Eccentric grinding device and method for friction plate of clutch of steering gear box

Abstract

The eccentric grinding device comprises a base, a rubber plate, an eccentric disc, a transmission sleeve and an inner sleeve, the upper surface of the base is concavely provided with a grinding disc, the eccentric disc is connected with the rubber plate through the inner sleeve and arranged on the grinding disc, and the transmission sleeve penetrates through the circle center of the base, is connected with a key groove hole of the eccentric disc and is fixed through a motor output shaft. Through the structural design of the grinding disc, the eccentric disc, the rubber plate, the transmission sleeve and the inner sleeve and control over forward and reverse rotation of the motor, eccentric movement of the grinding device is achieved, a grinding method during manual grinding is replaced, grinding is uniform, multiple clutch friction plates can be ground at the same time, flying catkins are avoided, grinding sand can be recycled, and the operation environment is clean. And the safety of operators can be guaranteed, the grinding efficiency is high, and the safety in the grinding process is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical design, and in particular relates to an eccentric grinding device and method for a steering gear clutch friction plate. Background Art

[0002] The clutch friction plate is an important part for realizing the output of the motor of the input shaft of the steering gear. The motor output power is stably transmitted to the steering gear through the clutch friction plate, and the output torque is 78 N·m to 98 N·m. Therefore, there are relatively high grinding requirements for the clutch friction plate.

[0003] The grinding process flow of the clutch friction plate is divided into three parts, namely rough grinding, semi-finish grinding, and finish grinding. After each grinding, it is required that the contact area between adjacent clutch friction plates should reach 60% - 75% for rough grinding, 75% - 90% for semi-finish grinding, and 90% - 95% for finish grinding (that is, the flatness of the two planes after grinding is less than 0.02).

[0004] Currently, the mainstream grinding on the market is manual grinding. The advantage of manual grinding is that it can be adjusted in time. Among them, the single-piece clutch friction plate grinding takes 10 - 12 hours for rough grinding, 2 hours for semi-finish grinding, and 2 hours for finish grinding. This method has a long single-piece grinding time, low efficiency, and cannot avoid quality problems caused by human factors. Other non-manual existing technologies can only grind one clutch friction plate at a time, and the grinding efficiency is relatively low.

[0005] For example, the patent document with the publication number CN218254396U discloses a clutch plate grinding and polishing device, belonging to the technical field of grinding and polishing devices. It includes a bottom plate, on the top surface of the bottom plate is fixedly connected with a box body, inside the box body is provided with a motor, one end of the motor extends to be provided with a rotating shaft, the end of the rotating shaft away from the motor is fixedly connected with a convex platform, the side wall of the convex platform is provided with convex strips, the side wall of the rotating shaft is fixedly connected with a supporting plate, above the supporting plate is provided with a clutch plate main body, on one side of the box body is provided with an electric cylinder, above the electric cylinder is provided with a driving box, and the output shaft of the driving box is fixedly connected with a grinding roller and a polishing roller. It is convenient to use and can convert the grinding roller and the polishing roller according to needs, which is convenient for grinding and polishing operations. However, at the same time, it can only grind one clutch plate, and there will be flying fluff during the grinding process, the grinding environment is dirty and messy, and the flying fluff may fly into the eyes of the operator, posing an operation safety risk.

[0006] Therefore, in order to improve the rough grinding efficiency of the clutch friction plate grinding, promote the process of eliminating manual operation, reduce production costs, eliminate the flying of flying fluff, reduce the quality fluctuations caused by human factors, and improve operation safety, etc., it is necessary to design an eccentric grinding device for the steering gear clutch friction plate that can grind multiple clutch friction plates simultaneously, without flying fluff, with a clean operation environment, and can ensure the safety of operators. Summary of the Invention

[0007] In view of the problems existing in the prior art, the present invention provides an eccentric grinding device and method for the steering gear clutch friction plate.

[0008] The present invention is implemented as follows. An eccentric grinding device for the steering gear clutch friction plate includes a base, a rubber plate, an eccentric disc, a transmission sleeve and an inner sleeve. The upper surface of the base is recessed to form a grinding disc. The eccentric disc is connected to the rubber plate through the inner sleeve and is arranged on the grinding disc. The transmission sleeve passes through the center of the base and is connected to the keyway hole of the eccentric disc, and is fixed by the output shaft of the motor.

[0009] Further, grinding holes are uniformly arranged around the circumference of the rubber plate for placing the clutch friction plate and grinding weights.

[0010] Further, the number of grinding holes does not exceed 8.

[0011] Further, at most one clutch friction plate is placed in each grinding hole, and a grinding weight is placed above the clutch friction plate to fasten the clutch friction plate and prevent the clutch friction plate from falling off during grinding.

[0012] Further, the diameter of the grinding hole is 120 mm and the depth is 40 mm. The weight of the grinding weight is not less than 5 kg and the diameter is 120 mm.

[0013] Further, the eccentric disc further includes relief holes. The relief holes and the keyway holes are evenly distributed on the circumference to prevent the grinding sand from splashing due to being squeezed in the internal space.

[0014] Further, the number of relief holes does not exceed 3.

[0015] Further, the distance from the keyway hole to the center of the eccentric disc is 60 mm.

[0016] Further, a groove is recessed in the outer edge of the grinding disc for recovering the grinding sand and preventing the grinding sand from leaking out.

[0017] Another object of the present invention is to provide a grinding method for the eccentric grinding device of the steering gear clutch friction plate, including the following steps:

[0018] Before starting the motor, use a level to level the upper surface of the grinding disc until after putting in the grinding sand, the grinding sand will not flow obliquely to any side of the grinding disc;

[0019] After leveling, place the clutch friction plate to be ground in the grinding hole of the rubber plate in a horizontal state. Only one clutch friction plate is placed in one grinding hole, and then a grinding weight is placed on the placed clutch friction plate to make the clutch friction plate fit the upper surface of the grinding disc;

[0020] After starting the motor, the output shaft of the motor drives the keyway holes of the transmission sleeve and the eccentric disc to rotate, driving the eccentric disc, the inner sleeve and the rubber plate to make eccentric movements around the keyway holes in the grinding disc, so that the clutch friction plate and the grinding weight make the same eccentric movements;

[0021] Then, abrasive is added onto the grinding disc. The abrasive flows through the gaps of the grinding disc, making the clutch friction plate contact with the abrasive to form a grinding operation. Subsequently, by controlling the forward and reverse rotation of the motor, the grinding disc makes repeated forward and reverse movements, so that the clutch friction plate is repeatedly ground until the requirements are met.

[0022] In summary, the beneficial effects of the present invention are as follows:

[0023] (1) The grinding device of the present invention controls the forward and reverse rotation of the motor to make the grinding disc perform forward and reverse movements, so that the clutch friction plate is repeatedly ground in both forward and reverse directions, achieving the purpose of uniform grinding, and realizing the automation of grinding in the grinding process, reducing manual operation, and effectively avoiding quality fluctuations caused by inconsistent personnel capabilities or operation factors.

[0024] (2) Through the structural design of the eccentric disc, rubber plate, transmission sleeve and inner sleeve, the grinding device of the present invention realizes that the eccentric disc, inner sleeve and rubber plate make eccentric movements around the keyway holes in the grinding disc, making the clutch friction plate and the grinding weight make the same eccentric movements, replacing the grinding method in manual grinding and making the grinding uniform.

[0025] (3) The grinding device of the present invention can realize the synchronous grinding of up to 8 clutch friction plates by setting no more than eight grinding holes on the rubber plate and cooperating with the grinding weight. It can also grind clutch friction plates of various models by changing the hole positions and sizes on the rubber plate, with a wide range of applications and high grinding efficiency.

[0026] (4) Through the groove design on the edge of the grinding disc, the grinding device of the present invention can make the abrasive flow out from the center of the grinding disc to the outside, grind the grinding surface of the grinding disc, and can recycle the abrasive through this groove to prevent the leakage of the abrasive, causing waste and pollution.

[0027] (5) By setting relief holes on the eccentric disc, the grinding device of the present invention prevents the abrasive from splashing due to being squeezed in the internal space, improving the safety of the grinding process. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for description in the embodiments will be briefly introduced below.

[0029] Figure 1 It is the top view of the eccentric grinding device for the steering gear clutch friction plate in the embodiment of the present invention;

[0030] Figure 2It is the front view of the eccentric grinding device for the steering gear clutch friction plate in the embodiment of the present invention;

[0031] Figure 3 It is the sectional view of the A-A plane of the eccentric grinding device for the steering gear clutch friction plate in the embodiment of the present invention;

[0032] Explanation of the reference numerals in the attached drawings: 1 - base, 2 - rubber plate, 3 - eccentric disk, 4 - grinding weight, 5 - grinding disk, 6 - transmission sleeve, 7 - inner sleeve, 8 - relief hole, 9 - keyway hole, 10 - grinding hole, 11 - flat keyway, 12 - groove. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0034] Combined with Figures 1 - 3 As shown in the specific embodiment of a steering gear clutch friction plate eccentric grinding device and method provided by the present invention, through the structural design of the eccentric disk 3, rubber plate 2, transmission sleeve 6, and inner sleeve 7, the eccentric disk 3, inner sleeve 7, and rubber plate 2 are made to perform eccentric motion in the grinding disk 5 around the keyway hole 9, so that the clutch friction plate and the grinding weight 4 perform the same eccentric motion, replacing the grinding method during manual grinding, making the grinding uniform. By controlling the forward and reverse rotation of the motor, the grinding disk 5 is made to perform forward and reverse rotation, so that the clutch friction plate is repeatedly ground forward and backward, achieving the purpose of uniform grinding, and realizing the automation of grinding in the grinding process, reducing personnel operation, effectively avoiding quality fluctuations caused by personnel incompetence or operation factors. By setting no more than eight grinding holes 10 on the rubber plate 2, up to 8 clutch friction plates can be synchronously ground in cooperation with the grinding weight 4, and the grinding of clutch friction plates of various models can also be achieved by changing the hole positions and sizes on the rubber plate 2, with a wide range of applications and high grinding efficiency. Through the groove design on the edge of the grinding disk 5 and the relief hole 8 on the eccentric disk 3, the grinding sand can flow out from the center of the grinding disk 5 to the outside to grind the grinding surface of the grinding disk 5, and the grinding sand can be recycled through the groove 12, preventing the leakage of the grinding sand, causing waste and pollution, and preventing the grinding sand from splashing due to being squeezed in the internal space, improving the safety of the grinding process.

[0035] The specific scheme content is as follows:

[0036] An eccentric grinding device for a steering gear clutch friction plate according to an embodiment of the present invention includes a base 1, a rubber plate 2, an eccentric disk 3, a transmission sleeve 6 and an inner sleeve 7. The upper surface of the base 1 is recessed to form a grinding disk 5. The eccentric disk 3 is connected to the rubber plate 2 through the inner sleeve 7 and is arranged on the grinding disk 5. The transmission sleeve 6 passes through the center of the base 1 and is connected to the keyway hole 9 of the eccentric disk 3 and is fixed by the motor output shaft. Through the structural design of the eccentric disk 3, the rubber plate 2, the transmission sleeve 6 and the inner sleeve 7, the rotation of the motor output shaft causes the eccentric disk 3, the inner sleeve 7 and the rubber plate 7 to perform eccentric motion around the keyway hole within the grinding disk 3, enabling the clutch friction plate and the grinding counterweight to perform the same eccentric motion, replacing the grinding method during manual grinding, making the grinding uniform, and by controlling the forward and reverse rotation of the motor, the grinding disk can be controlled to perform forward and reverse rotation, so that the clutch friction plate is repeatedly ground in both directions, achieving the purpose of uniform grinding, and realizing the automation of grinding in the grinding process, reducing manual operation, effectively avoiding quality fluctuations caused by inconsistent personnel capabilities or operation factors; the motor output shaft and the transmission sleeve 6 are limited by a flat keyway 11, and the motor output shaft and the eccentric disk 3 are limited by the keyway hole 9. The flat keyway 11 and the keyway hole 9 are arranged on the same side.

[0037] In this embodiment, grinding holes 10 are evenly arranged around the circumference of the rubber plate 2 for placing the clutch friction plate and the grinding counterweight 4. The clutch friction plate is fastened by the grinding counterweight 4 to prevent the clutch friction plate from falling off during grinding.

[0038] In this embodiment, the number of the grinding holes 10 does not exceed 8. In cooperation with the grinding counterweight, up to 8 clutch friction plates with a diameter not greater than that of the grinding holes 10 can be ground simultaneously, improving the grinding efficiency. Also, the grinding of clutch friction plates of various models can be achieved by changing the size of the grinding holes 10 on the rubber plate 2.

[0039] In this embodiment, at most one clutch friction plate is placed in each grinding hole 10, and a grinding counterweight 4 is placed above the clutch friction plate to fasten the clutch friction plate and prevent the clutch friction plate from falling off during grinding.

[0040] In this embodiment, the diameter of the grinding hole 10 is 120 mm and the depth is 40 mm. The weight of the grinding counterweight 4 is not less than 5 kg and the diameter is 120 mm. The matching of the dimensions can improve the fastening degree and thus improve the grinding effect.

[0041] In this embodiment, the eccentric disk 3 further includes relief holes 8. The relief holes 8 and the keyway holes 9 are evenly distributed on the circumference, used to prevent the grinding sand from splashing due to being squeezed in the internal space.

[0042] In this embodiment, the number of the relief holes 8 does not exceed 3.

[0043] In this embodiment, the distance from the keyway hole 9 to the center of the eccentric disk 3 is 60 mm.

[0044] In this embodiment, a groove 12 is recessed in the outer edge of the grinding disc 5 for recycling abrasive grains and preventing the leakage of abrasive grains. The abrasive grains can flow out from the center of the grinding disc 5 to the outside, grind the grinding surface of the grinding disc 5, and the abrasive grains can be recycled through the groove 12 on the outer edge of the grinding disc 5 to prevent the leakage of abrasive grains, resulting in waste and pollution.

[0045] In this embodiment, the outer diameter of the rubber plate 2 is smaller than the diameter of the grinding disc 5, the inner diameter of the rubber plate 2 is the same as the outer diameter of the inner sleeve 7, the difference between the outer and inner radii of the rubber plate 2 is greater than the diameter of the grinding hole 10, the diameter of the grinding hole 10 is 120 mm, the inner diameter of the inner sleeve 7 is the same as the diameter of the eccentric disc 3, and the keyway hole 9 is inscribed with the eccentric disc 3; the keyway hole 9 protrudes upward, higher than the surface of the eccentric disc 3.

[0046] In an embodiment of the present invention, a grinding method for an eccentric grinding device of a steering gear clutch friction plate is provided, including the following steps:

[0047] Before starting the motor, use a level to level the upper surface of the grinding disc 5 until after the abrasive grains are put in, the abrasive grains will not flow obliquely to any side of the grinding disc 5, and the upper surface of the grinding disc 5 is the grinding surface;

[0048] After leveling, place the clutch friction plate to be ground in the grinding hole 10 of the rubber plate 2 in a horizontal state. Only one clutch friction plate is placed in one grinding hole 10, and then a grinding weight 4 is placed on the placed clutch friction plate to make the clutch friction plate fit with the upper surface of the grinding disc 5, and use the weight of the grinding weight 4 to press the clutch friction plate tightly so that the friction surface of the friction plate fits with the grinding surface of the grinding disc 5;

[0049] After starting the motor, the output shaft of the motor drives the keyway hole 9 of the transmission sleeve 6 and the eccentric disc 3 to rotate, driving the eccentric disc 3, the inner sleeve 7 and the rubber plate 2 to make eccentric movements in the grinding disc 5 around the keyway hole 9, so that the clutch friction plate and the grinding weight 4 make the same eccentric movements;

[0050] Then add abrasive grains to the grinding disc 5, and the abrasive grains flow to the outside through the gaps of the grinding disc 5, so that the clutch friction plate contacts the abrasive grains to form a grinding operation; subsequently, by controlling the forward and reverse rotations of the motor, the grinding disc 5 makes repeated forward and reverse movements, so that the clutch friction plate is repeatedly ground until the requirements are met.

[0051] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An eccentric grinding device for the friction plate of a steering gear clutch, characterized in that: It includes a base (1), a rubber plate (2), an eccentric disc (3), a transmission sleeve (6) and an inner sleeve (7). The upper surface of the base (1) is recessed to form a grinding disc (5). The eccentric disc (3) is connected to the rubber plate (2) through the inner sleeve (7) and is arranged on the grinding disc (5). The transmission sleeve (6) passes through the center of the base (1) and is connected to the keyway hole (9) of the eccentric disc (3), and is fixed by the motor output shaft.

2. The eccentric grinding device for the steering gear clutch friction plate according to claim 1, wherein Grinding holes (10) are evenly arranged around the circumference of the rubber plate (2) for placing clutch friction plates and grinding weights (4).

3. The eccentric grinding device for the steering gear clutch friction plate according to claim 2, wherein, The number of the grinding holes (10) does not exceed 8.

4. The eccentric grinding device for the steering gear clutch friction plate according to claim 3, characterized in that, At most one clutch friction plate is placed in each grinding hole (10), and a grinding weight (4) is placed above the clutch friction plate to fasten the clutch friction plate and prevent the clutch friction plate from falling off during grinding.

5. The eccentric grinding device for the steering gear clutch friction plate according to claim 4, characterized in that, The diameter of the grinding hole (10) is 120 mm and the depth is 40 mm. The weight of the grinding weight (4) is not less than 5 kg and the diameter is 120 mm.

6. The eccentric grinding device for the steering gear clutch friction plate according to claim 1, wherein, The eccentric disc (3) further includes relief holes (8). The relief holes (8) and the keyway hole (9) are evenly distributed on the circumference to prevent the grinding sand from splashing due to being squeezed in the internal space.

7. The eccentric grinding device for the steering gear clutch friction plate according to claim 5, characterized in that The number of the relief holes (8) does not exceed 3.

8. The eccentric grinding device for the steering gear clutch friction plate according to claim 1, characterized in that, The distance from the keyway hole (9) to the center of the eccentric disc (3) is 60 mm.

9. The eccentric grinding device for the steering gear clutch friction plate according to claim 1, characterized in that, A groove (12) is recessed at the outer edge of the grinding disc (5) for recovering the grinding sand and preventing the grinding sand from leaking out.

10. A grinding method for the grinding device of the steering gear clutch friction plate with eccentricity according to any one of claims 1-9, characterized in that, It includes the following steps: Before starting the motor, use a level to level the upper surface of the grinding disc (5) until after putting in the grinding sand, the grinding sand will not flow obliquely to any side of the grinding disc (5); After leveling, place the clutch friction plate to be ground in the grinding hole (10) of the rubber plate (2) in a horizontal state. Only one clutch friction plate is placed in one grinding hole (10), and then a grinding weight (4) is placed on the placed clutch friction plate to make the clutch friction plate fit the upper surface of the grinding disc (5); After starting the motor, the motor output shaft drives the transmission sleeve (6) and the keyway hole (9) of the eccentric disc (3) to rotate, driving the eccentric disc (3), the inner sleeve (7) and the rubber plate (2) to perform an eccentric motion in the grinding disc (5) around the keyway hole (9), so that the clutch friction plate and the grinding weight (4) perform the same eccentric motion; Then add grinding sand on the grinding disc (5). The grinding sand flows between the gaps of the grinding disc (5) to make the clutch friction plate contact the grinding sand, forming a grinding operation; Subsequently, by controlling the forward and reverse rotation of the motor, the grinding disc (5) repeatedly performs forward and reverse rotation movements, so that the clutch friction plate is repeatedly ground until the requirements are met.

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