Magnetic steel axial stress detection device

Abstract

The utility model relates to the technical field of starter stators, in particular to a magnetic steel axial stress detection device. Comprising a base, a support is arranged on the base, a sliding sleeve is vertically arranged on the support, a detection space is formed between the sliding sleeve and the base, a pressing rod capable of moving up and down along the sliding sleeve is arranged in the sliding sleeve, and a pressing block is coaxially arranged above the pressing rod. According to the utility model, the sleeve is vertically arranged on the support, the pressing rod is arranged in the sleeve, the pressing block is arranged above the pressing rod, and the lower end of the pressing rod is contacted with the magnetic steel during use according to the check bearing capacity of the magnetic steel and the set mass of the pressing block and the pressing rod, so that the gravity of the pressing block and the pressing rod is the check bearing capacity of the magnetic steel; therefore, the bearing capacity of the magnetic steel can be detected, and the detection is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of starter stators, in particular to a magnetic steel axial force detection device. Background Art

[0002] The motor is a device that realizes the conversion or transmission of electrical energy and mechanical energy based on the law of electromagnetic induction. At present, motors, especially permanent magnet brushless DC motors, are widely used in different fields such as industry, household appliances and vehicles due to their high energy efficiency and good speed regulation performance.

[0003] Figure 1 The invention shows a car starter stator, which includes a housing 1. The inner cavity of the housing 1 has a plurality of magnets 101 arranged along the circumference of the housing 1. The magnets 101 are fixed by a clamping ring 102. After the magnets are assembled, they must withstand axial thrust during the operation of the starter. Therefore, in order to ensure stable quality during production, the bearing capacity of the magnets must be tested. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a magnetic steel axial force detection device to improve the efficiency of the magnetic steel axial bearing capacity detection.

[0005] The technical solution adopted by the utility model to solve its technical problem is a magnetic steel axial force detection device, which includes a base, a bracket is arranged on the base, a sliding sleeve is vertically arranged on the bracket, a detection space is formed between the sliding sleeve and the base, a pressure rod which can move up and down along the sliding sleeve is arranged in the sliding sleeve, and a pressure block is coaxially arranged above the pressure rod.

[0006] Furthermore, a plurality of groups of rolling bodies are rollingly connected to the inner wall of the sliding sleeve, the plurality of groups of rolling bodies are arranged at intervals along the circumference of the sliding sleeve, and each group of rolling bodies includes at least two balls.

[0007] Furthermore, mounting grooves for mounting balls are arranged on the inner wall of the sliding sleeve, each group of mounting grooves is connected by an oil channel, an oil absorbing sponge is arranged in the oil channel, and an oil filling hole connected to the top of the oil channel is arranged on the outer peripheral surface of the sliding sleeve.

[0008] Furthermore, the bracket is connected to the sliding sleeve via a support block, and a guide mechanism for the support block to move up and down is provided on the bracket.

[0009] Furthermore, the guide mechanism comprises a long hole vertically arranged on the bracket, a bolt is arranged in the long hole, and a screw hole used in conjunction with the bolt is arranged on the support block.

[0010] Furthermore, the number of the long holes is at least two.

[0011] Furthermore, the number of bolts in the long hole is at least two.

[0012] Furthermore, the bracket is detachably connected to the base.

[0013] The beneficial effect of the utility model is as follows: by vertically arranging a sleeve on the bracket, installing a pressure rod in the sleeve, arranging a pressure block above the pressure rod, and setting the mass of the pressure block and the pressure rod according to the rated load-bearing capacity of the magnetic steel, when in use, the lower end of the pressure rod is in contact with the magnetic steel. At this time, the gravity of the pressure block and the pressure rod is the rated load-bearing capacity of the magnetic steel, so that the load-bearing capacity of the magnetic steel can be tested, and the detection is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the stator;

[0015] Figure 2 It is a structural schematic diagram of the utility model;

[0016] Figure 3 yes Figure 2 Rear view of

[0017] Figure 4 is a schematic diagram of the sliding sleeve;

[0018] Figure 5 yes Figure 4 A cross-sectional view of

[0019] Figure 6 It is a schematic diagram of the utility model during use.

[0020] Figure numerals: 1-housing; 101-magnet; 102-circlip; 2-base; 3-sleeve; 4-detection space; 5-pressure rod; 6-pressure block; 7-rolling body; 701-ball; 702-mounting groove; 703-oil channel; 704-oil absorption sponge; 705-oil filling hole; 8-bracket; 9-support block; 901-long hole; 902-bolt; 903-screw hole. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] like Figure 2-Figure 6As shown, the utility model magnetic steel axial force detection device includes a base 2, a bracket 8 is arranged on the base 2, a sliding sleeve 3 is vertically arranged on the bracket 8, a detection space 4 is formed between the sliding sleeve 3 and the base 2, a pressure rod 5 which can move up and down along the sliding sleeve 3 is arranged in the sliding sleeve 3, and a pressure block 6 is coaxially arranged above the pressure rod 5.

[0023] The upper and lower surfaces of the base 2 are flat, and the bracket 8 is installed on the upper surface of the base 2. The connection between the bracket 8 and the base 2 can be one-piece molding. If the bracket 8 and the base 2 are both made of steel, welding can also be used. The sleeve 3 is vertically arranged on the bracket 8, and the upper and lower openings of the sleeve 3 form a detection space 4 between the sleeve 3 and the base 2. When in use, the stator is placed in the detection space 4, and the magnetic steel 101 is opposite to the lower opening of the sleeve 3; the cross-sectional size of the pressure rod 5 is smaller than the cross-sectional size of the inner cavity of the sleeve 3, so that the pressure rod 5 can move up and down relative to the sleeve 3, and the pressure rod 5 can slide up and down along the sleeve 3; in order to prevent the pressure rod 5 from slipping out of the sleeve 3, a pressure block 6 is arranged above the pressure rod 5, and the cross-sectional size of the pressure block 6 is larger than the cross-sectional size of the inner cavity of the sleeve 3, so that the pressure rod 5 can be limited. Here, It should be noted that when in use, the length of the pressure rod 5 needs to be greater than the length from the upper end surface of the sleeve 3 to the magnetic steel 101 to avoid contact between the pressure block 6 and the upper surface of the sleeve 3, thereby reducing the detection force; the pressure block 6 and the pressure rod 5 jointly provide the detection force required for detecting the axial bearing capacity of the magnetic steel 101; for example, the single-piece magnetic steel 101 is required to withstand an axial thrust of 39.2N, so when the magnetic steel 101 is assembled, it must withstand an axial thrust of 39.8N during operation and after use of the starter. The axial thrust of 39.2N is 4kg in weight, so the sum of the gravity of the pressure block 6 and the pressure rod 5 is 4kg.

[0024] In order to reduce the influence of sliding friction on the detection force, further see Figure 4 and Figure 5 The inner wall of the sleeve 3 is rollingly connected with multiple groups of rolling bodies 7, which are arranged at intervals along the circumference of the sleeve 3, and each group of rolling bodies 7 includes at least two balls 701. The rolling bodies 7 are arranged on the inner wall of the sleeve 3, and the sliding friction between the pressure rod 5 and the sleeve 3 is changed to rolling friction, which reduces the friction force and improves the detection accuracy.

[0025] In order to make the rolling of the ball 701 more reliable, further see Figure 5The inner wall of the sleeve 3 is provided with mounting grooves 702 for mounting the balls 701. Each group of mounting grooves 702 is connected by an oil passage 703. An oil absorbing sponge 704 is provided in the oil passage 703. An oil injection hole 705 connected with the top of the oil passage 703 is provided on the outer peripheral surface of the sleeve 3. The number of each group of mounting grooves 702 is the same as the number of balls 701 of each group of rolling elements 7. The oil passage 703 allows lubricating oil to pass through. The oil absorbing sponge 704 is used to absorb and store lubricating oil. When the balls 701 rotate, the lubricating oil in the oil absorbing sponge 704 lubricates the balls 701. In order to more conveniently fill the oil absorbing sponge 704 with lubricating oil, the oil injection hole 705 is connected with the top of the oil passage 703, so that the lubricating oil can infiltrate from the top to the bottom of the oil absorbing sponge 704 under the action of gravity.

[0026] Since different types of starters have different stator specifications, in order to improve the applicability of the device, further participation Figure 2 and Figure 3 The bracket 8 is connected to the sleeve 3 through the support block 9, and a guide mechanism is provided on the bracket 8 for the support block 9 to move up and down. The guide mechanism can be an electric push rod, the fixed end of the electric push rod is fixed on the bracket 8, and the output end of the electric push rod is fixed on the support block 9, so that the position of the sleeve 3 can be adjusted by the guide mechanism, which is convenient for testing the bearing capacity of the magnetic steel 101 on the stator of the indefinite starter.

[0027] The use of electric push rods also requires an external power supply, which is not very convenient to use. Figure 2 and Figure 3 The guide mechanism includes a long hole 901 vertically arranged on the bracket 8, a bolt 902 is arranged in the long hole 901, and a screw hole 903 used in conjunction with the bolt 902 is arranged on the support block 9. The height of the long hole 901 determines the height of the support block 9 moving up and down. When adjusting the height, the bolt 902 is first loosened to allow the bolt 902 to move up and down in the long hole 901. When it moves to the working position, the bolt 902 is tightened to achieve the up and down adjustment of the support block 9.

[0028] In order to make the support block 9 more stable, further, Figure 2 and Figure 3 , the number of the long holes 901 is at least two.

[0029] In order to make the connection between the bracket 8 and the support block 9 more stable. Figure 2 and Figure 3 The number of the bolts 902 in the long hole 901 is at least two, and they are arranged at intervals along the length direction of the long hole 901.

[0030] In order to facilitate the removal of the bracket 8 from the base 2, the bracket 8 is further detachably connected to the base 2. The bracket 8 and the base 2 can be connected by screws or a clamping connection.

[0031] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A magnetic steel axial force detection device, comprising a base (2), wherein a bracket (8) is arranged on the base (2), and characterized in that: A sliding sleeve (3) is vertically arranged on the bracket (8), a detection space (4) is formed between the sliding sleeve (3) and the base (2), a pressure rod (5) is arranged inside the sliding sleeve (3) and can move up and down along the sliding sleeve (3), and a pressure block (6) is coaxially arranged above the pressure rod (5).

2. The magnetic steel axial force detection device according to claim 1, characterized in that: A plurality of groups of rolling bodies (7) are rollingly connected to the inner wall of the sliding sleeve (3), the plurality of groups of rolling bodies (7) are arranged at intervals along the circumference of the sliding sleeve (3), and each group of rolling bodies (7) includes at least two balls (701).

3. The magnetic steel axial force detection device according to claim 2, characterized in that: The inner wall of the sliding sleeve (3) is provided with mounting grooves (702) for mounting balls (701), each group of mounting grooves (702) is connected by an oil channel (703), an oil absorbing sponge (704) is provided inside the oil channel (703), and an oil injection hole (705) connected to the top of the oil channel (703) is provided on the outer peripheral surface of the sliding sleeve (3).

4. The magnetic steel axial force detection device according to claim 1, characterized in that: The bracket (8) is connected to the sliding sleeve (3) via a support block (9), and a guide mechanism for the support block (9) to move up and down is provided on the bracket (8).

5. The magnetic steel axial force detection device according to claim 4, characterized in that: The guide mechanism comprises a long hole (901) vertically arranged on the bracket (8), a bolt (902) is arranged in the long hole (901), and a screw hole (903) used in conjunction with the bolt (902) is arranged on the support block (9).

6. The magnetic steel axial force detection device according to claim 5, characterized in that: The number of the long holes (901) is at least two.

7. The magnetic steel axial force detection device according to claim 5, characterized in that: The number of the bolts (902) in the long hole (901) is at least two.

8. The magnetic steel axial force detection device according to claim 1, characterized in that: The bracket (8) is detachably connected to the base (2).

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