Drum brake machining and assembling equipment

Abstract

The invention belongs to the technical field of drum brake machining and assembling, and particularly discloses drum brake machining and assembling equipment which comprises a fixing base, an inner positioning table is fixedly arranged on the fixing base, an auxiliary inner positioning mechanism is arranged on the portion, located on the inner side of the inner positioning table, of the fixing base, and a drum brake is assembled on the outer side of the inner positioning table. An outer positioning mechanism is arranged on the outer side of the drum brake, the auxiliary inner positioning mechanism comprises a first bevel gear, a plurality of second bevel gears are connected to the first bevel gear in a meshed mode, the center of each second bevel gear is in threaded connection with a screw, the outer end of each screw is fixedly connected with an ejector block, and the ejector blocks are embedded into the inner positioning table. The outer positioning mechanism comprises two opposite discs located below the fixing base, a plurality of first connecting rods are connected between the two discs, and the problem that an existing drum brake clamping device for drum brake machining and assembling is not firm enough in positioning is solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of drum brake processing and assembling, and particularly relates to a drum brake processing and assembling device. BACKGROUND

[0002] The drum brake is mainly composed of a brake drum, a brake shoe, a return spring, a brake bottom plate and the like. The brake drum is usually in a cylindrical shape, and the inner surface and the end surface thereof are key positions for processing and assembling. In the process of cutting, grinding and assembling of the brake drum, the brake drum needs to be clamped.

[0003] In the positioning of the conventional drum brake clamping device, the positioning is not tight enough, so that the drum brake cannot be stably supported and positioned in the processing process. When the processing equipment performs cutting, drilling and the like on the drum brake, the drum brake is prone to shaking or displacement. Once the drum brake shakes or displaces, the relative position between the processing tool and the drum brake changes, thereby causing the processing size to deviate, seriously affecting the processing precision, and finally possibly causing the drum brake product to not meet the design requirements and become a defective product. SUMMARY

[0004] The present application aims at the existing drum brake processing and assembling device to solve the problems in the background.

[0005] In order to solve the above technical problems, the present application provides the following technical scheme: a drum brake processing and assembling device, comprising a fixed seat, wherein an inner positioning table is fixedly arranged on the fixed seat, an auxiliary inner positioning mechanism is arranged on the inner side of the inner positioning table on the fixed seat, a drum brake is assembled on the outer side of the inner positioning table, and an outer positioning mechanism is arranged on the outer side of the drum brake.

[0006] The auxiliary inner positioning mechanism comprises a first bevel gear, a plurality of second bevel gears are engagedly connected to the first bevel gear, a screw rod is threadedly connected to the center of each second bevel gear, a top block is fixedly connected to the outer end of the screw rod, and the top block is embedded in the inner positioning table.

[0007] The outer positioning mechanism comprises two opposite discs below the fixed seat, a plurality of first connecting rods are connected between the two discs, one end of the inner side of each first connecting rod is connected with the disc, the outer end of each first connecting rod is hingedly connected with the lower end of a second connecting rod, the upper end of each second connecting rod is hingedly connected with the outer end of a third connecting rod, the inner end of each third connecting rod is fixedly connected with an outer positioning claw, a recess is formed in the inner surface of the lower segment of each outer positioning claw, and an auxiliary outer positioning device is slidably connected to the first connecting rod.

[0008] The application further discloses that the output end of a cylinder is arranged in the center of the two discs, the cylinder is fixedly arranged in a fixing sleeve, the output end of a motor is arranged in the center of the first bevel gear, the motor is fixedly arranged in the fixing seat, and a plurality of fine positioning columns are fixedly arranged below the fixing seat.

[0009] The application further discloses that the auxiliary outer positioning device comprises a floating clamping jaw, a spherical hinge is fixedly connected to the lower portion of the floating clamping jaw, a connecting plate is rotatably connected to the lower portion of the spherical hinge, a sliding block is fixedly connected to the lower portion of the connecting plate, a sliding groove is arranged below each sliding block on the first connecting rod, and the sliding groove and the sliding block are in sliding connection.

[0010] The application further discloses that the inner ends of the first connecting rods are arranged between the two circular track on the two discs, the first connecting rods are provided with an avoiding groove matched with the circular track, and a gap is arranged between the circular track and the avoiding groove.

[0011] The application further discloses that the outer surface of each second bevel gear is fixedly provided with a convex circular table, a first fixing frame is sleeved on each convex circular table, and the first fixing frame is fixedly arranged on the fixing seat.

[0012] The application further discloses that a plurality of convex tables are uniformly arranged around the fixing seat, and a through hole is arranged in each convex table.

[0013] The application further discloses that a first fixing shaft is arranged on the first connecting rod close to the disc, a second fixing frame is sleeved on the first fixing shaft, the upper portion of the second fixing frame is fixedly arranged on the bottom surface of the fixing seat, and an avoiding space matched with the second fixing frame is arranged on the first connecting rod.

[0014] The application further discloses that a second fixing shaft is arranged on each third connecting rod close to the outer positioning claw, the two ends of each second fixing shaft are arranged in a third fixing frame, and the third fixing frame is fixedly arranged on the fixing seat.

[0015] The application further discloses that the fixing seat is fixed on a machining platform, the machining platform is provided with a positioning hole matched with the fine positioning column, a threaded hole matched with the through hole and an avoiding space of the outer positioning mechanism.

[0016] In the initial state, the cylinder output end is elongated, the disc pulls the inner end of the first connecting rod upward, the outer part of the first connecting rod with the first fixed shaft as the fulcrum drives the second connecting rod to float downward, the inner part of the third connecting rod with the second fixed shaft as the fulcrum drives the outer positioning claw to float upward, the upper segment of the outer positioning claw inclines outward, meanwhile the slider slides in the sliding groove, the connection of the connecting piece and the ball hinge drives the floating claw to descend into the fixed seat, the outer positioning claw does not interfere with the drum brake, the drum brake is placed on the fixed seat, and the inner surface of the drum brake is tightly fitted with the outer surface of the inner positioning platform.

[0017] Then, the cylinder output end is contracted, the working principle is the same as the above-mentioned cylinder output end elongation, the direction is opposite, the upper segment of the outer positioning claw clamps the outer wall of the drum brake, and the upper segment of the floating claw extends outside the fixed seat to assist in clamping the outer wall of the drum brake.

[0018] The motor starts to drive the first bevel gear to rotate, the rotation of the first bevel gear engages the second bevel gear to rotate, and the rotation of the second bevel gear drives the threaded screw rod to push outward until the screw rod tightly abuts the top block against the inner wall of the drum brake.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] (1) By setting the auxiliary inner positioning mechanism, the motor drives the first bevel gear to rotate, drives a plurality of second bevel gears engaged with it to rotate, and further drives the threaded screw rod to push the top block outward, so that the top block is tightly abutted against the inner wall of the drum brake. The outer surface of the top block is matched with the inner surface of the drum brake, which can be well fitted. A pressure sensor can be provided, which stops driving when a certain pressure is reached, ensuring that the drum brake is stably supported and positioned, effectively avoiding the machining size deviation caused by the drum brake shaking or displacement during machining, improving the machining precision, and reducing the scrap rate.

[0021] (2) By setting the outer positioning mechanism, the cylinder drives the disc to rise and fall, and through the linkage of the first connecting rod, the second connecting rod and the third connecting rod, the upper segment of the outer positioning claw clamps the outer wall of the drum brake, and the floating claw assists in clamping the outer wall of the drum brake. This design can realize reliable clamping of the outer wall of the drum brake, and cooperate with the auxiliary inner positioning mechanism to accurately position and clamp the drum brake from the inside and outside, further improve the stability and positioning accuracy of the drum brake during machining and assembly, and ensure the machining and assembly quality. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0023] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of another view of the overall structure of an embodiment of the present application;

[0025] Figure 3 is a sectional view of the overall structure of an embodiment of the present application;

[0026] Figure 4 is a schematic diagram of an auxiliary inner positioning mechanism of an embodiment of the present application;

[0027] Figure 5 is a schematic diagram of an enlarged view of region A of an embodiment of the present application;

[0028] Figure 6 is a schematic diagram of an enlarged view of region B of an embodiment of the present application;

[0029] In the figure: 1, fixed seat; 11, boss; 12, through hole; 13, first fixed frame; 14, second fixed frame; 15, third fixed frame; 2, inner positioning table; 3, auxiliary inner positioning mechanism; 31, first bevel gear; 32, second bevel gear; 321, convex circular table; 33, screw rod; 34, top block; 4, outer positioning mechanism; 41, disc; 411, circular track; 42, first connecting rod; 421, first fixed shaft; 422, avoidance space; 423, avoidance groove; 424, sliding groove; 43, second connecting rod; 44, auxiliary outer positioning; 441, floating clamping jaw; 442, ball hinge; 443, connecting piece; 444, sliding block; 45, third connecting rod; 451, second fixed shaft; 46, outer positioning claw; 5, air cylinder; 51, fixed sleeve; 6, motor; 7, fine positioning column; 8, drum brake. DETAILED DESCRIPTION

[0030] The technical solutions of the present application will be further described in detail below with reference to preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0031] Reference Figures 1 to 6 , the embodiments of the present application provide a drum brake machining and assembling device, as shown in Figure 1 The drum brake machining and assembling device comprises a fixed seat 1, an inner positioning table 2 is fixedly arranged on the fixed seat 1, an auxiliary inner positioning mechanism 3 is arranged on the inner side of the inner positioning table 2 of the fixed seat 1, a drum brake 8 is assembled on the outer side of the inner positioning table 2, and an outer positioning mechanism 4 is arranged on the outer side of the drum brake 8.

[0032] As Figure 1 and Figure 4 shown, the auxiliary inner positioning mechanism 3 comprises a first bevel gear 31, a plurality of second bevel gears 32 are connected in meshing connection on the first bevel gear 31, a screw rod 33 is threadedly connected at the center of each second bevel gear 32, a top block 34 is fixedly connected to the outer end of the screw rod 33, and the top block 34 is embedded in the inner positioning table 2. It is worth noting that the outer surface of the top block 34 is matched with the inner surface of the drum brake 8, that is, the two can be well fitted.

[0033] In the initial state, the outer surface of the top block 34 does not exceed the outer surface of the inner positioning table 2, and a pressure sensor can be provided on the outer surface of the top block 34. The first bevel gear 31 is connected to a power source, which drives the rotation of the first bevel gear 31, and the meshing of the second bevel gear 32 rotates, and the rotation of the second bevel gear 32 pushes the threadedly connected screw rod 33 outward to press the inner wall of the drum brake 8. When a certain pressure is reached through the outer surface pressure sensor of the top block 34, the power source stops driving action, thereby playing the role of auxiliary inner positioning. When the power source rotates in the opposite direction, the outer surface of the top block 34 is away from the inner surface of the drum brake 8, so that the drum brake 8 can be easily taken down.

[0034] As Figure 3 shown, the outer positioning mechanism 4 comprises two opposite discs 41 located below the fixed seat 1, a plurality of first connecting rods 42 are connected between the two discs 41, one end of the inner side of each first connecting rod 42 is connected with the disc 41, the lower end of each second connecting rod 43 is hingedly connected to one end of the outer side of each first connecting rod 42, the upper end of each second connecting rod 43 is hingedly connected to the outer end of each third connecting rod 45, the inner end of each third connecting rod 45 is fixedly connected with an outer positioning claw 46, and a recess is formed in the inner surface of the lower segment of each outer positioning claw 46. The first connecting rod 42 is also slidably connected with an auxiliary outer positioning mechanism 44. The recess formed in the inner surface of the lower segment of the outer positioning claw 46 needs to ensure that when the third connecting rod 45 pulls the outer positioning claw 46 obliquely upward, the lower segment of the outer positioning claw 46 does not interfere with the drum brake 8.

[0035] In some preferred embodiments, as Figures 2 to 4 shown, the central part of the two discs 41 is provided with the output end of the air cylinder 5, the air cylinder 5 is fixedly arranged in the fixed sleeve 51, the central part of the first bevel gear 31 is provided with the output end of the motor 6, the motor 6 is fixedly installed in the fixed seat 1, and a plurality of fine positioning columns 7 are fixedly arranged below the fixed seat 1. The fine positioning column 7 is used to accurately position the device to the required installation workbench, and a fine positioning hole corresponding to the fine positioning column 7 is formed on the workbench.

[0036] In some preferred embodiments, as Figure 6As shown, each set of auxiliary external positioning 44 includes a floating claw 441. The fixed base 1 has a hole adapted to the floating claw 441, and the fixed base 1 and the floating claw 441 are slidably engaged. A ball joint 442 is fixedly connected below the floating claw 441. A connecting piece 443 is rotatably connected below the ball joint 442. A slider 444 is fixedly connected below the connecting piece 443. A sliding groove 424 is provided on the first connecting rod 42 below each slider 444. The sliding groove 424 and the slider 444 are slidably engaged. The slider 444 is located in the sliding groove 424. That is, when the sliding groove 424 swings with the first connecting rod 42, the slider 444 will slide in the sliding groove 424 and swing up and down accordingly. Through the connection of the connecting piece 443 and the ball joint 442, the floating claw 441 can move up and down vertically along the hole on the fixed base 1.

[0037] like Figure 5 As shown, each of the two discs 41 has a circular track 411 on its opposite sides. The inner end of the first connecting rod 42 is located inside the two circular tracks 411. The first connecting rod 42 has a recessed groove 423 that matches the circular track 411, and there is a gap between the circular track 411 and the recessed groove 423. This allows the outer end of the first connecting rod 42 to descend or ascend obliquely when the two circular tracks 411 drive the inner end of the first connecting rod 42 to rise or fall.

[0038] In some preferred embodiments, such as Figure 4 As shown, a convex frustum 321 is fixedly provided on the outer surface of each of the second bevel teeth 32, and a first fixing bracket 13 is sleeved on each of the convex frustum 321. The first fixing bracket 13 is fixedly installed on the fixing base 1. The first fixing bracket 13 fixes the second bevel teeth 32 through the convex frustum 321.

[0039] In some preferred embodiments, such as Figure 1 As shown, a plurality of bosses 11 are evenly arranged around the fixed base 1, and each boss 11 has a through hole 12. A threaded hole opposite to the through hole 12 is provided on the processing platform, and the device is fixed to the processing platform by bolt connection.

[0040] In some preferred embodiments, such as Figure 2 and Figure 3As shown, a first fixed shaft 421 is arranged on a section of the first connecting rod 42 close to the disc 41, a second fixed frame 14 is sleeved on the first fixed shaft 421, the upper section of the second fixed frame 14 is fixedly installed on the bottom surface of the fixed seat 1, and a avoiding space 422 that is matched with the second fixed frame 14 is arranged on the first connecting rod 42. The point where the first fixed shaft 421 is located is the fixed fulcrum of the first connecting rod 42, that is, when the inner end of the first connecting rod 42 rises or falls, the outer end of the first connecting rod 42 falls or rises with the fixed fulcrum as the boundary.

[0041] In some preferred embodiments, as shown in Figure 1 and Figure 3 each of the third connecting rods 45 is arranged with a second fixed shaft 451 on a section close to the outer positioning claw 46, the two ends of each of the second fixed shafts 451 are arranged on a third fixed frame 15, and the third fixed frame 15 is fixedly arranged on the fixed seat 1. The point where the second fixed shaft 451 is located is the fixed fulcrum of the third connecting rod 45, that is, when one end of the third connecting rod 45 rises or falls, the other end of the third connecting rod 45 falls or rises with the fixed fulcrum as the boundary.

[0042] In the above embodiments, the use method of the drum brake machining and assembling device is that the fixed seat 1 is fixed on a machining platform, the machining platform is arranged with a positioning hole matched with the precise positioning column 7, a threaded hole matched with the through hole 12 and an avoiding space of the outer positioning mechanism 4.

[0043] In the initial state, the output end of the air cylinder 5 is elongated, the disc 41 pulls the inner end of the first connecting rod 42 upwards, a section of the first connecting rod 42 outside the fixed fulcrum of the first fixed shaft 421 drives the second connecting rod 43 to float downwards, a section of the third connecting rod 45 inside the fixed fulcrum of the second fixed shaft 451 drives the outer positioning claw 46 to float upwards, the upper section of the outer positioning claw 46 inclines outward, the sliding block 444 slides in the sliding groove 424, the connection between the connecting piece 443 and the ball hinge 442 drives the floating clamping claw 441 to descend into the fixed seat 1, the outer positioning claw 46 does not interfere with the drum brake 8, the drum brake 8 is placed on the fixed seat 1, and the inner surface of the drum brake 8 is tightly attached to the outer surface of the inner positioning table 2.

[0044] Then, the output end of the air cylinder 5 is contracted, the working principle is the same as the above-mentioned principle of the elongation of the output end of the air cylinder 5, but the direction is opposite, the upper section of the outer positioning claw 46 clamps the outer wall of the drum brake 8, and the upper section of the floating clamping claw 441 extends outside the fixed seat 1 to assist in clamping the outer wall of the drum brake 8.

[0045] The motor 6 drives the first bevel gear 31 to rotate, the first bevel gear 31 is engaged with the second bevel gear 32 to rotate, the second bevel gear 32 drives the screw rod 33 to push outwards until the screw rod 33 tightly pushes the top block 34 outwards against the inner wall of the drum brake 8.

[0046] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0047] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit it. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A drum brake processing and assembly equipment, comprising a fixed base (1), characterized in that, An inner positioning platform (2) is fixedly installed on the fixed base (1). An auxiliary inner positioning mechanism (3) is provided on the fixed base (1) inside the inner positioning platform (2). A drum brake (8) is assembled on the outer side of the inner positioning platform (2). An outer positioning mechanism (4) is provided on the outer side of the drum brake (8). The auxiliary internal positioning mechanism (3) includes a first bevel tooth (31), a plurality of second bevel teeth (32) are meshed on the first bevel tooth (31), and a screw (33) is threadedly connected to the center of each second bevel tooth (32). A top block (34) is fixedly connected to the outer end of the screw (33), and the top block (34) is embedded in the internal positioning platform (2). The external positioning mechanism (4) includes two opposing discs (41) located below the fixed base (1). A plurality of first connecting rods (42) are connected between the two discs (41). One end of the inner side is connected to the disc (41). The lower end of a second connecting rod (43) is hinged to the outer end of the outer side of each first connecting rod (42). The upper end of a third connecting rod (43) is hinged to the outer end of the third connecting rod (45). An external positioning claw (46) is fixedly connected to the inner end of each third connecting rod (45). A groove is provided on the lower section of the inner surface of each external positioning claw (46). An auxiliary external positioning (44) is also slidably connected to the first connecting rod (42).

2. The drum brake processing and assembly equipment according to claim 1, characterized in that, The output end of a cylinder (5) is inserted through the center of the two discs (41). The cylinder (5) is fixedly installed in the fixed sleeve (51). The output end of a motor (6) is inserted through the center of the first bevel tooth (31). The motor (6) is fixedly installed in the fixed seat (1). Several precision positioning pins (7) are fixedly installed below the fixed seat (1).

3. The drum brake processing and assembly equipment according to claim 2, characterized in that, Each of the auxiliary external positioning (44) includes a floating claw (441), a ball joint (442) is fixedly connected below the floating claw (441), a connecting piece (443) is rotatably connected below the ball joint (442), a slider (444) is fixedly connected below the connecting piece (443), and a sliding groove (424) is provided on the first connecting rod (42) below each slider (444), and the sliding groove (424) and the slider (444) are in sliding engagement; Both of the two discs (41) are provided with circular tracks (411) on opposite sides. The inner end of the first connecting rod (42) is located on the inner side between the two circular tracks (411). The first connecting rod (42) is provided with a clearance groove (423) that is adapted to the circular track (411), and there is a gap between the circular track (411) and the clearance groove (423).

4. The drum brake processing and assembly equipment according to claim 3, characterized in that, Each of the second bevel teeth (32) has a convex truncated cone (321) fixedly provided on its outer surface. Each convex truncated cone (321) is fitted with a first fixing frame (13), which is fixedly installed on the fixing seat (1).

5. The drum brake processing and assembly equipment according to claim 4, characterized in that, The fixed base (1) is evenly provided with a number of protrusions (11), and each protrusion (11) has a through hole (12).

6. The drum brake processing and assembly equipment according to claim 5, characterized in that, A first fixed shaft (421) is provided on a section of the first connecting rod (42) near the disk (41). A second fixed frame (14) is sleeved on the first fixed shaft (421). The upper section of the second fixed frame (14) is fixedly installed on the bottom surface of the fixed base (1). An clearance space (422) adapted to the second fixed frame (14) is provided on the first connecting rod (42).

7. The drum brake processing and assembly equipment according to claim 6, characterized in that, Each of the third links (45) has a second fixed shaft (451) passing through a section near the outer positioning claw (46), and both ends of each second fixed shaft (451) are passing through a third fixed frame (15), which is fixedly mounted on the fixed seat (1).

8. The method of using the drum brake processing and assembly equipment according to any one of claims 1-7, characterized in that, The fixed base (1) is fixed on the processing platform, and the processing platform is provided with a positioning hole that matches the precision positioning pin (7), a threaded hole that is opposite to the through hole (12), and a clearance for the external positioning mechanism (4); In the initial state, the output end of the cylinder (5) is extended, the disc (41) pulls the inner end of the first connecting rod (42) upward, and the first fixed shaft (421) as the fulcrum, the outer part of the first connecting rod (42) drives the second connecting rod (43) to float downward, and the third connecting rod (45) as the fulcrum, the inner part of the third connecting rod (45) as the fulcrum drives the outer positioning claw (46) to float upward. The upper part of the outer positioning claw (46) tilts outward, and at the same time, the slider (444) slides in the sliding groove (424). The connection between the connecting piece (443) and the ball joint (442) drives the floating claw (441) to descend and retract into the fixed seat (1). The outer positioning claw (46) does not interfere with the drum brake (8). The drum brake (8) is placed on the fixed seat (1), and the inner surface of the drum brake (8) is in close contact with the outer surface of the inner positioning platform (2). Next, the output end of the cylinder (5) retracts, and the working principle is the same as that of the output end of the cylinder (5) extending, but in the opposite direction. The upper section of the outer positioning claw (46) clamps the outer wall of the drum brake (8), and at the same time, the upper section of the floating claw (441) extends out of the outside of the fixed seat (1) to assist in clamping the outer wall of the drum brake (8). The motor (6) starts and drives the first bevel gear (31) to rotate. The rotation of the first bevel gear (31) meshes with the rotation of the second bevel gear (32). The rotation of the second bevel gear (32) causes the threaded screw (33) to push outward until the screw (33) tightly presses the top block (34) against the inner wall of the drum brake (8).

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