CN210588032U - Adjusting device - Google Patents

Abstract

The utility model provides an adjusting device for valve clearance between rocking arm and the valve in the adjustment engine closes the piece. The adjusting device comprises a machine body assembly, a sliding table assembly which is assembled on the machine body assembly in a sliding mode and slides along the vertical direction, and a screwing and detecting module arranged on the sliding table assembly. The screwing and detecting module comprises a screw servo screwing assembly which can slide along the vertical direction relative to the sliding table assembly and is used for screwing or unscrewing an adjusting screw, and a locking nut servo screwing assembly which can slide along the vertical direction relative to the sliding table assembly and is used for screwing or unscrewing a locking nut. The adjusting device also comprises a platform component and a crankshaft driving component, wherein the platform component is positioned below the screwing and detecting module and used for supporting an engine assembly, and the crankshaft driving component is used for driving a crankshaft to rotate so as to enable the valve to be in a closed state. The adjusting screw or the locking nut is conveniently adjusted, so that the clearance between the rocker arm and the valve is within a set range, the application requirement is met, and the adjusting efficiency of the valve clearance is improved.

Description

Adjusting device

Technical Field

The utility model relates to the technical field of engines, especially, relate to an adjusting device.

Background

In a cold valve-top engine, when the valve is closed, a certain clearance, which is usually called valve clearance, must be reserved between the rocker arm and the valve. If the valve clearance of an engine working in a hot state is small, the valve is opened too early and closed untight, fuel consumption is caused, and gas flushes the valve and knocking is generated at the same time; if the valve clearance is too large, the valve opening is delayed, the air inflow is insufficient, and the waste gas cannot be sufficiently discharged, so that the power of the engine is influenced.

In order to ensure that the valve clearance meets the assembly technical requirements, the distance between the lower end face of the rocker arm and the upper end face of the valve needs to be detected while the valve clearance adjusting screw is screwed down or unscrewed. After the valve clearance adjusting screw reaches the set clearance value, the locking nut sleeved on the valve clearance adjusting screw is screwed down to lock the valve clearance adjusting screw and prevent the valve clearance adjusting screw from loosening.

At present, the adjustment and detection of the valve clearance of an engine mainly depend on manual tightening or a simple tightening tool to adjust a valve clearance adjusting screw, and meanwhile, a thickness gauge is adopted to manually measure the clearance value. The clearance value is adjusted and measured manually due to manual tightening or using simple tightening equipment. The valve clearance measurement method is easy to be interfered by human factors, and has the problem that the clearance measurement data is inaccurate, so that the quality control risk that the valve clearance value after the engine is assembled does not accord with the assembly technical requirement occurs.

SUMMERY OF THE UTILITY MODEL

The utility model provides an adjusting device for valve clearance between adjustment rocking arm and the valve.

The utility model provides an adjusting device, this adjusting device are arranged in adjusting the engine and close the valve clearance between rocking arm and the valve in the piece, and wherein the engine closes the piece and still includes drive rocking arm wobbling bent axle, set up on the rocking arm and be used for adjusting valve clearance's adjusting screw and locking adjusting screw's lock nut. The adjusting device comprises a machine body assembly and a sliding table assembly which is assembled on the machine body assembly in a sliding mode and slides along the vertical direction. The adjusting device further comprises a screwing and detecting module arranged on the sliding table assembly, wherein the screwing and detecting module comprises a screw servo screwing assembly which can slide along the vertical direction relative to the sliding table assembly and is used for screwing or unscrewing an adjusting screw, and a locking nut servo screwing assembly which can slide along the vertical direction relative to the sliding table assembly and is used for screwing or unscrewing a locking nut. The adjusting device further comprises a platform assembly and a crankshaft driving assembly, wherein the platform assembly is located below the screwing and detecting module and used for supporting an engine assembly, and the crankshaft driving assembly is arranged on the machine body assembly and used for driving a crankshaft to rotate so as to enable the valve to be in a closed state.

In the scheme, the screwing and detecting module is arranged on the sliding table assembly assembled on the machine body assembly in a sliding mode, the gap detecting assembly which can slide along the vertical direction relative to the sliding table assembly and is used for detecting the displacement of the rocker arm in the vertical direction is specifically arranged, and therefore the valve gap between the rocker arm and the valve can be conveniently detected. Through setting up the servo subassembly of screwing up of screw that can slide along vertical direction relatively the slip table subassembly and be used for screwing up or unscrew adjusting screw, set up the servo subassembly of screwing up of the locking nut that can slide along vertical direction relatively the slip table subassembly and be used for screwing up or unscrew lock nut, need not to adopt the manual work to screw up or unscrew lock nut and adjusting screw, conveniently adjust adjusting screw or lock nut, make the clearance between rocking arm and the valve be located the settlement within range, satisfy the application requirement, and improve the adjustment efficiency in valve clearance.

In a specific embodiment, the clearance detection assembly comprises a supporting structure arranged on the sliding table assembly, and a sensor assembly which is assembled on the supporting structure and used for abutting against the upper end face of the rocker arm so as to detect the displacement of the rocker arm in the vertical direction. Through adopting sensor assembly to measure the displacement volume of rocking arm in vertical direction, be convenient for detect the size of valve clearance, improve the accuracy that valve clearance detected.

In a specific embodiment, the sensor assembly comprises a displacement sensor arranged on the support structure, and a detection rod, wherein one end of the detection rod is pressed against the displacement sensor, and the other end of the detection rod is pressed against the upper end face of the rocker arm. Wherein, the displacement sensor is sleeved with a compression spring used for pressing the detection rod. Through adopting displacement sensor and supporting the measuring rod that presses on displacement sensor and rocking arm, pass through the measuring rod with the rocking arm displacement volume in vertical direction and transmit for displacement sensor, be convenient for measure the rocking arm at the ascending displacement volume of vertical direction, improve the accuracy that valve clearance detected.

In one embodiment, the end of the sensing rod facing the engine assembly is a spherical surface that contacts the upper end surface of the rocker arm when the sensing rod is pressed against the rocker arm, thereby reducing the friction between the sensing rod and the rocker arm.

In a specific embodiment, a bolt positioning device for pressing and positioning the engine assembly is further arranged on the sliding table assembly, so that the engine assembly is pressed conveniently.

In a specific embodiment, the bolt positioning device comprises a floating mounting plate which is assembled on the sliding table assembly in a floating mode, and a pressing block which is arranged on the floating mounting plate and used for pressing against the engine assembly. The floating installation plate is provided with a positioning hole, and the sliding table assembly is provided with a bolt for inserting or pulling out the positioning hole so as to compress and position the engine assembly.

In a specific embodiment, the tightening and detecting module is slidably assembled on the sliding table assembly, and the tightening and detecting module can slide along the horizontal direction relative to the sliding table assembly, so that the tightening and detecting module can be conveniently aligned with the valve and the rocker arm.

In a specific embodiment, the sliding table assembly is further provided with a displacement servo assembly for driving the screwing and detecting module to slide along the horizontal direction relative to the sliding table assembly, so that the screwing and detecting module can slide on the sliding table assembly conveniently.

In one particular embodiment, the lock nut servo tightening assembly includes a nut anti-rotation sleeve for securing the lock nut to prevent rotation of the lock nut when the adjustment screw is tightened or loosened.

In one embodiment, the crankshaft drive assembly slides on the body assembly to facilitate coupling the crankshaft drive assembly to the crankshaft.

Drawings

Fig. 1 is a front view of an adjusting device according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a-a plane of an adjusting device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a rocker arm according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a screw servo-tightening assembly and a lock nut servo-tightening assembly according to an embodiment of the present invention;

fig. 5 is a top view of a crankshaft drive assembly according to an embodiment of the present invention;

fig. 6 is a top view of an adjusting device according to an embodiment of the present invention;

fig. 7 is a partially enlarged view of an adjusting device according to an embodiment of the present invention;

fig. 8 is a partial enlarged view of an adjusting device according to an embodiment of the present invention.

Reference numerals:

10-machine body assembly 11-base 12-frame structure

20-slipway assembly 21-first mounting plate 22-second mounting plate 23-floating mounting plate

231-positioning hole 24-pressing block 25-plug pin

30-gap detection assembly 31-support structure 32-displacement sensor

33-displacement sensor mounting sleeve 34-detection rod 35-detection rod guide sleeve

36-detection rod guide sliding sleeve 37-spherical surface 40-screw servo tightening assembly

41-screw tightening head 50-locknut servo tightening assembly 51-nut anti-rotation sleeve

52-90 degree tightening head 53-tightening head mounting sleeve 60-displacement servo assembly

61-position-changing servo motor 62-ball screw 63-nut mounting seat 70-platform assembly

71-line body 72-tray 80-crankshaft driving component 81-first guide rail pair

82-first support plate 83-second guide rail pair 84-second support plate

90-engine assembly 91-valve 92-rocker arm

921-adjusting screw 922-locking nut 93-rotating shaft

94-mandril 95-crankshaft

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

For the convenience of understanding the adjusting device provided by the embodiment of the present invention, an application scenario thereof will be described first. The adjusting device is used for adjusting the valve clearance between the rocker arm and the valve in the engine assembly, wherein the engine assembly further comprises a crankshaft for driving the rocker arm to swing, an adjusting screw arranged on the rocker arm and used for adjusting the valve clearance, and a locking nut for locking the adjusting screw. The embodiment of the utility model provides an adjusting device is used for measuring valve clearance to adjust valve clearance in setting for the within range through screwing up or unscrewing adjusting screw, later screw up lock nut with locking adjusting screw again, thereby make the valve clearance between rocking arm and the valve be located the setting for within range, accord with operation requirement. The following describes the adjusting device according to an embodiment of the present invention in detail with reference to the accompanying drawings.

Referring to fig. 1, an adjusting apparatus provided in an embodiment of the present invention includes a body assembly 10 and a sliding table assembly 20 mounted on the body assembly 10. When the body assembly 10 is specifically provided, as shown in fig. 1, the body assembly 10 includes a base 11 and a frame structure 12 disposed on the base 11 for supporting. The base 11 and the frame structure 12 can be fixedly connected by welding, screw fastening, clamping and the like. It should be understood that fig. 1 illustrates only one manner of providing the body assembly 10, and that other manners may be employed.

In specific arrangement of the slide table assembly 20, referring to fig. 1 and 2, the slide table assembly 20 includes a support structure 31 including a first mounting plate 21 for being assembled to the body assembly 10, and a second mounting plate 22 connected to the first mounting plate 21. The first mounting plate 21 and the second mounting plate 22 can be fixedly connected by welding, bolts and the like; the first mounting plate 21 and the second mounting plate 22 may also be of unitary construction for ease of installation. It should be understood that the above description shows only one way of making up the ramp assembly 20, and that other arrangements may be used.

When the sliding table assembly 20 slides in the vertical direction relative to the machine body assembly 10, as shown in fig. 1 and fig. 2, a guide rail pair extending in the vertical direction is provided on the machine body assembly 10, and the sliding table assembly 20 is slidably mounted on the guide rail pair, so that the sliding table assembly 20 slides on the machine body assembly 10 through the guide rail pair. Specifically, referring to fig. 2, the first mounting plate 21 of the slide table assembly 20 is slidably mounted on the rail pair. When setting up the guide rail pair, the guide rail pair includes two guide rails that are parallel to each other or are close to parallel, and the extending direction of every guide rail is vertical direction, every guide rail sliding connection in slip table subassembly 20 and two guide rails to realize the slip of slip table on the guide rail, and improve the slip stability of slip table on the guide rail pair. It should be understood that the number of guide rails in the guide rail pair is not limited to the two shown above, and the number of guide rails may also be 1, 3, 4, etc. In addition, it should be noted that the sliding manner of the sliding table assembly 20 on the machine body assembly 10 is not limited to the above-mentioned manner of sliding by the guide rail pair, and other manners capable of sliding the sliding table assembly 20 on the machine body assembly 10 in the vertical direction may be adopted.

With continued reference to fig. 1, the body assembly 10 is further provided with a driving device for driving the sliding table assembly 20 to slide on the guide rail pair, and the sliding table assembly 20 is driven to slide on the guide rail pair by the driving device, so as to facilitate the sliding and locking of the sliding table assembly 20. When the driving device is specifically set, the driving device may be a driving cylinder, a linear motor, or the like. It should be understood that the manner in which the slide table assembly 20 is driven to slide on the rail pair is not limited to the manner in which the drive mechanism is driven as described above, and other manners may be used. The sliding of the slide table assembly 20 relative to the body assembly 10 can be achieved, for example, by manually driving the slide table assembly 20 to slide on the guide rail pair.

Referring to fig. 1 and 2, a tightening and detecting module is disposed on the sliding table assembly 20, wherein the tightening and detecting module includes a gap detecting assembly 30 which can slide in the vertical direction relative to the sliding table assembly and is used for detecting a valve gap, a screw servo tightening assembly 40 which can slide in the vertical direction relative to the sliding table assembly 20 and is used for tightening or loosening the adjusting screw 921, and a lock nut servo tightening assembly 50 which can slide in the vertical direction relative to the sliding table assembly 20 and is used for tightening or loosening the lock nut 922. The clearance detecting assembly 30 includes a sensor assembly for pressing against the upper end surface of the rocker arm 92 to detect the swing displacement of the rocker arm 92. Referring to fig. 1, a platform assembly 70 for supporting an engine assembly 90 is disposed below the sliding table assembly 20, and a crankshaft driving assembly 80 for driving a crankshaft 95 to rotate so as to enable the valve 91 to be in a closing device is disposed on the machine body assembly 10.

In use, the engine assembly 90 is placed on the platform assembly 70, and then the crankshaft driving assembly 80 is connected to the crankshaft 95 of the engine assembly 90 and drives the crankshaft 95 to rotate, so that the valve 91 to be adjusted on the engine assembly 90 is in a closed state. Then, the sliding table assembly 20 slides downward to a set position relative to the body assembly 10, and the gap detection assembly 30 slides downward relative to the sliding table assembly 20, so that the sensor assembly is pressed against the upper end surface of the rocker arm 92. The lock nut 922 is then loosened by sliding the lock nut servo tightening assembly 50 and the screw servo tightening assembly 40 downward. The screw servo tightening assembly 40 first loosens the adjustment screw 921 so that the lower end surface of the rocker arm 92 is pressed against the valve 91. And then the adjusting screw 921 is tightened to separate the lower end surface of the rocker arm 92 from the valve 91, when the adjusting screw 921 is tightened, because the rocker arm 92 swings, the sensor assembly is always pressed against the upper end surface of the rocker arm 92, the sensor assembly can record the displacement of the upper end surface of the rocker arm 92, and the displacement of the upper end surface of the rocker arm 92 is the size of the valve clearance, so that the sensor assembly can measure the size of the valve clearance. When the sensor unit measures that the displacement amount of the upper end surface of the rocker arm 92 is within the set range, the screw servo tightening unit 40 may stop tightening the adjustment screw 921, and the lock nut servo tightening unit 50 may tighten the lock nut 922 to lock the adjustment screw 921. After the adjusting screw 921 is locked, whether the valve clearance is within a set range can be obtained by reading the value in the sensor assembly, so that the valve clearance can be rechecked, and the accuracy of adjusting the valve clearance is improved.

In the setting of the platform assembly 70, referring to fig. 1, the platform assembly 70 includes a wire 71 for conveying the engine assembly 90 to the lower side of the sliding table assembly 20, and is used for placing the engine assembly 90 and a tray 72 disposed above the wire 71, and the engine assembly 90 is supported by using the tray 72, so as to facilitate the conveying of the engine assembly 90. The wire body 71 is a transmission device for transmitting workpieces in the prior art, and specifically comprises a support frame and rollers arranged on the support frame, so that the tray 72 on which the engine assembly 90 is placed is transmitted on the wire body 71.

Referring to fig. 1, the wire body 71 is provided with a stopper for positioning the motor assembly 90, and when the motor assembly 90 is conveyed below the sliding table assembly 20, the stopper prevents the motor assembly 90 from continuously sliding forward, so that the motor assembly 90 is conveniently conveyed to a proper position for subsequent measurement and adjustment. When the stopper is provided, the stopper is a structural member having a blocking function, which is conventional in the prior art.

Referring to fig. 1, the platform assembly 70 further includes a positioning and lifting assembly disposed on the body assembly 10 and used for lifting the tray 72 to be separated from the wire 71, so that the motor assembly 90 and the wire 71 are separated from each other, and the transmission of the wire 71 does not interfere with the measurement of the motor assembly 90. In particular arrangements of the positioning and lifting assembly, the positioning and lifting assembly includes a lifting cylinder for lifting the tray 72, wherein the lifting cylinder is conventional in the art. The piston rod of the lifting cylinder extends to push the tray 72 to move upwards, so that the motor assembly 90 is separated from the wire body 71.

It should be understood that the manner in which the platform assembly 70 is provided is not limited to that shown above, and that other manners may be used. For example, manual handling and placement may be used. Specifically, a platform for supporting the engine assembly 90 is provided below the sliding table assembly 20, and the engine assembly 90 is placed on the platform in a manual carrying manner.

When setting up bent axle drive assembly 80, refer to fig. 1 and fig. 5, bent axle drive assembly 80 includes bent axle drive servo motor, bent axle drive servo motor's output shaft is connected with the speed reducer, the output shaft and the torque limiter of speed reducer are connected, the one end that deviates from the speed reducer on the torque limiter is connected with torque sensor, the one end that deviates from the torque limiter on the torque sensor is connected with the shaft coupling, the one end that deviates from torque sensor on the shaft coupling is connected with the mechanical main shaft, the one end that deviates from the shaft coupling on the mechanical main shaft is connected with the coupling head. When the coupling is used, the coupling head is connected with a crankshaft 95 on the engine assembly 90, and the crankshaft drives the servo motor to rotate, and drives the crankshaft 95 to rotate sequentially through the speed reducer, the torque limiter, the torque sensor, the coupler, the mechanical spindle and the coupling head. When the crankshaft 95 rotates, the ejector rod 94 is driven to swing, the ejector rod 94 pushes the rocker arm 92 to swing, and the rocker arm 92 drives the valve 91 to rotate. When the valve 91 is in a closed state and the engine assembly 90 is in a timing state, the crankshaft is stopped from driving the servo motor to rotate. It should be understood that the above description shows only one way of driving the crankshaft drive assembly 80, and that other arrangements may be used to drive the crankshaft 95 in rotation to close the valve 91.

Referring to fig. 1 and 5, the crankshaft driving assembly 80 is slidably mounted on the body assembly 10, and in particular, the crankshaft driving assembly 80 is slidable in at least one direction relative to the body assembly 10. During the setting, the crankshaft driving assembly 80 can be set to slide along the vertical direction and along two horizontal directions which are perpendicular to each other relative to the machine body assembly 10; the crankshaft drive assembly 80 may also be configured to slide in two horizontal directions perpendicular to each other to facilitate alignment of the crankshaft drive assembly 80 and the crankshaft 95 on the engine assembly 90, thereby facilitating connection of the crankshaft drive assembly 80 to the crankshaft 95.

In a specific arrangement, referring to fig. 1, a first guide rail pair 81 extending in a first direction (up-down direction as shown in fig. 5) is provided on the body assembly 10, a first support plate 82 is slidably fitted on the first guide rail pair 81, and the first support plate 82 slides on the first guide rail pair 81. A second rail pair 83 is provided on the first support plate 82, and the extending direction of the second rail pair 83 extends in a second direction (the left-right direction as shown in fig. 5). A second support plate 84 is slidably fitted on the second rail pair 83, and the second support plate 84 slides in the left-right direction with respect to the first support plate 82. The crankshaft driving assembly 80 is disposed on the second support plate 84, so that the crankshaft driving assembly 80 slides in two horizontal directions perpendicular to each other with respect to the machine body assembly 10.

Referring to fig. 5, when the first supporting plate 82 is driven to slide on the first guide rail pair 81, a driving cylinder for driving the first supporting plate 82 to slide on the first guide rail pair 81 is provided on the machine body assembly 10, so as to facilitate the sliding of the first supporting plate 82 relative to the machine body assembly 10. Referring to fig. 5, a driving cylinder for driving the second support plate 84 to slide on the second rail pair 83 is provided on the first support plate 82, thereby facilitating the sliding of the second support plate 84 on the second rail pair 83. It should be understood that the manner of driving the two support plates to slide on the respective rail pairs is not limited to the manner of driving by the driving cylinders described above, but other manners may be adopted. For example, a linear motor or a manual drive may be used.

Referring to fig. 1 and 2, the embodiment of the present invention provides an adjusting device further comprising a pin positioning device disposed on the sliding table component 20 and used for compressing and positioning the engine assembly 90, wherein when the engine assembly 90 is transported to the platform component 70, the sliding table component 20 slides along the vertical direction, so that the pin positioning device is pressed against the engine assembly 90, thereby preventing the engine assembly 90 from position change during the measurement and adjustment process.

When the latch positioning device is specifically provided, referring to fig. 1 and fig. 2, a floating mounting plate 23 is provided on the slide table assembly 20, and a pressing block 24 for pressing against the engine assembly 90 is provided on the floating mounting plate 23. A positioning hole 231 is provided on the floating mounting plate 23, and a plug 25 for inserting into the positioning hole 231 is provided on the slide table assembly 20. Specifically, the floating mounting plate 23 is connected to the second mounting plate 22 on the slide table assembly 20 in a floating manner, and the floating connection can be realized in a floating spring, a guide rod, and the like, so that the floating mounting plate 23 can deflect relative to the first mounting plate 21 within a certain range. When the pressing block 24 is specifically disposed on the floating mounting plate 23, the pressing block 24 may be fixedly connected to the floating mounting plate 23 by means of bolt fastening, welding, or the like. One surface of the pressing block 24, which is far away from the floating mounting plate 23, is provided with a reference surface, and when the pressing block 24 is pressed against the engine assembly 90, the reference surface on the pressing block 24 is in contact with the reference surface on the engine assembly 90, so that the pressing block 24 presses the engine assembly 90. Referring to fig. 2, a positioning hole 231 is provided on the floating mounting plate 23, and a plug 25 inserted into the positioning hole 231 is provided on the slide table assembly 20. When the plug 25 is inserted into the positioning hole 231, the floating mounting plate 23 cannot be shifted relative to the slide table assembly 20, i.e., the floating mounting plate 23 is not in a floating condition. When the plug 25 is pulled out of the positioning hole 231, the floating mounting plate 23 can slide relative to the slide table assembly 20, so that the floating mounting plate 23 is in a floating state. It should be understood that before the slide table assembly 20 slides downward, the latch 25 is first pulled out of the positioning hole 231 to place the floating mounting plate 23 in a floating condition, thereby facilitating the pressing of the motor assembly 90 by the pressing block 24.

Referring to fig. 2, in order to facilitate the insertion and extraction of the plug pin 25, a driving cylinder for driving the plug pin 25 to move up and down is disposed on the sliding table assembly 20, and a piston rod of the driving cylinder is fixedly connected to the plug pin 25 by fastening a screw, welding, or the like. When the plug pin 25 needs to be pulled out of the positioning hole 231, the piston rod of the driving cylinder retracts, so that the plug pin 25 is pulled out of the positioning hole 231; when the plug pin 25 needs to be inserted into the positioning hole 231, the piston rod of the driving cylinder is extended to insert the plug pin 25 into the positioning hole 231. It should be understood that the manner of inserting and removing the plug 25 is not limited to the above-described manner, and other manners may be adopted.

Additionally, it should be noted that the above only illustrates one manner of providing the latch positioning device, and other manners of fixing the motor assembly 90 by pressing against the motor assembly 90 may be used.

When the tightening and detecting module is arranged, the tightening and detecting module can be fixedly connected with the sliding table assembly 20 in a bolt connection mode, a welding mode and the like, and the valve 91 and the rocker arm 92 to be adjusted on the engine assembly 90 are located right below the tightening and detecting module by adjusting the engine assembly 90. The tightening and detecting module can also be slidably assembled on the sliding table assembly 20, and the tightening and detecting module is positioned above the valve 91 and the rocker arm 92 to be adjusted on the engine assembly 90 by moving the tightening and detecting module. When specifically making the subassembly of screwing up and detecting to slide on slip table subassembly 20, screwing up and detecting the module and can slide along two mutually perpendicular directions relative to slip table subassembly 20, screwing up and detecting the module and still can slide along a direction relative to slip table subassembly 20. The tightening and detecting module is slidably mounted on the slide table assembly 20 as an example and will be described in detail below.

First, referring to fig. 2, 3, 7 and 8, the lash detecting assembly 30 is described, and the lash detecting assembly 30 includes a sensor assembly for pressing against the upper end surface of the rocker arm 92 to measure the displacement offset of the upper end surface of the rocker arm 92. When the sensor assembly is provided, referring to fig. 7 and 8, a support structure is provided on the slide table assembly 20, and the support structure 31 may be a plate structure for supporting. Specifically, the supporting structure 31 is fixedly connected to the second mounting plate 22 on the slide table assembly 20 by means of screw fastening, welding, or the like. Referring to fig. 7 and 8, a displacement sensor 32 is disposed on the supporting structure, and the displacement sensor 32 may be a pneumatic displacement sensor 32, a capacitance sensor, or other sensors capable of measuring displacement in the prior art. Referring to fig. 7 and 8, a displacement sensor mounting sleeve 33 is disposed on the supporting structure 31, the displacement sensor 32 is sleeved in the displacement sensor mounting sleeve 33, and the displacement sensor 32 can slide up and down relative to the displacement sensor mounting sleeve 33.

Referring to fig. 8, a detection rod 34 is disposed between the displacement sensor 32 and the upper end surface of the rocker arm 92, and one end of the detection rod 34 abuts against the probe of the displacement sensor 32 and the other end abuts against the upper end surface of the rocker arm 92. Specifically, a detection rod guide sleeve 35 is provided on the support structure 31, the detection rod 34 is slidably fitted in the detection rod guide sleeve 35, and the probe of the displacement sensor 32 is inserted into the detection rod guide sleeve 35. In the case of implementing the sliding assembly of the detection lever 34 in the detection lever guide sleeve 35, referring to fig. 8, a detection lever guide sliding sleeve 36 is provided in the detection lever guide sleeve 35, and the detection lever 34 is assembled in the detection lever guide sleeve 35 through the detection lever guide sliding sleeve 36. Referring to fig. 8, a compression spring for pressing the detection rod 34 is sleeved on the detection head of the displacement sensor 32, one end of the compression spring presses against the displacement sensor 32, and the other end of the compression spring presses against the detection rod 34, so that the detection rod 34 is in close contact with the rocker arm 92. When the swing arm 92 swings, the upper end of the swing arm 92 moves upward or downward, and the probing tip of the displacement sensor 32 moves upward or downward, so that the displacement sensor 32 measures the displacement of the probing tip movement. At the initial measurement by the displacement sensor 32, the valve clearance is zero at this time because the lower end surface of the rocker arm 92 is in contact with the valve 91. When the adjustment screw 921 is tightened, the rocker arm 92 rotates about the rotary shaft 93, so that the upper end surface of the rocker arm 92 moves upward, and the displacement sensor 32 measures the valve clearance between the lower end surface of the rocker arm 92 and the valve 91 by measuring the amount of upward movement of the upper end surface of the rocker arm 92.

Referring to fig. 8, the end of the sensing rod 34 facing the engine assembly 90 is a spherical surface 37, and when the sensing rod 34 is pressed against the rocker arm 92, the spherical surface 37 contacts the upper end surface of the rocker arm 92. Since the upper end surface of the swing arm 92 moves in an arc shape and the detection lever 34 moves in a straight shape during the swing of the swing arm 92, the upper end surface of the swing arm 92 and the detection lever 34 move relative to each other. By providing the spherical surface 37 at the end of the detection lever 34, friction between the upper end surface of the rocker arm 92 and the detection lever 34 is reduced.

Referring to fig. 6 and 7, the gap detecting assembly 30 is slidably assembled on the sliding table assembly 20, specifically, a guide rail pair slidably connected to the gap detecting assembly 30 and extending in the vertical direction is disposed on the sliding table assembly 20, and the sliding table assembly 20 is slidably connected to the gap detecting assembly 30 through the guide rail pair. Referring to fig. 7, a driving cylinder for driving the gap sensing assembly 30 to slide up and down with respect to the slide table assembly 20 is provided on the slide table assembly 20, and the gap sensing assembly 30 is driven to move up and down by the driving cylinder, so as to control the gap sensing assembly 30. After the engine assembly 90 is placed on the platform assembly 70, the driving cylinder drives the gap detection assembly 30 to slide downward, so that the sensor assembly in the gap detection assembly 30 is pressed against the upper end surface of the rocker arm 92. It should be understood that the above only shows one way of slidably assembling the gap detection assembly 30 on the slide table assembly 20, and other ways of slidably assembling the gap detection assembly 30 on the slide table assembly 20 may be adopted. The manner of driving the gap detection unit 30 to slide with respect to the slide table unit 20 is not limited to the manner described above by driving the air cylinder, and other manners may be adopted.

It should be understood that the above description shows only one way of constituting the sensor assembly, and other sensor assemblies capable of measuring the amount of displacement of the upper end surface of the swing arm 92 in the vertical direction may be employed. It should be noted that the above description shows only one way of measuring the valve clearance between the rocker arm 92 and the valve 91, and other ways, for example, a thickness gauge, may be used.

Next, the screw servo-tightening assembly 40 and the lock nut servo-tightening assembly 50 will be described with reference to fig. 2, 3, 4, 7 and 8. Referring first to fig. 3, the right side of the rocker arm 92 (with reference to the rocker arm 92 shown in fig. 3) is provided with an adjustment screw 921 for adjusting the valve clearance, and with reference to fig. 3, when the adjustment screw 921 is tightened to cause the rocker arm 92 to rotate about the rotation shaft 93 in the clockwise direction (with reference to the rocker arm 92 shown in fig. 3), the valve clearance between the rocker arm 92 and the valve 91 is increased; when the adjustment screw 921 is loosened, causing the rocker arm 92 to rotate counterclockwise about the rotary shaft 93 (with reference to the rocker arm 92 shown in fig. 3), the valve clearance between the rocker arm 92 and the valve 91 is reduced. Referring to fig. 3, a lock nut 922 is provided on the adjustment screw 921, and when the lock nut 922 is tightened, the adjustment screw 921 is locked so that the adjustment screw 921 cannot rotate; when the lock nut 922 is loosened, the adjustment screw 921 is unlocked, so that the adjustment screw 921 can be rotated. When adjusting the valve clearance between the rocker arm 92 and the valve 91, the lock nut 922 needs to be loosened to allow the adjustment screw 921 to be rotated. The valve clearance is then adjusted by tightening or loosening the adjustment screw 921. When the lower end surface of the rocker arm 92 abuts against the valve 91 (the valve clearance is zero), the adjustment screw 921 is rotatable only in the direction of increasing the valve clearance and is not rotatable in the direction of decreasing the valve clearance. In a specific operation, the adjustment screw 921 is first loosened (as shown in fig. 3 for example) to press the lower end surface of the rocker arm 92 against the valve 91, i.e., the adjustment screw 921 is screwed to a position where it cannot be loosened any more. The reading of the displacement sensor 32 is then adjusted to the first set value d 1. The adjustment screw 921 is then screwed in the opposite direction, gradually moving the lower end surface of the rocker arm 92 away from the upper end surface of the valve 91. When tightened to a certain extent, the displacement sensor 32 reads a second set value d2, at which time the valve play is d2-d 1. And judging whether the valve clearance is in a set range, and if the valve clearance is in the set range, indicating that the valve clearance meets the application requirement. At this time, the tightening or loosening of the adjustment screw 921 may be stopped, and the lock nut 922 may be tightened to lock the adjustment screw 921, thereby completing the adjustment of the valve clearance. It is then possible to recheck whether the valve clearance is within the set range by reading the reading of the displacement sensor 32. If the valve clearance is not within the set range, the actual value of the valve clearance may be compared with the set range to tighten or loosen the adjustment screw 921 so that the valve clearance is within the set range. And then the lock nut 922 is screwed down and rechecked.

When the screw servo tightening unit 40 is provided, referring to fig. 4, 7 and 8, the screw servo tightening unit 40 includes a servo motor, an output shaft of which is connected to a speed reducer, and a screw tightening head 41 is connected to an output shaft of the speed reducer. When the adjusting screw 921 needs to be screwed or unscrewed, the screw tightening head 41 is pressed against the adjusting screw 921, the servo motor rotates in the reverse direction or the forward direction, and the screw tightening head 41 is driven to rotate through the speed reducer, so that the adjusting screw 921 is driven to rotate. In a specific setting, the screw servo tightening assembly 40 adopts a high-precision electric tightening shaft system, the electric tightening shaft system has a self-compensation function, and a contact gap between a tightening head and a straight groove on the adjusting screw 921 can be eliminated through the electric tightening shaft system and a program algorithm, so that the accuracy of valve clearance adjustment is improved. It should be understood that the above description is merely illustrative of one manner of providing the screw servo-tightening assembly 40, and that other manners may be used.

When the locknut servo tightening assembly 50 is provided, referring to fig. 4, 7 and 8, the locknut servo tightening assembly 50 includes a servo motor for providing power, a speed reducer is provided on an output shaft of the servo motor, and a 90 ° tightening head 52 is provided on an output shaft of the speed reducer, wherein a tightening head mounting sleeve 53 is sleeved on the 90 ° tightening head 52, a nut anti-rotation sleeve 51 is sleeved on the tightening head mounting sleeve 53, and the nut anti-rotation sleeve 51 is sleeved on the locknut 922. And a nut anti-rotation sleeve 51 compression spring is sleeved between the nut anti-rotation sleeve 51 and the tightening head mounting sleeve 53. The screw tightening head 41 of the screw servo tightening assembly 40 is pressed against the adjustment screw 921 through the nut rotation preventing sleeve 51. The 90 ° tightening head 52 is a transmission mechanism composed of a gear transmission and capable of driving the tightening head mounting sleeve 53 to rotate, and the specific arrangement mode is the arrangement mode in the prior art. The nut anti-rotation sleeve 51 is a conventional nut anti-rotation sleeve 51 in the prior art. Adopt foretell mode of setting, nut anti-rotating sleeve 51 among the servo subassembly 50 of screwing up of lock nut is relatively independent structure, and it can make the servo subassembly 40 of screwing up of screw when screwing up or unscrewing adjusting screw 921, guarantees that lock nut 922 does not take place to rotate to make lock nut 922 not influence the rotation of adjusting screw 921, and make the rotation of adjusting screw 921 not drive lock screw's rotation, thereby prevent that lock nut 922 rotation is not hard up, reduce the influence of nut anti-rotating sleeve 51 to detecting the precision.

It should be understood that the above description is only illustrative of one manner of providing the lock nut servo-tightening assembly 50, and that other manners of enabling rotation of the lock nut 922 may be used.

It should be understood that the above only illustrates one way of providing the tightening and detection module, and that other arrangements may be used.

The valves 91 on the engine assembly 90 are functionally divided into intake valves 91 and exhaust valves 91, and the corresponding rocker arms 92 are divided into rocker arms 92 for driving the intake valves 91 to move and rocker arms 92 for driving the exhaust valves 91 to move. The number of the intake valves 91 on the engine assembly 90 may be any value such as 1, 2, 3, 4, etc., and the number of the exhaust valves 91 on the engine assembly 90 is equal to the number of the intake valves 91. When the tightening and detecting module detects the valve 91 and the rocker arm 92 on the engine assembly 90, the tightening and detecting module firstly adjusts one valve 91 on the engine assembly 90 and the rocker arm 92 corresponding to the valve 91, and after the valve 91 and the rocker arm 92 are adjusted, the tightening and detecting module detects and adjusts the other valves 91 and the rocker arms 92 on the engine assembly 90. That is, the tightening and detecting module adjusts the valve clearance of the engine assembly 90 one by adjusting the valve 91 and the rocker arm 92 corresponding to the valve 91.

After the tightening and sensing module has adjusted one of the valves 91 and rocker arms 92, it is necessary to move the tightening and sensing module to a position above the other valve 91 and rocker arm 92 of the engine assembly 90. In order to facilitate the movement of the tightening and detecting module, referring to fig. 1, 2, 6 and 7, the sliding table assembly 20 is further provided with a displacement servo assembly 60 for driving the tightening and detecting module to slide along the horizontal direction, and after the tightening and detecting module adjusts one of the valves 91 and the rocker arm 92, the clearance detecting assembly 30 in the tightening and detecting module slides upwards to enable the sensor assembly to leave the upper end surface of the rocker arm 92; the screw servo tightening assembly 40 and the locking screw servo tightening assembly 40 slide upward, allowing the screw servo tightening assembly 40 and the locking screw servo tightening assembly 40 to move away from the adjustment screw 921 and the locking nut 922 on the rocker arm 92. Then the shifting servo assembly 60 drives the tightening and detecting module to slide to the other valve 91 of the engine assembly 90 and above the rocker arm 92 corresponding to the valve 91 along the horizontal direction, so that the tightening and detecting module adjusts the other valve 91 and the rocker arm 92 on the engine assembly 90.

When specifically setting up servo assembly 60 shifts, refer to fig. 1, fig. 2, fig. 6 and fig. 7, servo assembly 60 shifts is including setting up the servo motor on screwing up and detecting module, is connected with the shaft coupling at servo motor's output shaft, and the output shaft one end of keeping away from servo motor on the shaft coupling is connected with ball, is provided with the screw with ball 62 threaded connection on slip table subassembly 20 and fixes the screw mount pad 63 of screw. A guide rail pair extending in the left-right direction (with reference to the adjustment device shown in fig. 1) is provided on the slide table assembly 20, and the tightening and detection module is slidably fitted on the guide rail pair, thereby achieving sliding of the tightening and detection module with respect to the slide table assembly 20. When the position of the tightening and detecting module needs to be moved, the displacement servo motor 61 is started, the output shaft of the displacement servo motor 61 drives the ball screw 62 to rotate, and the ball screw 62 drives the tightening and detecting module to slide on the guide rail pair by screwing in or screwing out a nut, so that the tightening and detecting module slides relative to the sliding table assembly 20. It should be understood that the above description is only illustrative of one manner of achieving sliding movement of the tightening and sensing module relative to the slide assembly 20, and that other manners may be used. It should be noted that the above only shows one driving manner for driving the tightening and detecting module to slide on the guide rail pair, and other driving manners for driving the tightening and detecting module to slide on the sliding table assembly 20 may be adopted. For example, a linear motor or a driving cylinder may be used.

In addition, in order to facilitate the control of the transmission of the wire body 71 to the engine assembly 90, a control unit may be further provided, the control unit is configured to control the transmission of the wire body 71 to the engine assembly 90, and when the control unit controls the wire body 71 to transmit the engine assembly 90 to the lower side of the sliding table assembly 20, the control unit controls the wire body 71 to stop transmitting. The control unit is also used for controlling the lifting cylinder to lift the engine assembly 90, so that the engine assembly 90 and the tray 72 are separated from the wire 71. Specifically, when the line body 71 conveys the engine assembly 90 to the lower part of the sliding table assembly 20, the control unit controls the lifting cylinder to lift the tray 72, so that the engine assembly 90 is separated from the line body 71.

The control unit is also used for controlling the plug pin 25 in the plug pin positioning device to be inserted into or pulled out of the positioning hole 231 of the floating installation plate 23, and after the engine assembly 90 is lifted to the position of the disengaging line body 71, the control unit controls the plug pin 25 in the plug pin positioning device to be pulled out of the floating installation plate 23, so that the floating installation plate 23 is in a floating working condition. The control unit is further configured to control the sliding table assembly 20 to slide on the body assembly 10, and specifically, when the floating mounting plate 23 is in a floating condition, the control unit controls the sliding table assembly 20 to slide downward, so that the pressing block 24 is pressed against the engine assembly 90.

The control unit is further configured to control the crankshaft driving assembly 80 to drive the crankshaft 95, specifically, after the engine assembly 90 is fixed by the pressing block 24, the control unit controls the driving cylinder to drive the crankshaft driving assembly 80 to extend, and then the control unit controls the second driving device to drive the crankshaft driving assembly 80 to connect to the crankshaft 95. After the crankshaft driving assembly 80 is connected to the crankshaft 95, the control unit controls the crankshaft 95 to drive the servo motor to rotate, thereby driving the crankshaft 95 to rotate. When the crankshaft 95 rotates to close the valve 91 to be adjusted, the control unit controls the crankshaft 95 to drive the servo motor to stop rotating.

The control unit is also used for controlling the screwing and detecting module to slide along the vertical direction relative to the sliding table assembly 20, and when the air valve 91 is in a closed state, the control unit controls the screwing and detecting module to slide relative to the sliding table assembly 20. Specifically, the control unit controls the screw servo tightening assembly 40 and the lock nut servo tightening assembly 50 to slide downward, so that the screw tightening head 41 is pressed against the linear groove of the adjusting screw 921, and the nut anti-rotation sleeve 51 in the lock nut servo tightening assembly 50 is sleeved on the lock nut 922. The control unit is further used for controlling the locking nut servo tightening assembly 50 to tighten the locking nut 922, and the control unit is further used for controlling the screw servo tightening assembly 40 to loosen or tighten the adjusting screw 921, so that the lower end face of the rocker arm 92 is in contact with the upper end face of the valve 91 (the valve clearance is zero).

The control unit is also used for controlling the sensor assembly to be pressed against the upper end face of the rocker arm 92, recording the reading of the displacement sensor 32 and calculating the displacement of the displacement sensor 32, so that the valve clearance between the lower end face of the rocker arm 92 and the valve 91 is obtained. When the screw servo tightening assembly 40 tightens or loosens the adjustment screw 921 so that the valve clearance between the lower end surface of the rocker arm 92 and the upper end surface of the valve 91 is within the set range, the control unit controls the screw servo tightening assembly 40 to stop tightening or loosening the adjustment screw 921. The control unit is then also used to control the nut servo tightening assembly to tighten the lock nut 922, thereby locking the adjustment screw 921. The control unit is also used for rechecking the valve clearance by the sensor assembly to judge whether the valve clearance between the valve 91 and the rocker arm 92 is within a set range. If the control unit judges that the valve clearance between the valve 91 and the rocker arm 92 is not in the set range, the control unit controls the locking nut servo tightening assembly 50 and the screw servo tightening assembly 40 to adjust the adjusting screw 921 and the locking nut 922 until the sensor assembly rechecks that the valve clearance between the valve 91 and the rocker arm 92 is in the set range.

The control unit is also used for controlling the screwing and detecting module to slide upwards and retreat to the initial position, in particular, the control unit controls the clearance detecting assembly 30 to slide upwards, so that the upper end face of the rocker arm 92 of the clearance detecting assembly 30 is separated. The control unit controls the screw servo tightening assembly 40 and the lock nut servo tightening assembly 50 to slide upwards, so that the screw tightening head 41 in the screw servo tightening assembly 40 is separated from the adjusting screw 921, and the nut anti-rotation sleeve 51 in the lock nut servo tightening assembly 50 is separated from the lock nut 922.

The control unit is also used for controlling the displacement servo assembly 60 to slide the tightening and detection module to the upper part of other valves 91 and rocker arms 92 on the engine assembly 90, so as to adjust other valves 91 and rocker arms 92 on the engine assembly 90.

And a storage unit can be further arranged, and the storage unit stores all the adjustment and detection data, establishes a database and is convenient for quality tracing in the future.

In addition, a plurality of tightening and detecting modules may be provided on the slide table assembly 20 to improve the efficiency of adjusting the valve clearance between the valve 91 and the rocker arm 92 on the engine assembly 90. Referring to fig. 1, two tightening and detecting modules are provided on the slide table assembly 20, and it should be understood that the number of tightening and detecting modules is not limited to two shown in fig. 1, and in addition, the number of tightening and detecting modules may be any value not less than three, such as three, four, etc.

Through set up on slip table subassembly 20 of sliding assembly on body subassembly 10 and screw up and detection module, specifically set up the clearance detection subassembly 30 that can slide along vertical direction and be used for detecting the displacement volume of rocking arm 92 in vertical direction relatively slip table subassembly 20 to conveniently detect the valve clearance between rocking arm 92 and valve 91. Can slide along vertical direction and be used for screwing up or unscrewing the servo subassembly 40 of screwing up of screw of adjusting screw 921 relatively slip table subassembly 20 through the setting, the setting can slide along vertical direction and be used for screwing up or unscrewing the servo subassembly 50 of screwing up of lock nut 922 relatively slip table subassembly 20, need not to adopt artifical the screwing up or unscrew lock nut 922 and adjusting screw 921, conveniently adjust adjusting screw 921 or lock nut 922, make the clearance between rocking arm 92 and the valve 91 be located the settlement within range, satisfy the application requirement, and improve the adjustment efficiency of valve clearance.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An adjusting device for adjusting a valve clearance between a rocker arm and a valve in an engine assembly, the engine assembly further comprising a crankshaft for driving the rocker arm to swing, an adjusting screw arranged on the rocker arm and used for adjusting the valve clearance, and a lock nut for locking the adjusting screw, the adjusting device comprising:

a body assembly;

the sliding table assembly is assembled on the machine body assembly in a sliding mode and slides along the vertical direction;

the tightening and detecting module is arranged on the sliding table assembly and comprises a gap detecting assembly, a screw servo tightening assembly and a locking nut servo tightening assembly, wherein the gap detecting assembly can slide relative to the sliding table assembly along the vertical direction and is used for detecting the displacement of the rocker arm in the vertical direction;

a platform assembly located below the tightening and detection module and configured to support the engine assembly;

and the crankshaft driving assembly is arranged on the machine body assembly and is used for driving the crankshaft to rotate so as to enable the valve to be in a closed state.

2. The adjustment device of claim 1, wherein the gap detection assembly comprises:

a support structure disposed on the skid assembly;

and the sensor component is assembled on the supporting structure and used for abutting against the upper end surface of the rocker arm so as to detect the displacement of the rocker arm in the vertical direction.

3. The adjustment device of claim 2, wherein the sensor assembly comprises:

a displacement sensor disposed on the support structure;

one end of the detection rod is pressed against the displacement sensor, and the other end of the detection rod is pressed against the upper end face of the rocker arm;

wherein, the displacement sensor is sleeved with a compression spring used for pressing the detection rod.

4. The adjustment device of claim 3, wherein an end of the detection rod facing the engine block is a spherical surface that contacts an upper end surface of the rocker arm when the detection rod is pressed against the rocker arm.

5. The adjusting device of any one of claims 1-4, wherein a latch positioning device is further provided on the slide assembly for pressing and positioning the motor assembly.

6. The adjustment device of claim 5, wherein said latch positioning means comprises:

the floating mounting plate is assembled on the sliding table assembly in a floating mode;

the pressing block is arranged on the floating mounting plate and used for pressing against the engine assembly;

the floating installation plate is provided with a positioning hole, and the sliding table assembly is provided with a bolt for inserting into the positioning hole.

7. The adjustment device of any one of claims 1-4, wherein the tightening and detection module is slidably mounted on the skid assembly, and the tightening and detection module is slidable in a horizontal direction relative to the skid assembly.

8. The adjusting device of claim 7, wherein the sliding table assembly is further provided with a displacement servo assembly for driving the tightening and detecting module to slide in a horizontal direction relative to the sliding table assembly.

9. The adjustment device of any one of claims 1-4, wherein the lock nut servo-tightening assembly includes a nut anti-rotation sleeve for securing the lock nut.

10. The adjustment device of any one of claims 1-4, wherein said crankshaft drive assembly is slidably mounted to said body assembly.

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