CN218201691U

CN218201691U - Door opening machine

Info

Publication number: CN218201691U
Application number: CN202222666451.1U
Authority: CN
Inventors: 丁祥
Original assignee: Schindler China Elevator Co Ltd
Current assignee: Schindler China Elevator Co Ltd
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2023-01-03
Anticipated expiration: 2032-10-10

Abstract

The application discloses door operator includes: the gantry crane comprises a gantry crane bottom plate, wherein a plurality of first adjusting holes are formed in the gantry crane bottom plate; wire rope and wire rope overspeed device tensioner, wire rope cover are established on wire rope overspeed device tensioner, and wire rope overspeed device tensioner includes: the base is connected to a bottom plate of the gantry crane and is suitable for rotating around a first axis, and the base is selectively matched with at least one of the first adjusting holes so as to adjust the pressure exerted on the steel wire rope by the tensioning wheel. Through base and the cooperation of first regulation hole, the position relation of adjustable base and door machine bottom plate, and then make the take-up pulley that sets up on the base exert different pressure to wire rope, adjustment wire rope's tensile force, the distribution design of a plurality of first regulation holes in different positions for the base plate tensile force can quantify when cooperating with first regulation hole, only need operate simply can realize adjusting.

Description

Door opening machine

Technical Field

The application relates to the technical field of elevators, in particular to a door opener.

Background

The steel wire rope can ensure the transmission of power, and the proper tensioning is favorable for improving the transmission efficiency and prolonging the service life of the steel wire rope.

At present, a device for adjusting the tension of a steel wire rope is arranged on a door motor of a hall door or an elevator, the tension of the steel wire rope is adjusted by a compression spring and a nut, and the steel wire rope is matched with a steel wire rope wheel for use, and the steel wire rope wheel are independently arranged to cause larger occupied space. In the tension adjusting process, the compression spring is sleeved on the rod with threads, the compression amount of the spring is adjusted by adjusting the position of the nut on the rod, the tension is adjusted in the mode not visual enough, and the experience of maintenance personnel is completely relied on.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving at least one of the problems in the prior art.

For this reason, an aim at of this application provides a door operator, and the wire rope wheel is integrated integrative with the take-up pulley for adjust wire rope's tensioning structure compacter, saved the space, can use simple instrument or manual ration when adjusting the tensile force and adjust, simple and easy convenience.

In order to achieve the above object, the present application provides a door opening machine including: the gantry crane comprises a gantry crane bottom plate, wherein a plurality of first adjusting holes are formed in the gantry crane bottom plate; wire rope and wire rope overspeed device tensioner, the wire rope cover is established on the wire rope overspeed device tensioner, the wire rope overspeed device tensioner includes: the base is connected to the door machine bottom plate and is suitable for rotating around a first axis, and the base is selectively matched with at least one of the first adjusting holes to adjust the pressure exerted on the steel wire rope by the tensioning wheel.

According to the door opening machine of this application, through base and the cooperation of first regulation hole, the position relation of adjustable base and door machine bottom plate, and then make the take-up pulley that sets up on the base apply different pressure to wire rope, adjustment wire rope's tensile force, the distribution design of a plurality of first regulation holes in different positions for the base plate tensile force can quantify when cooperating with first regulation hole, only need simply operate and can realize adjusting.

Furthermore, a first pivot shaft is arranged on the gantry crane bottom plate, the base is connected to the gantry crane bottom plate through the first pivot shaft, the first axis is overlapped with the axis of the first pivot shaft, and the base is suitable for rotating around the axis of the first pivot shaft.

Furthermore, one end of the base is connected to the gantry crane bottom plate through the first pivot shaft, the other end of the base is selectively matched with at least one of the first adjusting holes, and the first adjusting holes are circumferentially arranged at intervals by taking the axis of the first pivot shaft as a circle center and taking the distance from one end of the base to the other end of the base as a radius.

Further, the wire rope tensioning device further comprises: the tensioning wheel is fixed on the adjusting rod, the adjusting rod is suitable for being rotatably arranged on the base around a second axis, and the adjusting rod is suitable for adjusting the pressure applied to the steel wire rope by the tensioning wheel.

Further, the first axis is parallel to the second axis.

Furthermore, a plurality of second adjusting holes are formed in the base, and the adjusting rod can be selectively matched with at least one of the second adjusting holes.

Further, a second pivot shaft is arranged on the base, the adjusting rod is suitable for being rotatably arranged on the base through the second pivot shaft, the second axis is coincident with the axis of the second pivot shaft, and the adjusting rod is suitable for rotating around the axis of the second pivot shaft.

Furthermore, the adjusting rod comprises a first section and a second section, the second section is arranged on the inner side of the first section, the first section and the second section are in smooth transition, the tensioning wheel is fixed on the first section, and a fastening piece matched with the second adjusting hole is arranged on the second section.

Further, the second section is arranged on the inner side of the first section, an avoidance space is limited by the first section and the gantry crane bottom plate, and the tensioning wheel is arranged in the avoidance space and fixed with the inner side of the first section.

Further, the steel wire rope tensioning device further comprises a steel wire rope wheel, the steel wire rope is sleeved on the steel wire rope wheel, and the steel wire rope wheel and the tensioning wheel are arranged in the same plane.

Further, the diameter of the tension pulley is at least 8 times the diameter of the wire rope.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

Other objects and advantages of the present disclosure will become apparent from the following description of the disclosure, which is made with reference to the accompanying drawings, and can assist in a comprehensive understanding of the disclosure.

FIG. 1 is a schematic structural diagram of a door opener according to an embodiment of the present application;

FIG. 2 is an enlarged view of the portion A of FIG. 1;

fig. 3 is a schematic view of a cable tensioner according to an embodiment of the present application;

FIG. 4 is a side view of a wire rope tensioner engaged with a door panel substrate according to an embodiment of the present application.

It is noted that, for the sake of clarity, in the drawings used to describe embodiments of the present disclosure, structures or regions may be enlarged or reduced in size, i.e., the drawings are not drawn to actual scale.

Reference numerals are as follows:

the door opening machine 100 is provided with a door opening device,

a door machine base plate 10, a first adjusting hole 101,

the length of the steel wire rope 20,

the wire rope tensioning device 30, the second adjustment hole 301,

a base 31, a tensioner 32, a first pivot 33,

the adjustment lever 34, the first section 341, the second section 342,

a fastener 35, a wire sheave 36, a second pivot shaft 37,

a slide plate assembly 40.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless defined otherwise, technical or scientific terms used in this disclosure should be given their ordinary meaning as understood by one of ordinary skill in the art. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.

In this document, unless otherwise specifically stated, directional terms such as "upper", "lower", "left", "right", "inner", "outer", and the like are used to indicate orientations or positional relationships based on the orientation shown in the drawings, merely for convenience of describing the present disclosure, and do not indicate or imply that the referenced devices, elements, or components must have a particular orientation, be constructed or operated in a particular orientation. It should be understood that when the absolute positions of the objects to be described are changed, the relative positional relationships they represent may also change accordingly. Accordingly, these directional terms should not be construed as limiting the present disclosure.

The steel wire rope is usually used in bidirectional door opening, such as hall doors, elevator door opening and closing and the like used in business places, the steel wire rope can ensure the transmission of power in the door opening and closing process, and the proper tensioning is beneficial to improving the transmission efficiency and prolonging the service life of the steel wire rope.

At present, a device for adjusting the tension of a steel wire rope is arranged on a hall door or an elevator door motor, the tension of the steel wire rope is adjusted by a compression spring and a nut, and the steel wire rope is matched with a steel wire rope wheel for use, and the steel wire rope wheel are independently arranged to cause larger occupied space. In the tensile force adjustment process, compression spring cover is established on the threaded pole, adjusts the compression volume of spring through the position of adjusting nut on the pole, and then adjusts wire rope's tensile force, and is not enough directly perceived to this mode regulative mode, need rely on maintainer's experience, and whether it is suitable to need maintainer limit to adjust the limit to look over the tensile force in adjustment process, and the instrument in the hand of having put down many times exists during, and the process is extremely troublesome.

The application provides a door opener, wire rope wheel and take-up pulley are integrated integrative for adjust wire rope's tensioning texture compacter, saved the space in the door opener, can use simple instrument or manual ration when adjusting the tensile force and adjust, simple and easy convenience.

The following describes a door opening machine according to an embodiment of the present application with reference to fig. 1 to 4, and it should be noted that the present application is explained by using a specific embodiment of the door opening machine in an elevator scenario, and is not limited to the elevator field, and a door opening machine capable of opening doors in two directions can be used in other application fields, wherein the device and method for adjusting the tension of the steel wire rope are the same as the present application, and all belong to the protection scope of the present application.

According to an embodiment of the present application, the door opening machine 100 includes: the gantry crane comprises a gantry crane bottom plate 10, a steel wire rope 20 and a steel wire rope tensioning device 30. The gantry crane base plate 10 is provided with a plurality of first adjusting holes 101, and the steel wire rope 20 is sleeved on the steel wire rope tensioning device 30.

As shown in fig. 1, the steel wire rope 20 is sleeved on the steel wire rope tensioning device 30 to form a steel wire rope 20 which moves circularly, the steel wire rope 20 comprises an upper side and a lower side which are parallel to each other in the length direction of the bottom plate 10 of the gantry crane, a sliding plate assembly 40 is respectively installed on the upper side and the lower side of the steel wire rope 20, and a door body is installed on the sliding plate assembly 40. When the steel wire rope 20 moves clockwise, the steel wire rope 20 on the upper side drives the sliding plate assembly 40 to move towards the right side, the steel wire rope 20 on the lower side drives the sliding plate assembly 40 to move towards the left side, and when the steel wire rope 20 moves anticlockwise, the moving directions of the sliding plate assembly 40 are opposite, so that the door body is opened and closed.

The gantry crane base plate 10 is provided with one or more steel wire rope tensioning devices 30 capable of adjusting the tensioning force of the steel wire rope 20. Preferably, the wire rope tensioning device 30 is arranged at two ends of the bottom plate 10 of the gantry crane, so that the space can be saved, and other parts are not interfered.

The wire rope tensioner 30 includes: the base 31 is connected to the door machine base plate 10 and is suitable for rotating around a first axis, and the base 31 selectively cooperates with at least one of the first adjusting holes 101 to adjust the pressure exerted on the steel wire rope 20 by the tension wheel 32.

In order to increase the adjustment range of the steel wire rope tensioning device 30, a plurality of first adjustment holes 101 are formed in the gantry crane base plate 10 on which the steel wire rope tensioning device 30 is mounted, when the steel wire rope tensioning device 30 is mounted, the base 31 can be matched with one of the first adjustment holes 101, and when the steel wire rope tensioning device is matched with different first adjustment holes 101, the tensioning wheel 32 applies different pressures to the steel wire rope 20, so that the tensioning force of the steel wire rope 20 can be adjusted.

It should be clear that, since it is the base 31 that cooperates with the first adjustment hole 101 to effect the tension adjustment of the steel cable 20, in order to differentiate the effect of the interior of the steel cable tensioner 30 on the tension adjustment of the steel cable 20, the base 31 is limited to rotate about the first axis.

As shown in fig. 2, the end of the base 31 connected to the door chassis 10 may serve as a rotating shaft to rotate with a vertical line passing through the rotating shaft as a first axis, and during the rotation of the tension pulley 32 on the wire rope tensioning device 30 around the first axis, the tension pulley 32 gradually presses the wire rope 20 or gradually loosens away from the wire rope 20 to apply different pressures to the wire rope 20. In order to lock the rotatable state of the base 31, a plurality of first adjustment holes 101 are formed at the other end of the base 31 connected to the door base 10, and different pressing forces are applied to the wire rope 20 by the tension pulley 32 while the locking base 31 rotates by engaging with different first adjustment holes 101 through the base 31.

Because first regulation hole 101 sets up the certainty of position on door machine bottom plate 10, can make the regulation to wire rope 20 form the quantization and calculate, set up a plurality of first regulation holes 101 according to experience in door machine bottom plate 10 corresponding position, only need cooperate with different first regulation holes 101 when using, can use simple instrument or manual to wire rope 20 quantization adjustment, easy operation does not have the problem of interference.

The first adjusting hole 101 in the door machine bottom plate 10 can be produced in batches in an empirical mode, and is suitable for market demands, so that the door machine 100 has certain market competitiveness.

According to the door operator 100 of this application, through base 31 and the cooperation of first regulation hole 101, the position relation of adjustable base 31 and door machine bottom plate 10, and then make the take-up pulley 32 that sets up on base 31 exert different pressure to wire rope 20, adjust wire rope 20's tensile force, the distribution design of a plurality of first regulation holes 101 in different positions for the base plate tensile force can quantify when cooperating with first regulation hole 101, only need simply operate can realize adjusting.

According to one embodiment of the application, a first pivot shaft 33 is arranged on the gantry crane bottom plate 10, the base 31 is connected to the gantry crane bottom plate 10 through the first pivot shaft 33, the first axis is coincident with the axis of the first pivot shaft 33, and the base 31 is suitable for rotating around the axis of the first pivot shaft 33.

A first pivot shaft 33 is arranged at one end of the base 31 connected with the door machine bottom plate 10, the first pivot shaft 33 is used as a functional part for fixing the base 31 on the door machine bottom plate 10 and realizing the rotation of the base 31, and the base 31 rotates by taking the first pivot shaft 33 as an axis; at the other end of the base 31, which is connected to the door base 10, is engaged with the first adjustment hole 101, optionally with a fastener, so that the tension wheel 32 applies a different compressive force to the cable 20.

According to an embodiment of the application, one end of the base 31 is connected to the gantry crane bottom plate 10 through the first pivot shaft 33, the other end of the base is selectively matched with at least one of the first adjusting holes 101, and the first adjusting holes 101 are circumferentially arranged at intervals by taking the axis of the first pivot shaft 33 as a circle center and the distance from one end of the base to the other end of the base as a radius.

It is understood that the position of the first adjusting hole 101 may be set by taking the length of the two mounting points of the base 31 connected to the door base plate 10 as a reference, for example, as described above, the plurality of first adjusting holes 101 formed in the door base plate 10 may be arranged in an arc shape at intervals, and are formed by taking the axis of the first pivot shaft 33 as a center and taking the distance from one end of the base to the other end of the base as a radius.

For the steel wire rope tensioning device 30, the function of adjusting the tensioning force of the steel wire rope 20 is also provided, and the structure of the steel wire rope tensioning device 30 is optimized.

According to an embodiment of the present application, the cable tensioner 30 further comprises an adjusting lever 34, the adjusting lever 34 having the tension pulley 32 fixed thereto, the adjusting lever 34 being adapted to be rotatably arranged on the base 31 about a second axis and adapted to adjust the pressure exerted by the tension pulley 32 on the cable 20.

It should be noted that the second axis is different from the first axis, one end of the adjusting rod 34 connected to the base 31 can be used as a rotating shaft, and a vertical line passing through the rotating shaft is used as the second axis to rotate, the tensioning wheel 32 is fixed on the adjusting rod 34, and in the rotating process of the adjusting rod 34 around the second axis, the tensioning wheel 32 gradually presses the steel wire rope 20 or gradually loosens the steel wire rope 20 to apply different pressures to the steel wire rope 20.

Preferably, the first axis is parallel to the second axis. Such arrangement allows the rotation surface of the base 31 and the rotation surface of the adjustment lever 34 to be on the same horizontal plane, reducing the range of the three-dimensional space required for installing the wire rope tensioner 30.

According to an embodiment of the present application, a plurality of second adjustment holes 301 are formed in the base 31, and the adjustment rod 34 selectively engages with at least one of the plurality of second adjustment holes 301.

In order to lock the rotatable state of the adjustment lever 34, a plurality of second adjustment holes 301 are provided at the other end of the adjustment lever 34 connected to the base 31, and as shown in fig. 3, the adjustment lever 34 is engaged with different second adjustment holes 301, so that the tensioning sheave 32 applies different pressing forces to the wire rope 20 while the adjustment lever 34 is rotated.

Because the second adjusting holes 301 are arranged on the base 31 in a deterministic manner, the adjustment of the steel wire rope 20 can be quantitatively calculated, and the plurality of second adjusting holes 301 are arranged on the base 31 in corresponding positions according to experience, so that the steel wire rope can be quantitatively adjusted by using simple tools or manually only by matching with different second adjusting holes 301 when in use, and the steel wire rope can be quantitatively adjusted by using simple tools or manually, and the interference problem is avoided.

It should be clear that the primary and secondary adjustments can be determined as desired, as the adjustment of the tensioning force when the base 31 cooperates with the first adjustment aperture 101 and the adjustment of the tensioning force when the adjustment lever 34 cooperates with the second adjustment aperture 301 are complementary.

In one embodiment, the base 31 can be used in cooperation with the first adjusting hole 101 as a main adjustment, the adjusting range is wide, and the adjusting rod 34 can be used in cooperation with the second adjusting hole 301 as an auxiliary adjustment, the adjusting range is small, namely, the range is wide, the coarse adjustment is performed, and the range is narrow, the fine adjustment is performed.

According to an embodiment of the present application, a second pivot shaft 37 is provided on the base 31, the adjustment lever 34 is adapted to be rotatably disposed on the base 31 by the second pivot shaft 37, the second axis coincides with the axis of the second pivot shaft 37, and the adjustment lever 34 is adapted to rotate around the axis of the second pivot shaft 37.

A second pivot shaft 37 is arranged at one end of the adjusting rod 34 connected with the base 31, the second pivot shaft 37 is used as a functional part which not only fixes the adjusting rod 34 on the base 31, but also can realize the rotation of the adjusting rod 34, and the base 31 rotates by taking the second pivot shaft 37 as an axis; the other end of the adjusting rod 34 connected to the base 31 is engaged with the second adjusting hole 301, and optionally fixed by a fastener 35, so that the tension wheel 32 applies different pressing forces to the cable 20.

According to an embodiment of the present application, the adjustment lever 34 includes a first section 341 and a second section 342, the second section 342 is located inside the first section 341, the first section 341 and the second section 342 are in smooth transition, the tension wheel 32 is fixed on the first section 341, and the fastening member 35 matched with the second adjustment hole 301 is arranged on the second section 342.

Note that the "inner side" in the present application refers to a side close to the door machine base plate 10, and the "outer side" is opposite to the "inner side", that is, in the first segment 341 and the second segment 342, the second segment 342 is closer to the door machine base plate 10 than the first segment 341.

As shown in fig. 4, due to the structural problem of the portal crane base plate 10, the portal crane base plate 10 on the lower side protrudes outward, the size of the wire rope tensioning device 30 is smaller than the size of the installation position that the portal crane base plate 10 can provide, the plane of the portal crane base plate 10 is not enough to accommodate the wire rope tensioning device 30, the protruding position affects the wire rope tensioning device 30, therefore, the adjusting rod 34 is designed correspondingly, the protruding position also extends outward, and the first section 341 of the installation tensioning wheel 32 is outside the second section 342.

It should be noted that the adjustment rod 34 may extend in only one plane if the mounting plane of the gantry base plate 10 is sufficient to accommodate the cable tensioner 30.

According to one embodiment of the present application, the second section 342 is inside the first section 341, the first section 341 defines an escape space with the door base plate 10, and the tension pulley 32 is disposed in the escape space and fixed to the inside of the first section 341.

The space on the existing door operator 100 is limited, and in order to save space, the tensioning wheel 32 is arranged on the inner side of the first section 341, and the first section 341 can define an avoiding space relative to the second section 342 by being far away from the door operator base plate 10 and the door operator base plate 10, so that the tensioning wheel 32 is accommodated. Of course, in other door opening machine 100 or hall door applications, the tensioner 32 may be disposed outside if space is sufficient.

Since the second section 342 can be attached to the base 31 and the door base plate 10 more firmly, the second pivot shaft 37 and the second adjustment hole 301 are provided at positions corresponding to the second section 342.

As shown in fig. 3, the second adjustment hole 301 is located between the fixed position of the tension pulley 32 and the second pivot shaft 37, and the plurality of second adjustment holes 301 may be arranged at arc intervals around the second pivot shaft 37 and around the end point of the second pivot shaft 37 to the second segment 342.

It should be noted that the position of the second pivot 37 and the position of the second adjusting hole 301 can be changed, and the pressure of the tensioning wheel 32 on the cable 20 can also be changed.

According to an embodiment of the present application, the rope tensioning device 30 further includes a rope sheave 36, the rope 20 is sleeved on the rope sheave 36, and the rope sheave 36 and the tension pulley 32 are disposed in the same plane.

The wire sheave 36 may be integrated with the tension pulley 32 or may be provided separately. As shown in fig. 1, the steel rope tensioning device 30 includes 1 steel rope, the left side is a steel rope pulley 36 mounted on the bottom plate 10 of the gantry crane to support the steel rope 20, the right side is the steel rope tensioning device 30 mounted on the bottom plate 10 of the gantry crane, and the steel rope pulley 36 is integrated in the steel rope tensioning device 30.

As shown in fig. 2 and 3, the tension pulley 32 and the wire sheave 36 are designed to be integrated, so that the structure is compact and quantitative adjustment is convenient.

According to an embodiment of the present application, the tensioning sheave 32 and the wire sheave 36 are provided with rope grooves, which can be engaged with the wire rope 20.

The tension pulley 32 needs to apply a force to the wire rope 20 when pressing the wire rope 20 and the wire sheave 36 supporting the wire rope 20, and the tensioning pulley 32 and the wire sheave 36 are provided with rope grooves to limit the wire rope 20 and prevent the wire rope from coming off.

In fig. 4, the sheave 36 and the tension pulley 32 are arranged in the same plane, and it is essential that the rope 20 is not twisted when the rope groove of the tension pulley 32 and the rope groove of the sheave 36 act on the rope 20 at the same time, and the friction force of the wall surface of the rope groove of the tension pulley 32 or the wall surface of the rope groove of the sheave 36 against the rope 20 is reduced, so that the rope 20 is more easily rotated.

According to one embodiment of the application, the diameter of the tensioning wheel 32 is at least 8 times the diameter of the steel cord 20.

The diameter range of the tension sheave 32 of the wire rope tension device 30 is not limited, but preferably, the diameter of the tension sheave 32 is 8 times or more the diameter of the wire in consideration of the rope grooves of the tension sheave 32 and flexibility of rotation thereof.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims

1. A door opening machine, comprising:

the gantry crane comprises a gantry crane base plate, wherein a plurality of first adjusting holes are formed in the gantry crane base plate;

wire rope and wire rope overspeed device tensioner, the wire rope cover is established wire rope overspeed device tensioner is last, wire rope overspeed device tensioner includes: a base and a tensioning wheel, wherein the tensioning wheel is arranged on the base and is suitable for applying pressure to the steel wire rope,

the base is connected to the gantry crane bottom plate and is suitable for rotating around a first axis, and the base can be selectively matched with at least one of the first adjusting holes to adjust the pressure exerted on the steel wire rope by the tensioning wheel.

2. The door opener according to claim 1, wherein a first pivot shaft is arranged on the door machine bottom plate, the base is connected to the door machine bottom plate through the first pivot shaft, the first axis is coincident with the axis of the first pivot shaft, and the base is adapted to rotate around the axis of the first pivot shaft.

3. The door opener according to claim 2, wherein one end of the base is connected to the door machine base plate through the first pivot shaft, and the other end of the base is selectively engaged with at least one of the first adjusting holes,

the first adjusting holes are circumferentially arranged at intervals by taking the axis of the first pivot shaft as a circle center and taking the distance from one end of the base to the other end of the base as a radius.

4. The door opener of claim 1, wherein the wire rope tensioning device further comprises: the tensioning wheel is fixed on the adjusting rod, the adjusting rod is suitable for being rotatably arranged on the base around a second axis, and the adjusting rod is suitable for adjusting the pressure applied to the steel wire rope by the tensioning wheel.

5. The door opening machine of claim 4, wherein the first axis is parallel to the second axis.

6. The door opener according to claim 4, wherein the base defines a plurality of second adjustment holes, and the adjustment rod selectively engages at least one of the second adjustment holes.

7. The door opener according to claim 6, wherein a second pivot shaft is provided on the base, the adjusting lever is adapted to be rotatably placed on the base by the second pivot shaft, the second axis coincides with the axis of the second pivot shaft, and the adjusting lever is adapted to rotate around the axis of the second pivot shaft.

8. The door opener according to claim 7, wherein the adjusting lever comprises a first section and a second section, the second section is arranged on the inner side of the first section, the first section and the second section are in smooth transition, the tensioning wheel is fixed on the first section, and a fastening piece matched with the second adjusting hole is arranged on the second section.

9. The door operator according to claim 8, wherein said second section is inside said first section, said first section and said door operator base plate define an escape space, and said tension pulley is disposed in said escape space and fixed to the inside of said first section.

10. The door opener according to any one of claims 1 to 9, wherein the wire rope tensioning device further comprises a wire rope pulley, the wire rope is sleeved on the wire rope pulley, and the wire rope pulley and the tensioning wheel are arranged in the same plane.

11. Door opener according to any of claims 1-9, characterized in that the diameter of the tensioning wheel is at least 8 times the diameter of the wire rope.