CN114074834A

CN114074834A - T-shaped shaft positioning mechanism and positioning method suitable for manufacturing industrial Internet of things

Info

Publication number: CN114074834A
Application number: CN202111376265.8A
Authority: CN
Inventors: 邵泽华; 周莙焱; 李勇; 程主彬; 叶建军
Original assignee: Chengdu Qinchuan IoT Technology Co Ltd
Current assignee: Chengdu Qinchuan IoT Technology Co Ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-02-22
Anticipated expiration: 2041-11-19
Also published as: CN114074834B

Abstract

The invention discloses a T-shaped shaft positioning mechanism and a positioning method suitable for manufacturing an industrial Internet of things, wherein the positioning mechanism comprises a material distributing device; the material distributing device comprises a first sliding block provided with an accommodating groove; the accommodating groove is arranged on the top side of the first sliding block; the width of holding tank satisfies: the T-shaped shaft can be supported on the top surface of the first sliding block in a mode that the shaft section is accommodated in the accommodating groove and two sides of the end cap are hooked on two sides of the accommodating groove; the holding tank is a through groove with two open ends. The positioning method is based on the positioning mechanism, and by adopting the positioning mechanism and the positioning method provided by the scheme, the T-shaped shaft with a specific posture and position can be obtained, so that the intelligent manufacturing of the electromechanical valve of the gas meter is facilitated.

Description

T-shaped shaft positioning mechanism and positioning method suitable for manufacturing industrial Internet of things

Technical Field

The invention relates to the technical field of assembly, in particular to a T-shaped shaft positioning mechanism and a positioning method suitable for manufacturing of an industrial Internet of things.

Background

In the existing intelligent gas meter, taking an IC card intelligent gas meter as an example, an electromechanical valve adopted therein has three structures:

the electromechanical valve rotates forward and backward through the motor, the gear drives the worm, and meanwhile, the push rod moves in the spiral groove of the worm, so that the opening and closing of the valve are realized. The electromechanical valve of this kind is characterized by no unloading device, and the locked rotor can be obtained after the forward rotation and the backward rotation are in place, and the load is also larger, thus causing large current of the control circuit and large power consumption. And the reliability of a control circuit of the main controller valve can be influenced, the service life of a battery in the controller is shortened, the energy storage capacitance value adopted for closing the valve is very large, and the valve is closed under positive pressure and is unreliable.

The electromechanical valve drives the sector gear to rotate by the forward and reverse rotation of the motor, so that the functions of anti-rotation blockage and quick closing are achieved. The gear speed changing box is characterized in that an anti-rotation-blocking mechanism consisting of a swinging plate and a swinging gear above the swinging plate is meshed with a sector gear, and the swinging gear fixed above the swinging plate is meshed with the sector gear to realize the anti-rotation-blocking function of the electromechanical valve by matching with the swinging of the swinging plate. The electromechanical valve of this kind is characterized in that the oscillating plate and the structure of the oscillating gear fixed above the oscillating plate and the sector gear which are meshed with each other cannot realize complete forward and reverse unloading.

The electromechanical valve rotates forwards and backwards through the motor, incomplete teeth rotate, and the functions of preventing rotation blockage and quickly closing are achieved. The further structural characteristics are that the ratchet double-connection gear is installed, and complete unloading can be realized in forward rotation and reverse rotation of the motor by matching with locking and unlocking of the incomplete gear and the locking block. The electromechanical valve is characterized in that because the valve core of the electromechanical valve is arranged in the shell, enough space must be reserved between the valve core and the shell, airflow can smoothly pass through the electromechanical valve, and the electromechanical valve cannot influence the meter clamping performance due to overlarge pressure loss, so that the integral volume of the electromechanical valve is large and the electromechanical valve cannot be arranged in an aluminum shell gas meter.

Based on the structure and characteristics of the electromechanical valve of the prior art, the applicant previously proposed a gas meter electromechanical valve solution as described in application No. CN 201220463732.0. In this scheme, an adopt the motor as the power supply, through the gearbox that includes multistage gear, then through incomplete gear etc. with the power of motor output as the technical scheme of drive seal ring cap linear motion power, adopt this scheme, can effectively solve electromechanical valve volume problem, lock rotor problem, reliability problem and response speed problem etc..

In further application or as an optimal mode, on the premise of meeting the requirements of size miniaturization and compact structure design, a T-shaped shaft can be used as a gear shaft of part or all gears in the multi-stage gear, the structural characteristics that the T-shaped shaft has a shaft section and a shaft cap are utilized, after the end face of the shaft cap is attached to the surface of an end plate of the gearbox, unidirectional positioning of the T-shaped shaft is achieved, the surface of an upper pore channel of the end plate can be utilized to restrain the shaft section as far as possible, and the matching area of the gear shaft and the end plate is increased to ensure the service life of the electromechanical valve. Different from the traditional gear shaft, the T-shaped shaft has the characteristic of relatively small size, so in the prior art, in consideration of implementation difficulty, the conventional method still adopts a manual assembly mode to complete the assembly of the electromechanical valve.

The process and the corresponding equipment capable of realizing intelligent manufacturing of the intelligent gas meter are provided to ensure the assembly quality and the assembly efficiency of the gas meter, and have important promotion significance undoubtedly on the development of the industry.

Disclosure of Invention

Aiming at the technical problems that the process and the corresponding equipment capable of realizing intelligent manufacturing of the intelligent gas meter are provided to ensure the assembling quality and the assembling efficiency of the gas meter and have important promotion significance to the development of the industry undoubtedly, the invention provides a T-shaped shaft positioning mechanism and a positioning method suitable for manufacturing of an industrial Internet of things. By adopting the positioning mechanism and the positioning method, the T-shaped shaft with a specific posture and a specific position can be obtained, the T-shaped shaft can be conveniently clamped in the later period, and the intelligent manufacturing of the electromechanical valve of the gas meter is favorably realized.

Aiming at the problems, the T-shaped shaft positioning mechanism suitable for manufacturing the industrial Internet of things provided by the invention solves the problems through the following technical key points: the T-shaped shaft positioning mechanism suitable for manufacturing the industrial Internet of things comprises a material distributing device;

the material distributing device comprises a first sliding block provided with an accommodating groove;

the accommodating groove is arranged on the top side of the first sliding block;

the width of holding tank satisfies: the T-shaped shaft can be supported on the top surface of the first sliding block in a mode that the shaft section is accommodated in the accommodating groove and two sides of the end cap are hooked on two sides of the accommodating groove;

the holding tank is a through groove with two open ends.

In the prior art, the industrial internet of things technology is continuously integrated into each link of industrial production with the advantages that the manufacturing efficiency can be effectively improved, the product quality is improved, the manufacturing cost and the resource consumption are reduced, and the key technology of the industrial internet of things comprises a sensor technology, an equipment technology, a network technology, an information processing technology, a safety technology and the like, wherein the sensor technology and the equipment technology can be regarded as the integral front end of the industrial internet of things, the information processing technology and the safety technology are generally regarded as the rear end of the industrial internet of things according to the scale of the industrial internet of things, and the front end is a perception control layer (perception control platform) comprising an equipment part and a sensor part. In order to realize the intelligentization of the assembly of the speed reducer, the specific assembly process design of the speed reducer taking the sensing control layer as a bearing body is one of key technologies. This scheme has the characteristics that the size is little, light in weight to thing networking gas table T type axle, provides one kind: the requirement for input at the front end of the T-shaped shaft can be weakened, and the subsequent feeding action of the T-shaped shaft in a single individual mode can be realized; the structure and the process design can be directly used for assembling the T-shaped shaft in the later period, and the technical scheme for intelligently manufacturing the electrovalve of the gas meter is favorably realized.

Specifically, the first sliding block is used in cooperation with a driving device, and the driving device is used for driving the first sliding block to reciprocate, preferably to linearly reciprocate. More specifically:

firstly, the accommodating tank is driven to move to a T-shaped shaft receiving station along with the first sliding block through the driving part, if a material source at the front end of the T-shaped shaft comes from a vibrating disc, the T-shaped shaft is obtained through a notch on one side of the accommodating tank, the T-shaped shaft can be supported on the top surface of the first sliding block through the end part of a shaft cap on the T-shaped shaft through limitation of the width of the accommodating tank, the T-shaped shaft can swing under the self weight through the constraint mode of the first sliding block on the T-shaped shaft, so that the primary constraint is carried out on the axial direction of the T-shaped shaft, and the T-shaped shaft can be continuously transmitted in a relatively stable posture in the axial direction through the constraint mode of the first sliding block on the T-shaped shaft;

then, through the driving part, the accommodating groove is driven to move to a T-shaped shaft axis restraining station along with the first sliding block, on the T-shaped shaft axis restraining station which moves to the accommodating groove and the material receiving station and is staggered, through the other side of the accommodating groove, namely the other side of the feeding side of the accommodating groove, the tip is directly acted on a shaft section of the T-shaped shaft to provide thrust for the side face of the T-shaped shaft, and the T-shaped shaft section opposite to the tip is supported on the rigid supporting face, so that a pair of opposite sides of the T-shaped shaft can be rigidly restrained, therefore, the T-shaped shaft is precisely positioned through the corresponding tip end face and the rigid supporting face, and the specific T-shaped shaft axis orientation can be obtained.

And after the T-shaped shaft with the specific axis is grabbed by the grabbing device, if the axis direction of the T-shaped shaft at the moment is set to be parallel to the axis of the corresponding shaft hole on the cover plate of the reduction gearbox, the T-shaped shaft can be assembled on the cover plate of the reduction gearbox in a linear motion mode along the axis.

Therefore, the positioning mechanism and the positioning method provided by the scheme can obtain the T-shaped shaft with a specific posture and position, and are favorable for realizing intelligent manufacturing of the electromechanical valve of the gas meter.

The further technical scheme of the T-shaped shaft positioning mechanism suitable for manufacturing the industrial Internet of things is as follows:

in order to utilize the gravity of the T-shaped shaft, so that the T-shaped shaft is supported by the first sliding block in a vertical posture as soon as possible initially, the subsequent clamping device can obtain the T-shaped shaft in a specific axial direction, the arrangement is as follows: the groove depth direction of the accommodating groove is located in the vertical direction. When the scheme is specifically applied, the following structural form is suitable to be adopted by the T-shaped shaft: the shaft cap end of the T-shaped shaft is provided with a plane vertical to the axis of the T-shaped shaft or the lower edge of the shaft cap end is vertical to the axis of the T-shaped shaft when the shaft cap is upward, so that the scheme that the surface of the first sliding block on the upper side of the accommodating groove, which is used for being in contact with the T-shaped shaft, is a horizontal plane is adopted; for the mode that the lower edge of the shaft cap end is a spherical surface, the scheme that the lower edge of the shaft cap end and the first sliding block form a spherical hinge is preferably arranged, and the top surface area of the first sliding block acting with the T-shaped shaft is a concave surface with the same shape as the spherical surface. Namely, as a person skilled in the art, the main idea of the present solution is to obtain a T-shaped shaft supported vertically as much as possible, and the corresponding design according to the specific shape of the T-shaped shaft cap end when designing the first slider top surface form is the same alternative as the above concept.

More perfect, as holding tank more than one kind utilizes, realize carrying out the concrete scheme of accurate location to T type axle, set up to: the material distributing device also comprises a driving part, and the driving part is used for driving the first sliding block to reciprocate; the feed divider still includes the second slider of one end orientation holding tank motion trail, the one end of second slider orientation holding tank motion trail still is provided with top, top can be by the side embedding of holding tank in the holding tank. When the scheme is used specifically, the first sliding block stops sliding after sliding to the top movement track, the top is embedded into the accommodating groove, the end part of the top can be used for providing constraint for the side surface of the T-shaped shaft section, and the purposes of further constraining the direction of the axis of the T-shaped shaft and providing deflection constraint for deflection of the T-shaped shaft are achieved. The second slider of this scheme adoption is preferred to be adopted dull and stereotyped structure, adopts the second slider formula of keeping flat when specifically using to provide if the baffle formation bottom surface based on following disclosure supports through the bottom for the second slider, so that the second slider has stable movement track in order to do benefit to top and the cooperation precision of holding tank. Therefore, one side of the accommodating groove is used for leading the T-shaped shaft into the transmission groove, the other side of the accommodating groove is used for leading the tip into the transmission groove, and the motion track of the first sliding block is attached to the side face of the material conveying platform. In this scheme, the driver part can adopt and drive actuating cylinder, considers the stop position required precision of first slider, further sets up to: and a limiting device is arranged on a moving path of the first sliding block and/or a piston rod of the driving cylinder, so that when the first sliding block moves to the top matching station, the accurate positioning of the stop position of the first sliding block can be realized under the action of the limiting device. The specific implementation form of the limiting device can adopt a stroke adjusting block which is a limiting screw, so that the position of the first sliding block at a required position is restrained by the stroke adjusting block in direct contact with the first sliding block and/or a piston rod part of the driving cylinder.

As a further implementation form of the distributing device, the distributing device is provided with: the material distributing device also comprises a baffle;

the second sliding block is slidably supported on the baffle;

the material distributing device also comprises a spring for providing sliding driving force for the second sliding block;

the front end of the first sliding block and the side surface of the tip are provided with guide surfaces;

the guide surface is used for realizing that: when the guide surface of the first slide block and the guide surface of the tip are mutually extruded, the first slide block provides a compression spring for the second slide block, so that the second slide block returns relative to the first slide block. The scheme aims to provide a scheme of the material distribution device, wherein an additional power device is not needed when the second sliding block moves. When the second sliding block is used specifically, the spring is used for accumulating force when the second sliding block retracts, and the spring is installed as follows: the tip can be embedded into the receiving groove under the action of the spring. Therefore, when the first sliding block moves forward towards the movement track of the tip, the front end of the first sliding block is matched with the guide surface on the side surface of the tip, the first sliding block extrudes the tip to enable the second sliding block to retreat, and when the first sliding block continues to move, the tip is embedded into the accommodating groove under the spring force. When the first sliding block needs to further advance or retreat relative to the tip, the second sliding block can be driven to retreat in the further movement process of the first sliding block by setting the end position surface of the side surface of the accommodating groove as the guide surface. Preferably, adopt in this scheme to set up the position of pore restraint second slider on first slider motion direction on the baffle, the spring adopts: and the axis of the spring is perpendicular to the movement direction of the first sliding block. Therefore, the accuracy of the movement track of the tip in the long-term use process of the positioning mechanism can be improved by optimizing the side surface abrasion of the second sliding block.

As a more complete, can be for feed divider input T type axle, usable material conveying platform, baffle provide the dropproof restraint for T type axle simultaneously, can utilize material conveying platform cooperation top realizes the final axis direction rigidity constraint's of T type axle technical scheme, sets up to: the material conveying platform is provided with a conveying groove;

the conveying groove is a groove body which is arranged on the top surface of the material conveying platform and the end part of which is connected with the side surface of the material conveying platform;

the width of the transmission groove satisfies: the T-shaped shaft can be supported on the top surface of the material conveying platform in a mode that the shaft section is accommodated in the conveying groove and the two sides of the end cap are hooked on the two sides of the conveying groove;

during the reciprocating motion of the first sliding block, the accommodating groove can be butted with the end part of the transmission groove so as to receive the T-shaped shaft from the transmission groove;

the accommodating groove is constrained in a sliding groove formed by the baffle and the material conveying platform along with the motion track of the first sliding block;

the material conveying platform and the second sliding block are positioned on different sides of the first sliding block;

in the moving direction of the first sliding block, the positions of the outlet of the transmission groove and the tip are staggered.

In the scheme, firstly, the shape, the position and the size of the transmission groove are limited, so that a technical scheme that the posture of the transmission groove can be relatively stable when the vibration disc is matched at the front end and the T-shaped shaft is transmitted in the transmission groove and the self-adjustment of the posture of the T-shaped shaft can be realized by utilizing the self weight of the T-shaped shaft is provided; secondly, in the transmission groove, the T-shaped shafts can be continuously output in the transmission groove by utilizing a mode that shaft caps between adjacent T-shaped shafts are mutually pushed; secondly, first slider cooperation material transfer platform is injectd simultaneously and is: the containing groove is constrained in a sliding groove formed by the baffle and the material conveying platform along with the motion trail of the first sliding block, so that when the containing groove and the transmission groove are staggered, the side surface of the first sliding block can be used for providing T-shaped shaft anti-falling protection for the transmission groove; secondly, it is defined as: in the moving direction of the first sliding block, the positions of the outlet of the transmission groove and the center are staggered, namely the first sliding block is utilized to restrain the T-shaped shaft to further move from the output end of the transmission groove, the side face of the material conveying platform can be utilized to match the center, and the final positioning in the axis direction of the T-shaped shaft is realized.

For promoting first slider transfer and realize T type axle axial positioning's efficiency, set up to: be provided with a plurality of holding tanks on the first slider, the holding tank is arranged along first slider length direction interval. When the scheme is used specifically, a plurality of first sliding block stop states are obtained on a first sliding block moving track under the action of the driving part, each stop state corresponds to the transmission groove respectively to realize T-shaped shaft receiving and T-shaped shaft axis positioning corresponding to the tip, and the transfer and axis positioning of a plurality of T-shaped shafts can be completed in one action period of the driving part. In specific applications, the following are preferably adopted: the first sliding block moves in a linear reciprocating motion mode in the horizontal direction, so that the positions of the driving part, the material conveying platform and the baffle are fixed in space, and the positions of the accommodating grooves can be matched with the position of the outlet of the transmission groove and the final position of the tip moving towards the first sliding block conveniently in the position changing process. If when the driving cylinder with the axis in the horizontal direction is used as a driving part, the extending length of the piston rod of the driving cylinder is controlled to be defined to be that each accommodating groove is positioned on a station meeting the process requirement.

A gap is arranged between the baffle and the first sliding block and/or between the material conveying platform and the first sliding block, and the width of the gap is smaller than the diameter of the T-shaped shaft end cap;

when the tip is embedded into the accommodating groove, the tip can provide the following constraint state for the shaft section of the T-shaped shaft: on a pair of opposite sides of the shaft section, one side of which is in contact with the side surface of the material transfer platform and the other side of which is in contact with the end surface of the tip. The structural design of the scheme includes that firstly, a motion gap is provided for the first sliding block by utilizing the side surface of the material conveying platform and the side surface of the baffle plate, and the constraint failure of the accommodating groove on the T-shaped shaft is avoided by the fact that the motion trail of the accommodating groove is located in the sliding groove; and secondly, after the T-shaped shaft enters the accommodating groove from the transmission groove by limiting the gap between the baffle and the first sliding block and/or between the material conveying platform and the first sliding block, aiming at the condition that the T-shaped shaft is inclined forwards and backwards along the length direction of the transmission groove and the shaft caps are overlapped, the gap width is matched with the width of the accommodating groove, so that a single T-shaped shaft can enter the accommodating groove more smoothly, and even if the gap width between the material conveying platform and the baffle is more than or equal to twice of the diameter of the shaft caps of the T-shaped shaft, only one T-shaped shaft can be allowed to enter the accommodating groove at a time by controlling the movement speed of the first sliding block. Preferably, considering that the T-shaped shaft swings perpendicular to the extending direction of the transmission slot due to mutual extrusion and vibration during the transmission process of the T-shaped shaft, so as to cause the shaft section of the T-shaped shaft to be embedded into the gap, the gap width may be further set as: the width of the gap is smaller than the diameter of the shaft section of the T-shaped shaft.

As one kind can rely on other parts on this mechanism as the structure basis, realize with low costs, under the reliable circumstances of testing result, accomplish to the T type axle successfully get into the holding tank, the holding tank successfully shifts the technical scheme of T type axle to top restraint station, set up to: the second sliding block and the first sliding block are both conductors, and the baffle is an insulator;

the electrode is arranged on the baffle and is opposite to the material outlet end of the conveying groove;

after the accommodating groove receives the T-shaped shaft from the transmission groove, the T-shaped shaft supported on the first sliding block is contacted with the electrode;

when the accommodating groove moves to the movement track of the tip and the spring is in a free state, the tip and the first sliding block are mutually in an interval state. The technical scheme is provided in the scheme, and whether the detection circuit is electrically conducted or not is taken as a detection judgment condition. Specifically, on the basis that the T-shaped shaft is generally made of a metal conductive material, the T-shaped shaft is matched with an electrode to form accommodating groove feeding detection, and the T-shaped shaft is matched with a second sliding block to form axis constraint station feeding detection. More specifically, if the first sliding block is communicated with the electrode through the T-shaped shaft, the feeding detection of the accommodating groove is realized; the first sliding block is communicated with the second sliding block through the T-shaped shaft to realize axis constraint station feeding detection. When the holding tank that proposes above moves to apical movement track, and the spring is in free state, top and first slider are looks interval state each other, promptly: if the T-shaped shaft is reliably received in the accommodating groove, when the T-shaped shaft moves to the tip constraint station along with the first sliding block, the second sliding block is electrically communicated with the first sliding block through the T-shaped shaft, and at the moment, the T-shaped shaft carried by the accommodating groove can be judged to be effective; when the holding tank was vacant, when the holding tank moved to top restraint station, spring full recovery deformation along with first slider, first slider was the looks spaced state with the second slider this moment, like this, first slider and second slider can not the electric conduction, can judge to carry T type axle failure for the holding tank this moment.

Correspondingly, according to a specific judgment structure, the control of the residence time or the starting control of a driving part when the first sliding block receives the material, the starting control of the first sliding block for resetting the material receiving, the fault output or the working state feedback control and the like can be involved, and the control is closed-loop control comprising a judgment result, so that the detection circuit can be used as a sensing control platform of a control system to obtain whether an electric conduction result exists or not in specific implementation; a sensing network platform is adopted to realize sensing result signal transmission and specific control signal transmission aiming at local or remote transmission; and a management platform is adopted to realize that a specific control signal is output by taking the sensing result signal as a judgment basis and combining judgment logic or setting.

In order to realize that after the axis of the T-shaped shaft is limited, if the clamping device is adopted to further transfer the T-shaped shaft subsequently, the size requirement on the end cap of the T-shaped shaft during clamping is reduced or the T-shaped shaft is prevented from being damaged during clamping, the method is characterized in that: the accommodating groove is a through groove extending up and down;

still including setting up in first slider below for by the bottom side to carrying out the jacking device that jacks up to T type axle in the holding tank. This scheme is when concrete application, and the holding tank moves to the clamp of getting the device and gets behind the station on first slider, carries out the jacking to T type axle through the bottom side of jacking device by the holding tank for the back is moved on the shaft cap of T type axle, can get T type axle with reliable clamp more smoothly. As a person skilled in the art, regarding the structural design of the first slider, it is sufficient that the first slider includes a substrate and extension portions which are both integrated with the substrate, and the receiving groove is formed between the extension portions.

The scheme also discloses a T-shaped shaft positioning method suitable for manufacturing the industrial Internet of things, which is based on any one of the positioning mechanisms;

the positioning method comprises the following operation steps:

s1, driving the accommodating groove to move to a T-shaped shaft receiving station along with the first sliding block through the driving part, obtaining a T-shaped shaft through a notch on one side of the accommodating groove, and supporting the T-shaped shaft on the top surface of the first sliding block through the end part of a shaft cap on the T-shaped shaft;

and S2, the accommodating groove is driven to move to a T-shaped shaft axis constraint station along with the first sliding block through the driving part, the tip is directly acted on a shaft section of the T-shaped shaft through the other side of the accommodating groove on the T-shaped shaft axis constraint station to provide thrust for the side face of the T-shaped shaft, and the shaft section of the T-shaped shaft opposite to the tip is supported on the rigid supporting face.

The method is the using method of the positioning mechanism, and by adopting the method, the T-shaped shafts can be subjected to individual material distribution under the condition that the sources of the T-shaped shafts are simple, and meanwhile, in the material distribution and transmission process, the axis position limitation of the T-shaped shafts with relatively small sizes is realized by utilizing a simple structure and a simple method, so that the subsequent acquisition, transfer and assembly of the T-shaped shafts are completed by adopting a transfer and installation mechanism with a specific motion form during the subsequent transfer and assembly of the T-shaped shafts. Finally, intelligent manufacturing of the electromechanical valve of the gas meter is realized or a structure and a method foundation are provided for the intelligent manufacturing.

The invention has the following beneficial effects:

this scheme has the characteristics that the size is little, light in weight to thing networking gas table T type axle, provides one kind: the requirement for input at the front end of the T-shaped shaft can be weakened, and the subsequent feeding action of the T-shaped shaft in a single individual mode can be realized; the structure and the process design can be directly used for assembling the T-shaped shaft in the later period, and the technical scheme for intelligently manufacturing the electrovalve of the gas meter is favorably realized.

Drawings

Fig. 1 is a schematic structural view of a specific embodiment of a T-shaped shaft positioning mechanism suitable for manufacturing an industrial internet of things according to the present scheme, and the schematic structural view is a perspective view of an overall structure;

fig. 2 is a schematic structural view of a specific embodiment of a T-shaped shaft positioning mechanism suitable for manufacturing an industrial internet of things according to the present scheme, and the schematic structural view is a rear view;

fig. 3 is a schematic structural view of a specific embodiment of a T-shaped shaft positioning mechanism suitable for manufacturing an industrial internet of things according to the present invention, and the schematic structural view is a schematic top view of the positioning mechanism;

fig. 4 is a partially enlarged view of a portion a shown in fig. 3.

The reference numbers in the drawings are respectively: 1. the material conveying device comprises a material conveying platform, 11, a conveying groove, 2, a material distributing device, 21, a driving part, 22, a sliding groove, 23, a baffle plate, 24, a first sliding block, 25, an accommodating groove, 26, a second sliding block, 27, a tip, 28, a spring, 29, an electrode, 3 and a jacking device.

Detailed Description

The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples:

example 1:

as shown in fig. 1 to 4, the T-shaped shaft positioning mechanism suitable for manufacturing of the industrial internet of things includes a material distributing device 2;

the material distributing device 2 comprises a first sliding block 24 provided with a containing groove 25;

the receiving groove 25 is provided at the top side of the first slider 24;

the width of the accommodating groove 25 satisfies: the T-shaped shaft can be supported on the top surface of the first sliding block 24 in a mode that the shaft section is accommodated in the accommodating groove 25 and two sides of the end cap are hooked on two sides of the accommodating groove 25;

the holding groove 25 is a through groove with two open ends.

Specifically, the above first slider 24 is used in cooperation with a driving device for driving the first slider 24 to reciprocate, preferably linearly reciprocate. More specifically:

firstly, the driving part 21 drives the accommodating groove 25 to move to a T-shaped shaft receiving station along with the first slide block 24, if a material source at the front end of the T-shaped shaft comes from a vibrating disk, the T-shaped shaft is obtained through a notch at one side of the accommodating groove 25, the T-shaped shaft can be supported on the top surface of the first slide block 24 through the end part of a shaft cap on the T-shaped shaft by limiting the width of the accommodating groove 25, the T-shaped shaft can swing under the self-weight in the constraint mode of the first slide block 24 to the T-shaped shaft so as to carry out primary constraint on the axial direction of the T-shaped shaft, and the T-shaped shaft can be continuously transmitted in a relatively stable posture in the axial direction in the constraint mode of the T-shaped shaft;

then, through the driving part 21, the accommodating groove 25 is driven to move to a T-shaped shaft axis restraining station along with the first slider 24, and on the T-shaped shaft axis restraining station which moves to the accommodating groove 25 and is staggered with the receiving station, through the other side of the accommodating groove 25, namely the other side of the feeding side of the accommodating groove 25, the tip 27 is directly acted on the shaft section of the T-shaped shaft to provide thrust for the side surface of the T-shaped shaft, and the T-shaped shaft section on the opposite side of the tip 27 is supported on the rigid supporting surface, so that a pair of opposite sides of the T-shaped shaft can be rigidly restrained, and thus, the T-shaped shaft is precisely positioned through the corresponding tip 27 end surface and the rigid supporting surface, and a specific T-shaped shaft axis orientation can be obtained.

Example 2:

this example was further optimized and refined on the basis of example 1:

in order to utilize the gravity of the T-shaped shaft so that the T-shaped shaft is supported by the first slider 24 in a vertical posture as initially as possible, the subsequent gripping device can obtain the T-shaped shaft in a specific axial direction by: the depth direction of the accommodating groove 25 is in the vertical direction. When the scheme is specifically applied, the following structural form is suitable to be adopted by the T-shaped shaft: the shaft cap end of the T-shaped shaft is provided with a plane vertical to the axis of the T-shaped shaft or the lower edge of the shaft cap end is vertical to the axis of the T-shaped shaft when the shaft cap is upward, so that the scheme that the surface of the first sliding block 24 on the upper side of the accommodating groove 25, which is used for being in contact with the T-shaped shaft, is a horizontal plane is adopted; for the mode that the lower edge of the shaft cap end is a spherical surface, the scheme that the lower edge of the shaft cap end and the first sliding block 24 form a spherical hinge is preferably set, and the top surface area of the first sliding block 24 acting with the T-shaped shaft is a concave surface consistent with the shape of the spherical surface. That is, as a person skilled in the art, the gist of the present solution is to obtain a T-shaped shaft supported vertically as much as possible, and the corresponding design according to the specific shape of the T-shaped shaft cap end when designing the top surface form of the first slider 24 is the same alternative as the above concept.

Example 3:

this example was further optimized and refined on the basis of example 1:

more perfect, as holding tank 25 more than one kind utilization, realize carrying out the concrete scheme of accurate location to T type axle, set up to: the material distributing device 2 further comprises a driving part 21, and the driving part 21 is used for driving a first slide block 24 to reciprocate; the feed divider 2 further comprises a second sliding block 26 with one end facing the motion track of the accommodating groove 25, an apex 27 is further arranged at one end of the second sliding block 26 facing the motion track of the accommodating groove 25, and the apex 27 can be embedded into the accommodating groove 25 from the side surface of the accommodating groove 25. When the scheme is used specifically, the sliding is stopped after the first sliding block 24 slides to the movement track of the tip 27, the tip 27 is embedded into the accommodating groove 25, and the end part of the tip 27 can be used for providing constraint for the side surface of the shaft section of the T-shaped shaft, so that the purposes of further constraining the axial direction of the T-shaped shaft and providing deflection constraint for the deflection of the T-shaped shaft are achieved. The second slider 26 that this scheme adopted preferably adopts the flat plate structure, adopts second slider 26 formula of keeping flat when specifically using to form the bottom surface support through providing for the bottom of second slider 26 like the baffle 23 based on following disclosure, so that second slider 26 has stable motion track and so as to do benefit to top 27 and the cooperation precision of holding tank 25. In this way, one side of the accommodating groove 25 is used for guiding the T-shaped shaft from the transmission groove 11, the other side of the accommodating groove is used for guiding the tip 27, and the motion track of the first sliding block 24 is attached to the side surface of the material conveying platform 1. In this embodiment, the driving component 21 may adopt a driving cylinder, and considering the requirement of the stop position precision of the first slider 24, the arrangement is further as follows: and a limiting device is arranged on the moving path of the first sliding block 24 and/or the piston rod of the driving air cylinder, so that when the first sliding block 24 moves to the matching station of the tip 27, the stopping position fine positioning of the first sliding block 24 can be realized under the action of the limiting device. The specific implementation form of the limiting device can adopt a stroke adjusting block which is a limiting screw, so that the position of the first sliding block 24 at a required position is restrained by the stroke adjusting block directly contacting with the first sliding block 24 and/or a piston rod part of the driving cylinder.

As a further implementation form of the distributing device 2, the following are provided: the material distributing device 2 further comprises a baffle plate 23;

the second slide block 26 is slidably supported on the baffle plate 23;

the feed divider 2 further comprises a spring 28 for providing a sliding driving force to the second slider 26;

the front end of the first sliding block 24 and the side surface of the tip 27 are provided with guide surfaces;

the guide surface is used for realizing that: when the guide surface of the first slider 24 and the guide surface of the tip 27 are pressed against each other, the first slider 24 provides the second slider 26 with a force that compresses the spring 28, causing the second slider 26 to retreat relative to the first slider 24. The scheme aims to provide a scheme of the material separating device 2, wherein no additional power device is needed for moving the second sliding block 26. In particular use, the spring 28 is used for accumulating force when the second slider 26 is retracted, and is mounted as follows: the tip 27 can be inserted into the receiving groove 25 under the force of the spring 28. Thus, when the first slider 24 moves forward toward the movement track of the tip 27, the front end of the first slider 24 engages with the guide surface on the side surface of the tip 27, the first slider 24 presses the tip 27 to retract the second slider 26, and when the first slider 24 continues to move the tip 27 into the receiving groove 25 in a facing relationship, the tip 27 is inserted into the receiving groove 25 under the force of the spring 28. When the first slider 24 needs to be further advanced or retracted relative to the tip 27, the second slider 26 can be driven to retract during the further movement of the first slider 24 by setting the side end position surface of the receiving groove 25 as a guide surface. Preferably, in this embodiment, the baffle 23 is provided with a duct to restrict the position of the second slider 26 in the moving direction of the first slider 24, and the spring 28 adopts: and a spring 28 of a spiral type having an axis perpendicular to the moving direction of the first slider 24. Thus, the accuracy of the movement locus of the tip 27 during the long-term use of the positioning mechanism can be improved by optimizing the side surface wear of the second slide block 26.

As a more complete, can be for feed divider 2 input T type axle, usable material conveying platform 1, baffle 23 provide the dropproof restraint for T type axle simultaneously, can utilize material conveying platform 1 cooperation top 27, realize the final axis direction rigidity constraint's of T type axle technical scheme, set up to: the material conveying platform comprises a material conveying platform 1 provided with a conveying groove 11;

the conveying groove 11 is a groove body which is arranged on the top surface of the material conveying platform 1 and the end part of which is connected with the side surface of the material conveying platform 1;

the width of the transmission groove 11 satisfies: the T-shaped shaft can be supported on the top surface of the material conveying platform 1 in a mode that the shaft section is accommodated in the transmission groove 11 and two sides of the end cap are hooked on two sides of the transmission groove 11;

during the reciprocating motion of the first slider 24, the receiving groove 25 can be butted with the end of the transmission groove 11 to receive the T-shaped shaft from the transmission groove 11;

the accommodating groove 25 is constrained in a chute 22 formed by the baffle 23 and the material conveying platform 1 along with the motion track of the first slider 24;

the material conveying platform 1 and the second slide block 26 are positioned on different sides of the first slide block 24;

in the direction of movement of the first slide 24, the outlet of the transfer slot 11 and the apex 27 are offset with respect to one another.

In the scheme, firstly, the shape, the position and the size of the transmission groove 11 are limited, so that a technical scheme that the front end of the transmission groove can be matched with a vibration disc, the posture of the T-shaped shaft is relatively stable when the T-shaped shaft is transmitted in the transmission groove 11, and the self-adjustment of the posture of the T-shaped shaft can be realized by utilizing the self weight of the T-shaped shaft is provided; secondly, in the transmission groove 11, the T-shaped shafts can be continuously output in the transmission groove 11 by utilizing a mutual pushing mode of shaft caps between the adjacent T-shaped shafts; secondly, the first slider 24 cooperates with the material transfer platform 1, while defining: the accommodating groove 25 is constrained in the chute 22 formed by the baffle 23 and the material conveying platform 1 along with the motion track of the first slider 24, so that after the positions of the accommodating groove 25 and the transmission groove 11 are staggered, the side surface of the first slider 24 can be used for providing T-shaped shaft anti-falling protection for the transmission groove 11; secondly, it is defined as: in the moving direction of the first sliding block 24, the positions of the outlet of the transmission groove 11 and the center 27 are staggered, namely, after the first sliding block 24 is used for restraining the T-shaped shaft to further move from the output end of the transmission groove 11, the side surface of the material conveying platform 1 can be used for being matched with the center 27, and the final positioning in the axis direction of the T-shaped shaft is realized.

Example 4:

this example was further optimized and refined on the basis of example 1:

in order to improve the efficiency of transferring the first sliding block 24 and realizing the axial positioning of the T-shaped shaft, the method comprises the following steps: a plurality of accommodating grooves 25 are formed in the first slider 24, and the accommodating grooves 25 are arranged at intervals along the length direction of the first slider 24. When the scheme is used specifically, a plurality of stop states of the first sliding block 24 are obtained on the moving track of the first sliding block 24 under the action of the driving part 21, each stop state corresponds to the transmission groove 11 to realize T-shaped shaft receiving and corresponds to the tip 27 to realize T-shaped shaft axis positioning, and therefore the transfer and axis positioning of a plurality of T-shaped shafts can be completed in one action period of the driving part 21. In specific applications, the following are preferably adopted: the first sliding block 24 moves in a linear reciprocating manner in the horizontal direction, so that the outlet position of the conveying chute 11 and the final position of the tip 27 moving towards the first sliding block 24 can be matched very conveniently in the position changing process of each accommodating groove 25 under the condition that the driving part 21, the material conveying platform 1 and the baffle plate 23 are fixed in position in space. If a driving cylinder with its axis in the horizontal direction is used as the driving member 21, the extension length of the piston rod of the driving cylinder can be controlled to be defined as each accommodating groove 25 located at a station satisfying the process requirement.

Example 5:

this example was further optimized and refined on the basis of example 3:

a gap is arranged between the baffle plate 23 and the first sliding block 24 and/or between the material conveying platform 1 and the first sliding block 24, and the width of the gap is smaller than the diameter of the T-shaped shaft end cap;

when the tip 27 is inserted into the receiving groove 25, the tip 27 can provide the following constraint condition for the shaft section of the T-shaped shaft: on a pair of opposite sides of the shaft section, one side of which is in contact with the side face of the material transfer platform 1 and the other side of which is in contact with the end face of the tip 27. The structural design of the scheme is that firstly, a motion gap is provided for the first sliding block 24 by utilizing the side surface of the material conveying platform 1 and the side surface of the baffle 23, and the constraint failure of the accommodating groove 25 to the T-shaped shaft is avoided by positioning the motion trail of the accommodating groove 25 in the sliding groove 22; secondly, by limiting the gap between the baffle plate 23 and the first slide block 24 and/or between the material conveying platform 1 and the first slide block 24, and by limiting the width of the gap, after the T-shaped shaft enters the accommodating groove 25 from the conveying groove 11, aiming at the condition that the T-shaped shaft is inclined forwards and backwards along the length direction of the conveying groove 11 and the shaft caps are overlapped, the width of the gap is matched with the width of the accommodating groove 25, so that a single T-shaped shaft can enter the accommodating groove 25 more smoothly, and even if the width of the gap between the material conveying platform 1 and the baffle plate 23 is larger than or equal to twice of the diameter of the shaft caps of the T-shaped shaft, the movement speed of the first slide block 24 can be controlled to allow only one T-shaped shaft to enter the accommodating groove 25 at a time.

Example 6:

this example was further optimized and refined on the basis of example 1:

as a can rely on other parts on this mechanism as the structure basis, realize with low costs, under the reliable circumstances of testing result, accomplish to the T type axle successfully get into holding tank 25, the technical scheme that holding tank 25 successfully shifted T type axle to top 27 restraint station, set up to: the second sliding block 26 and the first sliding block 24 are both conductors, and the baffle 23 is an insulator;

the device also comprises an electrode 29 arranged on the baffle plate 23, wherein the electrode 29 is opposite to the material outlet end of the conveying groove 11;

after the receiving groove 25 receives the T-shaped shaft from the transmission groove 11, the T-shaped shaft supported on the first slider 24 is in contact with the electrode 29;

when the receiving groove 25 moves to the movement track of the tip 27 and the spring 28 is in the free state, the tip 27 and the first slider 24 are in a spaced state. The technical scheme is provided in the scheme, and whether the detection circuit is electrically conducted or not is taken as a detection judgment condition. Specifically, based on the T-shaped shaft itself being generally made of a metal conductive material, the T-shaped shaft is used to cooperate with the electrode 29 to form the receiving groove 25 for feeding detection, and the T-shaped shaft is used to cooperate with the second slider 26 to form the axis constraint station feeding detection. More specifically, if the first slider 24 is conducted with the electrode 29 through the T-shaped shaft, the feeding detection of the accommodating groove 25 is realized; the first slide block 24 is communicated with the second slide block 26 through a T-shaped shaft to realize the axial line constraint station feeding detection. When the receiving groove 25 moves to the movement track of the tip 27 and the spring 28 is in the free state, as mentioned above, the tip 27 and the first slider 24 are in a spaced state from each other, that is: if the T-shaped shaft is reliably received in the accommodating groove 25, when the T-shaped shaft moves to the tip 27 constraint station along with the first slider 24, the second slider 26 and the first slider 24 are electrically conducted through the T-shaped shaft, and at this time, it can be determined that the accommodating groove 25 carries the T-shaped shaft effectively; when the accommodating groove 25 is empty, when the accommodating groove 25 moves to the tip 27 constraint station along with the first slider 24 and the spring 28 completely recovers to deform, the first slider 24 and the second slider 26 are in a spaced state, so that the first slider 24 and the second slider 26 cannot be electrically conducted, and at this time, it can be determined that the accommodating groove 25 carrying the T-shaped shaft fails.

Correspondingly, according to a specific judgment structure, for example, the control of the retention time or the start control of the driving part 21 when the first sliding block 24 receives the material, the start control of the first sliding block 24 for resetting the material receiving, the fault output or the working state feedback control, and the like, which are closed-loop controls including judgment results, can be involved, so that in specific implementation, the detection circuit can be used as a sensing control platform of a control system to obtain whether an electric conduction result exists; a sensing network platform is adopted to realize sensing result signal transmission and specific control signal transmission aiming at local or remote transmission; and a management platform is adopted to realize that a specific control signal is output by taking the sensing result signal as a judgment basis and combining judgment logic or setting.

In order to realize that after the axis of the T-shaped shaft is limited, if the clamping device is adopted to further transfer the T-shaped shaft subsequently, the size requirement on the end cap of the T-shaped shaft during clamping is reduced or the T-shaped shaft is prevented from being damaged during clamping, the method is characterized in that: the accommodating groove 25 is a through groove extending up and down;

the lifting device 3 is arranged below the first sliding block 24 and used for lifting the T-shaped shaft in the accommodating groove 25 from the bottom side. This scheme is when concrete application, and after holding tank 25 moved to the clamp of getting the device and get the station on first slider 24, carries out the jacking to T type axle through jacking device 3 by the bottom side of holding tank 25 for the back is moved on the shaft cap of T type axle, can get T type axle with reliable clamp more smoothly. As a person skilled in the art, regarding the structural design of the first slider 24, it is sufficient that the first slider 24 includes a substrate and extension portions which are both integrated with the substrate, and the receiving groove 25 is formed between the extension portions.

Example 7:

on the basis of any one of the above embodiments, the present embodiment provides a T-shaped shaft positioning method suitable for manufacturing an industrial internet of things, where the method is based on the positioning mechanism as described in any one of the above embodiments;

the positioning method comprises the following operation steps:

s1, driving the accommodating groove 25 to move to a T-shaped shaft receiving station along with the first sliding block 24 through the driving part 21, obtaining a T-shaped shaft through a notch on one side of the accommodating groove 25, and supporting the T-shaped shaft on the top surface of the first sliding block 24 through the end part of a shaft cap on the T-shaped shaft;

and S2, driving the accommodating groove 25 to move to a T-shaped shaft axis restraining station along with the first sliding block 24 through the driving part 21, and directly acting the shaft section of the T-shaped shaft on the other side of the accommodating groove 25 through the tip 27 to provide thrust for the side surface of the T-shaped shaft in the T-shaped shaft axis restraining station, wherein the shaft section of the T-shaped shaft on the opposite side of the tip 27 is supported on a rigid supporting surface.

The foregoing is a more detailed description of the present invention in connection with specific preferred embodiments thereof, and it is not intended that the specific embodiments of the present invention be limited to these descriptions. For those skilled in the art to which the invention pertains, other embodiments that do not depart from the gist of the invention are intended to be within the scope of the invention.

Claims

1. The T-shaped shaft positioning mechanism suitable for manufacturing the industrial Internet of things is characterized by comprising a material distributing device (2);

the material distributing device (2) comprises a first sliding block (24) provided with an accommodating groove (25);

the accommodating groove (25) is arranged on the top side of the first sliding block (24);

the width of the accommodating groove (25) satisfies: the T-shaped shaft can be supported on the top surface of the first sliding block (24) in a mode that the shaft section is accommodated in the accommodating groove (25) and the two sides of the end cap are hooked on the two sides of the accommodating groove (25);

the accommodating groove (25) is a through groove with two open ends.

2. The T-shaped shaft positioning mechanism suitable for manufacturing of industrial Internet of things as claimed in claim 1, wherein the depth direction of the accommodating groove (25) is in a vertical direction.

3. The T-shaped shaft positioning mechanism suitable for manufacturing the industrial Internet of things as claimed in claim 1, wherein the material separating device (2) further comprises a driving part (21), and the driving part (21) is used for driving a first sliding block (24) to reciprocate;

the material distributing device (2) further comprises a second sliding block (26) with one end facing the motion track of the accommodating groove (25), an apex (27) is further arranged at one end of the second sliding block (26) facing the motion track of the accommodating groove (25), and the apex (27) can be embedded into the accommodating groove (25) from the side face of the accommodating groove (25).

4. The T-shaped shaft positioning mechanism suitable for manufacturing of the industrial Internet of things as claimed in claim 3, wherein the material separating device (2) further comprises a baffle plate (23);

the second sliding block (26) is slidably supported on the baffle plate (23);

the material distributing device (2) further comprises a spring (28) for providing sliding driving force for the second sliding block (26);

the front end of the first sliding block (24) and the side surface of the tip (27) are provided with guide surfaces;

the guide surface is used for realizing that: when the guide surface of the first slider (24) and the guide surface of the center (27) are pressed against each other, the first slider (24) provides the second slider (26) with a force of compressing the spring (28) so that the second slider (26) is retracted relative to the first slider (24).

5. The T-shaped shaft positioning mechanism suitable for manufacturing of the industrial Internet of things as claimed in claim 4, further comprising a material conveying platform (1) provided with a conveying groove (11);

the conveying groove (11) is a groove body which is arranged on the top surface of the material conveying platform (1) and the end part of which is connected with the side surface of the material conveying platform (1);

the width of the transmission groove (11) satisfies the following conditions: the T-shaped shaft can be supported on the top surface of the material conveying platform (1) in a mode that the shaft section is accommodated in the conveying groove (11) and two sides of the end cap are hooked on two sides of the conveying groove (11);

the first sliding block (24) can be in butt joint with the end part of the transmission groove (11) during the reciprocating motion process, and the accommodating groove (25) can be used for receiving the T-shaped shaft from the transmission groove (11);

the accommodating groove (25) is constrained in a sliding groove (22) formed by the baffle plate (23) and the material conveying platform (1) along with the motion track of the first sliding block (24);

the material conveying platform (1) and the second sliding block (26) are positioned on different sides of the first sliding block (24);

in the moving direction of the first slide block (24), the outlet of the transmission groove (11) and the tip (27) are staggered.

6. The T-shaped shaft positioning mechanism suitable for manufacturing of the industrial Internet of things as claimed in claim 5, wherein a gap is formed between the baffle plate (23) and the first sliding block (24) and/or between the material conveying platform (1) and the first sliding block (24), and the width of the gap is smaller than the diameter of a T-shaped shaft end cap;

when the tip (27) is inserted into the accommodating groove (25), the tip (27) can provide the following constraint state for the shaft section of the T-shaped shaft: on a pair of opposite sides of the shaft section, one side is in contact with the side face of the material transfer platform (1) and the other side is in contact with the end face of the tip (27).

7. The T-shaped shaft positioning mechanism suitable for manufacturing of the industrial Internet of things as claimed in claim 5, wherein the second sliding block (26) and the first sliding block (24) are both conductors, and the baffle plate (23) is an insulator;

the device also comprises an electrode (29) arranged on the baffle plate (23), wherein the electrode (29) is over against the material outlet end of the conveying groove (11);

after the T-shaped shaft from the transmission groove (11) is received by the accommodating groove (25), the T-shaped shaft supported on the first sliding block (24) is contacted with the electrode (29);

when the accommodating groove (25) moves to the movement track of the tip (27) and the spring (28) is in a free state, the tip (27) and the first sliding block (24) are in a spaced state.

8. The T-shaped shaft positioning mechanism suitable for manufacturing of industrial Internet of things as claimed in any one of claims 1 to 7, wherein a plurality of accommodating grooves (25) are formed in the first sliding block (24), and the accommodating grooves (25) are arranged at intervals along the length direction of the first sliding block (24).

9. The T-shaped shaft positioning mechanism suitable for manufacturing of the industrial Internet of things as claimed in any one of claims 1 to 7, wherein the accommodating groove (25) is a through groove extending up and down;

the lifting device (3) is arranged below the first sliding block (24) and used for lifting the T-shaped shaft in the accommodating groove (25) from the bottom side.

10. A T-shaped shaft positioning method suitable for manufacturing an industrial Internet of things, which is characterized in that the method is based on the positioning mechanism of any one of claims 1 to 9;

the positioning method comprises the following operation steps:

s1, driving the accommodating groove (25) to move to a T-shaped shaft receiving station along with the first sliding block (24) through the driving part (21), obtaining a T-shaped shaft through a notch on one side of the accommodating groove (25), and supporting the T-shaped shaft on the top surface of the first sliding block (24) through the end part of a shaft cap on the T-shaped shaft;

s2, the driving part (21) drives the accommodating groove (25) to move to a T-shaped shaft axis restraining station along with the first sliding block (24), the tip (27) is directly acted on a shaft section of the T-shaped shaft through the other side of the accommodating groove (25) on the T-shaped shaft axis restraining station to provide thrust for the side face of the T-shaped shaft, and the shaft section of the T-shaped shaft opposite to the tip (27) is supported on the rigid supporting face.