Eccentric shaft grinding clamp

Abstract

The utility model provides an eccentric shaft grinding clamp, which relates to the technical field of shaft part machining and comprises a first positioning unit matched with a first positioning shaft section and a second positioning unit matched with a second positioning shaft section. The first positioning unit comprises a first positioning hole matched with the first positioning shaft section, a second positioning part arranged in the first positioning hole and matched with the first positioning part, and a center hole; according to the eccentric shaft grinding clamp, the first positioning shaft section and the second positioning shaft section are clamped from the two sides of the eccentric shaft section through the first positioning unit and the second positioning unit, so that the eccentric shaft section is coaxial with the first positioning unit and the second positioning unit; the first positioning part and the second positioning part are used for limiting the relative angle when the shaft part is connected with the first positioning unit and the second positioning unit, and it is ensured that the eccentric shaft section is collinear with the axis of the first positioning unit and the axis of the second positioning unit.

Description

Technical Field

[0001] This utility model relates to the field of machining technology for shaft parts, and in particular to an eccentric shaft grinding fixture. Background Technology

[0002] An eccentric shaft is a type of shaft part in which the centerline of a portion of the shaft is offset from the main shaft. Grinding is a precision machining method that uses a high-speed rotating grinding wheel to perform micro-cutting on the surface of a workpiece. It can achieve tolerances of IT5 to IT6; surface roughness Ra values ​​can reach 0.1 to 0.8 μm, and even a mirror finish.

[0003] CN108907901A discloses a precision grinding method for the eccentric circle of a crankshaft and a special eccentric tooling fixture. It also discloses a tooling fixture with an adjustable eccentric shaft position. However, this method cannot meet the precision requirements for shaft parts with high eccentric shaft position tolerance. Utility Model Content

[0004] The main purpose of this invention is to provide an eccentric shaft grinding fixture, which is designed to process eccentric shaft parts with high precision requirements.

[0005] To achieve the above objectives, this utility model proposes an eccentric shaft grinding fixture for grinding shaft-type parts. The shaft-type parts include a first positioning shaft section, an eccentric shaft section, and a second positioning shaft section. The first and second positioning shaft sections are disposed on opposite sides of the eccentric shaft section. The eccentric shaft section is not coaxial with the first and second positioning shaft sections. A first positioning part is provided at the end of the first and second positioning shaft sections away from the eccentric shaft section. The eccentric shaft grinding fixture includes a first positioning unit that cooperates with the first positioning shaft section and a second positioning unit that cooperates with the second positioning shaft section.

[0006] The first positioning unit includes a first positioning hole that mates with a first positioning shaft segment, a second positioning part disposed within the first positioning hole that mates with a first positioning part, and a top hole;

[0007] The second positioning unit includes a second positioning hole (321) that mates with the second positioning shaft segment, a second positioning part that mates with the first positioning part and a center hole disposed in the second positioning hole; the first positioning part and the second positioning part are used to limit the connection of the shaft part, the first positioning unit and the second positioning unit, so that the center holes of the first positioning unit and the second positioning unit are coaxial with the eccentric shaft segment.

[0008] Preferably, the first positioning part is a strip groove arranged radially at the ends of the first positioning shaft segment and the second positioning shaft segment; the second positioning part is a protrusion that matches the shape and position of the strip groove; when the shaft part is rotated to the angle at which the protrusion can be inserted into the strip groove, the top holes of the first positioning unit and the second positioning unit are coaxial with the eccentric shaft segment.

[0009] Preferably, the first positioning part is a strip-shaped protrusion disposed radially at the ends of the first positioning shaft segment and the second positioning shaft segment; the second positioning part is a groove that matches the shape and position of the strip-shaped protrusion; when the shaft part is rotated to an angle at which the strip-shaped protrusion can be inserted into the groove, the top holes of the first positioning unit and the second positioning unit are coaxial with the eccentric shaft segment.

[0010] Preferably, the first positioning unit includes a first positioning body and a first socket body, wherein the end of the first positioning body and the first socket body closer to the eccentric shaft segment is the proximal end, and the end farther from the eccentric shaft segment is the distal end; the proximal end of the first positioning body can fit into the distal end of the first socket body.

[0011] The second positioning part is located at the proximal end of the first positioning body, and the top hole is located at the distal end of the first positioning body; the first socket body is provided with a first positioning hole that can be sleeved on the first positioning shaft segment. After the proximal end of the first positioning body and the distal end of the first socket body are fitted together, the second positioning part is located at the distal end of the first positioning hole.

[0012] Preferably, the proximal end of the first positioning body is provided with a positioning frustum, and the distal end of the first socket body is provided with a positioning hole that matches the positioning frustum. The positioning frustum and the positioning hole are used to keep the first positioning body and the first socket body coaxial when the proximal end of the first positioning body and the distal end of the first socket body are in contact. The positioning frustum and the positioning hole are coaxial with the eccentric shaft segment.

[0013] Preferably, the second positioning unit includes a second positioning body and a second socket body, wherein the end of the second positioning body and the second socket body closer to the eccentric shaft segment is the proximal end, and the end farther from the eccentric shaft segment is the distal end; the proximal end of the second positioning body can fit into the distal end of the second socket body.

[0014] The second positioning part is located at the proximal end of the second positioning body, and the top hole is located at the distal end of the second positioning body; the second socket body is provided with a second positioning hole that can be sleeved on the second positioning shaft segment. After the proximal end of the second positioning body and the distal end of the second socket body are fitted together, the second positioning part is located at the distal end of the second positioning hole.

[0015] Preferably, the proximal end of the second positioning body is provided with a positioning frustum, and the distal end of the second socket body is provided with a positioning hole that matches the positioning frustum. The positioning frustum and the positioning hole are used to keep the second positioning body and the second socket body coaxial when the proximal end of the second positioning body and the distal end of the second socket body are in contact. The positioning frustum and the positioning hole are coaxial with the eccentric shaft segment.

[0016] Preferably, the first and second sockets are provided with set screw holes, and set screws can be installed in the set screw holes. The set screws are used to fix the relative position of the shaft parts with the first and second sockets.

[0017] Preferably, the set screw holes on the first and second sockets are at the same axial angle.

[0018] Preferably, the shaft part further includes a third positioning shaft segment, which is disposed between the first positioning shaft segment and the eccentric shaft segment, and the diameter of the third positioning shaft segment is larger than that of the first positioning shaft segment;

[0019] The proximal end of the first positioning body can fit against the end face of the third positioning shaft segment to determine the radial clamping position of the shaft part.

[0020] The technical solution of this utility model uses a first positioning unit and a second positioning unit to clamp the first positioning shaft segment and the second positioning shaft segment from both sides, so that the eccentric shaft segment is coaxial with the first positioning unit and the second positioning unit. Then, the eccentric shaft part is connected to the grinding machine by connecting the center of the first positioning unit and the center hole of the second positioning unit through the center of the grinding machine. The first positioning part and the second positioning part are used to limit the relative angle between the shaft part and the first positioning unit and the second positioning unit when connected, so as to ensure that the axis of the eccentric shaft segment is collinear with the axis of the first positioning unit and the second positioning unit. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 An exploded view of an eccentric shaft grinding fixture provided by this utility model;

[0023] Figure 2 A schematic diagram of a shaft part for an eccentric shaft grinding fixture provided by this utility model;

[0024] Figure 3 A cross-sectional view of the first positioning unit of an eccentric shaft grinding fixture provided by this utility model;

[0025] Figure 4 A cross-sectional view of the second positioning unit of an eccentric shaft grinding fixture provided by this utility model;

[0026] Figure 5 A diagram illustrating the usage state of an eccentric shaft grinding fixture provided by this utility model;

[0027] Figure 6 A schematic diagram of the first positioning body and the first connecting body of an eccentric shaft grinding fixture provided by this utility model;

[0028] Figure 7 A schematic diagram of the second positioning body and the second connecting body of an eccentric shaft grinding fixture provided by this utility model;

[0029] Explanation of icon numbers:

[0030] First positioning shaft segment 11, second positioning shaft segment 12, eccentric shaft segment 13, third positioning shaft segment 14, first positioning part 15, first positioning body 21, second positioning part 211, second positioning body 22, first socket body 31, first positioning hole 311, second socket body 32, second positioning hole 321, through hole 41, internal thread hole 42, positioning frustum 43, positioning round hole 44, center hole 45, set screw hole 46.

[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0033] It should be noted that if any directional indication (such as up, down, left, right, front, back, etc.) is involved in the embodiments of this utility model, such directional indication is only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] The installation dimensions or port specifications of the servo valve may not match the actuator or system piping. The adapter block enables the connection between different components through customized internal flow channels and interface design.

[0036] The existing hydraulic testing process lacks safety protection measures. High-pressure oil may leak due to damage to the servo valve or disassembly before depressurization, posing a safety hazard.

[0037] This utility model proposes a hydraulic adapter block with safety protection function.

[0038] Please combine Figure 1 , Figure 2 In one embodiment of this utility model, an eccentric shaft grinding fixture is proposed, which is intended to process eccentric shaft parts with high precision requirements.

[0039] To achieve the above objectives, this utility model proposes an eccentric shaft grinding fixture for grinding shaft-type parts. The shaft-type parts include a first positioning shaft section 11, an eccentric shaft section 13, and a second positioning shaft section 12. The first positioning shaft section 11 and the second positioning shaft section 12 are disposed on opposite sides of the eccentric shaft section 13. The eccentric shaft section 13 is not coaxial with the first positioning shaft section 11 and the second positioning shaft section 12. A first positioning part 15 is provided at the end of the first positioning shaft section 11 and the second positioning shaft section 12 away from the eccentric shaft section 13. The eccentric shaft grinding fixture includes a first positioning unit that cooperates with the first positioning shaft section 11 and a second positioning unit that cooperates with the second positioning shaft section 12.

[0040] The first positioning unit includes a first positioning hole 311 that mates with the first positioning shaft segment 11, a second positioning part 211 disposed in the first positioning hole 311 that mates with the first positioning part 15, and a top hole 45;

[0041] The second positioning unit includes a second positioning hole 321 that mates with the second positioning shaft section 12, a second positioning part 211 that mates with the first positioning part 15 and is disposed in the second positioning hole 321; and a top hole 45. The first positioning part 15 and the second positioning part 211 are used to restrict the shaft part, the first positioning unit and the second positioning unit to be connected, and the top hole 45 of the first positioning unit and the second positioning unit to be coaxial with the eccentric shaft section 13.

[0042] In this embodiment, an eccentric shaft grinding fixture is used to process specific shaft-type parts. The shaft-type parts include a first positioning shaft segment 11, an eccentric shaft segment 13, and a second positioning shaft segment 12, which are interconnected. The first positioning shaft segment 11, the eccentric shaft segment 13, and the second positioning shaft segment 12 are a single unit, and the axis of the eccentric shaft segment 13 is not collinear with the axes of the first positioning shaft segment 11 and the second positioning shaft segment 12. In this embodiment, the axes of the first positioning shaft segment 11 and the second positioning shaft segment 12 are collinear.

[0043] In this embodiment, the eccentricity of the eccentric shaft segment 13 is consistent with the eccentricity of the first positioning unit and the second positioning unit.

[0044] The first and second positioning units are rotary parts with a cylindrical outer contour.

[0045] In the specific implementation process, the first positioning shaft segment 11 can be inserted into the first positioning hole 311, and the second positioning shaft segment 12 can be inserted into the second positioning hole 321. The first positioning unit and the second positioning unit are installed on both sides of the eccentric shaft segment 13, and the axis of the eccentric shaft segment 13 is collinear with the axes of the first positioning unit and the second positioning unit. The center hole 45 of the first positioning unit and the second positioning unit is at the center of the first positioning unit and the second positioning unit.

[0046] After installation as described above, the shaft-like parts can rotate around the axis of the eccentric shaft segment 13. The first positioning part 15 and the second positioning part 211 are used to limit the rotation of the shaft-like parts. The first positioning part 15 and the second positioning part 211 can be structures capable of preventing rotation.

[0047] In the specific implementation process, the first positioning shaft segment 11 and the second positioning shaft segment 12 are clamped from both sides of the eccentric shaft segment 13 by the first positioning unit and the second positioning unit, so that the eccentric shaft segment 13 is coaxial with the first positioning unit and the second positioning unit. Then, the eccentric shaft part is connected to the grinding machine by the center of the grinding machine and the center hole 45 of the first positioning unit. The first positioning part 15 and the second positioning part 211 are used to limit the relative angle between the shaft part and the first positioning unit and the second positioning unit when they are connected, so as to ensure that the axis of the eccentric shaft segment 13 is collinear with the axis of the first positioning unit and the second positioning unit.

[0048] Furthermore, the first positioning part 15 is a strip-shaped groove arranged radially at the ends of the first positioning shaft section 11 and the second positioning shaft section 12; the second positioning part 211 is a protrusion that matches the shape and position of the strip-shaped groove; when the shaft part is rotated to the angle at which the protrusion can be inserted into the strip-shaped groove, the top hole 45 of the first positioning unit and the second positioning unit is coaxial with the eccentric shaft section 13.

[0049] This embodiment proposes an anti-rotation structure. The first positioning part 15 is a strip-shaped groove arranged radially at the ends of the first positioning shaft section 11 and the second positioning shaft section 12. The size of the strip-shaped groove can be set according to the size of the first positioning shaft section 11 and the second positioning shaft section 12. The size of the strip-shaped groove of the first positioning shaft section 11 and the second positioning shaft section 12 can be the same or different.

[0050] The second positioning part 211 is a strip-shaped protrusion that matches the shape and position of the strip groove. When the shaft part is rotated to an angle where the protrusion can be inserted into the strip groove, the center holes 45 of the first positioning unit and the second positioning unit are coaxial with the eccentric shaft section 13. The first positioning part 15 can only be connected to the second positioning part 211 when the length directions of the strip groove and the strip-shaped protrusion are parallel to each other.

[0051] Furthermore, the first positioning part 15 is a strip-shaped protrusion arranged radially at the ends of the first positioning shaft section 11 and the second positioning shaft section 12; the second positioning part 211 is a groove that matches the shape and position of the strip-shaped protrusion; when the shaft part is rotated to an angle where the strip-shaped protrusion can be inserted into the groove, the top hole 45 of the first positioning unit and the second positioning unit is coaxial with the eccentric shaft section 13.

[0052] This embodiment provides another anti-rotation structure, which differs from the aforementioned anti-rotation structure in that: the strip protrusions are provided at both ends of the shaft-like part, and the grooves are provided on the first positioning unit and the second positioning unit.

[0053] Furthermore, the first positioning unit includes a first positioning body 21 and a first socket body 31. The first positioning body 21 and the first socket body 31 are located near the eccentric shaft segment 13 as the proximal end and away from the eccentric shaft segment 13 as the distal end. The proximal end of the first positioning body 21 can fit into the distal end of the first socket body 31.

[0054] The second positioning part 211 is disposed at the proximal end of the first positioning body 21, and the top hole 45 is disposed at the distal end of the first positioning body 21; the first socket 31 is provided with a first positioning hole 311 that can be sleeved on the first positioning shaft segment 11. After the proximal end of the first positioning body 21 is attached to the distal end of the first socket 31, the second positioning part 211 is at the distal end of the first positioning hole 311.

[0055] In this embodiment, the first positioning unit includes two independent first positioning bodies 21 and first socket bodies 31. The outer contours of the first positioning bodies 21 and the first socket bodies 31 are cylindrical rotating parts. The first positioning unit is split into the first positioning bodies 21 and the first socket bodies 31 mainly for easier processing.

[0056] After the first positioning body 21 and the first socket body 31 are processed, they can be connected by fasteners and do not need to be disassembled during subsequent use.

[0057] Specifically, the first positioning body 21 has multiple through holes 41 at its proximal end, and the first socket 31 has an internal threaded hole 42 at the corresponding position at its proximal end. The first positioning body 21 and the first socket 31 are connected by bolts.

[0058] like Figure 6 As shown, the first positioning hole 311 penetrates the first socket 31, and the second positioning part 211 is disposed at the proximal end of the first positioning body 21. After the proximal end of the first positioning body 21 is attached to the distal end of the first socket 31, the second positioning part 211 is at the distal end of the first positioning hole 311.

[0059] In this embodiment, the second positioning part 211 cannot be inserted into the first positioning hole 311. Therefore, a clearance hole is provided at the far end of the first socket 31, a part of the second positioning part 211 is in the clearance hole, and the other part of the second positioning part 211 is in the socket hole.

[0060] Furthermore, a positioning frustum 43 is provided at the proximal end of the first positioning body 21, and a positioning hole 44 matching the positioning frustum 43 is provided at the distal end of the first socket 31. The positioning frustum 43 and the positioning hole 44 are used to keep the first positioning body 21 and the first socket 31 coaxial when the proximal end of the first positioning body 21 and the distal end of the first socket 31 are in contact. The positioning frustum 43 and the positioning hole 44 are coaxial with the eccentric shaft segment 13.

[0061] In this embodiment, the positioning frustum 43 and the positioning hole 44 are used to ensure the coaxiality of the connection between the first positioning body 21 and the first socket body 31. The second positioning part 211 can be disposed on the positioning frustum 43. The aforementioned clearance hole can be the positioning hole 44, but if the positioning hole 44 coincides with a part of the socket hole, at least 50% of the contour of the positioning hole 44 should not coincide with the socket hole. Otherwise, the positioning hole 44 cannot play a positioning role, and the positioning frustum 43 will be displaced in the space between the positioning hole 44 and the socket hole, thus losing its positioning function.

[0062] Furthermore, the second positioning unit includes a second positioning body 22 and a second socket body 32. The end of the second positioning body 22 and the second socket body 32 that is closer to the eccentric shaft segment 13 is the proximal end, and the end that is farther away from the eccentric shaft segment 13 is the distal end. The proximal end of the second positioning body 22 can fit into the distal end of the second socket body 32.

[0063] The second positioning part 211 is disposed at the proximal end of the second positioning body 22, and the top hole 45 is disposed at the distal end of the second positioning body 22; the second socket 32 ​​is provided with a second positioning hole 321 that can be sleeved on the second positioning shaft segment 12. After the proximal end of the second positioning body 22 and the distal end of the second socket 32 ​​are attached, the second positioning part 211 is at the distal end of the second positioning hole 321.

[0064] In this embodiment, the second positioning unit includes two independent second positioning bodies 22 and a second socket body 32. The outer contours of the second positioning bodies 22 and the second socket body 32 are cylindrical rotating parts. The second positioning unit is split into the second positioning bodies 22 and the second socket body 32 primarily for easier manufacturing.

[0065] After the second positioning body 22 and the second socket 32 ​​are manufactured, they can be connected by fasteners and do not need to be disassembled during subsequent use. Specifically, the proximal end of the second positioning body 22 is provided with multiple through holes 41, and the proximal end of the second socket 32 ​​is provided with internal threaded holes 42 at corresponding positions. The second positioning body 22 and the second socket 32 ​​are connected by bolts.

[0066] like Figure 4 , Figure 7 As shown, the second positioning hole 321 penetrates the second socket 32, and the second positioning part 211 is disposed at the proximal end of the second positioning body 22. After the proximal end of the second positioning body 22 is attached to the distal end of the second socket 32, the second positioning part 211 is at the distal end of the second positioning hole 321.

[0067] In this embodiment, the second positioning part 211 cannot be inserted into the first positioning hole 311. Therefore, a clearance hole is provided at the far end of the first socket 31, a part of the second positioning part 211 is in the clearance hole, and the other part of the second positioning part 211 is in the socket hole.

[0068] Furthermore, a positioning frustum 43 is provided at the proximal end of the second positioning body 22, and a positioning hole 44 matching the positioning frustum 43 is provided at the distal end of the second socket 32. The positioning frustum 43 and the positioning hole 44 are used to keep the second positioning body 22 and the second socket 32 ​​coaxial when the proximal end of the second positioning body 22 and the distal end of the second socket 32 ​​are in contact. The positioning frustum 43 and the positioning hole 44 are coaxial with the eccentric shaft segment 13.

[0069] In this embodiment, as Figure 4As shown, the positioning frustum 43 and the positioning hole 44 are used to ensure the coaxiality of the connection between the second positioning body 22 and the second socket body 32. The second positioning part 211 can be provided on the positioning frustum 43. The aforementioned clearance hole can be the positioning hole 44. In this embodiment, the diameter of the clearance hole is larger than the diameter of the socket hole, and the positioning hole 44 can be used as the clearance hole.

[0070] Furthermore, the first socket 31 and the second socket 32 ​​are provided with set screw holes 46, and set screws can be installed in the set screw holes 46. The set screws are used to fix the relative position of the shaft parts with the first socket 31 and the second socket 32.

[0071] In this embodiment, as Figure 1 As shown, the set screw hole 46 is an internally threaded hole 42 that passes through the first socket 31 and the second socket 32, and the set screw has a matching external thread. The set screw can press the shaft part from the side of the first socket 31 and the second socket 32, thus playing the role of fixing the relative position of the shaft part with the first socket 31 and the second socket 32.

[0072] Furthermore, the set screw holes 46 on the first socket 31 and the second socket 32 ​​are at the same angle in the axial direction.

[0073] The two set screw holes 46 on the first and second coupling bodies 31 and 32 have the same axial angle to prevent misalignment. When the aforementioned anti-rotation structure is a slotted groove, the first or second positioning unit can still be inserted into the shaft-like part after rotating 180 degrees. However, this 180-degree rotation causes the first or second positioning unit to be misaligned with the eccentric shaft section 13. Furthermore, the angles of the two set screw holes 46 are inconsistent. Therefore, the consistency of the axial angles of the two set screw holes 46 serves to prevent misalignment.

[0074] Furthermore, the shaft part also includes a third positioning shaft section 14, which is disposed between the first positioning shaft section 11 and the eccentric shaft section 13, and the diameter of the third positioning shaft section 14 is larger than that of the first positioning shaft section 11;

[0075] The proximal end of the first positioning body 21 can fit against the end face of the third positioning shaft segment 14 to determine the radial clamping position of the shaft part.

[0076] In this embodiment, the contact between one side of the first positioning body 21 and the end face of the third positioning shaft segment 14 can make the shaft parts and the axial relative position of the first positioning body 21 consistent, thus enabling batch processing.

[0077] It should be understood that the terms "one embodiment" or "one example" throughout the specification mean that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in one example" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also recognize that the embodiments described in the specification are optional embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0078] In various embodiments of this utility model, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of this utility model embodiment.

[0079] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, or they may sometimes be executed in reverse order, depending on the functions involved. It is particularly important to note that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0080] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An eccentric shaft grinding fixture for grinding shaft parts, the shaft parts comprising a first positioning shaft section (11), an eccentric shaft section (13), and a second positioning shaft section (12); the first positioning shaft section (11) and the second positioning shaft section (12) are disposed on both sides of the eccentric shaft section (13); the eccentric shaft section (13) is not coaxial with the first positioning shaft section (11) and the second positioning shaft section (12); a first positioning part (15) is provided at the end of the first positioning shaft section (11) and the second positioning shaft section (12) away from the eccentric shaft section (13); characterized in that: The eccentric shaft grinding fixture includes a first positioning unit that mates with the first positioning shaft section (11) and a second positioning unit that mates with the second positioning shaft section (12); The first positioning unit includes a first positioning hole (311) that mates with the first positioning shaft segment (11), a second positioning part (211) that mates with the first positioning part (15) disposed in the first positioning hole (311), and a top hole (45). The second positioning unit includes a second positioning hole (321) that mates with the second positioning shaft segment (12), a second positioning part (211) that mates with the first positioning part (15) and a top hole (45) disposed in the second positioning hole (321); the first positioning part (15) and the second positioning part (211) are used to restrict the shaft part, the first positioning unit and the second positioning unit to be connected, and the top hole (45) of the first positioning unit and the second positioning unit is coaxial with the eccentric shaft segment (13).

2. The eccentric shaft grinding fixture as described in claim 1, characterized in that: The first positioning part (15) is a strip groove arranged radially at the ends of the first positioning shaft section (11) and the second positioning shaft section (12); the second positioning part (211) is a protrusion that matches the shape and position of the strip groove; when the shaft part is rotated to the angle at which the protrusion can be inserted into the strip groove, the top hole (45) of the first positioning unit and the second positioning unit is coaxial with the eccentric shaft section (13).

3. The eccentric shaft grinding fixture as described in claim 1, characterized in that: The first positioning part (15) is a strip-shaped protrusion disposed radially at the ends of the first positioning shaft section (11) and the second positioning shaft section (12); the second positioning part (211) is a groove that matches the shape and position of the strip-shaped protrusion. When the shaft part is rotated to an angle at which the strip protrusion can be inserted into the groove, the top hole (45) of the first positioning unit and the second positioning unit are coaxial with the eccentric shaft section (13).

4. An eccentric shaft grinding fixture as described in claim 2 or 3, characterized in that: The first positioning unit includes a first positioning body (21) and a first socket (31). The first positioning body (21) and the first socket (31) are located near the eccentric shaft segment (13) as the proximal end and away from the eccentric shaft segment (13) as the distal end. The proximal end of the first positioning body (21) can fit into the distal end of the first socket (31). The second positioning part (211) is located at the proximal end of the first positioning body (21), and the top hole (45) is located at the distal end of the first positioning body (21). The first socket (31) is provided with a first positioning hole (311) that can be sleeved on the first positioning shaft segment (11). After the proximal end of the first positioning body (21) is attached to the distal end of the first socket (31), the second positioning part (211) is located at the distal end of the first positioning hole (311).

5. The eccentric shaft grinding fixture as described in claim 4, characterized in that: The first positioning body (21) is provided with a positioning frustum (43) at its proximal end, and the first socket (31) is provided with a positioning hole (44) that matches the positioning frustum (43) at its distal end. The positioning frustum (43) and the positioning hole (44) are used to keep the first positioning body (21) and the first socket (31) coaxial when the proximal end of the first positioning body (21) and the distal end of the first socket (31) are in contact. The positioning frustum (43) and the positioning hole (44) are coaxial with the eccentric shaft segment (13).

6. The eccentric shaft grinding fixture as described in claim 4, characterized in that: The second positioning unit includes a second positioning body (22) and a second socket (32). The end of the second positioning body (22) and the second socket (32) closer to the eccentric shaft segment (13) is the proximal end, and the end farther from the eccentric shaft segment (13) is the distal end. The proximal end of the second positioning body (22) can fit into the distal end of the second socket (32). The second positioning part (211) is located at the proximal end of the second positioning body (22), and the top hole (45) is located at the distal end of the second positioning body (22). The second socket (32) is provided with a second positioning hole (321) that can be sleeved on the second positioning shaft segment (12). After the proximal end of the second positioning body (22) is attached to the distal end of the second socket (32), the second positioning part (211) is located at the distal end of the second positioning hole (321).

7. The eccentric shaft grinding fixture as described in claim 6, characterized in that: The second positioning body (22) is provided with a positioning frustum (43) at its proximal end, and the second socket (32) is provided with a positioning hole (44) that matches the positioning frustum (43) at its distal end. The positioning frustum (43) and the positioning hole (44) are used to keep the second positioning body (22) and the second socket (32) coaxial when the proximal end of the second positioning body (22) and the distal end of the second socket (32) are in contact. The positioning frustum (43) and the positioning hole (44) are coaxial with the eccentric shaft segment (13).

8. The eccentric shaft grinding fixture as described in claim 6, characterized in that: The first socket (31) and the second socket (32) are provided with set screw holes (46), and set screws can be installed in the set screw holes (46). The set screws are used to fix the relative position of the shaft parts with the first socket (31) and the second socket (32).

9. The eccentric shaft grinding fixture as described in claim 8, characterized in that: The set screw holes (46) on the first socket (31) and the second socket (32) are at the same angle in the axial direction.

10. An eccentric shaft grinding fixture as described in claim 6, characterized in that: The shaft part also includes a third positioning shaft section (14), which is located between the first positioning shaft section (11) and the eccentric shaft section (13), and the diameter of the third positioning shaft section (14) is larger than that of the first positioning shaft section (11). The proximal end of the first positioning body (21) can fit against the end face of the third positioning shaft segment (14) to determine the radial clamping position of the shaft part.

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