CN102832741B - Motor and play detection device of output shaft thereof - Google Patents

Abstract

The invention discloses a motor and an output shaft movement detection device thereof, comprising a casing and a reducer, a rotor is arranged inside the casing, the output shaft of the rotor protrudes from the casing, and the reducer includes Worm wheel, casing and worm, the worm is arranged at the end of the output shaft, the worm wheel is rotatably connected in the casing, the casing is fixed on the casing, and the output shaft extends into the casing In the body, the worm is matched with the worm wheel, a sleeve with a spherical outer surface is provided at the end of the output shaft, a positioning member is provided in the housing, and a hole is provided on the positioning member. The sleeve is rotatably connected in the hole, the positioning member is provided with slots communicating with the inner wall of the hole, and clamping arms are formed between the slots. When the installation position of the main body deviates, since the outer surface of the sleeve is a spherical surface, even if there is a certain angular deviation between the output shaft and the positioning part, the installation of the main body will not be affected.

Description

A motor and its output shaft movement detection device

technical field

The invention relates to the technical field of motors, in particular to a device for detecting movement of a motor and an output shaft of an automobile window lifter.

Background technique

The automobile is provided with an automobile window regulator for raising and lowering the window glass. The main part of the automobile window regulator is a motor. The motor includes a casing and a reducer. The casing is provided with a rotor. The output shaft protrudes from the casing, and the speed reducer includes a worm gear, a casing and a worm, the worm is arranged at the end of the output shaft, the worm wheel is rotatably connected in the casing, and the casing is fixed on the On the housing, the output shaft extends into the housing, and the worm is matched with the worm wheel.

Generally, the part of the output shaft of the motor that extends into the housing is connected to the housing through ball bearings. In this way, the installation position of the motor body must be kept highly accurate, otherwise, the output shaft cannot be installed in the bearing, so it needs to be changed.

The motor needs to detect the axial runout of the rotor before leaving the factory. If the axial runout of the rotor is large, the noise of the motor will also be large. In the past, the axial runout of the motor was detected by starting the motor and listening to the noise generated by the motor to judge whether the axial runout of the motor rotor was qualified. This method relied on the worker's supervisor's feeling and could not make a reliable judgment. Therefore, there are Changes are necessary.

Contents of the invention

Aiming at the deficiencies in the prior art, the invention provides a motor, which does not require high installation accuracy of the motor body.

Another object of the present invention is to provide an output shaft runout detection device, which can easily detect the axial runout of the output shaft of the motor.

In order to solve the above-mentioned technical problems, the present invention is solved by the following technical solutions: a motor, including a casing and a reducer, a rotor is arranged inside the casing, the output shaft of the rotor protrudes from the casing, and the The reducer includes a worm gear, a housing and a worm, the worm is arranged at the end of the output shaft, the worm gear is rotatably connected in the housing, the casing is fixed on the housing, and the output shaft extends into the housing, the worm is matched with the worm wheel, a sleeve with a spherical outer surface is provided at the end of the output shaft, a locating member is provided in the housing, and a locating member is provided on the locating member The sleeve is rotatably connected in the hole, the positioning member is provided with a groove communicating with the inner wall of the hole, and a clamping arm is formed between the grooves. When the installation position of the body deviates, that is, there will be a certain angular deviation between the output shaft and the positioning part. Since the outer surface of the sleeve is a spherical surface, even if there is a certain angular deviation between the output shaft and the positioning part, it will not It will affect the installation of the main body.

In the above technical solution, preferably, the casing is provided with a flange, and the bolt is connected to the casing after passing through the flange.

In the above technical solution, preferably, a ball is further included, and the ball is in contact with the positioning member and the end surface of the output shaft respectively. The balls press against the positioning member and the end face of the output shaft respectively to prevent movement between the output shaft and the positioning member.

A device for detecting movement of an output shaft, comprising a base, on which a protrusion with a trapezoidal cross-section and an orientation column are arranged, and a dial indicator is arranged at the end of the base, and the protrusion snaps between the two teeth of the worm, the side wall of the housing is in contact with the outer wall of the orientation column, and the measuring head of the dial indicator is in contact with the housing.

In the above technical solution, preferably, the orientation column includes a column body and a sleeve, and the sleeve tube is rotatably connected to the column body.

In the above technical solution, preferably, there are two protrusions and the dial indicator, and the protrusions and the dial indicator are distributed symmetrically with respect to the central plane of the base.

The beneficial effect of the invention is that since the outer surface of the sleeve is a spherical surface, even if there is a certain angle deviation between the output shaft and the positioning member, the installation of the main body will not be affected.

Description of drawings

Figure 1 is a schematic plan view of the motor.

Fig. 2 is a sectional view along A-A of Fig. 1 .

Fig. 3 is a schematic diagram of a positioning sleeve.

Fig. 4 is a schematic structural diagram of the sleeve.

Fig. 5 is a schematic diagram of an output shaft movement detection device.

Fig. 6 is a schematic diagram of a motor detected by the output shaft movement detection device.

Fig. 7 is a schematic diagram of another motor detected by the output shaft movement detection device.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments: Referring to Figures 1 to 4, a motor includes a casing 1, a reducer 2 and a ball 43, and a rotor 3 is arranged in the casing 1, The output shaft 31 of the rotor 3 protrudes from the casing 1, the speed reducer 2 includes a worm wheel 21, a housing 22 and a worm 23, the worm 23 is arranged at the end of the output shaft 31, and the worm wheel 21 rotates Connected in the housing 22, the casing 1 is fixed on the housing 22, the output shaft 31 extends into the housing 22, the worm 23 is matched with the worm wheel 21, the The end of the output shaft 31 is provided with a sleeve 41 whose outer surface is a spherical surface, and the housing 22 is provided with a positioning member 42, and the positioning member 42 is provided with a hole 421, and the sleeve 41 is rotatably connected to the In the hole 421, the positioning member 42 is provided with a slot 4a communicating with the inner wall of the hole 421, and a clamping arm 4b is formed between the slots 4a. The balls 43 are respectively in contact with the positioning member 42 and the end surface of the output shaft 31 . The casing 1 is provided with a flange 11 , and the bolt 12 is connected to the casing 22 after passing through the flange 11 .

Referring to Fig. 5, an output shaft movement detection device includes a base 5, on which are provided protrusions 51, 52 with a trapezoidal cross-section and an orientation column 53, the end of the base 5 Dial gauges 61 and 62 are provided, the protrusion 51 is inserted between the two teeth of the worm 23, the side wall of the casing 1 is in contact with the outer wall of the orientation column 52, and the percentage The measuring heads of the gauges 61 , 62 are in contact with said housing 22 . The orientation column 53 includes a column body 531 and a sleeve 532 , and the sleeve tube 532 is rotatably connected to the column body 531 . There are two protrusions 51 , 52 and dial indicators 61 , 62 , and the protrusions 51 , 52 and dial indicators 61 , 62 are symmetrically distributed about the central plane of the base 5 . The base 5 includes a bottom plate 54 and a raised block 55, the raised block 55 is arranged on the bottom plate 54, a card slot 551 is provided on the raised block 55, and a card slot 551 is arranged in the card slot 551. block 56 , the top of the block 56 protrudes from the top surface of the raising block 55 , and the parts of the locking block 56 protruding from the top surface of the raising block 55 are the protrusions 51 , 52 . A balance weight 57 is also arranged on the bottom plate 51 , and the top plane of the balance weight 57 is equal to the top surface of the raising block 55 .

Referring to Figure 6, when the output shaft movement detection device detects the motor, the worm wheel 21 of the motor needs to be removed, and then the motor cover is placed on the output shaft movement detection device, and the protrusion 52 is snapped into the worm 23, and the casing The side wall of 1 is against the casing 532, the bottom surface of the casing 1 is in contact with the riser 55 and the balance weight 57 respectively, the front end of the casing 1 is against the dial gauge 62, and the reading of the dial gauge 62 is zeroed. Then hold the casing 1, push it back and forth, read the maximum reading and minimum reading of the dial indicator, the difference between the two is the value of the output shaft movement. Using this method can accurately read the amount of movement of the output shaft, which is not limited by the experience of workers.

Referring to Figure 7, the installation direction of the reducer 2 in Figure 7 is symmetrical to that of Figure 5, and it can also be detected on the output shaft movement detection device. The measurement method is the same as that described above, and will not be repeated here.

Protrusion 51,52 may wear and tear after using for a period of time, at this moment just can not guarantee the precision of measurement, can replace by the mode of block, to guarantee measurement precision, the top surface of balance weight 57 and pad 55 and machine The bottom surface of the casing 1 is in close contact with each other to ensure that when the casing is pushed back and forth, the casing will not shake, thereby ensuring the accuracy of measurement.

Claims (4)

1. the output shaft play checkout gear for motor, described motor comprises casing (1) and decelerator (2), rotor (3) is provided with in described casing (1), the output shaft (31) of described rotor (3) stretches out described casing (1), described decelerator (2) comprises worm gear (21), housing (22) and worm screw (23), described worm screw (23) is arranged on the end of output shaft (31), described worm gear (21) is rotatably connected in described housing (22), described casing (1) is fixed on described housing (22), described output shaft (31) stretches in described housing (22), described worm screw (23) is matched with described worm gear (21), the end of described output shaft (31) is provided with the cover (41) that an outer surface is sphere, a keeper (42) is provided with in described housing (22), described keeper (42) is arranged porose (421), described cover (41) is rotatably connected in described hole (421), described keeper (42) is provided with the groove (4a) communicated with described hole (421) inwall, clamp arm (4b) is formed between described groove (4a), described casing (1) is provided with flange (11), bolt (12) is through being connected on housing (22) after described flange (11), also comprise a ball (43), described ball (43) contacts with described keeper (42) and described output shaft (31) end face respectively, it is characterized in that: described checkout gear comprises pedestal (5), described pedestal (5) being provided with cross section is trapezoidal projection (51, 52) and one directed post (53), the end of described pedestal (5) is provided with dial gauge (61, 62), described projection (51, 52) one in snaps between two teeth of described worm screw (23), the sidewall of described casing (1) contacts with the outer wall of described directed post (53), described dial gauge (61, 62) gage outfit contacts with described housing (22), described projection (51, 52) and described dial gauge (61, 62) two are had, and described projection (51, 52) and described dial gauge (61, 62) central plane about described pedestal (5) is symmetrical.

2. output shaft play checkout gear according to claim 1, it is characterized in that: described directed post (53) comprises cylinder (531) and sleeve pipe (532), and described sleeve pipe (532) is rotatably connected on cylinder (531).

3. the output shaft play checkout gear for motor according to claim 1, it is characterized in that: described pedestal (5) comprises base plate (54) and keel (55), described keel (55) is arranged on described base plate (54), described keel (55) is provided with draw-in groove (551), fixture block (56) is provided with in described draw-in groove (551), the end face of described keel (55) is stretched out at the top of described fixture block (56), the part that described fixture block (56) stretches out the end face of described keel (55) is described projection (51, 52).

4. the output shaft play checkout gear for motor according to claim 3, it is characterized in that: described base plate (54) is also provided with balance weight (57), the top planes of described balance weight (57) and the end face of described keel (55) maintain an equal level.