CN114074834B - T-shaped shaft positioning mechanism and positioning method suitable for industrial Internet of things manufacturing - Google Patents

Abstract

The invention discloses a T-shaped shaft positioning mechanism and a positioning method suitable for industrial Internet of things manufacturing, wherein the positioning mechanism comprises a distributing device; the material distributing device comprises a first sliding block provided with a containing groove; the accommodating groove is arranged on the top side of the first sliding block; the width of the accommodating groove meets the following conditions: the T-shaped shaft can be supported on the top surface of the first sliding block in a manner 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 accommodating groove is a through groove with two open ends. The positioning method is based on the positioning mechanism, and the T-shaped shaft with specific gesture and position can be obtained by adopting the positioning mechanism and the positioning method provided by the scheme, so that the intelligent manufacturing of the electromechanical valve of the gas meter is facilitated.

Description

T-Shaft Positioning Mechanism and Positioning Method Applicable to Manufacturing of Industrial Internet of Things

technical field

The invention relates to the field of assembly technology, in particular to a T-shaft positioning mechanism and a positioning method suitable for manufacturing of the Industrial Internet of Things.

Background technique

Among the existing smart gas meters, taking IC card smart gas meters as an example, the electromechanical valves used in them generally have three structures:

The electromechanical valve rotates forward and reverse through the motor, the gear drives the worm, and at the same time pushes the rod to move in the spiral groove of the worm to realize the opening and closing of the valve. The characteristic of this type of electromechanical valve is that there is no unloading device, and it will be blocked after the forward and reverse rotations are in place, and its load is also relatively large, which will cause a large current in the control circuit and a large power consumption. And it will also affect the reliability of the control circuit of the main controller valve, shorten the service life of the battery in the controller, and the value of the energy storage capacitor used for closing the valve will be very large, and the positive pressure will close the valve, which is unreliable.

The electromechanical valve rotates forward and reverse through the motor to drive the fan-shaped teeth to rotate, so as to achieve the functions of anti-blocking and quick closing. A further structural feature is that the gear box adopts the anti-lock mechanism composed of the swing plate and the swing gear above the swing plate to mesh with the sector gear and the swing gear fixed above the swing plate and the sector gear, and cooperates with the swing plate to realize Anti-lock function of electromechanical valve. The characteristic of this type of electromechanical valve is that the meshing structure of the swing plate and the fixed swing gear above it and the sector gear cannot realize complete forward and reverse unloading.

The electromechanical valve rotates forward and reverse through the motor, and rotates with incomplete teeth, so as to achieve the functions of anti-blocking and quick closing. A further structural feature is the installation of ratchet double-linked gears, which cooperate with the locking and unlocking of incomplete gears and lock blocks, and can realize complete unloading when the motor is running forward and reverse. The characteristic of this type of electromechanical valve is that since the spool of the electromechanical valve is installed in the shell, enough space must be reserved between the spool and the shell so that the air flow can pass through smoothly and the electromechanical valve will not be affected by excessive pressure loss. Card meter performance, so the overall size of the electromechanical valve is relatively large, and cannot be installed in the aluminum shell gas meter.

On the basis of the structure and characteristics of the existing type of electromechanical valve, the applicant previously proposed a gas meter electromechanical valve solution as described in the application number CN201220463732.0. In this scheme, a technical scheme is proposed that uses the motor as the power source, and uses the power output by the motor as the power to drive the linear movement of the sealing ring cap through a gearbox including multi-stage gears, and then through incomplete gears. The scheme can effectively solve the volume problem, stall problem, reliability problem and response speed problem of the electromechanical valve.

In further application or as a preferred mode, regarding the gear shaft corresponding to each gear in the multi-stage gear, on the premise of satisfying the design of miniaturization and compact structure, a T-shaped shaft can be used as the gear shaft of some or all gears, Utilizing the structural characteristics of the shaft section and the shaft cap of the T-shaft, after the end surface of the shaft cap is attached to the surface of the gearbox end plate, the unidirectional positioning of the T-shaft can be realized and the shaft section can be constrained by the surface of the hole on the end plate as much as possible to lift the shaft. The matching area of the gear shaft and the end plate ensures the life of the electromechanical valve. Different from the traditional gear shaft, the T-shaft has a relatively small size. Therefore, in the prior art, considering the difficulty of implementation, the conventional method is still to complete the assembly of the electromechanical valve by manual assembly.

Proposing a process and corresponding equipment that can realize the intelligent manufacturing of smart gas meters to ensure the assembly quality and efficiency of gas meters is undoubtedly of great significance to the development of the industry.

Contents of the invention

Aiming at the above-mentioned technical problem of proposing a process and corresponding equipment that can realize the intelligent manufacturing of intelligent gas meters to ensure the assembly quality and assembly efficiency of gas meters, it is undoubtedly of great significance to promote the development of the industry. The present invention provides A T-shaft positioning mechanism and positioning method suitable for industrial Internet of Things manufacturing. Using the positioning mechanism and method proposed in this scheme, a T-shaft with a specific posture and position can be obtained, which is convenient for clamping the T-shaft in the later stage, and is conducive to the realization of intelligent manufacturing of gas meter electromechanical valves.

In view of the above problems, the T-shaft positioning mechanism suitable for industrial Internet of Things manufacturing provided by the present invention solves the problem through the following technical points: the T-shaft positioning mechanism suitable for industrial Internet of Things manufacturing includes a material distribution device;

The distributing device includes a first slider provided with a receiving groove;

The accommodating groove is arranged on the top side of the first slider;

The width of the accommodating groove satisfies that the T-shaft can be supported on the top surface of the first slider in such a way that the shaft section is accommodated in the accommodating groove, and both sides of the end cap are hooked to both sides of the accommodating groove;

The accommodating groove is a through groove with both ends open.

In the existing technology, the industrial Internet of Things technology is continuously integrated into all aspects of industrial production because of its advantages of effectively improving manufacturing efficiency, improving product quality, reducing manufacturing costs and resource consumption. The key technologies of the Industrial Internet of Things include sensor technology , equipment technology, network technology, information processing technology, security technology, etc. Among them, sensor technology and equipment technology can be considered as the front end of the overall industrial Internet of things, and information processing technology and security technology are generally considered to be The back end of the Industrial Internet of Things, the above front end is the perception control layer (perception control platform) including the equipment part and the sensor part. In order to realize the intelligent assembly of the reducer, the specific assembly process design of the reducer with the sensory control layer as the carrier is one of the key technologies. This solution aims at the small size and light weight of the T-shaft of the Internet of Things gas meter, and provides a method: it can weaken the requirements for the input of the front end of the T-shaft, and realize that the T-shaft can perform subsequent feeding actions in a single individual way; The structure and process design can be directly used in the later T-shaft assembly, which is conducive to the realization of the technical solution for the intelligent manufacturing of electromechanical valves for gas meters.

Specifically, the above first slider is used in conjunction with a driving device, and the driving device is used to drive the first slider to perform reciprocating motion, preferably linear reciprocating motion. More specifically:

Firstly, through the drive part, drive the accommodation tank to move with the first slider to the T-shaft material receiving station. For example, the front-end material source of the T-shaft comes from the vibrating plate, and the T-shape can be obtained through the notch on one side of the accommodation tank. Shaft, by limiting the width of the receiving groove, the T-shaped shaft can be supported on the top surface of the first slider through the end of the shaft cap on it, and the constraint form of the first slider to the T-shaped shaft can make The T-shaft can swing under its own weight to initially constrain the axial direction of the T-shaft, and the above-mentioned restraint method for the T-shaft can enable it to be continuously transmitted in a relatively stable posture in the axial direction;

Then, through the drive part, the accommodating groove is driven to move with the first slide block to the T-shaft axis constraining station, and when moving to the T-shaft axis constraining station that is staggered between the accommodating groove and the receiving station, through the accommodating groove The other side of the tank, that is, the other side of the feed side of the storage tank, uses the top to directly act on the shaft section of the T-shaft to provide thrust for the side of the T-shaft, and the T-shaft section on the opposite side of the top is supported on a rigid The method on the support surface enables a pair of opposite sides of the T-shaft to be rigidly constrained. In this way, the specific orientation of the T-shaft axis can be obtained by finely positioning the T-shaft through the corresponding top end surface and rigid support surface.

Then, after grabbing the T-shaft with a specific axis by the grabbing device, if it is set so that the axis direction of the T-shaft at this time is parallel to the axis of the corresponding shaft hole on the cover plate of the reduction box, you can pass along the axis line The way of movement completes the assembly of the T-shaft on the gearbox cover.

Therefore, using the positioning mechanism and positioning method provided by this scheme, a T-shaft with a specific posture and position can be obtained, which is beneficial to the intelligent manufacturing of electromechanical valves for gas meters.

As a further technical solution of the T-shaft positioning mechanism suitable for industrial Internet of Things manufacturing:

In order to utilize the gravity of the T-shaft, so that the T-shaft is initially supported by the first slider in a vertical posture as much as possible, so that the subsequent clamping device can obtain the T-shaft in a specific axis direction, it is set as: the accommodating groove The groove depth direction is in the vertical direction. In the specific application of this scheme, it is considered that the T-shaped shaft should adopt the following structural form: the shaft cap end of the T-shaped shaft has a plane perpendicular to the axis of the T-shaped shaft or when the shaft cap faces upward, the lower edge of the shaft cap end is in line with the T The axis of the type shaft is vertical, so the surface of the first slider on the upper side of the receiving groove used to contact the T-type shaft is a horizontal plane; for example, if the lower edge of the shaft cap end is a spherical surface, it should be set as the bottom of the shaft cap end. According to the scheme of forming a ball hinge with the first slider, the top surface area where the first slider interacts with the T-shaped shaft is a concave surface consistent with the shape of the spherical surface. That is to say, as a person skilled in the art, the gist of this solution is to obtain a vertically supported T-shaped shaft as much as possible. When designing the top surface form of the first slider, the corresponding design is carried out according to the specific shape of the cap end of the T-shaped shaft. Think of alternatives for the same.

More perfect, as a specific scheme for using the above accommodation grooves to realize precise positioning of the T-shaped shaft, it is set as follows: the material distribution device also includes a driving part, and the driving part is used to drive the first slider to reciprocate Movement; the distributing device also includes a second slider with one end facing the moving track of the holding tank, and the end of the second sliding block facing the moving track of the holding tank is also provided with a top, and the top can be embedded in the side of the holding tank in the holding tank. In the specific application of this scheme, the first slider slides to the movement track of the tip and stops sliding. By inserting the tip into the accommodation groove, the end of the tip can be used to provide constraints on the side of the T-shaped shaft section to achieve further constraints. The orientation of the axis of the T-shaft provides deflection constraints for the deflection of the T-shaft. The second slider used in this solution preferably adopts a flat plate structure, and the second slider is horizontally placed in specific use, so as to form a bottom surface support by providing a baffle plate based on the following disclosure for the bottom of the second slider, so that The second sliding block has a stable motion track to facilitate the matching accuracy of the top and the receiving groove. In this way, one side of the receiving groove is used for the T-shaped shaft to be introduced from the transmission groove, and the other side is used for the top to be introduced, and the movement track of the first slider is in close contact with the side of the material conveying platform. In this solution, the driving component can be a driving cylinder, and considering the accuracy requirements of the first slider’s stop position, it is further set as follows: a limiting device is set on the moving path of the first slider and/or the piston rod of the driving cylinder, So that when the first slider moves to the top matching station, the precise positioning of the first slider's rest position can be realized under the action of the limit device. The specific implementation form of the limit device can be a stroke adjustment block as a limit screw, so that the stroke adjustment block is in direct contact with the first slider and/or the piston rod of the driving cylinder to achieve the position of the first slider at the required position. constraint.

As a further implementation form of the material distribution device, it is set that: the material distribution device also includes a baffle;

The second slider is slidably supported on the baffle;

The distributing device also includes a spring for providing sliding driving force for the second slider;

Both the front end of the first slider and the top side have guide surfaces;

The guide surface is used to realize: when the guide surface of the first slider and the guide surface of the tip are pressed against each other, the first slider provides a compression spring for the second slider, so that the second slider is relative to the first slider. back force. The purpose of this solution is to provide a material distribution device solution in which the movement of the second slider does not require an additional power device. In a specific application, the spring is used to store force when the second slider retreats, and is installed such that the tip can be embedded into the receiving groove under the force of the spring. In this way, when the first slider is moving toward the top, the front end of the first slider cooperates with the guide surface on the side of the top, and the first slider squeezes the top to make the second slider retreat. When the moving apex is in a positive relationship with the accommodating groove, the apex is embedded in the accommodating groove under the spring force. When the first slider needs to further advance or retreat relative to the top, the second slider can be driven back during the further movement of the first slider by setting the surface at the end position of the side of the receiving groove as a guide surface. retreat. Preferably, in this solution, a hole is set on the baffle to constrain the position of the second slider in the direction of movement of the first slider, and the spring is a helical spring whose axis is perpendicular to the direction of movement of the first slider . In this way, by optimizing the side wear of the second slide block, the accuracy of the movement track of the center during long-term use of the positioning mechanism can be improved.

As a more complete system, it can input a T-shaft for the material distribution device, and at the same time, the material transmission platform and baffle can be used to provide anti-drop constraints for the T-shaft, and the material transmission platform can be used to cooperate with the top to realize the T-shaft. The technical scheme of the rigid constraint in the final axis direction is set to: also include a material transfer platform provided with a transfer trough;

The conveying trough is a trough arranged on the top surface of the material conveying platform, the end of which is connected to the side of the material conveying platform;

The width of the transmission groove satisfies: the T-shaped shaft can be accommodated in the shaft section and hooked on both sides of the end cap to the two sides of the transmission groove, and supported on the top surface of the material transmission platform;

During the reciprocating movement of the first slider, the receiving groove can be docked with the end of the transmission groove to receive the T-shaped shaft from the transmission groove;

The accommodating groove is constrained in the chute surrounded by the baffle plate and the material conveying platform along with the movement track of the first slider;

The material transfer platform and the second slider are located on different sides of the first slider;

In the moving direction of the first slider, the positions of the outlet of the transmission groove and the top are staggered.

In this solution, first of all, by limiting the shape, position and size of the transmission groove, a vibration plate can be matched at the front end, and the posture of the T-shaped shaft is relatively stable when it is transmitted in the transmission groove, and can be realized by the weight of the T-shaped shaft itself. The technical scheme of self-adjustment of the T-shaft attitude; secondly, in the transmission groove, the shaft caps between adjacent T-shafts can be pushed against each other to realize the continuous output of the T-shaft in the transmission groove; secondly, the first slider cooperates The material conveying platform is also defined as follows: the accommodation groove is constrained in the chute surrounded by the baffle plate and the material conveying platform along with the movement track of the first slider, so that when the positions of the accommodation groove and the transmission groove are staggered, the first sliding block can be used. The side of a slider provides T-shaft anti-drop protection for the transmission groove; secondly, it is defined as: in the direction of movement of the first slider, the positions of the outlet of the transmission groove and the top are staggered, that is, the first slider is used to constrain T After the T-shaped shaft moves further from the output end of the transmission trough, the side of the material transfer platform can be used to match the top to realize the final positioning of the T-shaped shaft axis.

In order to improve the efficiency of the transfer of the first slider and realize the axial positioning of the T-shaped shaft, it is set as follows: the first slider is provided with a plurality of accommodation grooves, and the accommodation grooves are arranged at intervals along the length direction of the first slider . When this solution is used in practice, multiple stop states of the first slider are obtained on the moving track of the first slider under the action of the driving component. Each stop state corresponds to the transmission groove to realize T-shaped shaft material receiving, and the corresponding top to realize T-shaped Shaft axis positioning, the transfer and axis positioning of multiple T-shafts can be completed within one action cycle of the driving parts. In specific application, it is advisable to adopt: the movement mode of the first slider is to do linear reciprocating motion in the horizontal direction, so that when the positions of the driving parts, the material conveying platform and the baffle are fixed in the space, each accommodating groove During the position change process, it is very convenient to match the exit position of the transmission groove and the end position of the top moving towards the first slider. For example, when using a driving cylinder whose axis is in the horizontal direction as the driving component, the extension length of the piston rod of the driving cylinder can be controlled so that each receiving groove is located at a station that meets the process requirements.

There is a gap between the baffle plate and the first slider and/or between the material transfer platform and the first slider, and the width of the gap is smaller than the diameter of the T-shaped shaft end cap;

When the top is embedded in the receiving groove, the top can provide the following constraints for the shaft section of the T-shaft: On a pair of opposite sides of the shaft section, one side is in contact with the side of the material transfer platform, and the other side is in contact with the top end contact. The structural design of this scheme is firstly to use the side of the material transfer platform and the side of the baffle to provide a movement gap for the first slider, and the movement track of the accommodation groove is located in the chute to avoid the failure of the restraint of the accommodation groove to the T-shaft; Secondly, by defining a gap between the baffle plate and the first slider and/or between the material delivery platform and the first slider, and by limiting the width of the gap, the T-shaped shaft enters the receiving groove from the transmission groove Finally, in view of the T-shaft along the length direction of the transmission groove, the front and rear of the lower end are skewed, and the shaft caps overlap. In the groove, even if the gap width between the material delivery platform and the baffle is greater than or equal to twice the diameter of the T-shaft shaft cap, the movement speed of the first slider can be controlled so that only one T-shaft is allowed to enter at a time. in the holding tank. Preferably, considering that during the transmission of the T-shaped shafts, due to mutual extrusion and vibration, such as the swing of the T-shaped shafts perpendicular to the extension direction of the transmission groove, the shaft section of the T-shaped shaft is embedded in the gap, and the width of the gap is It may be further set that: the width of the gap is smaller than the diameter of the T-shaped shaft section.

As a structural basis that can rely on other components on the mechanism, under the condition of low cost and reliable detection results, the T-shaft successfully enters the accommodation groove, and the accommodation groove successfully transfers the T-shaft to the top constraint station. The technical solution is set as follows: both the second slider and the first slider are conductors, and the baffle is an insulator;

It also includes an electrode installed on the baffle, and the electrode is facing the material outlet end of the transmission tank;

After the receiving groove receives the T-shaped shaft from the transmission groove, the T-shaped shaft supported on the first slider contacts the electrode;

When the accommodating groove moves to the movement track of the apex and the spring is in a free state, the apex and the first slide block are spaced apart from each other. This solution provides a technical solution that uses whether the detection circuit is electrically conductive as a detection and judgment condition. Specifically, based on the fact that the T-shaft itself is generally a metal conductive material, the T-shaft cooperates with the electrode to form a storage tank feeding detection, and the T-shaft cooperates with the second slider to form an axis-constrained station feeding detection. More specifically, for example, the first slider is connected to the electrode through the T-shaped shaft to realize the feeding detection of the storage tank; the first slider is connected to the second slider through the T-shaped shaft to realize the feeding detection of the axis-constrained station . As mentioned above, when the accommodating groove moves to the movement track of the apex, and when the spring is in a free state, the apex and the first slider are spaced apart from each other, that is: after the T-shaped shaft is reliably received in the accommodating groove, When the T-shaft moves to the top constraint station with the first slider, the electrical conduction between the second slider and the first slider is realized through the T-shaft, and at this time it can be judged that the accommodating groove carries the T-shaft effectively; When the accommodating groove is empty, when the accommodating groove moves to the apex constraining station with the first slider and the spring fully restores to deformation, the first slider and the second slider are in a spaced state at this time, so that the first slider There is no electrical conduction with the second slider. At this time, it can be judged that the T-shaft carried by the accommodation slot fails.

Correspondingly, according to the specific judgment structure, it may involve, for example, the residence time control of the first slider receiving material or the start-up control of the driving part, the start-up control of the first slider reset material receiving, fault output or working status feedback control, etc., the above The control is a closed-loop control including the judgment result, so in the specific implementation, the detection circuit can be used as the perception control platform of the control system to obtain the result of electrical conduction; the sensor network platform is used to realize the purpose of local or remote transmission. Perception result signal transmission and specific control signal transmission; the management platform is used to realize the output of specific control signals based on the perception result signal as a judgment basis, combined with judgment logic or settings.

In order to reduce the size requirements of the T-shaft end cap during gripping or to avoid the T-shaft being affected by the damage, it is set as follows: the accommodating groove is a through groove extending up and down;

It also includes a jacking device arranged under the first slide block for jacking up the T-shaped shaft in the accommodation groove from the bottom side. When this solution is used in practice, after the accommodation groove on the first slider moves to the clamping station of the clamping device, the T-shaft is lifted from the bottom side of the accommodation groove through the jacking device, so that the T-shaft After the shaft cap is moved up, it can be clamped to the T-shaft more smoothly and reliably. As a person skilled in the art, regarding the structural design of the first slider, it is provided that the first slider includes a base plate and an extension part that is integral with the base plate, and that the receiving groove is formed between the extension parts.

This solution also discloses a T-shaft positioning method applicable to the manufacturing of the Industrial Internet of Things, which is based on the positioning mechanism described in any one of the above;

The positioning method includes the following steps:

S1. Through the driving part, drive the receiving tank to move with the first slider to the T-shaped shaft material receiving station, and obtain a T-shaped shaft through the notch on one side of the receiving tank, and the T-shaped shaft passes through it The end of the shaft cap is supported on the top surface of the first slider;

S2. Through the driving part, drive the accommodation groove to move with the first slider to the T-shaft axis restraint station, and at the T-shaft axis restraint station, through the other side of the accommodation groove, use the top to directly act on the T-shaft axis. The shaft section of the T-shaft provides thrust for the side of the T-shaft, and the T-shaft section on the opposite side of the top is supported on a rigid support surface.

The above method is the use method of the above positioning mechanism. With this method, not only can the T-shaft be divided into individual materials when the source of the T-shaft is simple, but at the same time, the simple structure can be used in the process of material distribution. and method, realize axis position limitation for T-shafts with relatively small size, so that during the subsequent transfer and assembly of T-shafts, the subsequent acquisition, transfer and assembly. Ultimately realize the intelligent manufacturing of gas meter electromechanical valves or provide the structure and method basis for the intelligent manufacturing.

The present invention has the following beneficial effects:

This solution aims at the small size and light weight of the T-shaft of the Internet of Things gas meter, and provides a method: it can weaken the requirements for the input of the front end of the T-shaft, and realize that the T-shaft can perform subsequent feeding actions in a single individual way; The structure and process design can be directly used in the later T-shaft assembly, which is conducive to the realization of the technical solution for the intelligent manufacturing of electromechanical valves for gas meters.

Specifically, the above first slider is used in conjunction with a driving device, and the driving device is used to drive the first slider to perform reciprocating motion, preferably linear reciprocating motion. More specifically:

Firstly, through the drive part, drive the accommodation tank to move with the first slider to the T-shaft material receiving station. For example, the front-end material source of the T-shaft comes from the vibrating plate, and the T-shape can be obtained through the notch on one side of the accommodation tank. Shaft, by limiting the width of the receiving groove, the T-shaped shaft can be supported on the top surface of the first slider through the end of the shaft cap on it, and the constraint form of the first slider to the T-shaped shaft can make The T-shaft can swing under its own weight to initially constrain the axial direction of the T-shaft, and the above-mentioned restraint method for the T-shaft can enable it to be continuously transmitted in a relatively stable posture in the axial direction;

Then, through the drive part, the accommodating groove is driven to move with the first slide block to the T-shaft axis constraining station, and when moving to the T-shaft axis constraining station that is staggered between the accommodating groove and the receiving station, through the accommodating groove The other side of the tank, that is, the other side of the feed side of the storage tank, uses the top to directly act on the shaft section of the T-shaft to provide thrust for the side of the T-shaft, and the T-shaft section on the opposite side of the top is supported on a rigid The method on the support surface enables a pair of opposite sides of the T-shaft to be rigidly constrained. In this way, the specific orientation of the T-shaft axis can be obtained by finely positioning the T-shaft through the corresponding top end surface and rigid support surface.

Then, after grabbing the T-shaft with a specific axis by the grabbing device, if it is set so that the axis direction of the T-shaft at this time is parallel to the axis of the corresponding shaft hole on the cover plate of the reduction box, you can pass along the axis line The way of movement completes the assembly of the T-shaft on the gearbox cover.

Therefore, using the positioning mechanism and positioning method provided by this scheme, a T-shaft with a specific posture and position can be obtained, which is beneficial to the intelligent manufacturing of electromechanical valves for gas meters.

The above method is the use method of the above positioning mechanism. With this method, not only can the T-shaft be divided into individual materials when the source of the T-shaft is simple, but at the same time, the simple structure can be used in the process of material distribution. and method, realize axis position limitation for T-shafts with relatively small size, so that during the subsequent transfer and assembly of T-shafts, the subsequent acquisition, transfer and assembly. Ultimately realize the intelligent manufacturing of gas meter electromechanical valves or provide the structure and method basis for the intelligent manufacturing.

Description of drawings

Fig. 1 is a structural schematic diagram of a specific embodiment of a T-shaft positioning mechanism suitable for industrial Internet of Things manufacturing described in this scheme, which is a three-dimensional schematic diagram of the overall structure;

Fig. 2 is a structural schematic diagram of a specific embodiment of the T-shaft positioning mechanism suitable for industrial Internet of Things manufacturing described in this solution, which is a rear view;

Fig. 3 is a structural schematic diagram of a specific embodiment of the T-shaft positioning mechanism suitable for industrial Internet of Things manufacturing described in this solution, which is a schematic diagram of the top structure of the positioning mechanism;

FIG. 4 is a partially enlarged view of part A shown in FIG. 3 .

The reference signs in the accompanying drawings are respectively: 1. material conveying platform, 11. transmission trough, 2. material distribution device, 21. driving component, 22. chute, 23. baffle plate, 24. first slider, 25 , receiving groove, 26, the second slider, 27, top, 28, spring, 29, electrode, 3, jacking device.

Detailed ways

Below in conjunction with embodiment the present invention is described in further detail, but the present invention is not limited to following embodiment:

Example 1:

As shown in Figures 1 to 4, the T-shaped shaft positioning mechanism suitable for industrial Internet of Things manufacturing includes a material distribution device 2;

The distributing device 2 includes a first slider 24 provided with a receiving groove 25 thereon;

The receiving groove 25 is arranged on the top side of the first slider 24;

The width of the accommodating groove 25 satisfies that: the T-shaped shaft can be accommodated in the accommodating groove 25 with its shaft section, and the two sides of the end cap are hooked on both sides of the accommodating groove 25, and supported on the top surface of the first slider 24;

The accommodating groove 25 is a through groove with two ends open.

This solution aims at the small size and light weight of the T-shaft of the Internet of Things gas meter, and provides a method: it can weaken the requirements for the input of the front end of the T-shaft, and realize that the T-shaft can perform subsequent feeding actions in a single individual way; The structure and process design can be directly used in the later T-shaft assembly, which is conducive to the realization of the technical solution for the intelligent manufacturing of electromechanical valves for gas meters.

Specifically, the above first slider 24 is used in conjunction with a driving device, and the driving device is used to drive the first slider 24 to perform reciprocating motion, preferably linear reciprocating motion. More specifically:

First of all, through the driving part 21, the drive accommodation groove 25 moves to the T-shaft material receiving station along with the first slider 24. For example, the front end material source of the T-shaft comes from the vibrating plate, and passes through the groove on one side of the accommodation groove 25. A T-shaped shaft is obtained through the mouth, and by limiting the width of the receiving groove 25, the T-shaped shaft can be supported on the top surface of the first slider 24 through the end of the shaft cap on it, and the above first slider 24 is opposite to T The constraint form of the T-shaft can make the T-shaft swing under its own weight, so as to preliminarily constrain the axial direction of the T-shaft, and the above-mentioned constraint method for the T-shaft can enable it to be moved with a relatively stable posture in the axial direction. continue to pass;

Then, through the driving part 21, the drive accommodation groove 25 moves with the first slide block 24 to the T-shaft axis restraint station, and moves to the T-shaft axis restraint station where the accommodation groove 25 and the material receiving station are staggered. , through the other side of the receiving groove 25, that is, the other side of the feeding side of the receiving groove 25, the tip 27 is used to directly act on the shaft section of the T-shaped shaft to provide thrust for the side of the T-shaped shaft, and the opposite side of the tip 27 The way that the T-shaft shaft section is supported on the rigid support surface enables a pair of opposite sides of the T-shaft to be rigidly constrained. In this way, the T-shaft can be precisely positioned through the corresponding end face of the top 27 and the rigid support surface. Get a specific T-shaft axis orientation.

Then, after grabbing the T-shaft with a specific axis by the grabbing device, if it is set so that the axis direction of the T-shaft at this time is parallel to the axis of the corresponding shaft hole on the cover plate of the reduction box, you can pass along the axis line The way of movement completes the assembly of the T-shaft on the gearbox cover.

Therefore, using the positioning mechanism and positioning method provided by this scheme, a T-shaft with a specific posture and position can be obtained, which is beneficial to the intelligent manufacturing of electromechanical valves for gas meters.

Example 2:

This embodiment is further optimized and refined on the basis of Embodiment 1:

In order to utilize the gravity of the T-shaft, so that the T-shaft is initially supported by the first slider 24 in a vertical posture as much as possible, so that the subsequent clamping device can obtain a T-shaft in a specific axial direction, it is set as follows: the accommodating The groove depth direction of the groove 25 is in the vertical direction. In the specific application of this scheme, it is considered that the T-shaped shaft should adopt the following structural form: the shaft cap end of the T-shaped shaft has a plane perpendicular to the axis of the T-shaped shaft or when the shaft cap faces upward, the lower edge of the shaft cap end is in line with the T The axis of the type shaft is vertical, so the surface of the first slider 24 on the upper side of the receiving groove 25 used to contact the T-type shaft is a horizontal plane; for example, if the lower edge of the shaft cap end is a spherical surface, it should be set as a shaft cap The lower edge of the end forms a ball hinge with the first slider 24, and the top surface area where the first slider 24 interacts with the T-shaped shaft is a concave surface consistent with the spherical shape. That is, as a person skilled in the art, the gist of this solution is to obtain the T-shaped shaft supported vertically as much as possible. When designing the top surface form of the first slider 24, the corresponding design is carried out according to the shape of the cap end of the specific T-shaped shaft. An alternative to the above idea.

Example 3:

This embodiment is further optimized and refined on the basis of Embodiment 1:

More perfect, as a specific solution for using the above accommodation groove 25 to realize precise positioning of the T-shaped shaft, it is set as follows: the material distribution device 2 also includes a driving part 21, and the driving part 21 is used to drive the first A slider 24 reciprocates; the distributing device 2 also includes a second slider 26 whose end is moving toward the accommodation groove 25, and the second slider 26 is also provided with a top 27 toward the end of the movement trajectory of the accommodation groove 25, The tip 27 can be inserted into the receiving groove 25 from the side of the receiving groove 25 . When this program is used in practice, the first slider 24 slides to the movement track of the top 27 and then stops sliding, and the top 27 is embedded in the receiving groove 25, and the end of the top 27 can be used to provide the side surface of the T-shaped shaft section. constraints to achieve the purpose of further restricting the orientation of the T-shaft axis and providing deflection constraints for the deflection of the T-shaft. The second slider 26 used in this solution preferably adopts a flat plate structure, and in specific use, the second slider 26 is placed flat to form a bottom surface by providing the bottom of the second slider 26 with a baffle plate 23 based on the following disclosure Support, so that the second slider 26 has a stable trajectory to facilitate the matching accuracy of the top 27 and the receiving groove 25 . In this way, one side of the receiving groove 25 is used for the introduction of the T-shaft from the transmission groove 11 , and the other side is used for the introduction of the tip 27 , and the movement track of the first slider 24 is adjacent to the side of the material transfer platform 1 . In this solution, the driving part 21 can be a driving cylinder. Considering the accuracy requirements of the first slider 24, it is further set to: set a limit on the moving path of the first slider 24 and/or the piston rod of the driving cylinder. Positioning device, so that when the first sliding block 24 moves to the matching position of the top 27, the first sliding block 24 can be precisely positioned at the stop position under the action of the limiting device. The specific implementation form of the limit device can be a stroke adjustment block as a limit screw, so that the stroke adjustment block is in direct contact with the first slider 24 and/or the piston rod part of the drive cylinder, so that the first slider can be positioned at the required position. 24 position constraints.

As a further implementation form of the material distribution device 2, it is set as follows: the material distribution device 2 also includes a baffle 23;

The second slider 26 is slidably supported on the baffle plate 23;

The material distributing device 2 also includes a spring 28 for providing sliding driving force for the second slider 26;

Both the front end of the first slider 24 and the side of the top 27 have guide surfaces;

The guide surface is used to realize: 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 a compression spring 28 for the second slider 26, so that the second slider 26 Retraction force relative to the first slider 24 . This solution aims to provide a solution for the material distribution device 2 in which the movement of the second slider 26 does not require an additional power device. In actual operation, the spring 28 is used to store force when the second slider 26 retreats, and is installed such that the tip 27 can be embedded into the receiving groove 25 under the force of the spring 28 . In this way, when the first slider 24 advances toward the trajectory of the top 27, the front end of the first slider 24 cooperates with the guide surface on the side of the top 27, and the first slider 24 squeezes the top 27 so that the second slider 26 retreats. , when the first slider 24 continues to move and the tip 27 is in a direct relationship with the receiving groove 25 , the tip 27 is inserted into the receiving groove 25 under the force of the spring 28 . When the first slider 24 needs to further advance or retreat relative to the top 27, by setting the surface at the end position of the side of the receiving groove 25 as a guide surface, it can be realized that the first slider 24 can be driven in the process of further movement. The second slide block 26 rolls back. Preferably, in this solution, a hole is set on the baffle plate 23 to constrain the position of the second slider 26 in the direction of movement of the first slider 24, and the spring 28 adopts a spiral type, and the axis moves with the first slider 24 Direction is perpendicular to the spring 28. In this way, by optimizing the side wear of the second slide block 26, the motion trajectory accuracy of the center point 27 during the long-term use of the positioning mechanism can be improved.

As a more complete system, the T-shaped shaft can be input to the material distribution device 2, and the material transmission platform 1 and the baffle 23 can be used to provide anti-drop constraints for the T-shaped shaft, and the material transmission platform 1 can be used to cooperate with the top 27. , the technical solution for realizing the rigid constraint of the final axial direction of the T-shaped shaft is set as: also including a material transfer platform 1 provided with a transfer groove 11 thereon;

The transfer trough 11 is a trough body arranged on the top surface of the material transfer platform 1, the end of which is connected to the side of the material transfer platform 1;

The width of the transmission groove 11 satisfies: the T-shaped shaft can be accommodated in the transmission groove 11 by the shaft section, and the two sides of the end cap are hooked on both sides of the transmission groove 11, and supported on the top surface of the material transmission platform 1;

During the reciprocating movement of the first slider 24, the receiving groove 25 can be docked 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 the chute 22 surrounded by the baffle plate 23 and the material transfer platform 1 along with the movement track of the first slider 24;

The material transfer platform 1 and the second slider 26 are located on different sides of the first slider 24;

In the moving direction of the first slider 24 , the positions of the outlet of the transmission groove 11 and the top 27 are staggered.

In this solution, firstly, by limiting the shape, position, and size of the transmission groove 11, a vibration plate can be matched at the front end, and the posture of the T-shaft is relatively stable when it is transmitted in the transmission groove 11, and the T-shaft itself can be used. The weight realizes the technical scheme of self-adjustment of the T-shaft attitude; secondly, in the transmission groove 11, the shaft caps between adjacent T-shafts can be used to push each other to realize the continuous output of the T-shaft in the transmission groove 11; secondly, the first A slide block 24 cooperates with the material transfer platform 1, and is defined as: the receiving groove 25 is constrained in the chute 22 surrounded by the baffle plate 23 and the material transfer platform 1 along with the motion trajectory of the first slide block 24, so that when the receiving groove 25 and the transfer slot 11 are mutually staggered, the side of the first slider 24 can be used to provide the T-shaped shaft anti-drop protection for the transfer slot 11; The positions of the outlet of the outlet and the top 27 are staggered, that is, after the first slider 24 is used to constrain the T-shaft to move further from the output end of the transmission groove 11, the side of the material delivery platform 1 can be used to match the top 27 to realize the final T-shaft axis orientation.

Example 4:

This embodiment is further optimized and refined on the basis of Embodiment 1:

In order to improve the efficiency of transferring the first slider 24 and realizing the axial positioning of the T-shaped shaft, it is set as follows: the first slider 24 is provided with a plurality of accommodation grooves 25, and the accommodation grooves 25 are arranged along the first slider 24 Arranged at intervals along the length direction. When this solution is used in practice, on the moving track of the first slider 24 under the action of the driving part 21, multiple first sliders 24 stop states are obtained. The top 27 realizes the axis positioning of the T-shafts, that is, the transfer and axis positioning of multiple T-shafts can be completed within one action cycle of the driving part 21 . In specific application, it is advisable to adopt: the motion mode of the first slider 24 is to do a linear reciprocating motion in the horizontal direction, so that when the positions of the driving part 21, the material conveying platform 1, and the baffle plate 23 are fixed in space, This makes it possible for each receiving groove 25 to easily match the exit position of the transmission groove 11 and the final position of the movement of the tip 27 toward the first slider 24 during the position change process. For example, when using a driving cylinder whose axis is in the horizontal direction as the driving component 21, the extension length of the piston rod of the driving cylinder can be controlled so that each receiving groove 25 is located at a station that meets the process requirements.

Example 5:

This embodiment is further optimized and refined on the basis of embodiment 3:

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

After the top 27 is embedded in the receiving groove 25, the top 27 can provide the following constraints 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 of the material transfer platform 1, and the other side is in contact with the material transfer platform 1. The side is in contact with the end face of the tip 27. The structural design of this program, at first is to utilize the side surface of material transfer platform 1 and the side surface of baffle plate 23 to provide movement gap for first slide block 24, and the movement track of passing accommodation groove 25 is positioned at described chute 22 to avoid accommodation groove 25 to T The constraint failure of the type shaft; secondly, there is a gap between the baffle plate 23 and the first slide block 24 and/or between the material transfer platform 1 and the first slide block 24, and by limiting the width of the gap, so that After the T-shaped shaft enters the receiving groove 25 from the transmission groove 11, in view of the situation that the T-shaped shaft is skewed forward and backward along the length direction of the transmission groove 11, the lower end is skewed, and the shaft caps overlap, the width of the gap matches the width of the receiving groove 25, It can make a single T-shaped shaft enter into the accommodation groove 25 more smoothly, even if the gap width between the material transfer platform 1 and the baffle plate 23 is greater than or equal to twice the diameter of the T-shaped shaft shaft cap, it can also pass through the first The movement speed of a slider 24 is controlled so that only one T-shaped shaft is allowed to enter the accommodation groove 25 at a time.

Embodiment 6:

This embodiment is further optimized and refined on the basis of Embodiment 1:

As a structural basis that can rely on other components on the mechanism, under the condition of low cost and reliable detection results, the constraints on the successful entry of the T-shaped shaft into the accommodation groove 25 and the successful transfer of the T-shaped shaft to the tip 27 by the accommodation groove 25 are completed. The technical solution of the station is set as follows: both the second slider 26 and the first slider 24 are conductors, and the baffle plate 23 is an insulator;

It also includes an electrode 29 installed on the baffle plate 23, the electrode 29 is facing the material outlet end of the transmission tank 11;

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

When the accommodating groove 25 moves to the movement track of the apex 27 and the spring 28 is in a free state, the apex 27 and the first sliding block 24 are spaced apart from each other. This solution provides a technical solution that uses whether the detection circuit is electrically conductive as a detection and judgment condition. Specifically, based on the fact that the T-shaped shaft itself is generally 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 an axis-constrained station for feeding. detection. More specifically, for example, the first slider 24 is connected to the electrode 29 through the T-shaped shaft to realize the feeding detection of the accommodating groove 25; the first slider 24 is connected to the second slider 26 through the T-shaped shaft to realize the axis constraint Station feed detection. As mentioned above, when the accommodating groove 25 moves to the motion locus of the apex 27, and when the spring 28 is in a free state, the apex 27 and the first slide block 24 are mutually spaced apart, that is: if the accommodating groove 25 is reliably After receiving the T-shaped shaft, when the T-shaped shaft moves to the top 27 constraint station with the first slider 24, the electrical conduction between the second slider 26 and the first slider 24 is realized through the T-shaped shaft. It is determined that the accommodating groove 25 is effective for carrying the T-shaped shaft; when the accommodating groove 25 is empty, when the accommodating groove 25 moves to the top 27 constraining station with the first slider 24 and the spring 28 completely recovers from deformation, the first slider 24 It is spaced apart from the second slider 26, so that the first slider 24 and the second slider 26 cannot be electrically connected, and at this time it can be determined that the receiving groove 25 carries the T-shaft failure.

Correspondingly, according to the specific judgment structure, it may involve, for example, the residence time control when the first slider 24 receives materials or the start-up control of the driving part 21, the start-up control of the first slider 24 resetting and receiving materials, fault output or working status feedback control etc., the above controls are all closed-loop control including judgment results, so in specific implementation, the detection circuit can be used as the perception control platform of the control system to obtain the result of electrical conduction; the sensor network platform is used to realize local or remote transmission For the purpose of sensing result signal transmission and specific control signal transmission; use the management platform to realize the output of specific control signals based on the sensing result signal as the basis for judgment, combined with judgment logic or settings.

In order to reduce the size requirements of the T-shaft end cap during gripping or to avoid the T-shaft being affected by the damage, it is set as follows: the accommodating groove 25 is a through groove extending up and down;

It also includes a jacking device 3 arranged under the first slide block 24 for jacking up the T-shaped shaft in the accommodation groove 25 from the bottom side. When this solution is used in practice, after the receiving groove 25 on the first slider 24 moves to the clamping station of the clamping device, the T-shaped shaft is lifted from the bottom side of the receiving groove 25 by the jacking device 3, so that After the shaft cap of the T-shaft is moved up, it can be clamped to the T-shaft more smoothly and reliably. As a person skilled in the art, regarding the structural design of the first slider 24, it is set that the first slider 24 includes a base plate and extensions that are integral with the base plate, and that the receiving groove 25 is formed between the extensions.

Embodiment 7:

On the basis of any one of the above embodiments, this embodiment provides a T-shaft positioning method suitable for industrial Internet of Things manufacturing, which is based on the positioning mechanism described in any one of the above;

The positioning method includes the following steps:

S1. Through the driving part 21, drive the receiving groove 25 to move with the first slider 24 to the T-shaped shaft material receiving station, and obtain a T-shaped shaft through the notch on one side of the receiving groove 25, and the T-shaped The shaft is supported on the top surface of the first slider 24 through the end of the shaft cap thereon;

S2. Through the driving part 21, drive the accommodation groove 25 to move with the first slider 24 to the T-shaft axis restraint station, and at the T-shaft axis restraint station, pass through the other side of the accommodation groove 25, use the 27 acts directly on the shaft section of the T-shaft to provide thrust for the side of the T-shaft, and the T-shaft shaft section on the opposite side of the top 27 is supported on a rigid support surface.

The above method is the use method of the above positioning mechanism. With this method, not only can the T-shaft be divided into individual materials when the source of the T-shaft is simple, but at the same time, the simple structure can be used in the process of material distribution. and method, realize axis position limitation for T-shafts with relatively small size, so that during the subsequent transfer and assembly of T-shafts, the subsequent acquisition, transfer and assembly. Ultimately realize the intelligent manufacturing of gas meter electromechanical valves or provide the structure and method basis for the intelligent manufacturing.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific embodiments of the present invention are limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, other implementations obtained without departing from the technical solution of the present invention shall be included in the protection scope of the present invention.

Claims (6)

1. The T-shaft positioning mechanism suitable for the manufacture of the Industrial Internet of Things is characterized in that it includes a material distribution device (2); The distributing device (2) includes a first slider (24) on which a receiving groove (25) is arranged; The receiving groove (25) is arranged on the top side of the first slider (24); The width of the accommodating groove (25) satisfies that: the T-shaped shaft can be accommodated in the accommodating groove (25) with the shaft section, and the two sides of the end cap are hooked on both sides of the accommodating groove (25), and are supported on the first slider ( 24) on the top surface; The accommodating groove (25) is a through groove with openings at both ends; The material distributing device (2) further includes a driving part (21), and the driving part (21) is used to drive the first slider (24) to reciprocate; The material distributing device (2) also includes a second slider (26) with one end facing the moving track of the receiving tank (25), and one end of the second sliding block (26) facing the moving track of the receiving tank (25) is also provided with a A top (27), the top (27) can be embedded in the accommodating groove (25) from the side of the accommodating groove (25); the distributing device (2) also includes a baffle (23); The second slider (26) is slidably supported on the baffle (23); The distributing device (2) further includes a spring (28) for providing sliding driving force for the second slider (26); Both the front end of the first slider (24) and the side of the top (27) have guide surfaces; The guide surface is used to realize: 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 a compression spring for the second slider (26) (28), the force that causes the second slider (26) to retreat relative to the first slider (24); it also includes the material delivery platform (1) on which the transmission groove (11) is arranged; The conveying trough (11) is a trough arranged on the top surface of the material conveying platform (1), and the end part is connected to the side of the material conveying platform (1); The width of the transmission trough (11) satisfies: the T-shaped shaft can be accommodated in the transmission trough (11) and both sides of the end cap are hooked on both sides of the transmission trough (11), and supported on the material transmission platform (1 ) on the top surface; During the reciprocating movement of the first slider (24), the receiving groove (25) can be docked 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 the chute (22) surrounded by the baffle plate (23) and the material conveying platform (1) along with the movement track of the first slider (24); The material transfer platform (1) and the second slider (26) are located on different sides of the first slider (24); In the direction of movement of the first slider (24), the positions of the outlet of the transmission groove (11) and the top (27) are staggered; the second slider (26) and the first slider (24) are conductors , the baffle (23) is an insulator; It also includes an electrode (29) installed on the baffle (23), and the electrode (29) is facing the material outlet end of the transmission tank (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 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 slider (24) are spaced apart from each other. 2. The T-shaft positioning mechanism suitable for industrial Internet of Things manufacturing according to claim 1, characterized in that, the groove depth direction of the accommodation groove (25) is in the vertical direction. 3. The T-shaped shaft positioning mechanism suitable for industrial Internet of Things manufacturing according to claim 1, characterized in that, between the baffle plate (23) and the first slider (24) and/or the material transfer platform ( 1) There is a gap between the first slider (24), and the width of the gap is smaller than the diameter of the T-shaped shaft end cap; When the top (27) is embedded in the receiving groove (25), the top (27) can provide the following constraints for the shaft section of the T-shaped shaft: on a pair of opposite sides of the shaft section, one side is connected to the material transfer platform ( 1) is in contact with the side surface, and the other side is in contact with the end face of the top (27). 4. The T-shaped shaft positioning mechanism suitable for industrial Internet of Things manufacturing according to any one of claims 1 to 3, characterized in that, the first slider (24) is provided with a plurality of receiving grooves (25 ), the accommodating grooves (25) are arranged at intervals along the length direction of the first slider (24). 5. The T-shaped shaft positioning mechanism suitable for manufacturing of the Industrial Internet of Things according to any one of claims 1 to 3, characterized in that, the accommodating groove (25) is a through groove extending up and down; It also includes a jacking device (3) arranged under the first slide block (24) for jacking up the T-shaped shaft in the accommodation groove (25) from the bottom side. 6. The T-shaft positioning method suitable for industrial Internet of Things manufacturing, characterized in that the method is based on the positioning mechanism described in any one of claims 1 to 5; The positioning method includes the following steps: S1. Through the driving part (21), drive the accommodation groove (25) to move with the first slider (24) to the T-shaped shaft material receiving station, and obtain T through the notch on one side of the accommodation groove (25). type shaft, and the T-type shaft is supported on the top surface of the first slider (24) through the end of the shaft cap thereon; S2. Through the driving part (21), drive the accommodation groove (25) to move with the first slider (24) to the T-shaft axis restraint station, and at the T-shaft axis restraint station, pass through the accommodation groove (25 ) on the other side, use the top (27) to directly act on the shaft section of the T-shaft to provide thrust for the side of the T-shaft, and the T-shaft section on the opposite side of the top (27) is supported on a rigid support surface.

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