RU191982U1 - DRIVE SYSTEM WITH DISCRETE MECHANISM OF DISCONNECTION - Google Patents

Abstract

The utility model relates to the field of mechanical engineering, can be used as a drive for gate leaves (swing, sliding, etc.). The technical result is to increase the reliability of the drive system during its long-term operation. An additional advantage is increased usability. A drive system with a discrete trip mechanism, comprising a motor and a gearbox, the output shaft of which is connected to the drive output shaft by a trip mechanism, in the inventive drive system, the trip mechanism and the drive element are located on opposite sides of the gearbox, on a single the axis provided by the coaxial placement of the output shaft of the drive system inside the hollow driven shaft of the gearbox; the teeth transmitting torque between the driven and output shaft form an end gear connection, while the teeth on the driven shaft of the gearbox are stationary in the axial direction, the response teeth on the coupling half connected to the output shaft of the drive system by means of a spline connection have the possibility of axial movement relative to the splines output shaft at a distance greater than the height of the tooth profile; the coupling is controlled by a screw connected to the housing by a thread, while the axial and rotational movements of the screw relative to the stationary housing are converted into axial movement of the coupling half along the splines of the output shaft of the drive system due to the presence of rolling bearings, which allow the transmission of two-way axial force to the coupling half and, as a result, the teeth on it; the locknut combines the functions of a locking element and a wrench. 3 s.p. f-ly. 2 ill.

Description

The utility model relates to the field of engineering and can be used as a drive for gate leaves (swing, sliding, etc.), as well as in devices for opening and closing window, door and other openings, in particular, in security systems of the perimeter of an object.

A known actuator with a trip mechanism, model 884 MS 3PH, of the FAAC company (see www.calameo.com/read/0006815784a6861bedfbf). The main parts of this device are an electric motor and gearbox with a trip mechanism, which includes a friction clutch.

The disadvantages of this drive are: limitation of the pressing force of the working surfaces of the drive and driven drives of the friction clutch, due to the need to maintain the possibility of rotation of the drive drive of the clutch, rigidly connected to the motor shaft, even if the driven drive is jammed, to prevent the motor from malfunctioning; as a consequence of the limitation of the pressing force, slipping of the discs occurs, leading to a strong increase in the temperature of the friction surfaces and the need to remove heat from heated friction surfaces due to the use of special oil of the FAAC HP OIL brand; due to the use of “wet” discs, the design transmits a lower specific torque with respect to “dry” discs and, therefore, has a lower efficiency; periodic monitoring of the friction surfaces of the friction clutch is required.

A drive system with a trip mechanism for controlling the opening or closing of parts of structures such as, for example, window frames is known from the prior art (WO 2013182947, publ. 12.12.2013).

In this system, as in the claimed utility model, there is an electric drive mounted on a fixed part of the frame. A disk with mechanical teeth is fixed to the output shaft of the electric drive, which rotates together with the shaft. The counter drive with the front teeth is rigidly mounted on the rod. One end of the rod is fixed by means of mechanical teeth with the output section of the electric drive shaft, a hinged bearing with a roller is fixed at the second end of the rod, this roller moves along a guide fixed to the sash. The torque from the electric drive is transmitted to the traction only with the help of discs with end teeth. The design has a cylindrical handle pivotally mounted at the end of the output section of the drive shaft. At one end, the handle abuts against traction through an elastic element, thereby compressing disks with end teeth against each other. When the handle is rotated, disks with end teeth are disconnected.

The disadvantages of such a drive system with a trip mechanism are the inability to use a drive with gearboxes for general industrial use, tooth decoupling due to deformation of structural elements, the presence of permanently loaded parts of the trip mechanism and, as a result, a general decrease in the reliability of the entire drive system design.

The closest analogue of the claimed utility model is a drive system (RF patent No. 164901, publ. 09/20/2016).

The drive system includes a drive, an output drive shaft for transmitting torque to the traction, a trip mechanism comprising a drive portion rigidly connected to the drive output shaft, and a driven portion including at least one link and a movable handle for controlling the trip mechanism. The leading and driven parts are made with the possibility of connecting and disconnecting their contact surfaces, each of which is made with the presence of teeth corresponding to depressions located on the other contact surface. In addition, the driven part of the trip mechanism further comprises a guide in the form of a hollow cylinder, rigidly connected to the rod and having an internal threaded connection with the output section of the drive shaft, a locking element with a groove located at the end of the output section of the drive shaft, a latch movably connected to the guide and made with the possibility of moving it into the groove of the locking element, while the contact surface of the driven part of the release mechanism is made on part of the traction surface, or part of the rod, and a movable handle to control the release mechanism is fixed on the guide.

The disadvantage of such a drive system is that the length of the movable handle for controlling the trip mechanism, determined on the basis of the required (predetermined) control effort, exceeds the distance from the axis of rotation of the drive system to the supporting surface, which does not allow it to be carried out in the operational position (vertically, with the drive output shaft down) rotation of the handle around the specified axis by a full revolution without changing the position of the handle in space. The teeth are connected or disconnected with the “shifting” of the handle: from the initial position, when the axis of the handle is aligned with the axis of rotation of the drive system, to the position where the axis of the handle is perpendicular to the axis of rotation of the drive system, with further rotation of the handle in this position in a horizontal plane until the reference surface, further transferring the handle through the initial position to another extreme position, in which the axis of the handle is also perpendicular to the axis of rotation of the drive system, bringing the handle to this plane to a fixed position of the lever of the latch, and the closure of the cycle of connection or separation of the teeth by returning the handle to its original position.

Another disadvantage is the lack of rolling bearings in the design, which increases the friction loss of the mating parts of the drive system structure.

Another disadvantage of the prototype is that the drive element and the trip mechanism are located on one side of the drive system. Such an arrangement of parts of the drive system in some cases, for example, the proximity of a physical obstacle with respect to the drive element and the trip mechanism, limits the operator to the space for performing actions to connect or disconnect the trip mechanism. In addition, the connection or separation of the teeth is carried out with the preliminary pressing of the separately located locking lever and the subsequent rotation of the movable handle, which can be done only by using both hands of the operator.

The technical task of the claimed utility model is to improve technical and operational characteristics.

The technical result is to increase the reliability of the drive system during its long-term operation. An added benefit is enhanced usability. The technical result is achieved due to the presence of rolling bearings and spline connection in the design, a lock nut with handles, combining the functions of the locking element and the wrench, as well as due to the location of the release mechanism and the drive element on opposite sides of the gearbox on a single axis.

To achieve the claimed technical result, a drive system with a discrete trip mechanism is proposed, comprising a motor and a gearbox, the output shaft of which is connected to the drive shaft of the drive system using a trip mechanism, in the inventive drive system, a trip mechanism and a drive element (gear wheel, pulley, sprocket, thrust, etc.) are located on opposite sides of the gearbox, on a single axis, provided by the coaxial placement of the output shaft of the drive system inside the hollow shaft gear shaft; the teeth transmitting torque between the driven and output shaft form an end gear connection, while the teeth on the driven shaft of the gearbox are stationary in the axial direction, the response teeth on the coupling half connected to the output shaft of the drive system by means of a spline connection have the possibility of axial movement relative to the splines output shaft at a distance greater than the height of the tooth profile; the coupling is controlled by a screw connected to the housing by a thread, while the axial and rotational movements of the screw relative to the stationary housing are converted into axial movement of the coupling half along the splines of the output shaft of the drive system due to the presence of rolling bearings, which allow the transmission of two-way axial force to the coupling half and, as a result, the teeth on it. A locknut with handles combines the functions of a locking element and a wrench due to the presence of a shaped hole made on the one hand with an internal thread, a mating thread on the screw, and on the other hand with a polyhedron, corresponding in size to the polyhedron on the screw.

The screw and the counter hole in the housing can be made without thread, while the screw is driven by a hydraulic, pneumatic or electromechanical drive that creates axial movement without the use of a lock nut with handles.

The arrangement of the trip mechanism and the drive element on opposite sides of the gearbox, on a single axis, with the axial placement of the output shaft of the drive system inside the hollow driven shaft of the gearbox, reduces the length of the end section of the output shaft of the drive system by assigning a part of the structure, namely, the trip mechanism, to the opposite drive element side, and thereby reducing the distance between the design points of application of the forces of the drive element, which can be considered a gear wheel, pulley, sprocket, traction, etc., and rolling bearings, which, in turn, helps to reduce the relative total radial reactions of rolling bearings from the forces applied to the drive element, and, consequently, the possibility of using rolling bearings smaller in size and cost. Moreover, reducing the size of rolling bearings helps to reduce the size of other parts mating with them, which also allows you to reduce their size, including the dimensions of the workpieces, weight and cost.

The installation of the output shaft of the drive system on the rolling bearings provides, in addition to the exact centering of the specified shaft relative to the driven shaft of the gearbox, reducing the loss of rotation of the shaft achieved by the design of the rolling bearing, ensuring good lubrication conditions due to the constant lubrication in the contact of the working bodies of the rolling bearing, even at low rotational speed, which is typical both for the considered technical solution, and for low-speed shafts of drive systems and gearboxes in general. In addition, the use of rolling bearings ensures the absence of scoring on the working surfaces of the working bodies of the rolling bearing in relation to the option of installing the shaft on sliding bearings, where, due to insufficient lubrication and the conditions for the appearance of boundary conditions characteristic of low-speed sliding bearings with grease, jamming may occur , reduced wear resistance, increased coefficient of friction.

The presence of splines on the coupling half, designed to be connected to the reciprocal splines on the output shaft of the drive system, allows for a movable splined connection with axial movement of the coupling half, with end teeth located on it, relative to the output shaft of the gearbox with centering and self-alignment of the coupling half under load at a distance greater than the height of the tooth profile, thereby achieving the connection and separation of the driven shaft of the gearbox and the output shaft of the drive system. Due to the presence of a large number of teeth (slots) in diameter, an involute tooth profile with greater relative strength due to the gradual thickening of the teeth to the base and the absence of sharp angles in the profile, i.e. stress concentrators, tooth centering, as well as their length exceeding the diameter, greater torque transmission is achieved with respect to the key, including with several keys, joints. In this case, due to the execution of the teeth and the shaft forming the splines from one workpiece, the teeth are not required to be fixed relative to the shaft, as in the case of movable keys, which are fixed from falling out, which, otherwise, may lead to jamming of the joint during operation.

A locknut with handles combines the functions of a locking element and a wrench, which allows, on the one hand, to securely lock (lock) the face teeth in the connected and disconnected states, and, on the other hand, to refuse to use an additional (separate) wrench.

The indicated advantages of the utility model, as well as its features are explained using the best option for its implementation with reference to the accompanying drawings.

In FIG. 1 and 2 shows a schematic diagram of the claimed utility model, where 1 is the output shaft of the drive system; 2 - roller needle bearing; 3 - ball radial bearing; 4 - driven shaft gear; 5 - slots (spline connection); 6 - coupling half; 7, 8 - end teeth; 9, 18 - sleeve; 10, 11 - ball thrust bearing; 12 - a cover; 13 - screw; 14, 21 - a lock ring; 15 - case; 16 - a lock-nut; 17, 20 - key; 19 - a gear wheel; 22 - thread; 23, 24 - tetrahedron; 25 - handle.

A drive system with a discrete tripping mechanism (Fig. 1), comprising a motor and a gearbox, the output shaft of which is connected to the output shaft of the drive system using a trip mechanism, contains an output shaft 1 of the drive system placed on a single axis on a roller needle bearing 2 and a ball radial bearing 3 inside the hollow driven shaft 4 of the gearbox. A drive element is installed on one side of the output shaft 1 of the drive system, which can be considered a gear wheel, pulley, sprocket, traction, etc., in this case, the gear wheel 19, spaced from the radial ball bearing 3 by the sleeve 18 and mounted on the shaft 1 with the possibility of transmitting torque by means of a key 20 and fixed from axial movement by a locking ring 21. On the opposite side of the output shaft 1 of the drive system, slots 5 are made that mate with the mating slots on the floor coupling 6, while the coupling half 6 is movable in the axial direction relative to the splines 5 of the output shaft 1 of the drive system. On the unidirectional ends of the driven shaft 4 of the gearbox and the coupling half 6, end teeth 7 and 8 are made, respectively. Ball thrust bearings 10 and 11 are installed on the outer contoured surface of the sleeve 9, while the rings of the ball thrust bearing 10 are located between the sleeve 9 and the cover 12, rigidly mechanically connected with the coupling half 6, and the rings of the ball thrust bearing 11 are located between the sleeve 9 and the coupling half 6 s placement of ball thrust bearings 10 and 11 inside the space formed by the configuration of the inner surfaces of the coupling half 6 and cover 12. This arrangement and the principle of operation of the ball thrust bearing in combination They emphasize the ability to transmit two-sided axial forces. The sleeve 9 is mounted on one side of the screw 13 with the possibility of transmitting torque by means of a key 17, which excludes the possibility of unscrewing the screw 13 by thread 22 in the housing 15, and is fixed from axial displacement on the screw 13 by the locking ring 14. On the other side of the screw 13 is made a tetrahedron 24, in cross-sectional shape, it provides a mating connection with a mating tetrahedron on a lock nut 16, and in the middle part of the screw 13, a thread is made on the outer surface corresponding to the internal thread on the housing 15, while the housing 15 is rigidly mechanically connected to gear housing. The housing 15 is structurally made with an internal volume for accommodating the components 5-14, 17. The lock nut 16 with handles 25, in an amount of at least two, with the location of each pair on the same geometric axis, has a shaped hole: on one side with an internal thread, reciprocal the thread 22 on the screw 13, and on the other hand with the quadrangle 23, corresponding in size to the square 24 on the screw 13. The lock nut 16 with the handles 25 constructively combines two functions: when screwing the lock nut 16 with the handles 25 on the thread of the screw 13 until it stops, it performs fun the locking element, which prevents the spontaneous connection and separation of the teeth 7 and 8, when connecting the squares 23, 24, the lock nut 16 with the handles 25 performs the function of a wrench for rotating the screw 13 and connecting and disconnecting the end teeth 7 and 8.

The connection and disconnection of the driven shaft of the gearbox and the output shaft of the drive system is carried out only when the drive is completely stopped.

The operation of the drive with a discrete trip mechanism is illustrated in FIG. 1 and 2.

The separation of the driven shaft of the gearbox and the output shaft of the drive system is as follows (Fig. 1).

The lock nut 16 is loosened by means of the handles 25, after which it is completely screwed off from the thread 22 of the screw 13, turned over and put on the other side, containing a hole in the shape of a tetrahedron, on the counter-tetrahedron, which is located on the screw 13. By means of the handles 25 due to the rigid mechanical connection of the lock nut 16 and the screw 13 in the angular direction, the latter is unscrewed by thread 22 until the sleeve 9 rests in the housing 15. The screw 13 carries the sleeve 9 along, axially fixed relative to the screw 13 with the locking ring 14. Sleeve 9 through the thrust ball bearing 10 and the cover 12 moves the coupling half 6 containing the front teeth 8 in the axial direction along the splines 5, while the front teeth 8 are removed from the teeth 7 to a distance greater than the height of the teeth 7 and 8, which leads to their separation, and, thus, due to the separation of the mechanical connection between the end teeth 7 and 8, the torque from the driven shaft 4 of the gearbox cannot be transmitted to the output shaft 1 of the drive system. The lock nut 16 is removed from the tetrahedron of the screw 13, flipped around the vertical axis to the side containing the thread, and screwed onto the thread 22 of the screw 13 until it stops in the housing 15.

The connection of the driven shaft of the gearbox and the output shaft of the drive system is as follows (Fig. 2).

The lock nut 16 is loosened by means of the handles 25, after which it is completely screwed off from the thread 22 of the screw 13, turned over and put on the other side, containing a hole in the shape of a tetrahedron, on the counter-tetrahedron, which is located on the screw 13. By means of the handles 25 due to the rigid mechanical connection of the lock nut 16 and the screw 13 in the angular direction, the latter is screwed by thread 22 into the housing 15, while the screw 13 through the sleeve 9 and the ball thrust bearing 11 moves the coupling half 6 forward, which, in turn, due to the rigid mechanical In contact with the cover 12, the ball thrust bearing 10 is also entrained, also connected with the sleeve 9. Since the ball thrust bearing 11 abuts against a coupling half 6 containing end teeth 8 and having the possibility of axial movement along slots 5, end teeth 8 are engaged with end faces teeth 7, located on the driven shaft 4 of the gearbox, until they are completely in contact with the surfaces of the mating teeth 7. Thus, by creating a rigid mechanical connection between the working surfaces of the mechanical teeth 7 and 8 are twisting The th moment from the driven shaft 4 of the gearbox can be transmitted to the output shaft 1 of the drive system. The lock nut 16 is removed from the tetrahedron of the screw 13, flipped to the side containing the thread, and screwed onto the thread 22 of the screw 13 until it stops.

The most successfully declared “Drive system with a discrete trip mechanism” is applicable as a gate drive (swing, sliding, etc.), as well as in devices for opening and closing window, door and other openings in the perimeter security systems of an object.

The drive system with a discrete trip mechanism can be used with any commercially available gearboxes with the ability to make the driven shaft hollow.

Claims (4)

1. A drive system with a discrete trip mechanism, comprising a motor and a gearbox, the output shaft of which is connected to the drive output shaft by a trip mechanism, characterized in that the trip mechanism and the drive element are located on opposite sides of the gearbox, on a single axis, provided by coaxial placement the output shaft of the drive system inside the hollow driven shaft of the gearbox; the teeth transmitting torque between the driven and output shaft form an end gear connection, while the teeth on the driven shaft of the gearbox are stationary in the axial direction, the response teeth on the coupling half connected to the output shaft of the drive system by means of a spline connection have the possibility of axial movement relative to the splines output shaft at a distance greater than the height of the tooth profile; the coupling is controlled by a screw connected to the housing by a thread, while the axial and rotational movements of the screw relative to the stationary housing are converted into axial movement of the coupling half along the splines of the output shaft of the drive system due to the presence of rolling bearings, which allow the transmission of two-way axial force to the coupling half and, as a result, the teeth on it; the locknut combines the functions of a locking element and a wrench. 2. The drive system with a discrete trip mechanism according to claim 1, characterized in that the housing in which the screw moves is rigidly connected to the gear housing. 3. The drive system with a discrete trip mechanism according to claim 1, characterized in that the housing in which the screw moves is rigidly connected to the bracket located on the gear housing. 4. The drive system with a discrete trip mechanism according to claim 1, characterized in that the housing in which the screw moves is rigidly connected to the bracket located on the gearbox cover.

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