Harmonic speed reducer

Abstract

The utility model relates to a harmonic speed reducer, which comprises a wave generator, a flexible spline, a circular spline and a bearing base, the outer peripheral surface of the wave generator and the inner peripheral surface of the flexible spline are assembled and connected together, and the outer peripheral surface of the flexible spline and the inner peripheral surface of the circular spline are engaged together; a threaded hole is formed in the bottom of the circular spline, a bottom through hole is formed in the bearing base, and a connecting screw penetrates through the bottom through hole and the threaded hole to connect the bearing base and the circular spline together. The flexible spline has the advantages that the flexible spline is formed by forging, so that the fatigue resistance is improved, and the service life is prolonged; and the service life is further prolonged by improving the smoothness and wear resistance of the spline.

Description

Technical Field

[0001] The utility model relates to a harmonic reducer, belonging to the field of reducers. Background Art

[0002] The existing harmonic reducer bottom bearing base is made of split type, and then sealed by a sealing ring. In the later use process, it was found that the seal was not complete and leaked, resulting in sluggishness during the deceleration process. Because it is split, it is locked with screws and pins, which will result in insufficient overall concentricity and overall rigidity. In addition, the bearing base on the market uses ball bearings inside, and there is a gap that leads to insufficient overall precision. The flexible spline in this device is generally processed by lathe. Due to the thin wall thickness, it is found that the bottom will crack during use, and the service life is not long. Utility Model Content

[0003] In order to overcome the defects of the prior art, the utility model provides a harmonic reducer. The technical solution of the utility model is:

[0004] A harmonic reducer comprises a wave generator, a flexible spline, a circular spline and a bearing base, wherein the outer circumference of the wave generator is assembled and connected with the inner circumference of the flexible spline, and the outer circumference of the flexible spline is engaged with the inner circumference of the circular spline; a threaded hole is provided at the bottom of the circular spline, and a bottom through hole is provided on the bearing base, and the bearing base is connected with the circular spline after a connecting screw passes through the bottom through hole and the threaded hole.

[0005] A guide keyway is arranged on the bearing base, and the guide keyway is arranged in a stepped shape as a whole. After the stepped surface of the guide keyway is assembled and connected with the inner hole of the flexible spline, the bearing base and the flexible spline are connected together through pins.

[0006] The bearing inside the bearing base adopts a vertical roller bearing.

[0007] The bearing inside the bearing base adopts a cross roller bearing.

[0008] The bearing inside the bearing base adopts a double-row roller bearing.

[0009] The advantages of the utility model are: the flexible spline is forged, which improves fatigue resistance and extends service life; the smoothness and wear resistance of the spline are increased, which further extends the service life. The original split bearing base is made into an integrated one with the circular spline, which enhances the consistency and rigidity of the overall device and improves the accuracy of the overall device; the bearing part inside the bearing base adopts vertical roller bearings, cross roller bearings and double-row roller bearings, and the torsional load strength is increased. Compared with the previous gap between the balls, the current vertical roller bearings, cross roller bearings and double-row roller bearings are tightly matched, which further improves the overall accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the main structure of the utility model.

[0011] Figure 2 yes Figure 1 Top view of the .

[0012] Figure 3 yes Figure 2 sectional view of . DETAILED DESCRIPTION

[0013] The present invention is further described below in conjunction with specific embodiments, and the advantages and features of the present invention will become clearer as the description proceeds. However, these embodiments are merely exemplary and do not constitute any limitation to the scope of the present invention. It should be understood by those skilled in the art that the details and forms of the technical solution of the present invention may be modified or replaced without departing from the spirit and scope of the present invention, but these modifications and replacements fall within the scope of protection of the present invention.

[0014] See also Figures 1 to 3 The utility model relates to a harmonic reducer, comprising a wave generator 1, a flexible spline 2, a circular spline 3 and a bearing base 4. The outer circumference of the wave generator 1 is assembled and connected with the inner circumference of the flexible spline 2, and the outer circumference of the flexible spline 2 is engaged with the inner circumference of the circular spline 3; a threaded hole is provided at the bottom of the circular spline 3, and a bottom through hole is provided on the bearing base 4. After the connecting screw passes through the bottom through hole and the threaded hole, the bearing base 4 is connected with the circular spline 3.

[0015] like Figure 3 As shown, a guide keyway 5 is provided on the bearing base 4, and the guide keyway 5 is arranged in a stepped shape as a whole. After the stepped surface of the guide keyway 5 is assembled and connected with the inner hole of the flexible spline 2, the bearing base 4 and the flexible spline 2 are connected together by pins.

[0016] The bearing inside the bearing base 4 is a vertical roller bearing.

[0017] The bearing inside the bearing base 4 adopts a cross roller bearing.

[0018] The bearing inside the bearing base 4 adopts a double-row roller bearing.

[0019] By providing vertical roller bearings or crossed roller bearings and double-row roller bearings, the torsional load strength is increased, and compared with the previous clearance between the balls, the vertical roller bearings, crossed roller bearings and double-row roller bearings are now closely matched, further improving the overall accuracy.

[0020] The working principle of the utility model is: when the utility model is assembled on the driving device, the rotating shaft is placed along the wave generator, and the fixed holes of the outer circle of the circular spline are connected and locked with the corresponding holes of the driving device. The inner hole of the wave generator is provided with a square keyway limiter. When the device is working: the rotation of the device driving shaft drives the bearing inside the bearing base to rotate and the ball bearing inside the wave generator to rotate, which drives the spline of the flexible spline workpiece to engage with the circular spline.

[0021] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A harmonic reducer, characterized in that: It includes a wave generator, a flexible spline, a circular spline and a bearing base. The outer circumference of the wave generator is assembled and connected with the inner circumference of the flexible spline, and the outer circumference of the flexible spline is engaged with the inner circumference of the circular spline. A threaded hole is provided at the bottom of the circular spline, and a bottom through hole is provided on the bearing base. After the connecting screw passes through the bottom through hole and the threaded hole, the bearing base is connected with the circular spline.

2. The harmonic reducer according to claim 1, characterized in that: A guide keyway is arranged on the bearing base, and the guide keyway is arranged in a stepped shape as a whole. After the stepped surface of the guide keyway is assembled and connected with the inner hole of the flexible spline, the bearing base and the flexible spline are connected together through pins.

3. The harmonic reducer according to claim 1, characterized in that: The bearing inside the bearing base adopts a vertical roller bearing.

4. The harmonic reducer according to claim 1, characterized in that: The bearing inside the bearing base adopts a cross roller bearing.

5. The harmonic reducer according to claim 1, characterized in that: The bearing inside the bearing base adopts a double-row roller bearing.

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