Fixture for drilling plunger pump motor shell

Abstract

The utility model relates to a clamp for drilling of a plunger pump motor shell. The clamp comprises a base, a clamp body and a positioning shaft. The clamp body is used for clamping a plunger pump motor shell. The clamp body is rotationally connected to the base. At least two groups of drill bushings are arranged on the clamp body; at least two positioning sleeves are arranged on the clamp body; the positioning shaft is configured to be matched with the positioning sleeve and the base and is configured to be used for limiting the rotational degree of freedom of the clamp body relative to the base; and under the condition that the fixture body drives the plunger pump motor shell to rotate to a preset angle, the positioning shaft is configured to extend into the corresponding positioning sleeve, so that the corresponding drilling sleeve is kept at the position matched with the drilling device. The positioning and clamping requirements for machining of all hole series of the plunger pump motor shell can be met only through one-time clamping, precision reduction caused by multiple times of clamping is avoided, the shell machining quality is improved, the labor intensity of workers is relieved, the machining efficiency is improved, and the machining cost and the equipment maintenance cost are reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of mechanical processing equipment, and in particular to a fixture for drilling holes in a plunger pump motor housing. Background Art

[0002] When drilling holes in piston pump motor housings, the existing technology requires a separate drilling tool for each hole system to be machined. For example, machining a bent-axis axial piston pump motor housing involves four sets of holes, requiring four separate processing steps. Each step uses a radial drilling machine equipped with a set of drilling tools, for a total of four sets. Furthermore, the positioning datum for each step is based on the previous hole system. This results in machining errors being accumulated to the next step, reducing machining accuracy and ultimately resulting in poor product quality.

[0003] Existing technologies present urgent technical challenges, including lengthy processes, numerous setups, and significant machining errors. Furthermore, the multiple machining steps impose high labor intensity, low machining efficiency, and prolonged equipment utilization. These factors combine to produce low-quality machining of the plunger pump motor housing bore system, while also resulting in high machining costs. Furthermore, the ongoing maintenance costs of multiple sets of drilling tools are substantial. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the present disclosure provides a fixture for drilling holes in a plunger pump motor housing.

[0005] According to a first aspect of the present disclosure, a fixture for drilling a plunger pump motor housing is provided, comprising:

[0006] base;

[0007] A fixture body is used to clamp the plunger pump motor housing; the fixture body is rotatably connected to the base; at least two sets of drill sleeves are provided on the fixture body; at least two positioning sleeves are provided on the fixture body;

[0008] a positioning shaft configured to be adapted to the positioning sleeve and the base, and configured to limit the rotational freedom of the fixture body relative to the base;

[0009] When the clamp body drives the plunger pump motor housing to rotate to a preset angle, the positioning shaft is configured to extend into the corresponding positioning sleeve to keep the corresponding drill sleeve in a position that cooperates with the drilling device.

[0010] In one embodiment of the present disclosure, the clamp body includes a box body, in which an inner cavity is provided; the inner cavity is constructed to accommodate the plunger pump motor housing, and is constructed into a shape adapted to the plunger pump motor housing to limit the rotational freedom of the plunger pump motor housing relative to the box body.

[0011] In one embodiment of the present disclosure, the box includes a fixing plate, defining an X-axis and a Y-axis perpendicular to the plane of the fixing plate; a first limiting portion is provided on an inner wall of the fixing plate;

[0012] A first mating portion is provided on the side of the plunger pump motor housing located in the inner cavity close to the fixed plate; the first mating portion is constructed to be able to cooperate with the first limiting portion to limit the translational freedom of the plunger pump motor housing on the X-axis and the Y-axis.

[0013] In one embodiment of the present disclosure, an opening is provided on one side of the box body, and the plunger pump motor housing is configured to be able to enter the inner cavity through the opening; the clamp body also includes a first drilling template, which is constructed to be detachably connected to the box body to open or close the opening.

[0014] In one embodiment of the present disclosure, a second limiting portion is provided on the first drilling template; a second matching portion is provided on the side of the plunger pump motor housing located in the inner cavity close to the opening, and the second matching portion is constructed to be able to cooperate with the second limiting portion to fix the plunger pump motor housing in the inner cavity.

[0015] In one embodiment of the present disclosure, the first drilling template is configured to be mounted to the box body via a first positioning pin and a second positioning pin; a first positioning hole and a second positioning hole corresponding to the first positioning pin and the second positioning pin are respectively provided on an end surface of the box body having an opening;

[0016] The first positioning pin and the second positioning pin are both constructed as round pins, one of the first positioning hole and the second positioning hole is constructed as a round hole, and the other is constructed as an elongated hole; or, the first positioning hole and the second positioning hole are both constructed as round holes, one of the first positioning pin and the second positioning pin is constructed as a round pin, and the other is constructed as a diamond pin.

[0017] In one embodiment of the present disclosure, the base includes a bottom plate supported on the working surface, and two brackets extending upward from the bottom plate; the two brackets are constructed to be arranged at intervals on the bottom plate, and the clamp body is constructed to be rotatably connected between the two brackets.

[0018] In one embodiment of the present disclosure, a through hole is provided on one of the brackets, and the positioning shaft is constructed to be detachably passed through the through hole and the positioning sleeve; the positioning shaft is constructed to be parallel to the rotation axis of the clamp body.

[0019] In one embodiment of the present disclosure, the fixture body includes a first side plate adjacent to the positioning shaft, and at least two positioning sleeves are disposed on the first side plate;

[0020] Define a circle A in the plane of the first side plate, the center of the circle A is located on the rotation axis of the fixture body, and the radius of the circle A is the distance between the rotation axis of the fixture body and the positioning axis; the centers of the multiple positioning sleeves are constructed to be distributed on the circle A.

[0021] In one embodiment of the present disclosure, the fixture body includes at least two drilling templates arranged on different surfaces; each drilling template is provided with at least one drill sleeve; the drill sleeve is at least one of a fixed drill sleeve and a quick-change drill sleeve.

[0022] One beneficial effect of the present disclosure is the provision of a rotary fixture. A plunger pump motor housing to be machined can be clamped to the fixture body and rotated relative to the base with the fixture body. When rotated to a preset angle, a positioning shaft can maintain the fixture body in a position that matches the drilling device. The drill bit of the drilling device can then, through the drill sleeve, machine a hole system in the plunger pump motor housing clamped to the fixture body.

[0023] The present invention achieves the positioning and clamping requirements for machining each hole system in a plunger pump motor housing with a single clamping operation, avoiding the loss of precision caused by multiple clamping operations and improving machining quality. Compared with traditional processes that require multiple sets of drilling tools for multiple machining steps, the present invention reduces clamping times, reduces worker labor intensity, improves machining efficiency, shortens machining cycles, reduces machining costs and equipment maintenance costs, and creates economic benefits.

[0024] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0026] Figure 1 is a cross-sectional view of a clamp provided by an embodiment of the present disclosure;

[0027] Figure 2 is a cross-sectional view of a clamp body provided by an embodiment of the present disclosure;

[0028] Figure 3 is a cross-sectional view of the clamp body from another angle provided by an embodiment of the present disclosure;

[0029] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle;

[0030] Figure 5 yes Figure 3 Schematic diagram of the arrangement of the four positioning sleeves.

[0031] Figures 1 to 5 The one-to-one correspondence between the component names and the reference numerals is as follows:

[0032] 1. Base; 11. Bottom plate; 121. Movable bracket; 122. Fixed bracket; 13. Rotating shaft sleeve; 14. Rotating shaft; 15. Positioning sleeve; 2. Fixture body; 20. Box body; 201. Inner cavity; 21. Positioning sleeve; 22. Drill sleeve; 23. Fixed plate; 24. First drilling template; 240. Second limiting part; 241. Round pin; 242. Screw; 243. Washer; 244. Nut; 245. Rotating pin; 246. Handle; 25. Second drilling template; 26. First side plate; 27. Second side plate; 28. Third drilling template; 3. Positioning shaft; 4. Plunger pump motor housing. DETAILED DESCRIPTION

[0033] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure.

[0034] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0035] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0036] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0037] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0038] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the prerequisite for each other's existence.

[0039] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0040] The present disclosure provides a fixture for drilling holes in a plunger pump motor housing. The fixture can restrict the translational and rotational degrees of freedom of the plunger pump motor housing, thereby securing and positioning the plunger pump motor housing. The fixture can restrain the plunger pump motor housing in a position compatible with a drilling device, wherein the drilling device can be a drilling machine, a punch, a drilling machine, or other equipment capable of drilling holes in the plunger pump motor housing.

[0041] The clamp disclosed herein comprises a base, a clamp body, and a positioning shaft. The base is supported on a work surface, and the clamp body is rotatably connected to the base. The clamp body is used to clamp the plunger pump motor housing. When the clamp body rotates relative to the base, it drives the plunger pump motor housing held therein to rotate along with it.

[0042] The fixture body is equipped with at least two sets of drill bushings. These bushings determine the location of the holes to be machined, guide the drilling tool during machining, improve tool rigidity, and prevent vibration during machining. The two sets of bushings can be located on different sides of the fixture body, corresponding to the hole systems to be machined on different surfaces of the plunger pump motor housing. Each set of bushings can be of different types and sizes, and can be specifically configured based on the specific hole system to be machined.

[0043] The fixture body is also provided with at least two locating sleeves, which can be constructed to be of the same size. A locating shaft is configured to mate with the locating sleeves and the base and is configured to limit the rotational freedom of the fixture body relative to the base. The locating shaft can be movably or detachably connected to the base. The locating sleeves enclose a through hole that mates with the locating shaft, which can be inserted into the through hole of the locating sleeves, thereby preventing the fixture body from rotating further.

[0044] Specifically, when the fixture body rotates the plunger pump motor housing to a preset angle, the positioning shaft is configured to extend into a corresponding positioning sleeve to maintain the corresponding drill sleeve in a position that cooperates with the drilling device. Each positioning sleeve provided on the fixture body has a corresponding drill sleeve. The fixture body can be rotated to different preset angles, allowing the positioning shaft to extend into different positioning sleeves, thereby maintaining the fixture body at different preset angles and, in turn, maintaining the corresponding drill sleeve in a position that cooperates with the drilling device.

[0045] The present disclosure provides a rotary fixture. A plunger pump motor housing to be machined can be clamped to the fixture body and rotated relative to a base with the fixture body. When rotated to a preset angle, a positioning shaft can maintain the fixture body in a position aligned with a drilling device. The drill bit of the drilling device can then, through a drill sleeve, machine a hole system in the plunger pump motor housing clamped to the fixture body.

[0046] The present invention achieves the positioning and clamping requirements for machining each hole system in a plunger pump motor housing with a single clamping operation, avoiding the loss of precision caused by multiple clamping operations and improving machining quality. Compared with traditional processes that require multiple sets of drilling tools for multiple machining steps, the present invention reduces clamping times, reduces worker labor intensity, improves machining efficiency, shortens machining cycles, reduces machining costs and equipment maintenance costs, and creates economic benefits.

[0047] The specific embodiments of the present disclosure are described below with reference to the accompanying drawings.

[0048] refer to Figure 1 The present disclosure provides a fixture for drilling holes in a plunger pump motor housing 4, capable of limiting the translational and rotational degrees of freedom of the plunger pump motor housing 4, thereby securing and positioning the plunger pump motor housing 4. The fixture comprises a base 1, a fixture body 2, and a positioning shaft 3. The base 1 can be supported on a work surface, and the fixture body 2 is rotatably connected to the base 1.

[0049] In one embodiment of the present disclosure, Figure 1 As shown, the base 1 includes a bottom plate 11 supported on a work surface, and two brackets extending upward from the bottom plate 11. The two brackets are configured to be spaced apart on the bottom plate 11. Specifically, the bottom of the bracket can be fixedly connected to the bottom plate 11 by pins or bolts. The clamp body 2 is configured to be rotatably connected between the two brackets. The base 1 also includes a rotating shaft 14. A rotating shaft sleeve 13 can be provided on the bracket. The rotating shaft 14 is rotatably connected within the rotating shaft sleeve 13. The clamp body 2 is rotatably connected between the two brackets via the rotating shaft 14.

[0050] In one embodiment of the present disclosure, Figure 1 As shown, the two brackets are a movable bracket 121 and a fixed bracket 122. Figure 1 In the viewing direction, the bracket on the right is a fixed bracket 122, which can be fixedly connected to the right side of the base plate 11 and cannot move relative to the base plate 11; the bracket on the left is a movable bracket 121, which can be moved and adjusted relative to the base plate 11, thereby changing the space size between the two brackets to adapt to various sizes of clamp bodies 2.

[0051] refer to Figure 2 and Figure 3 The clamp body 2 is used to clamp the plunger pump motor housing 4. Figure 3 The structure shown by the double-dashed line is the plunger pump motor housing 4. When the clamp body 2 rotates relative to the base 1, it drives the plunger pump motor housing 4 held therein to rotate along with it. The specific structure of the clamp body 2 and the specific assembly method of the plunger pump motor housing 4 are described in detail below.

[0052] In one embodiment of the present disclosure, the clamp body 2 includes a housing 20 having an inner cavity 201. The inner cavity 201 is configured to accommodate a plunger pump motor housing 4 and is configured to have a shape that matches the plunger pump motor housing 4 to limit the rotational freedom of the plunger pump motor housing 4 relative to the housing 20. An opening is provided on one side of the housing 20, and the plunger pump motor housing 4 is configured to be able to enter the inner cavity 201 through the opening.

[0053] Specifically, the plunger pump motor housing 4 in this embodiment is a bent axis axial hydraulic pump motor housing, Figure 3 In the viewing direction, the upper part extends vertically and deviates to the right in the middle, thus Figure 3 The housing 20 and its inner cavity 201 are also constructed in a bent shape. There is a certain assembly gap between the plunger pump motor housing 4 and the inner wall of the housing 20. However, the assembly gap can only be used to fine-tune the position of the plunger pump motor housing 4. The plunger pump motor housing 4 cannot rotate freely in the inner cavity 201.

[0054] When assembling the plunger pump motor housing 4, it is necessary to first adjust the plunger pump motor housing 4 and the box body 20 to a mutually compatible angle, and then the plunger pump motor housing 4 can be placed into the inner cavity 201 from the opening. The shape of the box body 20 realizes limiting the rotational freedom of the plunger pump motor housing 4 relative to the fixture body 2.

[0055] In one embodiment of the present disclosure, Figure 3 As shown, the housing 20 comprises a plurality of plates, which enclose an inner cavity 201 and include a fixing plate 23. The fixing plate 23 is the plate of the housing 20 farthest from the opening. When the plunger pump motor housing 4 is placed in the inner cavity 201, its lowermost inclined bottom surface can be in contact with the fixing plate 23.

[0056] The X-axis and Y-axis are defined as being perpendicular to the plane of the fixed plate 23. A first limiting portion is provided on the inner wall of the fixed plate 23, and a first matching portion is provided on the side of the plunger pump motor housing 4 located in the inner cavity 201 close to the fixed plate 23. The first matching portion is constructed to be able to cooperate with the first limiting portion to limit the translational freedom of the plunger pump motor housing 4 on the X-axis and the Y-axis. Specifically, the first limiting portion can be a slot provided on the fixed plate 23, and the first matching portion can be the spindle hole end of the plunger pump motor housing 4, which can be inserted into the slot, so that the plunger pump motor housing 4 cannot be translated on the X-axis and the Y-axis relative to the fixed plate 23.

[0057] In one embodiment of the present disclosure, reference Figures 2 to 4 The fixture body 2 also includes a first drilling template 24, which is removably connected to the housing 20 to open or close the opening. After the plunger pump motor housing 4 is placed into the inner cavity 201, its position can be fine-tuned so that its upper end surface is substantially horizontal. The first drilling template 24 can then be placed over the opening, thereby enclosing the plunger pump motor housing 4 within the inner cavity 201.

[0058] The first drilling template 24 can be installed on the box body 20 by means of two pins on one side. The first drilling template 24 is configured to be installed on the box body 20 by means of a first positioning pin and a second positioning pin; the box body 20 has an open end surface provided with a first positioning hole and a second positioning hole corresponding to the first positioning pin and the second positioning pin respectively. Figure 2 As shown, the box body 20 may include a first side panel 26 and a second side panel 27 that are spaced apart in parallel. The upper end surfaces of the first side panel 26 and the second side panel 27 are the end surfaces of the box body 20 with openings. The first positioning hole and the second positioning hole may be respectively provided on the upper end surfaces of the first side panel 26 and the second side panel 27.

[0059] In a specific embodiment of the present disclosure, both the first and second locating pins are configured as circular pins 241, and one of the first and second locating holes is configured as a circular hole, while the other is configured as an elongated hole. One circular pin 241 forms a primary locating position with the circular hole, while the other circular pin 241 forms a secondary locating position with the elongated hole. This effectively constrains the six degrees of freedom of the first drilling template 24, ensuring its precise positioning and stability while preventing over-positioning.

[0060] In another specific embodiment of the present disclosure, both the first and second positioning holes are configured as circular holes, with one of the first and second positioning pins configured as a circular pin 241 and the other as a diamond-shaped pin. One of the circular holes can form a primary positioning mechanism with the circular pin 241, while the other circular hole can form a secondary positioning mechanism with the diamond-shaped pin. This effectively limits the six degrees of freedom of the first drilling template 24, ensuring its precise positioning and stability while preventing over-positioning.

[0061] After accurate positioning is achieved by using the method of two pins on one side, Figure 4 As shown, the first drilling template 24 can be fixed to the box body 20 via screws 242 and nuts 244. In a specific embodiment of the present disclosure, multiple screws 242 and nuts 244 can be provided. For example, four screws 242 and four nuts 244 can be provided to comprehensively fix multiple positions of the first drilling template 24. The screws 242 are tightened by the nuts 244. Washers 243 can be provided between the screws 242 and the nuts 244. When tightened, the nuts 244 are pressed against the first drilling template 24 via the washers 243, thereby achieving a fixing effect.

[0062] Screw 242 is rotatably connected to housing 20 via pivot pin 245. A notch is provided on first drilling template 24 to align with the rotational path of screw 242. To remove first drilling template 24, nut 244 is loosened and screw 242 is tilted to one side in the notch of first drilling template 24. Screw 242 rotates along pivot pin 245, disengaging from first drilling template 24, allowing removal of first drilling template 24.

[0063] When installing the first drilling template 24, after placing it on the housing 20, first push the first drilling template 24 horizontally so that the first and second locating pins fall into the first and second locating holes, respectively, to achieve positioning. Then, rotate the screws 242 in the notches of the first drilling template 24 to a vertical position, positioning the first drilling template 24 between the nuts 244 and the housing 20. Then, simply tighten all the nuts 244 to securely attach the first drilling template 24 to the housing 20.

[0064] In one embodiment of the present disclosure, Figure 3 As shown, a handle 246 may be provided on the top end surface of the first drilling template 24, and the handle 246 is constructed as a frame suitable for holding. Figure 2 As shown, two handles 246 can be provided, and the two handles 246 are spaced apart and arranged on the top end face of the first drilling template 24. The staff can grasp the handles 246, thereby facilitating the disassembly and assembly of the first drilling template 24.

[0065] In one embodiment of the present disclosure, Figure 3 As shown, a second limiting portion 240 is provided on the first drilling template 24, and a second matching portion is provided on the side of the plunger pump motor housing 4 located in the inner cavity 201 close to the opening. The second matching portion is constructed to be able to cooperate with the second limiting portion 240 to fix the plunger pump motor housing 4 in the inner cavity 201. The second limiting portion 240 can be a flange provided on the first drilling template 24, and the flange is constructed to protrude from the surface of the first drilling template 24 close to the opening. The second matching portion can be an inner hole on the upper end surface of the plunger pump motor housing 4. When the first drilling template 24 is installed on the housing 20, the second limiting portion 240 can extend into the inner hole on the upper end surface of the plunger pump motor housing 4, thereby limiting the freedom of the plunger pump motor housing 4 in the inner cavity.

[0066] At this point, the plunger pump motor housing 4 is securely fixed within the inner cavity 201, its rotational and translational freedoms relative to the housing 20 being completely restricted, achieving complete positioning. This allows the plunger pump motor housing 4 to rotate relative to the base 1 along with the fixture body 2, without any relative motion with the fixture body 2. By precisely positioning the rotation angle of the fixture body 2, the plunger pump motor housing 4 can be precisely drilled within the inner cavity 201.

[0067] The fixture body 2 is equipped with at least two sets of drill bushings 22. These are used to determine the location of the holes to be machined, guide the tool on the drilling device during machining, improve tool rigidity during machining, and prevent vibration during machining. The at least two sets of drill bushings 22 can be located on different sides of the fixture body 2, corresponding to the hole systems to be machined on different surfaces of the plunger pump motor housing 4. Each set of drill bushings 22 can be of different types and sizes, and can be specifically configured based on the specific hole system to be machined.

[0068] In one embodiment of the present disclosure, the fixture body 2 includes at least two drill templates disposed on different surfaces. Each drill template is equipped with at least one set of drill sleeves 22. Specifically, the drill sleeves 22 can be embedded in the drill template to provide guidance and positioning. The drill sleeves 22 can be at least one of fixed drill sleeves and quick-change drill sleeves. In this embodiment, the plunger pump motor housing 4 has four bore systems to be machined, so the fixture body 2 is equipped with four drill templates and four sets of drill sleeves.

[0069] Specifically, the first drilling template 24 is one of the drilling templates, such as Figure 2 As shown, a set of drill sleeves 22 are provided on the first drilling template 24. The drill sleeves 22 can be quick-change drill sleeves. The aforementioned fixed plate 23 is one of the drilling templates, as shown in FIG. Figure 3 As shown, a set of drill sleeves 22 are provided on the fixing plate 23, and the drill sleeves 22 can be fixed drill sleeves. Figure 3The right side of the box 20 includes a second drilling template 25, and a set of drill sleeves 22 are embedded in the second drilling template 25. Figure 2 In the viewing direction, the front surface of the box body 20 includes a third drilling template 28, and a group of drill sleeves 22 are embedded in the third drilling template 28.

[0070] Four drilling templates are located on different sides of the housing 20 and can each be positioned using a two-pin-on-one-side method. Four sets of drill bushings 22 mate with each of the four drilling templates, thereby determining the locations of the four hole systems on the plunger pump motor housing 4. This disclosure integrates multiple drilling templates and multiple sets of drill bushings 22 into a single fixture, thus avoiding the loss of precision caused by multiple clamping operations and significantly improving positioning accuracy.

[0071] refer to Figure 5 At least two positioning sleeves 21 are also provided on the fixture body 2. As mentioned above, since the plunger pump motor housing 4 has four holes to be processed, four positioning sleeves 21 are provided accordingly, and the four positioning sleeves 21 can be constructed to the same size. Figure 1 As shown, the positioning shaft 3 is configured to be compatible with the positioning sleeve 21 and the base 1, and is configured to limit the rotational freedom of the fixture body 2 relative to the base 1. The positioning shaft 3 can be movably connected or detachably connected to the base 1. The positioning sleeve 21 encloses a through hole that is compatible with the positioning shaft 3. The positioning shaft 3 can be inserted into the through hole of the positioning sleeve 21, thereby preventing the fixture body 2 from further rotating.

[0072] In one embodiment of the present disclosure, a through hole is provided on one of the brackets of the base 1. Figure 1 In the viewing direction, a positioning sleeve 15 is provided on the fixing bracket 122 on the right side, and the positioning sleeve 15 encloses a through hole. The positioning shaft 3 is constructed to be detachable and pass through the through hole and the positioning sleeve 21, thereby limiting the rotational freedom of the clamp body 2 relative to the base 1. The positioning shaft 3 is constructed to be parallel to the rotation axis of the clamp body 2, as shown in FIG. Figure 1 As shown, the positioning shaft 3 is parallel to the axis of the rotating shaft 14 , and the staff can insert and remove the positioning shaft 3 on the side of the clamp, thereby fixing the clamp body 2 at different angles.

[0073] Specifically, when the fixture body 2 drives the plunger pump motor housing 4 to rotate to a preset angle, the positioning shaft 3 is configured to extend into the corresponding positioning sleeve 21 to maintain the corresponding drill sleeve 22 in a position that cooperates with the drilling device. Each positioning sleeve 21 provided on the fixture body 2 has its corresponding drill sleeve 22. The fixture body 2 can be rotated to different preset angles, so that the positioning shaft 3 can extend into different positioning sleeves 21, maintaining the fixture body 2 at different preset angles, and thus maintaining the corresponding drill sleeve 22 in a position that cooperates with the drilling device.

[0074] In one embodiment of the present disclosure, reference Figure 1 and Figure 2 The fixture body 2 includes a first side plate 26 adjacent to the positioning shaft 3, and at least two positioning sleeves 21 are provided on the first side plate 26. In this embodiment, Figure 5 As shown, four positioning sleeves 21 are all arranged on the first side plate 26, defining a circle A in the plane of the first side plate 26, the center of circle A is located on the rotation axis of the fixture body 2, and the radius of circle A is the distance between the rotation axis of the fixture body 2 and the positioning axis 3; the centers of multiple positioning sleeves 21 are constructed to be distributed on circle A.

[0075] The center of circle A is the intersection of the rotating shaft 14 and the first side plate 26. Figure 1 and Figure 5 , the distance R between the rotating shaft 14 and the positioning shaft 3 is the radius of circle A. The distance between the center of each positioning sleeve 21 and the center of circle A is R, which ensures that the positioning sleeve 21 can be rotated to a position that matches the positioning shaft 3. Four positioning sleeves 21 are distributed on circle A. When the positioning shaft 3 is inserted into a positioning sleeve 21, the drill sleeve 22 corresponding to the positioning sleeve 21 can be maintained in a position that matches the drilling device, for example, it can be maintained in a vertical upward position, thus completing one indexing. When the fixture body 2 rotates, the positioning shaft 3 can be inserted into another positioning sleeve 21, and the other set of drill sleeves 22 corresponding to the positioning sleeve 21 can be maintained in a position that matches the drilling device, thus completing a second indexing. The four sets of drill sleeves 22 can move to a position that matches the drilling device in sequence during the rotation of the fixture body 2, completing a total of four indexings, thereby facilitating the drilling device to process the hole systems at four different positions on the plunger pump motor housing 4.

[0076] The present disclosure provides a rotary fixture. A plunger pump motor housing 4 to be machined can be clamped to a fixture body 2 and rotated relative to a base 1 along with the fixture body 2. When rotated to a predetermined angle, a positioning shaft 3 holds the fixture body 2 in position for a drilling device. The drill bit on the drilling device, through a drill sleeve 22, can drill a hole in the plunger pump motor housing 4 clamped to the fixture body 2.

[0077] The present invention achieves the positioning and clamping requirements for machining each hole system in a plunger pump motor housing with a single clamping operation, avoiding the loss of precision caused by multiple clamping operations and improving machining quality. Compared with traditional processes that require multiple sets of drilling tools for multiple machining steps, the present invention reduces clamping times, reduces worker labor intensity, improves machining efficiency, shortens machining cycles, reduces machining costs and equipment maintenance costs, and creates economic benefits.

[0078] The embodiments of the present disclosure have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terms used herein are selected to best explain the principles of the embodiments, their practical applications, or technical improvements in the marketplace, or to enable other persons skilled in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims

1. A fixture for drilling a hole in a plunger pump motor housing, characterized in that: include: A base (1); a clamp body (2) for clamping the plunger pump motor housing (4); the clamp body (2) is rotatably connected to the base (1); at least two sets of drill sleeves (22) are provided on the clamp body (2); at least two positioning sleeves (21) are provided on the clamp body (2); a positioning shaft (3), the positioning shaft (3) being configured to be compatible with the positioning sleeve (21) and the base (1), and configured to limit the rotational freedom of the clamp body (2) relative to the base (1); When the clamp body (2) drives the plunger pump motor housing (4) to rotate to a preset angle, the positioning shaft (3) is configured to extend into the corresponding positioning sleeve (21) to maintain the corresponding drill sleeve (22) in a position that cooperates with the drilling device.

2. The clamp according to claim 1, characterized in that The clamp body (2) includes a housing (20), wherein an inner cavity (201) is provided in the housing (20); the inner cavity (201) is configured to accommodate the plunger pump motor housing (4), and is configured to have a shape that matches the plunger pump motor housing (4) so ​​as to limit the rotational freedom of the plunger pump motor housing (4) relative to the housing (20).

3. The clamp according to claim 2, characterized in that The box (20) includes a fixed plate (23), and defines an X-axis and a Y-axis perpendicular to the plane of the fixed plate (23); a first limiting portion is provided on the inner wall of the fixed plate (23); A first mating portion is provided on a side of the plunger pump motor housing (4) located in the inner cavity (201) close to the fixing plate (23); the first mating portion is configured to be capable of mating with the first limiting portion to limit the translational freedom of the plunger pump motor housing (4) on the X-axis and the Y-axis.

4. The clamp according to claim 2, characterized in that An opening is provided on one side of the box body (20), and the plunger pump motor housing (4) is configured to be able to enter the inner cavity (201) through the opening; the clamp body (2) also includes a first drilling template (24), which is constructed to be detachably connected to the box body (20) to open or close the opening.

5. The clamp according to claim 4, characterized in that A second limiting portion (240) is provided on the first drilling template (24); a second matching portion is provided on a side of the plunger pump motor housing (4) located in the inner cavity (201) close to the opening, and the second matching portion is configured to be able to cooperate with the second limiting portion (240) to fix the plunger pump motor housing (4) in the inner cavity (201).

6. The clamp according to claim 4, characterized in that The first drilling template (24) is configured to be mounted on the box body (20) via a first positioning pin and a second positioning pin; a first positioning hole and a second positioning hole corresponding to the first positioning pin and the second positioning pin are provided on an open end surface of the box body (20); The first positioning pin and the second positioning pin are both constructed as circular pins (241), one of the first positioning hole and the second positioning hole is constructed as a circular hole, and the other is constructed as an elongated hole; or the first positioning hole and the second positioning hole are both constructed as circular holes, one of the first positioning pin and the second positioning pin is constructed as a circular pin (241), and the other is constructed as a diamond pin.

7. The clamp according to claim 1, wherein: The base (1) comprises a bottom plate (11) supported on a working surface, and two brackets extending upward from the bottom plate (11); the two brackets are configured to be spaced apart on the bottom plate (11), and the clamp body (2) is configured to be rotatably connected between the two brackets.

8. The clamp according to claim 7, characterized in that A through hole is provided on one of the brackets, and the positioning shaft (3) is constructed to be detachably inserted through the through hole and the positioning sleeve (21); the positioning shaft (3) is constructed to be parallel to the rotation axis of the clamp body (2).

9. The clamp according to claim 8, characterized in that The clamp body (2) comprises a first side plate (26) adjacent to the positioning shaft (3), and at least two positioning sleeves (21) are arranged on the first side plate (26); A circle A is defined within the plane of the first side plate (26), the center of the circle A being located on the rotation axis of the clamp body (2), and the radius of the circle A being the distance between the rotation axis of the clamp body (2) and the positioning axis (3); and the centers of the plurality of positioning sleeves (21) are constructed to be distributed on the circle A.

10. The clamp according to claim 1, wherein: The clamp body (2) comprises at least two drilling templates arranged on different surfaces; each drilling template is provided with at least one drill sleeve (22); the drill sleeve is at least one of a fixed drill sleeve and a quick-change drill sleeve.

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