Cable drum single-stage bevel gear speed reducer with low failure rate

Abstract

The utility model discloses a low-failure-rate cable drum single-stage bevel gear speed reducer, belongs to the technical field of speed reducer equipment, and is used for reducing the failure rate of the cable drum single-stage bevel gear speed reducer. According to the technical scheme, a flange is connected to the upper end of a shaft sleeve, a gear shaft is installed in a shaft hole of the shaft sleeve, a bevel gear is connected to the lower end of the gear shaft, two conical roller bearings are placed in the shaft hole of the shaft sleeve and are arranged on the gear shaft in a back-to-back sleeving mode, and a positioning sleeve is arranged between the two conical roller bearings and arranged on the gear shaft in a sleeving mode. And the upper part of the upper tapered roller bearing is sleeved at the upper end of the gear shaft through a lock nut. The single-stage bevel gear speed reducer is simple in structure and convenient to use, the operation reliability of the single-stage bevel gear speed reducer can be effectively improved, and therefore the fault occurrence rate of the scraper cable drum speed reducer is reduced, and stable operation of equipment is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cable drum single-stage bevel gear speed reducer belongs to speed reducer equipment technical field. BACKGROUND

[0002] The cable drum is one of important equipment of the power supply system of the semi-door type scraper reclaimer, and the vertical series connection structure of the driving motor plus double speed reducers needs to be used when the cable drum is running, and the lower speed reducer is a single-stage bevel gear speed reducer.

[0003] The existing single-stage bevel gear speed reducer has the problems that there is only one disc cone roller bearing on the high-speed shaft, the high-speed shaft has no reliable positioning and support, the bearing clearance cannot be adjusted, the side gap and the meshing surface of the bevel gear change during the running process, and the tooth surface is worn, meanwhile, the high-speed shaft and the bevel gear are installed in a split type, the strength of the shaft shoulder is reduced due to stress concentration, and the shaft is broken.

[0004] Therefore, it is necessary to improve the internal transmission structure of the existing single-stage bevel gear speed reducer. INVENTION CONTENTS

[0005] The utility model solves the technical problems that a low-failure-rate cable drum single-stage bevel gear speed reducer is provided, the bearing of the single-stage bevel gear speed reducer can be positioned and the clearance can be adjusted, the positioning and support of the high-speed shaft can be effectively improved, and the tooth surface wear of the bevel gear during the running process is reduced.

[0006] The technical scheme for solving the above technical problems is:

[0007] A low-failure-rate cable drum single-stage bevel gear speed reducer, which comprises a shaft sleeve, a flange flange, a gear shaft and a bevel gear, the flange flange is connected to the upper end of the shaft sleeve, the gear shaft is installed in the shaft hole of the shaft sleeve, and the bevel gear is connected to the lower end of the gear shaft, wherein the improvement is that two disc cone roller bearings are placed in the shaft hole of the shaft sleeve, the two disc cone roller bearings are back-to-back sleeved on the gear shaft, a positioning sleeve is sleeved on the gear shaft between the two disc cone roller bearings, and a lock nut is sleeved on the upper end of the gear shaft on the upper disc cone roller bearing.

[0008] The above-mentioned low-failure-rate cable drum single-stage bevel gear speed reducer is characterized in that the circumference of the flange flange is uniformly provided with a flange screw hole, and a connecting bolt connects the shaft sleeve and the upper part of the speed reducer through the flange screw hole.

[0009] The above-mentioned low-failure-rate cable drum single-stage bevel gear speed reducer is characterized in that the gear shaft and the bevel gear are connected as a whole, the gear shaft has a flat key groove in the hole, the flat key groove is along the length direction of the gear shaft, and the flat key groove is connected with the driving device through a flat key.

[0010] The low failure rate cable drum single-stage bevel gear reducer has a stop washer sleeved on the gear shaft below the lock nut, and the stop washer is tightly connected with the bottom surface of the lock nut and the upper end surface of the upper tapered roller bearing.

[0011] The low failure rate cable drum single-stage bevel gear reducer has a positioning sleeve tightly connected with the two disc tapered roller bearings at both ends, and a sealing ring installed between the outer periphery of the positioning sleeve and the inner hole wall of the shaft sleeve.

[0012] The utility model discloses a beneficial effect is:

[0013] The utility model discloses two disc tapered roller bearings are installed back to back, and the complex effect of bearing radial load and axial load is played, positioning sleeve is between two disc tapered roller bearings, and the lock nut is fixed on the upper end of the bearing, can position and play the adjustment of bearing, solve the problem that disc tapered roller bearing has no reliable positioning and bearing play can not be adjusted, reduce the tooth surface wear in the operation process of bevel gear, gear shaft and bevel gear are processed into integral structure, solve the broken shaft phenomenon of the strength reduction of shaft shoulder because of stress concentration when installing in split mode.

[0014] The utility model discloses simple structure, convenient to use can effectively improve single-stage bevel gear reducer operation reliability, thereby reduce the failure rate of scraper cable drum speed reducer, ensure the stable operation of equipment. ACCURATE DRAWING

[0015] Figure 1 It is the structure schematic diagram of the utility model.

[0016] Marked in the drawing as follows: shaft sleeve 1, flange 2, flange screw hole 3, gear shaft 4, bevel gear 5, tapered roller bearing 6, positioning sleeve 7, gear shaft inner hole 8, flat key groove 9, lock nut 10, stop washer 11, sealing ring 12. CONCRETE IMPLEMENTATION

[0017] The utility model discloses a shaft sleeve 1, flange 2, gear shaft 4, bevel gear 5, tapered roller bearing 6, positioning sleeve 7, lock nut 10, stop washer 11, sealing ring 12 are formed.

[0018] It is shown in the drawing that the flange 2 is connected at the upper end of the shaft sleeve 1, and the circumference of the flange 2 is evenly distributed with the flange screw hole 3, and the connecting bolt connects the shaft sleeve 1 with the upper part of the speed reducer through the flange screw hole 3.

[0019] It is shown in the drawing that the gear shaft 4 is installed in the shaft hole of the shaft sleeve 1, and the bevel gear 5 is connected at the lower end of the gear shaft 4, and the gear shaft 4 and the bevel gear 5 are made as an integrated structure, which can disperse the stress of the shaft shoulder, and solve the broken shaft phenomenon of the strength reduction of the shaft shoulder because of stress concentration when installing in split mode.

[0020] The gear shaft inner hole 8 has a flat key groove 9 along the length direction of the gear shaft 4,

[0021] The assembly of the flat key is used for connecting the external driving device.

[0022] The two disc cone roller bearings 6 are arranged in the shaft hole of the shaft sleeve 1, and the two disc cone roller bearings 6 are arranged on the gear shaft 4 in a back-to-back manner, and can bear radial load and axial load in combination.

[0023] The positioning sleeve 7 is arranged between the two disc cone roller bearings 6 on the gear shaft 4, the two ends of the positioning sleeve 7 are in abutting connection with the two disc cone roller bearings 6 respectively, the positioning sleeve 7 is located in the middle of the two disc cone roller bearings 6, and the positioning sleeve 7 is tightly arranged on the gear shaft 4 and is used for maintaining the distance between the two disc cone roller bearings 6.

[0024] The outer periphery of the positioning sleeve 7 is provided with a sealing ring 12 between the inner hole wall of the shaft sleeve 1.

[0025] The gear shaft 4 is provided with a lock nut 10 arranged on the upper end of the gear shaft 4, and the lock nut 10 is tightly arranged on the upper part of the upper disc cone roller bearing 6.

[0026] The gear shaft 4 is provided with a stop washer 11 arranged below the lock nut 10, and the stop washer 11 is tightly connected with the bottom surface of the lock nut 10 and the upper end surface of the upper disc cone roller bearing 6.

[0027] One embodiment of the utility model is as follows:

[0028] The outer diameter of the shaft sleeve 1 is 250mm, the inner hole diameter is 120mm, and the height is 240.7mm;

[0029] The outer diameter of the flange 2 is 250mm, the inner hole diameter is 180mm, the thickness is 27.5mm, and the diameter of the flange screw hole 3 is 8mm;

[0030] The diameter of the gear shaft 4 is 55mm, the length is 235.7mm, and the diameter of the gear shaft inner hole 8 is 28mm;

[0031] The upper end diameter of the bevel gear 5 is 122mm, the lower end diameter is 82mm, and the height is 80mm;

[0032] The model of the tapered roller bearing 6 is 31311;

[0033] The outer diameter of the positioning sleeve 7 is 65 mm, the inner hole diameter is 55 mm, and the height is 12 mm;

[0034] The length of the flat key groove 9 is 60 mm, the width is 8 mm, and the depth is 3 mm;

[0035] The outer diameter of the lock nut 10 is 85 mm, the inner hole diameter is 55 mm, and the thickness is 6 mm;

[0036] The outer diameter of the stop washer 11 is 82 mm, the inner hole diameter is 56 mm, and the thickness is 1.6 mm;

[0037] The outer diameter of the sealing ring 12 is 85 mm, the inner hole diameter is 65 mm, and the height is 8 mm.

Claims

1. A low-failure-rate single-stage bevel gear reducer for cable reels, comprising a bushing (1), a flange (2), a gear shaft (4), and a bevel gear (5), wherein the flange (2) is connected to the upper end of the bushing (1), the gear shaft (4) is installed in the shaft hole of the bushing (1), and the bevel gear (5) is connected to the lower end of the gear shaft (4), characterized in that: Two tapered roller bearings (6) are placed in the shaft hole of the bushing (1). The two tapered roller bearings (6) are mounted back to back on the gear shaft (4). A positioning sleeve (7) is mounted between the two tapered roller bearings (6) on the gear shaft (4). A lock nut (10) is mounted on the upper part of the upper tapered roller bearing (6) on the upper end of the gear shaft (4).

2. The low-failure-rate single-stage bevel gear reducer for cable reels according to claim 1, characterized in that: The flange (2) is provided with flange bolt holes (3) evenly distributed around its circumference. The connecting bolts connect the bushing (1) to the upper part of the reducer through the flange bolt holes (3).

3. The low-failure-rate single-stage bevel gear reducer for cable reels according to claim 1, characterized in that: The gear shaft (4) is connected to the bevel gear (5) as a whole. There is a flat keyway (9) in the inner hole (8) of the gear shaft. The flat keyway (9) is along the length direction of the gear shaft (4) and is connected to the drive device through a flat key.

4. The low-failure-rate single-stage bevel gear reducer for cable reels according to claim 1, characterized in that: A stop washer (11) is fitted on the gear shaft (4) below the lock nut (10). The stop washer (11) is tightly connected to the bottom surface of the lock nut (10) and the upper end surface of the upper tapered roller bearing (6).

5. The low-failure-rate single-stage bevel gear reducer for cable reels according to claim 1, characterized in that: The two ends of the positioning sleeve (7) are respectively connected to the two tapered roller bearings (6), and a sealing ring (12) is installed between the outer circumference of the positioning sleeve (7) and the inner wall of the bushing (1).

Images