Detection device for phase lift of engine

Abstract

The utility model discloses an engine phase lift detection device, which comprises a dial indicator, a dial plate and a pointer, a contact rod of the dial indicator is in contact connection with a valve tappet or a piston, the pointer and the dial plate are correspondingly arranged, the dial plate is fixedly connected with a crankshaft, and the axis of the dial plate and the central axis of the crankshaft are collinear. Scales are annularly and uniformly distributed on the dial plate; the pointer is matched with the scales to indicate the rotation angle of the dial plate; according to the utility model, the dial indicator and the dial plate are arranged at the same time, the dial plate is matched with the pointer to monitor the rotation angle of the crankshaft in real time, and the dial indicator is used for monitoring the stroke position of the valve tappet in real time, so that the corresponding relation between the valve lift and the crankshaft angle in actual use can be detected; the opening and closing time and the opening and closing size of the air inflow can be effectively controlled on the basis of detection data detected by the air inflow control device.

Description

Technical Field

[0001] The utility model relates to the technical field of engine detection, in particular to a detection device for engine phase lift. Background Art

[0002] The engine valve mechanism controls the opening and closing timing and size of the intake volume. The phase error affects the engine's power, economy and emission indicators. Therefore, the phase angle and valve lift size are important characteristics of the engine and need to be strictly controlled.

[0003] Existing detection devices can generally only detect the phase angle and lift of the camshaft in the engine as control indicators. However, due to the influence of the internal assembly structure and control response of the engine, the parameters that really need to be strictly controlled during the actual operation of the engine should still be the corresponding relationship between the valve lift and the crankshaft angle. This still has a certain error with the phase angle and lift parameters of the camshaft. Therefore, the existing detection devices cannot effectively detect the important parameters such as the phase angle and the lift size of the valve, and cannot effectively control the opening and closing time and opening and closing size of the intake volume based on the detection data.

[0004] In view of the above defects, the inventor of the present invention finally obtained the present invention after a long period of research and practice. Utility Model Content

[0005] In order to solve the technical defects, the technical solution adopted by the utility model is to provide an engine phase lift detection device for detecting an engine, wherein the engine comprises a piston, a valve tappet, a camshaft and a crankshaft, wherein the crankshaft drives the piston to reciprocate, the camshaft is drivingly connected to the valve tappet, and the camshaft is drivingly connected to the crankshaft;

[0006] The engine phase lift detection device includes a dial indicator, a dial and a pointer. The contact rod of the dial indicator is in contact with the valve tappet or the piston. The pointer and the dial are correspondingly arranged. The dial is fixedly connected to the crankshaft, and the axis of the dial is colinear with the central axis of the crankshaft. The dial is evenly distributed with scales in a ring shape, and the pointer cooperates with the scales to indicate the rotation angle of the dial.

[0007] Preferably, the dial indicator is fixed on the outer wall of the engine via a magnetic base.

[0008] Preferably, the engine phase lift detection device includes a base, a supporting platform and a detection platform, the supporting platform and the detection platform are both arranged on the base, the engine is fixedly arranged on the supporting platform, and the dial and the pointer are arranged on the detection platform.

[0009] Preferably, a sliding guide rail is provided on the base, and the supporting platform and the detection platform are both slidably connected to the sliding guide rail.

[0010] Preferably, the detection platform includes a fixed seat and a fixed shaft, the fixed shaft is horizontally fixed on the fixed seat, a placement hole is provided at the center of the dial, the fixed shaft is fixed in the placement hole, the pointer is fixed on the connecting disk, the connecting disk is sleeved on the fixed shaft, and the dial and the pointer can rotate relative to each other around the fixed shaft.

[0011] Preferably, a circular magnetic suction cup is fixedly provided at one end of the connection disk close to the fixing seat, and the connection disk is magnetically sucked onto the fixing seat through the magnetic suction cup.

[0012] Preferably, the dial is configured as a disc structure, the scale is provided on one side of the dial, and a fixing component is provided on the other side of the dial, and the dial is fixedly connected to the shaft head of the crankshaft through the fixing component; the fixing component includes a fixing plate, a clamping plate and a connecting portion, the shaft head of the crankshaft is arranged between the fixing plate and the clamping plate, and the fixing plate and the clamping plate are detachably connected through the connecting portion.

[0013] Preferably, the fixed plate includes a positioning section and a first connecting section at both ends of the positioning section, the positioning section is configured as a semicircular arc plate, the center of the inner arc in the positioning section is set on the axis of the dial, and the inner arc diameter of the positioning section is matched with the cross-sectional diameter of the crankshaft shaft head.

[0014] Preferably, the clamping plate includes a clamping section and a second connecting section at both ends of the clamping section, the clamping section is configured as an arc plate, the inner arc diameter of the clamping section is larger than the inner arc diameter of the positioning section, and a cushion layer for contacting the crankshaft is provided on the inner arc surface of the clamping section.

[0015] Preferably, the connecting portion includes a connecting rod and a connecting nut, the connecting rod is fixedly arranged on the first connecting section, the axes of the connecting rods are arranged in parallel, the second connecting section is provided with a connecting hole corresponding to the connecting rod, and the connecting rod passes through the connecting hole to be threadedly connected to the connecting nut.

[0016] Compared with the prior art, the beneficial effect of the utility model is that: the utility model simultaneously sets the dial indicator and the dial, and the dial cooperates with the pointer to monitor the crankshaft rotation angle in real time, and the dial indicator is used to monitor the valve tappet stroke position in real time, thereby realizing the detection of the corresponding relationship between the valve lift and the crankshaft angle in actual use, directly detecting the crankshaft angle instead of the camshaft angle, and directly detecting the valve lift instead of the camshaft lift. Therefore, based on the detection data detected by the utility model, the opening and closing timing and opening and closing size of the intake volume can be effectively controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the use of the engine phase lift detection device;

[0018] Figure 2 A structural view of the engine phase lift detection device;

[0019] Figure 3 is a structural view of the detection platform;

[0020] Figure 4 is a front structural view of the dial;

[0021] Figure 5 This is a structural view of the back side of the dial.

[0022] The numbers in the figure represent:

[0023] 1-piston; 2-valve tappet; 3-camshaft; 4-dial indicator; 5-dial; 6-pointer; 7-magnetic base; 8-base; 9-support platform; 10-detection platform; 51-scale; 81-sliding guide; 101-fixed seat; 102-fixed shaft; 103-connecting plate; 104-magnetic suction cup; 105-fixing assembly; 106-positioning section; 107-first connecting section; 108-clamping section; 109-second connecting section; 110-cushion; 111-connecting rod; 112-connecting nut. DETAILED DESCRIPTION

[0024] The following is a more detailed description of the above and other technical features and advantages of the present invention in conjunction with the accompanying drawings.

[0025] Embodiment 1

[0026] like Figure 1 As shown, Figure 1The engine phase lift detection device of the utility model is used to detect an engine, the engine comprising a piston 1, a valve tappet 2, a camshaft 3 and a crankshaft, the crankshaft drives the piston 1 to reciprocate, the camshaft 3 is connected to the valve tappet 2, and the camshaft 3 is connected to the crankshaft.

[0027] The detection device for the engine phase lift includes a dial indicator 4, a dial 5 and a pointer 6. The contact rod of the dial indicator 4 is in contact with the valve tappet 2 or the piston 1. The pointer 6 and the dial 5 are correspondingly arranged. The dial 5 is fixedly connected to the crankshaft, and the axis of the dial 5 is colinear with the central axis of the crankshaft. A scale 51 is arranged in an annular shape on the dial 5. The pointer 6 cooperates with the scale 51 to indicate the rotation angle of the crankshaft.

[0028] In this embodiment, the dial gauge 4 can be fixedly arranged on the outer wall of the engine through a magnetic base 7. In actual use, first, the contact rod of the dial gauge 4 is contacted and connected with the piston 1, and the piston 1 is moved to the highest point, that is, the farthest position from the crankshaft, by rotating the crankshaft and cooperating with the dial gauge 4. This position is used as the zero point of the crankshaft. The positions of the pointer 6 and the dial 5 are adjusted so that the pointer 6 points to the zero scale 51 on the dial 5. The dial 5 is fixedly arranged on the crankshaft, and the position of the dial gauge 4 is adjusted. The contact rod of the dial gauge 4 is contacted and connected with the valve tappet 2. The crankshaft is rotated, and the reading of the dial gauge 4 is recorded for each degree of rotation. The pointer 6 and the scale 51 are used to control the degree of each rotation. According to the cycle of the crankshaft, 720 data need to be detected. The lift is divided into intake valve lift and exhaust valve lift, that is, the valve tappet 2 corresponding to two different positions needs to be detected two sets of data respectively. Here, two dial gauges 4 can be provided to perform contact connection detection on the two valve tappets 2, or one dial gauge 4 can be adjusted in position and then tested twice. After the data detection is completed, it is compared with the theoretical value to determine whether the phase lift of the engine is available. The dial gauge 4 displays the change of the valve lift, and the change value of the lift of the dial gauge 4 is compared with the design value, and then it is determined whether the actual phase lift value is within the qualified range.

[0029] The utility model simultaneously arranges the dial indicator 4 and the dial 5, the dial indicator 5 cooperates with the pointer 6 to monitor the crankshaft rotation angle in real time, and the dial indicator 4 is used to monitor the valve tappet 2 stroke position in real time, thereby realizing the detection of the corresponding relationship between the valve lift and the crankshaft angle in actual use, directly detecting the crankshaft angle instead of the camshaft 3 angle, and directly detecting the valve lift instead of the camshaft 3 lift. Therefore, based on the detection data detected by the utility model, the opening and closing time and the opening and closing size of the intake volume can be effectively controlled.

[0030] Embodiment 2

[0031] like Figure 2 As shown, Figure 2 It is a structural view of the detection device of the engine phase lift; the detection device of the engine phase lift includes a base 8, a supporting platform 9 and a detection platform 10, the supporting platform 9 and the detection platform 10 are both arranged on the base 8, the engine is fixedly arranged on the supporting platform 9, the dial 5 and the pointer 6 are arranged on the detection platform 10, so as to achieve the relative position fixation of the engine and the dial 5 and the pointer 6.

[0032] Preferably, the base 8 is provided with a sliding guide rail 81, and the support platform 9 and the detection platform 10 are both slidably connected to the sliding guide rail 81. By adjusting the relative positions of the support platform 9 and the detection platform 10, it can be applied to the detection of engines of different sizes or shapes, thereby improving the applicability of the utility model and facilitating the installation of the dial 5 on the crankshaft. Generally, the support platform 9 and the detection platform 10 are both provided with locking members for locking the support platform 9 and the detection platform 10 in a fixed position on the sliding guide rail 81.

[0033] like Figure 3 As shown, Figure 3 It is a structural view of the detection platform; the detection platform 10 includes a fixed seat 101 and a fixed shaft 102, the fixed shaft 102 is horizontally fixedly set on the fixed seat 101, a placement hole is set at the center of the dial 5, the fixed shaft 102 is fixedly set in the placement hole, the pointer 6 is fixedly set on the outer circumferential surface of the connecting disk 103, the connecting disk 103 is sleeved on the fixed shaft 102, and the dial 5 and the pointer 6 can both rotate relatively around the fixed shaft 102, so that the zero adjustment and rotation angle indication of the dial 5 and the pointer 6 can be realized.

[0034] The fixed shaft 102, the dial 5 and the connecting plate 103 are coaxially arranged, and the center line of the pointer 6 is perpendicular to the axis of the fixed shaft 102, thereby ensuring that the pointer 6 points to the scale 51 accurately and stably at each position.

[0035] Preferably, a limiting ring can be provided at the shaft head position of the fixed shaft 102, and a limiting groove is provided at the corresponding placement hole, and the limiting ring is provided in the limiting groove, so that the limiting effect of the dial 5 on the fixed shaft 102 can be achieved while ensuring that the dial 5 can rotate relative to the fixed shaft 102, thereby preventing the dial 5 from coming off the fixed shaft 102. Similarly, the limiting structure of the limiting ring and the limiting groove may not be provided, so as to facilitate the disassembly of the dial 5 and to replace the dial 5 of corresponding specifications based on different situations.

[0036] Preferably, a circular magnetic suction cup 104 is fixedly provided at one end of the connecting disk 103 close to the fixing base 101, and the connecting disk 103 is magnetically sucked onto the fixing base 101 through the magnetic suction cup 104. The connecting disk 103 and the magnetic suction cup 104 are coaxially arranged. Through the magnetic suction effect of the magnetic suction cup 104, the position of the pointer 6 can be fixed by magnetic attraction after being rotated to a suitable position, thereby facilitating the zero adjustment of the dial 5 and the pointer 6.

[0037] Generally, when the dial 5 is rotated, a gap is provided between the connecting disk 103 and the dial 5 to prevent the displacement of the pointer 6 due to friction between the connecting disk 103 and the dial 5 when the dial 5 is rotated.

[0038] Embodiment 3

[0039] like Figure 4 , Figure 5 As shown, Figure 4 and Figure 5 They are structural views of the front and back sides of the dial respectively, the dial 5 is set to a disc structure, one side of the dial 5 is provided with the scale 51, that is, the surface provided with the scale 51 is the front side of the dial 5, and the other side of the dial 5 is provided with a fixing component 105, that is, the surface provided with the fixing component 105 is the back side of the dial 5. The dial 5 is fixedly connected to the shaft head of the crankshaft through the fixing component 105, so as to realize the rotation of the dial 5 and the crankshaft around the same axis.

[0040] The fixing assembly 105 includes a fixing plate, a clamping plate and a connecting portion. The shaft head of the crankshaft is arranged between the fixing plate and the clamping plate. The fixing plate and the clamping plate are detachably connected via the connecting portion, thereby facilitating the installation and disassembly of the dial 5 and the crankshaft.

[0041] Specifically, the fixing plate includes a positioning segment 106 and a first connecting segment 107 at both ends of the positioning segment 106, the positioning segment 106 is configured as a semicircular arc plate, the center of the inner arc in the positioning segment 106 is set on the axis of the dial 5, and the inner arc diameter of the positioning segment 106 is matched with the cross-sectional diameter of the crankshaft shaft head, so that when the inner arc of the positioning segment 106 is attached to the crankshaft shaft head through the clamping plate, the crankshaft and the dial 5 are coaxially arranged to ensure that the rotation angles of the crankshaft and the dial 5 are consistent.

[0042] The clamping plate includes a clamping section 108 and a second connecting section 109 at both ends of the clamping section 108. The clamping section 108 is configured as an arc plate. The inner arc diameter of the clamping section 108 is larger than the inner arc diameter of the positioning section 106, so as to facilitate the clamping and installation of the crankshaft by the clamping plate. A cushion layer 110 is provided on the inner wall of the clamping section 108. The cushion layer 110 is generally made of rubber. The clamping section 108 is in contact with the shaft head of the crankshaft through the cushion layer 110, so as to facilitate filling the gap between the clamping section 108 and the crankshaft and improve the clamping effect.

[0043] The connecting portion includes a connecting rod 111 and a connecting nut 112. The connecting rod 111 is fixedly arranged on the first connecting section 107. The axes of the connecting rods 111 are arranged in parallel. The second connecting section 109 is provided with a connecting hole corresponding to the connecting rod 111. The connecting rod 111 passes through the connecting hole and is threadedly connected to the connecting nut 112. The fixing plate and the clamping plate can clamp and fix the crankshaft shaft head by tightening the connecting nut 112. The connecting rod 111, the connecting nut 112 and the connecting hole are arranged in a one-to-one correspondence.

[0044] The above is only a preferred embodiment of the utility model, which is only illustrative and not restrictive. Those skilled in the art understand that many changes, modifications, and even equivalences can be made within the spirit and scope defined by the claims of the utility model, but they will all fall within the scope of protection of the utility model.

Claims

1. An engine phase lift detection device, used for detecting an engine, the engine comprising a piston, a valve tappet, a camshaft and a crankshaft, the crankshaft drives the piston to reciprocate, the camshaft is connected to the valve tappet in a driving manner, and the camshaft is connected to the crankshaft in a driving manner, characterized in that: The engine phase lift detection device includes a dial indicator, a dial and a pointer. The contact rod of the dial indicator is in contact with the valve tappet or the piston. The pointer and the dial are correspondingly arranged. The dial is fixedly connected to the crankshaft, and the axis of the dial is colinear with the central axis of the crankshaft. The dial is evenly distributed with scales in a ring shape, and the pointer cooperates with the scales to indicate the rotation angle of the dial.

2. The engine phase lift detection device according to claim 1, characterized in that: The dial indicator is fixed on the outer wall of the engine through a magnetic base.

3. The engine phase lift detection device according to claim 1, characterized in that: The engine phase lift detection device also includes a base, a supporting platform and a detection platform. The supporting platform and the detection platform are both arranged on the base, the engine is fixedly arranged on the supporting platform, and the dial and the pointer are arranged on the detection platform.

4. The engine phase lift detection device according to claim 3, characterized in that: The base is provided with a sliding guide rail, and the supporting platform and the detection platform are both slidably connected to the sliding guide rail.

5. The engine phase lift detection device according to claim 3, characterized in that: The detection platform includes a fixed seat and a fixed shaft, the fixed shaft is horizontally fixed on the fixed seat, a placement hole is provided at the center of the dial, the fixed shaft is fixed in the placement hole, the pointer is fixed on the connecting disk, the connecting disk is sleeved on the fixed shaft, and the dial and the pointer can both rotate relatively around the fixed shaft.

6. The engine phase lift detection device according to claim 5, characterized in that: A circular magnetic suction cup is fixedly arranged at one end of the connection disk close to the fixing seat, and the connection disk is magnetically sucked onto the fixing seat through the magnetic suction cup.

7. The engine phase lift detection device according to claim 5, characterized in that: The dial is arranged as a disc structure, the scale is arranged on one side of the dial, and a fixing assembly is arranged on the other side of the dial, and the dial is fixedly connected to the shaft head of the crankshaft via the fixing assembly; the fixing assembly comprises a fixing plate, a clamping plate and a connecting portion, the shaft head of the crankshaft is arranged between the fixing plate and the clamping plate, and the fixing plate and the clamping plate are detachably connected via the connecting portion.

8. The engine phase lift detection device according to claim 7, characterized in that: The fixing plate includes a positioning section and a first connecting section at both ends of the positioning section. The positioning section is configured as a semicircular arc plate. The center of the inner arc in the positioning section is configured on the axis of the dial. The inner arc diameter of the positioning section is configured to match the cross-sectional diameter of the crankshaft shaft head.

9. The engine phase lift detection device according to claim 8, characterized in that: The clamping plate includes a clamping section and a second connecting section at both ends of the clamping section. The clamping section is configured as an arc plate. The inner arc diameter of the clamping section is larger than the inner arc diameter of the positioning section. A cushion layer for contacting the crankshaft is provided on the inner arc surface of the clamping section.

10. The engine phase lift detection device according to claim 9, characterized in that: The connecting portion includes a connecting rod and a connecting nut. The connecting rod is fixedly arranged on the first connecting section. The axes of the connecting rods are arranged in parallel. The second connecting section is provided with a connecting hole corresponding to the connecting rod. The connecting rod passes through the connecting hole and is threadedly connected to the connecting nut.

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