Engine testing apparatus and method of operation thereof

Abstract

The present application belongs to the technical field of testing, and particularly relates to testing of an engine, and more particularly to an engine testing device and a working method thereof, wherein the engine testing device slows down the closing speed through the elastic collision avoidance assembly before the first magnetic suction disc and the second magnetic suction disc are attracted and closed together when the driving device is connected through the first connecting disc and the second connecting disc; meanwhile, the engine testing device forms a wedge-shaped cooperation through the tensioning assembly to be tensioned, thereby realizing stable connection of the output shaft and the crankshaft.

Description

Technical Field

[0001] This invention belongs to the field of testing technology, specifically relating to engine testing, and more particularly to an engine testing device and its working method. Background Technology

[0002] In the diesel engine manufacturing industry, final inspection and testing of the entire engine is an irreplaceable and essential step. Traditionally, engines are connected using a three-jaw connecting plate with a rubber block in the middle and a steel plate directly underneath to solve the connection problem for different models. During testing, it is not easy to align the center, and the pad is prone to slippage due to vibration, increasing the danger of the testing process. By setting magnetic disks with opposite poles on the two connecting plates, the two disks are connected by magnetic attraction. However, collisions between the two disks can damage the disks, making it impossible to connect the connecting plates stably. In addition, to facilitate the connection between the two connecting plates, the size of the pin on one connecting plate is slightly smaller than the insertion hole on the other connecting plate. When the two connecting plates are connected, the gap between the pin and the inner wall of the insertion hole causes the connection between the two connecting plates to be unstable. This leads to vibration when the output shaft of the drive unit drives the crankshaft to rotate, resulting in errors in engine testing.

[0003] Therefore, in order to solve the technical problem of engine testing errors caused by unstable connection between the drive unit and the engine, it is necessary to design an engine testing device and its working method.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0005] This disclosure provides at least one engine testing device and its operating method.

[0006] In a first aspect, embodiments of this disclosure provide an engine testing apparatus, including: A control module, and a drive device and a detection device electrically connected to the control module; The drive unit is connected to the engine via a connecting mechanism, and the detection device is connected to the engine. The control module is configured to control the drive device to rotate the crankshaft of the engine before the engine starts, and simultaneously control the detection device to detect the engine, and to control the detection device to detect the engine after the engine starts. The connecting mechanism includes: a first magnetic chuck connected to a first connecting plate, and a second magnetic chuck connected to a second connecting plate; The first connecting plate is equipped with a tensioning component, and the second connecting plate is equipped with an elastic collision avoidance component; When the first connecting plate and the second connecting plate are connected, before the first magnetic chuck and the second magnetic chuck are attracted and closed, the closing speed is slowed down by the elastic collision avoidance component; at the same time, the tensioning component forms a wedge fit to tighten.

[0007] In one alternative implementation, the tensioning component includes: a plurality of protrusions; The first connecting disc is sleeved on the crankshaft of the engine; The first magnetic chuck is surrounded by several protrusions, and each protrusion is provided with a post on its outer side, and each post is fitted with a wear-resistant sleeve. The bump is made of a flexible material; The protrusion has a ramp on the side closest to the first magnetic chuck.

[0008] In one alternative embodiment, the resilient collision avoidance assembly includes: a spring and a collision avoidance ring; The second connecting plate is sleeved on the output shaft of the drive device; a spring and a collision avoidance ring are arranged around the second magnetic chuck. When the first connecting plate and the second connecting plate are not connected, the spring causes the collision avoidance ring to protrude from the surface of the second magnetic chuck; and the second connecting plate has a plurality of insertion holes corresponding to the insertion posts at equal intervals along its circumference, and the insertion holes are provided with protrusion receiving grooves.

[0009] In one alternative implementation, when the output shaft of the drive unit is close to the crankshaft of the engine, before the first magnetic chuck and the second magnetic chuck are attracted and closed, the protrusion presses against the outer wall of the wear-resistant sleeve after abutting against the collision avoidance ring, and forces the spring to compress and buffer to slow down the closing speed.

[0010] In one optional embodiment, when the first magnetic chuck and the second magnetic chuck are attracted to each other, one end of the insert protrudes from the corresponding insertion hole, and the protrusion is located in the corresponding receiving groove. The first connecting plate and the second connecting plate are connected, thereby connecting the output shaft and the crankshaft. At the same time, after the protrusion fits against the outer wall of the wear-resistant sleeve, it enters the insertion hole, and the protrusion and the receiving groove form a wedge fit to tighten.

[0011] In one alternative embodiment, the engine is connected to a support plate, and the bottom of the support plate is provided with a plurality of lifting cylinders that are electrically connected to the control module. The control module is configured to control the lifting cylinder to move the support plate up and down, thereby moving the engine up and down, so that the first magnetic chuck and the second magnetic chuck are aligned.

[0012] In one optional embodiment, the driving device includes: a drive motor electrically connected to the control module; The second connecting disc is sleeved on the output shaft connected to the drive motor; The drive motor is connected to the moving mechanism, and the moving mechanism is electrically connected to the control module; The control module is configured to control the moving mechanism to move the drive motor, thereby bringing the output shaft closer to the engine crankshaft; and After the output shaft is connected to the crankshaft, the control module is configured to control the drive motor to work and drive the crankshaft to rotate through the output shaft.

[0013] Secondly, embodiments of this disclosure also provide a method for operating the engine testing equipment described above, comprising: When the first connecting plate and the second connecting plate are connected, before the first magnetic chuck and the second magnetic chuck are attracted and closed, the closing speed is slowed down by the elastic collision avoidance component; at the same time, the tensioning component forms a wedge fit to tighten.

[0014] In one alternative implementation, when the output shaft of the drive unit is close to the crankshaft of the engine, before the first magnetic chuck and the second magnetic chuck are attracted and closed, the protrusion presses against the outer wall of the wear-resistant sleeve after abutting against the collision avoidance ring, and forces the spring to compress and buffer to slow down the closing speed.

[0015] In one optional embodiment, when the first magnetic chuck and the second magnetic chuck are attracted to each other, one end of the insert protrudes from the corresponding insertion hole, and the protrusion is located in the corresponding receiving groove. The first connecting plate and the second connecting plate are connected, thereby connecting the output shaft and the crankshaft. At the same time, after the protrusion fits against the outer wall of the wear-resistant sleeve, it enters the insertion hole, and the protrusion and the receiving groove form a wedge fit to tighten.

[0016] The beneficial effect of this invention is that, when the first connecting plate and the second connecting plate are connected, the first magnetic chuck and the second magnetic chuck are attracted and closed by the elastic collision avoidance component to slow down the closing speed; at the same time, the tensioning component forms a wedge fit to tighten, thereby achieving a stable connection between the output shaft and the crankshaft.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an engine testing device provided in an embodiment of the present disclosure; Figure 2 This is a schematic diagram of a connecting mechanism provided in an embodiment of the present disclosure; Figure 3 This is a schematic diagram of the structure of an insert provided in an embodiment of the present disclosure; Figure 4 A schematic diagram of a connection state provided in an embodiment of this disclosure; Figure 5 A cross-sectional view of a connection state provided in an embodiment of this disclosure; Figure 6 for Figure 5 An enlarged schematic diagram of part A in the middle; Figure 7 This is a cross-sectional view of a separated state provided in an embodiment of this disclosure.

[0021] In the picture: Drive unit 1, output shaft 11, drive motor 12; Connecting mechanism 2, tensioning assembly 21, first magnetic chuck 211, protrusion 212, ramp 213, insertion post 214, wear-resistant sleeve 215, first connecting plate 216, elastic collision avoidance assembly 22, second magnetic chuck 221, collision avoidance ring 222, spring 223, insertion hole 224, receiving groove 225, second connecting plate 226; Engine 3, support plate 31; Detection device 4, pipeline 41. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0024] In the diesel engine manufacturing industry, final inspection and testing of the entire engine is an irreplaceable and essential step. Traditionally, engines are connected using a three-jaw connecting plate with a rubber block in the middle and a steel plate directly underneath to solve the connection problem for different models. During testing, it is not easy to align the center, and the pad is prone to slippage due to vibration, increasing the danger of the testing process. By setting magnetic disks with opposite poles on the two connecting plates, the two disks are connected by magnetic attraction. However, collisions between the two disks can damage the disks, making it impossible to connect the connecting plates stably. In addition, to facilitate the connection between the two connecting plates, the size of the pin on one connecting plate is slightly smaller than the insertion hole on the other connecting plate. When the two connecting plates are connected, the gap between the pin and the inner wall of the insertion hole causes the connection between the two connecting plates to be unstable. This leads to vibration when the output shaft of the drive unit drives the crankshaft to rotate, resulting in errors in engine testing.

[0025] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] like Figure 1 , Figure 2 and Figure 3As shown, at least one disclosed embodiment provides an engine testing device, including: a control module, and a drive device 1 and a detection device 4 electrically connected to the control module; the drive device 1 is connected to an engine 3 via a connecting mechanism 2, and the detection device 4 is connected to the engine 3; the control module is configured to control the drive device 1 to drive the crankshaft of the engine 3 to rotate before the engine 3 starts, and simultaneously control the detection device 4 to detect, and to control the detection device 4 to detect the engine 3 after the engine 3 starts; the connecting mechanism 2 includes: a first magnetic chuck 211 connected to a first connecting plate 216, and a second magnetic chuck 221 connected to a second connecting plate 226; a tensioning component 21 is provided on the first connecting plate 216, and an elastic collision avoidance component 22 is provided on the second connecting plate 226; when the first connecting plate 216 and the second connecting plate 226 are connected, before the first magnetic chuck 211 and the second magnetic chuck 221 are attracted and closed, the closing speed is slowed down by the elastic collision avoidance component 22; at the same time, the tensioning component 21 forms a wedge fit to tighten, thereby realizing a stable connection between the output shaft 11 and the crankshaft.

[0027] In this embodiment, the magnetic poles of the first magnetic chuck 211 and the second magnetic chuck 221 are opposite.

[0028] In this embodiment, in the initial state, the output shaft 11 is not connected to the crankshaft, the first connecting plate 216 and the second connecting plate 226 are far apart, a portion of the inner wall of the collision avoidance ring 222 surrounds the second magnetic chuck 221, and a portion of the collision avoidance ring 222 protrudes from the second magnetic chuck 221. When the second connecting plate 226 approaches the first connecting plate 216, between the adsorption of the first magnetic chuck 211 and the second magnetic chuck 221, the protrusion 212 can first contact and squeeze the collision avoidance ring 222. By squeezing the collision avoidance ring 222 through the protrusion 212, the spring 223 is compressed, avoiding collisions between the first magnetic chuck 211 and the second magnetic chuck 221, and preventing damage to the first magnetic chuck 211 and the second magnetic chuck 221. This ensures a stable connection between the first connecting plate 216 and the second connecting plate 226, so that the crankshaft and the output shaft 11 can be stably connected.

[0029] like Figure 3 As shown, in one optional embodiment, the tensioning assembly 21 includes: a plurality of protrusions 212; the first connecting disc 216 is sleeved on the crankshaft of the engine 3; a plurality of protrusions 212 are arranged around the first magnetic chuck 211, and each protrusion 212 is provided with a post 214 evenly distributed on its outer side, and each post 214 is fitted with a wear-resistant sleeve 215; the protrusions 212 are made of flexible material; and a slope 213 is provided on the side of the protrusion 212 near the first magnetic chuck 211.

[0030] In this embodiment, when the output shaft 11 needs to be connected to the crankshaft, the engine 3 remains stationary, and the output shaft 11 moves closer to the crankshaft, causing the second connecting plate 226 to move closer to the first connecting plate 216. The ramp 213 of the protrusion 212 contacts the edge of the collision avoidance ring 222. As the second connecting plate 226 continues to move, the collision avoidance ring 222 pushes the protrusion 212 towards the insertion post 214, so that the protrusion 212 can contact the wear-resistant sleeve 215 outside the corresponding insertion post 214, and facilitate the protrusion 212 to be inserted more smoothly into the corresponding receiving groove 225.

[0031] like Figure 2 As shown, in an optional embodiment, the elastic collision avoidance assembly 22 includes: a spring 223 and a collision avoidance ring 222; the second connecting disk 226 is sleeved on the output shaft 11 of the drive device 1; the second magnetic chuck 221 is surrounded by the spring 223 and the collision avoidance ring 222, and when the first connecting disk 216 and the second connecting disk 226 are not connected, the spring 223 causes the collision avoidance ring 222 to protrude from the surface of the second magnetic chuck 221; and the second connecting disk 226 is provided with a plurality of insertion holes 224 corresponding to the insertion posts 214 at equal intervals along its circumference, and the insertion holes 224 are provided with protrusions 212 and receiving grooves 225.

[0032] In this embodiment, the receiving groove 225 can be used to receive the protrusion 212 so that the protrusion 212 enters the corresponding receiving groove 225 to form a wedge fit to achieve tension, thereby ensuring a stable connection between the output shaft 11 and the crankshaft when the output shaft 11 drives the crankshaft to rotate, by inserting the protrusion 21 into the receiving groove 225.

[0033] like Figure 4 and Figure 5 As shown, in this embodiment, when the first connecting plate 216 is connected to the second connecting plate 226, one end of the plug 214 extends from the end of the socket 224 away from the first connecting plate 216, ensuring a stable connection between the plug 214 and the socket 224.

[0034] like Figure 6 and Figure 7 As shown, in this embodiment, the protrusion 212 can be wedge-shaped to facilitate the insertion of the protrusion 212 into the corresponding receiving groove 225. Figure 7 This is a schematic diagram showing that the protrusion 212 is not inserted into the receiving groove 225. Figure 6 This is a schematic diagram of the state of the protrusion 212 inserted into the receiving groove 225. After the protrusion 212 is inserted into the receiving groove 225, the side wall of the protrusion 212 contacts the inner wall of the receiving groove 225 to complete the wedge fit and achieve tension.

[0035] In one alternative embodiment, when the output shaft 11 of the drive unit 1 approaches the crankshaft of the engine 3, before the first magnetic chuck 211 and the second magnetic chuck 221 are attracted and closed, the protrusion 212 and the collision avoidance ring 222 abut against each other and press against the outer wall of the wear-resistant sleeve 215, and force the spring 223 to compress and buffer to slow down the closing speed.

[0036] In one optional embodiment, when the first magnetic chuck 211 and the second magnetic chuck 221 are attracted, one end of the insertion post 214 extends out of the corresponding insertion hole 224, and the protrusion 212 is located in the corresponding receiving groove 225. The first connecting plate 216 and the second connecting plate 226 are connected, thereby connecting the output shaft 11 to the crankshaft. At the same time, after the protrusion 212 fits against the outer wall of the wear-resistant sleeve 215, it enters the insertion hole 224. The protrusion 212 and the receiving groove 225 form a wedge-shaped fit to tighten.

[0037] like Figure 1 As shown, in one optional embodiment, the engine 3 is connected to the support plate 31, and the bottom of the support plate 31 is provided with a plurality of lifting cylinders electrically connected to the control module; since the lifting cylinders are obscured, they are not shown in the figure; the control module is configured to control the lifting cylinders to drive the support plate 31 to move up and down, so as to drive the engine 3 to move up and down, thereby making the first magnetic chuck 211 and the second magnetic chuck 221 aligned.

[0038] In this embodiment, when it is necessary to connect the output shaft 11 and the crankshaft, the control module first controls the lifting cylinder to drive the engine 3 to rise and fall, so as to adjust the position of the engine 3 and make the first magnetic chuck 211 and the second magnetic chuck 221 aligned, which facilitates the subsequent stable connection. Adjusting the position of the engine 3 by the lifting cylinder can adapt to engines 3 of different sizes, which is convenient for testing engines 3 of various sizes.

[0039] In one optional embodiment, the drive device 1 includes: a drive motor 12 electrically connected to the control module; a second connecting plate 226 sleeved on the output shaft 11 connected to the drive motor 12; the drive motor 12 is connected to a moving mechanism, and the moving mechanism is electrically connected to the control module; the moving mechanism is not shown in the figure due to obstruction; the moving mechanism may be composed of a lead screw motor and other auxiliary components; the control module is configured to control the moving mechanism to drive the drive motor 12 to move, so as to drive the output shaft 11 closer to the crankshaft of the engine 3; and after the output shaft 11 is connected to the crankshaft, the control module is configured to control the drive motor 12 to work, thereby driving the crankshaft to rotate through the output shaft 11.

[0040] In this embodiment, when the output shaft 11 is connected to the crankshaft, the engine 3 remains separate. The moving mechanism drives the drive motor 12 to move closer to the engine 3, so that the second connecting plate 226 can move towards the first connecting plate 216.

[0041] In this embodiment, multiple pipes 41 can be provided on the engine 3 to correspond to the oil inlet, oil return, air intake, and exhaust gas emission of the engine 3.

[0042] In this embodiment, the detection device 4 may include a whole machine airtightness testing mechanism, which adopts an external cylinder constant pressure test. The intake and exhaust pipes 41 are closed respectively. The control module controls the cylinder to rise and seal the oil observation port. The pressure device is started to pressurize the whole machine cavity and check the airtightness of the whole machine (engine 3). After the airtightness test is completed, the intake and exhaust pipes 41 are reset and opened. The cylinder remains in its original position. The pipe 41 is switched to the whole machine negative pressure testing pipe 41 to monitor the fluctuation of the internal cavity negative pressure during the operation of the whole machine.

[0043] In this embodiment, the detection device 4 may include an intake air detection module to ensure the cleanliness of the intake air while analyzing and evaluating the overall performance of the engine based on the stability and flow rate of the intake air during engine operation.

[0044] In this embodiment, the detection device 4 may include an intake detection module and an exhaust gas comprehensive treatment module, which monitor the exhaust of the whole machine and effectively treat the exhaust gas to reduce the emission of exhaust pollutants, laying a solid foundation for energy conservation and emission reduction.

[0045] In this embodiment, the detection device 4 may include an ECU comprehensive analysis module. This module may be electrically connected to a host computer or directly installed in the host computer to systematically analyze the real-time parameters collected during the testing of all modules, so as to ensure the continuous stability and reliability of the overall performance of the machine.

[0046] In this embodiment, the control module can be integrated into the host computer to facilitate the control of various mechanisms and modules.

[0047] At least one disclosed embodiment also provides a method of operating the engine testing equipment described above, including: when the first connecting plate 216 and the second connecting plate 226 are connected, before the first magnetic chuck 211 and the second magnetic chuck 221 are attracted and closed, the closing speed is slowed down by the elastic collision avoidance component 22; at the same time, the tensioning component 21 forms a wedge fit to tighten.

[0048] In one alternative embodiment, when the output shaft 11 of the drive unit 1 approaches the crankshaft of the engine 3, before the first magnetic chuck 211 and the second magnetic chuck 221 are attracted and closed, the protrusion 212 and the collision avoidance ring 222 abut against each other and press against the outer wall of the wear-resistant sleeve 215, and force the spring 223 to compress and buffer to slow down the closing speed.

[0049] In one optional embodiment, when the first magnetic chuck 211 and the second magnetic chuck 221 are attracted, one end of the insertion post 214 extends out of the corresponding insertion hole 224, and the protrusion 212 is located in the corresponding receiving groove 225. The first connecting plate 216 and the second connecting plate 226 are connected, thereby connecting the output shaft 11 to the crankshaft. At the same time, after the protrusion 212 fits against the outer wall of the wear-resistant sleeve 215, it enters the insertion hole 224. The protrusion 212 and the receiving groove 225 form a wedge-shaped fit to tighten.

[0050] In summary, this engine testing equipment achieves a stable connection between the output shaft 11 and the crankshaft by using the elastic collision avoidance component 22 to slow down the closing speed of the first magnetic chuck 211 and the second magnetic chuck 221 before they are attracted and closed when the first connecting plate 216 and the second connecting plate 226 are connected; at the same time, the tensioning component 21 forms a wedge fit to tighten the connection.

[0051] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0052] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0053] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “under” other elements or features would be oriented as “above” other elements or features.

[0054] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An engine testing device, characterized in that, include: A control module, and a drive device (1) and a detection device (4) electrically connected to the control module. The drive device (1) is connected to the engine (3) via the connecting mechanism (2), and the detection device (4) is connected to the engine (3); The control module is configured to control the drive device (1) to drive the crankshaft of the engine (3) to rotate before the engine (3) is started, and simultaneously control the detection device (4) to detect, and control the detection device (4) to detect the engine (3) after the engine (3) is started. The connecting mechanism (2) includes: a first magnetic chuck (211) connected to the first connecting disk (216), and a second magnetic chuck (221) connected to the second connecting disk (226). The first connecting plate (216) is provided with a tensioning component (21), and the second connecting plate (226) is provided with an elastic collision avoidance component (22). When the first connecting plate (216) and the second connecting plate (226) are connected, before the first magnetic chuck (211) and the second magnetic chuck (221) are attracted and closed, the closing speed is slowed down by the elastic collision avoidance component (22); at the same time, the tensioning component (21) forms a wedge fit to tighten; The tensioning component (21) includes: a plurality of protrusions (212); The first connecting disc (216) is fitted onto the crankshaft of the engine (3); The first magnetic chuck (211) is surrounded by a number of protrusions (212), and each protrusion (212) is provided with a post (214) on its outer side, and each post (214) is fitted with a wear-resistant sleeve (215). The bump (212) is made of a flexible material; The protrusion (212) has a ramp (213) on the side near the first magnetic chuck (211); The elastic collision avoidance assembly (22) includes: a spring (223) and a collision avoidance ring (222); The second connecting plate (226) is sleeved on the output shaft (11) of the drive device (1); the second magnetic chuck (221) is surrounded by a spring (223) and a collision avoidance ring (222). When the first connecting plate (216) and the second connecting plate (226) are not connected, the spring (223) causes the collision avoidance ring (222) to protrude from the surface of the second magnetic chuck (221); and the second connecting plate (226) is provided with a plurality of insertion holes (224) corresponding to the insertion post (214) at equal intervals along its circumference, and the insertion holes (224) are provided with a protrusion (212) for receiving groove (225).

2. The engine testing equipment as described in claim 1, characterized in that: When the output shaft (11) of the drive unit (1) approaches the crankshaft of the engine (3), before the first magnetic chuck (211) and the second magnetic chuck (221) are attracted and closed, the protrusion (212) and the collision avoidance ring (222) press against each other and adhere to the outer wall of the wear-resistant sleeve (215), and force the spring (223) to compress and buffer to slow down the closing speed.

3. The engine testing equipment as described in claim 1, characterized in that: When the first magnetic chuck (211) and the second magnetic chuck (221) are attracted, one end of the plug (214) extends out of the corresponding insertion hole (224), and the protrusion (212) is located in the corresponding receiving groove (225). The first connecting plate (216) and the second connecting plate (226) are connected, thereby connecting the output shaft (11) with the crankshaft. At the same time, the protrusion (212) fits into the outer wall of the wear-resistant sleeve (215) and enters the insertion hole (224). The protrusion (212) and the receiving groove (225) form a wedge fit to tighten.

4. The engine testing equipment as described in claim 1, characterized in that: The engine (3) is connected to the support plate (31), and the bottom of the support plate (31) is provided with a number of lifting cylinders that are electrically connected to the control module; The control module is configured to control the lifting cylinder to drive the support plate (31) to move up and down, thereby driving the engine (3) to move up and down, so that the first magnetic chuck (211) and the second magnetic chuck (221) are aligned.

5. The engine testing equipment as described in claim 1, characterized in that: The drive device (1) includes: a drive motor (12) electrically connected to the control module. The second connecting disc (226) is sleeved on the output shaft (11) connected to the drive motor (12); The drive motor (12) is connected to the moving mechanism, and the moving mechanism is electrically connected to the control module; The control module is configured to control the moving mechanism to move the drive motor (12) so as to move the output shaft (11) closer to the crankshaft of the engine (3); and After the output shaft (11) is connected to the crankshaft, the control module is configured to control the drive motor (12) to work and drive the crankshaft to rotate through the output shaft (11).

6. A method for operating the engine testing equipment as described in claim 1, characterized in that, include: When the first connecting plate (216) and the second connecting plate (226) are connected, the closing speed is slowed down by the elastic collision avoidance component (22) before the first magnetic chuck (211) and the second magnetic chuck (221) are attracted and closed; at the same time, the wedge-shaped fit is formed by the tensioning component (21) to tighten.

7. The working method as described in claim 6, characterized in that: When the output shaft (11) of the drive unit (1) approaches the crankshaft of the engine (3), before the first magnetic chuck (211) and the second magnetic chuck (221) are attracted and closed, the protrusion (212) and the collision avoidance ring (222) press against each other and stick to the outer wall of the wear-resistant sleeve (215), and force the spring (223) to compress and buffer to slow down the closing speed.

8. The working method as described in claim 6, characterized in that: When the first magnetic chuck (211) and the second magnetic chuck (221) are attracted, one end of the plug (214) extends out of the corresponding insertion hole (224), and the protrusion (212) is located in the corresponding receiving groove (225). The first connecting plate (216) and the second connecting plate (226) are connected, thereby connecting the output shaft (11) with the crankshaft. At the same time, the protrusion (212) fits into the outer wall of the wear-resistant sleeve (215) and enters the insertion hole (224). The protrusion (212) and the receiving groove (225) form a wedge fit to tighten.

Images