Measuring head floating mechanism

Abstract

The utility model belongs to the technical field of engine shell shaft hole detection, and particularly relates to a measuring head floating mechanism, which comprises a mounting seat, a guide sleeve vertically fixed on the mounting seat, a guide shaft arranged in the guide sleeve in a sliding manner, and a bearing seat positioned at the upper end of the guide sleeve, a pneumatic measuring head is mounted on the measuring head mounting shaft, the lower end of the measuring head mounting shaft penetrates through the bearing seat, and movable bearings are arranged between the upper end and the lower end, penetrating through the bearing seat, of the measuring head mounting shaft and the bearing seat; through the arranged axial floating part, self-adaptive floating can be realized according to the error of the shaft hole in the engine shell detection process, and the abrasion between the detection head and the shaft hole is effectively reduced; and secondly, the proximity switch and the sensing block are arranged between the guide shaft and the bottom of the mounting seat, and under the cooperation with the axial spring, large position deviation can be detected in advance, so that the damage interference caused by forcibly driving the inspection room measuring head by the electric cylinder is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of engine casing shaft hole detection, and in particular relates to a probe floating mechanism. Background Art

[0002] The automobile engine housing is an important part of the engine and is usually made of materials such as cast iron or aluminum alloy. Its main function is to support and fix various components inside the engine, such as cylinders, pistons, crankshafts, etc., and at the same time withstand various forces and heat generated when the engine is working.

[0003] After the shell is produced, various tests are required to ensure the quality. The shaft hole test is one of them. The accuracy of the shaft hole is an important link to ensure assembly accuracy and product quality. Previously, most OEMs adopted a random inspection system. The first piece and the intervals were checked on the three-coordinate system. This would lead to low efficiency, high cost, heavy workload for on-site personnel, and the inspection rate could not reach 100%, resulting in accidental quality problems such as occasional missed inspections, which may cause driving safety problems for end users, and serious recalls may cause large-scale recalls;

[0004] With the continuous improvement and progress of automobile engine technology, advanced OEMs adopt QA quality online inspection, cancel the traditional quality spot check, and use pneumatic detection technology to detect the size of the hole and shaft on the shell. Driven by the electric cylinder, the pneumatic probe moves to the hole or shaft, stops at the position to be detected, and is first purged and then pneumatically measured. The pneumatic micrometer is used for calculation to obtain the tolerance of the hole or shaft diameter. However, due to the errors in shell casting and processing, the position of the hole or shaft is not good, which causes the probe to scratch the hole or shaft.

[0005] In order to solve the above problems, a probe floating mechanism is proposed in the present application. Utility Model Content

[0006] In order to solve the above problems existing in the prior art, the utility model provides a probe floating mechanism, which has the characteristics of reducing the wear and abrasion between the side head and the shaft hole of the housing.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a probe floating mechanism, comprising a mounting seat and a guide sleeve vertically fixed on the mounting seat, and a guide shaft slidably arranged inside the guide sleeve, and also comprising a bearing seat located at the upper end of the guide sleeve, the bearing seat is provided with a side head mounting shaft, a pneumatic probe is installed on the side head mounting shaft, the lower end of the side head mounting shaft passes through the bearing seat, and movable bearings are arranged between the upper and lower ends of the side head mounting shaft passing through the bearing seat and the bearing seat, the bearing seat and the side head mounting shaft are axially movably connected by two movable bearings and a nut, and the bearing seat is provided with a movable bearing. There is a gap for axial movement of the side head mounting shaft, and an axial reset component is also provided between the bearing seat and the side head mounting shaft. The top of the guide sleeve is fixed to the bottom of the bearing seat, and the outer sleeve between the bottom of the bearing seat and the guide sleeve is provided with an axial spring. A proximity switch is installed at the bottom of the mounting seat through a bracket, and a sensing block that cooperates with the proximity switch is installed at the bottom of the guide shaft. A limited position clamping sleeve is provided between the bottom of the guide sleeve and the guide shaft; the movable bearing includes a seat ring and a shaft ring, and a No. 1 steel ball arranged between the seat ring and the shaft ring, and the seat ring, the shaft ring, and the No. 1 steel ball are a detachable split structure.

[0008] As a preferred technical solution of the utility model, the reset component includes a bevel slot nut and a flat nut arranged on the outside of the bearing seat, and a through hole axially opened along one end of the bearing seat, a radial spring is arranged in the through hole, a No. 2 steel ball is arranged at one end of the radial spring close to the side head mounting shaft, and a contact pin is arranged at the other end of the radial spring.

[0009] As a preferred technical solution of the utility model, the No. 2 steel ball and the contact pin are also located in the axial through hole, the No. 2 steel ball is elastically in contact with the side head mounting shaft through a radial spring, and the contact pin is elastically in contact with the inner inclined surface of the bevel slot nut through a radial spring.

[0010] As a preferred technical solution of the utility model, the side head mounting shaft is automatically reset to be coaxial with the bearing seat through the elasticity of the radial spring.

[0011] As a preferred technical solution of the utility model, the bevel slot nut and the flat nut are both installed on the outside of the bearing seat by means of a screw, and the bevel slot nut is screw-locked on the outside of the bearing seat by means of the screw of the flat nut.

[0012] As an optimal technical solution of the utility model, the outer side of the seat ring is fixedly installed with the bearing seat, the inner side of the shaft ring is fixedly installed with the side head mounting shaft, the inner side of the seat ring is provided with a movable space for the side head mounting shaft, and the bearing seat is provided with a movable space for the shaft ring.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The axial floating component can be set to float adaptively according to the error of the shaft hole during the engine housing inspection process, effectively reducing the wear between the inspection head and the shaft hole;

[0015] Secondly, a proximity switch and a sensing block are arranged between the guide shaft and the bottom of the mounting seat. In cooperation with the axial spring, large position deviations can be detected in advance to avoid damaging interference caused by the electric cylinder forcibly driving the detection probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a structural schematic diagram of the main view of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the utility model from the side;

[0019] Figure 3 It is a schematic diagram of the structure of the movable bearing and its connecting part in the utility model;

[0020] In the figure: 1. Mounting seat; 2. Guide sleeve; 3. Guide shaft; 4. Bearing seat; 5. Side head mounting shaft; 6. Pneumatic probe; 7. Movable bearing; 71. Seat ring; 72. Shaft ring; 73. No. 1 steel ball; 8. No. 2 steel ball; 9. Radial spring; 10. Contact pin; 11. Bevel slot nut; 12. Flat nut; 13. Axial spring; 14. Proximity switch; 15. Induction block; 16. Limit clamp. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example

[0023] See also Figure 1-3The utility model provides the following technical solutions: a probe floating mechanism, including a mounting seat 1 and a guide sleeve 2 vertically fixed on the mounting seat 1, and a guide shaft 3 slidably arranged inside the guide sleeve 2, and also including a bearing seat 4 located at the upper end of the guide sleeve 2, a side head mounting shaft 5 is arranged on the bearing seat 4, a pneumatic probe 6 is installed on the side head mounting shaft 5, the lower end of the side head mounting shaft 5 passes through the bearing seat 4, and movable bearings 7 are arranged between the upper and lower ends of the side head mounting shaft 5 passing through the bearing seat 4 and the bearing seat 4, the bearing seat 4 and the side head mounting shaft 5 are axially movably connected through two movable bearings 7 and a nut, the bearing seat 4 is provided with a gap for the axial movement of the side head mounting shaft 5, an axial resetting component is also arranged between the bearing seat 4 and the side head mounting shaft 5, and the top of the guide sleeve 2 is connected to the bearing seat 4 is fixed at the bottom, an axial spring 13 is provided on the outer sleeve between the bottom of the bearing seat 4 and the guide sleeve 2, a proximity switch 14 is installed at the bottom of the mounting seat 1 through a bracket, a sensing block 15 matched with the proximity switch 14 is installed at the bottom of the guide shaft 3, a limited position clamping sleeve 16 is arranged between the bottom of the guide sleeve 2 and the guide shaft 3, the movable bearing 7 includes a seat ring 71 and a shaft ring 72, and a No. 1 steel ball 73 arranged between the seat ring 71 and the shaft ring 72, and the seat ring 71, the shaft ring 72, and the No. 1 steel ball 73 are detachable split structures. The split structure of the movable bearing 7 in this embodiment not only ensures the connection reliability of the bearing seat 4 and the side head mounting shaft 5, but also provides an axial movable gap, so as to realize the deviation matching between the detection head and the housing shaft hole and reduce the wear caused by the deviation.

[0024] Specifically, the reset component includes a bevel nut 11 and a flat nut 12 arranged outside the bearing seat 4, and a through hole axially opened along one end of the bearing seat 4, a radial spring 9 is arranged in the through hole, a No. 2 steel ball 8 is arranged at one end of the radial spring 9 close to the side head mounting shaft 5, and a contact pin 10 is arranged at the other end of the radial spring 9.

[0025] Specifically, the No. 2 steel ball 8 and the contact pin 10 are also located in the axial through hole, the No. 2 steel ball 8 is elastically in contact with the side head mounting shaft 5 through the radial spring 9, the contact pin 10 is elastically in contact with the inner inclined surface of the bevel nut 11 through the radial spring 9, and the side head mounting shaft 5 is automatically reset to be coaxial with the bearing seat 4 through the elasticity of the radial spring 9. The cooperation of the radial spring 9, the No. 2 steel ball 8 and the contact pin 10 in this embodiment can not only ensure the flexibility of the bearing seat 4 and the side head mounting shaft 5, but also start the reset, which is convenient for the detection work.

[0026] Specifically, the bevel nut 11 and the flat nut 12 are both installed on the outside of the bearing seat 4 by means of screws, and the bevel nut 11 is screw-locked on the outside of the bearing seat 4 by means of the flat nut 12. In this embodiment, the connection and locking are carried out by means of threads, which has the advantages of easy production, assembly and disassembly.

[0027] Specifically, the outer side of the seat ring 71 is fixedly installed with the bearing seat 4, and the inner side of the shaft ring 72 is fixedly installed with the side head mounting shaft 5. The inner side of the seat ring 71 is provided with a movable space for the side head mounting shaft 5, and the bearing seat 4 is provided with a movable space for the shaft ring 72. Figure 3 As shown, a recessed groove for limiting the No. 1 steel ball 73 is provided on the No. 1 steel ball 73. When the side head mounting shaft 5 and the bearing seat 4 form an eccentricity, the No. 1 steel ball 73 will roll on the seat ring 71, and the side head mounting shaft 5 moves in the gap between the seat ring 71 and the bearing seat 4, and the shaft ring 72 moves in the gap inside the bearing seat 4. It has the advantages of simple construction, high reliability and flexibility.

[0028] The working principle and use process of the utility model: the detection head on the pneumatic probe 6 is driven upward by the electric cylinder to detect the shaft hole on the engine housing. When there is a position deviation between the detection head and the shaft hole, the pneumatic probe 6 will follow the axial movement of the shaft hole. At this time, the radial spring 9 is compressed and follows the action. The side head installation shaft 5, the pneumatic probe 6 and the bearing seat 4 form an eccentric distribution, which plays a role in reducing the wear between the detection head and the shaft hole.

[0029] When the shaft hole position deviation is too large, the detection head cannot enter the shaft hole. At this time, the axial spring 13 will be compressed, and the guide shaft 3 will be forced to move downward in the guide sleeve 2 under the action of the extension force of the pneumatic probe 6. At this time, the proximity switch 14 and the sensor block 15 form an induction, indicating that the shaft hole of the engine housing does not meet the requirements, thereby avoiding damage to the detection mechanism or the housing due to the continued operation of the electric cylinder.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A probe floating mechanism, comprising a mounting seat (1), a guide sleeve (2) vertically fixed on the mounting seat (1), and a guide shaft (3) slidably arranged inside the guide sleeve (2), characterized in that: It also includes a bearing seat (4) located at the upper end of the guide sleeve (2), the bearing seat (4) is provided with a side head mounting shaft (5), the side head mounting shaft (5) is installed with a pneumatic probe (6), the lower end of the side head mounting shaft (5) passes through the bearing seat (4), and the upper and lower ends of the side head mounting shaft (5) passing through the bearing seat (4) are provided with movable bearings (7) between the bearing seat (4), the bearing seat (4) and the side head mounting shaft (5) are axially movably connected through two movable bearings (7) and a nut, and the bearing seat (4) is provided with a side head mounting shaft for the side head mounting shaft. (5) an axial movable gap, an axial reset component is also provided between the bearing seat (4) and the side head mounting shaft (5), the top of the guide sleeve (2) is fixed to the bottom of the bearing seat (4), an external sleeve between the bottom of the bearing seat (4) and the guide sleeve (2) is provided with an axial spring (13), a proximity switch (14) is installed at the bottom of the mounting seat (1) through a bracket, a sensing block (15) matched with the proximity switch (14) is installed at the bottom of the guide shaft (3), and a limit clamping sleeve (16) is provided between the bottom of the guide sleeve (2) and the guide shaft (3); The movable bearing (7) comprises a seat ring (71), a shaft ring (72), and a No. 1 steel ball (73) arranged between the seat ring (71) and the shaft ring (72); the seat ring (71), the shaft ring (72), and the No. 1 steel ball (73) are a detachable split structure.

2. A probe floating mechanism according to claim 1, characterized in that: The reset component comprises a bevel nut (11) and a flat nut (12) arranged outside the bearing seat (4), and a through hole axially opened along one end of the bearing seat (4), a radial spring (9) being arranged in the through hole, a No. 2 steel ball (8) being arranged at one end of the radial spring (9) close to the side head mounting shaft (5), and a contact pin (10) being arranged at the other end of the radial spring (9).

3. A probe floating mechanism according to claim 2, characterized in that: The No. 2 steel ball (8) and the contact pin (10) are also located in the axial through hole. The No. 2 steel ball (8) is in elastic contact with the side head mounting shaft (5) through a radial spring (9), and the contact pin (10) is in elastic contact with the inner inclined surface of the bevel nut (11) through a radial spring (9).

4. A probe floating mechanism according to claim 3, characterized in that: The side head mounting shaft (5) is automatically reset to be coaxial with the bearing seat (4) through the elasticity of the radial spring (9).

5. The probe floating mechanism according to claim 2, characterized in that: The bevel slot nut (11) and the flat nut (12) are both installed on the outside of the bearing seat (4) by means of a screw thread, and the bevel slot nut (11) is screw-locked on the outside of the bearing seat (4) by means of the screw thread of the flat nut (12).

6. A probe floating mechanism according to claim 1, characterized in that: The outer side of the seat ring (71) is fixedly mounted on the bearing seat (4), and the inner side of the shaft ring (72) is fixedly mounted on the side head mounting shaft (5). The inner side of the seat ring (71) is provided with a movable space for the side head mounting shaft (5), and the bearing seat (4) is provided with a movable space for the shaft ring (72).

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