Built-in motor power module

Abstract

The utility model provides a built-in motor power module, which relates to the technical field of power modules and comprises a harmonic speed reducing mechanism and an inner rotor motor which are coaxially integrated. The harmonic speed reducing mechanism comprises a cam shaft which is axially arranged in a penetrating manner; the rear cover sleeves the rear section of the cam shaft, and the rear cover and the cam shaft form radial support through a first bearing; the flexible gear sleeves the periphery of the rear cover, and the inner wall of the flexible gear and the front section of the cam shaft form elastic meshing transmission through a flexible bearing; the rigid gear covers the outer side of the flexible gear, and a crossed roller bearing is arranged between the rigid gear and the flexible gear to realize radial positioning; the flexible gear, the crossed roller bearing, the rigid gear, the first bearing, the flexible bearing and the second bearing are integrated at the front end of the rear cover to form a closed power output cavity; a motor containing cavity is formed in the rear end of the rear cover, the inner rotor motor is embedded into a cavity body of the motor containing cavity, and the inner rotor motor is connected with the cam shaft to achieve coaxial power coupling. The LED lamp has the advantages of being compact in structure, good in sealing performance and heat dissipation effect and light in weight.

Description

TECHNICAL FIELD

[0001] The utility model relates to power module technical field, especially a built-in motor power module. BACKGROUND

[0002] Motor and speed reducer (speed reducer motor) is the industrial transmission system high integration of power device of motor and speed reducer. The device converts the high speed low torque output of the motor into low speed high torque output through the gear meshing system, realizes the accurate matching of power parameters and load demand.

[0003] Harmonic reducer is a kind of speed reducer, and harmonic reducer is a kind of high-precision transmission device based on elastic deformation principle, and its core is composed of three components of rigid wheel, flexible wheel and wave generator. The rigid wheel is a rigid internal gear, the flexible wheel is a thin-walled external gear that can be elastically deformed, and the tooth number difference between the two is usually two, which is meshed through the same modulus tooth profile. The wave generator is the driving part, which makes the flexible wheel produce periodic radial deformation through the elliptical disc or roller structure, forms the tooth meshing on the long axis of the ellipse and the gap of the short axis, so as to realize the staggered tooth movement of the rigid wheel and the flexible wheel in rotation and complete power transmission.

[0004] The technology breaks through the rigid contact mode of traditional gear transmission, utilizes the controllable elastic deformation of flexible wheel to achieve transmission, has the characteristics of high precision (micron level positioning), large reduction ratio (single stage can reach 30-320), high bearing (unit volume bearing is 2.5 times more than that of ordinary speed reducer) and the like. Its compact structure is particularly prominent, the volume is reduced by 1 / 3 compared with the same level product, the material consumption is saved by 50%, and it is especially suitable for space limited scene. But the flexible wheel has material fatigue limit due to continuous elastic deformation, and the conventional service life is about 10,000 hours, which needs to avoid impact load.

[0005] But the power module composed of the transmission motor and the harmonic reducer has the problem of too large volume, which is not conducive to space optimization and performance improvement in precision machining equipment or automatic mechanical field. UTILITY MODEL CONTENTS

[0006] The utility model overcomes the shortcomings in the prior art, provides a built-in motor power module, which is compact in structure, good in sealing and suitable for application in light load field.

[0007] In order to solve the above technical problems, the utility model is realized by the following technical schemes:

[0008] A built-in motor power module, comprising a harmonic speed reducer mechanism and an internal rotor motor integrated coaxially;

[0009] The harmonic speed reducer mechanism comprises: a camshaft arranged axially through;

[0010] The rear cover is sleeved on the rear section of the camshaft, and the two are radially supported by the first bearing;

[0011] The flexible gear is sleeved on the outer periphery of the rear cover, and the inner wall of the flexible gear is elastically engaged with the front section of the camshaft through the flexible bearing;

[0012] The rigid gear is covered on the outer side of the flexible gear, and the rigid gear is radially positioned with the flexible gear through the cross roller bearing;

[0013] The front cover is fixed to the front end of the rigid gear, and the front cover is axially limited with the camshaft through the second bearing;

[0014] The flexible gear, the cross roller bearing, the rigid gear, the first bearing, the flexible bearing and the second bearing are integrated at the front end of the rear cover, and form a closed power output cavity;

[0015] The rear end of the rear cover is provided with a motor accommodating cavity, and the inner rotor motor is embedded in the cavity of the motor accommodating cavity, and the inner rotor motor is connected with the camshaft to realize coaxial power coupling.

[0016] Further, the motor accommodating cavity is provided with a flange type connector, the flange type connector is fixed on the camshaft, and the flange type connector is provided with an encoder.

[0017] Further, the rear end of the rear cover extends an annular boss, the annular boss is connected with a detachable sealing cover, and the encoder is positioned in the cavity formed by the annular boss and the sealing cover.

[0018] Further, the first bearing and the second bearing are rubber cover bearings.

[0019] Further, the closed power output cavity comprises at least five sealing structures:

[0020] A first O-ring is arranged between the engagement surface of the front cover and the rigid gear;

[0021] A second O-ring is arranged between the contact surface of the rigid gear and the cross roller bearing;

[0022] A third O-ring is arranged between the rear cover and the outer ring of the second bearing;

[0023] A fourth O-ring is arranged between the flexible gear and the cross roller bearing;

[0024] A fifth O-ring is arranged between the flexible gear and the rear cover.

[0025] Further, the cross roller bearing is provided with a lip oil seal.

[0026] Further, the rear cover, the flange type connector and the sealing cover are made of light heat dissipation metal materials.

[0027] Compared with the prior art, the utility model has the advantages that:

[0028] The utility model discloses the inner rotor motor passes through compact design and harmonic reducer mechanism integration, make the whole volume maintain the size of original harmonic reducer, solve the problem of the volume of the past motor plus reducer too big, wherein, the back cover and its related components select light weight heat dissipation metal material, in addition to the improvement heat dissipation effect, also make the whole weight lightening, improve the torsion weight ratio, because the product has the advantage of light weight and small size, therefore can be applied in light load field; adopt O ring and rubber cover bearing to reach the design of oil proof, reduce the design of oil seal and reduce the resistance of speed reducer operation. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings are included to provide a further understanding of the present utility model, together with the embodiments to explain the present utility model, and do not constitute limitations to the present utility model, and in the drawings:

[0030] Figure 1 It is the whole of the built-in motor power module Figure 1 ;

[0031] Figure 2 It is the whole of the built-in motor power module Figure 2 ;

[0032] Figure 3 It is the section view of the built-in motor power module;

[0033] Figure 4 It is the explosion of the built-in motor power module Figure 1 ;

[0034] Figure 5 It is the explosion of the built-in motor power module Figure 2 .

[0035] In the drawings:

[0036] 1, camshaft;2, back cover;3, first bearing;4, flexspline;5, flexible bearing;6, cross roller bearing;7, front cover;8, second bearing;9, inner rotor motor;10, flange type connecting piece;11, encoder;12, annular boss;13, sealing cover;14, first O ring;15, second O ring;16, third O ring;17, fourth O ring;18, fifth O ring;19, lip oil seal;20, rigid wheel;

[0037] A, closed power output cavity;B, motor accommodating cavity. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present utility model are described below in conjunction with the drawings, and it should be understood that the preferred embodiments described here are only for illustrating and explaining the present utility model, and are not used to limit the present utility model.

[0039] As Figures 1 to 5 shown, the utility model discloses an internal motor power module, including coaxial integration's harmonic reducer and inner rotor motor 9,

[0040] Wherein, harmonic reducer contains: the camshaft 1 of axial through arrangement, the back cover 2 of the rear section of sleeve setting in camshaft 1, the radial support of the first bearing 3 between them is formed, that is, make camshaft 1 can rotate relative to back cover 2. Including the flexible gear 4 of sleeve setting in the outer periphery of back cover 2, the inner wall of flexible gear 4 and the front section of camshaft 1 are formed through flexible bearing 5 and are elastically engaged transmission,

[0041] The rigid gear 20 of flexible gear 4 outside is covered, and the cross roller bearing 6 between it and flexible gear 4 is arranged to realize radial positioning, to make compact structure. Still including the front cover 7 of being fixed to the front end of rigid gear 20, and the axial limit of camshaft 1 through the second bearing 8 is formed, and the front cover 7 is fixedly connected on rigid gear 20 through bolt, and camshaft 1 can rotate relative to front cover 7 through the second bearing 8 arranged.

[0042] From Figure 3 seeing, in the internal motor power module, flexible gear 4, cross roller bearing 6, rigid gear 20, first bearing 3, flexible bearing 5 and second bearing 8 are integrated in the front end of back cover 2, and constitute closed power output cavity A, wherein, closed power output cavity A includes at least five sealing structures, including the following:

[0043] The first O-shaped ring 14 is arranged between the engagement surface of front cover 7 and rigid gear 20,

[0044] The second O-shaped ring 15 is arranged between the contact surface of rigid gear 20 and cross roller bearing 6,

[0045] The third O-shaped ring 16 is arranged between the outer ring of back cover 2 and second bearing 8,

[0046] The fourth O-shaped ring 17 is arranged between flexible gear 4 and cross roller bearing 6,

[0047] The fifth O-shaped ring 18 is arranged between flexible gear 4 and back cover 2.

[0048] The O-shaped ring is used to enhance the sealing between the two components, thereby enhancing the overall sealing of the closed power output cavity A.

[0049] The back end of back cover 2 is provided with motor accommodating cavity B, and the inner rotor motor 9 is embedded in the cavity of motor accommodating cavity B, and the inner rotor motor 9 is connected with camshaft 1 to realize coaxial power coupling.

[0050] Thus, from the above setting, the closed power output cavity A and the motor accommodating cavity B can be isolated from each other, which can prevent the penetration of oil from affecting the operation of the product.

[0051] The motor accommodating cavity B is provided with a flange connector 10 fixed on the camshaft 1 by bolt connection, and the flange connector 10 is provided with an encoder 11, and the rotation of the camshaft 1 drives the encoder 11 to rotate synchronously, so that the angular displacement of the camshaft 1 can be monitored in real time, and mechanical movement is converted into digital pulse signals or absolute position encoding, thereby providing accurate position information for the control system.

[0052] The rear end of the rear cover 2 extends an annular boss 12 connected with a detachable sealing cover 13, and the encoder 11 is positioned in the cavity formed by the annular boss 12 and the sealing cover 13; the annular boss 12 and the sealing cover 13 are detachably connected to the rear cover 2 by bolts, which facilitates the removal of the inner rotor motor 9 and the encoder 11 for maintenance or replacement, thereby improving the fault handling efficiency.

[0053] In the embodiment, the first bearing 3 and the second bearing 8 are rubber cap bearings, and the cooperation of the rubber cap bearings and the O-ring described above helps to enhance the sealing property and prevent oil penetration.

[0054] The cross roller bearing 6 is provided with a lip oil seal 19, which helps to enhance the sealing property.

[0055] In the embodiment, the rear cover 2, the flange connector 10 and the sealing cover 13 are made of light heat-dissipating metal materials, preferably aluminum alloy materials, which not only improve the heat-dissipating effect but also reduce the overall weight and improve the torque-to-weight ratio.

[0056] The inner rotor motor 9 is integrated with the harmonic reducer mechanism through compact design, so that the overall size is maintained as that of the original harmonic reducer, thereby solving the problem of large size of the motor and the harmonic reducer; the rear cover 2 and related components are made of light heat-dissipating metal materials, which not only improve the heat-dissipating effect but also reduce the overall weight and improve the torque-to-weight ratio; the product has the advantages of light weight and small size, and can be applied in light load fields; the O-ring and the rubber cap bearing are used to achieve oil-proof design, and the design of the oil seal reduces the resistance of the reducer in operation.

[0057] Finally, it should be noted that the above is only a preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model has been described in detail with reference to the embodiments, and for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently, but any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A built-in motor power module, characterized by, The harmonic reducer and the inner rotor motor (9) are coaxially integrated; The harmonic reducer comprises a camshaft (1) arranged axially through; A rear cover (2) is sleeved on the rear section of the camshaft (1), and a radial support is formed between the camshaft (1) and the rear cover (2) through a first bearing (3); A flexspline (4) is sleeved on the outer periphery of the rear cover (2), and an elastic meshing transmission is formed between the inner wall of the flexspline (4) and the front section of the camshaft (1) through a flexible bearing (5); A rigid spline (20) is coated on the outer side of the flexspline (4), and a radial positioning is achieved between the rigid spline (20) and the flexspline (4) through a cross roller bearing (6); A front cover (7) is fixed to the front end of the rigid spline (20), and an axial limiting is formed between the front cover (7) and the camshaft (1) through a second bearing (8); The flexspline (4), the cross roller bearing (6), the rigid spline (20), the first bearing (3), the flexible bearing (5) and the second bearing (8) are integrated on the front end of the rear cover (2), and a closed power output cavity (A) is formed; A motor accommodating cavity (B) is arranged at the rear end of the rear cover (2), and an inner rotor motor (9) is embedded in the cavity of the motor accommodating cavity (B), and the inner rotor motor (9) is connected with the camshaft (1) to realize coaxial power coupling.

2. The motor power module according to claim 1, wherein A flange type connecting piece (10) is arranged on the motor accommodating cavity (B), the flange type connecting piece (10) is fixed on the camshaft (1), and an encoder (11) is arranged on the flange type connecting piece (10).

3. The motor power module according to claim 1, wherein An annular boss (12) is extended at the rear end of the rear cover (2), the annular boss (12) is connected with a detachable sealing cover (13), and the encoder (11) is positioned in the cavity formed by the annular boss (12) and the sealing cover (13).

4. The motor power module according to claim 3, wherein The first bearing (3) and the second bearing (8) are rubber cover bearings.

5. The motor power module according to claim 3, wherein The closed power output cavity (A) comprises at least five sealing structures: A first O-shaped ring (14) is arranged between the joint surface of the front cover (7) and the rigid spline (20); A second O-shaped ring (15) is arranged between the contact surface of the rigid spline (20) and the cross roller bearing (6); A third O-shaped ring (16) is arranged between the rear cover (2) and the outer ring of the second bearing (8); A fourth O-shaped ring (17) is arranged between the flexspline (4) and the cross roller bearing (6); A fifth O-shaped ring (18) is arranged between the flexspline (4) and the rear cover (2).

6. The motor power module according to claim 5, wherein A lip-shaped oil seal (19) is arranged on the cross roller bearing (6).

7. The motor power module according to claim 3, wherein The rear cover (2), the flange type connecting piece (10) and the sealing cover (13) are made of light and heat-dissipating metal materials.

Images