Milling device for limiting arc groove of brake shoe of hub brake

Abstract

The invention belongs to the technical field of milling, and particularly relates to a hub brake shoe limiting arc groove milling device which comprises a milling table, a conveying mechanism is arranged on one side of the top of the milling table, a supporting seat is connected to the other side of the top of the milling table through bolts, and a gap is reserved between the bottom of the supporting seat and the top of the milling table. A fixing mechanism is arranged at the top of the supporting seat, an extruding mechanism is arranged on one side of the conveying mechanism, the extruding mechanism is matched with the fixing mechanism, an adjusting mechanism is arranged at the top of the milling table, a milling mechanism is arranged at the bottom of the adjusting mechanism, and the milling mechanism is located above the supporting seat. Through cooperation of the extrusion mechanism and the fixing mechanism, the stability of shoe block machining can be effectively improved, and the situation that in the milling process of a shoe block, due to the fact that the fixing effect is poor, the shoe block deviates towards one side, and consequently milling of a shoe block limiting arc groove deviates is prevented.

Description

Technical Field

[0001] The invention relates to the field of milling, and in particular to a device for milling a limited arc groove of a hub brake shoe. Background Art

[0002] The hub brake shoe is one of the most important safety parts of a motorcycle. It plays a key role in the braking process. The contact surface between it and the wheel hub and the size of its friction force directly affect the braking performance. In the limit arc processing technology of the hub brake shoe, one of the processes is to mill the limit at one end of the hub brake shoe. When processing the limit arc groove of the hub brake shoe, it is usually necessary to mill the limit arc groove of the hub brake shoe.

[0003] After searching, a Chinese patent application with application publication number CN113664266A discloses a hub brake brake shoe limit arc groove milling processing device, including: a base, a feeding limit seat, a fixed pressure block, a milling cutter wheel, and an elastic pressure plate, the elastic pressure plate includes a pressure plate body and a spring, the pressure plate body is located above the other side of the feeding limit seat, one end of the pressure plate body close to the starting end of the feeding limit seat is hinged to the base, and the upper part of the end of the pressure plate body close to the end of the feeding limit seat is connected to the base through a spring, and by designing a specific structure of the feeding limit seat, the fixed pressure block and the elastic pressure plate structure, through their specific positional relationship, the processing efficiency of the hub brake brake shoe limit arc groove can be improved through a continuous feeding method, and the hub brake brake shoe can be fully and stably positioned when the hub brake brake shoe is conveyed and milling the limit arc groove, thereby improving the processing accuracy of the hub brake brake shoe limit arc groove.

[0004] When the existing device is milling the limiting arc groove, it is usually necessary to fix the shoe block. However, when milling the arc groove of the shoe block, the milling cutter will process from one side of the shoe block to the other side during the milling process. Therefore, the milling cutter will generate force in the process of milling the shoe block, and the existing device has a poor effect of fixing the shoe block. Therefore, in the process of processing the device, the shoe block will often deflect to one side during the processing due to the poor stability of the shoe block, thereby causing deviation in the milling of the shoe block limiting arc groove. Summary of the invention

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A hub brake shoe limiting arc groove milling processing device comprises a milling table, a conveying mechanism is arranged on one side of the top of the milling table, a support seat is connected to the other side of the top of the milling table by bolts, and a gap is left between the bottom of the support seat and the top of the milling table, a fixing mechanism is arranged on the top of the support seat, an extrusion mechanism is arranged on one side of the conveying mechanism, and the extrusion mechanism and the fixing mechanism are matched, an adjusting mechanism is arranged on the top of the milling table, and a milling mechanism is arranged on the bottom of the adjusting mechanism, and the milling mechanism is located above the support seat.

[0006] Preferably, the conveying mechanism includes multiple support plates, two rotating rods, two rollers, a conveyor belt and a first motor, and the bottoms of the multiple support plates are connected to the top of the milling table by bolts, and a rotation connection is formed between two adjacent support plates and the two ends of the rotating rod through bearings, the roller is fixedly sleeved on the outer wall of the rotating rod, and a rotation connection is formed between the two rollers and the conveyor belt, one side of one of the support plates is connected to the first motor by bolts, and one end of the first motor is fixedly connected to one of the rotating rods, wherein a guide plate is connected between one side of the two support plates by bolts, the guide plate is inclined, and both sides of the top of the guide plate are connected to the limiting plate by bolts, and one end of the guide plate is located on one side of the top of the support seat.

[0007] Preferably, the fixing mechanism includes a pad, two clamping plates, a swing plate and a push rod, and a first spring is connected to a support seat on one side of the pad by bolts, and a second spring is connected to a support seat on one side of the two clamping plates by bolts. Through holes are penetrated on opposite sides of the support seat, and a push plate is slidably connected to the inner wall of the through hole. The two ends of the push plate are respectively connected to the pad and one side of the swing plate by hinges, and the two push plates are distributed in an eight-shaped shape. A connecting frame is connected to the support seat on both sides by bolts, and a rotational connection is formed between the connecting frame and the swing plate by a bearing. Pull-out holes are penetrated on opposite sides of the support seat, and a push rod is slidably connected to the inner wall of the pull-out hole, one end of the push rod contacts with the clamping plate, and the other end of the push rod contacts with one side of the swing plate.

[0008] Preferably, the extrusion mechanism comprises a connecting plate, a first hydraulic rod and an extrusion plate, and one side of the connecting plate is connected to the two support plates by bolts, and both ends of the first hydraulic rod are respectively connected to one side of the connecting plate and the extrusion plate by bolts.

[0009] Preferably, the adjustment mechanism consists of an adjustment frame, a second hydraulic rod and a fixed plate, and the bottom of the adjustment frame is connected to the top of the milling table by bolts, the top and bottom of the second hydraulic rod are respectively connected to the adjustment frame and the fixed plate by bolts, and guide openings are opened on opposite sides of the adjustment frame, and guide blocks are slidably connected to the inner walls of the two guide openings, and the guide blocks are fixedly connected to the fixed plate.

[0010] Preferably, the milling mechanism includes a second motor, a driving wheel, a driven wheel, a rotating shaft, a rotating disk, a third motor, a sleeve and a milling cutter, and a top of the rotating shaft and a bottom of a fixed plate are rotatably connected via a bearing, the bottom of the rotating shaft is fixedly connected to the top of the rotating disk, the driven wheel is fixedly sleeved on the outer wall of the rotating shaft, the top of the fixed plate and the second motor are connected via bolts, one end of the second motor is fixedly connected to the driving wheel, the driving wheel is meshed with the driven wheel, a top of the sleeve and one side of the bottom of the rotating disk are rotatably connected via a bearing, the milling cutter is inserted into the interior of the sleeve, threaded holes are penetrated on both sides of the outer wall of the sleeve, the inner walls of the two threaded holes are threadedly connected with fastening bolts, one side of the top of the rotating disk is connected to the third motor via bolts, and one end of the third motor is fixedly connected to the sleeve.

[0011] Preferably, a lifting mechanism is provided between the adjusting mechanism and the bottom of the supporting seat, and the lifting mechanism cooperates with the adjusting mechanism.

[0012] Preferably, the lifting mechanism includes a support block, a transmission assembly, a top shaft, a swing rod and a top plate, and a third spring is connected between the top of the support block and the guide port by bolts, the support block and the top shaft are connected by a transmission assembly, one side of the adjusting frame is connected to a positioning seat by bolts, a positioning hole is provided through the top of the positioning seat, the positioning hole is slidably connected to the top shaft, a notch is provided at the bottom position of one side of the adjusting frame, a rotational connection is formed between the notch and the swing rod by a bearing, one side of the top of the swing rod contacts with the bottom of the top shaft, a top block is fixed on the other side of the top of the swing rod, a connecting port is provided through one side of the top of the support seat, one side of the connecting port is connected to the top plate by a hinge, and the top of the top block contacts with the bottom of the top plate.

[0013] Preferably, the transmission assembly consists of a gear, a first rack and a second rack, and the bottom of the first rack is fixedly connected to the top of the support block, a slide groove is provided on one side of the adjusting frame, the slide groove is slidably connected to the first rack, both ends of one side of the adjusting frame are connected with fixed blocks by bolts, and the two fixed blocks and the gear are rotatably connected by bearings, the first rack and the second rack are respectively meshed with the two sides of the gear, and the bottom of the second rack is fixedly connected to the top of the top shaft.

[0014] The beneficial effects of the present invention are: The present invention uses an extrusion mechanism and a fixing mechanism to place the shoe on the conveying mechanism when milling the limiting arc groove of the shoe. The conveying mechanism is started, and the conveying mechanism drives the shoe to move. When the shoe moves to one side of the conveying mechanism, the shoe falls on the guide plate, and the shoe slides onto the support seat through the guide plate. At this time, the extrusion mechanism is started, and the extrusion mechanism pushes the shoe to move to one side, and the shoe contacts the pad when moving. At this time, the extrusion mechanism continues to drive the shoe to move to one side, and the shoe extrudes the pad when moving, and the pad moves to one side after being extruded. At this time, The push plate will be squeezed by the pad, and the push plate will move to one side when squeezed, and one end of the swing plate will deflect to one side under the action of the push plate. At this time, the other end of the swing plate will deflect in the opposite direction, and the end of the swing plate that is deflected in the opposite direction will drive the push rod to move. When the push rod moves, it will push the clamping plate to move to one side of the shoe block, so that the clamping plate squeezes and fixes both sides of the shoe block. The cooperation between the squeezing mechanism and the fixing mechanism can effectively improve the stability of the shoe block processing, and prevent the shoe block from deviating to one side due to poor fixing effect during the milling process, thereby causing deviation in the milling of the shoe block limit arc groove; The present invention provides an adjusting mechanism and a lifting mechanism. When milling is completed, the adjusting mechanism will drive the milling mechanism to move upward, and at the same time, the extruding mechanism will move away from the shoe. As the adjusting mechanism rises, the guide block will act on the supporting block, and the supporting block will move upward synchronously with the upward movement of the guide block. At this time, the second rack will drive the gear to rotate when moving upward, and the gear will drive the top shaft to move downward through engagement while rotating. When the top shaft moves downward, it will drive one end of the swing rod to move downward, and the other end of the swing rod will deflect downward. At this time, the top block will lift the top plate when moving upward, and one end of the top plate will deflect upward, and when the top plate deflects, it will drive the processed shoe to deflect to one side, thereby facilitating the lifting of the processed shoe, so as to facilitate the unloading of the shoe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the hub brake shoe limiting arc groove milling processing device proposed by the present invention; Figure 2 It is a partial structural schematic diagram of the hub brake shoe limiting arc groove milling processing device proposed by the present invention; Figure 3 It is a schematic structural diagram of the extrusion mechanism and the fixing mechanism of the hub brake shoe limit arc groove milling processing device proposed by the present invention; Figure 4 It is a schematic diagram of the structure of the adjustment mechanism and the milling mechanism of the hub brake shoe limit arc groove milling processing device proposed by the present invention; Figure 5This is a schematic diagram of the milling mechanism structure of the hub brake shoe limit arc groove milling processing device proposed by the present invention; Figure 6 It is a schematic diagram of the structure of the jacking mechanism of the hub brake shoe limit arc groove milling processing device proposed by the present invention; Figure 7 This is a schematic diagram of the transmission component structure of the hub brake shoe limiting arc groove milling processing device proposed by the present invention.

[0016] In the attached drawings: 1, milling table; 2, conveying mechanism; 3, adjusting mechanism; 4, milling mechanism; 5, supporting seat; 6, supporting plate; 7, rotating rod; 8, rotating roller; 9, first motor; 10, conveyor belt; 11, guide plate; 12, limit plate; 13, fixing mechanism; 14, extrusion mechanism; 15, connecting plate; 16, first hydraulic rod; 17, extrusion plate; 18, pad; 19, first spring; 20, through port; 21, push plate; 22, connecting frame; 23, swing plate; 24, clamping plate; 25, second spring; 26, push rod; 27, adjusting frame; 28, first Two hydraulic rods; 29, fixed plate; 30, guide port; 31, slide slot; 32, lifting mechanism; 33, notch; 34, second motor; 35, driving wheel; 36, driven wheel; 37, rotating shaft; 38, turntable; 39, third motor; 40, sleeve; 41, milling cutter; 42, fastening bolt; 43, guide block; 44, supporting block; 45, transmission assembly; 46, top shaft; 47, positioning seat; 48, swing rod; 49, top block; 50, connecting port; 51, top plate; 52, fixed block; 53, gear; 54, first rack; 55, second rack. DETAILED DESCRIPTION

[0017] Example 1, reference Figure 1-Figure 5 A hub brake shoe limiting arc groove milling processing device comprises a milling table 1, a conveying mechanism 2 is arranged on one side of the top of the milling table 1, a support seat 5 is connected to the other side of the top of the milling table 1 by bolts, and a gap is left between the bottom of the support seat 5 and the top of the milling table 1, a fixing mechanism 13 is arranged on the top of the support seat 5, an extrusion mechanism 14 is arranged on one side of the conveying mechanism 2, and the extrusion mechanism 14 and the fixing mechanism 13 are matched, an adjusting mechanism 3 is arranged on the top of the milling table 1, and a milling mechanism 4 is arranged on the bottom of the adjusting mechanism 3, and the milling mechanism 4 is located above the support seat 5. The cooperation between the extrusion mechanism 14 and the fixing mechanism 13 can effectively improve the stability of shoe processing, and prevent the shoe from deviating to one side due to poor fixing effect during the milling process, thereby causing deviation in the milling of the shoe limiting arc groove.

[0018] On the basis of the above, the conveying mechanism 2 includes multiple support plates 6, two rotating rods 7, two rollers 8, a conveyor belt 10 and a first motor 9, and the bottoms of the multiple support plates 6 are connected to the top of the milling table 1 by bolts, and a rotational connection is formed between two adjacent support plates 6 and the two ends of the rotating rod 7 through bearings. The roller 8 is fixedly sleeved on the outer wall of the rotating rod 7, and a rotational connection is formed between the two rollers 8 and the conveyor belt 10. One side of one of the support plates 6 is connected to the first motor 9 by bolts, and one end of the first motor 9 is fixedly connected to one of the rotating rods 7, and a guide plate 11 is connected between one side of the two support plates 6 by bolts. The guide plate 11 is inclined, and both sides of the top of the guide plate 11 are connected to the limiting plate 12 by bolts, and one end of the guide plate 11 is located on one side of the top of the support seat 5.

[0019] On the basis of the above, the fixing mechanism 13 includes a pad 18, two clamping plates 24, a swinging plate 23 and a push rod 26, and a first spring 19 is bolted to one side of the pad 18 and the support seat 5, and a second spring 25 is bolted to one side of the two clamping plates 24 and the support seat 5, and through openings 20 are penetrated on the opposite sides of the support seat 5, and a push plate 21 is slidably connected to the inner wall of the through opening 20, and the two ends of the push plate 21 are respectively connected to the pad 18 and one side of the swinging plate 23 by hinges, and the two push plates 21 are distributed in an eight-shaped shape, and a connecting frame 22 is bolted to the two sides of the support seat 5, and a rotational connection is formed between the connecting frame 22 and the swinging plate 23 through a bearing, and a pull-out hole is penetrated on the opposite sides of the support seat 5, and a push rod 26 is slidably connected to the inner wall of the pull-out hole, one end of the push rod 26 contacts the clamping plate 24, and the other end of the push rod 26 contacts one side of the swinging plate 23.

[0020] On the basis of the above, the extrusion mechanism 14 includes a connecting plate 15, a first hydraulic rod 16 and an extrusion plate 17, and one side of the connecting plate 15 is connected to the two support plates 6 by bolts, and the two ends of the first hydraulic rod 16 are respectively connected to one side of the connecting plate 15 and the extrusion plate 17 by bolts.

[0021] On the basis of the above, the adjustment mechanism 3 is composed of an adjustment frame 27, a second hydraulic rod 28 and a fixed plate 29, and the bottom of the adjustment frame 27 is connected to the top of the milling table 1 by bolts, and the top and bottom of the second hydraulic rod 28 are respectively connected to the adjustment frame 27 and the fixed plate 29 by bolts, and guide openings 30 are penetrated on the opposite sides of the adjustment frame 27, and the inner walls of the two guide openings 30 are slidably connected with guide blocks 43, and the guide blocks 43 are fixedly connected to the fixed plate 29.

[0022] On the basis of the above, the milling mechanism 4 includes a second motor 34, a driving wheel 35, a driven wheel 36, a rotating shaft 37, a rotating disk 38, a third motor 39, a sleeve 40 and a milling cutter 41, and the top of the rotating shaft 37 is rotatably connected to the bottom of the fixed plate 29 through a bearing, the bottom of the rotating shaft 37 is fixedly connected to the top of the rotating disk 38, the driven wheel 36 is fixedly sleeved on the outer wall of the rotating shaft 37, the top of the fixed plate 29 is connected to the second motor 34 through bolts, one end of the second motor 34 is fixedly connected to the driving wheel 35, the driving wheel 35 is meshed with the driven wheel 36, the top of the sleeve 40 is rotatably connected to one side of the bottom of the rotating disk 38 through a bearing, the milling cutter 41 is inserted into the interior of the sleeve 40, both sides of the outer wall of the sleeve 40 are penetrated with threaded holes, the inner walls of the two threaded holes are threadedly connected with fastening bolts 42, one side of the top of the rotating disk 38 is connected to the third motor 39 through bolts, and one end of the third motor 39 is fixedly connected to the sleeve 40.

[0023] Example 2, reference Figure 1-Figure 7 , a hub brake shoe limiting arc groove milling processing device, compared with Example 1, on the basis of Example 1, a lifting mechanism 32 is arranged between the adjusting mechanism 3 and the bottom of the supporting seat 5, and the lifting mechanism 32 and the adjusting mechanism 3 are matched.

[0024] On the basis of the above, the lifting mechanism 32 includes a support block 44, a transmission assembly 45, a top shaft 46, a swing rod 48 and a top plate 51, and a third spring is bolted between the top of the support block 44 and the guide port 30, the support block 44 and the top shaft 46 are connected by the transmission assembly 45, one side of the adjustment frame 27 is bolted with a positioning seat 47, a positioning hole is provided at the top of the positioning seat 47, and the positioning hole is slidably connected to the top shaft 46, a slot 33 is provided at the bottom of one side of the adjustment frame 27, a rotational connection is formed between the slot 33 and the swing rod 48 through a bearing, one side of the top of the swing rod 48 contacts the bottom of the top shaft 46, and a top block 49 is fixed on the other side of the top of the swing rod 48, a connecting port 50 is provided at one side of the top of the support seat 5, one side of the connecting port 50 is hinged to the top plate 51, and the top of the top block 49 contacts the bottom of the top plate 51.

[0025] On the basis of the above, the transmission assembly 45 is composed of a gear 53, a first rack 54 and a second rack 55, and the bottom of the first rack 54 is fixedly connected to the top of the support block 44, a slide groove 31 is provided on one side of the adjustment frame 27, and the slide groove 31 is slidably connected to the first rack 54, and the two ends of one side of the adjustment frame 27 are connected with fixed blocks 52 by bolts, and the two fixed blocks 52 are rotatably connected to the gear 53 by bearings, and the first rack 54 and the second rack 55 are respectively meshed with the two sides of the gear 53, and the bottom of the second rack 55 is fixedly connected to the top of the top shaft 46.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hub brake shoe limit arc groove milling device, comprising a milling table (1), characterized in that: A conveying mechanism (2) is provided on one side of the top of the milling table (1); a support seat (5) is connected to the other side of the top of the milling table (1) by bolts, and a gap is left between the bottom of the support seat (5) and the top of the milling table (1); a fixing mechanism (13) is provided on the top of the support seat (5); an extrusion mechanism (14) is provided on one side of the conveying mechanism (2), and the extrusion mechanism (14) and the fixing mechanism (13) are matched; an adjustment mechanism (3) is provided on the top of the milling table (1), and a milling mechanism (4) is provided at the bottom of the adjustment mechanism (3); and the milling mechanism (4) is located above the support seat (5).

2. The hub brake shoe limiting arc groove milling device according to claim 1, characterized in that: The conveying mechanism (2) comprises a plurality of support plates (6), two rotating rods (7), two rotating rollers (8), a conveyor belt (10) and a first motor (9), wherein the bottoms of the plurality of support plates (6) are connected to the top of the milling table (1) by bolts, two adjacent support plates (6) are rotatably connected to the two ends of the rotating rod (7) by bearings, the rotating roller (8) is fixedly sleeved on the outer wall of the rotating rod (7), and the two rotating rollers (8) are rotatably connected to the conveyor belt (10), one side of one of the support plates (6) is connected to the first motor (9) by bolts, one end of the first motor (9) is fixedly connected to one of the rotating rods (7), one side of the two support plates (6) is connected to a guide plate (11) by bolts, the guide plate (11) is inclined, both sides of the top of the guide plate (11) are connected to a limit plate (12) by bolts, and one end of the guide plate (11) is located on one side of the top of the support seat (5).

3. The hub brake shoe limiting arc groove milling device according to claim 1, characterized in that: The fixing mechanism (13) comprises a pad (18), two clamping plates (24), a swinging plate (23) and a push rod (26), wherein a first spring (19) is connected between one side of the pad (18) and the support seat (5) by bolts, a second spring (25) is connected between one side of the two clamping plates (24) and the support seat (5) by bolts, through openings (20) are provided on opposite sides of the support seat (5), a push plate (21) is slidably connected to the inner wall of the through opening (20), and two ends of the push plate (21) are respectively connected to the pad ( 18) and one side of the swing plate (23) are connected by a hinge, the two push plates (21) are arranged in an eight-shaped pattern, both sides of the support seat (5) are connected to a connecting frame (22) by bolts, the connecting frame (22) and the swing plate (23) are rotatably connected by a bearing, and the support seat (5) is provided with a pull-out hole on both opposite sides, and a push rod (26) is slidably connected to the inner wall of the pull-out hole, one end of the push rod (26) is in contact with the clamping plate (24), and the other end of the push rod (26) is in contact with one side of the swing plate (23).

4. The hub brake shoe limiting arc groove milling device according to claim 1, characterized in that: The extrusion mechanism (14) comprises a connecting plate (15), a first hydraulic rod (16) and an extrusion plate (17), wherein one side of the connecting plate (15) is connected to the two support plates (6) via bolts, and two ends of the first hydraulic rod (16) are respectively connected to one side of the connecting plate (15) and the extrusion plate (17) via bolts.

5. The hub brake shoe limiting arc groove milling device according to claim 1, characterized in that: The adjusting mechanism (3) is composed of an adjusting frame (27), a second hydraulic rod (28) and a fixed plate (29), wherein the bottom of the adjusting frame (27) is connected to the top of the milling table (1) by bolts, the top and bottom of the second hydraulic rod (28) are respectively connected to the adjusting frame (27) and the fixed plate (29) by bolts, and guide openings (30) are penetrated on opposite sides of the adjusting frame (27), and guide blocks (43) are slidably connected to the inner walls of the two guide openings (30), and the guide blocks (43) are fixedly connected to the fixed plate (29).

6. The hub brake shoe limiting arc groove milling device according to claim 1, characterized in that: The milling mechanism (4) comprises a second motor (34), a driving wheel (35), a driven wheel (36), a rotating shaft (37), a rotating disk (38), a third motor (39), a sleeve (40) and a milling cutter (41), wherein the top of the rotating shaft (37) and the bottom of the fixed plate (29) are rotatably connected via a bearing, the bottom of the rotating shaft (37) is fixedly connected to the top of the rotating disk (38), the driven wheel (36) is fixedly sleeved on the outer wall of the rotating shaft (37), the top of the fixed plate (29) and the second motor (34) are connected via bolts, and the second motor ( One end of the sleeve (40) is fixedly connected to the driving wheel (35), the driving wheel (35) is meshed with the driven wheel (36), the top of the sleeve (40) and one side of the bottom of the rotating disk (38) are rotatably connected via a bearing, the milling cutter (41) is inserted into the sleeve (40), both sides of the outer wall of the sleeve (40) are penetrated with threaded holes, the inner walls of the two threaded holes are threadedly connected with fastening bolts (42), one side of the top of the rotating disk (38) is connected to the third motor (39) via bolts, and one end of the third motor (39) is fixedly connected to the sleeve (40).

7. The hub brake shoe limiting arc groove milling device according to claim 5, characterized in that: A lifting mechanism (32) is provided between the adjusting mechanism (3) and the bottom of the supporting seat (5), and the lifting mechanism (32) and the adjusting mechanism (3) are matched with each other.

8. The hub brake shoe limiting arc groove milling device according to claim 7, characterized in that: The lifting mechanism (32) comprises a support block (44), a transmission assembly (45), a top shaft (46), a swing rod (48) and a top plate (51), wherein a third spring is connected between the top of the support block (44) and the guide opening (30) by bolts, the support block (44) and the top shaft (46) are connected by the transmission assembly (45), a positioning seat (47) is connected to one side of the adjustment frame (27) by bolts, a positioning hole is formed through the top of the positioning seat (47), the positioning hole is slidably connected to the top shaft (46), and the adjustment frame (27) is provided with a plurality of springs. A notch (33) is provided at the bottom of one side of the section frame (27), and a rotation connection is formed between the notch (33) and the swing rod (48) via a bearing. One side of the top of the swing rod (48) contacts the bottom of the top shaft (46), and a top block (49) is fixed to the other side of the top of the swing rod (48). A connection opening (50) is provided through one side of the top of the support seat (5), and one side of the connection opening (50) is connected to the top plate (51) via a hinge, and the top of the top block (49) contacts the bottom of the top plate (51).

9. The hub brake shoe limiting arc groove milling device according to claim 8, characterized in that: The transmission assembly (45) is composed of a gear (53), a first rack (54) and a second rack (55), and the bottom of the first rack (54) is fixedly connected to the top of the support block (44), a slide groove (31) is provided on one side of the adjustment frame (27), and the slide groove (31) is slidably connected to the first rack (54), and two ends of one side of the adjustment frame (27) are connected to fixed blocks (52) by bolts, and the two fixed blocks (52) and the gear (53) are rotatably connected by bearings, and the first rack (54) and the second rack (55) are respectively meshed with the two sides of the gear (53), and the bottom of the second rack (55) is fixedly connected to the top of the top shaft (46).

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