CN102927251A - Structure of transmission gear box - Google Patents

Abstract

The invention discloses a structure of a transmission gear box. The structure of the transmission gear box is suitable for various industries, such as metallurgy, petroleum, chemical industry, sugar refining, mines and transportation. The structure of the transmission gear box mainly comprises a gear box body, a box cover, a bevel gear transmission mechanism and a first planetary gear transmission mechanism, wherein a first sun wheel shaft of the first planetary gear transmission mechanism is delicately designed to be in a flexible long shaft structure, a first planet carrier and a hollow gear shaft are movably sleeved outside the first sun wheel shaft, and input power passes through the first planetary gear transmission mechanism and the hollow gear shaft and is transmitted to an output stage gear through the bevel gear transmission mechanism, and then is output through an output shaft from multiple angles. The modified structure of the transmission gear box is more compact, and has the advantages of being small in size, light in weight, large in total speed ratio, strong in output torque, large in bearing capacity, stable in transmission, high in transmission efficiency, and the like, can adjust the structure of the power transmission according to different occasions, meets the requirements for special installation of whole equipment, lowers purchase cost of the equipment, widens industrial application scope, and enhances economic advantages.

Description

Transmission gearbox structure

technical field

The invention relates to a gear box structure of mechanical equipment, in particular to a transmission gear box structure with a new transmission form and structure.

Background technique

The transmission gearbox is an important part of mechanical equipment. It undertakes the power transmission of mechanical equipment, such as the common tension leveler in mechanical equipment. As an important equipment in continuous casting equipment in the iron and steel industry, due to its special structure and limited space On the one hand, the transmission gearbox for the tension leveling machine needs to meet the requirements of low-speed and high-torque output, and on the other hand, it is also greatly limited in terms of external and installation dimensions. The disclosed Chinese patent No. 200920119442.2 of the "vertical roller mill gearbox" and the disclosed Chinese patent No. 201020196411.X of the "mixer power transmission gearbox" all relate to a bevel gear transmission mechanism and a planetary gear The gear box transmission structure of the transmission mechanism. However, the power transmission design between their bevel gear transmission mechanism and planetary gear transmission mechanism is not smart and compact enough to effectively meet the requirements of the gearbox for low-speed, high-torque output, and high-speed ratio transmission, especially the gearbox is large in size and heavy. It is heavy, and its power transmission cannot be adjusted according to actual work needs, which greatly affects the speed ratio and torque output by the gearbox.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a gear box that can not only meet the requirements of the gearbox for low-speed, high-torque output, and high-speed ratio transmission, but also greatly reduce the overall size of the gearbox and the weight of the whole machine. Transmission gearbox structure, the transmission gearbox also has the advantages of compact structure, small size, light weight, large overall speed ratio, strong output torque, large bearing capacity, stable transmission and high transmission efficiency.

Technical problem of the present invention is realized through the following technical solutions:

A transmission gear box structure, mainly including a gear box body, a box cover, and a bevel gear transmission mechanism and a first planetary gear transmission mechanism installed in the gear box body; the bevel gear transmission mechanism mainly includes bevel gear shafts meshing with each other and a bevel gear, the bevel gear shaft is the power input shaft; the first planetary gear transmission mainly includes the first sun gear shaft, the first planetary gear set, the first planetary gear shaft, the first ring gear and the first planet carrier , an output shaft is installed below the first sun gear shaft, and the two ends of the output shaft are respectively rotatably supported on the bearings installed in the gear box and driven to rotate by the first planetary gear transmission mechanism. The bevel gear transmission is connected to On the first sun gear shaft, both ends of the first sun gear shaft are rotatably supported on the bearings installed in the gear box; the first planetary gear set is respectively meshed with the first sun gear shaft and the first ring gear, and the first An inner ring gear is connected to the gear box; the first sun gear shaft is also equipped with a movable sleeve first planet carrier and hollow gear shaft; one end of the first planet carrier is connected to the first planet wheel shaft, The other end is in transmission connection with the hollow gear shaft; the output shaft is provided with a large gear for transmission connection, and the large gear meshes with the hollow gear shaft.

The second planetary gear transmission mechanism for power input is provided on the bevel gear shaft, and the second planetary gear transmission mechanism mainly includes a mounting bracket, an inner gear sleeve, a second sun gear shaft, a second planetary gear set, and a second planetary gear shaft , the second ring gear and the second planet carrier; the mounting bracket is connected to the second ring gear, and the second ring gear is connected to the gear box; the inner gear sleeve is rotatably supported on the mounting bracket On the inner bearing, the inner gear sleeve is in transmission connection with the second sun gear shaft; the second planetary gear set meshes with the second sun gear shaft and the second ring gear respectively; one end of the second planet carrier is connected with the The second planetary gear shaft is connected, and the other end is in transmission connection with the bevel gear shaft.

The first sun gear shaft is a flexible long shaft.

The hollow gear shaft is a hollow cylindrical gear shaft, and the corresponding large gear is a cylindrical gear meshed with the hollow cylindrical gear shaft.

The hollow gear shaft is a hollow worm, and the corresponding large gear is a worm gear meshed with the hollow worm.

The output shaft is a solid shaft or a splined hollow shaft or a flange shaft.

The first planetary gear transmission mechanism is a planetary gear transmission mechanism with more than one stage.

The second planetary gear transmission mechanism is a planetary gear transmission mechanism with more than one stage.

A lubricating oil replenishment tank is installed on the top of the gear box, and a water-cooled coil is arranged in the gear box.

Compared with the prior art, the present invention mainly adopts the bevel gear transmission mechanism and the first planetary gear transmission mechanism as the power transmission structure in the transmission gearbox, and ingeniously designs the first sun gear shaft of the first planetary gear transmission mechanism as Flexible long shaft structure, the first planetary carrier and the hollow gear shaft are movably mounted on the first sun gear shaft, and the input power is sequentially passed through the first sun gear shaft, the first planetary gear set, and the first planetary shaft through the bevel gear transmission mechanism during operation. The wheel shaft and the first planet carrier are transmitted to the hollow gear shaft, and then the hollow gear shaft drives the output shaft to rotate and output. The improved transmission gearbox has the characteristics of compact structure, small size, light weight, large overall speed ratio, strong output torque, and load bearing It has the advantages of large capacity, stable transmission, and high transmission efficiency. In particular, it can adjust the input and output ends of the gearbox according to different usage occasions. This not only meets the requirements for special installation of the overall equipment, but also reduces equipment procurement costs. Both industrial applications and economics have great advantages.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of the present invention.

Detailed ways

The embodiments of the present invention will be described in detail below according to the above-mentioned drawings.

As shown in Figure 1, 1. large gear, 2. output shaft, 3. first planetary gear transmission mechanism, 31. first ring gear, 32. first planetary gear shaft, 33. first planetary gear set, 34. The first planet carrier, 35. the first sun gear shaft, 4. the second planetary gear transmission mechanism, 41. the mounting frame, 42. the inner gear sleeve, 43. the second sun gear shaft, 44. the second planetary gear set, 45. the first Two planetary gear shafts, 46. The second planet carrier, 47. The second inner ring gear, 5. Lubricating oil replenishment tank, 6. Bevel gear transmission mechanism, 61. Bevel gear shaft, 62. Bevel gear, 7. Bearing seat, 8 .Gear case body, 9. Case cover, 10. Hollow gear shaft.

Transmission gear box structure, as shown in Figure 1, it relates to the power transmission structure of the gear box in a kind of mechanical equipment, present embodiment is mainly described in detail with the gear box of tension straightening machine as example, it is made up of gear box body 8, box The cover 9, the bevel gear transmission mechanism 6 and the first planetary gear transmission mechanism 3 etc. are formed, and the bevel gear transmission mechanism 6 and the first planetary gear transmission mechanism 3 are sealed and arranged in the gear box body 8 through the case cover 9 .

The gear box 8 is made of cast steel, which can ensure the rigidity of the whole machine to meet the needs of special occasions such as large force. The gear box 8 is mainly installed vertically, and it can be equipped with A lubricating oil replenishment tank 5 is installed to meet the lubrication needs of various parts inside the gear box body, and a water-cooled coil can be arranged inside the gear box body 8 to ensure thermal power requirements.

The bevel gear transmission mechanism 6 is installed on the top of the gear case 8, and is mainly composed of a bevel gear shaft 61 and a bevel gear 62. The bevel gear shaft 61 is installed vertically in the gear case 8, and is formed by a bearing seat 7 The double bearings set inside are used to support and rotate, and the bearing seat is mainly connected in the gear box body 8 by screws; the bevel gear shaft 61 is also a power input shaft, and its upper end extends out of the gear box body 8 to connect the power device for power input. The structure is flexible and changeable, it can design different input structures according to different usage occasions, meet the requirements of different speed ratios, different torques, and different installation spaces, and has great promotion value and economic benefits, such as motors and other power sources It can be installed on the top of the gear box 8, and directly drives the bevel gear shaft 61 to rotate. At this time, the installation space can be effectively shortened and the weight of the whole machine can be reduced; the second planetary gear transmission mechanism 4 and the motor can also be installed on the top of the gear box 8 first. The power source drives the bevel gear shaft 61 to rotate through the second planetary gear transmission mechanism to output a larger speed ratio and torque; the lower end of the bevel gear shaft 61 meshes with the bevel gear 62 for power transmission. The ball bearing installed in the gear box body 8 is used as a rotational support.

The second planetary gear transmission mechanism 4 mainly includes a mounting frame 41, an inner gear sleeve 42, a second sun gear shaft 43, a second planetary gear set 44, a second planetary gear shaft 45, a second ring gear 47 and a second planetary gear Frame 46; said mounting frame 41 is used to install power sources such as motors, and the mounting frame is connected to the second ring gear 47 by screws, and the second ring gear is connected to the gear case 8 by screws; The inner gear sleeve 42 is rotatably supported on the bearing in the mounting frame 41, and the inner gear sleeve is connected with the second sun gear shaft 43 via a spline; the second planetary gear set 44 is respectively connected to the second sun gear shaft 43. The second ring gear 47 is meshed; one end of the second planetary carrier 46 is connected to the second planetary shaft 45 via a screw, and the other end is connected to the upper end of the bevel gear shaft 61 via a spline.

The first planetary gear transmission mechanism 3 is installed in the lower part of the gear box body 8, which mainly includes the first sun gear shaft 35, the first planetary gear set 33, the first planetary gear shaft 32, the first ring gear 31 and the first A planet carrier 34; the first sun gear shaft 35 is horizontally installed in the gear box 8, and it adopts a flexible long axis structure to meet the installation requirements of the internal space, and both ends are designed as optical axis structures; The right end of the first sun gear shaft 35 penetrates into the bevel gear 62, and is provided with a spline for transmission connection with the bevel gear. The use performance is improved, and the load equalizing effect is also improved; the left end of the first sun gear shaft 35 is also supported and rotated by the bearing.

The first planetary gear set 33 meshes with the first sun gear shaft 35 and the first ring gear 31 respectively, and the first ring gear is connected to the gear case 8 via screws; the first planet gear shaft 32 It is connected and fixed with the first planetary carrier 34 by screws. The first planetary carrier is movably fitted on the first sun gear shaft 35. At the same time, a hollow gear shaft 10 is provided adjacent to the first planetary carrier. The two ends of the hollow gear shaft Supported on the bearings provided in the gear case 8 respectively, the hollow gear shaft 10 is also movably fitted on the first sun gear shaft 35 , and the first planet carrier 34 and the hollow gear shaft 10 are connected by splines for transmission.

The above-mentioned structure can ingeniously transmit the power of the bevel gear 62 to the first planetary gear transmission mechanism 3 only through the structure of the flexible long axis of the first sun gear shaft 35 in a limited installation space, and reasonably solve the problem of the hollow gear shaft. The bearing support problem of 10 has utilized the limited internal space in the gear box body 8 to the greatest extent.

The output shaft 2 is installed below the first sun gear shaft 35, and the two ends of the output shaft are respectively supported on the bearings provided in the gear box body 8, and the output shaft is provided with a large gear 1 connected by a key. Mesh with the hollow gear shaft 10; the hollow gear shaft can be designed as a hollow cylindrical gear shaft, and the corresponding large gear is a cylindrical gear meshed with the hollow cylindrical gear shaft. At this time, the power of the output shaft 2 is shown in Figure 1 The horizontal output is shown; the hollow gear shaft 10 can also be designed as a hollow worm, and the corresponding large gear 1 is a worm gear meshed with the hollow worm. At this time, the power output direction of the output shaft is rotated by 90°; if the hollow gear shaft 10 It becomes a cross-axis helical gear transmission, and the direction of the output shaft can be rotated arbitrarily at 360 degrees. Simultaneously, the bevel gear transmission mechanism 6 can mesh and perform power output within the angle range of 90° or non-90°. For example, the intersection angle of the flange (not shown) and the bevel gear 62 can be used to change the angle of the hollow gear shaft 10. output direction. Therefore, the above-mentioned structure can be installed at multiple angles, and can be rotated arbitrarily at 360°; the structure of the output shaft 2 can also be flexible and changeable, such as a solid shaft, a splined hollow shaft, a flange shaft, and the like.

The first planetary gear transmission mechanism 3 and the second planetary gear transmission mechanism 4 are planetary gear transmission mechanisms with more than one level. If it is designed as a one-level planetary gear transmission mechanism, the volume of the installation space can be reduced. If it is designed as multiple The multi-stage planetary gear transmission mechanism can output larger speed ratio and torque. At the same time, both the first planetary carrier 34 and the second planetary carrier 46 adopt a single-arm structure, which effectively saves internal space and weight, and the bearing between the planetary gear set and the planetary wheel shaft is also selected to reduce the number of planetary gears at the same level. The relative error of the radial clearance of the gear bearings is used to improve the load equalization effect.

The input power process of the transmission gearbox is shown in Figure 1, mainly the motor and other power sources are transmitted to the output through the second planetary gear transmission mechanism 4, the bevel gear transmission mechanism 6, the first planetary gear transmission mechanism 3 and the large gear 1 in sequence. On the shaft 2, it is connected with the equipment shaft through the output shaft, so as to realize low-speed high-torque output.

Compared with the traditional parallel shaft transmission gearbox, the present invention has reduced weight and shape under the same bearing capacity, and has the advantages of compact structure, large overall speed ratio, light weight, large bearing capacity, stable transmission, high transmission efficiency, etc. Advantages, the output torque can reach 80KN.m/t, and it is a good choice for this type of reducer that has high requirements for installation space. Sugar, mining, transportation and other industries.

Claims (9)

1. a driving gear box structure mainly comprises gear housing (8), case lid (9) and is installed in gear housing interior bevel gear transmission mechanism (6) and the first planetary gear mechanism (3); Described bevel gear transmission mechanism (6) mainly comprises intermeshing angular wheel shaft (61) and umbrella gear (62), and this angular wheel shaft (61) is power input shaft; Described the first planetary gear mechanism (3) mainly comprises the first sun wheel shaft (35), the first planetary gear set (33), the first row spider gear shaft (32), the first ring gear (31) and the first planet carrier (34), described the first sun wheel shaft (35) below is equipped with output shaft (2), on the bearing that rotating support is installed in gear housing (8) respectively of these output shaft two ends, and be subjected to the first planetary gear mechanism (3) to drive rotation, it is characterized in that described umbrella gear (62) is in transmission connection on the first sun wheel shaft (35), on the bearing that rotating support is installed respectively of these the first sun wheel shaft two ends in gear housing (8); Described the first planetary gear set (33) is meshed with the first sun wheel shaft (35), the first ring gear (31) respectively, and this first ring gear is connected on the gear housing (8); Outer the first planet carrier (34) and the hollow pinion (10) that also is provided with movable set of described the first sun wheel shaft (35); Described the first planet carrier (34) one ends are connected with the first row spider gear shaft (32), and the other end and hollow pinion (10) are in transmission connection; Described output shaft (2) is provided with the gearwheel (1) that is in transmission connection, and this gearwheel is meshed with described hollow pinion (10).

2. driving gear box structure according to claim 1, it is characterized in that described angular wheel shaft (61) is provided with second planetary gear mechanism (4) of power input, this second planetary gear mechanism mainly comprises scaffold (41), internal tooth casing (42), the second sun wheel shaft (43), the second planetary gear set (44), the second planet wheel shaft (45), the second ring gear (47) and the second planet carrier (46); Described scaffold (41) is connected on the second ring gear (47), and this second ring gear is connected on the gear housing (8); On the bearing of described internal tooth casing (42) rotating support in scaffold (41), this internal tooth casing and the second sun wheel shaft (43) are in transmission connection; Described the second planetary gear set (44) is meshed with the second sun wheel shaft (43), the second ring gear (47) respectively; Described the second planet carrier (46) one ends are connected with the second planet wheel shaft (45), and the other end and angular wheel shaft (61) are in transmission connection.

3. driving gear box structure according to claim 1 is characterized in that described the first sun wheel shaft (35) is flexible long shaft.

4. driving gear box structure according to claim 1 is characterized in that described hollow pinion (10) is hollow cylinder tooth axle, and corresponding gearwheel (1) is the cylindrical gears for being meshed with hollow cylinder tooth axle then.

5. driving gear box structure according to claim 1 is characterized in that described hollow pinion (10) is hollow worm screw, and corresponding gearwheel (1) is the worm gear for being meshed with hollow worm screw then.

6. driving gear box structure according to claim 1 is characterized in that described output shaft (2) is solid shaft or spline hollow shaft or flange shaft.

7. driving gear box structure according to claim 1 is characterized in that described the first planetary gear mechanism (3) is the above planetary gear mechanism of one-level.

8. driving gear box structure according to claim 2 is characterized in that described the second planetary gear mechanism (4) is the above planetary gear mechanism of one-level.

9. driving gear box structure according to claim 1 is characterized in that described gear housing (8) top is equipped with lubricant oil oil feeding reservoir (5), and gear housing is provided with the water-cooled coil pipe in (8).