Crankshaft machining positioning mechanism
By designing the crankshaft machining and positioning mechanism, the angular positioning of the crankshaft is achieved by using the positioning inclined surface and angular positioning block, the problem of difficult control of crankshaft oil circuit processing accuracy and angular error is solved, and the processing efficiency and quality are improved.
Patent Information
- Application Number
- CN202420943371.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-04-30
AI Technical Summary
During the processing of the crankshaft of the scroll compressor, as the crankshaft mating section is changed from a rolling bearing to a sliding bearing, the width of the crankshaft radial oil path increases, resulting in large jumps when grinding on a centerless grinder, making it difficult to ensure the processing accuracy and control of the crankshaft oil path.
A crankshaft processing positioning mechanism is designed, including a positioning base, an angular positioning mechanism and a crankshaft pressing mechanism. By setting an angular positioning block that fits the positioning inclined surface and the reference positioning plane, the angular positioning of the crankshaft is realized, and the positioning accuracy is improved through the elastic mechanism and the positioning pin.
This positioning mechanism can improve the processing efficiency and accuracy of the crankshaft, reduce angular errors, improve processing quality, and is suitable for crankshaft processing of different specifications.
Smart Images
Figure CN222779171U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of crankshaft processing, in particular to a crankshaft processing positioning mechanism. Background Art
[0002] In the modern industrial field, many mechanical parts use crankshafts. For example, the scroll compressor widely used in the refrigeration industry is an important component of the scroll compressor. Its function is to convert the reciprocating motion of the piston into scroll motion to achieve gas compression and transportation. Therefore, the machining accuracy of the crankshaft has a great influence on the performance of the scroll compressor, which will directly affect the efficiency and stability of the compressor.
[0003] In terms of the processing of the scroll compressor crankshaft, the original processing technology generally first processed the crankshaft oil circuit and then ground the crankshaft outer circle. However, with the urgent need to reduce noise and cost of the scroll compressor, the crankshaft mating section was changed from a rolling bearing to a sliding bearing, resulting in an increase in the width of the crankshaft radial oil circuit. The runout was large when grinding on a centerless grinder, reaching 0.01mm. Therefore, it was necessary to change the processing technology to first grind the crankshaft outer circle and then process the crankshaft oil circuit. The new problem brought about by this processing technology change is that it is more difficult to position the outer circle surface after grinding the crankshaft outer circle first, which makes it difficult to ensure the accuracy of the crankshaft oil circuit processing, and the angular error of the crankshaft oil circuit processing is large.
[0004] by Figure 1 , Figure 2 Taking the crankshaft structure shown as an example, the crankshaft 1 includes an eccentric circular shaft section 11, a shoulder shaft section 12, a main journal shaft section 13, a balance journal shaft section 14, a rotor journal shaft section 15, a secondary journal shaft section 16 and a pump journal shaft section 17, wherein the eccentric circular shaft section 11, the main journal shaft section 13 and the secondary journal shaft section 16 are respectively provided with an eccentric circular radial oil circuit, a main journal radial oil circuit and a secondary journal radial oil circuit. After the outer circle grinding of the crankshaft 1 is completed, the eccentric circular radial oil circuit, the main journal radial oil circuit and the secondary journal radial oil circuit form an oil road surface parallel to the axis on the outer circle of the crankshaft 1, which correspond to the eccentric circular radial oil road surface 111, the main journal radial oil road surface 131 and the secondary journal radial oil road surface 161 respectively. At this time, the radial oil circuit of the crankshaft 1 needs to be processed, such as Figure 3 As shown in the figure, the AA direction is the direction of the eccentric radial oil circuit, and the BB direction is the direction of the main journal radial oil circuit. If the eccentric radial oil circuit is taken as a reference, and if the design requirement for the angle between the main journal radial oil circuit and the eccentric radial oil circuit is α, then the difference between the actual value of the angle between the main journal radial oil circuit and the eccentric radial oil circuit of the crankshaft 1 finally produced and α is the angular error.
[0005] The commonly used crankshaft machining positioning mechanism, such as Figure 4As shown, eccentric outer circle positioning is generally adopted, and the eccentric outer circle is manually pressed against the limit column, which belongs to rigid positioning. On the one hand, the angular error of the processed is large, reaching ±2°. On the other hand, manual loading is difficult to operate and easy to get stuck. It requires extremely high skills for manual loading, which is not conducive to the control of processing quality consistency. At the same time, it is easy to damage the crankshaft, affecting the quality of crankshaft production. Utility Model Content
[0006] The utility model provides a crankshaft machining positioning mechanism, which can improve the machining efficiency and machining accuracy of the crankshaft and enhance the machining quality. The specific technical solution is as follows:
[0007] A crankshaft machining positioning mechanism is used for angular positioning of crankshaft machining, wherein the crankshaft is provided with a reference positioning plane along the axial direction, comprising a positioning base, an angular positioning mechanism and a crankshaft clamping mechanism; the positioning base is provided with a support block, the support block can lift the crankshaft so that the crankshaft axis is parallel to the bottom plane of the positioning base; the angular positioning mechanism comprises an angular positioning block provided with a positioning inclined surface that fits the reference positioning plane; the crankshaft clamping mechanism can press the crankshaft onto the positioning base.
[0008] Furthermore, the angle between the positioning inclined surface and the bottom plane of the positioning base is the positioning angle; when the working plane to be processed is along the axial direction, the angle between the working plane and the reference positioning plane is equal to the positioning angle; or, when the working plane to be processed is along the radial direction, the angle between the vertical plane of the working plane and the reference positioning plane is equal to the positioning angle.
[0009] Furthermore, when there is a plane along the axial direction that has been machined on the crankshaft, the plane can be used as a reference positioning plane.
[0010] Furthermore, the inclination of the positioning inclined surface is adjustable.
[0011] Furthermore, the support blocks are at least two V-shaped blocks, and the at least two V-shaped blocks can hold up the crankshaft in a close fit on both sides so that the axis of the crankshaft is parallel to the bottom plane of the positioning base.
[0012] Furthermore, the angular positioning mechanism is also provided with an elastic mechanism, and the elastic mechanism is located between the angular positioning block and the positioning base, so that the angular positioning block can move up and down.
[0013] Furthermore, the angular positioning mechanism is also provided with two positioning pins, and the two positioning pins are respectively located on both sides of the crankshaft; the elastic mechanism is two springs whose inner diameters are adapted to the positioning pins, and the two springs are respectively sleeved on the roots of the two positioning pins; positioning holes adapted to the positioning pins are respectively provided on both sides of the angular positioning block, so that the angular positioning block can be mounted on the two springs through the positioning pins.
[0014] Furthermore, the clamping mechanism is a pressing block located above the intermediate shaft section of the crankshaft.
[0015] Furthermore, a rotating mechanism is included, and the rotating mechanism can make the crankshaft move circumferentially on the support block.
[0016] Furthermore, it also includes a position detection mechanism, which can detect the fit between the reference positioning plane and the positioning inclined surface.
[0017] The crankshaft processing positioning mechanism provided by the utility model comprises a positioning base, an angular positioning mechanism and a crankshaft clamping mechanism. The positioning base is provided with a support block, and the support block can lift the crankshaft so that the crankshaft axis is parallel to the bottom plane of the positioning base. The angular positioning mechanism comprises an angular positioning block provided with a positioning inclined surface which is in contact with the reference positioning plane. The crankshaft clamping mechanism can press the crankshaft onto the positioning base to realize the angular positioning of the crankshaft. The mechanism is simple to discharge materials, can improve the machining efficiency of the crankshaft, has a better positioning effect on the crankshaft, has a higher angular positioning accuracy, and can improve the machining quality of the crankshaft.
[0018] Furthermore, the angle between the positioning inclined surface and the bottom plane of the positioning base is the positioning angle; when the working plane to be processed is along the axial direction, the angle between the working plane and the reference positioning plane is equal to the positioning angle; or, when the working plane to be processed is along the radial direction, the angle between the vertical plane of the working plane and the reference positioning plane is equal to the positioning angle, so that the required processing position can be located directly above the crankshaft, which can be processed more conveniently and stably, with higher processing reliability and better quality.
[0019] Furthermore, the inclination of the positioning inclined surface is adjustable, and can be suitable for processing crankshafts of different specifications, which can greatly improve the versatility of the crankshaft processing positioning mechanism.
[0020] Furthermore, the angular positioning mechanism is also provided with an elastic mechanism and a positioning pin, which can further improve the angular positioning accuracy and enhance the processing quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 Right side view of the crankshaft.
[0022] Figure 2 Top view of the crankshaft.
[0023] Figure 3 This is a schematic diagram of the angular positioning of the crankshaft radial oil circuit.
[0024] Figure 4 It is a schematic diagram of the structure of a crankshaft machining positioning mechanism in the prior art in the background technology.
[0025] Figure 5 Schematic diagram of the crankshaft machining positioning mechanism provided by the utility model Figure 1 .
[0026] Figure 6 This is a schematic diagram of the V-block structure provided by the utility model.
[0027] Figure 7 Schematic diagram of the crankshaft machining positioning mechanism provided by the utility model Figure 2 .
[0028] Figure 8 Schematic diagram of the crankshaft machining positioning mechanism provided by the utility model Figure 3 .
[0029] Fig. 9 This is a schematic diagram of the angular positioning block structure provided by the utility model.
[0030] Fig.10 Schematic diagram of the crankshaft machining positioning mechanism provided by the utility model in use Figure 1 .
[0031] Fig.11 Schematic diagram of the crankshaft machining positioning mechanism provided by the utility model in use Figure 2 .
[0032] Fig.12 Schematic diagram of the angular positioning of the crankshaft axial oil groove.
[0033] The accompanying drawings are marked as follows: 1 is a crankshaft, 11 is an eccentric circular shaft section, 111 is an eccentric circular radial oil road surface, AA is the eccentric circular radial oil circuit direction, 12 is a shoulder shaft section, 13 is a main shaft neck shaft section, 131 is a main shaft neck radial oil road surface, BB is the main shaft neck radial oil circuit direction, 14 is a balance shaft neck shaft section, 15 is a rotor shaft neck shaft section, 16 is a secondary shaft neck shaft section, 161 is a secondary shaft neck radial oil road surface, 17 is a pump shaft neck shaft section, 18 is an axial oil groove, 2 is a positioning base, 3 is a support block, 31 is a V-shaped block, 4 is an angular positioning mechanism, 41 is an angular positioning block, 411 is a positioning ramp, 412 is a positioning hole, 42 is an elastic mechanism, 421 is a spring, and 43 is a positioning pin. DETAILED DESCRIPTION
[0034] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. For the convenience of description, the directions or positional relationships indicated by the terms "front", "rear", "front", "reverse", "left", "right", "top", "bottom", "up", "down", "inside", "outside", "inside", etc. in the present invention are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as restrictions on the present invention and the actual directions of the product or device during production, use, sales, etc. In addition, in the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", "fixation", "composition" and the like should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0035] First embodiment
[0036] The utility model provides a crankshaft machining positioning mechanism, which can be used for angular positioning of crankshaft 1 machining. Figure 1 , Figure 2 Take the crankshaft 1 shown as an example, the crankshaft 1 includes an eccentric circular shaft section 11, a shoulder shaft section 12, a main journal shaft section 13, a balance journal shaft section 14, a rotor journal shaft section 15, a secondary journal shaft section 16 and a pump journal shaft section 17, wherein the eccentric circular shaft section 11, the main journal shaft section 13, and the secondary journal shaft section 16 are respectively provided with an eccentric circular radial oil circuit, a main journal radial oil circuit, and a secondary journal radial oil circuit (in actual application, the crankshaft 1 can be composed of other shaft sections, and the radial oil circuit can also be provided in any shaft section according to actual needs). After the outer circle grinding of the crankshaft 1 is completed, it is first necessary to form a radial oil circuit oil road surface parallel to the axis line on the outer circle of the crankshaft 1 corresponding to the required processing; then, the radial oil circuit of the crankshaft 1 is processed; and finally a radial oil circuit is formed, such as the eccentric circular radial oil circuit, the main journal radial oil circuit, and the secondary journal radial oil circuit corresponding to the present embodiment. It should be noted that this embodiment only introduces the implementation method of radial processing by taking the radial oil circuit as an example, but the protection scope is not limited to the processing of the radial oil circuit, and other radial processing is also applicable.
[0037] The crankshaft 1 is provided with an axial reference positioning plane, which is perpendicular to the diameter of the crankshaft 1. The reference positioning plane can be an axial plane provided on the crankshaft 1, or can be a plane existing on the crankshaft 1 and formed along the axial direction, such as one of the eccentric radial oil road surface 111, the main journal radial oil road surface 131, and the secondary journal radial oil road surface 161 in this embodiment. In this embodiment, the reference positioning plane is the eccentric radial oil road surface 111; the crankshaft processing positioning mechanism It includes a positioning base 2, an angular positioning mechanism 4 and a crankshaft clamping mechanism; a support block 3 is provided on the positioning base 2, and the support block 3 can lift the crankshaft 1 so that the axis of the crankshaft 1 is parallel to the bottom plane of the positioning base 2; the angular positioning mechanism 4 includes an angular positioning block 41, and the angular positioning block 41 is provided with a positioning inclined surface 411 that is in contact with the reference positioning plane; the crankshaft clamping mechanism can press the crankshaft 1 onto the positioning base 2; the position of the angular positioning block 41 can be adaptively adjusted according to the selected reference plane.
[0038] When in use, the crankshaft 1 is placed on the support block 3, and the position of the crankshaft 1 is adjusted so that the reference positioning plane of the crankshaft 1 fits the positioning inclined surface 411, and then the crankshaft 1 is clamped by a clamping mechanism, and then the radial oil circuit of the crankshaft 1 is processed at the corresponding position of the crankshaft 1 using a machining tool.
[0039] The crankshaft machining positioning mechanism with the above structure is used to stably lift the crankshaft 1 through the support block 3, so that the axis of the crankshaft 1 is parallel to the bottom plane of the positioning base 2, so that the crankshaft 1 is in a flat state; by providing the angular positioning block 41, and providing a positioning inclined surface 411 on the upper surface of the angular positioning block 41, the reference positioning plane of the crankshaft 1 is affixed to the positioning inclined surface 411, and then the crankshaft 1 is pressed by the clamping mechanism, so that the angular positioning of the crankshaft 1 can be achieved; finally, by analyzing the angular relationship between the working plane of the radial oil circuit to be processed (in the utility model, the working plane of the radial oil circuit refers to the plane along the required processing direction, for example, processing the radial oil circuit, that is, the plane passing through the axis of the oil circuit or parallel to the axis of the oil circuit along the radial oil circuit direction) and the reference positioning plane, the position and direction of the machining tool can be determined, and then the machining tool is used to process the crankshaft 1 at the corresponding position of the crankshaft 1. The crankshaft machining positioning mechanism provided by the utility model has simple material discharge, can improve the machining efficiency of the crankshaft 1, and has a better positioning effect on the crankshaft 1, and has a higher angular positioning accuracy, which can improve the machining quality of the crankshaft 1.
[0040] In some embodiments, the angle between the positioning inclined surface 411 and the bottom plane of the positioning base 2 is the positioning angle, the working plane of the radial oil path to be processed is along the radial direction, and the angle between the vertical plane of the working plane and the reference positioning plane is equal to the positioning angle. Figure 3 As shown, the eccentric radial oil road surface 111 is used as the reference positioning plane to machine the main journal radial oil circuit. In the figure, direction AA is the direction of the eccentric radial oil circuit, and direction BB is the direction of the main journal radial oil circuit. If the design requirement for the angle between the main journal radial oil circuit and the eccentric radial oil circuit is α, then the angle between the positioning bevel 411 and the bottom plane of the positioning base 2 is 180°-α, and the angle between the vertical plane of the working plane of the main journal radial oil circuit and the reference positioning plane is also 180°-α.
[0041] By adopting the crankshaft machining positioning mechanism of the above structure, by setting the angle between the positioning bevel 411 and the bottom plane of the positioning base 2 to be equal to the angle between the vertical plane of the radial oil circuit working plane and the reference positioning plane, the oil road surface of the radial oil circuit to be machined can be located directly above the crankshaft 1, which can make machining more convenient and stable, with higher machining reliability and better quality.
[0042] In some embodiments, the inclination of the positioning bevel 411 is adjustable. There are multiple implementations for adjusting the inclination of the positioning bevel 411 described above. For example, the angular positioning block 41 is detachably mounted on the positioning base 2 by means of a buckle, a slide groove, etc. When in use, the angular positioning block 41 with a positioning bevel 411 of different inclinations can be replaced according to the design requirements of the angle between the reference positioning plane of the crankshaft 1 and the working plane to be processed, so that the position of the crankshaft 1 to be processed is located at the position corresponding to the processing tool; or, one side of the positioning bevel 411 is set on the angular positioning block 41 by means of a hinge, etc., and the other side is set on the angular positioning block 41 by means of a height-adjustable telescopic rod, etc., or both sides of the positioning bevel 411 are set on the angular positioning block 41 by means of a height-adjustable telescopic rod, etc., and the inclination of the positioning bevel 411 can be adjusted by adjusting the height of the telescopic rod.
[0043] The crankshaft machining positioning mechanism with the above structure can be applied to machining crankshafts 1 of different specifications because the inclination of the positioning inclined surface 411 is adjustable, which can greatly improve the versatility of the crankshaft machining positioning mechanism.
[0044] In some embodiments, Figure 6As shown, the support block 3 is two V-shaped blocks 31, and the V-shaped blocks 31 are in an upward V-shape or a quasi-V-shape. The two V-shaped blocks 31 can hold the crankshaft 1 on both sides so that the axis of the crankshaft 1 is parallel to the bottom plane of the positioning base 2. In this embodiment, the number of the V-shaped blocks 31 is two, and multiple V-shaped blocks 31 can be set according to actual conditions, as long as the crankshaft 1 can be stably held so that the axis of the crankshaft 1 is parallel to the bottom plane of the positioning base 2.
[0045] The crankshaft machining positioning mechanism with the above structure uses the V-block 31 as the support block, which has higher positioning accuracy and can better limit the left and right movement of crankshafts 1 of different diameters, has higher versatility and better positioning effect.
[0046] In some embodiments, Figure 7 As shown, the angular positioning mechanism 4 is further provided with an elastic mechanism 42, and the elastic mechanism 42 is located between the angular positioning block 41 and the positioning base 2, so that the angular positioning block 41 can move up and down.
[0047] The crankshaft machining positioning mechanism adopting the above structure, through the setting of the elastic mechanism 42, on the one hand, based on the downward pressing force of the clamping mechanism on the crankshaft 1, the elastic mechanism 42 provides an upward elastic supporting force, and the interaction of the two forces can make the reference positioning plane better fit on the positioning inclined surface 411 on the angular positioning block 41, preventing the crankshaft 1 from rotating circumferentially during the machining process, thereby reducing the angular positioning error and improving the machining quality of the crankshaft 1. On the other hand, the setting of the elastic mechanism 42 can realize the up and down movement of the angular positioning block 41, and thus can be applicable to the fitting and positioning of crankshafts 1 of different diameters, further improving the versatility of the mechanism.
[0048] In some embodiments, Figure 8 As shown, the angular positioning mechanism 4 is further provided with two positioning pins 43, and the two positioning pins 43 are respectively located on both sides of the crankshaft 1; the elastic mechanism 42 is two springs 421 whose inner diameters are adapted to the positioning pins 43, and the two springs 421 are respectively sleeved at the roots of the two positioning pins 43; Fig. 9 As shown, the angular positioning block 41 is provided with positioning holes 412 adapted to the positioning pins 43 on both sides, so that the angular positioning block 41 can pass through the positioning pins 43 and be mounted on the two springs 421, thereby allowing the angular positioning block 41 to move up and down on the two positioning pins 43. Fig.10 , Fig.11 This is a schematic diagram of the crankshaft machining positioning mechanism in use.
[0049] The crankshaft machining positioning mechanism using the above structure can prevent the angular positioning block 41 from lateral displacement when it rises and falls under the action of elasticity under the guiding action of the two positioning pins 43, which can further improve the positioning accuracy and thus improve the machining quality of the crankshaft 1.
[0050] In some embodiments, the clamping mechanism is a pressure block located above the middle shaft section of the crankshaft 1. For example, in this embodiment, the clamping mechanism is arranged on the rotor journal section 15 of the crankshaft 1. By arranging the clamping mechanism on the middle shaft section of the crankshaft 1, the crankshaft 1 can be clamped better and more stably, and the rotor journal section 15 in this embodiment is longer and has a larger clamping area, which can also achieve a better clamping effect. In addition, the clamping mechanism can also adopt an implementation method of clamping the outer circle of the crankshaft with a pressure claw. More preferably, the pressure block or pressure claw can be two or even more, which can achieve a better clamping effect on the crankshaft 1.
[0051] In some embodiments, the crankshaft machining positioning mechanism further includes a rotating mechanism, which can make the crankshaft 1 move circumferentially on the support block 3. After the crankshaft 1 is placed on the support block 3, the reference positioning plane can be aligned with the positioning inclined surface 411 of the angular positioning block 41 by rotating the rotating mechanism, without manual rotation operation, which can further improve the machining efficiency.
[0052] In some embodiments, the crankshaft machining positioning mechanism further includes a position detection mechanism, which can detect the fit between the reference positioning plane and the positioning inclined surface 411 , and can further improve the positioning accuracy, thereby improving the machining quality of the crankshaft 1 .
[0053] In some embodiments, the support block 3 and the angular positioning block 41 are made of heat-treated No. 45 steel. No. 45 steel has a low cost and can meet the strength requirements. After heat treatment, its hardness reaches 55-60HRC to meet the requirements of long-term stability.
[0054] Second embodiment
[0055] As another embodiment, the crankshaft machining positioning mechanism of the utility model can also be used for angular positioning during the axial machining process of the crankshaft 1. The specific embodiment is as follows:
[0056] The structure of the crankshaft 1 is as follows Figure 1 , 2 As shown, Fig.12As shown, taking the processing of the axial oil groove 18 of the crankshaft 1 as an example, a reference positioning plane along the axial direction is provided on the crankshaft 1, and the reference positioning plane is perpendicular to the diameter of the crankshaft 1. The reference positioning plane can be an additional axial plane provided on the crankshaft 1, or can be other axial planes that have been machined on the crankshaft 1, such as an eccentric radial oil road surface 111, etc.; the crankshaft processing positioning mechanism includes a positioning base 2, an angular positioning mechanism 4 and a crankshaft clamping mechanism; a support block 3 is provided on the positioning base 2, and the support block 3 can lift the crankshaft 1 so that the axis of the crankshaft 1 is parallel to the bottom plane of the positioning base 2; the angular positioning mechanism 4 includes an angular positioning block 41, and the angular positioning block 41 is provided with a positioning inclined surface 411 that is in contact with the reference positioning plane; the crankshaft clamping mechanism can press the crankshaft 1 on the positioning base 2; the position of the angular positioning block 41 can be adaptively adjusted according to the selected reference plane.
[0057] When in use, the crankshaft 1 is placed on the support block 3, and the position of the crankshaft 1 is adjusted so that the reference positioning plane of the crankshaft 1 fits the positioning inclined surface 411, and then the crankshaft 1 is clamped by a clamping mechanism, and then a machining tool is used to machine the axial oil groove 18 of the crankshaft 1 at the corresponding position of the crankshaft 1.
[0058] The crankshaft machining positioning mechanism with the above structure is used to stably lift the crankshaft 1 through the support block 3, so that the axis of the crankshaft 1 is parallel to the bottom plane of the positioning base 2, so that the crankshaft 1 is in a flat state; by providing the angular positioning block 41, and providing a positioning bevel 411 on the upper surface of the angular positioning block 41, the reference positioning plane of the crankshaft 1 is affixed to the positioning bevel 411, and then the crankshaft 1 is pressed by the clamping mechanism, so that the angular positioning of the crankshaft 1 can be achieved; finally, by analyzing the angular relationship between the working plane of the axial oil groove 18 to be machined (in the utility model, the working plane of the axial oil groove 18 refers to the plane along the required machining direction, for example, machining the axial oil groove 18, that is, the plane passing through the axis of the oil groove or parallel to the axis of the oil groove along the direction of the axial oil groove 18) and the reference positioning plane, the position and direction of the machining tool can be determined, and then the machining tool is used to machine the crankshaft 1 at the corresponding position of the crankshaft 1. The crankshaft machining positioning mechanism provided by the utility model has simple material discharge, can improve the machining efficiency of the crankshaft 1, and has a better positioning effect on the crankshaft 1, and has a higher angular positioning accuracy, which can improve the machining quality of the crankshaft 1.
[0059] In some embodiments, the angle between the positioning inclined surface 411 and the bottom plane of the positioning base 2 is the positioning angle, and the angle between the axial working plane to be processed and the reference positioning plane is equal to the positioning angle. Figure 3As shown, the eccentric radial oil road surface 111 is used as the reference positioning plane to machine the axial oil groove 18, then the angle between the positioning bevel 411 and the bottom plane of the positioning base 2 is 180°-α, and the angle between the working plane of the axial oil groove 18 and the reference positioning plane is also 180°-α.
[0060] By adopting the crankshaft machining positioning mechanism of the above structure, by setting the angle between the positioning bevel 411 and the bottom plane of the positioning base 2 to be equal to the angle between the axial working plane to be machined and the reference positioning plane, the position of the axial oil groove 18 to be machined can be located directly above the crankshaft 1, which can make machining more convenient and stable, with higher machining reliability and better quality.
[0061] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes made based on the shape, structure and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A crankshaft machining positioning mechanism, used for angular positioning of a crankshaft (1) during machining, wherein the crankshaft (1) is provided with a reference positioning plane along the axial direction, characterized in that: The invention comprises a positioning base (2), an angular positioning mechanism (4) and a crankshaft pressing mechanism; the positioning base (2) is provided with a support block (3), the support block (3) can lift the crankshaft (1) so that the axis of the crankshaft (1) is parallel to the bottom plane of the positioning base (2); the angular positioning mechanism (4) comprises an angular positioning block (41) provided with a positioning inclined surface (411) which is in contact with the reference positioning plane; the crankshaft pressing mechanism can press the crankshaft (1) onto the positioning base (2).
2. The crankshaft machining positioning mechanism according to claim 1, characterized in that: The angle between the positioning inclined surface (411) and the bottom plane of the positioning base (2) is the positioning angle; when the working plane to be processed is along the axial direction, the angle between the working plane and the reference positioning plane is equal to the positioning angle; or, when the working plane to be processed is along the radial direction, the angle between the vertical plane of the working plane and the reference positioning plane is equal to the positioning angle.
3. The crankshaft machining positioning mechanism according to claim 1 or 2, characterized in that: When there is a plane along the axial direction that has been machined on the crankshaft (1), the plane can be used as a reference positioning plane.
4. The crankshaft machining positioning mechanism according to any one of claims 1 or 2, characterized in that: The inclination of the positioning inclined surface (411) is adjustable.
5. The crankshaft machining positioning mechanism according to claim 1 or 2, characterized in that: The support block (3) is at least two V-shaped blocks (31), and the at least two V-shaped blocks (31) can hold up the crankshaft (1) in a close fit on both sides, so that the axis of the crankshaft (1) is parallel to the bottom plane of the positioning base (2).
6. The crankshaft machining positioning mechanism according to claim 1 or 2, characterized in that: The angular positioning mechanism (4) is also provided with an elastic mechanism (42), and the elastic mechanism (42) is located between the angular positioning block (41) and the positioning base (2), so that the angular positioning block (41) can move up and down.
7. The crankshaft machining positioning mechanism according to claim 6, characterized in that: The angular positioning mechanism (4) is further provided with two positioning pins (43), and the two positioning pins (43) are respectively located on both sides of the crankshaft (1); the elastic mechanism (42) is two springs (421) whose inner diameters are adapted to the positioning pins (43), and the two springs (421) are respectively sleeved on the roots of the two positioning pins (43); positioning holes (412) adapted to the positioning pins (43) are respectively provided on both sides of the angular positioning block (41), so that the angular positioning block (41) can pass through the positioning pins (43) and be mounted on the two springs (421).
8. The crankshaft machining positioning mechanism according to claim 1 or 2, characterized in that: The clamping mechanism is a pressure block located above the middle shaft section of the crankshaft (1).
9. The crankshaft machining positioning mechanism according to claim 1 or 2, characterized in that: It also comprises a rotating mechanism, which can make the crankshaft (1) rotate circumferentially on the supporting block (3).
10. The crankshaft machining positioning mechanism according to claim 1 or 2, characterized in that: It also includes a position detection mechanism, which can detect the fit between the reference positioning plane and the positioning inclined surface (411).