 311. External tooth part; 2. Planet gear seat; 321. First mounting hole; 322. Second mounting hole; 323. Oil passage; 33. Internal tooth housing; 331. Internal gear ring; 332. Rear cover; 332a. Mounting groove; 34. First planet gear; 35. Planet carrier; 36. Sun gear; 37. Second planet gear; 38. First one-way bearing; 39. Second one-way bearing; 4. Drum; 5. First bearing; 6. First seal; 7. Rotating part; 8. Coupling; 9. Third bearing; 10. Second bearing; 101. Second seal; 102. Fourth bearing; Detailed implementation manners

[0017] The following are specific embodiments of the present invention and in combination with the attached drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0018] It should be noted that the descriptions of the present invention in terms of directions such as "up", "down", "left", "right", "top", "bottom", etc. are all defined based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device must be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present invention.

[0019] According to Figure 1 and Figure 2 As shown, a tower hoisting mechanism includes a bracket 1, a motor 2, a reducer 3 and a drum 4. The motor 2 includes a motor housing 21 and a stator 23 and a rotor 24 installed in the motor housing 21. The rotor 24 is fixed to the rotor 24, and the rotating shaft 22 extends out of the motor housing 21 and is connected to the reducer 3.

[0020] The speed reducer 3 includes an internal tooth housing 33. The internal tooth housing 33 includes an internal gear ring 331 and a rear cover 332 that seals and fixes the internal gear ring 331. There is a recessed mounting groove 332a on the inner side surface of the rear cover 332. A fourth bearing 102 is arranged in the mounting groove 332a. One end of the main shaft 31 extends into the fourth bearing 102. The inner circumference of the internal gear ring 331 has internal teeth. An internal gear carrier 2 is also installed inside the internal tooth housing 33. The internal tooth housing 33 is sleeved outside the internal gear carrier 2. A first bearing 5 and a first seal 6 are arranged between the internal tooth housing 33 and the internal gear carrier 2. The internal gear carrier 2 has a first mounting hole 321 and a second mounting hole 322 that communicate in a stepped manner. A second bearing 10 and a second seal 101 are arranged between the main shaft 31 and the second mounting hole 322. One end of the main shaft 31 close to the rear cover 332 has an external tooth portion 311. The external tooth portion 311 and the internal teeth of the internal gear ring 331 are engaged with a first planet gear 34 through gears. The first planet gear 34 is arranged on a planet carrier 35 through a first one-way bearing 38. The planet carrier 35 is fixedly arranged on a sun gear 36. The sun gear 36 is rotatably sleeved on the main shaft 31. A second planet gear 37 is engaged between the sun gear 36 and the internal teeth of the internal gear ring 331 through gears. The second planet gear 37 is arranged on the internal gear carrier 2 through a second one-way bearing 39. The coupling 8 is rotatably arranged in the first mounting hole 321 through a third bearing 9. The two ends of the coupling 8 are respectively connected to the rotating shaft 22 and the main shaft 31. When the rotor 24 of the motor 2 rotates to drive the rotating shaft 22 and the main shaft 31 to rotate, then the external tooth portion 311 of the main shaft 31 drives the first planet gear 34 to rotate. The first planet gear 34 drives the internal tooth housing 33 to rotate. The internal tooth housing 33 drives the second planet gear 37 to rotate. Since the second planet gear 37 is arranged on the internal gear carrier 2 through the second one-way bearing 39 and the internal gear carrier 2 is fixed on the bracket 1, the second planet gear 37 can only rotate self. The second planet gear 37 drives the sun gear 36 to rotate. The sun gear 36 drives the planet carrier 35 to rotate. The first planet gear 34 is arranged on the planet carrier 35 through the first one-way bearing 38 and will have self-rotation and revolution. The entire series of gear meshing transmissions complete a two-stage speed reduction.

[0021] The support 1 has a support base one 11 and a support base two 12 which are oppositely arranged. The planetary gear seat 2 and the housing 21 are respectively fixed on both sides of the support base one 11. The internal gear housing 33 is fixedly arranged on the right side wall of the drum 4. A rotating member 7 is arranged on the support base two 12, and the rotating member 7 is fixedly connected to the left side wall of the drum 4. The rotation of the internal gear housing 33 of the speed reducer drives the drum 4 to rotate. The support base one 11 includes a first support plate 111 and a second support plate 112 which are parallel to each other and a connecting plate 113 that welds and fixes the first support plate 111 and the second support plate 112. The first support plate 111 has an annular part 111a, and the annular part 111a is engaged with the planetary gear seat 2. The mutually parallel first support plate 111 and second support plate 112 and the connecting plate 113 that welds and fixes the first support plate 111 and the second support plate 112 form an installation space. The speed reducer 3 is fixed on the first support plate 111 through the planetary gear seat 2, and the motor 2 is fixed on the second support plate 112, forming relatively independent fixed positions and both being fixed on the support 1, ensuring the coaxiality of the motor 2 and the speed reducer 3 and reducing the influence of the vibration of the motor 2 on the speed reducer 3.

[0022] The housing 21 includes a housing body 211 and a housing cover 212. The inner circumference of the housing body 211 has a sunken hole 211a, and the housing cover 212 is embedded and fixed in the sunken hole 211a. The rotating shaft 22 passes through the housing cover 212 and is spline-fixed to the coupling 8. The end of the housing body 211 and the second support plate 112 are nested with each other and then fixed by fixing parts. Installing the housing cover 212 in the form of the sunken hole 211a can reduce the axial dimension and enable the embedded housing cover 212 to better keep the axes of the rotating shaft 22 and the coupling 8 consistent.

[0023] The planetary gear seat 2 has an oil passage 323, and the oil passage 323 communicates with the inside of the internal gear ring 331.

[0024] The above embodiments are only the preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope defined by the claims of the present invention.

Claims

1. A tower lifting mechanism, comprising a support (1), a motor (2), a reducer (3) and a drum (4), wherein the reducer (3) comprises a main shaft (31), a planetary wheel seat (32) and an inner gear housing (33), and the motor (2) comprises a housing (21) and a rotating shaft (22), characterized in that: The bracket (1) comprises a supporting seat 1 (11) and a supporting seat 2 (12) which are arranged opposite to each other, a planetary wheel seat (32) and a housing (21) are respectively fixed on two sides of the supporting seat 1 (11), an inner gear housing (33) is sleeved outside the planetary wheel seat (32), a bearing 1 (5) and a sealing member 1 (6) are arranged between the inner gear housing (33) and the planetary wheel seat (32), the inner gear housing (33) is located in the reel (4) and is fixedly arranged on the right side wall of the reel (4), and a gear housing (33) is arranged on the supporting seat 2 (12). The rotating member (7) is fixedly connected to the left side wall of the winding drum (4); the planetary wheel seat (32) has a first mounting hole (321) and a second mounting hole (322) connected in a step-like manner; the coupling (8) is rotatably arranged in the first mounting hole (321) through a third bearing (9); the two ends of the coupling (8) are respectively connected to the rotating shaft (22) and the main shaft (31); and a second bearing (10) and a second sealing member (101) are arranged between the main shaft (31) and the second mounting hole (322).

2. A tower lifting mechanism according to claim 1, characterized in that: The support seat (11) comprises a first support plate (111) and a second support plate (112) which are parallel to each other, and a connecting plate (113) for welding and fixing the first support plate (111) and the second support plate (112), wherein the first support plate (111) has an annular portion (111a), and the annular portion (111a) is engaged with the planetary wheel seat (32).

3. A tower lifting mechanism according to claim 2, characterized in that: The inner gear housing (33) comprises an inner gear ring (331) and a rear cover (332) for sealing and fixing the inner gear ring (331); the inner side surface of the rear cover (332) is provided with a recessed mounting groove (332a); a bearing four (102) is arranged in the mounting groove (332a); one end of the main shaft (31) extends into the bearing four (102); and the inner circumference of the inner gear ring (331) is provided with internal teeth.

4. A tower lifting mechanism according to claim 3, characterized in that: The main shaft (31) has an outer tooth portion (311) at one end close to the rear cover (332). The outer tooth portion (311) and the inner teeth of the inner gear ring (331) are meshed with a planetary gear 1 (34) through gears. The planetary gear 1 (34) is arranged on a planetary carrier (35) through a one-way bearing 1 (38). The planetary carrier (35) is fixedly arranged on a sun gear (36). The sun gear (36) is rotatably sleeved on the main shaft (31). A planetary gear 2 (37) is meshed between the sun gear (36) and the inner teeth of the inner gear ring (331) through gears. The planetary gear 2 (37) is arranged on the planetary gear seat (32) through a one-way bearing 2 (39).

5. A tower lifting mechanism according to claim 4, characterized in that: The planetary wheel seat (32) is provided with an oil passage (323), and the oil passage (323) is connected to the interior of the inner gear ring (331).

6. A tower lifting mechanism according to claim 2, characterized in that: The motor (2) comprises a stator (23) and a rotor (24) installed in a casing (21); the rotating shaft (22) and the rotor (24) are fixed; the casing (21) comprises a shell (211) and a cover (212); the inner periphery of the shell (211) comprises a sink hole (211a); the cover (212) is embedded in the sink hole (211a) and fixed; the rotating shaft (22) passes through the cover (212) and is spline-connected to a coupling (8); and the end of the shell (211) and the second support plate (112) are mutually nested and fixed via a fixing member.

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