Carbon brush straight pin type pressure spring pressure testing device

Abstract

The utility model discloses a pressure testing device for a direct pin type pressure spring of a carbon brush, and belongs to the technical field of spring pressure detection. Comprising a mounting groove frame, a sliding frame, a locking structure, a simulation brush block, a connecting rod and a tension meter, a mounting groove is formed in the mounting groove frame, the sliding frame is slidably mounted at one end of the mounting groove, and the tension meter is fixedly mounted at the other end of the mounting groove; a straight pin type pressure spring clamping channel is arranged at the upper part of the sliding frame, the locking structure is arranged at the lower part of the sliding frame, and the sliding frame can be relatively fixed with the mounting groove frame through the locking structure; the simulation brush block is connected with the force measuring end of the tension meter through a connecting rod, a stress top end abutting against the compression spring is arranged on the simulation brush block, and scale marks are arranged on the simulation brush block. The technical problems that a traditional carbon brush straight pin type pressure spring pressure testing device is complex in structure and high in manufacturing cost are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of spring pressure detection, in particular to a carbon brush direct-sale type compression spring pressure testing device. Background Art

[0002] Carbon brushes are key components for transmitting electric energy between the dynamic and static parts of brushed motors or generators, so as to achieve uninterrupted and stable transmission of electric energy through the carbon brushes and the rotating slip rings on the rotor. The main components are carbon brush holders, slip rings, protective covers, carbon brush compression springs, carbon brushes and other components. The slip ring is fixed on the rotor of the motor or generator. It is made of steel with a hard texture and a smooth surface. The carbon brush compression spring presses on the carbon brush to give the carbon brush a certain pressure. The main material of the carbon brush is graphite, which has a soft texture and excellent electrical conductivity and wear resistance. Due to the continuous high-speed rotation of the slip ring in the working process, the contact surface of the carbon brush and the slip ring will continue to rub, and the carbon brush will continue to wear with long-term working friction. Usually, the carbon brush should be replaced in time when it is worn to 1 / 2 of its original length, otherwise it will cause insufficient pressure on the carbon brush and generate sparks, burn the slip ring and carbon brush, and even cause the motor or generator to stop. The direct-sale compression spring will move in the direction of the carbon brush as it wears and shortens, and will always fit the end of the carbon brush urgently to maintain the rated pressure on the carbon brush (for example, the technical requirements for the compression spring stroke of a generator in my workshop are 1.7kg-2.1kg when the pressure is within the range of 20mm-80mm), so that the carbon brush and the slip ring fit tightly and reliably, thus ensuring the stable and reliable transmission of electric energy between the carbon brush and the slip ring. Therefore, the compression spring is the main component to ensure the stable operation of the carbon brush and the slip ring.

[0003] In the process of working of carbon brushes and slip rings, the metal spring of the compression spring will be over-fatigued and the pressure will drop due to long-term operation and high temperature. Too low pressure of the compression spring will affect the normal operation of the carbon brushes and slip rings, and may even cause ignition and heat to burn the carbon brushes and slip rings due to too low pressure. Therefore, by testing the pressure of the compression spring, it is possible to promptly find the compression spring with excessive fatigue of the metal spring and insufficient pressure, and replace it in time to ensure the normal operation of the carbon brushes and slip rings, thereby ensuring the reliable operation of the brushed motor and generator. It is necessary to detect the pressure of the compression spring, such as the spring pressure detection device with publication number CN204101225U, which can realize the pressure detection of the compression spring, but its structure is complex and the cost is high. It is necessary to improve it to achieve structural refinement and reduce the cost while meeting the pressure detection of the compression spring. Summary of the invention

[0004] The purpose of the utility model is to provide a carbon brush direct-sale type compression spring pressure test device to solve the technical problems of complex structure and high cost of traditional carbon brush direct-sale type compression spring pressure test devices in view of the above problems.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0006] A carbon brush direct-pin compression spring pressure testing device comprises a mounting slot frame, a sliding frame, a locking structure, a simulated brush block, a connecting rod and a dynamometer; the mounting slot frame is provided with a mounting slot, the sliding frame is slidably mounted at one end of the mounting slot, and the dynamometer is fixedly mounted at the other end of the mounting slot; a direct-pin compression spring clamping track is provided on the upper part of the sliding frame, the locking structure is provided on the lower part of the sliding frame, and the sliding frame can be relatively fixed to the mounting slot frame through the locking structure; the simulated brush block is connected to the force measuring end of the dynamometer through the connecting rod, the simulated brush block is provided with a force-bearing top end that resists the compression spring, and the simulated brush block is provided with scale lines.

[0007] Furthermore, an oblong hole is provided at the lower part of the mounting slot frame, a threaded column is provided at the lower end of the sliding frame, the threaded column passes through the oblong hole, and a butterfly nut is screwed on the threaded column; the threaded column, the oblong hole and the butterfly nut form the locking structure.

[0008] Furthermore, a clamping plate is provided on the upper part of the clamping channel, and a clamping hole is provided on the clamping plate, and the upper protrusion of the direct-pin type compression spring can be clamped in the clamping hole.

[0009] Furthermore, one end of the clamping plate is folded upward to form a toggle portion.

[0010] Furthermore, a U-shaped connecting piece is provided at the front end of the simulated brush block, and the connecting piece is connected to the dynamometer through the connecting rod.

[0011] Furthermore, a clearance hole is provided in the middle of the sliding frame, and the simulated brush block passes through the clearance hole.

[0012] Furthermore, the simulation brush block is made of wood, plastic or PVC material.

[0013] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0014] 1. When the utility model is used, the carbon brush direct-sale compression spring is installed on the sliding frame, and the sliding frame is manually pushed to make the compression spring deform during the movement to generate different elastic forces. The tension caused by the elastic force on the simulated brush block is measured by a dynamometer to measure the elastic force of the compression spring. Based on the above, the utility model simplifies the entire device through the moving structure of the compression spring, and solves the technical problems of complex structure and high cost of traditional carbon brush direct-sale compression spring pressure testing devices.

[0015] 2. The utility model adopts an insertion and card-installation method. During installation, the direct pin end of the carbon brush direct pin compression spring is directly inserted so that the protrusion on the direct pin of the compression spring is stuck in the card hole, and the curled part of the compression spring is abutted against the simulated brush block. This can simplify the fixing structure of the compression spring and facilitate the disassembly and assembly of the compression spring. By providing a card plate with one end folded up, it is easy to move the entire sliding frame, thereby improving the convenience of use.

[0016] 3. The utility model can facilitate the placement of the curled portion of the compression spring by providing a U-shaped connecting piece; by providing a clearance hole on the sliding frame, the sliding frame can be sleeved on the simulated brush block through the clearance hole, thereby achieving the effect of the sliding frame sliding along the simulated brush block; the edge of the sliding frame can be used to align with the scale line on the simulated brush block, so as to facilitate checking the moving distance of the simulated brush block and the compression spring (i.e., the stroke of the compression spring), and facilitate accurate reading of the moving distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the sliding frame of the utility model.

[0020] In the attached drawings, 1-mounting slot frame, 2-sliding frame, 3-simulated brush block, 4-connecting rod, 5-tensile gauge, 6-compression spring, 7-mounting slot, 8-card channel, 9-scale line, 10-threaded column, 11-oblong hole, 12-dish nut, 13-card plate, 14-card hole, 15-toggle part, 16-U-shaped connecting piece, 17-allowance hole. DETAILED DESCRIPTION

[0021] The specific implementation of the utility model is further described below with reference to the accompanying drawings.

[0022] In the description of the present invention, it should be understood that the terms "center", "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] See also Figures 1 to 3 A carbon brush direct-sale compression spring pressure testing device comprises a mounting slot frame 1, a sliding frame 2, a locking structure, a simulated brush block 3, a connecting rod 4 and a dynamometer 5; a mounting slot 7 is provided on the mounting slot frame 1, the sliding frame 2 is slidably mounted at one end of the mounting slot 7, and the dynamometer 5 is fixedly mounted at the other end of the mounting slot 7; a direct-sale compression spring 6 card track 8 is provided on the upper part of the sliding frame 2, and the locking structure is provided at the lower part of the sliding frame 2, and the sliding frame 2 can be relatively fixed to the mounting slot frame 1 through the locking structure; the simulated brush block 3 is connected to the force measuring end of the dynamometer 5 through the connecting rod 4, and a force-bearing top end that resists the compression spring 6 is provided on the simulated brush block 3, and a scale line 9 is provided on the simulated brush block 3; specifically, the scale line 9 is provided at 20 mm and 80 mm for the stroke of the compression spring 6, and a scale line 9 is provided respectively; fixed blocks are provided at both ends of the dynamometer 5 to prevent the dynamometer 5 from sliding.

[0026] In this embodiment, an oblong hole 11 is provided at the lower portion of the mounting slot frame 1, and a threaded column 10 is provided at the lower end of the sliding frame 2. The threaded column 10 passes through the oblong hole 11, and a butterfly nut 12 is screwed on the threaded column 10; the threaded column 10, the oblong hole 11 and the butterfly nut 12 form a locking structure.

[0027] In this embodiment, a card plate 13 is provided on the upper part of the card channel 8, and a card hole 14 is provided on the card plate 13, and the upper protrusion of the direct-pin type compression spring 6 can be stuck in the card hole 14. By adopting the insertion card installation method, the direct pin end of the carbon brush direct-pin type compression spring 6 is directly inserted into the card during installation, so that the protrusion on the direct pin of the compression spring 6 is stuck in the card hole 14, and the curled part of the compression spring 6 is abutted against the simulated brush block 3, that is, the fixing structure of the compression spring 6 can be simplified, and the disassembly and assembly of the compression spring 6 can also be facilitated. In addition, one end of the card plate 13 is folded upward to form a toggle part 15. By providing a card plate 13 with one end folded upward, it is easy to toggle the movement of the entire sliding frame 2, thereby improving the convenience of use.

[0028] In this embodiment, a U-shaped connector 16 is provided at the front end of the simulated brush block 3, and the connector is connected to the dynamometer 5 via the connecting rod 4. The U-shaped connector 16 can facilitate the placement of the curled portion of the compression spring 6.

[0029] In this embodiment, a clearance hole 17 is provided in the middle of the sliding frame 2, and the simulated brush block 3 passes through the clearance hole 17. By providing the clearance hole 17 on the sliding frame 2, the sliding frame 2 can be mounted on the simulated brush block 3 through the clearance hole 17, so as to achieve the effect of the sliding frame 2 sliding along the simulated brush block 3; the edge of the sliding frame 2 can be used to align with the scale line 9 on the simulated brush block 3, so as to facilitate the checking of the moving distance of the simulated brush block 3 and the compression spring 6 (i.e., the stroke of the compression spring 6), thereby improving the convenience of use. In this embodiment, the simulated brush block 3 is made of wood, plastic or PVC material, which is light and has a certain hardness and is not easy to deform. During the test process, the weight of the simulated brush block 3 is small, and the friction between it and the sliding frame 2 is small, which has little effect on the test results.

[0030] This embodiment includes the following steps when used:

[0031] 1. Install the compression spring 6. Install the carbon brush direct pin compression spring 6 on the sliding frame 2, so that one end of the compression spring 6 is stuck in the card path 8, the curled part of the spring is against the simulated brush block 3, and the protrusion of the other end of the compression spring 6 is stuck in the card hole 14;

[0032] 2. Open the dynamometer 5, push the slide frame 2 by holding the toggle part 15, align the edge of the slide frame 2 with the 20mm scale line 9, and then lock the slide frame 2 by tightening the butterfly nut 12; at this time, the reading of the dynamometer 5 can be read, which is the 20mm stroke pressure value of the compression spring.

[0033] 3. Loosen the butterfly nut 12, push the sliding frame 2 by holding the toggle part 15, align the edge of the sliding frame 2 with the 80mm scale line 9, and then lock the sliding frame 2 by tightening the butterfly nut 12; at this time, the reading of the dynamometer 5 can be read, which is the 80mm stroke pressure value of the compression spring.

[0034] 4. Loosen the butterfly nut 12, reset the sliding frame 2, press the end of the compression spring 6 with the protrusion to make the protrusion disengage from the clamping hole 14, then take out the compression spring 6, close the dynamometer 5, and complete the pressure test of the compression spring 6.

[0035] By manually pushing the sliding frame 2, the compression spring 6 is deformed during its movement to generate different elastic forces, and the tension caused by the elastic force on the simulated brush block 3 is measured by the dynamometer 5 to measure the elastic force of the compression spring 6. Based on the above, the utility model simplifies the entire device through the moving structure of the compression spring 6, and solves the technical problems of complex structure and high cost of traditional carbon brush direct-sale compression spring 6 pressure testing devices.

[0036] The above description is a detailed description of the preferred feasible embodiment of the utility model, but the embodiment is not used to limit the scope of the patent application of the utility model. All equivalent changes or modified changes completed under the technical spirit suggested by the utility model should fall within the patent scope covered by the utility model.

Claims

1. A carbon brush direct-sale compression spring pressure test device, characterized in that: It includes a mounting slot frame, a sliding frame, a locking structure, a simulated brush block, a connecting rod and a dynamometer; the mounting slot frame is provided with a mounting slot, the sliding frame is slidably mounted at one end of the mounting slot, and the dynamometer is fixedly mounted at the other end of the mounting slot; a direct-pin type compression spring clamp is provided on the upper part of the sliding frame, the locking structure is provided on the lower part of the sliding frame, and the sliding frame can be relatively fixed to the mounting slot frame through the locking structure; the simulated brush block is connected to the force measuring end of the dynamometer through the connecting rod, the simulated brush block is provided with a force-bearing top end that resists the compression spring, and the simulated brush block is provided with scale lines.

2. A carbon brush direct-sale compression spring pressure testing device according to claim 1, characterized in that: An oblong hole is arranged at the lower part of the mounting slot frame, a threaded column is arranged at the lower end of the sliding frame, the threaded column passes through the oblong hole, and a butterfly nut is screwed on the threaded column; the threaded column, the oblong hole and the butterfly nut form the locking structure.

3. A carbon brush direct-sale compression spring pressure testing device according to claim 1, characterized in that: A clamping plate is arranged on the upper part of the clamping channel, and a clamping hole is arranged on the clamping plate. The upper protrusion of the direct-pin type compression spring can be clamped in the clamping hole.

4. A carbon brush direct-sale compression spring pressure test device according to claim 3, characterized in that: One end of the clamping plate is folded upward to form a toggle portion.

5. A carbon brush direct-sale compression spring pressure test device according to claim 1, characterized in that: A U-shaped connecting piece is arranged at the front end of the simulation brush block, and the connecting piece is connected to the dynamometer through the connecting rod.

6. A carbon brush direct-sale compression spring pressure test device according to claim 1, characterized in that: A clearance hole is arranged in the middle of the sliding frame, and the simulated brush block passes through the clearance hole.

7. A carbon brush direct-sale compression spring pressure test device according to claim 1, characterized in that: The simulation brush block is made of wood, plastic or PVC material.

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