Shaft cover

Abstract

The utility model discloses a shaft cover, which comprises a blocking part which blocks the end part of a motor shaft and is used for separating the motor shaft from a connecting wire, the middle part of the blocking part is provided with an inner space, the inner space accommodates the end part of the motor shaft, and the blocking part and the motor shaft are arranged at an interval; one end of the connecting piece is connected to the blocking part, the other end of the connecting piece is connected with the through groove in the rear end cover, and after connection, the connecting piece and the motor shaft are arranged at intervals; one end of the limiting piece is connected to the blocking part, the other end of the limiting piece abuts against the surface of one side of the rear end cover, the limiting piece and the connecting piece are connected with the rear end cover in a limiting mode, and the blocking part, the limiting piece and the motor shaft are located at intervals; the at least two missing parts are arranged among the limiting piece, the connecting piece and the blocking part and are used for separating the connecting piece from the limiting piece; therefore, the technical problems that interference and winding exist between the end part of one end of the motor shaft and the connecting wire, and the safety is poor are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of three-phase asynchronous motors, in particular to a shaft cover. Background Art

[0002] In three-phase asynchronous motors, in order to facilitate the disassembly, assembly and maintenance of the motor, a shaft flattening position is usually added to the end of the motor shaft at the non-output end of the motor (since the motor shaft end is usually cylindrical, the flattening position means that at least one plane is milled on the outer circle of one end of the motor shaft, which is convenient for using tools to clamp the motor shaft end during loading and unloading). Since the three-phase asynchronous motor has many connecting wires, and most of them are located in the non-output end direction of the motor, there is a risk of interference and entanglement between the exposed end of the motor shaft and the connecting wires during high-speed rotation of the motor. Utility Model Content

[0003] In view of the above-mentioned deficiencies existing in the related art, an object is to provide a shaft cover to solve the technical problems in the related art.

[0004] The technical solution to achieve the purpose is: a shaft cover, comprising:

[0005] A blocking portion blocks the end of the motor shaft and is used to separate the motor shaft from the connecting line. The middle portion of the blocking portion has an inner space, and the inner space accommodates the end of the motor shaft. The blocking portion and the motor shaft are spaced apart.

[0006] A connecting piece, one end of which is connected to the blocking part, and the other end of which is connected to the through slot on the rear end cover, and after connection, the connecting piece and the motor shaft are spaced apart;

[0007] A limiting member, one end of which is connected to the blocking part, and the other end of which is in contact with a surface of one side of the rear end cover, and is limitedly connected to the rear end cover together with the connecting member to position the blocking part, and the limiting member is spaced apart from the motor shaft;

[0008] And at least two missing parts are arranged between the limiting member, the connecting member and the blocking part to separate the connecting member from the limiting member.

[0009] Furthermore: the blocking part, the connecting part and the limiting part are made of plastic.

[0010] Further: the barrier portion includes: a side wall portion surrounding the end of the motor shaft; and an end surface portion connected to one end of the side wall portion, sealing the one end of the side wall portion, and covering the end of the motor shaft together with the side wall portion;

[0011] The inner space is formed between the side wall portion and the end surface portion.

[0012] Furthermore: the cross-sectional area of ​​the side wall portion gradually increases from the end surface portion toward the connecting piece, forming a tapered structure;

[0013] The cross-sectional area of ​​the inner space gradually increases from the end surface portion toward the connecting piece along the shape of the side wall portion, and also forms a tapered structure.

[0014] Furthermore: the number of the connecting members is two, and they are symmetrically connected to the blocking part;

[0015] There are two limiters, which are symmetrically connected to the blocking part;

[0016] After plane projection from bottom to top, the middle position between the connecting member and the limiting member forms an elliptical space;

[0017] The length dimension of the elliptical space is the spacing dimension between the connecting members, and the width dimension is the spacing dimension between the limiting members, and the length dimension is greater than the width dimension;

[0018] The cross-sectional area of ​​the elliptical space is larger than the cross-sectional area of ​​the motor shaft.

[0019] Further: the connecting member includes: a first connecting arm, one end of which is connected to the blocking portion, and extends from the connection with the blocking portion along the tapered structure of the blocking portion; and a first contact block, which is connected to the other end of the first connecting arm, and after the first connecting arm and the first contact block are inserted into the through slot, the first contact block abuts against the other side surface of the rear end cover, and clamps the rear end cover together with the limiting member;

[0020] The connecting member has a first state, a second state and a third state; the first state is the original expanded state when the connecting member is not inserted into the through slot; the second state is the bent state after the first connecting arm is pressed during the process of inserting the connecting member into the through slot; the third state is the returned expanded state of the first connecting arm after the connecting member is inserted into the through slot.

[0021] Furthermore: the width dimension m of the connecting member is not less than 1 / 2 of the width dimension n of the limiting member.

[0022] Further: the limiting member includes: a second connecting arm, one end of which is connected to the blocking part, extending from the connection with the blocking part along the conical structural shape of the blocking part; and a second contact block, connected to the other end of the second connecting arm, abutting against one side surface of the rear end cover, and clamping the rear end cover together with the connecting member.

[0023] Further: an included angle α is formed between the second connecting arm and the second contact block.

[0024] Furthermore: the length of the limiting member is smaller than the length of the connecting member;

[0025] There is a spacing dimension a between the lower surface of the second contact block and the upper surface of the first contact block.

[0026] Furthermore: the number of the missing parts is four, the shape is a "U"-shaped structure, and they are evenly distributed between the connecting member and the limiting member.

[0027] The above technical scheme is adopted, which has the following beneficial effects: a shaft cover, compared with the related technology, is provided with a blocking part, a connecting piece, a limiting piece and a missing part; a connecting piece and a limiting piece are provided at one end of the blocking part, the missing part separates the connecting piece and the limiting piece, is connected to the through groove on the rear end cover through the connecting piece, and the limiting piece abuts against the surface of one side of the rear end cover, so that the connecting piece and the limiting piece are connected to the rear end cover together, the blocking part is positioned, and the inner space in the middle part of the blocking part accommodates the motor shaft, thereby separating the motor shaft and the connecting line, preventing interference and entanglement between one end of the motor shaft and the connecting line, and having better safety, and the blocking part, the connecting piece and the limiting piece are spaced apart from the motor shaft, which will not affect the normal rotation of the motor shaft, and the structural reliability is better and the safety is better; thereby overcoming the technical problems of interference and entanglement between one end of the motor shaft and the connecting line and poor safety, achieving the technical effect of being able to prevent interference and entanglement between one end of the motor shaft and the connecting line and having better safety, and having practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a partial enlarged schematic diagram of the shaft cover and the rear end cover after installation;

[0029] Figure 2 is a schematic diagram of the structure of the shaft cover;

[0030] Figure 3 for Figure 2 The main view;

[0031] Figure 4 for Figure 3 Bottom view of

[0032] Figure 5 for Figure 3 AA section view in;

[0033] Figure 6 It is a schematic diagram of the structure of the connecting member on the shaft cover in the second state;

[0034] Figure 7 This is a schematic diagram of the structure after the shaft cover and the rear end cover are installed;

[0035] In the figure: 10. blocking part, 11. inner space, 12. side wall part, 13. end face part, 20. connecting piece, 21. first connecting arm, 22. first contact block, 30. limiting piece, 31. second connecting arm, 32. second contact block, 40. missing part, 50. elliptical space, 100. motor shaft, 200. connecting line, 300. rear end cover, 301. through groove. DETAILED DESCRIPTION

[0036] In order to make the content easier to understand, the following is a further detailed description based on specific embodiments and in conjunction with the accompanying drawings;

[0037] A shaft cover solves the technical problems of interference and entanglement between one end of the motor shaft and the connecting line in the related art, and poor safety. The shaft cover can be manufactured and used, and achieves the positive effect of preventing interference and entanglement between one end of the motor shaft and the connecting line, and good safety. The overall idea is as follows:

[0038] One implementation method:

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown; a shaft cover, comprising:

[0040] The blocking portion 10 blocks the end of the motor shaft 100 and is used to separate the motor shaft 100 and the connecting line 200. The middle part of the blocking portion 10 has an inner space 11, and the inner space 11 accommodates the end of the motor shaft 100. The blocking portion 10 and the motor shaft 100 are spaced apart.

[0041] A connecting member 20, one end of which is connected to the blocking portion 10, and the other end of which is connected to the through slot 301 on the rear end cover 300. After connection, the connecting member 20 is spaced apart from the motor shaft 100;

[0042] A limiting member 30, one end of which is connected to the blocking portion 10, and the other end of which is against a surface of one side of the rear end cover 300, and is limitedly connected to the rear end cover 300 together with the connecting member 20, and positions the blocking portion 10, and the limiting member 30 is spaced apart from the motor shaft 100;

[0043] and at least two missing parts 40, which are arranged between the limiting member 30, the connecting member 20 and the blocking portion 10, and separate the connecting member 20 from the limiting member 30;

[0044] Specifically, during implementation, a blocking part 10, a connecting piece 20, a limiting piece 30 and a missing part 40 are provided; a connecting piece 20 and a limiting piece 30 are provided at one end of the blocking part 10, and the missing part 40 separates the connecting piece 20 and the limiting piece 30, and is connected to the through groove 301 on the rear end cover 300 through the connecting piece 20, and the limiting piece 30 abuts against a surface of one side of the rear end cover 300, so that the connecting piece 20 and the limiting piece 30 are connected to the rear end cover 300 together. At the same time, the blocking part 10 is positioned, and the inner space 11 in the middle part of the blocking part 10 accommodates the motor shaft 100, so as to separate the motor shaft 100 and the connecting line 200, and prevent interference and entanglement between one end of the motor shaft 100 and the connecting line 200, and the safety is good. In addition, the blocking part 10, the connecting piece 20 and the limiting piece 30 are spaced apart from the motor shaft 100, and will not affect the normal rotation of the motor shaft 100, so the structural reliability is good and the safety is good.

[0045] Another embodiment:

[0046] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown; during implementation, the material of the blocking part 10, the connecting member 20 and the limiting member 30 is plastic, and is integrally injection molded, which not only has relatively good structural strength and can play the effect of separating the motor shaft 100 and the connecting line 200, but also has relatively light weight, is convenient for installation and disassembly, and has little impact on the total weight of the motor;

[0047] Another embodiment:

[0048] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown; when implemented, the barrier portion 10 includes: a side wall portion 12, surrounding the end of the motor shaft 100; and an end surface portion 13, connected to one end of the side wall portion 12, sealing one end of the side wall portion 12, and covering the end of the motor shaft 100 together with the side wall portion 12;

[0049] The inner space 11 is formed between the side wall portion 12 and the end surface portion 13;

[0050] The outer shape of the side wall portion 12 gradually increases in cross-sectional area from the end surface portion 13 to the connecting member 20, forming a tapered structure; the inner space 11 gradually increases in cross-sectional area from the end surface portion 13 to the connecting member 20 along with the outer shape of the side wall portion 12, also forming a tapered structure; the tapered structure is relatively beautiful, and the inner space 11 has enough space to accommodate the end of the motor shaft 100;

[0051] The end of the motor shaft 100 is covered by the barrier 10, and the end of the motor shaft 100 is accommodated in the inner space 11, so that the motor shaft 100 is separated from the connecting wire 200, and the connecting wire 200 does not interfere with or entangle the motor shaft 100. In addition, the barrier 10 and the end of the motor shaft 100 are spaced apart, and the barrier 10 does not collide with the motor shaft 100, and does not affect the normal rotation of the motor shaft 100, so the structural reliability is good and the safety is good.

[0052] Another embodiment:

[0053] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown; during implementation, the number of the connecting members 20 is two, which are symmetrically connected to the blocking portion 10;

[0054] There are two limiters 30, which are symmetrically connected to the blocking portion 10;

[0055] After plane projection from bottom to top, the middle position of the connecting member 20 and the limiting member 30 forms an elliptical space 50;

[0056] The length dimension of the elliptical space 50 is the spacing dimension between the connecting members 20, and the width dimension is the spacing dimension between the limiting members 30, and the length dimension is greater than the width dimension;

[0057] The cross-sectional area of ​​the elliptical space 50 is larger than the cross-sectional area of ​​the motor shaft 100;

[0058] The elliptical space 50 is provided, so that in the second state, the connection member 20 is bent after being pressed, and there is relatively sufficient bending space, which is conducive to the connection member 20 being smoothly inserted into the through groove 301, and in the third state, the connection member 20 is returned and stretched, and the first contact block 22 is stuck with the through groove 301, and the reliability of the connection is good;

[0059] Another embodiment:

[0060] like Figure 1 , Figure 2, Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown; when implemented, the connecting member 20 includes: a first connecting arm 21, one end of which is connected to the blocking portion 10, and extends from the connection with the blocking portion 10 along the tapered structure of the outer shape of the blocking portion 10; and a first contact block 22, which is connected to the other end of the first connecting arm 21. After the first connecting arm 21 and the first contact block 22 are inserted into the through groove 301, the first contact block 22 abuts against the other side surface of the rear end cover 300, and clamps the rear end cover 300 together with the limiting member 30;

[0061] After the first connecting arm 21 and the first contact block 22 are integrally formed, the outer shape is roughly an "L"-shaped structure;

[0062] The first connecting arm 21 extends from the connection with the barrier portion 10 along the tapered structure of the barrier portion 10, so that the first connecting arm 21 also has a tapered structure (such as Figure 3 As shown in FIG. 1 ), the appearance is relatively beautiful, and when the conical structure changes from the second state to the third state, the first connecting arm 21 has a rebound force to return to the direction of the through slot 301, which is conducive to the first contact block 22 being stuck with the through slot 301, and the reliability of the connection is better;

[0063] The first contact block 22 is an arc-shaped block, which is used to contact and lock with the through slot 301, and has good connection reliability;

[0064] The connecting member 20 has a first state, a second state and a third state; the first state is the original open state when the connecting member 20 is not inserted into the through slot 301; the second state is the bent state after the first connecting arm 21 is pressed during the insertion of the connecting member 20 into the through slot 301; the third state is the return open state of the first connecting arm 21 after the connecting member 20 is inserted into the through slot 301; the three state description is the installation process of the connecting member 20 and the through slot 301, starting from the first state, after the first connecting arm 21 is pressed, it is in the second state, inserted into the through slot 301, and after the insertion into the through slot 301, the first connecting arm 21 is released and is in the third state, thereby realizing the plug-in installation of the connecting member 20 and the through slot 301;

[0065] During disassembly, starting from the third state, the first connecting arm 21 is pressed and then in the second state, the first contact block 22 is disengaged from the through slot 301, the first connecting arm 21 and the first contact block 22 are pulled out from the through slot 301, the first connecting arm 21 is released, and the first state is returned to the first state, thus realizing the disassembly of the connecting member 20 and the through slot 301;

[0066] The width dimension m of the connecting member 20 is not less than 1 / 2 of the width dimension n of the limiting member 30. The width dimension setting makes the structural strength of the connecting member 20 and the limiting member 30 relatively high, reduces the probability of breakage, and has good structural reliability;

[0067] Another embodiment:

[0068] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown; when implemented, the limiting member 30 includes: a second connecting arm 31, one end of which is connected to the blocking portion 10, and extends from the connection with the blocking portion 10 along the conical structure of the outer shape of the blocking portion 10; and a second contact block 32, which is connected to the other end of the second connecting arm 31, abuts against a side surface of the rear end cover 300, and clamps the rear end cover 300 together with the connecting member 20;

[0069] The second contact block 32 is an arc-shaped block, which is used to abut against one side surface of the rear end cover 300. When the first contact block 22 abuts against the other side surface of the rear end cover 300, the abutment in two directions forms a clamping effect, which is conducive to the connection with the rear end cover 300;

[0070] The length of the stopper 30 is smaller than the length of the connector 20. There is a spacing dimension a between the lower surface of the second contact block 32 and the upper surface of the first contact block 22. The setting of the dimension makes it possible for the second contact block 32 to abut against one side surface of the rear end cover 300 while the first contact block 22 abuts against the other side surface of the rear end cover 300, thereby forming a clamping effect, which is conducive to connection with the rear end cover 300.

[0071] An angle α is formed between the second connecting arm 31 and the second contact block 32, for example, the angle α is 100°-130°, preferably 120°. The angle α is provided so that the second connecting arm 31 and the second contact block 32 are elastic, which is conducive to the second contact block 32 being able to be close to the rear end cover 300 when the second contact block 32 abuts against a side surface of the rear end cover 300, and is conducive to clamping the rear end cover 300 together with the connecting member 20;

[0072] Another embodiment:

[0073] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown; during implementation, the number of the missing parts 40 is four, and the shape is a "U"-shaped structure, which is evenly distributed between the connecting member 20 and the limiting member 30; the missing parts 40 are provided to separate the connecting member 20 and the limiting member 30, so that the connecting member 20 has elasticity and can change state, and is plugged and installed with the through groove 301. At the same time, when the state is changed, it will not affect the limiting member 30, and the structural reliability is good;

[0074] Regarding the motor shaft 100, the connecting line 200, the rear end cover 300 and the through groove 301:

[0075] See Figure 1 , Figure 7 The motor shaft 100, the connecting wire 200 and the rear end cover 300 are common structures in the prior art, which are not the inventive point of the present invention. They are only for better describing the present invention and facilitating understanding of the technical solution of the present invention. After seeing the disclosed content, ordinary technicians in this field can directly and unambiguously know how to set them without creative labor or excessive experiments.

[0076] The through groove 301 is a stepped through groove, and the stepped structure is conducive to blocking the first contact block 22 and forming a snap fit with the first contact block 22;

[0077] The working principle is as follows: a connector 20 and a stopper 30 are provided at one end of the blocking part 10, the missing part 40 separates the connector 20 and the stopper 30, and the connector 20 is connected to the through slot 301 on the rear end cover 300, and the stopper 30 abuts against a surface of one side of the rear end cover 300, so that the connector 20 and the stopper 30 are connected to the rear end cover 300 together, the blocking part 10 is positioned, and the inner space 11 in the middle part of the blocking part 10 accommodates the motor shaft 100, so as to separate the motor shaft 100 and the connecting line 200, and prevent interference and entanglement between one end of the motor shaft 100 and the connecting line 200, and the safety is good;

[0078] In the description, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicating directions or positional relationships are based on the positional relationships described in the drawings and are only for the convenience of description or simplified description, rather than indicating specific directions that must be possessed; the operation process described in the embodiments is not an absolute usage procedure and corresponding adjustments may be made in actual use;

[0079] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the relevant field; the words "first", "second" and similar words used in the specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not necessarily indicate a quantity limitation, but indicate the existence of at least one, which needs to be determined according to the content of the embodiment;

[0080] The above is only a preferred specific implementation method, but the protection scope is not limited to it. Any technician familiar with this technical field can make equivalent substitutions or changes based on the technical solutions and inventive concepts within the disclosed technical scope, which should be covered by the protection scope.

Claims

1. A shaft cover, characterized in that: include: a blocking portion (10) blocking the end of the motor shaft (100) and used to separate the motor shaft (100) and the connecting line (200); a middle portion of the blocking portion (10) having an inner space (11) for accommodating the end of the motor shaft (100); and a spacing between the blocking portion (10) and the motor shaft (100); A connecting member (20), one end of which is connected to the blocking portion (10), and the other end of which is connected to the through slot (301) on the rear end cover (300); after the connection, the connecting member (20) and the motor shaft (100) are spaced apart; a limiting member (30), one end of which is connected to the blocking portion (10), the other end of which is in contact with a side surface of the rear end cover (300), and is connected to the rear end cover (300) together with the connecting member (20) to position the blocking portion (10), the limiting member (30) being spaced apart from the motor shaft (100); and at least two missing portions (40) arranged between the limiting member (30), the connecting member (20) and the blocking portion (10) to separate the connecting member (20) from the limiting member (30).

2. A shaft cover according to claim 1, characterized in that: The material of the blocking part (10), the connecting part (20) and the limiting part (30) is plastic.

3. The shaft cover according to claim 1, characterized in that: The barrier portion (10) comprises: a side wall portion (12) surrounding the end of the motor shaft (100); and an end surface portion (13) connected to one end of the side wall portion (12), sealing one end of the side wall portion (12), and covering the end of the motor shaft (100) together with the side wall portion (12); The inner space (11) is formed between the side wall portion (12) and the end surface portion (13).

4. A shaft cover according to claim 3, characterized in that: The outer shape of the side wall portion (12) has a cross-sectional area that gradually increases from the end surface portion (13) toward the connecting piece (20), forming a tapered structure; The inner space (11) follows the outer shape of the side wall portion (12), and the cross-sectional area gradually increases from the end surface portion (13) toward the connecting piece (20), thereby also forming a tapered structure.

5. A shaft cover according to claim 4, characterized in that: The number of the connecting members (20) is two, and they are symmetrically connected to the blocking portion (10); The number of the limiting members (30) is two, and they are symmetrically connected to the blocking portion (10); After plane projection from bottom to top, the middle position between the connecting member (20) and the limiting member (30) forms an elliptical space (50); The length dimension of the elliptical space (50) is the spacing dimension between the connecting members (20), and the width dimension is the spacing dimension between the limiting members (30), and the length dimension is greater than the width dimension; The cross-sectional area of ​​the elliptical space (50) is greater than the cross-sectional area of ​​the motor shaft (100).

6. A shaft cover according to claim 5, characterized in that: The connecting member (20) comprises: a first connecting arm (21), one end of which is connected to the blocking portion (10), and extends from the connection with the blocking portion (10) along the conical structure of the outer shape of the blocking portion (10); and a first contact block (22), which is connected to the other end of the first connecting arm (21), and after the first connecting arm (21) and the first contact block (22) are inserted into the through groove (301), the first contact block (22) abuts against the other side surface of the rear end cover (300), and clamps the rear end cover (300) together with the limiting member (30); The connecting member (20) has a first state, a second state and a third state; the first state is an original expanded state when the connecting member (20) is not inserted into the through slot (301); the second state is a bent state after the first connecting arm (21) is pressed during the process of inserting the connecting member (20) into the through slot (301); the third state is a returned expanded state after the first connecting arm (21) is inserted into the through slot (301).

7. A shaft cover according to claim 6, characterized in that: The width dimension m of the connecting member (20) is not less than 1 / 2 of the width dimension n of the limiting member (30).

8. The shaft cover according to claim 7, characterized in that: The limiting member (30) comprises: a second connecting arm (31), one end of which is connected to the blocking portion (10), and extends from the connection with the blocking portion (10) along the conical structure of the outer shape of the blocking portion (10); and a second contact block (32), which is connected to the other end of the second connecting arm (31), abuts against a side surface of the rear end cover (300), and clamps the rear end cover (300) together with the connecting member (20).

9. The shaft cover according to claim 8, characterized in that: An included angle α is formed between the second connecting arm (31) and the second contact block (32).

10. The shaft cover according to claim 9, characterized in that: The length dimension of the limiting member (30) is smaller than the length dimension of the connecting member (20); There is a spacing dimension a between the lower surface of the second contact block (32) and the upper surface of the first contact block (22).

11. A shaft cover according to claim 1 or 10, characterized in that: The number of the missing parts (40) is four, the shape is a "U"-shaped structure, and they are evenly distributed between the connecting member (20) and the limiting member (30).

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