CN210603220U

CN210603220U - Engine cylinder cylindricity detection device

Info

Publication number: CN210603220U
Application number: CN201922063754.2U
Authority: CN
Inventors: 龙云泽; 封进
Original assignee: Guilin University of Aerospace Technology
Current assignee: Guilin University of Aerospace Technology
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-05-22
Anticipated expiration: 2029-11-26

Abstract

The utility model relates to an engine cylinder cylindricity detection device, which comprises a guide block, two measuring heads, two supports, a first driving mechanism and a second driving mechanism; the upper ends of the two brackets are oppositely arranged on the guide block in a horizontally sliding manner, and the lower ends of the two brackets are attached to the inner wall of the cylinder; the two measuring heads are respectively fixed on the two brackets in a horizontal opposite mode; the first driving mechanism is connected with and drives the guide block to rotate so as to drive the support to rotate synchronously, and the second driving mechanism is connected with and drives the first driving mechanism to move up and down so as to drive the guide block and the support to move up and down synchronously, so that the support can move up and down while rotating so as to detect the cylindricity of the cylinder through the measuring head. The device can realize the quick high accuracy measurement to engine cylinder cylindricity to have small, simple to operate, advantage that the reliability is high, compared with prior art, practiced thrift the cost greatly, have fine using value.

Description

Engine cylinder cylindricity detection device

Technical Field

The utility model relates to a cylinder cylindricity detection area, concretely relates to engine cylinder cylindricity detection device.

Background

The cylinder cylindricity influences the performance of various items of the engine, such as vibration, noise, power output and the like, and is a vital performance index of the engine. The cylinder cylindricity detection method commonly used at present is mainly a mechanical type meter-making measurement method, the precision is not enough, the measurement is slow, and a large manual operation error exists in the measurement process every time. Professional engine manufacturers often adopt a three-coordinate measuring instrument to detect the cylindricity of the cylinder, but the cylinder cylindricity detection device is difficult to widely popularize and apply due to the defects of expensive equipment, large weight and size, inconvenience in carrying and the like.

At present, in order to solve the problem, when the cylindricity deformation of the engine cylinder is accurately evaluated, the engine cylinder needs to be returned to a factory for detection, so that the overhaul procedure is complex, the period is long, and the cost is high. For some vehicles with low requirements on precision, cylindricity measurement of an engine cylinder is generally carried out by a vernier caliper by experienced technicians, and the method has the defects of complex measurement steps, certain damage to a measurement surface, low speed, insufficient precision and the like.

SUMMERY OF THE UTILITY MODEL

To sum up, for overcoming prior art's not enough, still require the device small simultaneously, convenient operation, it is with low costs, the utility model aims to solve the technical problem that an engine cylinder cylindricity detection device is provided.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a cylinder cylindricity detection device of an engine comprises a guide block, two measuring heads, two supports, a first driving mechanism and a second driving mechanism; the upper ends of the two brackets are oppositely arranged and can be horizontally arranged on the guide block in a sliding and positioning way, and the lower ends of the two brackets extend downwards and then enter the cylinder and cling to the inner wall of the cylinder; the two measuring heads are respectively fixed on the two brackets in a horizontal opposite mode; the first driving mechanism is connected with the guide block and drives the guide block to rotate so as to drive the support to rotate synchronously, the second driving mechanism is connected with the first driving mechanism and drives the first driving mechanism to move up and down so as to drive the guide block and the support to move up and down synchronously, and therefore the support can move up and down while rotating so as to detect the cylindricity of the cylinder through the measuring head.

The utility model has the advantages that: the cylinder accuracy of the engine cylinder can be measured quickly and accurately, and the measuring device has the advantages of small size, convenience in installation and high reliability, greatly saves cost and has good application value compared with the prior art.

On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:

furthermore, the device also comprises a plurality of connecting columns which are arranged at intervals up and down and extend horizontally; the two ends of the connecting column penetrate through the two corresponding positions of the supports respectively and then are connected with limiting check rings, springs are sleeved on the connecting column and correspond to the positions, away from one side of the limiting check rings, of the supports, the two ends of each spring respectively abut against the shoulder structures on the connecting column and the corresponding supports, and therefore the lower ends of the supports are attached to the inner walls of the cylinders.

The beneficial effect of adopting the further scheme is that: the lower end of the support is guaranteed to be attached to the inner wall of the cylinder at any time in the measuring process, and therefore accuracy of the measuring result is guaranteed.

Furthermore, the lower end of the support horizontally extends outwards for a preset distance and then is attached to the inner wall of the cylinder.

The beneficial effect of adopting the further scheme is that: the support and the inner wall of the cylinder are in point contact in the measuring process, so that the defect that the measuring accuracy is low due to the fact that the whole support is in contact with the inner wall of the cylinder is avoided.

Furthermore, the lower end of the support is of a spherical structure tangent to the inner wall of the cylinder.

The beneficial effect of adopting the further scheme is that: and the friction between the bracket and the inner wall of the cylinder in the measuring process is reduced.

Further, the first driving mechanism comprises a first servo motor and a rotating shaft; the first servo motor is located above the guide block, and the output end of the first servo motor faces downwards and is connected with the guide block through the rotating shaft and drives the guide block to rotate.

Further, the second driving mechanism comprises a base, a second servo motor, a screw rod and a sliding block; the second servo motor is fixed on the base, and the output end of the second servo motor is arranged upwards; the screw rod is vertically connected to the output end of the second servo motor, the sliding block is installed on the screw rod in a threaded mode, and the sliding block is fixedly connected with the first servo motor through a connecting rod.

The beneficial effect of adopting the further scheme is that: the measuring head is driven by the two servo motors to rotate at the same time of moving downwards at a constant speed, and then omnibearing and accurate measurement is carried out along with the cylinder.

Further, the system also comprises a detection processor and a computer; the computer is in wireless connection with the first servo motor and the second servo motor, the detection processor is in wireless connection with the measuring head, and the computer is connected with the detection processor through a data line.

The beneficial effect of adopting the further scheme is that: and calculating to obtain a measurement result.

Further, the measuring head is a Doppler laser measuring head.

The beneficial effect of adopting the further scheme is that: the Doppler laser measuring head has high-precision performance, can achieve the effect of quickly and accurately measuring the cylindricity of the cylinder, is mature in Doppler laser ranging technology, and has the advantages of low manufacturing cost, long service life and convenience in maintenance.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the device comprises a guide block, 2, a measuring head, 3, a support, 4, a limiting ring, 5, a spring, 6, a first servo motor, 7, a rotating shaft, 8, a base, 9, a second servo motor, 10, a screw rod, 11, a sliding block, 12, a connecting rod, 13, a detection processor, 14, a computer, 15, a data line, 16, a connecting column, 17 and a cylinder.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, the device for detecting the cylindricity of an engine cylinder 17 comprises a guide block 1, two measuring heads 2, two brackets 3, a first driving mechanism, a second driving mechanism, a detection processor 13 and a computer 14. Preferably: the measuring head 2 is a Doppler laser measuring head 2, the Doppler laser measuring head has high-precision performance, the measuring effect of quickly and accurately measuring the cylinder cylindricity can be achieved, and the Doppler laser ranging technology is mature, and the measuring head has the advantages of low manufacturing cost, long service life and convenience in maintenance. The upper ends of the two brackets 3 are oppositely arranged and can be horizontally arranged on the guide block 1 in a sliding and positioning way, and the lower ends of the brackets extend downwards and then enter the cylinder 17 and cling to the inner wall of the cylinder 17. The two measuring heads 2 are respectively and horizontally fixed on the two brackets 3 in an opposite mode. The first driving mechanism is connected with the guide block 1 and drives the guide block 1 to rotate so as to drive the support 3 to rotate synchronously, the second driving mechanism is connected with the first driving mechanism and drives the first driving mechanism to move up and down so as to drive the guide block 1 and the support 3 to move up and down synchronously, and then the support 3 can move up and down while rotating so as to detect the cylindricity of the cylinder 17 through the measuring head 2. The computer 14 is wirelessly connected to the first servo motor 6 and the second servo motor 9, the detection processor 13 is wirelessly connected to the stylus 2, and the computer 14 is connected to the detection processor 13 via a data line 15. The measuring head 13 is provided with a wireless transmitting module, and the detection processor 13 is provided with a wireless receiving module, so that the information data is wirelessly transmitted between the detection processor 13 and the measuring head 2. Similarly, the computer 14 is provided with a wireless transmitting module, the first servo motor 6 and the second servo motor 9 are provided with wireless receiving modules, the computer 14 sends instructions to the wireless receiving modules of the first servo motor 6 and the second servo motor 9 through the wireless transmitting modules, and then the computer 14 controls the output of the first servo motor 6 and the second servo motor 9. The first servo motor 6 and the second servo motor 9 output to drive the measuring head 2 to move according to the expected speed and track, the detection processor 13 receives the measurement data of the measuring head 2 and transmits the measurement data to the computer 14, and the computer 14 finally calculates the measurement result according to the measurement data.

The detection device further comprises a plurality of connecting columns 16 which are arranged at intervals up and down and extend horizontally. The two ends of the connecting column 16 penetrate through the two corresponding positions of the supports 3 and then are connected with limiting check rings 4, springs 5 are sleeved on the connecting column 16 corresponding to the positions, away from one sides of the limiting check rings 4, of the supports 3, the two ends of each spring 5 respectively abut against the shoulder structures on the connecting column 16 and the corresponding supports 3, and therefore the lower ends of the supports 3 are attached to the inner walls of the cylinders 17. Under the action of the elastic force of the spring 5, the lower ends of the two supports 3 are attached to the inner wall of the cylinder 17 at any time in the measuring process, so that the accurate cancellation of the measurement is ensured. In addition, the support 3 and the inner wall of the cylinder 17 are in point contact in the measuring process, so that the defect of low measuring accuracy caused by the fact that the whole support 3 is in contact with the inner wall 17 of the cylinder is avoided. The lower end of the bracket 3 horizontally extends to the outer side of the cylinder 17 for a preset distance and then is attached to the inner wall of the cylinder 17, preferably: the lower end of the bracket 3 is of a sphere structure tangent with the inner wall of the cylinder 17. The lower end of the bracket 3 is of a spherical structure, and the contact area of the lower end of the bracket 3 and the inner wall of the cylinder 17 is small, so that the friction between the bracket 3 and the inner wall of the cylinder 17 in the measuring process is reduced.

The first driving mechanism comprises a first servo motor 6 and a rotating shaft 7. The first servo motor 6 is located above the guide block 1, the output end of the first servo motor faces downwards and is connected with the guide block 1 through the rotating shaft 7 and drives the guide block 1 to rotate. The second driving mechanism comprises a base 8, a second servo motor 9, a screw rod 10 and a sliding block 11. The output end of the second servo motor 9 is upwards fixed on the base 8, and the output end of the second servo motor is upwards arranged. The screw rod 10 is vertically connected to the output end of the second servo motor 9, the sliding block 11 is installed on the screw rod 10 in a threaded mode, and the sliding block 11 is fixedly connected with the first servo motor 6 through a connecting rod 12. The output of the first servo motor 6 drives the guide block 1 to rotate through the rotating shaft 7, and the guide block 1 rotates and simultaneously drives the support 2 and the measuring head 3 to synchronously rotate, so that the measuring head 3 rotates. When the measuring head 3 rotates, the second servo motor 6 outputs and drives the screw rod 10 to rotate, the screw rod 10 rotates, the sliding block 11 cannot rotate (the sliding block 11 is fixedly connected with the first servo motor 6 through the connecting rod 12, and the first servo motor 6 cannot rotate) to move up and down, the sliding block 11 can drive the first servo motor 6 to synchronously move downwards after moving downwards, and the support 2 and the measuring head 3 synchronously move downwards after the first servo motor 6 moves downwards. Therefore, in the measuring process, the first servo motor 6 and the second servo motor 9 are started simultaneously to drive the measuring head 3 to rotate and move downwards, and finally the two servo motors drive the measuring head 3 to rotate at the same time of moving downwards at a constant speed, so that the cylinder 17 is subjected to all-dimensional accurate measurement.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The engine cylinder cylindricity detection device is characterized by comprising a guide block (1), two measuring heads (2), two supports (3), a first driving mechanism and a second driving mechanism; the upper ends of the two brackets (3) are oppositely arranged and can be horizontally arranged on the guide block (1) in a sliding and positioning way, and the lower ends of the brackets extend downwards and then enter the cylinder (17) and are attached to the inner wall of the cylinder (17); the two measuring heads (2) are respectively and horizontally fixed on the two brackets (3) in an opposite way; the first driving mechanism is connected with the guide block (1) and drives the guide block (1) to rotate so as to drive the support (3) to rotate synchronously, the second driving mechanism is connected with the first driving mechanism and drives the first driving mechanism to move up and down so as to drive the guide block (1) and the support (3) to move up and down synchronously, and then the support (3) can move up and down while rotating so as to detect the cylindricity of the cylinder (17) through the measuring head (2).

2. The engine cylinder cylindricity detecting device according to claim 1, further including a plurality of connecting posts (16) spaced apart from each other in an up-down direction and extending horizontally; the both ends of spliced pole (16) are passed two respectively be connected with spacing retaining ring (4) behind the corresponding position of support (3) on spliced pole (16) and correspond support (3) are kept away from the position cover of spacing retaining ring (4) one side is equipped with spring (5), and the both ends of spring (5) are supported respectively shoulder structure and corresponding on spliced pole (16) support (3), and then make the inner wall of cylinder (17) is pasted to the lower extreme of support (3).

3. The engine cylinder cylindricity detecting device according to claim 1, characterized in that the lower end of the bracket (3) is extended horizontally outward a predetermined distance and then stuck against the inner wall of the cylinder (17).

4. The engine cylinder cylindricity detecting device according to claim 1, characterized in that the lower end of the bracket (3) is a spherical structure tangential to the inner wall of the cylinder (17).

5. The engine cylinder cylindricity detecting device according to claim 1, characterized in that said first driving mechanism includes a first servo motor (6) and a rotating shaft (7); the first servo motor (6) is located above the guide block (1), and the output end of the first servo motor faces downwards and is connected with the guide block (1) through the rotating shaft (7) and drives the guide block (1) to rotate.

6. The engine cylinder cylindricity detecting device according to claim 5, characterized in that said second driving mechanism comprises a base (8), a second servomotor (9), a lead screw (10) and a slider (11); the second servo motor (9) is fixed on the base (8), and the output end of the second servo motor is arranged upwards; the screw rod (10) is vertically connected to the output end of the second servo motor (9), the sliding block (11) is installed on the screw rod (10) in a threaded mode, and the sliding block (11) is fixedly connected with the first servo motor (6) through a connecting rod (12).

7. The engine cylinder cylindricity detecting device according to claim 6, characterized in that said detecting device further includes a detecting processor (13) and a computer (14); the computer (14) is wirelessly connected with the first servo motor (6) and the second servo motor (9), the detection processor (13) is wirelessly connected with the measuring head (2), and the computer (14) is connected with the detection processor (13) through a data line (15).

8. The engine cylinder cylindricity detecting device according to any one of claims 1 to 7, characterized in that said probe (2) is a Doppler laser probe (2).