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CN-224214639-U - Differential worm gear speed reducer

CN224214639UCN 224214639 UCN224214639 UCN 224214639UCN-224214639-U

Abstract

The utility model provides a differential worm gear speed reducer, which comprises a casing, wherein a worm is arranged in the casing, two ends of the worm are coaxially provided with transmission shafts, the transmission shafts are rotatably arranged on the casing, two ends of the worm are provided with second spline shafts, one ends of the transmission shafts close to the worm are provided with first spline shafts, spline sleeves are sleeved on the first spline shafts, the spline sleeves are always arranged on the second spline shafts under the pushing of an elastic mechanism, the worm is meshed with a worm wheel, the worm wheel is movably sleeved on an annular seat and connected with the annular seat through a bar key, a differential mechanism is arranged in the annular seat, and two ends of the differential mechanism are respectively connected with an output shaft. When the differential speed worm gear reducer is in use, the worm can be taken down only by opening the end cover and sliding the spline housing onto the first spline shaft, and meanwhile, the mounting disc and the bolts on the annular seat are detached, so that the worm wheel can be taken down from the annular seat, and the worm wheel and the worm are convenient to detach.

Inventors

  • CAO DONGXI

Assignees

  • 天津联星传动有限公司

Dates

Publication Date
20260508
Application Date
20250626

Claims (7)

  1. 1. The differential worm gear reducer comprises a machine shell (1), wherein end covers (2) are respectively detachably arranged on two sides of the machine shell (1), and the differential worm gear reducer is characterized in that a worm (5) is arranged in the machine shell (1), transmission shafts (4) are coaxially arranged at two ends of the worm (5), and the transmission shafts (4) are rotatably arranged on the machine shell (1); Two ends of the worm (5) are provided with second spline shafts (20), one end, close to the worm (5), of the transmission shaft (4) is provided with a first spline shaft (19), a spline sleeve (6) is sleeved on the first spline shaft (19), and the spline sleeve (6) is always arranged on the second spline shaft (20) under the pushing of the elastic mechanism; The worm (5) is meshed with the worm wheel (7), the worm wheel (7) is movably sleeved on the annular seat (17) and connected with the annular seat through the bar key (8), a differential mechanism is arranged in the annular seat (17), two ends of the differential mechanism are respectively connected with the output shaft (3), and the output shaft (3) is rotatably arranged in the end cover (2).
  2. 2. The differential worm gear reducer as claimed in claim 1, wherein the elastic mechanism comprises a pressure spring (15) sleeved on the first spline shaft (19), a first limiting ring (14) is arranged at one end of the first spline shaft (19) close to the transmission shaft (4), a second limiting ring (16) is arranged on the spline housing (6), and two ends of the pressure spring (15) are respectively in elastic contact with the second limiting ring (16) and the first limiting ring (14).
  3. 3. A differential worm gear reducer as claimed in claim 2, characterized in that the first spline shaft (19) has a clearance fit with the second spline shaft (20) at its end.
  4. 4. A differential worm gear reducer as claimed in claim 1, characterized in that the differential mechanism comprises a mounting plate (18), the mounting plate (18) is coaxially connected with one end of the annular seat (17), a plurality of supports (12) are arranged at the other end of the annular seat (17), a supporting shaft (13) radially arranged with the annular seat (17) is rotatably arranged in each support (12), and a second bevel gear (11) is arranged at one end of the supporting shaft (13) far away from the support (12); the output shafts (3) are coaxial with the annular seat (17), first bevel gears (10) are coaxially arranged at one ends, close to the two output shafts (3), of the output shafts, the first bevel gears (10) are distributed on two sides of the second bevel gears (11), and each second bevel gear (11) is meshed with each first bevel gear (10).
  5. 5. A differential worm gear reducer as claimed in claim 4, characterized in that the output shaft (3) adjacent to the mounting disc (18) is rotatably connected to the mounting disc (18).
  6. 6. A differential worm gear reducer according to claim 5, characterized in that the bar-shaped keys (8) are plural and are arranged on the surface of the annular seat (17), the bar-shaped keys (8) being parallel to the axis of the annular seat (17); The inner wall of the worm wheel (7) is provided with a key groove (9) corresponding to the bar key (8), and when the worm wheel (7) is sleeved on the annular seat (17), the bar key (8) is arranged in the key groove (9).
  7. 7. A differential worm gear reducer according to claim 6, characterized in that the mounting plate (18) is connected to the annular seat (17) by means of fasteners.

Description

Differential worm gear speed reducer Technical Field The utility model relates to the technical field of speed reducers, in particular to a differential worm gear speed reducer. Background The worm gear speed reducer is a power transmission mechanism, which utilizes a speed converter of a gear to reduce the revolution number of a motor (a motor) to a required revolution number and obtain a large torque, and has a quite wide application range in the existing mechanism for transmitting power and motion. ‌ The worm gear is mainly driven by friction, so the worm gear needs to be frequently maintained ‌, and maintenance of the worm gear is an important link for ensuring stable operation of mechanical equipment and prolonging service life. Moreover, friction exists between the worm and the worm, and for the worm and gear speed reducer, the worm and the worm are easy to wear compared with other gears, so that the worm and the worm need to be replaced after the worm and the worm are worn to a certain degree. Because the worm gear in the speed reducer is fixed inside the machine body, when the speed reducer needs to be maintained or replaced, the traditional speed reducer is inconvenient when the worm gear is detached, because the two ends of the worm gear are mounted on the machine body through the bearings, the bearings are fixed with the machine body in an interference fit manner, and inconvenience is brought to the detachment of the worm gear. Therefore, we propose a differential worm gear reducer. Disclosure of utility model The utility model provides a differential worm gear reducer which has the advantage of being convenient to disassemble worm gears and worms, and solves the problems in the background art. The technical scheme is that the differential worm gear speed reducer comprises a machine shell, end covers are detachably arranged on two sides of the machine shell respectively, a worm is arranged in the machine shell, transmission shafts are coaxially arranged at two ends of the worm, the transmission shafts are rotatably arranged on the machine shell, second spline shafts are arranged at two ends of the worm, first spline shafts are arranged at one ends of the transmission shafts close to the worm, spline sleeves are sleeved on the first spline shafts, the spline sleeves are always arranged on the second spline shafts under the pushing of an elastic mechanism, the worm is meshed with a worm wheel, the worm wheel is movably sleeved on an annular seat and connected with the annular seat through a bar key, a differential mechanism is arranged in the annular seat, two ends of the differential mechanism are respectively connected with an output shaft, and the output shaft is rotatably arranged in the end covers. Preferably, the elastic mechanism comprises a pressure spring sleeved on the first spline shaft, a first limiting ring is arranged at one end, close to the transmission shaft, of the first spline shaft, a second limiting ring is arranged on the spline sleeve, and two ends of the pressure spring are respectively in elastic contact with the second limiting ring and the first limiting ring. Preferably, the first spline shaft end portion is in clearance fit with the second spline shaft end portion. Preferably, the differential mechanism comprises a mounting plate, the mounting plate is coaxially connected with one end of the annular seat, a plurality of supports are arranged at the other end of the annular seat, a supporting shaft which is radially arranged with the annular seat is arranged in each support in a rotating manner, a second bevel gear is arranged at one end of the supporting shaft far away from the support, the output shaft is coaxial with the annular seat, a first bevel gear is coaxially arranged at one end close to the two output shafts, the first bevel gears are distributed on two sides of the second bevel gears, and each second bevel gear is meshed with the first bevel gear. Preferably, the output shaft adjacent the mounting plate is rotatably coupled to the mounting plate. Preferably, the bar key is a plurality of and sets up on the surface of annular seat, and bar key is parallel with annular seat axis, is equipped with the keyway that corresponds with bar key on the worm wheel inner wall, and when worm wheel cover was at annular seat, bar key was put in the keyway. Preferably, the mounting plate is connected to the annular seat by fasteners. Compared with the prior art, when the differential speed worm gear reducer is in use, the worm can be taken down only by opening the end cover and sliding the spline housing onto the first spline shaft, and meanwhile, the worm wheel can be taken down from the annular seat by disassembling the mounting disc and the bolts on the annular seat, so that the worm gear can be conveniently disassembled. Drawings In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are requ