CN212775418U

CN212775418U - Automatic tensioning mechanism for synchronous belt of kart

Info

Publication number: CN212775418U
Application number: CN202021316559.2U
Authority: CN
Inventors: 黄杨
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2021-03-23
Anticipated expiration: 2030-07-07

Abstract

The utility model provides an automatic tight mechanism that rises of kart hold-in range relates to the automatic tight technical field that rises of drive belt, has solved not have the automatic tight mechanism that rises of kart hold-in range among the prior art, and the hold-in range of kart needs the technical problem that regularly manual rises and tightly rises. The device comprises an elastic piece, a swing arm, a connecting structure and an idler wheel, wherein the swing arm is positioned on one side of the synchronous belt, which is far away from the motor, one end of the swing arm is rotationally connected with a frame of the kart, the other end of the swing arm is connected with the idler wheel through the connecting structure, and the idler wheel can rotate around the axis of the connecting structure; the idler wheel is positioned at the outer side of the swing arm, and the idler wheel is in contact with the synchronous belt and tightly abuts against the synchronous belt; the one end of elastic component is connected with the frame, and the other end of elastic component is connected with the one end that the swing arm is close to the idler, and when the hold-in range relaxes, the elastic component can stimulate and state the swing arm rotatory round the rotation junction of swing arm and frame to make the idler support tight hold-in range all the time.

Description

Automatic tensioning mechanism for synchronous belt of kart

Technical Field

The utility model belongs to the technical field of the automatic tight mechanism that rises of drive belt technique and specifically relates to an automatic tight mechanism that rises of kart hold-in range is related to.

Background

At present, in the kart industry, most karts adopting synchronous belt transmission do not have a tensioning mechanism special for the synchronous belt, and the position of a driving belt wheel is adjusted to enable the synchronous belt sleeved on the driving belt wheel and a driven belt wheel to reach a certain tensioning force. The defect of the method is that along with the increase of the operation time, the synchronous belt can be gradually elongated under the stretching action of the pretightening force and the driving work, the pretightening force is reduced after the synchronous belt is elongated, the jumping teeth are easy to occur to damage the synchronous belt, and finally the power transmission cannot be carried out, so that the kart in the prior art needs to manually tension the synchronous belt regularly to enable the synchronous belt to have proper pretightening force.

That is, as shown in fig. 1, the motor 6 of the kart is fixed to the frame 9, the output shaft of the motor 6 is connected to the driving pulley 7, and the driving pulley 7 is driven to rotate when the motor 6 is operated. The driving belt wheel 8 is arranged on a rotating shaft between two tires of the kart, and the driving belt wheel 7 and the driving belt wheel 8 are sleeved with the synchronous belt 5. Wherein, the synchronous belt 5 is a tooth-shaped synchronous belt, and the driving belt wheel 7 and the transmission belt wheel 8 are both tooth-shaped belt wheels. The position of the driving belt wheel 7 is changed by manually adjusting the position of the motor 6 on the frame 9, so that the synchronous belt 5 achieves a certain pretightening force.

The applicant has found that the prior art has at least the following technical problems:

in the prior art, an automatic tensioning mechanism for a synchronous belt of a kart is not arranged, and the synchronous belt of the kart needs to be manually tensioned at regular intervals.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an automatic tight mechanism that rises of kart to there is not the synchronous tight mechanism that rises of kart hold-in range among the solution prior art, the hold-in range of kart needs the technical problem that regularly manual rises and tightly rises. The utility model provides a great deal of technological effect (simple structure, convenient to use, production low in manufacturing cost) that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides an automatic tensioning mechanism for a synchronous belt of a kart, which comprises an elastic piece, a swing arm, a connecting structure and an idler wheel, wherein,

the swing arm is positioned on one side, away from the motor, of the synchronous belt, one end of the swing arm is rotationally connected with a frame of the kart, the other end of the swing arm is connected with the idler wheel through the connecting structure, the idler wheel is in contact with the synchronous belt and abuts against the synchronous belt, and the idler wheel can rotate around the axis of the connecting structure; one end of the elastic piece is connected with the frame, the other end of the elastic piece is connected with one end of the swing arm close to the idler, and when the synchronous belt is loosened, the elastic piece can pull the swing arm to rotate around the rotating connection position of the swing arm and the frame, so that the idler is always abutted against the synchronous belt.

Preferably, the elastic member is located above the swing arm.

Preferably, the idler is located below the synchronous belt, and the idler is in contact with an outer side surface of the synchronous belt.

Preferably, the idler is located at an end of the connecting structure remote from the swing arm.

Preferably, the idler wheel comprises a bearing and a wear-resistant layer, and the wear-resistant layer is fixedly arranged on the outer side of the bearing.

Preferably, the wear-resistant layer is made of a POM material.

Preferably, the connecting structure comprises a sleeve, a bolt and a nut, a first annular bulge and a second annular bulge which are arranged in a clearance mode are arranged on the circumferential side wall of the sleeve, the idler wheel is sleeved on the sleeve and is in contact with the first annular bulge, and the second annular bulge is in contact with the swing arm; the sleeve is sleeved on the bolt, the bolt can penetrate through the swing arm and is matched with the nut, the sleeve is connected with the swing arm, and the nut of the bolt and the first annular bulge can clamp the inner ring of the bearing of the idler wheel.

Preferably, a fixed seat is arranged on the frame of the kart, the fixed seat inclines towards the direction close to the synchronous belt, and the elastic piece is connected with the fixed seat.

Preferably, still be provided with the guide on the swing arm, the guide cover is established in the outside of fixed cover, the guide can wind the axis of fixed cover rotates, just fixed cover can restrict the guide breaks away from fixed cover, and the bolt can pass fixed cover will fixed cover with the frame is connected.

Preferably, the elastic member includes a spring.

The utility model discloses kart hold-in range automatic tension mechanism's elastic component enables idler and hold-in range and contacts and support tight hold-in range. When the synchronous belt is stretched due to work, the elastic piece can pull the swing arm to rotate so that the idler wheel continuously supports the synchronous belt tightly. The automatic tensioning mechanism for the synchronous belt of the kart can timely tension the synchronous belt, the synchronous belt does not need to be manually and periodically tensioned, the long-time maintenance-free operation of the synchronous belt of the kart can be realized, and the labor and the cost are saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a first view of a kart equipped with the automatic tensioning structure for the synchronous belt of the kart of the present invention;

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

fig. 3 is a second view of the kart equipped with the automatic tensioning structure for the synchronous belt of the kart of the present invention;

FIG. 4 is a partial enlarged view of FIG. 3 at B;

fig. 5 is a third view of the kart equipped with the automatic tensioning structure for the synchronous belt of the kart of the present invention;

FIG. 6 is a partial enlarged view at C of FIG. 5;

fig. 7 is a first view diagram of the swing arm, the connecting structure and the idler of the carting car synchronous belt automatic tensioning mechanism of the present invention;

fig. 8 is a second view of the kart synchronous belt automatic tensioning mechanism of the present invention, wherein the swing arm, the connecting structure and the idler are connected;

FIG. 9 is a cross-sectional view taken at A-A of FIG. 8;

FIG. 10 is a cross-sectional view taken at B-B of FIG. 8;

FIG. 11 is a first perspective view of the idler;

fig. 12 is a second perspective view of the idler.

In figure 1, an elastic member; 2. swinging arms; 21. mounting holes; 3. a connecting structure; 31. a sleeve; 32. a second annular projection; 33. a first annular projection; 34. an annular ring; 35. a bolt; 36. a nut; 37. a gasket; 4. an idler pulley; 41. a bearing; 411. an inner ring; 42. a wear layer; 5. a synchronous belt; 6. a motor; 7. a drive pulley; 8. a driven pulley; 9. a frame; 91. a fixed seat; 92. a mounting seat; 10. a guide member; 11. fixing a sleeve; 12. a fixing member; 121. a protrusion; 122. an insertion portion.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-6, the utility model provides an automatic tight mechanism that rises of kart hold-in range, including elastic component 1, swing arm 2, connection structure 3 and idler 4, wherein, swing arm 2 is located hold-in range 5 and keeps away from one side of motor 6, and the one end of swing arm 2 rotates with kart's frame 9 to be connected, and swing arm 2's the other end is connected with idler 4 through connection structure 3, and idler 4 contacts and supports tight hold-in range 5 with hold-in range 5. And the idler pulley 4 is able to rotate about the axis of the connecting structure 3. One end of elastic component 1 is connected with frame 9, and the other end of elastic component 1 is connected with the one end that swing arm 2 is close to idler 4, and when hold-in range 5 relaxes, elastic component 1 can stimulate swing arm 2 round swing arm 2 is rotatory with the rotation junction of frame 9 to make idler 4 support tightly all the time hold-in range 5.

The utility model discloses kart hold-in range automatic tension mechanism's elastic component 1 enables idler 4 and hold-in range 5 and contacts and support tight hold-in range 5. When the synchronous belt 5 is stretched due to work, the elastic piece 1 can pull the swing arm 2 to rotate so that the idler pulley 4 continuously abuts against the synchronous belt 5. The automatic tensioning mechanism for the synchronous belt of the kart can timely tension the synchronous belt 5, the synchronous belt 5 does not need to be manually tensioned regularly, the long-time maintenance-free of the synchronous belt 5 of the kart can be realized, and the labor and the cost are saved.

In the present embodiment, referring to fig. 2, the idle pulley 4 is located below the timing belt 5, and the idle pulley 4 is in contact with a surface of the timing belt 5 away from the drive pulley 7. The elastic element 1 is located above the swing arm 2, a fixed seat 91 is arranged on the frame 9, the fixed seat 91 is inclined towards the direction close to the synchronous belt 5 (refer to fig. 3-4), and the elastic element 1 is connected with the fixed seat 91 on the frame 9.

And, with reference to fig. 2 or fig. 7-8, the idler pulley 4 is located at the end of the connecting structure 3 remote from the swing arm 2. Referring to fig. 11 to 12, the idle pulley 4 includes a bearing 41 and a wear-resistant layer 42, and the wear-resistant layer 42 is fixed to an outer side of the bearing 41. Wherein, the wear-resistant layer 42 is made of POM material.

Referring to fig. 10, the connecting structure 3 includes a sleeve 31, a bolt 35, and a nut 36, wherein a circumferential side wall of the sleeve 31 is provided with a first annular protrusion 33 and a second annular protrusion 32 which are arranged with a gap therebetween, the idler pulley 4 is sleeved on an outer side of the sleeve 31, an inner ring 411 of a bearing 41 in the idler pulley 4 is in contact with the first annular protrusion 33, and the second annular protrusion 32 is in contact with the swing arm 2. The sleeve 31 is sleeved on the bolt 35, and the bolt 35 can penetrate through the swing arm 2 and then is matched with the nut 36 to connect the sleeve 31 with the swing arm 2. At this time, the nut 351 of the bolt 35 and the first annular protrusion 33 can clamp the inner ring 411 of the bearing 41 of the idle pulley 4, and at this time, the outer ring of the bearing 41 can still rotate around the axis of the bolt 35 with the wear-resistant layer 42, so that the idle pulley 4 follows the rotation of the timing belt 5.

Preferably, a washer 37 is provided between the nut 351 and the inner race 411 of the bearing 41 of the idler pulley 4.

Preferably, with reference to fig. 10, at least two idler pulleys 4 are sleeved on the sleeve 31 in the axial direction of the bolt 35. In this embodiment, the length of the bearing 41 is smaller than the length of the wear-resistant layer 42 in the axial direction of the idler pulley 4 for any of the idler pulleys 4. Therefore, an annular ring 34 (similar to the spacer 37 but thicker than the spacer 37. moreover, the annular ring 34 and the sleeve 31 are two independent parts, and the annular ring 34 is sleeved on the sleeve 31) is further arranged between any two adjacent idler wheels 4, and the annular rings 34 are respectively contacted with the inner rings 411 of the bearings 41 of the two idler wheels 4.

Referring to fig. 7-9, in the present embodiment, a guide 10 is further disposed on a side of the swing arm 2 close to the frame 9, and a mounting hole 21 is disposed on the swing arm 2, and the mounting hole 21 penetrates through the guide 10. Referring to fig. 9, the automatic tension mechanism for the kart synchronous belt further includes a fixing sleeve 11, the fixing sleeve 11 is composed of two fixing members 12, each fixing member 12 includes a protrusion 121 and an insertion portion 122, the diameter of the protrusion 121 is greater than that of the insertion portion 122, and a through hole is formed in the fixing member 12 along the axial direction of the fixing member 12. In brief, the protruding portion 121 and the insertion portion 122 are both annular structures, and the outer diameter of the protruding portion 121 is larger than that of the insertion portion 122.

The insertion portion 122 of one fixing member 12 is inserted into the mounting hole 21 from one side of the mounting hole 21, the insertion portion 122 of the other fixing member 12 is inserted into the mounting hole 21 from the other side of the mounting hole 21, and the insertion portions 122 of the two fixing members 12 can be in contact with each other. At this time, the swing arm 2 can slightly move along the axial direction of the fixing sleeve 11 composed of the two fixing pieces 12, and the protrusions 121 on the two fixing pieces 12 can prevent the swing arm 2 from separating from the fixing sleeve 11 along the axial direction of the fixing sleeve 11. At the same time, the guide 10 can rotate about the axis of the sleeve 11. The bolt can pass through the through hole of the fixing sleeve 11 (two fixing pieces 12) and the mounting seat 92 (refer to fig. 6) of the frame 9 and then is matched with the nut, so that the fixing sleeve 11 is connected with the mounting seat 92. After the fixing sleeve 11 is connected with the mounting seat 92, the swing arm 2 is rotatably connected with the frame 9, and the swing arm 2 can rotate around the axis of the fixing sleeve 11.

Preferably, the elastic member 1 is a spring.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An automatic tensioning mechanism for a kart synchronous belt is characterized by comprising an elastic piece (1), a swing arm (2), a connecting structure (3) and an idler wheel (4), wherein,

the swing arm (2) is positioned on one side, away from the motor (6), of the synchronous belt (5), one end of the swing arm (2) is rotatably connected with a frame (9) of the kart, and the other end of the swing arm (2) is connected with the idler (4) through the connecting structure (3); the idler wheel (4) is in contact with the synchronous belt (5) and tightly abuts against the synchronous belt (5), and the idler wheel (4) can rotate around the axis of the connecting structure (3);

the one end of elastic component (1) with frame (9) are connected, the other end of elastic component (1) with swing arm (2) are close to the one end of idler (4) is connected, works as when hold-in range (5) are lax, elastic component (1) can stimulate swing arm (2) round swing arm (2) with the rotation junction of frame (9) is rotatory, so that idler (4) support tightly all the time hold-in range (5).

2. The automatic tension mechanism for the kart synchronous belt as claimed in claim 1, wherein the elastic member (1) is located above the swing arm (2).

3. The automatic tension mechanism for the kart synchronous belt according to claim 1, wherein the idler pulley (4) is located below the synchronous belt (5), and the idler pulley (4) is in contact with the surface of the synchronous belt (5) far away from the driving pulley (7) of the kart.

4. The automatic tension mechanism for the kart synchronous belt according to claim 1, wherein the idler pulley (4) is located at one end of the connecting structure (3) far away from the swing arm (2).

5. The automatic tension mechanism of the kart synchronous belt as claimed in claim 1, wherein the idler pulley (4) comprises a bearing (41) and a wear layer (42), and the wear layer (42) is fixed outside the bearing (41).

6. The automatic tension mechanism for the kart synchronous belt as claimed in claim 5, wherein the wear layer (42) is made of POM material.

7. The automatic tensioning mechanism for the kart synchronous belt according to claim 5, wherein the connecting structure (3) comprises a sleeve (31), a bolt (35) and a nut (36), a first annular bulge (33) and a second annular bulge (32) which are arranged at intervals are arranged on the circumferential side wall of the sleeve (31), the idler pulley (4) is sleeved on the sleeve (31) and is in contact with the first annular bulge (33), and the second annular bulge (32) is in contact with the swing arm (2); the sleeve (31) is sleeved on the bolt (35), the bolt (35) can penetrate through the swing arm (2) and is matched with the nut (36), the sleeve (31) is connected with the swing arm (2), and the nut (351) of the bolt (35) and the first annular bulge (33) can clamp the inner ring (411) of the bearing (41) of the idler wheel (4).

8. The automatic tensioning mechanism for the synchronous belt of the kart as claimed in claim 1, wherein a fixed seat (91) is arranged on a frame (9) of the kart, the fixed seat (91) inclines towards a direction close to the synchronous belt (5), and the elastic member (1) is connected with the fixed seat (91).

9. The automatic tension mechanism for the kart synchronous belt as claimed in claim 1, wherein a guide (10) is further arranged on the swing arm (2), the guide (10) is sleeved on the outer side of the fixed sleeve (11), the guide (10) can rotate around the axis of the fixed sleeve (11), the fixed sleeve (11) can prevent the guide (10) from being separated from the fixed sleeve (11) along the length direction of the fixed sleeve (11), and a bolt can penetrate through the fixed sleeve (11) to connect the fixed sleeve (11) with the frame (9).

10. The automatic tension mechanism of kart synchronous belt according to claim 1, characterized in that the elastic member (1) comprises a spring.