Brake box machining tool

Abstract

The utility model relates to a brake box machining tool which comprises a base, a first supporting block, a second supporting block, a first pressing structure, a second pressing structure and a centering mechanism, a limiting piece is arranged on the first supporting block, and the limiting piece abuts against the lower left side of a brake box in the horizontal direction; the second supporting block is used for supporting the lower right side of the brake box. The first pressing structure and the second pressing structure are arranged on the upper left side and the lower right side of the brake box in a pressing mode correspondingly. The centering mechanism comprises a horizontal driving mechanism and a centering assembly, the horizontal driving mechanism is used for driving the centering assembly to move in the left-right direction, the centering assembly comprises two centering pins, and the two centering pins extend in the front-back direction and are used for being matched with the inner sides of two suspension arms of the brake box respectively. The supporting block is used for supporting the brake box, centering positioning and pressing are conducted through centering and pressing, automatic centering and pressing mechanisms such as a hydraulic mechanism are adopted, the centering and pressing effects are better, and the brake box is not prone to failure in the machining process.

Description

Technical Field

[0001] This utility model relates to the field of machining, specifically to a tooling for machining brake boxes. Background Technology

[0002] The tread brake unit is one of the main types of basic braking units for urban rail vehicles. The cylinder block, also known as the brake box, provides the overall framework, support foundation, and assembly reference for the entire unit, and is also the part with the most machining parts and the most complex manufacturing process. The mass of the cylinder block directly determines the braking effect of the tread brake unit, thus affecting the overall braking performance of the vehicle.

[0003] like Figure 1 The diagram shows a side-mounted brake housing structure with two outward-extending booms. The boom ends require machined shaft holes. The brake housing body also has two mutually perpendicular reference axes: one running horizontally through the brake housing, with the two booms symmetrical about this axis; and the other in the front-rear direction. The front of the brake housing has a mounting hole for side mounting, which needs to be machined. The brake housing has an irregular shape, numerous machining areas, and specific requirements. In actual machining, manual centering is used, with conventional clamping devices such as pressure plates and bolts for positioning the brake housing. However, this method is prone to failure during machining. Utility Model Content

[0004] The purpose of this utility model is to provide a tooling for machining brake boxes, which can be used to clamp and position the brake box during machining.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A brake box machining fixture includes a base, on which a first support block, a second support block, a first clamping structure, a second clamping structure, and a centering mechanism are mounted.

[0007] The first support block is equipped with a limiting member, which abuts against the lower left side of the brake box in a horizontal direction;

[0008] The second support block is used to support the lower right side of the brake box;

[0009] Both the first and second clamping structures are automatic clamping structures, which are respectively clamped on the upper left and lower right sides of the brake box;

[0010] The centering mechanism includes a horizontal drive mechanism and a centering assembly. The horizontal drive mechanism is used to drive the centering assembly to move in the left and right directions. The centering assembly includes two centering pins that extend in the front and back directions and are used to cooperate with the inner sides of the two booms of the brake box, respectively.

[0011] Furthermore, the top of the first support block is provided with a screw hole for the threaded connection of the limiting member, and one end of the limiting member abuts against an arc groove in the brake box.

[0012] Furthermore, the second support block is arranged along the front-to-back direction in the length direction, and the second support block has two support positions at the front and back, which together with the support positions of the first support block form a three-point support.

[0013] Furthermore, the upper side of the second support block is a U-shaped groove with bolt holes for bolt connection to fix it to the base.

[0014] Furthermore, the first clamping mechanism employs a lever-type hydraulic cylinder.

[0015] Furthermore, the second clamping mechanism employs a rotary hydraulic cylinder.

[0016] Furthermore, the horizontal drive mechanism employs a side-mounted hydraulic cylinder.

[0017] Furthermore, the centering assembly includes a cylindrical body, with a mounting cavity on the front and rear sides of the cylindrical body, and the centering pin is installed in the mounting cavity. The outer end of the centering pin extends out of the cylindrical body, and a return spring is provided between the inner end of the centering pin and the mounting cavity.

[0018] Furthermore, the upper side of the mounting cavity is provided with a through hole, and the upper side of the centering pin is provided with a limiting hole corresponding to the limiting hole. The limiting hole is an elongated hole, and a limiting pin is installed in the through hole, with the lower part of the limiting pin extending into the limiting hole.

[0019] The beneficial effects of this utility model are:

[0020] In use, the brake box to be processed is placed on the first and second support blocks, with the side of the brake box with the lifting arm located on the lower side, supported by the first and second support blocks. When placing the brake box, the two lifting arms should be positioned symmetrically with reference to the centering assembly. Then, the centering mechanism actuates, moving the centering assembly towards the center of the two lifting arms, abutting against the inner side of the lifting arms, thus aligning the brake box. Then, an automatic clamping structure is used to clamp the brake box. At this point, the support, positioning, and clamping of the brake box are complete, and corresponding machining can be performed. Centering and clamping are both achieved using automatic mechanisms, such as hydraulic mechanisms, resulting in better centering and clamping effects, improved efficiency, and reduced likelihood of failure during processing. Attached Figure Description

[0021] Figure 1 It is a 3D view of the brake box;

[0022] Figure 2 This is a three-dimensional view of the brake box from another angle;

[0023] Figure 3This is the front view of the tooling used for machining the brake box;

[0024] Figure 4 This is a top view of the tooling used for machining the brake box;

[0025] Figure 5 yes Figure 3 A partial sectional view of the center assembly;

[0026] Figure 6 This is a partial sectional view of the first support block;

[0027] Figure 7 This is a partial sectional view of the second support block;

[0028] Figure 8 This is the front view of the brake box machining fixture after the brake box has been placed.

[0029] Figure 9 This is a top view of the brake box machining fixture after the brake box has been placed.

[0030] 1. Brake box; 11. Boom; 12. Mounting hole; 13. Arc groove; 2. Base; 21. Bracket; 3. Lever-type hydraulic cylinder; 31. Pressure arm; 41. First support block; 411. Screw hole; 42. Second support block; 5. Corner hydraulic cylinder; 6. Centering hydraulic cylinder; 7. Centering assembly; 71. Cylinder; 72. Centering pin; 721. Limiting hole; 73. Return spring; 74. Limiting pin; A. Pressing position. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art are within the protection scope of the present utility model.

[0032] Embodiments of this utility model:

[0033] like Figures 1-9 As shown, a brake box processing fixture includes a base 2, on which a first support block 41, a second support block 42, a first clamping structure, a second clamping structure, and a centering mechanism are provided. The first support block 41 and the second support block 42 support the brake box 1, the centering mechanism is used to align the position of the brake box 1, and then the first clamping structure and the second clamping structure are used to clamp the brake box 1.

[0034] like Figures 3-4 As shown, the first support block 41 includes a first support block 41, and a limiting member is provided on the first support block 41. Figure 6As shown, the first support block 41 has a T-shaped structure with a screw hole 411 at its top for threaded connection of the limiting member. The limiting member abuts against the lower left side of the brake box 1 in a horizontal direction. The bottom of the first support block is bolted to the base 2, so that the center line of the screw hole 411 is in the left-right direction.

[0035] The limiting component can be either a bolt or a pin, one end of which abuts against an arcuate groove 13 in the brake housing 1, such as... Figure 2 As shown, the brake housing 1 has an arc groove 13 on its lower left side.

[0036] Figure 4 and 7 As shown, the second support block 42 is positioned along the longitudinal direction to support the lower right side of the brake housing 1. The upper side of the second support block 42 has a U-shaped groove with bolt holes for bolt connection to fix it to the base 2. The bolts are hexagonal bolts, and the bolt heads do not protrude above the highest point of the second support block 42, i.e., they do not protrude from the support surface of the second support block 42. The brake housing 1 is supported by the front and rear ends of the second support block 42. The second support block 42 has two support positions, front and rear, which, together with the support position of the first support block 41, form a three-point support.

[0037] Both the first and second clamping structures are automatic clamping structures, respectively clamped on the upper left and lower right sides of the brake box 1. The first clamping mechanism uses a lever-type hydraulic cylinder 3, which is a purchased component, and its clamping arm 31 can be used to apply downward clamping force to the brake box 1.

[0038] The second clamping mechanism uses a rotary hydraulic cylinder 5, which is also a purchased component. It can rotate 90 degrees. Before clamping, it makes way for the placement of the brake box 1. After the brake box 1 is placed, the clamping arm of the rotary hydraulic cylinder 5 rotates 90 degrees and then descends to apply downward pressure to the clamping position of the brake box 1. For ease of understanding, Figure 1 The pressing position A is marked in the middle.

[0039] Figure 4 and 5 As shown, the centering mechanism includes a horizontal drive mechanism and a centering assembly 7. The horizontal drive mechanism drives the centering assembly 7 to move in the left and right directions. The horizontal drive mechanism uses a side-mounted hydraulic cylinder, which is designated as the centering hydraulic cylinder 6 to distinguish it from other hydraulic cylinders. The cylinder body of the centering hydraulic cylinder 6 is fixed on a bracket 21, which is located on a base 2. The hydraulic cylinder is located on the left side of the bracket 21. The centering assembly 7 is fixed to one end of the telescopic rod of the centering hydraulic cylinder 6.

[0040] The centering assembly 7 includes a cylindrical body 71, with a mounting cavity on each of its front and rear sides. These two mounting cavities are independently configured, and each cavity contains a centering pin 72. The two centering pins 72 extend in the front-rear direction and are respectively used to engage with the inner sides of the two booms 11 of the brake housing 1, such as... Figure 9 As shown.

[0041] The outer end of the centering pin 72 extends out of the cylinder 71, and a return spring 73 is provided between the inner end of the centering pin 72 and the mounting cavity, so that the centering pin 72 can move within a certain range when subjected to force.

[0042] Figure 5 As shown, the upper side of the mounting cavity has a through hole, and the upper side of the centering pin 72 has a limiting hole 721 corresponding to the limiting hole 721. The limiting hole 721 is an elongated hole, and a limiting pin 74 is installed in the through hole, with the lower part of the limiting pin 74 extending into the limiting hole 721. The limiting pin 74 can be a hexagonal pin. Because the limiting pin 74 is inserted into the limiting hole 721, the movement of the centering pin 72 is restricted to within the allowable range, thus preventing the centering pin 72 from coming out.

[0043] In use, the brake box is placed on the first support block 41 and the second support block 42, with the side of the brake box 1 with the boom 11 located on the lower side and suspended. Using the three-point support of the first support block 41 and the second support block 42, when placing the brake box 1, the two booms of the brake box are pre-aligned with the position of the centering pin 72 as a reference. Then, the centering hydraulic cylinder 6 is activated, driving the centering assembly 7 to move to the left, contacting the inside of the boom 11 of the brake box 1, thus aligning the brake box 1. Then, the lever-type hydraulic cylinder 3 and the corner hydraulic cylinder 5 both begin to operate, pressing the brake box 1 firmly. At this point, the support, positioning, and pressing of the brake box are complete, and corresponding machining can be performed.

[0044] Unless otherwise specified, the term "connection" in this utility model includes both direct and indirect connections. In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0045] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

Claims

1. A tooling fixture for machining a brake box, characterized in that: The system includes a base, on which are provided a first support block, a second support block, a first pressing structure, a second pressing structure, and a centering mechanism. The first support block is provided with a limiting member, which abuts against the lower left side of the brake box in a horizontal direction; The second support block is used to support the lower right side of the brake box; Both the first and second clamping structures are automatic clamping structures, which are respectively clamped on the upper left and lower right sides of the brake box; The centering mechanism includes a horizontal drive mechanism and a centering assembly. The horizontal drive mechanism is used to drive the centering assembly to move in the left and right directions. The centering assembly includes two centering pins that extend in the front and back directions and are used to cooperate with the inner sides of the two booms of the brake box, respectively.

2. The brake box machining fixture according to claim 1, characterized in that: The top of the first support block is provided with a screw hole for the threaded connection of the limiting member, and one end of the limiting member abuts against an arc groove in the brake box.

3. The brake box machining fixture according to claim 1, characterized in that: The second support block is set along the front-to-back direction in the length direction. The second support block has two support positions, front and back, which together with the support positions of the first support block form a three-point support.

4. The brake box machining fixture according to claim 3, characterized in that: The upper side of the second support block is a U-shaped groove with bolt holes for bolt connection to fix it to the base.

5. The brake box machining fixture according to claim 1, characterized in that: The first clamping structure uses a lever-type hydraulic cylinder.

6. The brake box machining fixture according to claim 1, characterized in that: The second clamping structure uses a rotary hydraulic cylinder.

7. The brake box machining fixture according to claim 1, characterized in that: The horizontal drive mechanism uses a side-mounted hydraulic cylinder.

8. The brake box machining fixture according to claim 1, characterized in that: The centering assembly includes a cylindrical body, with a mounting cavity on the front and rear sides of the cylindrical body. The centering pin is installed in the mounting cavity, with the outer end of the centering pin extending out of the cylindrical body and a return spring provided between the inner end of the centering pin and the mounting cavity.

9. The brake box machining fixture according to claim 8, characterized in that: The upper side of the mounting cavity is provided with a through hole, and the upper side of the centering pin is provided with a limiting hole corresponding to the limiting hole. The limiting hole is an elongated hole, and a limiting pin is installed in the through hole, with the lower part of the limiting pin extending into the limiting hole.

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