Brake shoe welding positioning device

Abstract

The brake shoe welding positioning device comprises a base, a rotating seat rotationally mounted on the base through a rotating shaft, a supporting seat fixedly connected to the rotating seat and a pressing assembly located above the supporting seat. The supporting seat comprises supporting faces located on the two sides of the supporting seat and used for supporting the two webs of the brake shoe respectively, supporting pins and positioning ball heads. The two ends of the supporting pin protrude out of the two supporting faces respectively to be used for supporting one ends of two webs on the brake shoe, and the positioning ball head is used for being embedded into a matching piece from the lower portion of the matching piece located at the other ends of the two webs of the brake shoe so as to support and position the matching piece. The supporting pin and the positioning ball head are arranged in the extending direction of the rotating shaft; the pressing assembly is used for pressing the outer surface of the brake shoe wing plate downwards above the brake shoe wing plate. According to the utility model, the fit clearance at the joint of the fitting piece and the web can be eliminated, and the welding precision of the web and the fitting piece can be improved during welding.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle brake drum system manufacturing, in particular to a brake shoe welding positioning device. Background Art

[0002] The brake shoe is an important component of the drum brake of commercial vehicles. The brake shoe is generally composed of a wing plate, two webs fixed on the inner side of the wing plate, and a mating part welded to one end of the two webs for matching with the camshaft of the brake. Usually, the mating part is processed by a casting process and then welded to the ends of the two webs. During welding, a positioning device is required to position the assembly formed by the web and the wing plate and the mating part. The existing positioning device has low positioning accuracy, especially the low positioning accuracy for the mating part, resulting in poor welding accuracy between the web and the mating part. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a brake shoe welding positioning device, which can improve the welding accuracy between the web and the mating part.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A brake shoe welding positioning device, characterized in that it comprises a base, a rotating base rotatably mounted on the base via a rotating shaft, a supporting base fixedly connected to the rotating base, and a pressing assembly located above the supporting base;

[0006] The support seat includes support surfaces on both sides thereof for supporting the two webs of the brake shoe, a support pin, and a positioning ball head. The two ends of the support pin protrude from the two support surfaces to support one end of the two webs on the brake shoe. The positioning ball head is used to be embedded in the mating piece located under the other end of the two webs of the brake shoe to support and position the mating piece. The support pin and the positioning ball head are arranged in the extension direction of the rotating shaft.

[0007] The pressing assembly is used for pressing the outer surface of the brake shoe wing plate downward above the brake shoe wing plate.

[0008] A connecting rod extending downward is provided on the positioning ball head. The connecting rod is passed through the support seat and is fixedly connected to the support seat through a connecting bolt.

[0009] The support seat is provided with a downwardly concave recess, in which the positioning ball head is located. A connecting hole for the connecting rod to pass through is provided on the bottom surface of the recess, and a support wall extending vertically to support the brake shoe mating part is provided on the side of the recess away from the support pin.

[0010] The pressing assembly comprises an adjusting bolt which is screwed on the rotating seat and extends in the height direction, and a pressing block which is fixed on the adjusting bolt and located above the supporting seat.

[0011] Two connecting rods extending upward and located on both sides of the support seat are fixed on the rotating seat. A crossbeam located above the support seat is fixed between the tops of the two connecting rods, and an adjusting bolt is screwed on the middle of the crossbeam.

[0012] A counterweight block is provided at the bottom of the rotating seat, and the counterweight block is located below the rotating shaft.

[0013] Two swivel seats are provided on the base, and the two ends of the rotating shaft are pivotally connected to the two swivel seats respectively. One end of the rotating shaft is fixedly connected to a dividing plate, and a plurality of positioning holes arranged along the circumference of the dividing plate are provided on the outer peripheral surface of the dividing plate. A set of fixed sleeves arranged on the periphery of the dividing plate is fixedly connected to one of the swivel seats, and a positioning pin that can move along the radial direction of the fixing sleeve is passed through the fixing sleeve. The inner end of the positioning pin is used to pass through one of the positioning holes to limit the freedom of rotation of the dividing plate relative to the fixing sleeve.

[0014] The beneficial effects of the present invention are:

[0015] In the utility model, the part that supports and positions the mating part is set as a positioning ball head, so that when the clamping assembly presses down the wing plate, one end of the web is supported by the support pin and the other end of the web can press the mating part downward as much as possible. In the process of the mating part being pressed, it can rotate freely relative to the positioning ball head, and the mating part can better contact with the web when rotating, thereby eliminating the fitting gap at the connection between the mating part and the web, which is beneficial to improve the welding accuracy of the web and the mating part during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the use state of the utility model;

[0018] Figure 3 for Figure 2 AA section view;

[0019] Figure 4 for Figure 3 Magnified view at point B in the middle;

[0020] Figure 5 for Figure 3 Schematic diagram of the connection between the rotating shaft and the base. DETAILED DESCRIPTION

[0021] Below, in conjunction with the accompanying drawings and specific embodiments, the utility model is further described:

[0022] like Figure 1 、 2, 3, 4, and 5 show a brake shoe welding positioning device of the present invention, which includes a base 10, a rotating base 20, a support base 30, and a clamping assembly 40, wherein the base 10 is the installation base part of the entire device, the rotating base 20 is rotatably connected to the base 10 through a rotating shaft 11, the support base 30 is fixedly connected to the rotating base 20, and the clamping assembly is located above the support base 30, and the support base 30 includes two supporting surfaces 31, a supporting pin 32, and a positioning ball head 33 respectively located on both sides thereof. The distance between the two supporting surfaces 31 is equivalent to the distance between the two webs 92 on the brake shoe. When positioning the brake shoe, the two supporting surfaces 31 are respectively abutted against the opposite surfaces of the two webs 92 to align the two webs 92 For support, the two ends of the support pin 32 protrude from the two supporting surfaces 31 respectively, so that the protruding parts at both ends of the support pin 32 can respectively support one end of the two webs 92, and the positioning ball head 33 is used to be embedded in the pit of the matching part 93 from below the brake shoe's matching part 93, to support and position the matching part 93, and the support pin 32 and the positioning ball head 33 are respectively located at the two ends of the support seat 30, so that the support pin 32 and the positioning ball head 33 are arranged in the extension direction of the rotating shaft 11; the clamping assembly 40 is used to press the outer surface of the wing plate 91 downward above the brake shoe wing plate 91, and cooperate with the support pin 32 and the positioning ball head 33 to press the end of the web 92 away from the support pin 32 onto the matching part 93 located on the positioning ball head 33.

[0023] When welding the brake shoe, the assembly consisting of the wing plate 91 and the two webs 92 is placed on the support seat 30, with one end of the web 92 supported by the support pin 32. The mating piece 93 is placed on the positioning ball head 33, and the other end of the web 92 is pressed against the mating piece 93. Then, the wing plate 91 is pressed downward by the clamping assembly 40, so that the other end of the web 92 presses the mating piece 93 downward. In the present utility model, the portion that supports and positions the mating piece is configured as a positioning ball head, so that when the clamping assembly presses down the wing plate, one end of the web is supported by the support pin, and the other end of the web can press the mating piece downward as much as possible. During the process of being pressed, the mating piece can rotate freely relative to the positioning ball head. When the mating piece rotates, it can better contact the web, thereby eliminating the fitting gap at the junction of the mating piece and the web, which is beneficial to improving the welding accuracy of the web and the mating piece during welding.

[0024] In a preferred embodiment, the positioning ball head 33 of the present invention is replaceable to facilitate positioning of the mating member 93 of different brake shoes. Specifically, the positioning ball head 33 is provided with a downwardly extending connecting rod 331, which is connected to the support base 30 and fixed to the support base 30 from bottom to top by a connecting bolt 332. When corresponding positioning ball heads 33 are used for different mating members 93, the corresponding positioning ball heads 33 can be replaced. The support base 30 is provided with a downwardly recessed recess, in which the positioning ball head 33 is disposed. The bottom surface of the recess is provided with a connecting hole for the connecting rod 331 to pass through. A vertical support plate 34 is provided on the side of the recess away from the support pin 32. The support plate 34 forms a vertically extending support wall facing a side of the positioning ball head 33. The support wall can be pressed against the outer side of the mating member 93 during positioning to support the mating member 93 horizontally, preventing the mating member 93 from detaching due to rotation relative to the positioning ball head 33 when placed on the positioning ball head 33.

[0025] The clamping assembly 40 includes an adjustment bolt 42 threaded onto the rotating base 20 and extending in the height direction, and a pressure block 41 secured to the adjustment bolt and located above the support base 30. By rotating the adjustment bolt 42, the height of the pressure block 41 is adjusted, allowing it to move downward to compress the brake shoe's wing 91 downward. Two upwardly extending connecting rods 43 are secured to the rotating base 20, one on each side of the support base 30. A crossbeam 44, located above the support base 30, is fixedly connected between the tops of the two connecting rods 43. The adjustment bolt is threaded onto the middle portion of the crossbeam 44.

[0026] In the present invention, a counterweight block 21 is provided at the bottom of the rotating seat 20, and the counterweight block 21 is located below the rotating shaft 11. Under the premise that the rotational freedom of the rotating shaft 11 relative to the base 10 is not limited, the counterweight block 21 enables the support seat 30 located on the rotating seat 20 to always remain in a state directly above the rotating seat 20. In this way, the brake shoe can be conveniently installed on the support seat 30; when the welding is completed and the rotational freedom of the rotating shaft 11 relative to the base 10 is released, the safety hazard caused by the rapid swing of the rotating seat 20 due to the excessive weight of the support seat 30 and the brake shoe thereon can be prevented.

[0027] Two swivel seats 12 are provided on the base 10, and the two ends of the rotating shaft 11 are pivotally connected to the two swivel seats 12 through bearings. One end of the rotating shaft 12 is fixedly connected to a dividing plate 14, and a plurality of positioning holes 141 are provided on the outer peripheral surface of the dividing plate 14. The plurality of positioning holes 141 are arranged along the circumference of the dividing plate 14. A fixing sleeve 13 is fixedly connected to one of the swivel seats 12. The fixing sleeve 13 is sleeved on the dividing plate 14, and a positioning pin 15 that can move along its radial direction is provided on the fixing sleeve 13. The inner end of the positioning pin 15 can be inserted into one of the positioning holes 141, and the positioning pin 15 is used to lock the freedom of rotation of the dividing plate 14 relative to the fixing sleeve 12. That is, the positioning pin 15 is used to lock the freedom of rotation of the rotating shaft 11 relative to the base 10. By inserting the positioning pin 15 into different positioning holes 141, the brake shoe on the support seat 30 is fixed at different angles, thereby facilitating welding of the web 92 and the mating part 93.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. Brake shoe welding positioning device, characterized in that: It includes a base, a rotating base rotatably mounted on the base via a rotating shaft, a supporting base fixedly connected to the rotating base, and a pressing assembly located above the supporting base; The support seat includes support surfaces, support pins, and positioning ball heads located on both sides thereof for supporting the two webs of the brake shoe, respectively. The two ends of the support pins protrude from the two support surfaces respectively to support one end of the two webs of the brake shoe, and the positioning ball heads are used to be embedded in the matching pieces under the matching pieces located at the other end of the two webs of the brake shoe to support and position the matching pieces. The support pins and the positioning ball heads are arranged in the extending direction of the rotating shaft. The clamping assembly is used to press the outer surface of the brake shoe wing plate downward above the brake shoe wing plate.

2. The brake shoe welding positioning device according to claim 1, characterized in that: A connecting rod extending downward is arranged on the positioning ball head. The connecting rod is connected to the supporting seat and is fixedly connected to the supporting seat through a connecting bolt.

3. The brake shoe welding positioning device according to claim 2, characterized in that: The support seat is provided with a downwardly sunken recess in which the positioning ball head is located. A connecting hole for the connecting rod to pass through is provided on the bottom surface of the recess. A supporting wall extending vertically to support the brake shoe mating piece is provided on one side of the recess away from the supporting pin.

4. The brake shoe welding positioning device according to claim 1, characterized in that: The clamping assembly comprises an adjusting bolt which is threaded on the rotating seat and extends in the height direction, and a pressing block which is fixed on the adjusting bolt and located above the supporting seat.

5. The brake shoe welding positioning device according to claim 4, characterized in that: Two connecting rods extending upward and respectively located on both sides of the support seat are fixed on the rotating seat, a crossbeam located above the support seat is fixed between the tops of the two connecting rods, and an adjusting bolt is screwed on the middle part of the crossbeam.

6. The brake shoe welding positioning device according to claim 1, characterized in that: A counterweight block is arranged at the bottom of the rotating seat, and the counterweight block is located below the rotating shaft.

7. The brake shoe welding positioning device according to claim 1, characterized in that: Two swivel seats are arranged on the base, and the two ends of the rotating shaft are pivotally connected to the two swivel seats respectively. One end of the rotating shaft is fixedly connected to a dividing plate, and the outer peripheral surface of the dividing plate is provided with a plurality of positioning holes arranged along the circumference of the dividing plate. One of the swivel seats is fixedly connected to a set of fixed sleeves arranged on the periphery of the dividing plate, and a positioning pin which can move along the radial direction of the fixed sleeve is penetrated on the fixed sleeve, and the inner end of the positioning pin is used to be penetrated into one of the positioning holes to limit the freedom of rotation of the dividing plate relative to the fixed sleeve.

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