CRANKWAVE SIMULATION DEVICE, SELECT DEVICE AND METHOD

Abstract

Crankshaft simulation device, characterized in that it comprises: a generally cylindrical fixed shaft (1) having a first axial end and a second axial end, wherein a through-hole (13) extending in the axial direction of the fixed shaft (1) and passing through the fixed shaft (1) is provided; a wedge-shaped rod (3) inserted into the through-hole (13) and movable in the axial direction of the fixed shaft (1) under an external force, wherein the first end of the wedge-shaped rod (3) is extendable from the first axial end of the fixed shaft (1), wherein the second end of the wedge-shaped rod (3) is extendable from the second axial end of the fixed shaft (1), and wherein the first end of the wedge-shaped rod (3) is provided with an inclined surface (31) such that the first end of the wedge-shaped rod (3) is wedge-shaped;a support rod (14) extending from the first axial end of the fixed shaft (1) in the axial direction of the fixed shaft (1), wherein the first end of the support rod (14) is a free end and the second end (142) of the support rod (14) is attached to the first axial end of the fixed shaft (1);a generally cylindrical movable shaft (2) in which a flat through-hole (21) is provided, wherein the flat through-hole (21) extends in the axial direction of the movable shaft (2) and passes through the movable shaft (2), wherein the support rod (14) is inserted into the flat through-hole (21) so that the movable shaft (2) is supported on the support rod (14), wherein the size of the flat through-hole (21) in the radial direction of the movable shaft (2) is such that the movable shaft (2) is displaceable in the radial direction of the movable shaft (2), wherein the flat through-hole (21) is such that the first end of the wedge-shaped rod (3) can be inserted into the flat through-hole (21) before the movable shaft (2) is displaced in the radial direction of the movable shaft (2);and a spring (4), one end of which rests against the support rod (14) and the other end of which rests against the inner wall of the flat through-hole (21) of the movable shaft (2) to push the movable shaft (2) outwards in the radial direction, wherein in the non-operating state of the crankshaft simulation device the first end of the wedge-shaped rod (3) is inserted into the flat through-hole (21) and the movable shaft (2) is not displaceable in the radial direction because the movable shaft (2) is blocked by the first end of the wedge-shaped rod (3), which results in the central axis of the movable shaft (2) being substantially aligned with the central axis OO' of the fixed shaft (1), so that the crankshaft simulation device generally has the form of a straight shaft;wherein, in the operating state of the crankshaft simulation device, the first end of the wedge-shaped rod (3) is moved out of the flat through-hole (21) and retracted into the through-hole (13), and the movable shaft (2) is displaced outwards in the radial direction of the movable shaft (2) under the elastic force of the spring (4), causing the central axis of the movable shaft (2) to deviate from the central axis OO' of the fixed shaft (1), so that the crankshaft simulation device generally has the shape of a crankshaft and the movable shaft (2) can be driven by the fixed shaft (1) to rotate eccentrically.

Description

The present disclosure relates to a crankshaft simulation device suitable for simulating the motion of a crankshaft in a scroll compressor. The present disclosure also relates to a detection device that uses such a crankshaft simulation device and to a method for detecting the eccentric motion trajectory of a moving component using the detection device. The eccentric movement of a moving component is widely used in machinery and industrial products to create an ideal path of motion or to generate higher air or oil pressure through continuous compression. A scroll compressor, for example, can generate a more stable air pressure with higher efficiency. For example, German patent DE 197 46 180 A1 discloses a crankshaft with an adjustable stroke, as well as a tool and a method for adjusting the eccentric position of individual eccentrics that are attached to the crankshaft via pressure-controlled connections. For this purpose, a rod element is inserted into an axial bore of the crankshaft to seal one section of the bore and selectively apply high-pressure fluid to another section. This allows the press fit of a selected eccentric to be loosened without affecting the other eccentrics, so that its relative angular and temporal position can be adjusted. After adjustment, the pressure is released, thereby reconnecting the eccentric to the crankshaft in a force-fit manner. Document CN 1 03 512 478 A further discloses a special gauge for detecting the distance between the piston bore of a compressor cylinder and the eccentric crankshaft bore. The gauge has a shaft with a handle, a clamping head attached to the upper end, and a stop, with an elastic projection provided on the shaft. By inserting the gauge into the crankshaft bore and subsequently into the piston bore, it can be quickly determined whether the machining of the bores is dimensionally accurate. This reduces testing time and increases detection efficiency in the manufacture of compressor cylinders. Document CN 2 07 673 544 U discloses a crankshaft for a compressor and a compressor incorporating this crankshaft, which enables improved lubrication and reduced friction between the eccentric and the ring in the cylinders. The crankshaft comprises a shaft body with upper and lower sections, at least one eccentric section with eccentric and non-eccentric surfaces, longitudinal oil channels, and lateral oil reservoir areas for continuous oil supply. This arrangement maintains a constant oil film thickness at the contact surfaces, reduces heat generation, and extends the service life of the crankshaft. The compressor utilizes the crankshaft to efficiently compress refrigerant gas and reduce energy consumption. When it is necessary to manually capture the eccentric motion of a moving component, there is often no suitable crankshaft that can be easily inserted into the moving component to transmit the force, or it can only be positioned awkwardly with the moving component, or it cannot be inserted into the moving component once the assembly of the tool and moving component is complete. In particular, the moving component must be inserted into the tool before its eccentric motion can be manually simulated. However, due to the limited space within the tool, it is difficult to extend the crankshaft to supply energy to the moving component through the tool. This severely hinders the capture process. Therefore, it is desirable to design a retractable crankshaft that can be easily inserted into the moving component and switched to an operating mode, so that the manual detection of the eccentric movement of the moving component can be easily achieved. This disclosure is intended to help solve the above-mentioned problem and other possible technical problems. According to one aspect of the present disclosure, a crankshaft simulation device is provided. The crankshaft simulation device comprises: - a generally cylindrical fixed shaft formed with a first axial end and a second axial end, and a through-hole extending in the axial direction of the fixed shaft and passing through the fixed shaft; - a wedge-shaped rod inserted into the through-hole, movable in the axial direction of the fixed shaft under an external force, and the first end of the wedge-shaped rod being extendable from the first axial end of the fixed shaft, the second end of the wedge-shaped rod being extendable from the second axial end of the fixed shaft, and the first end of the wedge-shaped rod being provided with an inclined surface such that the first end of the wedge-shaped rod is wedge-shaped;- a support rod extending from the first axial end of the fixed shaft in the axial direction of the fixed shaft, wherein the first end of the support rod is a free end and the second end of the support rod is attached to the first axial end of the fixed shaft;- a generally cylindrical movable shaft in which a flat through-hole is provided, and the flat through-hole is designed to extend in the axial direction of the movable shaft and to pass through the movable shaft, wherein the support rod is inserted into the flat through-hole so that the movable shaft is supported on the support rod, and the size of the flat through-hole in the radial direction of the movable shaft is designed such that the movable shaft is displaceable in the radial direction of the movable shaft, and the flat through-hole is designed such that the first end of the wedge-shaped rod can be inserted into the flat through-hole before the movable shaft is displaced in the radial direction of the movable shaft;and a spring, one end of which rests against the support rod and the other end of which rests against the inner wall of the flat through-hole of the movable shaft, in order to push the movable shaft outwards in a radial direction. In the non-operating state of the crankshaft simulation device, the first end of the wedge-shaped rod is inserted into the flat through-hole and the movable shaft is not displaceable in the radial direction because the movable shaft is blocked by the first end of the wedge-shaped rod, resulting in the central axis of the movable shaft being essentially aligned with the central axis of the fixed shaft, so that the crankshaft simulation device generally has the shape of a straight shaft.In the operating state of the crankshaft simulation device, the first end of the wedge-shaped rod is moved out of the flat through-hole and retracted into the through-hole, and the movable shaft is displaced outwards in the radial direction of the movable shaft under the elastic force of the spring, causing the central axis of the movable shaft to deviate from the central axis of the fixed shaft, so that the crankshaft simulation device generally has the shape of a crankshaft and the movable shaft can be driven by the fixed shaft to rotate eccentrically. Preferably, a projection is provided on the end face of the first axial end of the fixed shaft, and a groove is provided on the end face of the movable shaft opposite the first axial end of the fixed shaft, the groove extending in the displacement direction of the movable shaft, and the projection being embedded in the groove. The projection is displaceable in the groove when the movable shaft is displaced in the radial direction. A circumferential force can be applied to the side wall of the groove by means of the projection when the fixed shaft is rotated about its central axis, thereby causing the movable shaft to rotate eccentrically. The support rod and the fixed shaft can be formed as a single piece. Alternatively, the support rod can be a separate component from the fixed shaft, with the second end of the support rod inserted and secured in a hole in the first axial end of the fixed shaft. In particular, when the second end of the wedge-shaped rod is pulled by an external force, the wedge-shaped rod is moved away from the movable shaft in the axial direction of the fixed shaft, so that the first end of the wedge-shaped rod is moved out of the shallow through-hole and pulled back into the through-hole. When the second end of the wedge-shaped rod is pushed by an external force, the wedge-shaped rod is moved in the direction of the movable shaft in the axial direction of the fixed shaft, and the first end of the wedge-shaped rod is pulled out of the through-hole and gradually inserted into the flat through-hole of the movable shaft, so that the movable shaft is returned to an undisplaced state as it is pushed through the inclined surface of the first end of the wedge-shaped rod. Optionally, a block is provided at the first end of the support rod to prevent the movable shaft from falling off the support rod. Optionally, the diameters of the two ends of the wedge-shaped rod are larger than the diameter of the middle section of the wedge-shaped rod, and the diameter of the middle section of the through-hole is smaller than the diameter of the two ends of the wedge-shaped rod to prevent the wedge-shaped rod from falling out of the through-hole. According to a further aspect of the present disclosure, a detection device is provided for detecting the eccentric motion path of a moving component. The detection device comprises: a crankshaft simulation device according to the preceding aspect; and a tool in which tool holes are provided, and a movable component to be detected, which is pre-assembled in the tool. In the non-operating state of the crankshaft simulation device, the movable shaft and a portion of the fixed shaft can be inserted into the tool holes, which causes the movable shaft to be inserted into the movable component to be detected, so that the movable component to be detected is driven by the movable shaft to execute an eccentric motion in the operating state of the crankshaft simulation device. According to a further aspect of the present disclosure, a method for detecting the eccentric motion path of a moving component using the detection device described in the preceding aspect is provided. The method comprises: - arranging the moving component to be detected in the tool; - inserting the moving shaft and a portion of the fixed shaft into the tool holes in the non-operating state of the crankshaft simulation device, such that the moving shaft is inserted into the moving component to be detected;- Pulling the second end of the wedge-shaped rod with an external force to move the wedge-shaped rod away from the movable shaft in the axial direction of the fixed shaft, and moving the first end of the wedge-shaped rod out of the shallow through-hole and retracting it into the through-hole, whereby the movable shaft is displaced outwards in the radial direction under the elastic force of the spring, causing the central axis of the movable shaft to deviate from the central axis of the fixed shaft, thereby causing the crankshaft simulation device to switch to the operating state; and - the fixed shaft is driven by an external force to rotate about its central axis, the movable shaft is driven by the fixed shaft to an eccentric rotation, and the moving component to be detected is driven by the movable shaft to an eccentric movement. The procedure described above may further include: pressing the second end of the wedge-shaped rod with an external force, after the eccentric path of motion of the moving component has been detected, in order to move the wedge-shaped rod in the direction of the moving shaft in the axial direction of the fixed shaft; and retracting the first end of the wedge-shaped rod from the through-hole and gradually inserting it into the shallow through-hole of the moving shaft, so that the moving shaft is returned to an undisplaced state due to the pressure exerted by the inclined surface of the first end of the wedge-shaped rod; and removing the crankshaft simulation device from the tool holes. In the method described above, the external force can be applied by the hand of an operator of the recording device. For a component driven by the drive shaft and moving eccentrically within the tool, the crankshaft simulation device provided by this disclosure can be used as a drive connecting shaft to facilitate insertion and removal from the tool and to switch between operating and non-operating states. Furthermore, the crankshaft simulation device provided by this disclosure has a simple structure, good practical effect, and is suitable for technical applications. To facilitate understanding of this disclosure, it is described in more detail below with reference to exemplary embodiments and in conjunction with the accompanying drawings. The same or similar reference numbers are used in the accompanying drawings to indicate identical or similar components. It should be understood that the accompanying drawings are schematic only and that the dimensions and proportions of the components in the accompanying drawings are not necessarily precise. Figs. 1A and 1B are perspective partial exploded views of a crankshaft simulation device according to an exemplary embodiment of this disclosure; Figs. 2A and 2B are longitudinal section and perspective views of a crankshaft simulation device in the non-operating state; Figs. 3A and 3B are longitudinal section and perspective views of a crankshaft simulation device in the operating state; Figs. 4A and 4B are longitudinal section and perspective views of a crankshaft simulation device in the operating state.Figure 4B shows schematic cross-sectional views of a crankshaft simulation device according to a variant of the present disclosure, taken along the plane AA in Fig. 3A and along the plane BB in Fig. 3B, respectively. The present disclosure is described in detail below with reference to the accompanying drawings. Fig. 1A and Fig. 1B are perspective partial exploded views of a crankshaft simulation device according to an exemplary embodiment of the present disclosure. As shown in Fig. 1A and Fig. 1B, a crankshaft simulation device mainly comprises a fixed shaft 1, a support rod 14, a movable shaft 2, a wedge-shaped rod 3 and a spring 4. In particular, the fixed shaft 1 is formed with a main body 11, which is generally cylindrical and has a first axial end and a second axial end. Optionally, a gripping area 12 with greater frictional force is provided on the outer circumference of the second axial end of the fixed shaft 1, so that it is convenient for an operator of the crankshaft simulation device to hold it and apply an external force by hand. A through-hole 13 is provided in the fixed shaft 1. The through-hole 13 extends in the axial direction of the fixed shaft 1 and passes through the fixed shaft 1. The support rod 14 extends from the first axial end of the fixed shaft 1 in the axial direction of the fixed shaft. The first end of the support rod 14 is a free end, and the second end 142 of the support rod is attached to the first axial end of the fixed shaft 1. In the embodiment shown in Figs. 1A and 1B, the support rod 14 is a separate component with respect to the fixed shaft 1, and the second end 142 of the support rod 14 is inserted into and secured in a hole 16 of the first axial end of the fixed shaft 1. Although not explicitly shown in the drawings, those skilled in the art can imagine that the support rod 14 can be attached to the first axial end of the fixed shaft 1 by welding, bolting, wedging, etc. Optionally, the support rod 14 and the fixed shaft 1 are formed in one piece. Preferably, the central axis of the support rod 14 is collinear with the central axis OO' of the fixed shaft 1. The wedge-shaped rod 3 is pre-inserted into the through-hole 13. Under an external force, the wedge-shaped rod 3 can move axially along the fixed shaft 1. The first end of the wedge-shaped rod 3 can extend from the first axial end of the fixed shaft 1, and the second end of the wedge-shaped rod 3 can extend from the second axial end of the fixed shaft 1. A sloping surface 31 is provided at the first end of the wedge-shaped rod 3, giving it a wedge shape. Optionally, the diameters of both ends of the wedge-shaped rod 3 are larger than the diameter of the central section 33 of the wedge-shaped rod, and accordingly, the diameter of the central section of the through-hole 13 is smaller than the diameter of both ends of the wedge-shaped rod 3 to prevent the wedge-shaped rod 3 from falling out of the through-hole 13.In particular, a block 32 is provided at the second end of the wedge-shaped rod 3. The block 32 not only prevents the wedge-shaped rod 3 from falling out of the through-hole 13, but also makes it easier for the operator of the crankshaft simulation device to manually apply an external force (tensile or compressive force) to the wedge-shaped rod 3. The movable shaft 2 is designed to have an overall cylindrical shape. A shallow through-hole 21 is provided in the movable shaft 2. The shallow through-hole 21 extends in the axial direction of the movable shaft 2 and passes through it. The support rod 14 is inserted into the shallow through-hole 21 so that the movable shaft 2 can be supported on the support rod 14. Optionally, a block 141 is provided at the first end of the support rod 14 to prevent the movable shaft 2 from falling off the support rod 14. The size of the shallow through-hole 21 in the radial direction of the movable shaft 2 is designed such that the movable shaft 2 can be displaced in its radial direction.The flat through-hole 21 is designed such that the first end of the wedge-shaped rod 3 can be inserted into the flat through-hole before the movable shaft 2 is moved in the radial direction of the movable shaft 2. One end of the spring 4 rests against the support rod 14, and the other end rests against the inner wall of the shallow through-bore 21 of the movable shaft 2, so that the movable shaft 2 is pushed outwards in the radial direction, i.e., the movable shaft 2 is pushed away from the support rod 14 in the radial direction. For positioning the spring 4, a bore 143 is provided on the outer circumference of the support rod 14 to receive one end of the spring 4, and correspondingly, a bore 23 is provided on the inner wall of the shallow through-bore 21 to receive the other end of the spring 4. Furthermore, machining holes may be provided on the support rod 14 and / or the movable shaft 2 for easy installation and fastening of the spring 4. For the sake of simplicity, these machining holes are not shown in the drawings.Even though only one spring 4 is schematically depicted in the drawings, the person skilled in the art can imagine that a large number of springs 4 can be provided according to the actual needs. Optionally, a projection 15 is provided on the end face of the first axial end of the fixed shaft 1, and a groove 22 is provided on the end face of the movable shaft 2 opposite the first axial end of the fixed shaft 1. The groove 22 is designed to extend in the displacement direction of the movable shaft 2, and the projection 15 is embedded in the groove 22. The projection 15 can slide in the groove 22 when the movable shaft 2 is displaced radially (actually, it is not the projection 15 that moves, but the groove 22). The projection 15 exerts a circumferential force on the side wall of the groove 22 when the fixed shaft 1 is rotated about its central axis 00°, thereby causing the movable shaft 2 to rotate eccentrically. Figures 2A and 2B are longitudinal section and perspective views of a crankshaft simulation device in its non-operating state. Figures 3A and 3B are longitudinal section and perspective views of a crankshaft simulation device in its operating state. As shown in Fig. 2A and Fig. 2B, the first end of the wedge-shaped rod 3 is inserted into the flat through-hole 21 and the movable shaft 2 cannot be displaced in the radial direction of the movable shaft 2 because it is blocked by the first end of the wedge-shaped rod 3, which results in the central axis of the movable shaft 2 being substantially aligned with the central axis OO' of the fixed shaft, so that the crankshaft simulation device generally has the form of a straight shaft. To switch the crankshaft simulation device to the operating state, the second end of the wedge rod 3 is pulled with an external force to move the wedge-shaped rod 3 away from the movable shaft 2 in the axial direction of the fixed shaft 1 (i.e., in the direction indicated by arrow R2). In this way, the first end of the wedge-shaped rod 3 is moved out of the shallow through-bore 21 and retracted into the through-bore 13, and the movable shaft 2 is displaced outwards in the radial direction of the movable shaft 2 under the elastic force of the spring 4 (i.e., moved in the direction indicated by arrow R3).At this point, the central axis of the movable shaft 2 deviates from the central axis OO' of the fixed shaft 1, so that the crankshaft simulation device generally has the shape of a crankshaft and the fixed shaft 1 can drive the movable shaft 2 to rotate eccentrically, as shown in Fig. 3A and Fig. 3B. The present disclosure also provides a detection device (not shown) suitable for detecting the eccentric motion path of the moving component. The detection device comprises a crankshaft simulation device and a tool as described above. The tools are provided with holes, and a moving component to be detected is pre-positioned in the tool. In the non-operating state of the crankshaft simulation device, the movable shaft 2 and a portion of the main body 11 of the fixed shaft 1 (e.g., the portion not covered by the gripping area 12) can be inserted into the tool holes, causing the movable shaft 2 to be inserted into the moving component to be detected. The moving component is then driven by the movable shaft 2 to perform an eccentric motion in the operating state of the crankshaft simulation device. The present disclosure also provides a method for detecting an eccentric motion path of a moving component using the detection device described above. The method comprises: - arranging the detecting moving component in the tool; - inserting the movable shaft 2 and a portion of the fixed shaft 1 (e.g., the portion not covered by the gripping area 12) into the tool holes in the direction indicated by arrow R1 in Fig. 2B while the crankshaft simulation device is in a non-operating state, so that the movable shaft 2 is inserted into the moving component to be detected; - pulling the second end of the wedge-shaped rod 3 with an external force while the fixed shaft 1 is stationary, in order to move the wedge-shaped rod 3 away from the movable shaft 2 in the axial direction of the fixed shaft 1 (i.e.,to move in the direction indicated by arrow R2) and moving the first end of the wedge-shaped rod 3 out of the shallow through-hole 21 and retracting it into the through-hole 1, whereby the movable shaft 2 is displaced outwards in the radial direction of the movable shaft 2 under the elastic force of the spring 4 (i.e., moved in the direction indicated by arrow R3), causing the central axis of the movable shaft 2 to deviate from the central axis OO' of the fixed shaft 1, thereby switching the crankshaft simulation device into the operating state; and- driving the fixed shaft 1 by an external force to rotate about its central axis OO', wherein the movable shaft 1 is driven by the fixed shaft 2 to perform an eccentric rotation and the movable component 2 to be detected is driven by the movable shaft to perform an eccentric movement. The procedure may further include: pressing the second end of the wedge-shaped rod 3 with an external force, after the eccentric path of motion of the moving component has been detected, in order to move the wedge-shaped rod 3 in the direction of the moving shaft 2 in the axial direction of the fixed shaft; and retracting the first end (i.e. the wedge-shaped tip) of the wedge-shaped rod 3 from the through-hole 13 and gradually inserting it into the shallow through-hole 21 of the moving shaft 2, so that the first end (i.e. the wedge-shaped tip) of the wedge-shaped rod 3 is withdrawn from the through-hole 13 and gradually inserted into the shallow through-hole 21 of the moving shaft 2, so that the moving shaft 2 is returned to an undisplaced state due to the pressure by the inclined surface 31 of the first end of the wedge-shaped rod 3; and then removing the crankshaft simulation device from the tool holes. The external forces mentioned above can be applied by the hand of an operator of the detection device, and these external forces include a tensile force and a compressive force to move the wedge-shaped rod 3 and a driving force to rotate the fixed shaft 1 about its central axis OO'. Although the embodiment in which the support rods 14 are cylindrical overall has been described mainly above, in variant 1 the support rod 14 can generally have the shape of a prism (e.g. a square prism) as long as the support rod 14 can be displaced in the flat through-hole 21 in the radial direction of the movable shaft 2. Furthermore, the shallow through-bore 21 can be dimensioned such that the prismatic support rod 14 cannot rotate within the shallow through-bore 21 relative to it. In this way, the prismatic support rod 14 can serve to determine the direction of movement of the movable shaft 2 and to transmit a torque to the movable shaft 2. In this case, the projection 15 and the groove 22 can be omitted or removed, as in the embodiment described above. Figures 4A and 4B are schematic cross-sectional views of a crankshaft simulation device according to variant 1 along plane AA in Figure 3A and along plane BB in Figure 3B, respectively. A single quotation mark has been added in the upper right corner of the reference numerals of the corresponding components in Figures 4A and 4B to distinguish them as described above. Furthermore, for the sake of brevity, the springs arranged in holes 23' and 143' are not shown in Figures 4A and 4B, but the person skilled in the art can imagine their presence. In particular, as shown in Fig. 4A, the wedge-shaped rod 3' begins to move away from the movable shaft 2' in the axial direction of the fixed shaft (i.e., in a direction perpendicular to the inward direction of the drawing in the view of Fig. 4A). As the wedge-shaped rod 3' moves, the movable shaft 2' is gradually no longer pressed against the wedge-shaped rod 3' (the inclined surface 31'). Then, under the compressive force of the springs provided in the holes 23' and 143' (not shown), the movable shaft 2' gradually moves away from the support rod 14' in the direction indicated by arrow R3 (vertically upwards in the view of Fig. 4B), and finally the crankshaft simulation device enters the operating state shown in Figs. 3A, 3B, and 4B. Since in this case the support rod 14' generally has the shape of a quadrilateral prism and is designed such that it has flat left and right side faces that run parallel to each other, and the flat through-hole 21' is designed such that it has flat left and right inner surfaces that run parallel to each other, the sliding fit structure formed by the flat through-hole 21' and the support rod 14' can determine the direction of movement of the movable shaft 2'. Furthermore, the flat through-hole 21' is dimensioned such that the prismatic support rod 14' cannot rotate within the flat through-hole 21' relative to the flat through-hole 21', so that the support rod 14' can transmit the torque to the movable shaft 2', thereby causing the movable shaft 2' to rotate.Therefore, in this case, the projections 15 and the groove 22, as described in the previous embodiment, can be omitted or removed. The embodiment in which the projection 15 is provided on the fixed shaft 1 and the groove 22 on the movable shaft 2 has been described above. It is understood that the groove can also be provided on the fixed shaft 1 and the projection on the movable shaft 2. Furthermore, the dimensions and the number of projections and grooves are not particularly limited. Although the crankshaft simulation device described above is suitable for simulating the motion of a crankshaft in a scroll compressor, it can, of course, also be used as a drive shaft for other types of moving components that move eccentrically. Furthermore, all technical solutions improved and refined based on the present disclosure (e.g., adding a locking washer or protective cover, applying additional adhesive or solder, adding a lubricant or cooling channel, etc.) are implicitly disclosed in this article. Although the technical objects, solutions, and effects of this disclosure have been described in detail above with reference to specific embodiments, these embodiments are merely exemplary and not limiting. Within the scope of the essential meaning and principles of this disclosure, all modifications, equivalent substitutions, and improvements made by those skilled in the art are included within the scope of protection of this disclosure.

Claims

Crankshaft simulation device, characterized in that it comprises: a generally cylindrical fixed shaft (1) having a first axial end and a second axial end, wherein a through-hole (13) extending in the axial direction of the fixed shaft (1) and passing through the fixed shaft (1) is provided; a wedge-shaped rod (3) inserted into the through-hole (13) and movable in the axial direction of the fixed shaft (1) under an external force, wherein the first end of the wedge-shaped rod (3) is extendable from the first axial end of the fixed shaft (1), wherein the second end of the wedge-shaped rod (3) is extendable from the second axial end of the fixed shaft (1), and wherein the first end of the wedge-shaped rod (3) is provided with an inclined surface (31) such that the first end of the wedge-shaped rod (3) is wedge-shaped;a support rod (14) extending from the first axial end of the fixed shaft (1) in the axial direction of the fixed shaft (1), wherein the first end of the support rod (14) is a free end and the second end (142) of the support rod (14) is attached to the first axial end of the fixed shaft (1);a generally cylindrical movable shaft (2) in which a flat through-hole (21) is provided, wherein the flat through-hole (21) extends in the axial direction of the movable shaft (2) and passes through the movable shaft (2), wherein the support rod (14) is inserted into the flat through-hole (21) so that the movable shaft (2) is supported on the support rod (14), wherein the size of the flat through-hole (21) in the radial direction of the movable shaft (2) is such that the movable shaft (2) is displaceable in the radial direction of the movable shaft (2), wherein the flat through-hole (21) is such that the first end of the wedge-shaped rod (3) can be inserted into the flat through-hole (21) before the movable shaft (2) is displaced in the radial direction of the movable shaft (2);and a spring (4), one end of which rests against the support rod (14) and the other end of which rests against the inner wall of the flat through-hole (21) of the movable shaft (2) to push the movable shaft (2) outwards in the radial direction, wherein in the non-operating state of the crankshaft simulation device the first end of the wedge-shaped rod (3) is inserted into the flat through-hole (21) and the movable shaft (2) is not displaceable in the radial direction because the movable shaft (2) is blocked by the first end of the wedge-shaped rod (3), which results in the central axis of the movable shaft (2) being substantially aligned with the central axis OO' of the fixed shaft (1), so that the crankshaft simulation device generally has the form of a straight shaft;wherein, in the operating state of the crankshaft simulation device, the first end of the wedge-shaped rod (3) is moved out of the flat through-hole (21) and retracted into the through-hole (13), and the movable shaft (2) is displaced outwards in the radial direction of the movable shaft (2) under the elastic force of the spring (4), causing the central axis of the movable shaft (2) to deviate from the central axis OO' of the fixed shaft (1), so that the crankshaft simulation device generally has the shape of a crankshaft and the movable shaft (2) can be driven by the fixed shaft (1) to rotate eccentrically. Crankshaft simulation device according to claim 1, wherein a projection (15) is provided on the end face of the first axial end of the fixed shaft (1) and a groove (22) is provided on the end face of the movable shaft (2) opposite the first axial end of the fixed shaft (1), wherein the groove (22) extends in the displacement direction of the movable shaft (2) and the projection (15) is embedded in the groove (22), the projection (15) is displaceable in the groove (22) when the movable shaft (2) is displaced in the radial direction and a circumferential force can be applied to the side wall of the groove (22) by means of the projection (15) when the fixed shaft (1) is rotated about its central axis OO', thereby causing the movable shaft (2) to rotate eccentrically. Crankshaft simulation device according to claim 1, wherein the support rod (14) and the fixed shaft (1) are formed in one piece; or the support rod (14) is a separate component from the fixed shaft (1), wherein the second end (142) of the support rod (14) is inserted and fastened in a hole (16) of the first axial end of the fixed shaft (1). Crankshaft simulation device according to claim 1, wherein, when the second end of the wedge-shaped rod (3) is pulled by an external force, the wedge-shaped rod (3) is moved away from the movable shaft (2) in the axial direction of the fixed shaft (1), so that the first end of the wedge-shaped rod (3) is moved out of the flat through-hole (21) and retracted into the through-hole (13); and when the second end of the wedge-shaped rod (3) is pressed by an external force, the wedge-shaped rod (3) is moved in the direction of the movable shaft (2) in the axial direction of the fixed shaft (1), and the first end of the wedge-shaped rod (3) is pulled out of the through hole (13) and gradually inserted into the flat through hole (21) of the movable shaft (2), so that the movable shaft (2) is returned to a non-displaced state, as it is pressed through the inclined surface (31) of the first end of the wedge-shaped rod (3). Crankshaft simulation device according to one of claims 1 to 4, wherein a block is provided at the first end of the support rod (14) to prevent the movable shaft (2) from falling off the support rod (14). Crankshaft simulation device according to one of claims 1 to 4, wherein the diameters of the two ends of the wedge-shaped rod (3) are larger than the diameter of a middle section (33) of the wedge-shaped rod (3) and the diameter of a middle section of the through-hole (13) is smaller than the diameter of the two ends of the wedge-shaped rod (3) to prevent the wedge-shaped rod (3) from falling out of the through-hole (13). A detection device for detecting an eccentric motion path of a moving component, characterized in that the detection device comprises: a crankshaft simulation device according to one of the preceding claims and a tool in which tool holes are provided and a movable component to be detected, which is pre-assembled in the tool, wherein in the non-operating state of the crankshaft simulation device the movable shaft (2) and a part of the fixed shaft (1) can be inserted into the tool holes, which results in the movable shaft (2) being inserted into the movable component to be detected, so that the movable component to be detected is driven by the movable shaft (2) to perform an eccentric movement in the operating state of the crankshaft simulation device. Method for detecting an eccentric motion path of a moving component using the detection device according to claim 7, comprising: arranging the moving component to be detected in the tool; inserting the movable shaft (2) and a portion of the fixed shaft (1) into the tool holes in the non-operating state of the crankshaft simulation device, such that the movable shaft (2) is inserted into the moving component to be detected; pulling the second end of the wedge-shaped rod (3) with an external force to move the wedge-shaped rod (3) away from the movable shaft (2) in the axial direction of the fixed shaft (1) and moving the first end of the wedge-shaped rod (3) out of the shallow through-hole (21) and retracting it into the through-hole (13), wherein the movable shaft (2) is displaced outwards in the radial direction under the elastic force of the spring (4),whereupon the central axis of the movable shaft (2) deviates from the central axis OO' of the fixed shaft (1), causing the crankshaft simulation device to switch to the operating state and the fixed shaft (1) to rotate about its central axis OO' by an external force, the movable shaft (2) to rotate eccentrically by the fixed shaft (1), and the movable component to be detected to move eccentrically by the movable shaft (2). The method of claim 8, further comprising: pressing the second end of the wedge-shaped rod (3) with an external force after the eccentric path of motion of the movable component has been detected in order to move the wedge-shaped rod (3) in the direction of the movable shaft (2) in the axial direction of the fixed shaft (1); extending the first end of the wedge-shaped rod (3) out of the through-hole (13) and gradually inserting it into the shallow through-hole (21) of the movable shaft (2) so that the movable shaft (2) is returned to an undisplaced state due to the pressure exerted by the inclined surface (31) of the first end of the wedge-shaped rod (3); and removing the crankshaft simulation device from the tool holes. Method according to claim 8 or 9, wherein the external force is applied by the hand of an operator of the detection device.

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