CN111060243A

CN111060243A - Automatic detection device and detection method for shield hob torque

Info

Publication number: CN111060243A
Application number: CN201911283964.0A
Authority: CN
Inventors: 杜水明; 何鑫; 曾剑; 牛迎春; 杨庆
Original assignee: Zhuzhou CRRC Timly Forge Co Ltd
Current assignee: Zhuzhou CRRC Timly Forge Co Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-04-24

Abstract

The invention discloses an automatic detection device for the torque of a shield hobbing cutter, which comprises a tray assembly for supporting a cutter shaft for placing the shield hobbing cutter and driving the cutter shaft to rotate, wherein a driving mechanism for driving the tray assembly to rotate is connected to the tray assembly, a torque measuring instrument for measuring the rotation torque of the cutter shaft is arranged between the driving mechanism and the tray assembly, and a clamping mechanism for tightly pressing and fixing a cutter ring of the shield hobbing cutter to prevent the cutter ring from rotating is also arranged on the side surface of the shield hobbing cutter. The invention also discloses a detection method which comprises the steps of placing the shield hob, pressing the cutter ring tightly, then starting the driving mechanism to drive the cutter shaft to rotate, measuring the starting torque and the like. The invention has the advantages of high automation degree, high detection efficiency, low labor intensity, high detection precision, good universality and the like.

Description

Automatic detection device and detection method for shield hob torque

Technical Field

The invention belongs to the technical field of shield machine cutter detection, and particularly relates to an automatic detection device and a detection method for shield machine hob torque.

Background

The torque of the shield hob directly influences the use of the hob, if the starting torque is too large, the hob is prone to eccentric wear, the starting torque is too small, and a hob bearing is prone to scattering, so that it is very important to detect the starting torque of the shield hob before delivery. At present, the starting torque detection of the shield hob mainly depends on a simple tool and a torque wrench, and the starting torque detection is carried out in a way of manually twisting the torque wrench, for example, patent document No. CN201844899U discloses a shield machine hob torque detection device, when the device is used, a hob shaft is fixed, a nut is clamped by a dial type manual torque wrench to rotate, and therefore the torque is measured. The mode has low automation degree, low production efficiency, high labor intensity of staff and large influence of the staff on detection results.

The patent document No. CN106052765A discloses a shield machine hobbing cutter dynamic detection device, the device drives the cutter ring of hobbing cutter to rotate through a transmission groove to detect the torque of the hobbing cutter, the essence is that a detection tool and a torque wrench are changed into a motor to drive a driving wheel and further drive the cutter ring to rotate on the basis of manual detection to carry out torque detection, although the motor is used for replacing partial manual operation, the improvement of production efficiency and labor intensity of workers is not obvious, the automation degree is not high, the manual operation such as adjusting, moving, fastening and the like is needed to be carried out on a moving platform, and the manual operation factors such as whether the driving wheel groove is completely matched with the hobbing cutter ring or not, whether the platform is fixed or not are firm and the like can cause different degrees of influence on the detection result, and further the detection precision is directly influenced. In addition, the friction force of the driving wheel drives the cutter ring rotating mode, on one hand, the friction force is selected to be very large, the friction force is too low, the cutter ring cannot rotate, the high accuracy of a starting torque detection result can be influenced, the shape and the friction force of the driving wheel on the other hand are matched with the shield hob, the cutter ring shape and the structure of the shield hob are various, the universality of the device is poor, the driving wheel needs to be frequently replaced according to the difference of the cutter ring, the use is inconvenient, and the production efficiency is low.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects in the prior art, and provide an automatic detection device and a detection method capable of automatically detecting the torque of the shield hob.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

the utility model provides an automatic checkout device of shield structure hobbing cutter moment of torsion, automatic checkout device is including being used for supporting the arbor of placing the shield structure hobbing cutter and drive the tray subassembly of arbor rotation, be connected with on the tray subassembly and be used for the drive the rotatory actuating mechanism of tray subassembly, be equipped with between actuating mechanism and the tray subassembly and be used for measuring the torque measurement appearance of the rotatory moment of torsion of arbor, the side of shield structure hobbing cutter still is equipped with and is used for compressing tightly fixedly the cutter ring of shield structure hobbing cutter is in order to prevent the rotatory clamping mechanism of cutter ring.

The automatic detection device is preferable, the tray assembly comprises a tray base and a detection tray, the tray base is connected with the driving mechanism through the torque measuring instrument, the detection tray is detachably and fixedly arranged on the tray base, a groove for placing the cutter shaft is formed in the detection tray, and the groove is matched with the cutter shaft in shape.

The automatic detection device is preferably provided with a positioning structure between the tray base and the detection tray, the positioning structure comprises a positioning block and a positioning groove which are matched with each other, one of the positioning block and the positioning groove is arranged on the tray base, and the other one of the positioning block and the positioning groove is arranged on the detection tray.

In the automatic detection device, preferably, the positioning block is a hexagonal prism-shaped boss structure, the positioning groove is a hexagonal prism-shaped groove structure matched with the hexagonal prism-shaped boss structure, the positioning block is arranged on the detection tray, and the positioning groove is arranged on the tray base.

The automatic detection device is preferable, the driving mechanism comprises a driving motor and a spiral bevel gear speed reducing mechanism, one end of the spiral bevel gear speed reducing mechanism is connected with the driving motor, the other end of the spiral bevel gear speed reducing mechanism is connected with a coupler, a transmission shaft is further connected onto the coupler, and the transmission shaft is connected with the torque measuring instrument through a connecting flange.

The automatic detection device preferably further comprises a support, the support comprises a bottom plate and two side plates, the driving mechanism is fixedly arranged on the bottom plate, the two side plates are respectively and fixedly arranged on two sides of the bottom plate, a middle support plate is fixedly arranged between the two side plates, a through hole for the transmission shaft to pass through is formed in the middle support plate, and a bearing matched with the transmission shaft is arranged in the through hole.

In the above automatic detection device, preferably, the support is provided with a support frame for supporting the clamping mechanism, and the support frame is connected to the support through a height adjustment mechanism.

Preferably, the clamping mechanism comprises a clamping block and an air cylinder for driving the clamping block to move telescopically so as to clamp the cutter ring, the contact surface of the clamping block and the cutter ring is in an arc shape matched with the cutter ring, and the other surface of the clamping block is fixedly connected with a piston rod of the air cylinder.

In the automatic detection device, preferably, a plurality of anti-slip grooves are formed on the contact surface of the clamping block and the cutter ring.

As a general technical concept, the invention also provides a method for detecting the torque of the shield hobbing cutter by adopting the automatic detection device, which comprises the following steps,

s1, placing a cutter shaft of the shield hobbing cutter on the tray assembly, and then pressing a cutter ring of the shield hobbing cutter through a clamping mechanism, so that the shield hobbing cutter is fixed;

and S2, starting the driving mechanism to transmit the rotating power to the cutter shaft through the tray assembly, and measuring the starting torque of the shield hobbing cutter by the torque measuring instrument when the cutter shaft starts to rotate.

Compared with the prior art, the invention has the advantages that:

according to the automatic detection device and the detection method for the shield hob torque, the cutter shaft is supported and placed on the tray assembly, the cutter ring is clamped and fixed through the clamping mechanism, the tray assembly is driven to rotate through the driving mechanism so as to drive the cutter shaft to rotate, the rotating torque of the cutter shaft which starts to rotate is measured and recorded through the torque measuring instrument in the process, so that the automatic detection of the shield hob torque is realized, the detection process does not need manual operation, the rotation of the cutter shaft is realized through the driving mechanism, the measurement is automatically performed through the torque measuring instrument, the automation degree of the whole detection process is high, the production efficiency is high, the labor intensity of workers is greatly reduced, the influence of human factors on the detection result is eliminated, the automatic detection device and the detection method are suitable for large-batch production processes, and.

The detection of the starting torque of the shield hobbing cutter in the prior art is carried out by rotating the cutter ring, the detection mode has poor universality, the friction force for driving the cutter ring to rotate needs to be considered and influenced by various factors, and the friction force selection difficulty is high, but the invention adopts the cutter shaft of the shield hobbing cutter as an object for detection, and the detection is carried out by rotating the cutter shaft, thereby avoiding the adverse effects of difficult adjustment, influence on detection precision and the like of the friction force caused by the rotation of the friction force, and has the advantages of good universality, wide application range and the like, because the shape of the cutter shaft is unchanged for the shield hobbing cutter of the same type and is equivalent to a standard part, the appearance and the structure of the cutter ring need to be changed according to different using stratums, no matter how the cutter ring is changed by rotating the cutter shaft, the invention only needs to clamp and fix the annular cutter ring by using the clamping mechanism, and the change of the shape of the cutter ring does not influence the clamping mechanism, the friction force does not need to be recalculated and adjusted, so the universality is extremely strong, and the production efficiency is high. In addition, the detection device has the advantages of high automation degree, low labor intensity of manual operation, capability of reducing the influence of the manual operation on the detection result to the maximum extent, small volume, simple and compact structure, high detection precision and the like.

Drawings

Fig. 1 is a front view of the automatic detection device for shield hob torque of the present embodiment.

Fig. 2 is a plan view of the automatic detection device for shield hob torque of the present embodiment.

Fig. 3 is a schematic perspective view of the automatic detection device for shield hob torque in this embodiment.

Fig. 4 is a schematic structural view of the clamping block in the present embodiment.

Fig. 5 is a schematic perspective view of the shield hobbing cutter torque automatic detection device according to the embodiment after being disassembled.

Illustration of the drawings:

1. a tray assembly; 11. a tray base; 12. detecting the tray; 13. positioning blocks; 14. positioning a groove; 2. a drive mechanism; 21. a drive motor; 22. a spiral bevel gear reduction mechanism; 23. a coupling; 24. a drive shaft; 25. a connecting flange; 3. a torque measuring instrument; 4. a clamping mechanism; 41. a clamping block; 411. an anti-slip groove; 42. a cylinder; 5. a shield hob; 51. a cutter shaft; 52. a cutter ring; 6. a support; 61. a base plate; 62. a side plate; 63. a middle support plate; 64. a bearing; 65. a support frame.

Detailed Description

In order to facilitate understanding of the invention, the invention will be described more fully and in detail with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.

Example 1:

as shown in fig. 1 to 3, the automatic detection device for the torque of the shield hob of the present embodiment includes a tray assembly 1 for supporting a cutter shaft 51 on which the shield hob 5 is placed and driving the cutter shaft 51 to rotate, a driving mechanism 2 for driving the tray assembly 1 to rotate is connected to the tray assembly 1, a torque measuring instrument 3 for measuring the rotation torque of the cutter shaft 51 is disposed between the driving mechanism 2 and the tray assembly 1, and a clamping mechanism 4 for pressing and fixing a cutter ring 52 of the shield hob 5 to prevent the cutter ring 52 from rotating is further disposed on a side surface of the shield hob 5.

In this embodiment, tray assembly 1 includes tray base 11 and detection tray 12, and tray base 11 passes through torquemeter 3 and links to each other with actuating mechanism 2, and detection tray 12 can be dismantled fixedly and set up on tray base 11, is equipped with the recess that is used for laying arbor 51 on the detection tray 12, and the recess matches with arbor 51's shape. Because the tray base 11 and the detection tray 12 adopt the detachable structure and the detachable fixing mode, the detection tray 12 can be replaced correspondingly according to the different shield hobbing cutters 5, the adaptability of the detection device is improved, and the detection device is suitable for the detection process of the shield hobbing cutters 5 with various cutter shafts 51.

As shown in fig. 5, in this embodiment, a positioning structure is disposed between the tray base 11 and the detection tray 12, the positioning structure includes a positioning block 13 and a positioning groove 14 that are matched with each other, the positioning block 13 is a hexagonal prism-shaped boss structure, the positioning groove 14 is a hexagonal prism-shaped groove structure matched with the hexagonal prism-shaped boss structure, the positioning block 13 is disposed on the detection tray 12, and the positioning groove 14 is disposed on the tray base 11. Specifically, the tray base 11 and the detection tray 12 are connected through a hexagonal concave-convex structure and a bolt. The detection tray 12 and the tray base 11 are positioned and connected by adopting a hexagonal concave-convex structure in a hexagonal prism shape, so that the positions of the detection tray 12 and the cutter shaft 51 relative to the driving mechanism 2 and the torque measuring instrument 3 are accurate, and torque transmission can be more timely and accurate, thereby ensuring the accuracy of a detection result.

In this embodiment, the driving mechanism 2 includes a driving motor 21 and a spiral bevel gear speed reducing mechanism 22, one end of the spiral bevel gear speed reducing mechanism 22 is connected to the driving motor 21, the other end of the spiral bevel gear speed reducing mechanism 22 is connected to a coupler 23, the coupler 23 is further connected to a transmission shaft 24, and the transmission shaft 24 is connected to the torque measuring instrument 3 through a connecting flange 25. Specifically, the driving motor 21 is sequentially connected with the spiral bevel gear speed reducing mechanism 22, the coupler 23, the transmission shaft 24, the connecting flange 25 and the torque measuring instrument 3, the spiral bevel gear speed reducing mechanism 22, the coupler 23 and the transmission shaft 24 are connected through keys, and the connecting flange 25 and the transmission shaft 24 are connected through keys. The spiral bevel gear speed reducing mechanism 22 realizes the change of the power transmission direction by vertically arranging meshed gears, and provides driving force for the driving motor 21 which is horizontally arranged to convert the driving force into the driving force rotating in the vertical direction, thereby realizing the power output in the vertical direction, being beneficial to reducing the volume of the automatic detection device and improving the structure compactness.

In this embodiment, the automatic detection device further includes a support 6, the support 6 includes a bottom plate 61 and two side plates 62, the driving mechanism 2 is fixedly disposed on the bottom plate 61, the two side plates 62 are respectively and fixedly disposed on two sides of the bottom plate 61, an intermediate support plate 63 is fixedly disposed between the two side plates 62, a through hole for the transmission shaft 24 to pass through is disposed on the intermediate support plate 63, and a bearing 64 matched with the transmission shaft 24 is disposed in the through hole. Specifically, support 6 still includes a roof, bottom plate 61 is placed in the bottom surface, two blocks of curb plates 62 perpendicular to bottom plate 61 set up the both sides at bottom plate 61 along vertical direction, the roof is on a parallel with bottom plate 61 and sets up and connect two blocks of curb plates 62, bottom plate 61, the support 6 structure of rectangle is constituteed to two blocks of curb plates 62 and roof, the both ends of middle extension board 63 are passed through the bolt and are linked to each other with two blocks of curb plates 62 of support 6, the outer lane of bearing 64 is installed on middle extension board 63, the inner circle of bearing 64 is installed on transmission shaft 24. The middle support plate 63 plays a role in supporting and limiting the transmission shaft 24, so that accurate transmission of the rotary driving force is guaranteed, and the accuracy of a measuring result is further guaranteed.

In this embodiment, the support frame 6 is provided with a support frame 65 for supporting the clamping mechanism 4, and the support frame 65 is fixedly disposed on the support frame 6. Specifically, the supporting frame 65 is an L-shaped supporting plate, one side of the L-shaped supporting plate is fixedly connected with the bracket 6, and the other side of the L-shaped supporting plate is fixedly provided with the clamping mechanism 4. The support frame 65 is provided to facilitate installation of the clamping mechanism 4 to stably clamp the cutter ring 52 of the shield hob 5.

In this embodiment, the clamping mechanism 4 includes a clamping block 41 and an air cylinder 42 for driving the clamping block 41 to move telescopically to clamp the cutter ring 52, a contact surface between the clamping block 41 and the cutter ring 52 is an arc shape matched with the cutter ring 52, and the other surface of the clamping block 41 is fixedly connected with a piston rod of the air cylinder 42. Specifically, the air cylinder 42 is fixedly connected with the supporting frame 65 through a bolt, the clamping block 41 is fixed at the free end of the air cylinder 42 through a bolt, and the clamping block 41 is made of plastics. During operation, the air cylinder 42 drives the clamping block 41 to move in a telescopic mode so as to clamp or loosen the cutter ring 52, automatic clamping or loosening is achieved, a worker does not need to fix the shield hob 5, the automation degree is further improved, the production efficiency is high, the labor intensity of the worker is reduced, and the influence of the worker on a detection result can be eliminated. The contact surface of the clamping block 41 is set to be in a circular arc shape to match with the cutter ring 52 so as to ensure that the cutter ring 52 is firmly pressed, and the influence on the detection result caused by the rotation of the cutter ring during detection is avoided.

In this embodiment, there are two clamping mechanisms 4, the two clamping mechanisms 4 are symmetrically disposed on two sides of the tray assembly 1 and the shield hob 5, and there are two corresponding supporting frames 65, which are symmetrically disposed on two sides of the bracket 6 respectively, so as to mount and fix the clamping mechanisms 4. The symmetrically arranged clamping mechanisms 4 are matched with each other to firmly clamp the cutter ring 52, so that the cutter ring is prevented from rotating during detection to influence the detection result.

As shown in fig. 4, in this embodiment, a plurality of anti-slip grooves 411 are formed on the contact surface of the clamping block 41 and the cutter ring 52. Specifically, the plurality of anti-slip grooves 411 are arranged in parallel and at equal intervals. The anti-slip groove 411 is matched with an arc-shaped contact surface structure, so that the contact area between the clamping block 41 and the cutter ring 52 can be increased, friction is increased, and the cutter ring 52 is further ensured to be fixed firmly in a torque test.

The method for detecting the torque of the shield hobbing cutter by adopting the automatic detection device of the embodiment comprises the following steps,

s1, clamping the shield hob 5 to be detected through a worker or a robot, correctly placing the cutter shaft 51 in the groove of the detection tray 12, turning on a switch to enable the air cylinder 42 to start to act, enabling the clamping block 41 to extend out under the action of the air cylinder 42, enabling the inner side of the clamping block 41 to be in contact with the cutter ring 52, and pressing the cutter ring 52 from two sides, so that the shield hob 5 is fixed;

s2, starting a detection switch, driving a motor 21 to act, converting rotary power from a horizontal direction to a vertical direction through a spiral bevel gear speed reducing mechanism 22, then sequentially transmitting the power to a coupler 23, a transmission shaft 24, a torque measuring instrument 3, a tray base 11 and a detection tray 12, finally transmitting the power to a cutter shaft 51 of the shield hob 5 through the detection tray 12, and when the cutter shaft 51 starts to rotate, measuring and recording the torque at the moment by the torque measuring instrument 3 so as to measure and obtain the starting torque of the shield hob 5;

and S3, closing the detection switch to enable the driving motor 21 to stop power output, driving the clamping block 41 to retract back to the initial position by the adjusting cylinder 42, releasing the clamping state of the shield hob 5, taking the shield hob 5 out of the detection tray 12 by a worker or a robot, and finishing the whole detection process.

The automatic detection device and the detection method of the embodiment are adopted to detect the torque of the shield hob 5, the detection process can be automatically completed by means of a mechanical device without manual operation, the cutter shaft 51 is driven by the driving motor 21, the cutter ring 52 is clamped by the clamping block 41 in cooperation with the air cylinder 42, the torque is automatically measured by the torque measuring instrument 3, the automation degree of the whole detection process is high, the production efficiency is high, the labor intensity of workers is greatly reduced, the influence of human factors on the detection result is eliminated, the automatic detection device and the detection method are suitable for large-batch production processes, and the production cost can be effectively reduced.

Example 2:

this embodiment is substantially the same as embodiment 1, and mainly differs therefrom in that: in this embodiment, the supporting frame 65 is connected to the supporting frame 6 through a height adjusting mechanism. Specifically, the height adjusting mechanism is an electric screw rod mechanism, and the height of the clamping mechanism 4 can be adjusted up and down through the electric screw rod mechanism, so that the clamping block 41 can be matched with shield hobbing cutters 5 in various shapes, the applicability of the automatic detection device is improved, and the automatic detection device can be used for testing various types of shield hobbing cutters 5.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims

1. The utility model provides a shield constructs automatic checkout device of hobbing cutter moment of torsion which characterized in that: automatic checkout device is including being used for supporting arbor (51) of placing shield structure hobbing cutter (5) and driving tray subassembly (1) of arbor (51) rotation, be connected with on tray subassembly (1) and be used for the drive tray subassembly (1) rotatory actuating mechanism (2), be equipped with between actuating mechanism (2) and tray subassembly (1) and be used for measuring arbor (51) torque measurement appearance (3) of rotatory moment of torsion, the side of shield structure hobbing cutter (5) still is equipped with and is used for compressing tightly fixedly cutter ring (52) of shield structure hobbing cutter (5) are in order to prevent to stop cutter ring (52) rotatory clamping mechanism (4).

2. The automatic detection device according to claim 1, characterized in that: tray subassembly (1) includes tray base (11) and detection tray (12), tray base (11) are passed through torquemeter (3) with actuating mechanism (2) link to each other, it can dismantle fixed the setting on tray base (11) to detect tray (12), be equipped with on detecting tray (12) and be used for laying the recess of arbor (51), the shape phase-match of recess and arbor (51).

3. The automatic detection device according to claim 2, characterized in that: be equipped with location structure between tray base (11) and detection tray (12), location structure includes locating piece (13) and constant head tank (14) of mutually supporting, one in locating piece (13) and constant head tank (14) sets up on tray base (11), and another sets up on detecting tray (12).

4. The automatic detection device according to claim 3, characterized in that: the positioning block (13) is of a hexagonal prism-shaped boss structure, the positioning groove (14) is of a hexagonal prism-shaped groove structure matched with the hexagonal prism-shaped boss structure, the positioning block (13) is arranged on the detection tray (12), and the positioning groove (14) is arranged on the tray base (11).

5. The automatic detection device according to claim 1, characterized in that: actuating mechanism (2) include driving motor (21) and spiral bevel gear reduction gears (22), the one end of spiral bevel gear reduction gears (22) with driving motor (21) link to each other, and the other end of spiral bevel gear reduction gears (22) is connected with shaft coupling (23), still be connected with transmission shaft (24) on shaft coupling (23), transmission shaft (24) through a flange (25) with torque measurement appearance (3) link to each other.

6. The automatic detection device according to claim 5, characterized in that: automatic checkout device still includes support (6), support (6) include bottom plate (61) and two blocks of curb plates (62), actuating mechanism (2) fixed set up in on bottom plate (61), two blocks of curb plates (62) are fixed respectively and are set up in the both sides of bottom plate (61), fixed middle extension board (63) that are provided with between two blocks of curb plates (62), be equipped with the confession on middle extension board (63) the through-hole that transmission shaft (24) passed, install in the through-hole with transmission shaft (24) complex bearing (64).

7. The automatic detection device according to claim 6, characterized in that: the support (6) is provided with a support frame (65) for supporting the clamping mechanism (4), and the support frame (65) is connected with the support (6) through a height adjusting mechanism.

8. The automatic detection device according to any one of claims 1 to 7, characterized in that: the clamping mechanism (4) comprises a clamping block (41) and an air cylinder (42) used for driving the clamping block (41) to move telescopically so as to clamp the cutter ring (52), the contact surface of the clamping block (41) and the cutter ring (52) is in an arc shape matched with the cutter ring (52), and the other surface of the clamping block (41) is fixedly connected with a piston rod of the air cylinder (42).

9. The automatic detection device according to claim 8, characterized in that: and a plurality of anti-skidding grooves (411) are formed on the contact surface of the clamping block (41) and the cutter ring (52).

10. A method for detecting the torque of a shield hob by using the automatic detection device according to any one of claims 1 to 9, wherein: the method comprises the following steps:

s1, placing a cutter shaft (51) of the shield hobbing cutter (5) on the tray assembly (1), and then pressing a cutter ring (52) of the shield hobbing cutter (5) through a clamping mechanism (4), so that the shield hobbing cutter (5) is fixed;

s2, starting the driving mechanism (2) to transmit the rotating power to the cutter shaft (51) through the tray assembly (1), and when the cutter shaft (51) starts to rotate, measuring the starting torque of the shield hob (5) by the torque measuring instrument (3).