Mechanism and method for replacing brake pad of external embracing type brake hoop of beam-pumping unit

Abstract

The invention provides a mechanism and method for replacing a brake pad of an external embracing type brake hoop of a beam-pumping unit, the mechanism comprises an operation platform, a special clamp for the brake hoop and a special bit for the brake pad, and the mechanism and the method are completed by matching with the operation platform from four aspects of taking an original brake pad, taking an original rivet, positioning and punching a new brake pad, cutting the new brake pad and riveting the new brake pad. According to the method, traditional multi-person operation is simplified into one-person independent operation on the aspect of human resource use, safety and rapidness are achieved, the operation difficulty and the labor intensity of post staff are greatly reduced, and the effective utilization rate of human resources is increased.

Description

Technical Field

[0001] This application relates to the technical field of beam pumping units, specifically to a mechanism and method for replacing brake pads on an externally mounted brake clamp of a beam pumping unit. Background Technology

[0002] Currently, in oilfield production, most beam pumping units use external brakes for safety braking. After prolonged use, the brake pads and brake clamps wear down through continuous tension and contraction, causing the clearance to exceed technical specifications, leading to brake failure or ineffectiveness. In severe cases, this poses a significant safety hazard to pumping unit maintenance and repair operations, necessitating the replacement of the external brake pads on beam pumping units. Traditional methods for replacing external brake pads on beam pumping units are cumbersome, requiring 3-4 people to operate. This is not only time-consuming and labor-intensive but also inefficient, severely restricting the utilization rate of human resources during the oilfield's modernization process. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a mechanism and method for replacing brake pads on externally mounted brake clamps of a beam pumping unit, thereby reducing the difficulty of replacing brake pads on externally mounted brake clamps by means of a new operation method. The operation can be completed by one person or by multiple people in an assembly line, thereby improving operation efficiency and reducing operation intensity.

[0004] The embodiments of this application are implemented as follows:

[0005] This application provides a mechanism for replacing brake pads on an externally mounted brake clamp of a beam pumping unit, characterized in that it includes an operating platform, a special clamp for brake clamps, and a special bit for brake pads.

[0006] The operating platform includes a support box, a brake clamp left rotation support device and a brake clamp right rotation support device, with the left and right ends of the brake clamp being rotated and supported by the brake clamp left rotation support device and the brake clamp right rotation support device, respectively.

[0007] The brake clamp is configured with the brake clamp structure to clamp the brake pads and brake clamp.

[0008] The brake pad-specific bit includes a rivet removal bit and a rivet bit, which are respectively installed and connected to the brake pad rivet gun head to perform rivet removal and rivet operations.

[0009] In some optional embodiments, the brake clamp left rotation support device includes a left support column, a left rotation pin, a left anti-rotation component, and a left adjustment and fixing component. The left rotation pin is horizontally inserted into the upper part of the left support column and connected by a positioning pin. The left anti-rotation component is installed at the top of the left support column and is installed correspondingly to the left rotation pin to form a locking limit. The left adjustment and fixing component includes an adjustment plate and a hinge seat. One side of the adjustment plate is fixed to the inner end of the left rotation pin. The adjustment plate is provided with an adjustment hole. The hinge seat includes a U-shaped seat body and a hinge shaft fixed on the seat body. An adjustment threaded rod is provided at the center of the bottom surface of the seat body, which passes through the adjustment hole and is positioned by an adjustment nut. The hinge shaft is fitted into the hinge end hole of the brake clamp, and the brake clamp rotates around the hinge shaft.

[0010] In some optional embodiments, the brake clamp right rotation support device includes a right support column, a right rotation pin, a right anti-rotation component, and a right adjustment and fixing component. The right rotation pin is horizontally inserted into the upper part of the right support column and connected by a positioning pin. The right anti-rotation component is installed at the top of the right support column and is installed correspondingly to the right rotation pin to form a locking limit. The right adjustment and fixing component includes a mounting plate, a fixing stud, and a locking nut. The mounting plate is fixed to the inner end of the right rotation pin, and the fixing stud is vertically fixed to the mounting plate, passes through the connecting end hole of the brake clamp, and is screwed and locked with the locking nut.

[0011] In some optional embodiments, the brake clamp special fixture includes a "convex" shaped clamping block and a positioning clamping rod. The "convex" shaped clamping block has an outwardly protruding U-shaped section and two horizontally extending sections on both sides. The ends of the two horizontally extending sections and the two ends of the positioning clamping rod are all provided with inner groove openings. The "convex" shaped clamping block is installed corresponding to the outwardly convex surface of the brake clamp, and the positioning clamping rod is installed corresponding to the inwardly concave surface of the brake clamp. The inner groove openings are connected and clamped and positioned one-to-one by connecting screws.

[0012] In some optional implementations, the rivet-removing bit includes a rivet-removing threaded section, a rivet-removing retaining ring, and a push rod section arranged in sequence. The rivet-removing threaded section is connected to the brake pad rivet gun head, and the push rod section corresponds to the rivet to be removed.

[0013] In some alternative implementations, the rivet bit includes a threaded section, a retaining ring, and a rivet rod section arranged in sequence, wherein the threaded section is connected to the brake pad rivet gun head, and the rivet rod section corresponds to the rivet to be riveted.

[0014] In some alternative implementations, a brake pad cutting fixture, including a brake pad clamping plate and a bench vise, is mounted on the top surface of the support housing. The bench vise is fixed to the support housing, and the brake pad clamping plate is fixed to the bench vise, clamping or separating with the bench vise.

[0015] In some optional embodiments, both the left and right anti-rotation components include a rotary adjusting screw and a locking slip. The locking slip has a semi-circular arc structure and is inserted into the bottom center of the rotary adjusting screw. The locking slip is configured and fitted with the left and right rotating pins. The rotary adjusting screw is threadedly connected to the top of the left and right support columns. The top of the rotary adjusting screw has a radial through hole configured with a positioning pin.

[0016] In some alternative implementations, the fixing stud is welded to the mounting plate at an angle of 8-15 degrees clockwise relative to the vertical direction, the hinge end of the brake clamp is set horizontally, and the connecting end of the brake clamp is set at an angle of 8-15 degrees clockwise relative to the horizontal direction.

[0017] The method of using a mechanism for replacing brake pads on an externally mounted brake clamp of a beam pumping unit is characterized by the following steps:

[0018] Step a, remove the original brake pads:

[0019] Loosen the locking nut and adjusting nut, first install the hinged end of the brake clamp onto the hinge seat, adjust the position of the hinge seat on the adjusting plate, and fix the hinge seat after the position is appropriate; rotate the brake clamp to the horizontal position, and then tighten the adjusting nut and locking nut respectively. After tightening the brake clamp, use an electric scraper to remove the brake pads to be replaced.

[0020] Step b, remove the original rivet:

[0021] Connect the hydraulic station, install the rivet removal bit on the special brake pad rivet gun head, and remove the rivet to be removed along the original rivet hole of the brake clamp;

[0022] Step c, Installing new brake pads:

[0023] Fix the new brake pads in the brake pad cutting plate fixture and cut them with an electric saw; after cutting, fix the brake pads to the concave surface of the brake hoop using a special brake hoop fixture; then loosen the left and right anti-rotation components respectively, rotate the brake hoop to the upper position, and then tighten the left and right anti-rotation components, and use a special drill bit to drill holes along the outer convex surface of the brake hoop in sequence; then loosen the left and right anti-rotation components respectively, rotate the brake hoop to the lower position and tighten the left and right anti-rotation components, and then use a special drill bit to drill countersunk holes along the inner concave surface of the brake hoop in sequence;

[0024] Step d: Rivet new brake pads:

[0025] Loosen the left and right anti-rotation components respectively, rotate the brake clamp to a horizontal position, insert rivets into the rivet holes one by one, connect the hydraulic station, install the rivet bit on the special brake pad rivet gun head, and rivet the new rivets one by one along the original rivet holes of the brake clamp.

[0026] The beneficial effects of this application are as follows: This application provides a mechanism and method for replacing brake pads on external brake clamps of a beam pumping unit. It changes the cumbersome traditional method of replacing brake clamps and brake pads. By innovating the method from four aspects—removing the original brake pads, removing the original rivets, positioning and drilling holes for the new brake pads, cutting the new brake pads, and riveting the new brake pads—and in conjunction with an operating platform, it is possible to replace brake pads by one person or by multiple people in an assembly line operation on the operating platform. It is safe and fast, and the operation time for replacing a single brake pad is reduced from 1-2 hours to 10 minutes. This greatly reduces the difficulty of operation and the labor intensity of employees, and improves the effective utilization rate of human resources. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the structure of the left adjustment fixing component according to an embodiment of this application;

[0030] Figure 3 This is a schematic diagram of the right adjustment and fixing component according to an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the structure of the "convex" shaped clamping block according to an embodiment of this application;

[0032] Figure 5 This is a schematic diagram of the rivet bit removal structure according to an embodiment of this application;

[0033] Figure 6 This is a schematic diagram of the structure of a rivet bit according to an embodiment of this application;

[0034] Figure 7 This is a schematic diagram of the anti-rotation component according to an embodiment of this application. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and 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 on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] The features and performance of this application will be further described in detail below with reference to the embodiments.

[0043] like Figure 1 As shown, the present invention proposes a mechanism for replacing brake pads on an externally mounted brake clamp of a beam pumping unit, including an operating platform, a special clamp for brake clamps, and a special bit for brake pads; the operating platform includes a support box 1, a left-hand rotation support device for brake clamps and a right-hand rotation support device for brake clamps, and the left and right ends of the brake clamp are respectively rotated and supported by the left-hand rotation support device for brake clamps and the right-hand rotation support device for brake clamps.

[0044] The brake clamp is designed to fit the brake clamp structure, clamping the brake pads and brake clamp for easy riveting and pressing operations.

[0045] The brake pad special bit includes a rivet bit 2 and a rivet bit 3, which are respectively installed and connected to the brake pad rivet gun head to perform rivet removal and rivet operations.

[0046] The brake clamp left rotation support device includes a left support column 4, a left rotation pin 5, a left anti-rotation component 6, and a left adjustment and fixing component. The left rotation pin is horizontally inserted into the upper part of the left support column and connected by a positioning pin. The left anti-rotation component is installed at the top of the left support column and is installed correspondingly to the left rotation pin to form a locking limit. The left adjustment and fixing component includes an adjustment plate 7 and a hinge seat 8. One side of the adjustment plate is fixed to the inner end of the left rotation pin. The adjustment plate is provided with an adjustment hole 9. The hinge seat includes a U-shaped seat body and a hinge shaft 10 fixed on the seat body. An adjustment threaded rod 11 is provided at the center of the bottom surface of the seat body, which passes through the adjustment hole and is positioned by an adjustment nut 12 (see...). Figure 2 The hinge shaft is fitted into the hinge end hole of the brake clamp, allowing the brake clamp to rotate around the hinge shaft. The hinge seat can be adjusted to change its position on the fixed plate according to different brake clamp diameters, increasing the applicability of the device. Simultaneously, one end of the brake clamp is hinged to the hinge seat, enabling the brake clamp to rotate along the hinge shaft, allowing for flexible application during installation and construction. After both ends of the brake clamp are securely connected, the left and right rotating pins can be used to rotate the clamp clockwise and counterclockwise, correcting any angle of the brake clamp in the vertical direction, facilitating operator adjustment of the brake clamp angle based on their own operating habits.

[0047] The brake clamp right rotation support device includes a right support column 13, a right rotation pin 14, a right anti-rotation component 15, and a right adjustment and fixing component. The right rotation pin is horizontally inserted into the upper part of the right support column and connected by a positioning pin. The right anti-rotation component is installed at the top of the right support column and is installed correspondingly to the right rotation pin to form a locking limit. The right adjustment and fixing component includes a mounting plate 16, a fixing stud 17, and a locking nut 18 (see...). Figure 3 The mounting plate is fixed to the inner end of the right-hand rotating pin, and the fixing stud is vertically fixed to the mounting plate, passing through the connecting end hole of the brake clamp, and screwed into the locking nut for tightening.

[0048] Furthermore, the fixing stud is welded to the mounting plate at an angle of 8-15 degrees clockwise relative to the vertical direction. The hinge end of the brake clamp is horizontally positioned, and the connecting end of the brake clamp is also set at an angle of 8-15 degrees clockwise relative to the horizontal direction. Because the brake clamp's working surface is not a regular semi-circular arc structure, when both ends of the brake clamp are connected to the left and right rotating support devices respectively, the horizontal and vertical directions of both ends of the brake clamp are locked. During construction, when the brake clamp needs to be rotated, its irregular arc structure causes horizontal and vertical displacement. Since the ends are locked, the rotation cannot be completed. Therefore, during installation, a certain angular margin needs to be provided to the brake clamp to compensate for the horizontal and vertical displacement, allowing the rotation to be completed smoothly; a 10-degree angle is preferred.

[0049] Due to the unique external structure of the brake clamp, there is a raised rib on its outer convex surface. Ordinary clamps are difficult to fit, so special clamps need to be designed.

[0050] The aforementioned special fixture includes a convex clamping block 19 (see...) Figure 4 The brake pads consist of a U-shaped clamping block with an outwardly protruding section and horizontal extensions on both sides. The ends of the horizontal extensions and the two ends of the clamping rods are each provided with an inner groove 20. The U-shaped clamping block is installed corresponding to the convex surface of the brake pad, and the clamping rod is installed corresponding to the concave surface of the brake pad. The inner grooves are connected and clamped together via connecting screws. When new brake pads are to be riveted, a special clamp is used to clamp and position the brake pads, facilitating subsequent riveting operations.

[0051] Before installing new brake pads, the old brake pads need to be removed. Riveting bit is selected according to the rivet structure design and used in conjunction with the rivet gun to save rivet removal time and manpower.

[0052] like Figure 5As shown, the rivet removal bit includes a rivet-removing threaded section 21, a rivet-removing retaining ring 22, and a push rod section 23 arranged sequentially. The rivet-removing threaded section is connected to the brake pad rivet gun head, and the push rod section corresponds to the rivet to be removed. In use, by aligning the brake pad rivet gun head with the rivet to be removed, and connecting it to the hydraulic station, the brake pad rivet gun head applies a pushing force to the rivet to remove it, saving manpower and improving efficiency.

[0053] like Figure 6 As shown, the rivet bit includes a threaded section 24, a retaining ring 25, and a shank section 26 arranged sequentially. The threaded section is connected to the brake pad rivet gun head, and the shank section corresponds to the rivet to be riveted. In use, the brake pad rivet gun head is connected to the rivet bit, the rivet to be riveted is placed into the rivet hole, and after connecting the hydraulic station, the brake pad rivet gun head performs rivet installation.

[0054] like Figure 7 As shown, both the left and right anti-rotation components include a rotary adjusting screw 27 and a locking slip 28. The locking slip has a semi-circular arc structure and is inserted into the bottom center of the rotary adjusting screw. The locking slip is configured and fitted with the left and right rotating pins. The rotary adjusting screw is threadedly connected to the top of the left and right support columns. The top of the rotary adjusting screw has a radial through hole 29, which is configured with the positioning pin. The rotary screw rotates in both directions to adjust the vertical displacement, causing the locking slip to press down or separate from the left and right rotating pins. When the brake clamp needs to be adjusted by rotation, the rotary screw rotates upward, the locking slip and the rotating pin are no longer pressed together, and the rotating pin of the brake clamp rotates accordingly. When the brake clamp is adjusted to the correct position, the rotary screw rotates downward, the locking slip and the rotating pin are pressed together, the rotating pin cannot rotate, and the brake clamp cannot be adjusted by rotation.

[0055] A brake pad cutting fixture 30 is installed on the top surface of the support box, including a brake pad clamping plate and a vise. The vise is fixed to the support box, and the brake pad clamping plate is fixed to the vise, clamping or separating with the vise. By clamping the brake pads, brake pads of different models of existing brake clamps can be cut to a uniform length. The raw brake pad material is placed into the brake pad clamping plate and clamped before cutting.

[0056] The support box is convenient for storing the parts and tools needed to replace brake pads; the bottom of the support box is designed with casters, which can be moved around more easily than the bench vise platform used for replacing brake pads.

[0057] The process by which the above-mentioned institutions replace brake pads is as follows:

[0058] 1. Remove the original brake pads:

[0059] Loosen the locking nut and adjusting nut, first install the hinged end of the brake clamp on the hinge seat, adjust the position of the hinge seat on the adjusting plate, and fix the hinge seat after the position is appropriate; rotate the brake clamp to the horizontal position, and then tighten the adjusting nut and locking nut respectively. After tightening the brake clamp, use an electric scraper to remove the brake pads to be replaced.

[0060] 2. Remove the original rivet:

[0061] Connect the hydraulic station, install the rivet removal bit on the special brake pad rivet gun head, and remove the rivet to be removed along the original rivet hole of the brake clamp.

[0062] 3. Installation of new brake pads:

[0063] Fix the new brake pads in the brake pad cutting plate fixture and cut them with an electric saw. After cutting, fix the brake pads to the concave surface of the brake hoop using a special brake hoop fixture. Then loosen the left and right anti-rotation components, rotate the brake hoop to the upper position, and tighten the left and right anti-rotation components. Use a special drill bit to drill holes along the outer convex surface of the brake hoop. Then loosen the left and right anti-rotation components, rotate the brake hoop to the lower position, tighten the left and right anti-rotation components, and use a special drill bit to drill countersunk holes along the inner concave surface of the brake hoop.

[0064] 4. Rivet new brake pads:

[0065] Loosen the left and right anti-rotation components respectively, rotate the brake clamp to a horizontal position, insert rivets into the rivet holes one by one, connect the hydraulic station, install the rivet bit on the special brake pad rivet gun head, and rivet the new rivets one by one along the original rivet holes of the brake clamp.

[0066] The above description represents only a preferred embodiment of this intellectual property, but the intellectual property should not be limited to the content disclosed in this embodiment and the accompanying drawings. All equivalents or modifications made without departing from the spirit of this invention fall within the scope of protection of this invention.

Claims

1. A mechanism for replacing brake pads on an externally mounted brake clamp of a beam pumping unit, characterized in that, Includes operating platform, special clamps for brake clamps, and special bits for brake pads; The operating platform includes a support box, a brake clamp left rotation support device and a brake clamp right rotation support device, with the left and right ends of the brake clamp being rotated and supported by the brake clamp left rotation support device and the brake clamp right rotation support device, respectively. The brake clamp is configured with the brake clamp structure to clamp the brake pads and brake clamp. The brake pad-specific bit includes a rivet removal bit and a rivet bit, which are respectively installed and connected to the brake pad rivet gun head to perform rivet removal and rivet operations.

2. The mechanism for replacing brake pads on an externally mounted brake clamp of a beam pumping unit according to claim 1, characterized in that, The brake clamp left rotation support device includes a left support column, a left rotation pin, a left anti-rotation component, and a left adjustment and fixing component. The left rotation pin is horizontally inserted into the upper part of the left support column and connected by a positioning pin. The left anti-rotation component is installed at the top of the left support column and is installed correspondingly to the left rotation pin to form a locking limit. The left adjustment and fixing component includes an adjustment plate and a hinge seat. One side of the adjustment plate is fixed to the inner end of the left rotation pin. The adjustment plate is provided with an adjustment hole. The hinge seat includes a U-shaped seat body and a hinge shaft fixed on the seat body. An adjustment threaded rod is provided at the center of the bottom surface of the seat body, which passes through the adjustment hole and is positioned by an adjustment nut. The hinge shaft is fitted into the hinge end hole of the brake clamp, and the brake clamp rotates around the hinge shaft.

3. The mechanism for replacing brake pads on an externally mounted brake clamp of a beam pumping unit according to claim 2, characterized in that, The brake clamp right rotation support device includes a right support column, a right rotation pin, a right anti-rotation component, and a right adjustment and fixing component. The right rotation pin is horizontally inserted into the upper part of the right support column and connected by a positioning pin. The right anti-rotation component is installed at the top of the right support column and is installed correspondingly to the right rotation pin to form a locking limit. The right adjustment and fixing component includes a mounting plate, a fixing stud, and a locking nut. The mounting plate is fixed to the inner end of the right rotation pin, and the fixing stud is vertically fixed to the mounting plate, passes through the connecting end hole of the brake clamp, and is screwed and locked with the locking nut.

4. The mechanism for replacing brake pads on an externally mounted brake clamp of a beam pumping unit according to claim 1 or 3, characterized in that, The brake clamp fixture includes a convex clamping block and a positioning clamping rod. The convex clamping block has an outwardly convex U-shaped section and two horizontally extending sections on both sides. The ends of the two horizontally extending sections and the two ends of the positioning clamping rod are provided with inner grooves. The convex clamping block is installed corresponding to the outwardly convex surface of the brake clamp, and the positioning clamping rod is installed corresponding to the inwardly concave surface of the brake clamp. The inner grooves are connected and clamped and positioned one by one by connecting screws.

5. The mechanism for replacing brake pads on an externally mounted brake clamp of a beam pumping unit according to claim 1, characterized in that, The rivet-removing bit includes a rivet-removing threaded section, a rivet-removing retaining ring, and a push rod section arranged in sequence. The rivet-removing threaded section is connected to the brake pad rivet gun head, and the push rod section corresponds to the rivet to be removed.

6. The mechanism for replacing brake pads on an externally mounted brake clamp of a beam pumping unit according to claim 1 or 5, characterized in that, The rivet bit includes a threaded section, a retaining ring, and a rivet rod section arranged in sequence. The threaded section is connected to the brake pad rivet gun head, and the rivet rod section corresponds to the rivet to be riveted.

7. The mechanism for replacing brake pads on an externally mounted brake clamp of a beam pumping unit according to claim 1, characterized in that, A brake pad cutting fixture, including a brake pad clamping plate and a bench vise, is installed on the top surface of the support box. The bench vise is fixed to the support box, and the brake pad clamping plate is fixed to the bench vise and clamps or separates with the bench vise.

8. The mechanism for replacing brake pads on an externally mounted brake clamp of a beam pumping unit according to claim 3, characterized in that, Both the left and right anti-rotation components include a rotary adjusting screw and a locking slip. The locking slip has a semi-circular arc structure and is inserted into the bottom center of the rotary adjusting screw. The locking slip is configured and fitted with the left and right rotating pins. The rotary adjusting screw is threadedly connected to the top of the left and right support columns. The top of the rotary adjusting screw has a radial through hole configured with the positioning pin.

9. The mechanism for replacing brake pads on an externally mounted brake clamp of a beam pumping unit according to claim 3 or 8, characterized in that, The fixing stud is welded to the mounting plate at an angle of 8-15 degrees clockwise relative to the vertical direction. The hinge end of the brake clamp is set horizontally, and the connecting end of the brake clamp is set at an angle of 8-15 degrees clockwise relative to the horizontal direction.

10. A method of using the mechanism for replacing brake pads on an externally mounted brake clamp of a beam pumping unit as described in claim 6, characterized in that, Includes the following steps: Step a, remove the original brake pads: Loosen the locking nut and adjusting nut, first install the hinged end of the brake clamp onto the hinge seat, adjust the position of the hinge seat on the adjusting plate, and fix the hinge seat after the position is appropriate; rotate the brake clamp to the horizontal position, and then tighten the adjusting nut and locking nut respectively. After tightening the brake clamp, use an electric scraper to remove the brake pads to be replaced. Step b, remove the original rivet: Connect the hydraulic station, install the rivet removal bit on the special brake pad rivet gun head, and remove the rivet to be removed along the original rivet hole of the brake clamp; Step c, Installing new brake pads: Fix the new brake pads in the brake pad cutting plate fixture and cut them with an electric saw; after cutting, fix the brake pads to the concave surface of the brake hoop using a special brake hoop fixture; then loosen the left and right anti-rotation components respectively, rotate the brake hoop to the upper position, and then tighten the left and right anti-rotation components, and use a special drill bit to drill holes along the outer convex surface of the brake hoop in sequence; then loosen the left and right anti-rotation components respectively, rotate the brake hoop to the lower position and tighten the left and right anti-rotation components, and then use a special drill bit to drill countersunk holes along the inner concave surface of the brake hoop in sequence; Step d: Rivet new brake pads: Loosen the left and right anti-rotation components respectively, rotate the brake clamp to a horizontal position, insert rivets into the rivet holes one by one, connect the hydraulic station, install the rivet bit on the special brake pad rivet gun head, and rivet the new rivets one by one along the original rivet holes of the brake clamp.

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