CN216642995U

CN216642995U - Tensioning structure and engineering machinery

Info

Publication number: CN216642995U
Application number: CN202220177394.8U
Authority: CN
Inventors: 苗清波; 季苏阳; 魏鹤
Original assignee: Sany Heavy Machinery Ltd
Current assignee: Sany Heavy Machinery Ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-05-31
Anticipated expiration: 2032-01-21

Abstract

The utility model relates to the technical field of engineering machinery, in particular to a tensioning structure and engineering machinery. The tight structure that rises includes: a support; the wheel shaft is arranged on the bracket; the tensioning wheel is rotatably arranged on the wheel shaft and can slide along the axial direction of the wheel shaft; and the tension force adjusting piece is arranged between the wheel shaft and the bracket so as to adjust the tension force of the belt. The tension wheel is arranged on the wheel shaft in a sliding manner along the axial direction of the wheel shaft, so that the tension wheel can slide in the axial direction of the wheel shaft, the belt can automatically adjust the position of the tension wheel on the axial direction of the wheel shaft in the running process of the belt, the tension wheel and the two belt wheels can be coplanar, the tension wheel can be arranged in a sliding manner, the coplanarity of the three wheels can be automatically adjusted, the abrasion of the belt is reduced, and the service life of the belt is prolonged.

Description

Tensioning structure and engineering machinery

Technical Field

The utility model relates to the technical field of engineering machinery, in particular to a tensioning structure and engineering machinery.

Background

At present, a tension pulley is a vulnerable part of parts such as automobiles, a belt is easy to elongate after a long time, and the tension force of the belt is insufficient.

In order to solve the problem of insufficient tension force, the prior art provides a multi-section type automatic adjustable automobile tension wheel structure, a tensioner is designed at the spring seat position of the automobile tension wheel, the tightness of a spring can be detected through a pressure sensor, and the automatic adjusting mechanism is tightened through a rotating sleeve of the tensioner. However, the structure is complex in design and large in size space, and the tensioning wheel cannot be adjusted to be coplanar with the two belt pulleys.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model aims to solve the technical problem of overcoming the defect that the tensioning wheel structure in the prior art cannot adjust the coplanarity of the two belt pulleys and the tensioning wheel, and provides a tensioning structure and engineering machinery.

In order to solve the above problems, the present invention provides a tensioning structure, including: a support; the wheel shaft is arranged on the bracket; the tensioning wheel is rotatably arranged on the wheel shaft and can slide along the axial direction of the wheel shaft; and the tension force adjusting piece is arranged between the wheel shaft and the bracket so as to adjust the tension force of the belt.

Optionally, the wheel shaft includes a cylindrical section and a fixed section, one end of the cylindrical section is provided with a first limit structure, the other end of the cylindrical section is provided with a second limit structure, the tension pulley is installed on the cylindrical section and located between the first limit structure and the second limit structure, the tension pulley can slide on the cylindrical section, and the fixed section is connected with the tension force adjusting part.

Optionally, the first limiting structure is a nut in threaded connection with the cylindrical section.

Optionally, the radius of the fixed section is greater than that of the cylindrical section, and the second limiting structure is a snap ring clamped on the cylindrical section.

Optionally, the tensioning force adjusting member is an elastic member.

Optionally, the tensioning structure further comprises an installation part, the wheel shaft is fixed on the installation part, and the elastic part is connected between the installation part and the bracket.

Optionally, the number of elastic component is more than two, and the shaft is fixed in the middle part position of installed part, and the both ends of installed part correspond with two at least elastic components and are connected.

Optionally, the tensioning structure further comprises a fastener, the mounting member is provided with a threaded hole in threaded connection with the fastener, and the fastener penetrates through the threaded hole and abuts against the wheel shaft.

Optionally, the support is a rectangular frame, and the tension wheel is located on the outer side of the rectangular frame.

The present invention also provides an engineering machine, including: the tensioning structure is provided.

The utility model has the following advantages:

1. the tensioning wheel is arranged on the wheel shaft in a sliding mode along the axial direction of the wheel shaft, so that the tensioning wheel can slide in the axial direction of the wheel shaft, the belt can automatically adjust the position of the tensioning wheel in the axial direction of the wheel shaft in the running process of the belt, the tensioning wheel and the two belt wheels can be coplanar, the three wheels can be automatically adjusted to be coplanar in the sliding mode, the abrasion of the belt is reduced, and the service life of the belt is prolonged.

2. The shaft includes cylinder section and canned paragraph, and the one end of cylinder section is equipped with first limit structure, and the other end of cylinder section is equipped with second limit structure, and tight pulley that rises is installed on the cylinder section and is located between first limit structure and the second limit structure, and tight pulley that rises can slide on the cylinder section, and the canned paragraph is connected with the tight power regulating part that rises. The axial position of the tension wheel is limited through the two limiting structures, so that the tension wheel can slide in a certain range.

3. First limit structure is for the nut with cylinder section threaded connection, and the one end that the fixed section was kept away from to the cylinder section has the external screw thread, the simple structure of nut, and it is convenient to connect.

4. The tension force adjusting piece is an elastic piece, the tension force between the tension wheel and the belt is always kept through the arrangement of the elastic piece, the belt is abraded and elongated along with the long-time use of the belt, and at the moment, a certain tension force can be still ensured even if the belt is elongated because of the pretightening force of the elastic piece, so that the belt is prevented from falling off or abnormal sound.

5. The tensioning structure further comprises an installation part, the wheel shaft is fixed on the installation part, and the elastic part is connected between the installation part and the support. The installed part is convenient for fixing the elastic part, and the fixing mode is simple and convenient.

6. The tensioning structure further comprises a fastener, a threaded hole in threaded connection with the fastener is formed in the mounting piece, the fastener penetrates through the threaded hole to abut against the wheel shaft, and the wheel shaft is locked on the mounting piece through the fastener, so that the wheel shaft is firmly fixed on the mounting piece.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 shows a schematic front view of a tensioning structure according to an embodiment of the utility model;

fig. 2 shows a schematic left-side view of the tensioning arrangement of fig. 1;

fig. 3 shows a schematic top view of the tensioning arrangement of fig. 1.

Description of reference numerals:

10. a support; 20. a wheel axle; 21. a cylindrical section; 22. a fixed section; 30. a tension wheel; 40. an elastic member; 51. a nut; 52. a snap ring; 60. a mounting member; 70. a fastener.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 3, the tensioning structure of the present embodiment includes a bracket 10, a wheel axle 20, a tensioning wheel 30 and a tensioning force adjusting member, wherein the wheel axle 20 is disposed on the bracket 10; the tension wheel 30 is rotatably arranged on the wheel shaft 20 and can be slidably arranged along the axial direction of the wheel shaft 20; the tension adjusting member is provided between the axle 20 and the bracket 10 to adjust the tension of the belt.

By applying the tensioning structure of the embodiment, the tensioning wheel 30 is slidably disposed on the wheel shaft 20 along the axial direction of the wheel shaft 20, so that the tensioning wheel 30 is slidable in the axial direction of the wheel shaft 20, in the operation process of the belt, the position of the tensioning wheel in the axial direction of the wheel shaft 20 is automatically adjusted by the belt, the tensioning wheel 30 and the two belt pulleys can be coplanar, and the slidable arrangement of the tensioning wheel 30 can realize the automatic adjustment of the coplanarity of the three wheels, reduce the wear of the belt, and prolong the service life of the belt.

In this embodiment, the wheel axle 20 includes a cylindrical section 21 and a fixed section 22, one end of the cylindrical section 21 is provided with a first limit structure, the other end of the cylindrical section 21 is provided with a second limit structure, the tension roller 30 is installed on the cylindrical section 21 and is located between the first limit structure and the second limit structure, the tension roller 30 can slide on the cylindrical section 21, and the fixed section 22 is connected with the tension force adjusting member. The axial position of the tension wheel 30 is limited through the two limiting structures, so that the tension wheel 30 can slide in a certain range.

In this embodiment, the first limiting structure is a nut 51 in threaded connection with the cylindrical section 21, an external thread is arranged at one end of the cylindrical section 21, which is far away from the fixing section 22, the nut 51 has a simple structure, and the connection mode is convenient.

In this embodiment, as shown in fig. 1 and 3, the radius of the fixing section 22 is larger than that of the cylindrical section 21, and the second limiting structure is a snap ring 52 clamped on the cylindrical section 21. It will be appreciated that in other embodiments, the snap ring 52 may not be provided, a step surface is formed between the fixed segment 22 and the cylindrical segment 21, and the second limiting structure is a step surface.

In this embodiment, the tension force adjusting member is the elastic member 40, the arrangement of the elastic member 40 enables the tension force between the tension pulley and the belt to be always maintained, the belt is worn and elongated along with the long-time use of the belt, and at this time, a certain tension force can be still ensured even if the belt is elongated because of the pretightening force of the elastic member 40, so that the belt is prevented from falling off or abnormal sound. Preferably, the elastic member 40 is a spring. It will be appreciated that in other embodiments the resilient member is a resilient sleeve or the like.

In this embodiment, the elastic member 40 is disposed on one side of the wheel axle 20 close to the pulley, and after the tension wheel 30 is tensioned, the elastic member 40 is in a compressed state, so that the belt can satisfy the required tension force. When the belt is used for a long time or the belt is lengthened due to temperature and other reasons, the elastic element 40 is in a compressed state, so that the belt can still maintain a certain tension force, and the phenomena of failure, slip, abnormal sound and the like cannot be generated. It is understood that in other embodiments, the elastic member 40 is disposed on the side of the axle 20 away from the pulley, and the elastic member 40 is in an extended state after the tension roller 30 is tensioned.

In this embodiment, the tensioning structure further comprises a mounting member 60, the axle 20 is fixed on the mounting member 60, and the elastic member 40 is connected between the mounting member 60 and the bracket 10. The mounting member 60 facilitates the fixing of the elastic member 40 in a simple manner. Preferably, the mounting member 60 is a mounting block, which is simple in structure, easy to manufacture and easy to install.

Specifically, as shown in fig. 2, a tangent plane is disposed on one side of the fixed segment 22, and the mounting block is provided with a hole for the fixed segment to penetrate through, the shape of the hole is adapted to the shape of the fixed segment 22, so as to ensure that the fixed segment 22 and the mounting block do not rotate relatively.

In this embodiment, the tensioning structure further includes a fastening member 70, the mounting member 60 is provided with a threaded hole for threadedly connecting with the fastening member 70, the fastening member 70 is pressed against the axle 20 through the threaded hole, and the axle 20 is locked to the mounting member 60 by the fastening member 70, so that the axle 20 is firmly fixed to the mounting member 60.

Preferably, the fastener 70 is a bolt, the threaded hole is communicated with the notch hole, and the bolt is in threaded connection with the threaded hole. It is understood that in other embodiments, the fastener 70 is a screw.

Specifically, the bolt passes through the screw hole and pushes up on the tangent plane of fixed section, makes the shaft 20 fasten on the mounting block through screwing up the bolt, and the fixed is firm reliable more. It can be understood that, in other embodiments, the fixing section 22 is in interference fit with the gap, or the fixing section 22 is not provided with a tangent plane, and the mounting block is provided with a circular hole for the fixing section to penetrate through, and the circular hole is in interference fit with the fixing section.

In this embodiment, the number of the elastic members 40 is two, the wheel axle 20 is fixed at the middle position of the mounting member 60, and two ends of the mounting member 60 are correspondingly connected with the two elastic members 40, so that the tension wheel 30 is supported by the two elastic members 40, and the tension wheel 30 is prevented from being inclined. It is understood that in other embodiments, the number of the elastic members 40 is four, etc.

In this embodiment, the bracket 10 is a rectangular frame, and the tension roller 30 is located outside the rectangular frame. It is understood that in other embodiments, the stand 10 is a riser or U-shaped plate.

In this embodiment, the engineering machine further includes an engine and a compressor, a first belt pulley is disposed on an output shaft of the engine, a second belt pulley is disposed on a rotating shaft of the compressor, the belt is sleeved on the tension pulley 30, the first belt pulley and the second belt pulley, a triangle is defined by axes of the tension pulley 30, the first belt pulley and the second belt pulley, the tension structure realizes automatic tension, the structure is simple, the size space is moderate, and the automatic adjustment function is provided.

In this embodiment, the engineering machine is an excavator, a rotary drilling rig, a crane, or the like. Of course, the tensioning structure can also be applied to other engineering machines, automobiles and the like.

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

1. the tensioning structure comprises a support 10, a wheel shaft 20, a tensioning wheel 30, an installation block and springs, wherein a clamping ring 52 and a nut 51 are arranged on the wheel shaft 20, the clamping ring 52 and the nut 51 enable the tensioning wheel 30 to slide in the axial direction of the wheel shaft 20 within a certain range, meanwhile, the two springs are arranged between the support 10 and the installation block, the springs are connected to one side, close to an engine, of the installation block, the springs are compressed after the tensioning wheel 30 is tensioned, and tensioning force meets design requirements. When the engine is started, the belt starts to rotate, the tension pulley 30 is subjected to traction force in the axial direction of the belt, the tension pulley 30 can move in the axial direction, and finally the tension pulley 30, the belt pulley on the rotating shaft of the compressor and the belt pulley on the engine are coplanar.

2. After the tension pulley 30 is tensioned, the compression spring of the block is installed, the spring is in a compression state, so that the belt meets the tension force required, when the belt is used for a long time or the belt is lengthened due to the temperature and other reasons, the belt can still keep a certain tension force due to the fact that the elastic piece 40 is in a compressed state, the phenomena of failure such as rotation, slipping and abnormal sound cannot be generated, and the problem that the belt is loosened and the tension force is insufficient due to the fact that the belt is used for a long time is effectively solved.

3. The tensioning structure utilizes the elastic force of the spring for automatic adjustment, the structure is simple, and meanwhile, the tensioning wheel is subjected to the traction force in the axial direction of the belt, so that the tensioning wheel 30 can move in the axial direction, and finally, the tensioning wheel, the belt pulley on the compressor and the belt pulley on the engine are coplanar.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. A tensioning structure is characterized by comprising:

a support (10);

a wheel axle (20) disposed on the bracket (10);

the tension wheel (30) is rotatably arranged on the wheel shaft (20) and can be slidably arranged along the axial direction of the wheel shaft (20);

and the tension force adjusting piece is arranged between the wheel shaft (20) and the bracket (10) to adjust the tension force of the belt.

2. The tensioning structure according to claim 1, wherein the wheel shaft (20) comprises a cylindrical section (21) and a fixed section (22), one end of the cylindrical section (21) is provided with a first limiting structure, the other end of the cylindrical section (21) is provided with a second limiting structure, the tensioning wheel (30) is mounted on the cylindrical section (21) and located between the first limiting structure and the second limiting structure, the tensioning wheel (30) can slide on the cylindrical section (21), and the fixed section (22) is connected with the tensioning force adjusting member.

3. Tensioning structure according to claim 2, characterized in that the first stop structure is a nut (51) screwed to the cylindrical section (21).

4. The tensioning structure according to claim 2, wherein the radius of the fixing section (22) is larger than that of the cylindrical section (21), and the second limiting structure is a snap ring (52) clamped on the cylindrical section (21).

5. The tensioning structure according to any one of claims 1 to 4, wherein the tensioning force adjusting member is an elastic member (40).

6. Tensioning structure according to claim 5, characterized in that it further comprises a mounting (60), the axle (20) being fixed to the mounting (60), the elastic element (40) being connected between the mounting (60) and the bracket (10).

7. The tensioning structure according to claim 6, wherein the number of the elastic members (40) is more than two, the wheel axle (20) is fixed at the middle position of the mounting member (60), and the two ends of the mounting member (60) are correspondingly connected with at least two elastic members (40).

8. The tensioning structure according to claim 6, further comprising a fastening member (70), wherein the mounting member (60) is provided with a threaded hole in threaded connection with the fastening member (70), and the fastening member (70) is supported on the axle (20) through the threaded hole.

9. The tensioning structure according to any one of claims 1 to 4, wherein the bracket (10) is a rectangular frame, and the tensioning wheel (30) is located on the outer side of the rectangular frame.

10. A work machine, comprising: the tension structure of any one of claims 1 to 9.