CN217583073U - Banister speed reducer and banister - Google Patents

Abstract

The utility model relates to a floodgate machine technical field discloses a banister speed reducer and banister, the banister speed reducer includes the casing, the screw rod, nut component, main shaft and transmission arm group, the both ends of screw rod rotate with the casing respectively and are connected, nut component and screw rod threaded connection, the main shaft rotates and connects in the casing, transmission arm group link nut component and main shaft, rotate the screw rod, the axial motion of screw rod can be followed to nut component, it rotates to drive the main shaft with the drive transmission arm group, wherein, the casing is equipped with the spacing portion of first spacing portion and second, the spacing portion of first spacing portion and second is relative with nut component's both ends respectively, the spacing portion of first spacing portion and second is used for butt nut component respectively. Through the arrangement, the nut assembly is accurately limited, and therefore the rotation angle of the main shaft is accurately limited.

Description

Banister speed reducer and banister

Technical Field

The utility model relates to a floodgate machine technical field especially relates to a banister speed reducer and banister.

Background

In present banister speed reducer, the banister speed reducer includes screw rod, nut component, main shaft and transmission armset, and nut component and screw rod threaded connection, transmission armset connect nut component and main shaft, and the transmission armset is used for converting the linear motion of nut component into the rotary motion of main shaft. Wherein, for the restriction of realization to main shaft turned angle, set up the locating part respectively through two extreme positions on the motion stroke of transmission armset for when transmission armset moved to and with the locating part butt, main shaft stall.

However, the transmission arm sets are arranged in pairs, and when only one transmission arm set is limited, the two transmission arm sets are stressed unevenly, so that the synchronous transmission of the two transmission arm sets is easily influenced; when spacing two sets of transmission armsets simultaneously, then, be difficult to adjust the locating part to the position that can contact two sets of transmission armsets simultaneously.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a aim at providing a banister speed reducer and banister to it is difficult to carry out the technical problem of accurate restriction to the main shaft turned angle to solve the banister speed reducer.

On the one hand, the embodiment of the utility model provides a banister speed reducer, the banister speed reducer includes:

a housing;

the two ends of the screw rod are respectively and rotatably connected with the shell;

the nut component is in threaded connection with the screw rod;

the main shaft is rotatably connected to the shell, the transmission arm group is connected with the nut component and the main shaft, the screw rod is rotated, and the nut component can move along the axial direction of the screw rod so as to drive the transmission arm group to drive the main shaft to rotate; wherein the content of the first and second substances,

the shell is provided with a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are opposite to two ends of the nut assembly respectively, and the first limiting portion and the second limiting portion are used for being abutted to the nut assembly respectively.

In some embodiments, the first position-limiting part is opposite to one end of the nut component, and the first position-limiting part is provided with a first avoiding part;

the nut component comprises a nut, a support barrel and a screw, the nut is in threaded connection with the screw, the support barrel is sleeved with the nut, the screw is fixedly connected with the support barrel and the nut, a nut of the screw is opposite to the first avoiding portion, and the first avoiding portion is used for avoiding the nut of the screw.

In some embodiments, the first limiting portion includes a plurality of first protrusions, the plurality of first protrusions are arranged at intervals along the circumferential direction of the screw, and one first avoiding portion is arranged between every two adjacent first protrusions.

In some embodiments, the second limiting part is opposite to the other end of the nut component, and the second limiting part is provided with a second avoiding part;

the second avoidance part is positioned on the movement stroke of the transmission arm set and is used for avoiding the transmission arm set.

In some embodiments, the second limiting portion includes two second protrusions, the two second protrusions are arranged at intervals along the circumferential direction of the screw, and one second avoiding portion is arranged between adjacent sides of the two second protrusions.

In some embodiments, the second protrusion is fixed to an inner wall of the housing, an accommodating space is reserved between an end surface of the second protrusion opposite to the nut component and the inner wall of the housing opposite to the nut component, and the accommodating space is used for accommodating the transmission arm set when the nut component abuts against the second protrusion.

In some embodiments, the second limiting portion further comprises a reinforcing plate fixedly connecting the second protrusion and the inner side wall of the housing.

In some embodiments, the barrier gate reducer further comprises:

the two buffer parts are respectively arranged at two ends of the nut component, or the two buffer parts are respectively arranged at the first limiting part and the second limiting part and the end opposite to the nut component.

In some embodiments, the side wall of the shell is provided with a plurality of reinforcing ribs, and the plurality of reinforcing ribs are distributed at intervals.

On the other hand, the embodiment of the utility model provides a still provide a banister, the banister includes:

the barrier gate speed reducer as described above.

Compared with the prior art, the utility model discloses in the banister speed reducer of embodiment, through set up first spacing portion and the spacing portion of second respectively at the both ends of screw rod, along the axial motion stroke of screw rod with the restriction nut subassembly, the accurate spacing to the nut subassembly has been realized, thereby realized the accurate restriction to main shaft turned angle, and, first spacing portion and the spacing portion of second are relative with the both ends of nut subassembly respectively, the axial butt that nut subassembly can be followed respectively to first spacing portion and the spacing portion of second is at the both ends of nut subassembly, when the realization carries out accurate spacing to the nut subassembly, avoid first spacing portion and the spacing portion of second to produce radial butt effort to the nut subassembly, thereby avoid producing the influence to the cooperation precision of nut subassembly and screw rod, the cooperation precision of screw rod and nut subassembly has been guaranteed.

The utility model discloses the banister also has above-mentioned banister speed reducer advantage, no longer gives unnecessary details here.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Fig. 1 is a schematic structural view of a barrier gate speed reducer according to an embodiment of the present invention;

fig. 2 is an exploded view of a barrier gate reducer according to an embodiment of the present invention;

FIG. 3 is a first state of motion diagram of the barrier speed reducer shown in FIG. 1;

FIG. 4 is a partial enlarged view of a portion A of the barrier speed reducer shown in FIG. 3;

fig. 5 is a schematic structural view of a first housing of a housing of the barrier gate reducer shown in fig. 3;

FIG. 6 is a second state of motion diagram of the barrier speed reducer of FIG. 1;

fig. 7 is a schematic structural view of a second housing of the barrier speed reducer shown in fig. 6;

fig. 8 is a schematic structural diagram of a barrier gate speed reducer according to another embodiment of the present invention.

The reference numerals are shown in the following table:

road gate speed reducer	100	Shell body	10
				First shell	11	Second housing	12
Containing cavity	110	Accommodating space	120
				A first limit part	101	First bump	1011
Second limit part	102	Second bump	1021
				Reinforcing plate	1022	Reinforcing rib	103
First reinforcing rib	1031	Second reinforcing rib	1032
				First avoiding part	104	Second avoiding part	105
Screw rod	20	Nut component	30
				Nut	31	Flange	311
Support barrel	32	Screw nail	33
				Main shaft	40	Transmission arm set	50
Connecting arm	51	Crank arm	52
				Buffer piece	60	First bearing	70
Second bearing	80	Driving motor	90
				First axis of rotation	S1	Second rotation axis	S2

Detailed Description

To facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "connected" to another element, it can be directly on the other element or intervening elements may be present. The terms "upper", "lower", "left", "right", "upper", "lower", "top" and "bottom" used in this specification indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplified description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Please refer to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a barrier gate speed reducer 100 according to an embodiment of the present invention, fig. 2 is an exploded structural diagram of the barrier gate speed reducer 100 according to an embodiment of the present invention, the barrier gate speed reducer 100 includes a housing 10, a screw 20, a nut component 30, a main shaft 40 and a driving arm set 50, two ends of the screw 20 are respectively connected to the housing 10, the nut component 30 is connected to the screw 20 by a thread, the main shaft 40 is connected to the housing 10 by a rotation, the driving arm set 50 is connected to the nut component 30 and the main shaft 40, the screw 20 is rotated, the nut component 30 can move along an axial direction of the screw 20, so as to drive the driving arm set 50 to drive the main shaft 40 to rotate. The housing 10 is provided with a first limiting portion 101 and a second limiting portion 102, the first limiting portion 101 and the second limiting portion 102 are opposite to two ends of the nut assembly 30, and the first limiting portion 101 and the second limiting portion 102 are used for abutting against the nut assembly 30.

The utility model discloses in banister speed reducer 100 of embodiment, through setting up first spacing portion 101 and the spacing portion 102 of second respectively at the both ends of screw rod 20, with the axial motion stroke of limiting nut component 30 along screw rod 20, realized accurate spacing to nut component 30, make main shaft 40 at the rotation of predetermineeing the angle within range, thereby realized the accurate restriction to main shaft 40 turned angle, and, first spacing portion 101 and the spacing portion 102 of second are relative with nut component 30's both ends respectively, first spacing portion 101 and the spacing portion 102 of second can follow nut component 30's axial butt in nut component 30's both ends respectively, when realizing carrying out accurate spacing to nut component 30, avoid first spacing portion 101 and the spacing portion 102 of second to produce radial butt effort to nut component 30, thereby avoid producing the influence to nut component 30 and screw rod 20's cooperation precision, screw rod 20 and nut component 30's cooperation precision has been guaranteed.

In the barrier gate speed reducer 100 according to the embodiment of the present invention, the nut component 30 can reciprocate between the first limiting portion 101 and the second limiting portion 102 along the axial direction of the screw 20, and when the nut component 30 moves to abut against the first limiting portion 101, the first limiting portion 101 prevents the nut component 30 from continuing to move toward the first limiting portion 101, so that the main shaft 40 stops rotating; when the nut assembly 30 moves to abut against the second position-limiting portion 102, the second position-limiting portion 102 prevents the nut assembly 30 from moving toward the second position-limiting portion 102, so that the main shaft 40 stops rotating. Therefore, the rotation angle of the main shaft 40 is accurately limited within the preset angle range by accurately limiting the nut assembly 30, the movement stroke of the nut assembly 30 is determined by the distance between the first limiting portion 101 and the second limiting portion 102, and the movement stroke of the nut assembly 30 can determine the preset angle range of the rotation of the main shaft 40.

In some embodiments, the main shaft 40 is rotated by a predetermined angle in a range of 0 ° to 90 °, so that the lever connected to the main shaft 40 is also rotated in a range of 0 ° to 90 °, and is in the down position when the lever is rotated to 0 ° and is in the up position when the lever is rotated to 90 °.

In other embodiments, the preset angle range may also be set according to practical requirements, and is not limited to the above-mentioned range of 0 ° to 90 °, for example, the preset angle range is 0 ° to 180 °.

In some embodiments, the housing 10 includes a first housing 11 and a second housing 12, the first housing 11 and the second housing 12 are fixed, the first housing 11 and the second housing 12 surround to form a receiving cavity 110, and the screw 20, the nut component 30, the main shaft 40, and the driving arm assembly 50 are all received in the receiving cavity 110, wherein two ends of the main shaft 40 extend out of the receiving cavity 110 so as to be connected to the stop lever. Through the arrangement, a relatively closed space can be provided for the screw rod 20, the nut component 30, the main shaft 40 and the transmission arm group 50, so that various components in the shell 10 are protected, and dust, impurities and the like are prevented from influencing the movement fit among the various components.

The first limiting portion 101 and the second limiting portion 102 are respectively disposed on the opposite inner walls of the first housing 11 and the second housing 12.

In some embodiments, the side wall of the housing 10 is provided with a plurality of ribs 103, the plurality of ribs 103 are distributed at intervals, and the ribs 103 are used for increasing the strength and rigidity of the housing 10, thereby allowing the thickness of the housing 10 to be thinned to some extent, maintaining the structural performance of the housing 10, and reducing the weight of the housing 10.

Specifically, in some embodiments, the first housing 11 is provided with a plurality of first reinforcing ribs 1031, the plurality of first reinforcing ribs 1031 are distributed at intervals, the second housing 12 is provided with a plurality of second reinforcing ribs 1032, the plurality of second reinforcing ribs 1032 are distributed at intervals, and the first reinforcing ribs 1031 and the second reinforcing ribs 1032 correspond to each other one by one and are connected at the parting plane of the first housing 11 and the second housing 12, so as to form each of the reinforcing ribs 103.

Wherein, different ribs 103 can be disposed on the outer or inner side wall of the housing 10 as required.

In some embodiments, the driving arm set 50 includes a connecting arm 51 and a crank arm 52, one end of the connecting arm 51 is rotatably connected to the nut assembly 30, the other end of the connecting arm 51 is rotatably connected to one end of the crank arm 52, and the other end of the crank arm 52 is fixedly connected to the main shaft 40.

Specifically, the axis of the screw 20 and the axis of the main shaft 40 are perpendicular to each other and located on different planes, the relative positions of the axis of the screw 20 and the axis of the main shaft 40 are fixed, and the screw 20 and the main shaft 40 can only rotate around the respective axes. The nut assembly 30, the connecting arm 51, the crank arm 52 and the spindle 40 are connected to form an offset slider-crank mechanism, and the nut assembly 30 drives the spindle 40 to move through the connecting arm 51 and the crank arm 52, so that the linear motion is converted into the rotary motion.

By rotating the screw 20, the nut component 30 can move along the axial direction of the screw 20, and at the same time, the nut component 30 drives the connecting arm 51 to move, one end of the connecting arm 51 rotates around the first rotating axis S1 of the connecting arm 51 and the nut component 30, the other end of the connecting arm 51 rotates around the second rotating axis S2 of the connecting arm 51 and the crank arm 52 and drives the crank arm 52 to move, one end of the crank arm 52 rotates around the second rotating axis S2 of the crank arm 52 and the connecting arm 51, and the other end of the crank arm 52 rotates around the axis of the main shaft 40 and drives the main shaft 40 to rotate. The first rotation axis S1 is a center line of a rotational connection between one end of the connecting arm 51 and the nut assembly 30, and the second rotation axis S2 is a center line of a rotational connection between the other end of the connecting arm 51 and the crank arm 52.

In some embodiments, the number of the connecting arms 51 and the connecting levers 52 is two, one end of each of the two connecting arms 51 is rotatably connected to both sides of the nut assembly 30, the other end of each of the two connecting arms 51 is rotatably connected to one end of each of the two connecting levers 52, the other ends of the two connecting levers 52 are fixedly connected to the main shaft 40, and the two connecting levers 52 are located between the two connecting arms 51. Through the arrangement, on one hand, the two connecting arms 51 are respectively and rotatably connected to the two sides of the nut component 30, so that the nut component 30 can be uniformly subjected to the pulling force of the two connecting arms 51, and the phenomenon that the nut component 30 is biased relative to the screw rod 20 due to the concentrated stress on one side of the nut component 30 is avoided; on the other hand, the space between the two connecting arms 51 is utilized, and the two crank arms 52 are arranged between the two connecting arms 51, so that the distance between the two crank arms 52 is reduced, and the structure of the barrier gate speed reducer 100 is compact.

Referring to fig. 3, fig. 3 is a first movement state diagram of the barrier gate speed reducer 100 shown in fig. 1, it can be understood that, since the parts of the nut assembly 30 are fixedly connected by screws, and nuts of the screws are exposed at an end surface of the nut assembly 30, when the nut assembly 30 moves to a position abutting against the first limiting portion 101, the nuts of the screws 33 are located at the first limiting portion 101, and if the nuts of the screws frequently collide with the first limiting portion 101, the screws are easily loosened, so, please refer to fig. 4 and fig. 5, fig. 4 is a partial enlarged view of a portion a of the barrier gate speed reducer 100 shown in fig. 3, fig. 5 is a structural schematic diagram of the first housing 11 of the housing 10 of the barrier gate speed reducer 100 shown in fig. 3, and in some embodiments, the first limiting portion 101 is opposite to one end of the nut assembly 30, and the first limiting portion 101 is provided with a first avoiding portion 104. The nut component 30 comprises a nut 31, a support barrel 32 and a screw 33, the nut 31 is in threaded connection with the screw 20, the nut 31 is sleeved on the support barrel 32, the screw 33 is fixedly connected with the support barrel 32 and the nut 31, the nut of the screw 33 is opposite to the first avoiding portion 104, the first avoiding portion 104 is used for avoiding the nut of the screw 33, when the nut 31 or the support barrel 32 is allowed to abut against the first limiting portion 101, the nut of the screw 33 can be inserted into the first avoiding portion 104, the nut of the screw 33 is enabled to be staggered with the first limiting portion 101, the nut of the screw 33 is prevented from abutting against the first limiting portion 101 directly, the situation that the screw 33 is loosened under the effect of external force abutting is avoided frequently, accurate limiting of the nut component 30 is achieved, and meanwhile the first limiting portion 101 is prevented from influencing tightness of connection among parts of the nut component 30.

One of the first avoidance portions 104 corresponds to a nut of one of the screws 33.

As shown in fig. 2, in some embodiments, one end of the nut 31 is provided with a flange 311, the bracket barrel 32 is sleeved on the other end of the nut 31 and abuts against the flange 311, and the screw 33 sequentially penetrates through the flange 311 and the bracket barrel 32 and is in threaded connection with the flange 311 and the bracket barrel 32, so that the bracket barrel 32 is fixed to the nut 31. The flange 311 is opposite to the first limiting portion 101, the nut of the screw 33 is exposed on the end surface of the flange 311, and the nut of the screw 33 is opposite to the first avoiding portion 104.

In some other embodiments, the flange 311 may be omitted, the nut assembly 30 further includes a pressing plate, the nut 31 is sleeved with the holder cylinder 32, one end of the holder cylinder 32 is provided with an abutting portion, the abutting portion is used for abutting against the other end of the nut 31, the pressing plate is provided at the other end of the holder cylinder 32, the pressing plate is used for abutting against one end of the nut 31, and the screw 33 sequentially penetrates through the pressing plate and the other end of the holder cylinder 32 and is in threaded connection with the pressing plate and the holder cylinder 32, so that the holder cylinder 32 is fixed to the nut 31. The pressing plate is opposite to the first limiting portion 101, the nut of the screw 33 is exposed on the end face of the pressing plate, and the nut of the screw 33 is opposite to the first avoiding portion 104.

In other embodiments, the flange 311 or the pressure plate of the above embodiments is provided with a counter bore, and the nut of the screw 33 is received in the counter bore, so that the nut of the screw 33 is prevented from abutting against the first limiting portion 101, and therefore, the first avoiding portion 104 can be omitted.

As shown in fig. 4, in some embodiments, the first position-limiting portion 101 includes a plurality of first protrusions 1011, the plurality of first protrusions 1011 are disposed at intervals along the circumferential direction of the screw 20, and a first avoiding portion 104 is disposed between every two adjacent first protrusions 1011. Through the above arrangement, when the nut component 30 abuts against the first limiting portion 101, the nut component 30 can receive relatively uniform abutting external force, the situation that the nut component 30 is concentrated in a certain position and stressed and is offset relative to the screw rod 20 is avoided, meanwhile, the contact area of the first limiting portion 101 and the nut component 30 is ensured, and the nut component 30 can be stably stopped at the first limiting portion 101.

In a specific implementation process, the structural shapes of the first protrusions 1011 may be the same or different, and only the first protrusions 1011 need to be arranged at intervals along the circumferential direction of the screw 20.

Referring to fig. 6, fig. 6 is a second movement state diagram of the barrier gate reducer 100 shown in fig. 1, it can be understood that when the nut assembly 30 moves to a position abutting against the second limiting portion 102, the transmission arm assembly 50 is located at the second limiting portion 102, and movement interference occurs between the transmission arm assembly 50 and the second limiting portion 102, so, referring to fig. 7, fig. 7 is a schematic structural diagram of the second housing 12 of the barrier gate reducer 100 shown in fig. 6, in some embodiments, the second limiting portion 102 is opposite to the other end of the nut assembly 30, and the second limiting portion 102 is provided with a second avoiding portion 105. The second avoiding portion 105 is located on a movement stroke of the transmission arm set 50, and the second avoiding portion 105 is used for avoiding the transmission arm set 50 so as to avoid the transmission arm set 50 from moving and interfering with the second avoiding portion 105 in the movement process.

One of the second avoidance portions 105 corresponds to one of the transmission arm groups 50.

In some embodiments, the second limiting portion 102 includes two second protrusions 1021, the two second protrusions 1021 are spaced apart along the circumference of the screw 20, and a second avoiding portion 105 is disposed between adjacent sides of the two second protrusions 1021. Through the above arrangement, when the nut component 30 abuts against the second limiting portion 102, the nut component 30 can be subjected to relatively uniform abutting external force, the situation that the nut component 30 is concentrated in a certain position and stressed and is biased relative to the screw 20 is avoided, meanwhile, the contact area of the second limiting portion 102 and the nut component 30 is ensured, and the nut component 30 can be stably stopped at the second limiting portion 102.

In some embodiments, the second protrusion 1021 is fixed on the inner wall of the casing 10, and an accommodating space 120 is reserved between an end surface of the second protrusion 1021 opposite to the nut component 30 and the inner wall of the casing 10 opposite to the nut component 30, the accommodating space 120 is used for accommodating the driving arm assembly 30 when the nut component 30 and the second protrusion 1021 are abutted, and the driving arm assembly 30 can swing in the accommodating space 120 to avoid the movement interference with the inner wall of the casing 10 when the driving arm assembly 50 swings towards the inner wall of the casing 10.

In some embodiments, the second protrusion 1021 extends a preset length towards the first position-limiting part 101, so that a sufficient accommodating space 120 is reserved between an end surface of the second protrusion 1021 opposite to the nut component 30 and an inner wall of the casing 10 opposite to the nut component 30, so as to allow the driving arm assembly 50 to swing. The preset length can be set according to actual needs, and when the nut component 30 abuts against the second protrusion 1021, the transmission arm set 50 does not interfere with the inner wall of the housing 10.

It can be understood that, since the receiving space 120 needs to be reserved for the transmission arm assembly 50, the second protrusion 1021 is generally long, and the second protrusion 1021 needs to frequently abut against the nut assembly 30, and is easily deformed under an external force, in some embodiments, the second limiting portion 102 further includes a reinforcing plate 1022, the reinforcing plate 1022 fixedly connects the second protrusion 1021 and the inner side wall of the housing 10, and the reinforcing plate 1022 is used for increasing the structural strength of the second protrusion 1021 to prevent the second protrusion 1021 from being deformed in frequent collision with the nut assembly 30.

Each second protrusion 1021 corresponds to at least one stiffener 1022.

As shown in fig. 3, in the barrier gate speed reducer 100 according to the embodiment of the present invention, when the nut component 30 abuts against the first limiting portion 101, the whole transmission arm set 50 is located at one side of the first limiting portion 101 close to the second limiting portion 102, no motion interference occurs between the transmission arm set 50 and the first limiting portion 101, the nut of the screw 33 is located at the first limiting portion 101, and the collision between the nut of the screw 33 and the first limiting portion 101 may cause the screw 33 to loosen, so that the first limiting portion 101 only needs to be provided with the first avoiding portion 104 for avoiding the nut of the screw 33; as shown in fig. 6, when the nut component 30 abuts against the second limiting portion 102, the nut of the screw 33 is located on one side of the second limiting portion 102 close to the first limiting portion 101, the nut of the screw 33 does not collide with the second limiting portion 102, the part of the transmission arm assembly 50 is located at the second limiting portion 102, and the transmission arm assembly 50 and the second limiting portion 102 may generate motion interference, so the second limiting portion 102 only needs to be provided with a second avoiding portion 105 for avoiding the transmission arm assembly 50.

It is understood that, in some other embodiments, if the nut component 30 abuts against the first position-limiting portion 101 and the transmission arm assembly 50 is located at the first position-limiting portion 101, and motion interference occurs between the transmission arm assembly 50 and the first position-limiting portion 101, the first position-limiting portion 101 may be provided with a second avoiding portion 105 for avoiding the transmission arm assembly 50; if the nut assembly 30 abuts against the second position-limiting portion 102 and the nut of the screw 33 is located at the second position-limiting portion 102, the screw 33 may be loosened due to collision between the nut of the screw 33 and the second position-limiting portion 102, and the second position-limiting portion 102 may be provided with a first escape portion 104 for escaping the nut of the screw 33.

Please refer to fig. 8, fig. 8 is a schematic structural diagram of a barrier gate speed reducer 100 according to another embodiment of the present invention, in some embodiments, the barrier gate speed reducer 100 further includes two buffering members 60, the two buffering members 60 are respectively disposed at two ends of the nut component 30, or the two buffering members 60 are respectively disposed at one ends of the first limiting portion 101 and the second limiting portion 102 opposite to the nut component 30, the buffering members 60 are configured to buffer the nut component 30, prevent the nut component 30 from being in hard abutment with the first limiting portion 101 and the second limiting portion 102 respectively, prevent the nut component 30 from frequently colliding with the first limiting portion 101 and the second limiting portion 102 respectively, and prevent the connection between the parts of the nut component 30 from being loosened, thereby ensuring the matching accuracy of the nut component 30 and the screw 20.

Referring to fig. 2 again, in some embodiments, the barrier gate reducer 100 further includes two first bearings 70, the two first bearings 70 are respectively mounted on the housing 10, two ends of the screw 20 are respectively mounted on the two first bearings 70, and the first bearings 70 are used for supporting the screw 20, so as to prevent the screw 20 from directly contacting the housing 10, reduce the friction force generated when the screw 20 rotates, and ensure the rotation precision thereof.

Wherein the two first bearings 70 are respectively mounted to the first housing 11 and the second housing 12.

In some embodiments, the barrier speed reducer 100 further comprises two second bearings 80. The two second bearings 80 are respectively sleeved on the outer side wall of the main shaft 40 and respectively mounted on the shell 10, the second bearings 80 are used for supporting the main shaft 40, the main shaft 40 is prevented from directly contacting the shell 10, friction force generated when the main shaft 40 rotates is reduced, and rotation precision of the main shaft is guaranteed.

Wherein the two second bearings 80 are sandwiched between the first housing 11 and the second housing 12.

In some embodiments, the barrier speed reducer 100 further comprises a driving motor 90, an output end of the driving motor 90 is connected to one end of the screw 20, and the driving motor 90 is used for driving the screw 20 to rotate around its own axis.

The embodiment of the utility model provides a still provide a banister, banister include the shelves pole and as above banister speed reducer 100, the shelves pole is connected with banister speed reducer 100's main shaft 40, banister speed reducer 100 is used for driving the shelves pole and is done the pole-raising or the action of falling the pole to realize the banister to the management and control of access & exit, road etc.

In this embodiment, the barrier also has the advantages of the barrier reducer 100, and will not be described herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims (10)

1. The utility model provides a banister speed reducer which characterized in that includes:

a housing;

the two ends of the screw rod are respectively and rotatably connected with the shell;

the nut component is in threaded connection with the screw rod;

the main shaft is rotatably connected to the shell, the transmission arm group is connected with the nut component and the main shaft, the screw rod is rotated, and the nut component can move along the axial direction of the screw rod so as to drive the transmission arm group to drive the main shaft to rotate; wherein, the first and the second end of the pipe are connected with each other,

the shell is provided with a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are opposite to two ends of the nut component respectively, and the first limiting portion and the second limiting portion are used for being abutted to the nut component respectively.

2. The barrier gate speed reducer according to claim 1, wherein the first limiting portion is opposite to one end of the nut component, and the first limiting portion is provided with a first avoidance portion;

the nut component comprises a nut, a support barrel and a screw, the nut is in threaded connection with the screw, the support barrel is sleeved with the nut, the screw is fixedly connected with the support barrel and the nut, a nut of the screw is opposite to the first avoiding portion, and the first avoiding portion is used for avoiding the nut of the screw.

3. The barrier gate speed reducer according to claim 2, wherein the first limiting portion includes a plurality of first protrusions, the plurality of first protrusions are arranged at intervals in the circumferential direction of the screw, and one first avoidance portion is arranged between every two adjacent first protrusions.

4. The barrier gate speed reducer according to claim 1, wherein the second limiting portion is opposite to the other end of the nut assembly, and a second avoiding portion is arranged on the second limiting portion;

the second avoidance part is located on the movement stroke of the transmission arm set, and the second avoidance part is used for avoiding the transmission arm set.

5. The barrier gate speed reducer according to claim 4, wherein the second limiting portion includes two second protrusions, the two second protrusions are arranged at intervals along a circumferential direction of the screw, and one second avoiding portion is arranged between adjacent sides of the two second protrusions.

6. The barrier gate speed reducer according to claim 5, wherein the second protrusion is fixed to an inner wall of the housing, an accommodation space is reserved between an end surface of the second protrusion opposite to the nut component and the inner wall of the housing opposite to the nut component, and the accommodation space is used for accommodating the transmission arm set when the nut component abuts against the second protrusion.

7. The barrier gate reducer according to claim 6, wherein the second limiting portion further comprises a reinforcing plate, and the reinforcing plate is fixedly connected with the second protrusion and an inner side wall of the housing.

8. The barrier gate reducer according to any one of claims 1 to 7, further comprising:

the two buffer parts are respectively arranged at two ends of the nut component, or the two buffer parts are respectively arranged at the first limiting part and the second limiting part and the end opposite to the nut component.

9. The barrier gate reducer according to claim 1, wherein a plurality of reinforcing ribs are provided on a side wall of the housing, and the plurality of reinforcing ribs are spaced apart from each other.

10. A barrier gate, comprising:

the barrier gate reducer according to any one of claims 1 to 9.

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