Pressing die of electric brush

Abstract

The utility model belongs to the technical field of electric brush manufacturing, and particularly relates to an electric brush pressing die which comprises a base, a short rod with one end rotationally connected with the top face of the base, a connecting rod with the other end rotationally connected with the short rod, and a driving assembly in transmission connection with the other end of the connecting rod through a connecting assembly. The driving assembly drives one end of the connecting rod away from the short rod to move up and down; the middle of the connecting rod is rotationally connected with a wire clamping assembly used for clamping a wire, the bottom face of the wire clamping assembly is fixedly connected with an upper die, the middle of the top face of the base is slidably connected with a lower die, a wire hole is formed in the upper die, and the upper die is inserted into the lower die to press an electric brush during use. According to the utility model, the power output of the driving assembly is converted into the sliding pressing action of the upper die by utilizing the short rod-connecting rod lever principle, and the compaction pressure on materials is obviously improved through a mechanical reinforcement effect, so that the mechanical strength and the conductive performance of the electric brush are enhanced, and the durability of a finished product is further improved.

Description

Technical Field

[0001] This utility model belongs to the field of brush manufacturing technology, and in particular relates to a brush pressing mold. Background Technology

[0002] A brush is a conductive component that forms an electrical connection by making sliding contact with moving parts. It is one of the main components for conducting current between the rotating and stationary parts of a motor. It has good sliding contact characteristics, and different equipment has special requirements for the resistivity and contact resistance of the brush.

[0003] Patent CN216251568U discloses a pressing mold for an electric brush, including a worktable. A mounting base is provided on the upper surface of the worktable, and a mold cavity is provided on the upper surface of the mounting base. A mounting frame is provided on the lower surface of the worktable, and a motor is mounted on the mounting frame. A bidirectional lead screw is provided at the output shaft end of the motor. One end of the bidirectional lead screw passes through the worktable, and threaded sleeves are fitted at its upper and lower ends. A pressure rod is provided on one side of one threaded sleeve, and an upper punch is provided on the lower surface of the pressure rod. A lower punch is provided on one side of the other threaded sleeve. A wire hole is provided on the upper surface of the upper punch, and an electric brush wire is inserted into the wire hole. Both the upper and lower punches pass through the mold cavity. The motor is started by a control switch, causing the threaded sleeves on both sides to move towards each other. The threaded sleeves drive the upper and lower punches on both sides to move towards each other. The upper punch, carrying the electric brush wire, moves downwards. The electric brush wire is first inserted into the brush body material. When the upper and lower punches form the mold cavity, the electric brush wire and the brush body material become one. The existing technology provides a device that does not apply high pressure to the material for shaping, which can easily lead to insufficient pressure on the material, thereby reducing the durability of the brush.

[0004] Therefore, there is an urgent need for a brush pressing mold to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a pressing mold for electric brushes to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] A pressing mold for an electric brush includes a base. The top surface of the base is provided with a short rod at one end rotatably connected thereto, and the other end of the short rod is provided with a connecting rod rotatably connected thereto. The other end of the connecting rod is connected to a drive assembly via a connecting component. The drive assembly drives the end of the connecting rod away from the short rod to move up and down.

[0008] The middle of the connecting rod is rotatably connected to a wire clamping assembly for clamping wires. The bottom surface of the wire clamping assembly is fixedly connected to an upper mold, and the top surface of the base is slidably connected to a lower mold. The upper mold has a wire hole. In use, the upper mold is inserted into the lower mold to complete the pressing of the brush.

[0009] In one specific implementation, the drive assembly includes a drive motor, the fixed end of which is mounted on the base, and the output end of which is shaft-connected to a screw.

[0010] The connecting assembly includes a threaded sleeve, which is sleeved on the outside of the screw and threadedly engaged with the screw. A first protrusion is fixedly connected to the threaded sleeve, and the first protrusion is movably connected to the connecting rod.

[0011] In one specific implementation, a clearance groove is provided on the connecting rod, and the length and width of the clearance groove are both greater than the diameter of the first protrusion.

[0012] In one specific implementation, a shaped groove is provided in the middle of the top surface of the base, and a shaped slider adapted to the shaped groove is fixed to the bottom surface of the lower mold.

[0013] In one specific implementation, a top block is vertically slidably connected to the inner bottom surface of the lower mold. The top block is located below the material laid inside the lower mold and extends out of the bottom wall of the lower mold, slidably connected to the base.

[0014] In one specific implementation, the wire clamping assembly includes a fixing block, which is rotatably connected to the connecting rod. An mounting block is fixed to the outer side wall of the fixing block, and a slot is provided on the mounting block.

[0015] A wrench is slidably fitted on the top surface of the mounting block, and a spring is fixedly connected to one side of the wrench. The spring is placed in the slot. A locking block is fixedly connected to the top surface of the fixing block, and the locking block and the wrench have the same through hole at their close ends.

[0016] In one specific implementation, the through hole is a square hole.

[0017] Compared with the prior art, the present invention has the following advantages and technical effects:

[0018] In use, this invention involves first filling the lower mold with material, then inserting the upper mold into the lower mold. Activating the drive assembly causes the connecting rod to move up and down, simultaneously rotating the other end of the connecting rod, which in turn rotates the short rod. Since the upper mold is rotatably connected to the connecting rod, the rotation of the connecting rod causes the upper mold to slide within the lower mold, thus pressing the material to complete the brush fabrication. This invention utilizes the lever principle of the short rod-connecting rod to convert the power output of the drive assembly into the sliding pressing action of the upper mold. Through mechanical force amplification, the compaction pressure on the material is significantly increased. Simultaneously, the wire clamping assembly ensures precise positioning of the wire during pressing, working in conjunction with the lower mold to achieve a uniform and dense pressing effect. This effectively solves the technical defect of insufficient pressure in traditional bidirectional lead screw structures, improves the density uniformity and contact resistance stability of the brush product, thereby enhancing the mechanical strength and conductivity of the brush, and ultimately improving the durability of the finished product. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram illustrating all the structures of this utility model;

[0022] Figure 3 for Figure 2 Enlarged view of A in the middle;

[0023] The components are as follows: 1. Base; 2. Drive assembly; 3. Connecting rod; 4. Leaving groove; 5. Connecting assembly; 6. Wire; 7. Short rod; 8. Wire clamping assembly; 9. Upper mold; 10. Lower mold; 11. Irregular groove; 12. Top block; 201. Drive motor; 202. Screw; 501. First protrusion; 502. Screw sleeve; 801. Fixing block; 802. Mounting block; 803. Slot; 804. Wrench; 805. Spring; 806. Clamping block; 807. Square hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Reference Figures 1 to 3 This utility model discloses a pressing mold for an electric brush, comprising: a base 1, with a short rod 7 rotatably connected to one end of the top surface of the base 1, and a connecting rod 3 rotatably connected to the other end of the short rod 7. The other end of the connecting rod 3 is connected to a drive assembly 2 via a connecting component 5. The drive assembly 2 drives the end of the connecting rod 3 away from the short rod 7 to move up and down. The drive assembly 2 includes a drive motor 201, with the fixed end of the drive motor 201 mounted on the base 1, and the output end of the drive motor 201 shaft-connected to a screw 202. The connecting component 5 includes a threaded sleeve 502, which is sleeved on the outside of the screw 202 and threadedly engaged with the screw 202. A first protrusion 501 is fixedly connected to the threaded sleeve 502, and the first protrusion 501 is movably connected to the connecting rod 3 (it can rotate and slide, see reference). Figure 1 The connecting rod 3 has a relief groove 4, the length and width of which are both greater than the diameter of the first protrusion 501. When the screw 202 drives the screw sleeve 502 to move linearly, the first protrusion 501 adaptively displaces within the relief groove 4, ensuring efficient power transmission while avoiding motion interference. Compared with the traditional two-way screw structure, this significantly improves transmission accuracy and axial pressure stability. The compact threaded transmission system, combined with the lever-type connecting rod mechanism, creates a mechanical force amplification effect, allowing for the application of higher and more uniform pressing force, effectively solving the technical problem of insufficient material compaction.

[0027] A wire clamping assembly 8 for clamping the wire 6 is rotatably connected to the middle of the connecting rod 3. The wire clamping assembly 8 includes a fixing block 801, which is rotatably connected to the connecting rod 3. A mounting block 802 is fixedly attached to the outer wall of the fixing block 801, and a slot 803 is provided on the mounting block 802. A wrench 804 is slidably fitted on the top surface of the mounting block 802. A spring 805 is fixedly attached to one side of the wrench 804 and is placed in the slot 803. A clamping block 806 is fixedly attached to the top surface of the fixing block 801. The clamping block 806 and the wrench 804 have the same through hole at their adjacent ends. The through hole is a square hole 807. The wrench 804 slides along the mounting block 802 under the action of the spring 805 to quickly clamp / release the wire 6. The square hole 807 precisely restricts the circumferential displacement of the wire 6. The rotational connection between the fixing block 801 and the connecting rod 3 ensures that the wire remains aligned with the upper mold 9 during the pressing process, avoiding the problem of wire 6 being skewed or loosened due to vibration caused by traditional clamps. At the same time, the spring 805 adaptively compensates for the dimensional tolerance of the wire, which can ensure that wires of different specifications 6 can obtain a stable clamping force, greatly improving the contact consistency between the brush wire and the brush body.

[0028] The bottom surface of the wire clamping assembly 8 is fixedly connected to the upper mold 9, and the top surface of the base 1 is slidably connected to the lower mold 10. The upper mold 9 has wire holes, and during use, the upper mold 9 is inserted into the lower mold 10 to press the brush. The top surface of the base 1 has a shaped groove 11, and the bottom surface of the lower mold 10 is fixedly connected to a shaped slider that matches the shaped groove 11. The bottom surface of the lower mold 10 is vertically slidably connected to the top block 12, which is located below the material laid inside the lower mold 10. The top block 12 extends out of the bottom wall of the lower mold 10 and is slidably connected to the base 1. After the brush is made, the lower mold 10 is pulled to slide out of the base 1, and the operator uses their hand to hold the top block 12 and push the top block 12 upward to push the brush out of the lower mold 10 for easy demolding.

[0029] The working principle of this utility model is as follows:

[0030] In use, first fill the lower mold 10 with material, then insert the upper mold 9 into the lower mold 10. Start the drive motor 201, which drives the screw 202 to rotate. The rotation of the screw 202 causes the threaded sleeve 502 to slide on the screw 202 (assuming it slides upwards along the screw 202). Because the first protrusion 501 on the threaded sleeve 502 is engaged in the clearance groove 4 of the connecting rod 3, the sliding of the threaded sleeve 502 causes the connecting rod 3 to move clockwise. Since the upper mold 9 is inserted into the lower mold 10, the connecting rod 3... Rod 3 rotates around the origin with the protrusion on the fixed block 801. At this time, short rod 7 moves counterclockwise along the axis close to the base 1. Assuming it slides down along the screw 202, the movement directions of connecting rod 3 and short rod 7 are opposite (the upper mold 9 remains vertical). At this time, the other end of connecting rod 3 also rotates, driving short rod 7 to rotate. Since the upper mold 9 is rotatably connected to connecting rod 3, the rotation of connecting rod 3 will drive the upper mold 9 to slide in the lower mold 10, thus reciprocating, thereby pressing the material to complete the production of the brush.

[0031] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A pressing mold for an electric brush, characterized in that: Includes a base (1), the top surface of the base (1) is provided with a short rod (7) rotatably connected to one end thereto, the other end of the short rod (7) is provided with a connecting rod (3) rotatably connected to it, the other end of the connecting rod (3) is connected to the drive assembly (2) through a connecting component (5), the drive assembly (2) drives the connecting rod (3) to move up and down away from the end of the short rod (7); The middle part of the connecting rod (3) is rotatably connected to a wire clamping assembly (8) for clamping the wire (6). The bottom surface of the wire clamping assembly (8) is fixedly connected to an upper mold (9). The middle part of the top surface of the base (1) is slidably connected to a lower mold (10). The upper mold (9) has a wire hole. When in use, the upper mold (9) is inserted into the lower mold (10) to complete the pressing of the brush.

2. The pressing mold for an electric brush according to claim 1, characterized in that: The drive assembly (2) includes a drive motor (201), the fixed end of the drive motor (201) is mounted on the base (1), and the output end of the drive motor (201) is shaft-connected to a screw (202); The connecting assembly (5) includes a threaded sleeve (502), which is sleeved on the outside of the screw (202) and threadedly engaged with the screw (202). A first protrusion (501) is fixedly connected to the threaded sleeve (502), and the first protrusion (501) is movably connected to the connecting rod (3).

3. The brush pressing mold according to claim 2, characterized in that: The connecting rod (3) is provided with a relief groove (4), the length and width of which are both greater than the diameter of the first protrusion (501).

4. The brush pressing mold according to claim 1, characterized in that: The base (1) has a shaped groove (11) in the middle of its top surface, and the bottom surface of the lower mold (10) is fixed with a shaped slider that is compatible with the shaped groove (11).

5. The brush pressing mold according to claim 1, characterized in that: A top block (12) is vertically slidably connected to the inner bottom surface of the lower mold (10). The top block (12) is located below the material laid inside the lower mold (10). The top block (12) extends out of the bottom wall of the lower mold (10) and is slidably connected to the base (1).

6. The brush pressing mold according to claim 1, characterized in that: The wire clamping assembly (8) includes a fixing block (801), which is rotatably connected to the connecting rod (3). An mounting block (802) is fixedly connected to the outer side wall of the fixing block (801), and a slot (803) is provided on the mounting block (802). A wrench (804) is slidably fitted on the top surface of the mounting block (802). A spring (805) is fixedly connected to one side of the wrench (804). The spring (805) is placed in the slot (803). A locking block (806) is fixedly connected to the top surface of the fixing block (801). The locking block (806) and the wrench (804) have the same through hole at their close ends.

7. The brush pressing mold according to claim 6, characterized in that: The through hole is a square hole (807).

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