CN211995911U

CN211995911U - Crawler tensioning device and crawler type engineering machinery

Info

Publication number: CN211995911U
Application number: CN202020782103.9U
Authority: CN
Inventors: 于德刚; 钟佩文; 杨能
Original assignee: Sany Heavy Machinery Ltd
Current assignee: Sany Heavy Machinery (Chongqing) Co.,Ltd.
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2020-11-24
Anticipated expiration: 2030-05-12

Abstract

A crawler tensioning device and crawler type engineering machinery relate to the technical field of engineering machinery. The crawler tensioning device comprises a main pump, a tensioning oil cylinder and a guide wheel, wherein the guide wheel is arranged on the inner side of the crawler and used for tensioning the crawler, a rod cavity of the tensioning oil cylinder is connected with the guide wheel, and a rod-free cavity of the tensioning oil cylinder is communicated with the main pump through a first oil way. The crawler-type engineering machine comprises the crawler tensioning device. The track tensioning device can solve the problem that the large-tonnage tensioning force is limited by the specification of the spring.

Description

Crawler tensioning device and crawler type engineering machinery

Technical Field

The utility model relates to an engineering machine tool technical field particularly, relates to a track overspeed device tensioner and crawler-type engineering machine tool.

Background

The crawler traveling device has the advantages of large traction force, strong climbing capability, small turning radius, low ground pressure and the like, thereby being widely applied to the fields of engineering machinery, mining machinery, construction machinery and the like. The crawler traveling device is influenced by the complex road conditions on the ground in the traveling process and is inclined forwards under the action of large excavating force, the front end of the crawler retracts under the stress, the proper tension is kept for ensuring that the crawler traveling device of the excavator can work normally, the impact load and the extra power consumption during traveling are reduced, the crawler is prevented from being broken or derailed and other faults in the traveling process of a vehicle due to impact, and each crawler is provided with a tensioning device.

The track tensioning device has great influence on the walking performance of the track, and in the prior art, a spring tensioning method is mainly adopted for tensioning the track. However, the spring tensioning method has a certain proportional relationship between the elastic force of the spring and the structural size of the spring, and the size of the spring is too small, so that the rigidity of the spring is not enough to keep the crawler in a tensioned state; along with the crawler-type engineering machinery model is bigger and bigger, the required tensioning force of tensioning track increases thereupon, and the spring is owing to receive specification restriction, and the spring size can not continue to increase, can't satisfy the demand of tensioning force, and owing to receive the restriction in whole space, the tensioning spring of big specification also often can't use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a track overspeed device tensioner and crawler-type engineering machine tool, this track overspeed device tensioner and crawler-type engineering machine tool can solve the problem that the large-tonnage tensile force received the restriction of spring specification.

The embodiment of the utility model is realized like this:

an aspect of the utility model provides a track tensioning device, this track tensioning device include main pump, tensioning hydro-cylinder and leading wheel, the inboard of track is located to the leading wheel, is used for the tensioning the track, the pole chamber of tensioning hydro-cylinder with the leading wheel is connected, the no pole chamber of tensioning hydro-cylinder through first oil circuit with the main pump intercommunication. The track tensioning device can solve the problem that the large-tonnage tensioning force is limited by the specification of the spring.

Optionally, the track tensioning device further includes a controller, an overflow valve, and an overflow detection assembly for detecting overflow information of the overflow valve, the overflow valve is connected to an oil return path of the tensioning cylinder, the overflow detection assembly is electrically connected to the controller, and the controller is configured to control starting and stopping of the traveling mechanism of the track-type engineering machine according to the overflow information of the overflow detection assembly.

Optionally, the track tensioning device further comprises a check valve connected to the first oil line for allowing oil to flow from the main pump to the rodless chamber of the tensioning cylinder.

Optionally, the track tensioning device further comprises a pressure reducing valve connected to the first oil line and located between the main pump and the one-way valve.

Optionally, the track tensioning device further comprises an accumulator, the accumulator being connected to the first oil path.

Optionally, the track tensioning device further includes a pressure sensor, the pressure sensor is connected to the first oil path and electrically connected to the controller, so as to transmit a pressure signal of the first oil path detected by the pressure sensor to the controller, and the controller may control the main pump according to the pressure signal.

Optionally, the track tensioning device further comprises an alarm, the alarm is electrically connected with the controller, the controller can send a control signal to the alarm according to the pressure signal, and the alarm is used for giving an alarm according to the control signal.

Optionally, the alarm is an audible and visual alarm.

Optionally, the track tensioning device further comprises a control valve connected to the first oil path between the main pump and the tensioning cylinder.

The utility model discloses an on the other hand provides a crawler-type engineering machine tool, and this crawler-type engineering machine tool includes foretell track overspeed device tensioner. The crawler-type engineering machine can solve the problem that the large-tonnage tension force is limited by the specification of the spring.

The beneficial effects of the utility model include:

the application provides a track overspeed device tensioner includes main pump, tensioning hydro-cylinder and leading wheel. The guide wheel is arranged on the inner side of the track and used for tensioning the track, a rod cavity of the tensioning oil cylinder is connected with the guide wheel, and a rodless cavity of the tensioning oil cylinder is communicated with the main pump through a first oil way. Therefore, the main pump of the crawler tensioning device supplies oil to the rodless cavity of the tensioning oil cylinder through the first oil way, so that the piston of the tensioning oil cylinder is pushed to move, the guide wheel connected with the piston rod of the tensioning oil cylinder is close to and acts on the crawler, and the crawler achieves the tensioning effect. Therefore, this application adopts the drive leading wheel and then makes the track tensioning, compares in prior art, and the track overspeed device tensioner of this application can solve the problem that the large-tonnage tensile force received the restriction of spring specification.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is one of schematic structural diagrams of a track tensioning device according to an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of a track tensioning device according to an embodiment of the present invention.

Icon: 10-a main pump; 20-tensioning oil cylinder; 30-a guide wheel; 41-track; 43-a frame; 50-a first oil path; 51-a one-way valve; 52-a pressure relief valve; 53-an accumulator; 54-a pressure sensor; 55-a control valve; 60-oil return path; 61-relief valve; 62-an overflow detection assembly; 70-a controller; 80-alarm.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the construction process of the engineering machinery, in order to overcome the severe open-air working environment and the variable road conditions, especially the action site of the rugged road and the gravel ground, etc., the engineering machinery usually adopts a crawler type traveling mechanism, such as a crawler crane, a crawler type excavator, a crawler type bulldozer, etc. In order to ensure that the crawler-type travelling mechanism can work normally, the crawler keeps proper tension degree in the travelling process, impact load and extra power consumption in the travelling process are reduced, and the crawler is prevented from being broken or derailed due to impact in the travelling process, and the common crawler-type travelling mechanism is provided with a crawler tensioning device. The existing track tensioning device adopts a spring tensioning method, and the method is limited by the specification of a spring. Therefore, the application provides a novel track tensioning device, so that the tensioning force of a track cannot be limited by the specification of a spring, and the requirement of the large-tonnage tensioning force of the crawler-type engineering machinery can be met.

Referring to fig. 1 and 2 in combination, the present embodiment provides a track-tightening apparatus including a main pump 10, a tightening cylinder 20, and guide wheels 30. Wherein, the guide wheel 30 is arranged at the inner side of the track 41 and is used for tensioning the track 41, the rod cavity of the tensioning oil cylinder 20 is connected with the guide wheel 30, and the rodless cavity of the tensioning oil cylinder 20 is communicated with the main pump 10 through a first oil path 50.

First, in the present embodiment, the guide wheels 30 are provided inside the crawler belt 41, and are used to push the crawler belt 41 by the piston rod of the tensioning cylinder 20 to tension the crawler belt 41. Specifically, the specific location of the guide wheels 30 inside the track 41 can be determined by those skilled in the art according to the actual situation of the excavator, and is not limited herein as long as the guide wheels 30 are pushed to tension the track 41.

In addition, it should be understood that the guide wheel 30 provided in the present application is used for tensioning the track 41, and besides the guide wheel 30, in other embodiments, the guide wheel may also be a bump or the like, as long as the guide wheel acts on the track 41 to tension the track 41 without damaging the track 41, and those skilled in the art may substitute other components.

Second, the rod-less chamber of the tensioning cylinder 20 communicates with the main pump 10 through the first oil passage 50, and the rod chamber of the tensioning cylinder 20 is connected with the guide wheel 30 through the piston rod. In this way, the main pump 10 can supply oil to the rodless chamber of the tensioning cylinder 20 through the first oil passage 50, thereby driving the piston rod of the tensioning cylinder 20 to move, and further pushing the guide wheel 30 connected to the piston rod in the rod chamber of the tensioning cylinder 20 to move toward the track 41, so as to tension the track 41.

Thirdly, the tensioning force required by the crawler 41 during the forward or parking operation and the reverse operation of the construction machine may be different, that is, the tensioning force required by the crawler 41 during the forward or parking operation is relatively small, and the tensioning force required by the crawler 41 during the reverse operation is relatively large. In this case, a person skilled in the art can control the amount of the tightening force by controlling the amount of oil supplied to the main pump 10.

Fourth, in the present embodiment, the tensioning cylinder 20 is provided on the frame 43 of the crawler type working machine, so as to drive the movement of the guide wheels 30. Of course, the position of the tensioning cylinder 20 is only an example of the present application, and in other embodiments, the tensioning cylinder 20 may be disposed at other places as long as it is convenient to drive the idler wheel to tension the track, and is not limited herein.

In summary, the track tensioning device provided by the present application includes a main pump 10, a tensioning cylinder 20, and a guide wheel 30. Wherein, the guide wheel 30 is arranged at the inner side of the track 41 and is used for tensioning the track 41, the rod cavity of the tensioning oil cylinder 20 is connected with the guide wheel 30, and the rodless cavity of the tensioning oil cylinder 20 is communicated with the main pump 10 through a first oil path 50. In this way, the main pump 10 of the track tensioning device of the present application supplies oil to the rodless cavity of the tensioning cylinder 20 through the first oil path 50, and then pushes the piston of the tensioning cylinder 20 to move, so that the guide wheel connected to the piston rod of the tensioning cylinder 20 approaches and acts on the track 41, and the track 41 achieves the tensioning effect. Therefore, the driving guide wheels 30 are adopted to drive the track 41 to be tensioned, and compared with the prior art, the track tensioning device can solve the problem that the large-tonnage tensioning force is limited by the specification of the spring.

Further, in the present embodiment, the track tensioning apparatus further includes a controller 70, an overflow valve 61, and an overflow detection assembly 62 for detecting overflow information of the overflow valve 61, wherein the overflow valve 61 is connected to the oil return path 60 of the tensioning cylinder 20, the overflow detection assembly 62 is electrically connected to the controller 70, and the controller 70 is configured to control the start and stop of the traveling mechanism of the track-type construction machine according to the overflow information of the overflow detection assembly 62.

First, in the present embodiment, the relief valve 61 is provided in the oil return path 60 of the track-tightening device in order to ensure safe operation of the track-tightening device. When the crawler tensioning device is subjected to large external impact, the overflow valve 61 is opened to overflow, so that the hydraulic crawler tensioning device is protected from unloading.

Secondly, the overflow detection assembly 62 is configured to detect an overflow signal of the overflow valve 61, and feed back the overflow signal of the overflow valve 61 to the controller 70, and the controller 70 controls the running mechanism of the crawler-type engineering machine to start and stop according to the overflow signal of the overflow valve 61. For example, when the track tensioning device is subjected to a large external impact, the tensioning cylinder 20 is compressed, and the piston of the tensioning cylinder 20 moves to the right (based on the orientation shown in fig. 1), so that the oil pressure in the rodless cavity of the tensioning cylinder 20 is greatly increased, and when the oil pressure exceeds the preset safety oil pressure of the track tensioning device, the overflow valve 61 is pushed open, so that the pressure in the whole system of the track tensioning device does not exceed an allowable safety value, and the system is ensured not to have an accident due to overhigh pressure.

In addition, the track-tightening device of the present application is further provided with an overflow detection assembly 62, and the overflow detection assembly 62 may be provided in an oil path on one side of the overflow valve 61, for example, to detect overflow information of the overflow valve 61. In this way, when the oil pressure in the entire hydraulic system of the track tensioner exceeds a safety allowance value, the overflow valve 61 overflows, and at the same time, the controller 70 may timely control the traveling mechanism of the track type construction machine to cut off the traveling signal according to the overflow condition of the overflow valve 61, so as to timely perform a relevant check of external impact.

For example, the overflow detecting assembly 62 may be a flow sensor, which is relatively inexpensive, reliable and not easily damaged.

Further, in order to prevent the oil in the first oil passage 50 from flowing backward, in the present embodiment, the track tensioner further includes a check valve 51, and the check valve 51 is connected to the first oil passage 50 for allowing the oil to flow from the main pump 10 to the rodless chamber of the tensioner cylinder 20. That is, the present application allows only the oil to flow from the main pump 10 to the tensioning cylinder 20 due to the presence of the check valve 51, and the oil cannot flow back to the main pump 10 from the tensioning cylinder 20 in the reverse direction, so as to prevent the main pump 10 from being damaged.

In order to reduce the initial pressure of the main pump 10 to a proper level and keep the output pressure constant, the track-tightening device of the present application may optionally further include a pressure-reducing valve 52, and the pressure-reducing valve 52 may be connected to the first oil passage 50 and may be located between the main pump 10 and the check valve 51.

Optionally, in this embodiment, the track-tightening device further includes an accumulator 53, and the accumulator 53 is bypassed on the first oil passage 50.

In this way, when the track tensioning device is subjected to a large external impact, the tensioning cylinder 20 is compressed, the piston of the tensioning cylinder 20 moves to the right (based on the orientation shown in fig. 1), so that the oil pressure in the rodless cavity of the tensioning cylinder 20 increases sharply, at this time, the pressure oil in the tensioning cylinder 20 enters the energy accumulator 53, the energy accumulator 53 absorbs and compresses the energy in the hydraulic system and converts the energy into compression energy or potential energy to be stored, and at this time, the external impact force is absorbed; when the external impact is further increased, the oil pressure in the system exceeds the preset safe pressure value of the system, and the overflow valve 61 is pushed open at the moment, so that the hydraulic track tensioning device is unloaded for protection, the pressure in the whole system of the track tensioning device does not exceed the allowable safe pressure value, and the system is prevented from accidents caused by overhigh pressure.

When the external impact on the track tensioning device disappears, the energy accumulator 53 releases the stored energy to further drive the piston in the tensioning cylinder 20 to move towards the guide wheel 30, so that the piston rod of the tensioning cylinder 20 drives the guide wheel 30 to approach and push the track 41, and the effect of tensioning the track 41 is achieved. The working safety of the whole hydraulic system of the track tensioning device is higher and more reliable through the combined action of the energy accumulator 53 and the tensioning oil cylinder 20.

Further, in this embodiment, the track-tightening device further includes a pressure sensor 54, the pressure sensor 54 is connected to the first oil path 50 and electrically connected to the controller 70, so as to transmit a pressure signal of the first oil path 50 detected by the pressure sensor 54 to the controller 70, and the controller 70 can control the main pump 10 according to the pressure signal. In this way, it is convenient to detect the oil pressure condition of the first oil passage 50 in time, thereby keeping the oil pressure of the hydraulic system constant.

In order to remind the operator to timely control the abnormal condition of the oil pressure in the whole hydraulic system of the track tensioning device, further, in the embodiment, the track tensioning device further comprises an alarm 80, the alarm 80 is electrically connected with the controller 70, the controller 70 can send a control signal to the alarm 80 according to the pressure signal, and the alarm 80 is used for giving an alarm according to the control signal.

In this way, the controller 70 can determine and analyze the pressure signal according to the pressure signal detected by the pressure sensor 54, and when the oil pressure in the hydraulic system of the track tensioning device is found to be abnormal, the controller can timely send a control signal to the alarm 80, so as to control the alarm 80 to send an alarm, and further remind a worker to pay attention to the timely treatment.

The alarm 80 may illustratively be an audible and visual alarm. Like this, when the abnormal conditions appeared, audible-visual annunciator can notice through the mode suggestion staff of scintillation and sound alarm to prevent that the staff from not seeing or not hearing the alarm, can strengthen the warning effect of alarm to a certain extent.

In this embodiment, in order to facilitate the control of the opening/closing of the first oil path 50, the track-tightening device further includes a control valve 55, the control valve 55 is connected to the first oil path 50 between the main pump 10 and the tensioning cylinder 20, and the control valve 55 is controlled to open or close to control the oil supply of the main pump 10 to the tensioning cylinder 20.

The control valve 55 may be, for example, a solenoid valve or a hydraulic valve.

The embodiment also provides a crawler type engineering machine, which comprises the crawler tensioning device. Since the detailed structure and the advantageous effects of the track tensioning device have been described and illustrated in detail, the detailed description thereof is omitted.

The above description is only an alternative 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.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.

In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims

1. The utility model provides a track tensioning device, its characterized in that includes main pump, tensioning hydro-cylinder and leading wheel, the inboard of track is located to the leading wheel, is used for the tensioning the track, the pole chamber that has of tensioning hydro-cylinder with the leading wheel is connected, the no pole chamber of tensioning hydro-cylinder through first oil circuit with the main pump intercommunication.

2. The track tensioning device according to claim 1, further comprising a controller, an overflow valve and an overflow detection component for detecting overflow information of the overflow valve, wherein the overflow valve is connected to the oil return path of the tensioning cylinder, the overflow detection component is electrically connected to the controller, and the controller is configured to control the running gear of the track-type engineering machine to start and stop according to the overflow information of the overflow detection component.

3. The track tensioner of claim 1, further comprising a check valve connected to the first oil passage for allowing oil to flow from the main pump to the rodless chamber of the tensioning cylinder.

4. A track tensioner according to claim 3, further comprising a pressure relief valve connected to the first oil path and located between the main pump and the one-way valve.

5. The track tensioning device of claim 1, further comprising an accumulator, the accumulator being bypass to the first oil gallery.

6. The track tensioner of claim 2, further comprising a pressure sensor, the pressure sensor being coupled to the first oil path and electrically coupled to the controller to transmit a pressure signal of the first oil path detected by the pressure sensor to the controller, the controller being operable to control the main pump based on the pressure signal.

7. The track tensioning device of claim 6, further comprising an alarm electrically connected to the controller, wherein the controller is configured to send a control signal to the alarm based on the pressure signal, and wherein the alarm is configured to send an alarm based on the control signal.

8. The track tensioner of claim 7, wherein the alarm is an audible and visual alarm.

9. The track tensioner of claim 2, further comprising a control valve connected to the first oil path between the main pump and the tensioning cylinder.

10. A track-type working machine, characterized by comprising a track-tensioning device according to any one of claims 1 to 9.