CN213360977U

CN213360977U - Synchronous belt assembly

Info

Publication number: CN213360977U
Application number: CN202022150560.9U
Authority: CN
Inventors: 代国龙; 王佳威; 黄建威; 周家裕; 陈瑜若
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-06-04
Anticipated expiration: 2030-09-25

Abstract

The utility model provides a hold-in range subassembly. The synchronous belt subassembly includes: the first synchronous belt wheel is in driving connection with the driving device, and the outer peripheral surface of the first synchronous belt wheel is provided with a first tooth-shaped part; a second synchronous pulley having a second toothed portion on an outer peripheral surface thereof; the synchronous belt is sleeved on the first synchronous belt wheel and the second synchronous belt wheel, and the inner circumferential surface of the synchronous belt is provided with a third tooth-shaped part meshed with the first tooth-shaped part and the second tooth-shaped part; the ratchet mechanism comprises a ratchet wheel and a pawl, and part of the pawl extends into a tooth groove of the ratchet wheel and is matched with the tooth groove; the ratchet wheel is fixedly connected with the second synchronous belt wheel; the second synchronous belt wheel is used for tensioning the synchronous belt; the tooth following direction of the ratchet mechanism is consistent with the first direction. The utility model discloses the problem of the easy pine of synchronous belt subassembly in long-term use among the prior art has been solved effectively.

Description

Synchronous belt assembly

Technical Field

The utility model relates to a drive mechanism technical field particularly, relates to a hold-in range subassembly.

Background

At present, the synchronous belt component has the characteristics of low cost, strong plasticity and the like, so that the synchronous belt component is more generally applied to mechanical arms.

However, in the long-term use process of the synchronous belt component, the phenomenon that the synchronous belt becomes loose exists, the normal use of the synchronous belt is influenced, and certain potential safety hazards also exist.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a hold-in range subassembly to solve among the prior art hold-in range subassembly yielding problem loose in long-term use.

In order to achieve the above object, the utility model provides a hold-in range subassembly, include: the first synchronous belt wheel is in driving connection with the driving device, and the outer peripheral surface of the first synchronous belt wheel is provided with a first tooth-shaped part; a second synchronous pulley having a second toothed portion on an outer peripheral surface thereof; the synchronous belt is sleeved on the first synchronous belt wheel and the second synchronous belt wheel, and the inner circumferential surface of the synchronous belt is provided with a third tooth-shaped part meshed with the first tooth-shaped part and the second tooth-shaped part; the ratchet mechanism comprises a ratchet wheel and a pawl, and part of the pawl extends into a tooth groove of the ratchet wheel and is matched with the tooth groove; the ratchet wheel is fixedly connected with the second synchronous belt wheel; the second synchronous belt wheel is used for tensioning the synchronous belt; the tooth following direction of the ratchet mechanism is consistent with the first direction.

Further, the synchronous belt assembly further comprises: a base body; the first connecting shaft penetrates through the seat body and is rotatably connected with the seat body, and the second synchronous belt wheel and the ratchet wheel are fixedly connected with the first connecting shaft; the first connecting shaft is rotated along the first direction, so that the first connecting shaft drives the ratchet wheel and the second synchronous belt wheel to synchronously rotate.

Further, the pawl rotationally sets up on the pedestal, and the hold-in range subassembly still includes: and the elastic structure is arranged on the seat body and is connected with the pawl so as to apply elastic force moving towards one side of the ratchet wheel to the pawl.

Furthermore, the elastic structure is a spring, a first end of the spring is connected with the seat body, and a second end of the spring is connected with the pawl.

Further, the pawl includes: the second connecting shaft penetrates through the seat body and is rotatably connected with the seat body; the first extending part is arranged on the second connecting shaft and extends along the radial direction of the second connecting shaft, and the end part of the first extending part, which is far away from the second connecting shaft, extends into the tooth groove of the ratchet wheel and is matched with the tooth groove.

Further, the pawl further includes: the first extension part and the second extension part are arranged at intervals along the circumferential direction of the second connecting shaft; the second extending part is rotated along the second direction, so that the first extending part is disengaged from the ratchet wheel, and the synchronous belt is in a relaxed state; the first direction is opposite to the second direction.

Further, the ratchet wheel is arranged coaxially with the first connecting shaft, and the second synchronous pulley is arranged coaxially with the first connecting shaft.

Further, the synchronous belt assembly further comprises: the abutting structure is arranged on the seat body; wherein the abutting structure has an abutting state and a releasing state; when the abutting structure is in an abutting state, the abutting structure is pressed on the synchronous belt; when the abutment structure is in the released state, the abutment structure is separated from the timing belt.

Further, the pedestal is the U-shaped structure, and the butt structure includes: at least one mounting part is arranged on a first side edge of the U-shaped structure, at least one mounting part is arranged on a second side edge of the U-shaped structure, and at least two mounting parts are oppositely arranged; each mounting part is provided with a mounting groove; and two ends of the butt joint shaft respectively extend into the two mounting grooves.

Furthermore, the mounting groove comprises a first groove section and a second groove section which are connected in sequence, and the first groove section and the second groove section are arranged at an included angle; the extending direction of the second groove section is along the height direction of the seat body.

Furthermore, the abutting shaft comprises a first shaft section, a second shaft section and a third shaft section which are sequentially connected, the first shaft section extends into one mounting groove and can slide along the mounting groove, the third shaft section extends into the other mounting groove and can slide along the mounting groove, and the outer surface of the second shaft section can be attached to the synchronous belt; when the first shaft section and/or the second shaft section slide into the second groove section along the first groove section, the abutting structure is switched from the releasing state to the abutting state.

Use the technical scheme of the utility model, second synchronous pulley is for following the driving wheel, waits to convey the piece and installs on the synchronous belt. When one side of treating the transmission piece of hold-in range installation is in the lax state, the staff operates the ratchet, so that the ratchet rotates along first direction, because ratchet and second synchronous pulley fixed connection, then the ratchet can drive second synchronous pulley and rotate along first direction, for example first direction is anticlockwise, in order to carry out the tensioning through second synchronous pulley to one side of treating the transmission piece of hold-in range installation, and then the problem that the hold-in range subassembly is easy to become loose in long-term use among the prior art has been solved, transmission assembly's transmission reliability has been promoted. Wherein, ratchet mechanism's the same direction of following the tooth direction with first direction to ensure that the ratchet can rotate along first direction for the pawl, promoted ratchet mechanism to the tensioning reliability of hold-in range. Meanwhile, if the ratchet wheel rotates along a second direction opposite to the first direction, the pawl can abut against the tooth groove to prevent the ratchet wheel from rotating along the second direction, so that the loosening effect is achieved, and the second synchronous pulley can be prevented from rotating along the second direction to cause the loosening of the synchronous belt.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a partial perspective view of an embodiment of a timing belt assembly according to the present invention;

FIG. 2 illustrates a front view of the timing belt assembly of FIG. 1;

FIG. 3 illustrates a top view of the timing belt assembly of FIG. 1;

FIG. 4 illustrates a side view of the timing belt assembly of FIG. 1;

figure 5 shows a partial front view of the timing belt assembly of figure 2;

FIG. 6 illustrates a partial top view of the timing belt assembly of FIG. 3; and

figure 7 shows a schematic perspective view of the mounting portion of the timing belt assembly of figure 1.

Wherein the figures include the following reference numerals:

10. a base body; 20. a first connecting shaft; 30. a second timing pulley; 40. a synchronous belt; 50. a ratchet wheel; 51. a tooth socket; 60. a pawl; 61. a second connecting shaft; 62. a first extension portion; 63. a second extension portion; 70. an elastic structure; 80. an abutting structure; 81. an installation part; 811. mounting grooves; 8111. a first groove section; 8112. a second groove section; 82. a butt joint shaft; 821. a first shaft section; 822. a second shaft section; 823. a third shaft section; 90. a limiting block; 100. a member to be conveyed.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, 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 application belongs.

In the present invention, unless otherwise specified, the use of directional words such as "upper and lower" is generally in reference to the orientation shown in the drawings, or to the vertical, perpendicular or gravitational orientation; likewise, for ease of understanding and description, "left and right" are generally to the left and right as shown in the drawings; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself, but the above directional terms are not intended to limit the present invention.

In order to solve the problem that the synchronous belt component is easy to loosen in the long-term use process in the prior art, the application provides the synchronous belt component.

As shown in fig. 1 to 6, the timing belt assembly includes a first timing pulley, a second timing pulley 30, a timing belt 40, and a ratchet mechanism. The first synchronous belt wheel is in driving connection with the driving device, and the outer peripheral surface of the first synchronous belt wheel is provided with a first tooth-shaped part. The outer peripheral surface of the second synchronous pulley 30 has a second toothed portion. The timing belt 40 is fitted over the first and second timing pulleys 30, and the inner peripheral surface of the timing belt 40 has a third tooth portion engaged with the first and second tooth portions. The ratchet mechanism comprises a ratchet wheel 50 and a pawl 60, wherein part of the pawl 60 extends into a tooth slot 51 of the ratchet wheel 50 and is matched with the tooth slot 51. The ratchet 50 is fixedly connected to the second synchronous pulley 30. Wherein the second synchronous pulley 30 tensions the synchronous belt 40 by rotating the ratchet 50 in the first direction so that the ratchet 50 rotates the second synchronous pulley 30. The tooth following direction of the ratchet mechanism is consistent with the first direction.

By applying the technical solution of the present embodiment, the second synchronous pulley 30 is a driven pulley, and the member to be conveyed 100 is installed on the synchronous belt 40. When one side of waiting to send piece 100 of hold-in range 40 installation is in the lax state, the staff operates ratchet 50, so that ratchet 50 rotates along first direction, because ratchet 50 and second synchronous pulley 30 fixed connection, then ratchet 50 can drive second synchronous pulley 30 and rotate along first direction, for example first direction is anticlockwise, in order to carry out the tensioning to one side of waiting to send piece 100 of hold-in range 40 installation through second synchronous pulley 30, and then solved the problem that the hold-in range subassembly is easy to become loose in long-term use among the prior art, transmission assembly's transmission reliability has been promoted. Wherein the tooth following direction of the ratchet mechanism is consistent with the first direction, so as to ensure that the ratchet 50 can rotate along the first direction relative to the pawl 60, thereby improving the tension reliability of the ratchet mechanism on the synchronous belt 40. Meanwhile, if the ratchet 50 rotates in a second direction opposite to the first direction, the pawl 60 abuts against the tooth groove 51 to prevent the ratchet 50 from rotating in the second direction, thereby playing a loosening role, and preventing the second synchronous pulley 30 from rotating in the second direction to cause the slack of the synchronous belt 40.

In the present embodiment, the third tooth portion of the timing belt 40 is always engaged with the first tooth portion and the second tooth portion, so as to ensure that the timing belt 40 can run synchronously when the second timing pulley 30 rotates, thereby realizing the tensioning action of the timing belt 40.

As shown in fig. 1 to 6, the timing belt assembly further includes a housing 10 and a first connecting shaft 20. The first connecting shaft 20 is disposed through the seat body 10 and rotatably connected to the seat body 10, and the second synchronous pulley 30 and the ratchet 50 are both fixedly connected to the first connecting shaft 20. Wherein the first connecting shaft 20 rotates the ratchet 50 and the second synchronous pulley 30 synchronously by rotating the first connecting shaft 20 in the first direction. Thus, when the worker needs to tension the synchronous belt 40, the ratchet 50 and the second synchronous pulley 30 can be driven to rotate by operating the first connecting shaft 20, and the operation difficulty of the worker is reduced. Meanwhile, the arrangement improves the structural stability of the transmission assembly, and the structure of the transmission assembly is more compact.

Specifically, the seat body 10 has a mounting cavity and a via hole communicated with the mounting cavity, the via hole is used for the first connecting shaft 20 to pass through, the first synchronous pulley and the second synchronous pulley 30 are both located in the mounting cavity, and the ratchet mechanism is located outside the mounting cavity. The first end of the first connecting shaft 20 is located in the mounting cavity and is fixedly connected with the second synchronous pulley 30, and the second end of the first connecting shaft 20 is located outside the mounting cavity and is fixedly connected with the ratchet 50. Wherein, the end of the second end of the first connecting shaft 20 has a mounting groove for the socket head wrench to extend into. Like this, when the staff need be to the tensioning to hold-in range 40, the staff stretch into the mounting groove with the allen key in and with the spacing backstop of mounting groove, rotate the allen key along first direction to drive first connecting axle 20, ratchet 50 and second synchronous pulley 30 and rotate, in order to take up hold-in range 40.

As shown in fig. 1, 2, 4 and 5, the pawl 60 is rotatably disposed on the housing 10, and the timing belt assembly further includes an elastic structure 70. Wherein, an elastic structure 70 is provided on the housing 10 and connected with the pawl 60 for applying an elastic force to the pawl 60 moving toward one side of the ratchet 50. Thus, the above arrangement of the elastic structure 70 ensures that the pawl 60 can always contact the tooth groove 51, further improving the loosening effect of the ratchet mechanism.

In this embodiment, the elastic structure 70 is a spring, a first end of the spring is connected to the seat 10, and a second end of the spring is connected to the pawl 60. Thus, the elastic structure 70 is simpler in structure, easy to process and implement, and the processing cost of the elastic structure 70 is reduced.

Specifically, the first end of the spring is provided with a first hook which is hooked on the seat body 10, the second end of the spring is provided with a second hook which is hooked on the pawl 60, so that the spring, the seat body 10 and the pawl 60 can be assembled and disassembled more easily and conveniently, and the assembling and disassembling difficulty is reduced. Meanwhile, the spring is easier and simpler to replace.

As shown in fig. 5, the pawl 60 includes a second connecting shaft 61 and a first extending portion 62. The second connecting shaft 61 is inserted through the seat body 10 and rotatably connected to the seat body 10. The first extending portion 62 is disposed on the second connecting shaft 61 and extends along the radial direction of the second connecting shaft 61, and the end portion of the first extending portion 62 far from the second connecting shaft 61 extends into the tooth slot 51 of the ratchet 50 and is matched with the tooth slot 51. Like this, pawl 60 can rotate around second connecting axle 61, if need dismantle the hold-in range subassembly, can rotate pawl 60 to first extension 62 and the cooperation of breaking away from with tooth's socket 51, and then make the staff to the operation of pawl 60 easier, simple and convenient, reduced the operation degree of difficulty. Meanwhile, the structure of the pawl 60 is simpler, the processing and the realization are easy, and the processing cost of the pawl 60 is reduced.

Specifically, the first end of the first extending portion 62 is fixedly connected to the second connecting shaft 61, the second end of the first extending portion 62 extends into the tooth groove 51 of the ratchet 50 and is matched with the tooth groove 51, the spring is connected to the first extending portion 62, and the connecting position of the spring and the first extending portion is located between the first end and the second end, so that the first extending portion 62 can be matched with the tooth groove 51 and plays a role in loosening.

As shown in fig. 5, the pawl 60 further includes a second extension 63. The second extending portion 63 is provided on the second connecting shaft 61 and extends in the radial direction of the second connecting shaft 61, and the first extending portion 62 and the second extending portion 63 are provided at intervals in the circumferential direction of the second connecting shaft 61. Wherein the timing belt 40 is in a relaxed state by rotating the second extension 63 in the second direction to disengage the first extension 62 from the ratchet 50. The first direction is opposite to the second direction. Therefore, the operator can operate the pawl 60 by pulling the second extending part 63, so that the operator can operate the pawl 60 more easily and conveniently, and the operation difficulty is reduced.

Specifically, first extension 62 and second extension 63 structure as an organic whole, when needs are dismantled drive assembly or are relaxed hold-in range 40, the staff stirs second extension 63 along the second direction, in order to drive first extension 62 through second extension 63 and rotate along the second direction, until first extension 62 and tooth's socket 51 break away from the cooperation, at this moment, the staff can rotate first connecting axle 20 along the second direction, in order to drive second synchronous pulley 30 through first connecting axle 20 and rotate along the second direction, and then relax hold-in range 40.

In this embodiment, the first direction is a counterclockwise direction, and the second direction is a clockwise direction.

It should be noted that the selection of the first direction and the second direction is not limited to this. Optionally, the first direction is clockwise and the second direction is counter-clockwise.

In the present embodiment, the ratchet 50 is disposed coaxially with the first connecting shaft 20, and the second timing pulley 30 is disposed coaxially with the first connecting shaft 20. Thus, the arrangement ensures that the first connecting shaft 20 drives the ratchet 50 and the second synchronous pulley 30 to rotate coaxially, and avoids the influence on the transmission stability of the synchronous belt assembly caused by the eccentric rotation of the ratchet 50 and the second synchronous pulley 30.

As shown in fig. 1, 3, 4 and 6, the timing belt assembly further includes an abutment structure 80. The abutting structure 80 is disposed on the seat body 10. Wherein the abutment structure 80 has an abutment state and a release state. When the abutment structure 80 is in the abutment state, the abutment structure 80 is pressed against the timing belt 40. When the abutment structure 80 is in the released state, the abutment structure 80 is separated from the timing belt 40. In this way, the using state (operating state and disassembling state) of the synchronous belt component can be adjusted by adjusting the using state of the abutting structure 80, so that the state of the synchronous belt component can be adjusted more easily and conveniently by workers, and the operation difficulty is reduced.

Specifically, when the hold-in range subassembly is in the running state and treats conveying 100 and convey, the staff operates butt structure 80 to make butt structure 80 be in the butt state, then butt structure 80 presses and establishes on hold-in range 40, so that hold-in range 40 and the good laminating of first synchronous pulley and second synchronous pulley 30, has promoted hold-in range subassembly's operational reliability and stability. When the timing belt assembly is in the dismantlement state, the staff operates the butt structure 80 to make the butt structure 80 be in the release state, then the butt structure 80 separates with the timing belt 40, is convenient for the staff to pull down the timing belt 40 from first timing pulley and second timing pulley 30.

Alternatively, the seat body 10 is a U-shaped structure, and the abutting structure 80 includes a plurality of mounting portions 81 and an abutting shaft 82. Wherein at least one mounting portion 81 is disposed on a first side of the U-shaped structure, at least one mounting portion 81 is disposed on a second side of the U-shaped structure, and at least two mounting portions 81 are disposed opposite to each other. Each mounting portion 81 has a mounting groove 811. Both ends of the abutting shaft 82 are respectively inserted into the two mounting grooves 811. Like this, above-mentioned setting makes butt structure 80's structure simpler, and easy processing, realization also make the staff to butt structure 80's state adjustment easier, simple and convenient, have reduced the operation degree of difficulty.

In the present embodiment, the abutment structure 80 includes two mounting portions 81 and an abutment shaft 82. One of the mounting portions 81 is disposed on a first side of the U-shaped structure, the other mounting portion 81 is disposed on a second side of the U-shaped structure, and the two mounting portions 81 are disposed opposite to each other. Each mounting portion 81 has a mounting groove 811. Both ends of the abutting shaft 82 are respectively inserted into the two mounting grooves 811. Specifically, the contact shaft 82 can press-contact the timing belt 40 or be separated from the timing belt 40, and the mounting portion 81 is used to mount the contact shaft 82, so that the contact shaft 82 can be more easily and conveniently detached.

As shown in fig. 7, the mounting groove 811 includes a first groove section 8111 and a second groove section 8112 connected in sequence, and the first groove section 8111 and the second groove section 8112 are disposed at an included angle. The extending direction of the second slot section 8112 is along the height direction of the seat body 10. Optionally, the first slot segment 8111 and the second slot segment 8112 are arranged perpendicular to each other. In this way, the end of the abutment shaft 82 can slide along the first slot section 8111 and the second slot section 8112, and when the end of the abutment shaft 82 slides into the second slot section 8112, the abutment shaft 82 is pressed on the timing belt 40, so that the abutment structure 80 is in an abutment state, and the state adjustment of the abutment structure 80 by a worker is simpler.

Specifically, when the end of the abutment shaft 82 is located within the first slot segment 8111, the abutment shaft 82 is separated from the timing belt 40 to place the abutment structure 80 in a released state. When the operator operates the end of the abutment shaft 82 to slide from the first slot section 8111 into the second slot section 8112, the abutment structure 80 is switched from the released state to the abutment state. When the hold-in range subassembly is dismantled to needs, the staff operates the tip of butt axle 82 and slides to in the first groove section 8111 by second groove section 8112 to make butt structure 80 switch to the release state by the butt state, the staff of being convenient for is dismantled the hold-in range subassembly.

As shown in fig. 6, the abutting shaft 82 includes a first shaft segment 821, a second shaft segment 822 and a third shaft segment 823 which are connected in sequence, the first shaft segment 821 extends into one mounting groove 811 and can slide along the mounting groove 811, the third shaft segment 823 extends into the other mounting groove 811 and can slide along the mounting groove 811, and the outer surface of the second shaft segment 822 can be attached to the timing belt 40. When the first shaft segment 821 and the second shaft segment 822 slide into the second groove segment 8112 along the first groove segment 8111, the abutting structure 80 is switched from the releasing state to the abutting state. Like this, first axle section 821 stretches into in one mounting groove 811 and can slide along this mounting groove 811, and third axle section 823 stretches into in another mounting groove 811 and can slide along this mounting groove 811, and second axle section 822 is used for crimping or separation with hold-in range 40 to make the structure of butt axle 82 simpler, easy processing, realization have reduced the processing degree of difficulty of butt axle 82.

In this embodiment, the mounting groove 811 is an L-shaped groove, the end portion of the first groove section 8111 far from the second groove section 8112 extends to the surface of the mounting portion 81, and the inner surface of the end of the second groove section 8112 far from the first groove section 8111 is an arc-shaped surface, so that the first shaft section 821 and the third shaft section 823 are more stably matched with the second groove section 8112, and the abutting structure 80 can be stably in an abutting state.

In the present embodiment, the center axis of the abutment shaft 82 and the center axis of the second timing pulley 30 are arranged in parallel with each other. Thus, the arrangement avoids the interference between the abutting shaft 82 and the second synchronous pulley 30, which affects the normal operation of the synchronous belt assembly, and improves the operation reliability of the synchronous belt assembly.

In the present embodiment, the ratchet 50 is provided with a plurality of marks, and the marks are arranged at intervals along the circumferential direction of the ratchet 50. Specifically, each sign corresponds different elasticity degree respectively, provides very big facility for the plant maintenance, also makes staff more convenient to the regulation of the elasticity degree of hold-in range 40.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

the second synchronous belt wheel is a driven wheel, and the piece to be conveyed is arranged on the synchronous belt. When one side of treating the transmission piece of hold-in range installation is in the lax state, the staff operates the ratchet, so that the ratchet rotates along first direction, because ratchet and second synchronous pulley fixed connection, then the ratchet can drive second synchronous pulley and rotate along first direction, for example first direction is anticlockwise, in order to carry out the tensioning through second synchronous pulley to one side of treating the transmission piece of hold-in range installation, and then the problem that the hold-in range subassembly is easy to become loose in long-term use among the prior art has been solved, transmission assembly's transmission reliability has been promoted. Wherein, ratchet mechanism's the same direction of following the tooth direction with first direction to ensure that the ratchet can rotate along first direction for the pawl, promoted ratchet mechanism to the tensioning reliability of hold-in range. Meanwhile, if the ratchet wheel rotates along a second direction opposite to the first direction, the pawl can abut against the tooth groove to prevent the ratchet wheel from rotating along the second direction, so that the loosening effect is achieved, and the second synchronous pulley can be prevented from rotating along the second direction to cause the loosening of the synchronous belt.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A synchronous belt assembly, comprising:

the first synchronous belt wheel is in driving connection with a driving device, and the outer peripheral surface of the first synchronous belt wheel is provided with a first tooth-shaped part;

a second timing pulley (30), the outer peripheral surface of which has a second toothed portion;

a synchronous belt (40) sleeved on the first synchronous pulley and the second synchronous pulley (30), wherein the inner circumferential surface of the synchronous belt (40) is provided with a third tooth-shaped part meshed with the first tooth-shaped part and the second tooth-shaped part;

the ratchet mechanism comprises a ratchet wheel (50) and a pawl (60), wherein part of the pawl (60) extends into a tooth groove (51) of the ratchet wheel (50) and is matched with the tooth groove (51); the ratchet wheel (50) is fixedly connected with the second synchronous pulley (30);

wherein the second synchronous pulley (30) tensions the synchronous belt (40) by rotating the ratchet wheel (50) in a first direction so that the ratchet wheel (50) rotates the second synchronous pulley (30); the tooth following direction of the ratchet mechanism is consistent with the first direction.

2. The synchronous belt assembly of claim 1, further comprising:

a base body (10);

the first connecting shaft (20) penetrates through the seat body (10) and is rotatably connected with the seat body (10), and the second synchronous belt wheel (30) and the ratchet wheel (50) are fixedly connected with the first connecting shaft (20); wherein the first connecting shaft (20) drives the ratchet wheel (50) and the second synchronous pulley (30) to rotate synchronously by rotating the first connecting shaft (20) along the first direction.

3. The synchronous belt assembly of claim 2, wherein the pawl (60) is rotatably disposed on the housing (10), the synchronous belt assembly further comprising:

an elastic structure (70), the elastic structure (70) is arranged on the seat body (10) and connected with the pawl (60) for applying an elastic force to the pawl (60) to move towards one side of the ratchet wheel (50).

4. The belt assembly of claim 3, wherein the resilient structure (70) is a spring having a first end connected to the housing (10) and a second end connected to the pawl (60).

5. The synchronous belt assembly of claim 2, wherein the pawl (60) comprises:

the second connecting shaft (61) is arranged on the seat body (10) in a penetrating mode and is rotatably connected with the seat body (10);

the first extending portion (62) is arranged on the second connecting shaft (61) and extends along the radial direction of the second connecting shaft (61), and the end portion, far away from the second connecting shaft (61), of the first extending portion (62) extends into a tooth groove (51) of the ratchet wheel (50) and is matched with the tooth groove (51).

6. The belt assembly of claim 5, wherein the pawl (60) further comprises:

the second extending portion (63) is arranged on the second connecting shaft (61) and extends along the radial direction of the second connecting shaft (61), and the first extending portion (62) and the second extending portion (63) are arranged at intervals along the circumferential direction of the second connecting shaft (61);

wherein the timing belt (40) is in a relaxed state by rotating the second extension (63) in a second direction to disengage the first extension (62) from the ratchet (50); the first direction is opposite to the second direction.

7. Synchronous belt assembly according to claim 2, characterized in that the ratchet wheel (50) is arranged coaxially with the first connecting shaft (20) and the second synchronous pulley (30) is arranged coaxially with the first connecting shaft (20).

8. The synchronous belt assembly of claim 2, further comprising:

the abutting structure (80) is arranged on the seat body (10); wherein the abutment structure (80) has an abutment state and a release state; when the abutting structure (80) is in the abutting state, the abutting structure (80) is pressed on the synchronous belt (40); when the abutment structure (80) is in the released state, the abutment structure (80) is separated from the timing belt (40).

9. The belt assembly of claim 8, wherein the seat (10) is a U-shaped structure, the abutment structure (80) comprising:

a plurality of mounting portions (81), at least one of the mounting portions (81) being disposed on a first side of the U-shaped structure, at least one of the mounting portions (81) being disposed on a second side of the U-shaped structure, at least two of the mounting portions (81) being disposed opposite one another; each mounting portion (81) is provided with a mounting groove (811);

the supporting shaft (82), the both ends of supporting shaft (82) stretch into two respectively in mounting groove (811).

10. The synchronous belt assembly of claim 9, wherein the mounting groove (811) comprises a first groove segment (8111) and a second groove segment (8112) connected in sequence, the first groove segment (8111) and the second groove segment (8112) being disposed at an included angle; the extending direction of the second groove section (8112) is along the height direction of the seat body (10).

11. The synchronous belt assembly of claim 10, wherein the butt shaft (82) comprises a first shaft segment (821), a second shaft segment (822) and a third shaft segment (823) connected in sequence, the first shaft segment (821) extends into one of the mounting grooves (811) and can slide along the mounting groove (811), the third shaft segment (823) extends into the other mounting groove (811) and can slide along the mounting groove (811), and the outer surface of the second shaft segment (822) can be attached to the synchronous belt (40); wherein the abutment structure (80) is switched from the released state to the abutting state when the first shaft segment (821) and/or the second shaft segment (822) is slid along the first slot segment (8111) into the second slot segment (8112).