Novel cast copper rotor

Abstract

The utility model relates to the motor field, and more specifically relates to a novel cast copper rotor, comprising a rotor main body, an upper end ring, a lower end ring and a conducting bar, the rotor main body is an integrated structure, and the rotor main body is uniformly provided with shaft holes; the upper end ring and the lower end ring are arranged on the two sides of the rotor body respectively, clamping positioning holes are formed in the edges of the upper end ring and the lower end ring, and the clamping positioning holes are communicated with the edges of the upper end ring and the lower end ring respectively to form communication notches. The novel cast copper rotor is characterized in that one side of the conducting bar is provided with a limiter, and when the conducting bar sequentially passes through the clamping positioning hole of the upper end ring and the shaft hole of the rotor main body to reach the clamping positioning hole of the lower end ring, the limiter on the conducting bar is clamped on the communicating gap of the upper end ring. Due to the fact that the upper end ring and the lower end ring are both provided with the communicating notches, the limiting stoppers on the conducting bars can be better clamped in the communicating notches of the upper end ring for limiting, and fixing of the conducting bars is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of electric motors, and more particularly to a novel cast copper rotor. Background Art

[0002] The stator and rotor are both important components of the motor. Currently on the market, there are two main types of rotors: cast copper rotors and cast aluminum rotors.

[0003] Since the density of aluminum is lower than that of copper and its melting point is lower than that of copper, cast aluminum rotors are prone to broken bars in extreme cases, which will affect the normal operation of the motor. However, correspondingly, the price of cast aluminum rotors is relatively cheap.

[0004] The cast copper rotor is made by processing copper bars into a certain shape and size, and then squeezing the copper bars into the rotor body through an extrusion process, forming a tight fit with the axial hole in the rotor body. The upper and lower end rings are connected to the copper bars by pressing, welding or fixing with rivets. Due to the high melting point of copper, the cast copper rotor produced in this way can be used in different extreme environments.

[0005] However, after in-depth research, people found that the current cast copper rotor, since the upper and lower end rings and the guide bars are fixed by simple pressing and welding or rivets, although the copper bars are set in the rotor body by squeezing, but during long-term use, when the pressing is not firm, or the rivets are loose, or the welding quality is poor, the copper bars will move in the shaft hole and become desoldered. Therefore, how to strengthen the connection strength between the upper and lower end rings and the guide bars is exactly what people need.

[0006] Therefore, it is necessary to propose a new type of cast copper rotor to solve the above problems. Utility Model Content

[0007] The present invention aims to overcome at least one defect (shortcoming) of the above-mentioned prior art and provides a novel cast copper rotor.

[0008] In order to solve the above technical problems, the technical solution of the present utility model is as follows: a new type of cast copper rotor, comprising a rotor body, an upper end ring, a lower end ring and guide bars;

[0009] The rotor body is an integrated structure, and shaft holes are evenly arranged on the rotor body;

[0010] The upper end ring and the lower end ring are respectively arranged on both sides of the rotor body, and the edges of the upper end ring and the lower end ring are provided with clamping positioning holes, and the clamping positioning holes are respectively connected with the edges of the upper end ring and the lower end ring to form a connecting gap;

[0011] A limiter is provided on one side of the guide bar. When the guide bar passes through the clamping positioning hole of the upper end ring and the axial hole of the rotor body in sequence to reach the clamping positioning hole of the lower end ring, the limiter on the guide bar is clamped on the communicating notch of the upper end ring. In the present utility model, the rotor body is processed by integral cutting, so it is an integrated structure. In addition, the axial hole is cut on the rotor body. When the guide bar is inserted, the guide bar can achieve preliminary fixation of the upper end ring and the lower end ring. Since communicating notches are provided on both the upper end ring and the lower end ring, the limiter on the guide bar can be better The card is set on the connecting gap of the upper end ring to limit it, which strengthens the fixation of the guide bar. Since there is no limiter on the connecting gap of the lower end ring, when the lower end ring and the guide bar are welded and fixed, the welding material can also better fill the connecting gap of the lower end ring. Compared with the existing technology, it is no longer just a simple welding fixation on the end face of the guide bar, but it can be welded at the side end of the guide bar at the same time. In this way, both ends of the guide bar can be well connected to the upper and lower end rings, thereby better strengthening the connection strength between the upper and lower end rings and the guide bar.

[0012] Furthermore, the limiter is a limit card block, and the limit card block and the guide bar are an integrated structure. The integrated limit card block and guide bar can simplify the overall structure of the guide bar and the limit card block.

[0013] Furthermore, the cross section of the limit block is a rectangular structure.

[0014] Furthermore, the cross section of the limiting block is an isosceles trapezoidal structure.

[0015] Furthermore, both side ends of the guide bar are provided with gripping extension handles, and the upper end ring and the lower end ring are provided with guide grooves connected to the clamping positioning holes, and the guide grooves match the size of the gripping extension handles. The setting of the gripping extension handles facilitates the removal of the guide bar, and when the guide bar is fully inserted, the gripping extension handles on the guide bar can also be fully fitted on the guide grooves of the upper end ring or the lower end ring.

[0016] Furthermore, the guide groove and the grip extension handle are both semicircular. Since the guide groove and the grip extension handle are both semicircular, the upper end ring and the guide bar can be welded during subsequent processing.

[0017] Furthermore, the shaft hole and the snap-fit ​​positioning hole are both circular. In practical applications, the shaft hole and the snap-fit ​​positioning hole can also be selected into other shapes as needed, which are all within the protection scope of the present utility model.

[0018] Furthermore, a through hole is provided in the middle of the rotor body, and a key slot is provided on the through hole. The provision of the through hole and the key slot facilitates the installation of the rotor body.

[0019] Furthermore, the conductive bar is made of copper.

[0020] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0021] The new cast copper rotor disclosed by the present invention is processed by an integral cutting method. Therefore, it has an integrated structure. In addition, an axial hole is cut on the rotor body. When the guide bar is inserted, the guide bar can achieve preliminary fixation of the upper end ring and the lower end ring. Since connecting notches are provided on both the upper end ring and the lower end ring, the limiter on the guide bar can be better clamped on the connecting notch of the upper end ring for limiting, thereby strengthening the fixation of the guide bar. Since no limiter is provided on the connecting notch of the lower end ring, the welding material can also be better filled in the connecting notch of the lower end ring when the lower end ring and the guide bar are welded and fixed. Compared with the prior art, it is no longer just a simple welding fixation on the end face of the guide bar, but it can be welded at the side end of the guide bar at the same time. In this way, both ends of the guide bar can be well connected to the upper and lower end rings, thereby better strengthening the connection strength between the upper and lower end rings and the guide bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of a cast copper rotor in the prior art.

[0023] Figure 2 It is a structural schematic diagram of the cast copper rotor in the utility model after the guide bars and the upper and lower end rings are installed.

[0024] Figure 3 It is a structural diagram of the rotor body in the utility model.

[0025] Figure 4 It is a structural schematic diagram of the rotor body in the utility model from another angle.

[0026] Figure 5 It is a structural diagram of the upper end ring in the utility model.

[0027] Figure 6 It is a structural diagram of the lower end ring of the utility model.

[0028] Figure 7 It is a structural schematic diagram of the guide bar in the utility model.

[0029] Figure 8 It is an enlarged view of the end of the guide bar in the utility model.

[0030] In the figure, 1 is the rotor body, 2 is the upper end ring, 3 is the lower end ring, 4 is the guide bar, 5 is the shaft hole, 6 is the clamping positioning hole, 7 is the connecting gap, 8 is the limiter, 9 is the grip extension handle, 10 is the guide groove, 11 is the through hole, and 12 is the keyway. DETAILED DESCRIPTION

[0031] The accompanying drawings are for illustrative purposes only and are not to be construed as limitations on this patent. To better illustrate this embodiment, some components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the actual dimensions of the product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted from the accompanying drawings.

[0032] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installation" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, which can be considered as internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model. The technical solution of this utility model is further described below with reference to the accompanying drawings and embodiments.

[0033] like Figure 1 As shown, in the prior art, after the guide bars are placed in the shaft hole of the rotor body, the rotor body is pressed onto the upper end ring and the lower end ring for welding. However, such a structure has a complicated production process and a high defective rate. If the copper bars are not well fixed during welding, the copper bars are prone to movement and desoldering in the shaft hole after long-term use of the cast copper rotor.

[0034] like Figure 2-6As shown, a new type of cast copper rotor includes a rotor body 1, an upper end ring 2, a lower end ring 3 and a guide bar 4; the rotor body 1 is an integrated structure, and shaft holes 5 are evenly provided on the rotor body 1; the upper end ring 2 and the lower end ring 3 are respectively arranged on both sides of the rotor body 1, and the edges of the upper end ring 2 and the lower end ring 3 are provided with snap-fitting positioning holes 6, which are respectively connected with the edges of the upper end ring 2 and the lower end ring 3 to form a connecting gap 7; one side of the guide bar 4 is provided with a limiter 8, when the guide bar 4 passes through the snap-fitting positioning hole 6 of the upper end ring 2 and the shaft hole 5 of the rotor body 1 in turn to reach the snap-fitting positioning hole 6 of the lower end ring 3, the limiter 8 on the guide bar 4 is clamped on the connecting gap 7 of the upper end ring 2, in the utility model, the rotor body 1 is processed by integral cutting, so it is an integrated structure, in addition, the shaft hole 5 is cut on the rotor body 1, and when the guide bar 4 is inserted, the guide bar The cam 7 of the upper and lower end rings 2 is fixed to the upper and lower end rings 3, and the cam 7 of the lower and lower end rings 3 is fixed to the upper and lower end rings 2.

[0035] Among them, the limiter 8 is a limit card block, and the limit card block and the guide bar 4 are an integrated structure. The integrated limit card block and guide bar 4 can simplify the overall structure of the guide bar 4 and the limit card block. In the present utility model, the cross-section of the limit card block is a rectangular structure. In addition, the cross-section of the limit card block can also be an isosceles trapezoidal structure.

[0036] like Figure 7-8As shown, both ends of the guide bar 4 are provided with a gripping extension handle 9, and the upper end ring 2 and the lower end ring 3 are provided with a guide groove 10 connected to the clamping positioning hole 6. The guide groove 10 matches the size of the gripping extension handle 9. The setting of the gripping extension handle 9 facilitates the removal of the guide bar 4. When the guide bar 4 is fully inserted, the gripping extension handle 9 on the guide bar 4 can also be fully fitted on the guide groove 10 of the upper end ring 2 or the lower end ring 3. In the present utility model, the guide groove 10 and the gripping extension handle 9 are both semicircular. Since the guide groove 10 and the gripping extension handle 9 are both semicircular, Therefore, it is convenient to weld the upper end ring 2 and the guide bar 4 by welding during subsequent processing, wherein the axial hole 5 and the clamping positioning hole 6 are both circular. In actual application, the axial hole 5 and the clamping positioning hole 6 can also be selected into other shapes according to needs, which are all within the protection scope of the present utility model. The present utility model provides a through hole 11 in the middle of the rotor body 1, and a keyway 12 is provided on the through hole 11. The arrangement of the through hole 11 and the keyway 12 can facilitate the installation of the rotor body 1. In the present utility model, the guide bar 4 is made of copper material.

[0037] Example

[0038] In this embodiment, the rotor body is processed by an integral cutting method, so it is an integrated structure. When the cast copper rotor is installed, the upper end ring and the lower end ring are first placed on both sides of the rotor body, and the axial hole of the rotor body is connected to the clamping positioning holes of the upper end ring and the lower end ring. At this time, the guide bar is inserted into the clamping positioning hole of the upper end ring, the axial hole of the rotor body and the clamping positioning hole of the lower end ring in sequence. When the guide bar is inserted into the clamping positioning hole of the lower end ring, the limit block on the guide bar can be just clamped in the connecting notch on the edge of the upper end ring. In addition, since there are holding extension handles on both side ends of the guide bar, and guide grooves connected to the clamping positioning holes are provided on the upper end ring and the lower end ring, and the size of the guide grooves matches the size of the holding extension handles, the guide bars can be welded to the upper end ring one by one when the upper end ring is welded. In addition, when the guide bars are welded, the guide bars can also be reinforced in the connecting notch to enhance the welding strength of the top of the guide bar.

[0039] Since there is no limiter on the connecting notch of the lower end ring, when the lower end ring and the guide bar are welded and fixed, the guide bar can also be welded through the connecting notch of the lower end ring, which can also enhance the welding strength of the bottom of the guide bar.

[0040] In the figure, the positional relationship is described only for illustrative purposes and should not be understood as a limitation on this patent. Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A novel cast copper rotor, comprising a rotor body, an upper end ring, a lower end ring and guide bars, characterized in that: The rotor body is an integrated structure, and shaft holes are evenly arranged on the rotor body; The upper end ring and the lower end ring are respectively arranged on both sides of the rotor body, and the edges of the upper end ring and the lower end ring are each provided with a clamping positioning hole, and the clamping positioning hole is respectively connected with the edges of the upper end ring and the lower end ring to form a connecting gap; A limiter is provided on one side of the guide bar. When the guide bar passes through the clamping positioning hole of the upper end ring and the axial hole of the rotor body in sequence to reach the clamping positioning hole of the lower end ring, the limiter on the guide bar is clamped on the connecting notch of the upper end ring.

2. The novel cast copper rotor according to claim 1 is characterized in that: The limiter is a limit block, and the limit block and the guide bar are an integrated structure.

3. The novel cast copper rotor according to claim 2 is characterized in that: The cross section of the limiting block is a rectangular structure.

4. The novel cast copper rotor according to claim 2, characterized in that: The cross section of the limiting block is an isosceles trapezoidal structure.

5. The novel cast copper rotor according to claim 1 is characterized in that: Both ends of the guide bar are provided with grip extension handles, and both the upper end ring and the lower end ring are provided with guide grooves connected with the clamping positioning holes, and the guide grooves match the size of the grip extension handles.

6. The novel cast copper rotor according to claim 5, characterized in that: The guide groove and the grip extension handle are both semicircular.

7. The novel cast copper rotor according to claim 1 is characterized in that: The shaft hole and the clamping positioning hole are both circular.

8. The novel cast copper rotor according to claim 1 is characterized in that: A through hole is provided in the middle of the rotor body, and a key groove is provided in the through hole.

9. The novel cast copper rotor according to claim 1, characterized in that: The conducting bar is made of copper material.

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