Engine pedestal centering device and engine pedestal testing device

Abstract

The utility model relates to an engine pedestal centering device and an engine pedestal testing device. The engine stand centering device comprises a dynamometer side fixing assembly which comprises a dynamometer side fixing disc and a limiting assembly, the dynamometer side fixing disc is connected with a stand dynamometer device, and the limiting assembly is arranged on the side, back to the stand dynamometer device, of the dynamometer side fixing disc; wherein the limiting assembly comprises a centering groove; the engine side fixing assembly comprises an engine side fixing disc and a centering adjusting assembly, the engine side fixing disc is connected with the engine device, and the centering adjusting assembly is arranged on the side, back to the engine device, of the engine side fixing disc; the centering adjusting assembly comprises a telescopic connecting rod and a centering protruding block, the first end of the telescopic connecting rod is connected with the engine side fixing disc, and the centering protruding block is arranged at the second end of the telescopic connecting rod. And the centering convex block is matched with the centering groove. By means of cooperation of the centering protruding block and the centering groove, the centering accuracy is improved, and the centering operation efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of engine testing, and in particular to an engine bench centering device and an engine bench testing device. Background Art

[0002] The alignment device for engine testing is used to ensure precise alignment between the engine and the test equipment to ensure accuracy and reliability during the test. Alignment is a critical step in engine testing because any misalignment may cause distortion of test results or damage to the equipment. With the continuous advancement of engine technology and the increase in testing needs, the alignment device is also constantly evolving and improving. The initial alignment device may be a simple mechanical calibration tool, such as a ruler and a support frame. As technology develops, more sophisticated alignment tools such as laser alignment instruments and optical measurement equipment have emerged. These tools are able to provide higher accuracy and stability, thus meeting the needs for engine testing precision and efficiency.

[0003] In the related art, pressure or impact is used to achieve a small displacement of the engine to adjust the alignment of the engine crankshaft flywheel and the dynamometer rotating shaft. This process is achieved by applying pressure or slight impact to the engine support unit to fine-tune the position of the engine. Technicians can use special tools or equipment, such as adjustment bolts or knocking tools, to accurately control this displacement.

[0004] However, the above-mentioned related technology, the tapping method may not provide sufficiently accurate displacement control, especially for situations where small adjustments are required. This may lead to inaccurate alignment and affect the accuracy of test results. And excessive tapping or applying inappropriate pressure may damage the engine or support unit, resulting in equipment damage or performance degradation, increasing maintenance costs and downtime. Utility Model Content

[0005] Based on this, it is necessary to provide an engine bench centering device and an engine bench testing device to address the technical problem of inaccurate alignment.

[0006] In a first aspect, the present application provides an engine stand centering device, comprising:

[0007] A dynamometer side fixing assembly, comprising a dynamometer side fixing plate and a limiting assembly, wherein the dynamometer side fixing plate is connected to the bench dynamometer device, and the limiting assembly is arranged on a side of the dynamometer side fixing plate facing away from the bench dynamometer device; wherein the limiting assembly comprises a centering groove, and the centering groove is arranged on the central axis of the dynamometer side fixing plate;

[0008] An engine side fixing assembly, comprising an engine side fixing plate and a centering adjustment assembly, wherein the engine side fixing plate is connected to the engine device, and the centering adjustment assembly is arranged on a side of the engine side fixing plate facing away from the engine device; wherein the centering adjustment assembly comprises a telescopic connecting rod and a centering convex block, wherein a first end of the telescopic connecting rod is connected to the engine side fixing plate, and the centering convex block is arranged at a second end of the telescopic connecting rod, and the centering convex block is arranged on the central axis of the telescopic connecting rod;

[0009] The centering protrusion cooperates with the centering groove.

[0010] In one embodiment, the end of the centering protrusion is a cone, and the centering groove is a conical groove.

[0011] In one embodiment, the limiting component further includes:

[0012] A limit plate is arranged in parallel with the dynamometer side fixed plate, the central axis of the limit plate and the central axis of the dynamometer side fixed plate are in the same straight line, and the centering groove is provided on a side of the limit plate facing away from the dynamometer side fixed plate;

[0013] A limiting connecting rod is vertically arranged on a side of the limiting plate facing the dynamometer side fixed plate, a first end of the limiting connecting rod is connected to the dynamometer side fixed plate, a second end of the limiting connecting rod is connected to the limiting plate, and the limiting connecting rod is arranged on the central axis of the limiting plate.

[0014] In one embodiment, the centering adjustment component further includes:

[0015] A centering adjustment disk, wherein the centering adjustment disk is arranged at the second end of the telescopic connecting rod, the telescopic connecting rod is perpendicular to the centering adjustment disk, and the centering protrusion passes through the centering adjustment disk;

[0016] A plurality of centering side plates are arranged at equal intervals on the side of the centering adjustment disk, and the plurality of centering side plates and the centering adjustment disk are in the same plane.

[0017] In one embodiment, each of the centering side plates is provided with a centering slot on a side facing the limiting plate, and the limiting plate is provided with a centering ridge on a side facing the centering side plate, and the centering ridge cooperates with the centering slot.

[0018] In one embodiment, the centering adjustment assembly further includes a plurality of positioning assemblies, and each of the centering side plates is provided with a positioning assembly on a side facing the limiting plate;

[0019] The positioning assembly includes a connecting plate and a centering needle. The first end of the connecting plate is connected to the centering side plate, and the centering needle is arranged on a side of the second end of the connecting plate facing the limiting plate.

[0020] In one of the embodiments, the centering side plate is provided with a sliding groove, and the positioning assembly includes a fixing bolt, the fixing bolt passes through the sliding groove, and the fixing bolt is connected to the connecting plate.

[0021] In one embodiment, the telescopic connecting rod includes a telescopic fixed rod, a telescopic movable rod and a fixing nut, the first end of the telescopic fixed rod is connected to the engine side fixing plate, and the fixing nut is arranged at the second end of the telescopic fixed rod;

[0022] The first end of the telescopic movable rod is embedded in the telescopic fixed rod, and the centering protrusion is arranged on the second end of the telescopic movable rod.

[0023] In one embodiment, a connecting block is provided at the end of the second end of the telescopic movable rod, and the connecting block is a U-shaped block. The side plate of the connecting block is connected to the end of the second end of the telescopic movable rod, the centering protrusion is provided on the transverse plate of the connecting block, and the centering adjustment disk is connected to the transverse plate of the connecting block.

[0024] In a second aspect, the present application also provides an engine bench test device, comprising an engine bench centering device as described in any one of the above.

[0025] The above-mentioned engine bench centering device and engine bench testing device are implemented by installing the dynamometer side fixing assembly on the bench dynamometer device and the engine side fixing assembly on the engine device before the engine bench test, and then adjusting the telescopic connecting rod of the centering adjustment assembly so that the centering adjustment assembly is close to the limit assembly, and adjusting the position of the bench dynamometer device or the engine device through the positional relationship between the centering protrusion of the centering adjustment assembly and the centering groove of the limit assembly until the centering protrusion is completely embedded in the centering groove, and the centering accuracy is improved by utilizing the cooperation between the centering protrusion and the centering groove, and the centering operation difficulty is reduced and the centering operation efficiency is improved based on the positional relationship between the centering protrusion and the centering groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic structural diagram of an engine stand centering device provided by an embodiment;

[0027] FIG2 is a schematic structural diagram of a dynamometer side fixing assembly provided by an embodiment;

[0028] FIG3 is a schematic structural diagram of an engine side fixing assembly provided by an embodiment;

[0029] FIG. 4 is a schematic structural diagram of an engine stand centering device provided in another embodiment.

[0030] Description of reference numerals:

[0031] 10- dynamometer side fixing assembly, 20- engine side fixing assembly;

[0032] 110- dynamometer side fixing plate, 120- limit assembly;

[0033] 121 - centering groove, 122 - limiting plate, 123 - limiting connecting rod, 124 - centering ridge;

[0034] 210-engine side fixing plate, 220-centering adjustment assembly, 230-telescopic connecting rod;

[0035] 221-centering protrusion, 222-centering adjustment disk, 223-centering side plate, 224-centering slot, 225-connecting plate, 226-centering needle, 227-sliding slot;

[0036] 231-telescopic fixed rod, 232-telescopic movable rod, 233-fixing nut, 234-connecting block. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0043] Refer to Figure 1, which shows a structural schematic diagram of an engine test bench centering device in an embodiment of the present application. The engine test bench centering device provided in an embodiment of the present application includes a dynamometer side fixing assembly 10 and an engine side fixing assembly 20. The dynamometer side fixing assembly 10 is connected to the test bench dynamometer device, and the engine side fixing assembly 20 is connected to the engine device.

[0044] Referring to FIG. 2 , FIG. 2 shows a schematic diagram of the structure of a dynamometer side fixing assembly 10 in an embodiment of the present application, wherein the dynamometer side fixing assembly 10 includes a dynamometer side fixing plate 110 and a limiting assembly 120, wherein the dynamometer side fixing plate 110 is connected to the bench dynamometer device, and the limiting assembly 120 is disposed on the side of the dynamometer side fixing plate 110 that faces away from the bench dynamometer device. The limiting assembly 120 includes a centering groove 121, which is disposed on the central axis of the dynamometer side fixing plate 110.

[0045] In one embodiment, fixing bolts are provided on the dynamometer-side fixing plate 110 , and the dynamometer-side fixing plate 110 is fixedly connected to the bench dynamometer device via the fixing bolts.

[0046] Referring to FIG. 3 , FIG. 3 shows a schematic diagram of the structure of the dynamometer side fixing assembly 10 in an embodiment of the present application, the engine side fixing assembly 20 includes an engine side fixing plate 210 and a centering adjustment assembly 220, the engine side fixing plate 210 is connected to the engine device, and the centering adjustment assembly 220 is arranged on the side of the engine side fixing plate 210 facing away from the engine device. The centering adjustment assembly 220 includes a telescopic link 230 and a centering protrusion 221, the first end of the telescopic link 230 is connected to the engine side fixing plate 210, the centering protrusion 221 is arranged at the second end of the telescopic link 230, and the centering protrusion 221 is arranged on the central axis of the telescopic link 230.

[0047] In one embodiment, fixing bolts are disposed on the engine side fixing plate 210 , and the engine side fixing plate 210 is fixedly connected to the engine device via the fixing bolts.

[0048] 1 to 3 , after the dynamometer-side fixing assembly 10 and the engine-side fixing assembly 20 are respectively installed on the bench dynamometer device and the engine device, the telescopic link 230 is adjusted so that the centering protrusion 221 at the second end of the telescopic link 230 is close to the centering groove 121 .

[0049] The centering adjustment distance can be preset, and then during the centering operation, when the centering protrusion 221 and the centering groove 121 reach the preset centering adjustment distance, the position between the centering protrusion 221 and the centering groove 121 can be observed to determine whether the central axis of the dynamometer side fixing assembly 10 and the central axis of the engine side fixing assembly 20 are in the same straight line. If they are not in the same straight line, the position and height of the engine device or the bench dynamometer device are adjusted based on the positional relationship between the centering protrusion 221 and the centering groove 121, so that the centering protrusion 221 can be completely embedded in the centering groove 121, even if the central axis of the dynamometer side fixing assembly 10 and the central axis of the engine side fixing assembly 20 are in the same straight line.

[0050] In one embodiment, the end of the centering protrusion 221 is a cone, and the centering groove 121 is a conical groove, so that precise adjustment can be performed by observing the contact between the cone and the conical groove.

[0051] In the above-mentioned engine bench centering device, before the engine bench test, the dynamometer side fixing assembly 10 is installed on the bench dynamometer device and the engine side fixing assembly 20 is installed on the engine device, and then the telescopic connecting rod 230 of the centering adjustment assembly 220 is adjusted so that the centering adjustment assembly 220 is close to the limit assembly 120, and the position of the bench dynamometer device or the engine device is adjusted by the positional relationship between the centering protrusion 221 of the centering adjustment assembly 220 and the centering groove 121 of the limit assembly 120 until the centering protrusion 221 is completely embedded in the centering groove 121, and the centering accuracy is improved by the cooperation between the centering protrusion 221 and the centering groove 121, and the centering operation difficulty is reduced and the centering operation efficiency is improved based on the positional relationship between the centering protrusion 221 and the centering groove 121.

[0052] Continuing to refer to FIG. 2 , the limiting assembly 120 further includes a limiting plate 122 and a limiting connecting rod 123. The limiting plate 122 is arranged in parallel with the dynamometer side fixed plate 110. The central axis of the limiting plate 122 is in the same straight line as the central axis of the dynamometer side fixed plate 110. The first end of the limiting connecting rod 123 is connected to the dynamometer side fixed plate 110. The second end of the limiting connecting rod 123 is connected to the limiting plate 122. The limiting connecting rod 123 is arranged on the central axis of the limiting plate 122. Among them, the centering groove 121 is provided on the side of the limiting plate 122 facing away from the dynamometer side fixed plate 110.

[0053] 3, the centering adjustment assembly 220 further includes a centering adjustment disk 222 and a plurality of centering side plates 223. The plurality of centering side plates 223 are arranged at equal intervals on the sides of the centering adjustment disk 222, and the plurality of centering side plates 223 and the centering adjustment disk 222 are in the same plane. In one embodiment, the plurality of centering side plates 223 and the centering adjustment disk 222 are an integrated structure.

[0054] Each centering side plate 223 is provided with a centering groove 224 on the side facing the limiting plate 122, and the limiting plate 122 is provided with a centering ridge 124 on the side facing the centering side plate 223. Continuing to refer to FIG. 3 , it can be seen that the centering ridge 124 is an annular structure and the cross section of the centering ridge 124 is V-shaped, while the centering groove 224 is an arc groove and the cross section of the centering groove 224 is V-shaped. The centering ridge 124 cooperates with the centering groove 224.

[0055] When performing the centering operation, in addition to observing the positional relationship between the centering protrusion 221 and the centering groove 121, the operator can also observe the positional relationship between each centering slot 224 and the centering ridge 124. Therefore, on the basis of the centering adjustment based on the positional relationship between the centering protrusion 221 and the centering groove 121, combined with the positional relationship between the centering slot 224 and the centering ridge 124, the accuracy of the operator's observation of the position is improved, thereby improving the accuracy of the centering adjustment and accelerating the centering efficiency.

[0056] In an exemplary embodiment, the telescopic connecting rod 230 includes a telescopic fixed rod 231, a telescopic movable rod 232 and a fixing nut 233. The first end of the telescopic fixed rod 231 is connected to the engine side fixed plate 210, and the fixing nut 233 is arranged at the second end of the telescopic fixed rod 231. The first end of the telescopic movable rod 232 is embedded in the telescopic fixed rod 231, and the centering protrusion 221 is arranged at the second end of the telescopic movable rod 232. In one embodiment, a connecting block 234 is arranged at the end of the second end of the telescopic movable rod 232, and the connecting block 234 is a U-shaped block, the side plate of the connecting block 234 is connected to the end of the second end of the telescopic movable rod 232, the centering protrusion 221 is arranged on the horizontal plate of the connecting block 234, and the centering adjustment plate 222 is connected to the horizontal plate of the connecting block 234.

[0057] After the dynamometer side fixing assembly 10 and the engine side fixing assembly 20 are installed on the bench dynamometer device and the engine device respectively, based on the distance between the dynamometer side fixing assembly 10 and the engine side fixing assembly 20, the telescopic movable rod 232 is moved along the central axis direction of the telescopic connecting rod 230, so that the centering protrusion 221 set at the second end of the telescopic movable rod approaches the centering groove 121 of the limit plate 122. When the centering protrusion 221 and the centering groove 121 reach the preset centering adjustment distance, the fixing nut 233 is rotated to make the telescopic movable rod 232 in a fixed state, thereby facilitating adjustment based on the current positional relationship between the centering protrusion 221 and the centering groove 121. After that, the operation of shortening the distance between the engine device and the bench dynamometer device and the centering adjustment operation is repeated until the central axis of the dynamometer side fixing assembly 10 and the central axis of the engine side fixing assembly 20 are in the same straight line.

[0058] As shown in FIG. 4 , FIG. 4 shows a schematic diagram of the structure of the engine side fixing assembly 20 in an embodiment of the present application. In some embodiments, the centering adjustment assembly 220 further includes a plurality of positioning assemblies, and each centering side plate 223 is provided with a positioning assembly on the side facing the limit plate 122. The positioning assembly includes a connecting plate 225 and a centering needle 226, the first end of the connecting plate 225 is connected to the centering side plate 223, and the centering needle 226 is provided on the side of the second end of the connecting plate 225 facing the limit plate 122. The centering side plate 223 is provided with a sliding groove 227, and the positioning assembly includes a fixing bolt, the fixing bolt passes through the sliding groove 227, and the fixing bolt is connected to the connecting plate 225.

[0059] When the centering protrusion 221 and the centering groove 121 reach the preset centering adjustment distance, the centering adjustment disk 222 is rotated so that the center needle completes a full circumference sweep of the center ridge 124. Then, the center axis of the dynamometer side fixing assembly 10 and the center axis of the engine side fixing assembly 20 are determined to be at a relatively close distance.

[0060] In an exemplary embodiment, referring to Figures 1 to 4, there are shown schematic diagrams of the structure of an engine bench centering device in an embodiment of the present application. The engine bench centering device includes a dynamometer side fixing assembly 10 and an engine side fixing assembly 20. The dynamometer side fixing assembly 10 is connected to the bench dynamometer device, and the engine side fixing assembly 20 is connected to the engine device.

[0061] The dynamometer side fixing assembly 10 includes a dynamometer side fixing plate 110 and a limiting assembly 120. The dynamometer side fixing plate 110 is connected to the bench dynamometer device, and the limiting assembly 120 is arranged on the side of the dynamometer side fixing plate 110 facing away from the bench dynamometer device.

[0062] The limiting assembly 120 includes a centering groove 121, a limiting plate 122 and a limiting connecting rod 123. The centering groove 121 is arranged on the central axis of the dynamometer side fixed plate 110. The limiting plate 122 is arranged in parallel with the dynamometer side fixed plate 110, and the central axis of the limiting plate 122 is in the same straight line as the central axis of the dynamometer side fixed plate 110. The first end of the limiting connecting rod 123 is connected to the dynamometer side fixed plate 110, and the second end of the limiting connecting rod 123 is connected to the limiting plate 122. The limiting connecting rod 123 is arranged on the central axis of the limiting plate 122.

[0063] The engine side fixing assembly 20 includes an engine side fixing plate 210 and a centering adjustment assembly 220 . The engine side fixing plate 210 is connected to the engine device, and the centering adjustment assembly 220 is arranged on a side of the engine side fixing plate 210 facing away from the engine device.

[0064] The centering adjustment assembly 220 includes a telescopic connecting rod 230, a centering protrusion 221, a centering adjustment disk 222, a plurality of centering side plates 223 and a plurality of positioning assemblies. The plurality of centering side plates 223 are arranged at equal intervals on the side of the centering adjustment disk 222, and the plurality of centering side plates 223 and the centering adjustment disk 222 are in the same plane, and the plurality of centering side plates 223 and the centering adjustment disk 222 are an integrated structure.

[0065] The first end of the telescopic link 230 is connected to the engine side fixed plate 210, and the centering protrusion 221 is arranged at the second end of the telescopic link 230, and the centering protrusion 221 is arranged on the central axis of the telescopic link 230. The engine side fixed plate 210 is provided with a fixing bolt, and the engine side fixed plate 210 is fixedly connected to the engine device through the fixing bolt. The telescopic link 230 includes a telescopic fixed rod 231, a telescopic movable rod 232 and a fixing nut 233. The first end of the telescopic fixed rod 231 is connected to the engine side fixed plate 210, and the fixing nut 233 is arranged at the second end of the telescopic fixed rod 231. The first end of the telescopic movable rod 232 is embedded in the telescopic fixed rod 231, and the centering protrusion 221 is arranged at the second end of the telescopic movable rod 232. A connecting block 234 is provided at the end of the second end of the telescopic movable rod 232. The connecting block 234 is a U-shaped block. The side plate of the connecting block 234 is connected to the end of the second end of the telescopic movable rod 232. The centering protrusion 221 is provided on the transverse plate of the connecting block 234, and the centering adjustment disk 222 is connected to the transverse plate of the connecting block 234.

[0066] Each centering side plate 223 is provided with a centering groove 224 on the side facing the limiting plate 122, and the limiting plate 122 is provided with a centering ridge 124 on the side facing the centering side plate 223. The centering ridge 124 is an annular structure and the cross section of the centering ridge 124 is V-shaped, while the centering groove 224 is an arc groove and the cross section of the centering groove 224 is V-shaped.

[0067] Each centering side plate 223 is provided with a positioning assembly on the side facing the limiting plate 122. The positioning assembly includes a connecting plate 225 and a centering needle 226. The first end of the connecting plate 225 is connected to the centering side plate 223, and the centering needle 226 is provided on the side of the second end of the connecting plate 225 facing the limiting plate 122. The centering side plate 223 is provided with a sliding groove 227, and the positioning assembly includes a fixing bolt, which passes through the sliding groove 227 and is connected to the connecting plate 225.

[0068] The end of the centering protrusion 221 is a cone, the centering groove 121 is a conical groove, and the centering groove 121 is provided on a side of the limiting plate 122 facing away from the dynamometer-side fixing plate 110 .

[0069] When performing the centering operation, coarse adjustment and fine adjustment are required.

[0070] When performing a coarse adjustment operation, the telescopic movable rod 232 of the telescopic connecting rod 230 is extended along the central axis direction of the telescopic connecting rod 230 until the centering side plate 223 is close to the limit plate 122 and the centering needle 226 is located on the side of the limit plate 122. The fixing nut 233 is rotated to fix the telescopic movable rod 232, and then the centering adjustment plate 222 is rotated to make the center needle sweep the center convex ridge 124 in a complete circle.

[0071] After the middle scratching needle has swept the middle ridge 124 around a complete circle, the positioning assembly on the centering side plate 223 is removed.

[0072] When performing fine adjustment, shorten the distance between the engine device and the bench dynamometer, observe the positional relationship between the centering protrusion 221 and the centering groove 121, and the positional relationship between each centering slot 224 and the centering ridge 124, and then adjust the position and height of the engine device or the bench dynamometer. Repeat the shortening of the distance between the engine device and the bench dynamometer and the centering adjustment operation until the centering protrusion 221 is completely embedded in the centering groove 121 and the centering ridge 124 is completely embedded in each centering slot 224. At this time, the central axis of the dynamometer side fixing assembly 10 and the central axis of the engine side fixing assembly 20 are in the same straight line.

[0073] Observe the positional relationship between the centering needle 226 and the centering ridge 124, the positional relationship between the centering block and the centering groove 121, and the positional relationship between each centering slot 224 and the centering ridge 124, and then adjust the position and height of the engine device or the bench dynamometer device. Perform the centering adjustment operation based on the three positional relationships to improve the centering accuracy.

[0074] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An engine stand centering device, characterized in that: include: A dynamometer side fixing assembly, comprising a dynamometer side fixing plate and a limiting assembly, wherein the dynamometer side fixing plate is connected to the bench dynamometer device, and the limiting assembly is arranged on a side of the dynamometer side fixing plate facing away from the bench dynamometer device; wherein the limiting assembly comprises a centering groove, and the centering groove is arranged on the central axis of the dynamometer side fixing plate; An engine side fixing assembly, comprising an engine side fixing plate and a centering adjustment assembly, wherein the engine side fixing plate is connected to the engine device, and the centering adjustment assembly is arranged on a side of the engine side fixing plate facing away from the engine device; wherein the centering adjustment assembly comprises a telescopic connecting rod and a centering convex block, wherein a first end of the telescopic connecting rod is connected to the engine side fixing plate, and the centering convex block is arranged at a second end of the telescopic connecting rod, and the centering convex block is arranged on the central axis of the telescopic connecting rod; The centering protrusion cooperates with the centering groove.

2. The engine stand centering device according to claim 1, characterized in that: The end of the centering protrusion is a cone, and the centering groove is a conical groove.

3. The engine stand centering device according to claim 1, characterized in that: The limiting component also includes: A limit plate is arranged in parallel with the dynamometer side fixed plate, the central axis of the limit plate and the central axis of the dynamometer side fixed plate are in the same straight line, and the centering groove is provided on a side of the limit plate facing away from the dynamometer side fixed plate; A limiting connecting rod is vertically arranged on a side of the limiting plate facing the dynamometer side fixed plate, a first end of the limiting connecting rod is connected to the dynamometer side fixed plate, a second end of the limiting connecting rod is connected to the limiting plate, and the limiting connecting rod is arranged on the central axis of the limiting plate.

4. The engine stand centering device according to claim 3, characterized in that: The centering adjustment assembly also includes: A centering adjustment disk, wherein the centering adjustment disk is arranged at the second end of the telescopic connecting rod, the telescopic connecting rod is perpendicular to the centering adjustment disk, and the centering protrusion passes through the centering adjustment disk; A plurality of centering side plates are arranged at equal intervals on the side of the centering adjustment disk, and the plurality of centering side plates and the centering adjustment disk are in the same plane.

5. The engine stand centering device according to claim 4, characterized in that: Each of the centering side plates is provided with a centering slot on a side facing the limiting plate, and the limiting plate is provided with a centering ridge on a side facing the centering side plate, and the centering ridge cooperates with the centering slot.

6. The engine stand centering device according to claim 4, characterized in that: The centering adjustment assembly further includes a plurality of positioning assemblies, and each centering side plate is provided with a positioning assembly on a side facing the limiting plate; The positioning assembly includes a connecting plate and a centering needle. The first end of the connecting plate is connected to the centering side plate, and the centering needle is arranged on a side of the second end of the connecting plate facing the limiting plate.

7. The engine stand centering device according to claim 6, characterized in that: The centering side plate is provided with a sliding groove, and the positioning assembly includes a fixing bolt, the fixing bolt passes through the sliding groove, and the fixing bolt is connected to the connecting plate.

8. The engine stand centering device according to claim 4, characterized in that: The telescopic connecting rod comprises a telescopic fixing rod, a telescopic movable rod and a fixing nut, the first end of the telescopic fixing rod is connected to the engine side fixing plate, and the fixing nut is arranged at the second end of the telescopic fixing rod; The first end of the telescopic movable rod is embedded in the telescopic fixed rod, and the centering protrusion is arranged on the second end of the telescopic movable rod.

9. The engine stand centering device according to claim 8, characterized in that: A connecting block is provided at the end of the second end of the telescopic movable rod, and the connecting block is a U-shaped block. The side plate of the connecting block is connected to the end of the second end of the telescopic movable rod, the centering protrusion is provided on the transverse plate of the connecting block, and the centering adjustment disk is connected to the transverse plate of the connecting block.

10. An engine bench test device, characterized in that: The invention comprises an engine stand centering device as claimed in any one of claims 1 to 9.

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