A concentricity calibration fixture for assembling rigid wheels in a harmonic reducer

Abstract

This utility model relates to the field of harmonic reducer manufacturing technology, and more particularly to a concentricity calibration fixture for assembling the rigid wheel of a harmonic reducer. The fixture includes a positioning component and a deformation component connected to the front end of the positioning component. The positioning component includes a rigid wheel positioning base plate connected to the rear end of the deformation component, a rigid wheel body connected to the front end of the rigid wheel positioning base plate, a cup-shaped flexible wheel installed inside the rigid wheel body, a fixing block installed at the front end of the cup-shaped flexible wheel, a crossed roller bearing connected to the front end of the cup-shaped flexible wheel, and a concentric screw installed in the middle of the crossed roller bearing. This utility model, by providing a deformation pre-reserved groove and a conical surface mating structure on the harmonic reducer, allows the pre-reserved groove to provide controllable elastic deformation space for the flange during press-fitting to compensate for errors, while the conical surface provides precise guidance. The combined effect of these two features enables the rigid wheel to automatically calibrate concentricity during assembly, reducing repeated manual adjustments and effectively improving overall assembly efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of harmonic reducer manufacturing technology, and in particular to a concentricity calibration fixture for assembling rigid wheels of a harmonic reducer. Background Technology

[0002] Harmonic reducers are classified into two types according to the flexible wheel structure: hat type and cup type. Hat type and cup type harmonic reducers are suitable for different installation requirements. They usually use a wave generator as the input shaft, and either the flexible wheel or the rigid wheel can be used as the fixed end or the output end. The reduction ratio and torque transmission functions are achieved through the difference in the number of teeth between the flexible wheel and the rigid wheel.

[0003] Traditional hat-shaped rigid wheel assembly fixtures mostly adopt a rigid press-fit structure, which presses the rigid wheel into the inner ring of the cross bearing through mechanical cooperation. However, due to the machining tolerances of the rigid wheel and the cross bearing and the elastic deformation of the material, the concentricity is easily out of tolerance during the press-fit process, which requires manual secondary correction and affects the assembly efficiency. Although some fixtures adopt a guide cone surface design, they cannot compensate for local deformation during the assembly process, making it difficult to meet the high precision requirements for the coaxiality of the rigid wheel and the cross bearing. Utility Model Content

[0004] To overcome the problem that existing harmonic reducers are prone to concentricity deviations due to rigid pressing by traditional hat-shaped rigid wheel assembly fixtures during assembly, and that the use of guide cone surface design is also difficult to compensate for deformation, thus affecting accuracy.

[0005] The technical solution of this utility model is: a concentricity calibration fixture for assembling rigid wheels of a harmonic reducer, comprising a positioning component and a deformation component connected to the front end of the positioning component;

[0006] The positioning assembly includes a rigid wheel positioning base plate connected to the rear end of the deformation assembly, a rigid wheel body connected to the front end of the rigid wheel positioning base plate, a cup-shaped flexible wheel installed inside the rigid wheel body, a fixing block installed at the front end of the cup-shaped flexible wheel, a cross roller bearing connected to the front end of the cup-shaped flexible wheel, a concentric screw installed in the middle of the cross roller bearing, and a skeleton oil seal installed at the front end of the cross roller bearing.

[0007] The deformation assembly includes a concentric flange of the rigid wheel connected to the front end of the rigid wheel positioning base plate, a concentric flange deformation reserved groove opened at the rear end of the rigid wheel concentric flange, a mounting screw reserved hole opened at the front end of the rigid wheel concentric flange, a positioning concentric flange connected to the front end of the rigid wheel concentric flange, a rigid wheel locking screw reserved hole opened at the front end of the positioning concentric flange, a concentric connecting screw reserved hole opened at the center of the front end of the positioning concentric flange, a positioning screw reserved hole opened at the front end of the positioning concentric flange, a flange connecting screw installed inside the positioning screw reserved hole, and a positioning flange deformation reserved groove opened at the rear end of the positioning concentric flange.

[0008] Preferably, the front end of the rigid wheel positioning base plate and the rear end of the rigid wheel body are both set as inclined surfaces, and the two inclined surfaces cooperate with each other.

[0009] Preferably, the cup-shaped flexible wheel is connected to the cross roller bearing via a fixing block, and the cross roller bearing is composed of an inner ring, an outer ring, and bearing rollers.

[0010] Preferably, the concentric screws are installed in the pre-drilled holes for the concentric connecting screws, and the concentric screws fix the positioning concentric flange, the rigid wheel concentric flange, and the rigid wheel positioning base plate together.

[0011] Preferably, the front and rear ends of the rigid wheel concentric flange are inclined structures, the rear end of the positioning concentric flange is an inclined structure, and the inclined surface of the front end of the rigid wheel concentric flange and the inclined surface of the rear end of the positioning concentric flange cooperate with each other.

[0012] Preferably, both the concentric flange deformation reserved groove and the positioning flange deformation reserved groove are evenly distributed around the circumference.

[0013] The beneficial effects of this utility model are:

[0014] This utility model features a deformation pre-reserved groove and a conical surface mating structure on the harmonic reducer. During the press-fitting process, the pre-reserved groove provides a controllable elastic deformation space for the flange to compensate for errors, while the conical surface plays a precise guiding role. The two work together to enable the rigid wheel to automatically calibrate concentricity during assembly, reducing repeated manual adjustments and effectively improving the overall assembly efficiency and accuracy. Attached Figure Description

[0015] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;

[0016] Figure 2 The diagram shown is a cross-sectional view of the present invention.

[0017] Figure 3 The diagram shown is a cross-sectional view of the deformation component of this utility model.

[0018] Figure 4 The diagram shown is a cross-sectional view of the positioning component of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Positioning component; 2. Deformation component; 101. Rigid wheel positioning base plate; 102. Rigid wheel body; 103. Cup-shaped flexible wheel; 104. Fixing block; 105. Crossed roller bearing; 106. Concentric screw; 107. Skeleton oil seal; 201. Rigid wheel concentric flange; 202. Concentric flange deformation reserved groove; 203. Mounting screw reserved hole; 204. Positioning concentric flange; 205. Rigid wheel locking screw reserved hole; 206. Concentric connecting screw reserved hole; 207. Positioning screw reserved hole; 208. Flange connecting screw; 209. Positioning flange deformation reserved groove. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] A concentricity calibration fixture for assembling rigid wheels in a harmonic reducer, based on Figures 1-4 As shown, it includes a positioning component 1 and a deformation component 2 connected to the front end of the positioning component 1;

[0022] The positioning assembly 1 includes a rigid wheel positioning base plate 101 connected to the rear end of the deformation assembly 2, a rigid wheel body 102 connected to the front end of the rigid wheel positioning base plate 101, a cup-shaped flexible wheel 103 installed inside the rigid wheel body 102, a fixing block 104 installed at the front end of the cup-shaped flexible wheel 103, a cross roller bearing 105 connected to the front end of the cup-shaped flexible wheel 103, a concentric screw 106 installed in the middle of the cross roller bearing 105, and a skeleton oil seal 107 installed at the front end of the cross roller bearing 105.

[0023] The deformation assembly 2 includes a rigid wheel concentric flange 201 connected to the front end of the rigid wheel positioning base plate 101, a concentric flange deformation reserved groove 202 opened at the rear end of the rigid wheel concentric flange 201, a mounting screw reserved hole 203 opened at the front end of the rigid wheel concentric flange 201, a positioning concentric flange 204 connected to the front end of the rigid wheel concentric flange 201, a rigid wheel locking screw reserved hole 205 opened at the front end of the positioning concentric flange 204, a concentric connecting screw reserved hole 206 opened at the center of the front end of the positioning concentric flange 204, a positioning screw reserved hole 207 opened at the front end of the positioning concentric flange 204, a flange connecting screw 208 installed inside the positioning screw reserved hole 207, and a positioning flange deformation reserved groove 209 opened at the rear end of the positioning concentric flange 204.

[0024] according to Figure 2 and Figure 3 As shown, the front end of the rigid wheel positioning base plate 101 and the rear end of the rigid wheel body 102 are both set as inclined structures, and the two inclined surfaces cooperate with each other.

[0025] It should be noted that, due to the cooperation of the two inclined surfaces, when the concentric flange 201 of the rigid wheel is pressed down, it causes the rear end of the concentric flange 201 of the rigid wheel to tighten and clamp the rigid wheel body 102. At the same time, this cooperation relationship also forms the basis for the initial concentric positioning.

[0026] according to Figure 2 and Figure 3 As shown, the cup-shaped flexible wheel 103 is connected to the crossed roller bearing 105 via the fixing block 104, and the crossed roller bearing 105 is composed of an inner ring, an outer ring, and bearing rollers.

[0027] It should be noted that the crossed roller bearing 105 provides high rigidity support for the cup-shaped flexure 103, and the crossed roller bearing 105 also cooperates with the rigid wheel body 102, thereby enabling the crossed roller bearing 105 to also achieve high coaxiality positioning.

[0028] according to Figures 1-4 As shown, the concentric screw 106 is installed in the concentric connecting screw reserved hole 206, and the concentric screw 106 fixes the positioning concentric flange 204, the rigid wheel concentric flange 201 and the rigid wheel positioning base plate 101 together.

[0029] It should be noted that after the positioning concentric flange 204, the rigid wheel concentric flange 201, and the rigid wheel positioning base plate 101 are initially aligned and positioned through their respective inclined surfaces, the concentric screws 106 are tightened. During the tightening process, the positioning concentric flange 204 is pulled downward, so that the inclined surfaces of the positioning concentric flange 204, the rigid wheel concentric flange 201, and the rigid wheel positioning base plate 101 are pressed together, causing the deformation reserved groove 209 of the positioning flange and the deformation reserved groove 202 of the concentric flange to deform. This results in the rear end of the positioning concentric flange 204 being completely fitted with the rigid wheel concentric flange 201 and reliably clamping and finally rigidly concentrically fixing the rigid wheel body 102. At the same time, the central area of ​​the positioning concentric flange 204 is precisely moved down to the bearing positioning position.

[0030] according to Figure 1 and Figure 4 As shown, the front and rear ends of the rigid wheel concentric flange 201 are inclined structures, the rear end of the positioning concentric flange 204 is also an inclined structure, and the inclined surface at the front end of the rigid wheel concentric flange 201 and the inclined surface at the rear end of the positioning concentric flange 204 cooperate with each other.

[0031] It should be noted that the rigid wheel concentric flange 201 and the positioning concentric flange 204 achieve initial docking and installation through the inclined surface structure. The inclined surface guides the precise positioning, ensuring that the two are quickly aligned with the center during assembly, laying the foundation for subsequent stable connection and improving assembly efficiency and concentricity accuracy.

[0032] according to Figure 1 and Figure 4As shown, both the concentric flange deformation reserved groove 202 and the positioning flange deformation reserved groove 209 are evenly distributed around the circumference.

[0033] It should be noted that the concentric flange deformation reserved groove 202 and the positioning flange deformation reserved groove 209 provide elastic deformation space for the flange; when the flange is compressed, a preset controllable elastic deformation will occur, which will cause the inclined surfaces to fit tightly and generate radial contraction force, thereby achieving precise concentric positioning through deformation.

[0034] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A concentricity calibration fixture for assembling rigid wheels in a harmonic reducer, characterized in that: It includes a positioning component (1) and a deformation component (2) connected to the front end of the positioning component (1); The positioning component (1) includes a rigid wheel positioning base plate (101) connected to the rear end of the deformation component (2), a rigid wheel body (102) connected to the front end of the rigid wheel positioning base plate (101), a cup-shaped flexible wheel (103) installed inside the rigid wheel body (102), a fixing block (104) installed at the front end of the cup-shaped flexible wheel (103), a cross roller bearing (105) connected to the front end of the cup-shaped flexible wheel (103), a concentric screw (106) installed in the middle of the cross roller bearing (105), and a skeleton oil seal (107) installed at the front end of the cross roller bearing (105). The deformation component (2) includes a rigid wheel concentric flange (201) connected to the front end of the rigid wheel positioning base plate (101), a concentric flange deformation reserved groove (202) opened at the rear end of the rigid wheel concentric flange (201), a mounting screw reserved hole (203) opened at the front end of the rigid wheel concentric flange (201), a positioning concentric flange (204) connected to the front end of the rigid wheel concentric flange (201), a rigid wheel locking screw reserved hole (205) opened at the front end of the positioning concentric flange (204), a concentric connecting screw reserved hole (206) opened at the center of the front end of the positioning concentric flange (204), a positioning screw reserved hole (207) opened at the front end of the positioning concentric flange (204), a flange connecting screw (208) installed inside the positioning screw reserved hole (207), and a positioning flange deformation reserved groove (209) opened at the rear end of the positioning concentric flange (204).

2. The concentricity calibration fixture for the rigid wheel assembly of a harmonic reducer according to claim 1, wherein: The front end of the rigid wheel positioning base plate (101) and the rear end of the rigid wheel body (102) are both set as inclined structures, and the two inclined surfaces cooperate with each other.

3. The concentricity calibration fixture for rigid wheel assembly of a harmonic reducer of claim 1, wherein: The cup-shaped flexible wheel (103) is connected to the cross roller bearing (105) via a fixed block (104), and the cross roller bearing (105) is composed of an inner ring, an outer ring, and bearing rollers.

4. The concentricity calibration fixture for rigid wheel assembly of a harmonic reducer of claim 1, wherein: The concentric screw (106) is installed in the concentric connecting screw pre-drilled hole (206), and the concentric screw (106) fixes the positioning concentric flange (204), the rigid wheel concentric flange (201) and the rigid wheel positioning base plate (101) together.

5. The concentricity calibration fixture for rigid wheel assembly of a harmonic reducer of claim 1, wherein: The front and rear ends of the rigid wheel concentric flange (201) are inclined structures, and the rear end of the positioning concentric flange (204) is an inclined structure. The inclined surface at the front end of the rigid wheel concentric flange (201) and the inclined surface at the rear end of the positioning concentric flange (204) cooperate with each other.

6. The concentricity calibration fixture for a rigid wheel assembly of a harmonic reducer according to claim 1, wherein: Both the concentric flange deformation reserved groove (202) and the positioning flange deformation reserved groove (209) are evenly distributed around the circumference.

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