Automatic lubricating grease filling device and method for slewing bearing of excavator and excavator

Abstract

The invention provides an automatic lubricating grease filling device and method for a slewing bearing of an excavator and the excavator, and belongs to the field of engineering machinery. The device comprises a slewing bearing, a filling unit, a controller, a sensor and a measuring point, the outer ring of the slewing bearing is connected with a slewing platform of the excavator to form a first rotating part; the inner ring of the slewing bearing is connected with the excavator chassis to form a second rotating part; and the sensor and the measuring point are respectively arranged on the first rotating part and the second rotating part. The controller is used for obtaining the number of times that the sensor passes through the measuring point and calculating the number of rotation turns of the first rotating part and the second rotating part according to the number of times so as to control the lubricating oil pump in the filling unit. According to the invention, the actual number of rotation turns of the slewing bearing is measured by arranging the sensor and the measuring points, and the actual number of rotation turns of the slewing bearing represents the actual consumption of the lubricating grease in the raceway of the slewing bearing, so that the lubricating grease is regularly and automatically filled according to the actual consumption of the lubricating grease in the raceway of the slewing bearing.

Description

Technical Field

[0001] The present invention relates to a grease automatic filling device, a filling method and an excavator for a swing bearing of an excavator, belonging to the field of construction machinery. Background Art

[0002] During the operation of the swing bearing of an excavator, grease needs to be continuously filled to ensure that the balls are sufficiently lubricated in the raceway. The swing bearings of medium and large excavators generally fill grease automatically according to the working time. For example, a certain amount of grease is filled every 200 hours of operation of the excavator. This filling method cannot adjust the filling amount according to the actual consumption. Excessive filling will cause the grease to overflow through the swing bearing seal ring, resulting in waste; while insufficient filling will lead to insufficient lubrication of the raceway, causing wear between the balls and the raceway, thereby shortening the service life of the swing bearing. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a grease automatic filling device, a filling method and an excavator for a swing bearing of an excavator, which solves the problem that the filling amount cannot be adjusted according to the actual consumption.

[0004] To achieve the above purpose, the present invention is implemented by the following technical solutions: In the first aspect, the present invention provides a grease automatic filling device for a swing bearing of an excavator, including: a swing bearing, a filling unit, a controller, and a sensor and a measuring point that cooperate with each other; the outer ring of the swing bearing is connected to the swing platform of the excavator to form a first rotating part; the inner ring of the swing bearing is connected to the chassis of the excavator to form a second rotating part; the sensor and the measuring point are respectively arranged on the first rotating part and the second rotating part for measuring the relative number of rotation circles of the first rotating part and the second rotating part; the controller is communicatively connected to the sensor for obtaining the number of times the sensor passes through the measuring point; the filling unit includes: a lubricating oil pump, a plurality of filling heads, and a lubricating pipe connecting the lubricating oil pump and each filling head; a plurality of filling ports communicating with the raceway of the swing bearing are arranged on the periphery of the swing bearing, and the plurality of filling heads of the filling unit are respectively arranged at the filling ports; the controller is signal-connected to the lubricating oil pump for controlling the opening and closing of the lubricating oil pump.

[0005] Further, the sensor is arranged on the outer ring of the swing bearing, and the measuring point is arranged on the inner ring of the swing bearing.

[0006] Further, a plurality of measuring points are evenly distributed on the inner ring of the swing bearing.

[0007] Further, the device further includes: a slewing speed reducer installed at the bottom of the slewing platform of the excavator; the gear of the slewing speed reducer meshes with the gear of the inner ring of the slewing bearing; the sensor and the measuring point are respectively arranged on the gear of the slewing speed reducer and the gear of the inner ring of the slewing bearing.

[0008] In a second aspect, the present invention provides a lubricating grease automatic filling method for the slewing bearing of the excavator according to the first aspect, which is executed by a controller and includes: obtaining the number of times the sensor passes through the measuring point; obtaining the number of slewing circles of the relative rotation of the first rotating part and the second rotating part; controlling the opening and closing of the lubricating oil pump according to the number of slewing circles, so as to automatically fill the raceway of the slewing bearing with lubricating grease.

[0009] Further, the number of slewing circles of the relative rotation of the first rotating part and the second rotating part is calculated according to the number of times the sensor passes through the measuring point and the number of measuring points arranged on the inner ring of the slewing bearing.

[0010] Further, the number of slewing circles of the relative rotation of the first rotating part and the second rotating part is obtained by the counter cycling count, specifically: In response to the number of times the sensor passes through the measuring point being equal to the number of measuring points arranged on the inner ring of the slewing bearing, the counter accumulates once, and the number of times the sensor passes through the measuring point is cleared.

[0011] Further, controlling the opening and closing of the lubricating oil pump according to the number of slewing circles includes: in response to the number of slewing circles being an integer multiple of the preset filling number of circles, controlling the lubricating oil pump to open for a preset duration and then close.

[0012] Further, controlling the opening and closing of the lubricating oil pump according to the number of slewing circles includes: in response to the number of slewing circles being equal to the preset filling number of circles, controlling the lubricating oil pump to open for a preset duration and then close, and clearing the number of slewing circles.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are: (1) The automatic lubricating grease filling device for the slewing bearing of the excavator provided by the present invention realizes the measurement of the actual slewing circles of the slewing bearing by setting a sensor and a measuring point that cooperate with each other. The actual slewing circles of the slewing bearing represent the actual consumption of the lubricating grease in the raceway of the slewing bearing, that is, the automatic filling of the lubricating grease is realized regularly according to the actual consumption of the lubricating grease in the raceway of the slewing bearing; (2) The lubricating grease automatic filling method for the slewing bearing of the excavator provided by the present invention calculates the actual slewing circles of the slewing bearing through the number of times the sensor passes through the measuring point, and compares the actual slewing circles with the preset filling number of circles on the user interface. When the filling condition is met, the lubricating oil pump is turned on to automatically fill the raceway with lubricating grease. Description of the Drawings

[0014] Figure 1Schematic diagram of the grease automatic filling device for the slewing bearing of the excavator in Embodiment 1 of the present invention; Figure 2 Schematic diagram of the sensor and measuring point arrangement in Embodiment 1 of the present invention; In the figure: 1 - sensor, 2 - measuring point, 3 - filling head, 4 - grease pipe. Detailed implementation manners

[0015] In the description and claims of this application and the above-mentioned drawings, the terms "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments described here can be implemented in an order different from that illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices. The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments.

[0016] As is well known, a slewing bearing is a new type of mechanical component, which consists of an inner ring, an outer ring, rolling elements, etc. A slewing bearing is a large bearing that can withstand combined loads and can simultaneously withstand large axial, radial loads and overturning moments. It is an important transmission component necessary for machinery that needs to make relative rotational motion between two objects and simultaneously withstand axial force, radial force, and overturning moment. Embodiment 1

[0017] Refer to Figure 1-2 , this embodiment provides a grease automatic filling device for the slewing bearing of an excavator, including: a slewing bearing, a filling unit, a controller, and a sensor 1 and a measuring point 2 that cooperate with each other.

[0018] Specifically, the outer ring of the slewing bearing is connected to the excavator slewing platform to form a first rotating part; the inner ring of the slewing bearing is connected to the excavator chassis to form a second rotating part.

[0019] The sensor 1 and the measuring point 2 are respectively arranged on the first rotating part and the second rotating part, and the corresponding relationship is not limited. That is to say, the sensor 1 can be arranged on the first rotating part and the measuring point 2 can be arranged on the second rotating part; or the measuring point 2 can be arranged on the first rotating part and the sensor 1 can be arranged on the second rotating part. Moreover, the installation positions of the sensor 1 and the measuring point 2 only need to be able to measure the relative number of rotation circles of the first rotating part and the second rotating part, and the specific installation positions are not limited.

[0020] Reference Figure 1 , in some specific embodiments, the sensor 1 is directly installed on the outer ring of the slewing bearing, and the measuring point 2 is installed on the inner ring of the slewing bearing. When the inner and outer rings of the slewing bearing rotate relatively, the sensor 1 accumulates once every time it passes a measuring point 2.

[0021] In some other specific embodiments, the device further includes: a slewing speed reducer installed at the bottom of the slewing platform of the excavator; the gear of the slewing speed reducer meshes with the gear of the inner ring of the slewing bearing; the sensor 1 and the measuring point 2 are respectively arranged on the gear of the slewing speed reducer and the gear of the inner ring of the slewing bearing.

[0022] The filling unit includes: a lubricating oil pump, a plurality of filling heads 3, and a lubricating pipe 4 connecting the lubricating oil pump and each filling head 3; a plurality of filling ports communicating with the raceway of the slewing bearing are provided on the periphery of the slewing bearing, and the plurality of filling heads 3 of the filling unit are respectively arranged at the filling ports.

[0023] The controller is respectively connected to the sensor 1 and the lubricating oil pump in signal for obtaining the number of times the sensor 1 passes through the measuring point 2, and for issuing instructions to control the opening and closing of the lubricating oil pump.

[0024] In some specific embodiments, a plurality of measuring points 2 are evenly distributed on the inner ring of the slewing bearing.

[0025] Reference Figure 2 , 6 measuring points 2 are evenly distributed on the inner ring of the slewing bearing. Embodiment 2

[0026] This embodiment provides a filling method for the grease automatic filling device of the slewing bearing of the excavator described in Embodiment 1, and this method is executed by the controller. The method includes the following steps: Step 1: Obtain the number of times the sensor 1 passes through the measuring point 2.

[0027] Step 2: Obtain the relative number of rotation circles of the first rotating part and the second rotating part.

[0028] In some specific embodiments, the relative number of revolutions of the first rotating part and the second rotating part is calculated based on the number of times the sensor 1 passes through the measuring point 2 and the number of measuring points set on the inner ring of the slewing bearing. Specifically, it is: calculating the quotient of the number of times the sensor 1 passes through the measuring point 2 divided by the number of measuring points set on the inner ring of the slewing bearing, which is the relative number of revolutions of the first rotating part and the second rotating part.

[0029] In some other specific embodiments, the relative number of revolutions of the first rotating part and the second rotating part is obtained by the counter's cyclic counting. Specifically, whenever the number of times N1 that the sensor 1 passes through the measuring point 2 is equal to the number of measuring points N2 set on the inner ring of the slewing bearing, the counter accumulates the number of revolutions N3 once, and clears the number of times the sensor 1 passes through the measuring point 2, and cyclically counts periodically to obtain the relative number of revolutions of the first rotating part and the second rotating part.

[0030] Step 3: Control the opening and closing of the lubricating oil pump according to the number of revolutions to automatically inject grease into the raceway of the slewing bearing.

[0031] In some specific embodiments, when the number of revolutions is an integer multiple of the preset injection number of revolutions, control the lubricating oil pump to open for a preset duration and then close.

[0032] In some other specific embodiments, whenever the number of revolutions is equal to the preset injection number of revolutions N, control the lubricating oil pump to open for a preset duration and then close, and clear the number of revolutions N3 and start counting again.

[0033] This method calculates the actual number of revolutions of the slewing bearing by the number of times the sensor 1 passes through the measuring point 2, thereby concretely presenting the actual consumption of the grease of the slewing bearing, and presetting the injection number of revolutions in the user interface according to experience. When the relative number of revolutions of the first rotating part and the second rotating part reaches the preset injection number of revolutions each time, the lubricating oil pump is turned on to inject grease into the raceway, realizing automatic grease injection on demand.

[0034] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An automatic grease filling device for a swing bearing of an excavator, characterized in that, Comprising: A slewing bearing, a filling unit, a controller, as well as sensors and measuring points that cooperate with each other; The outer ring of the slewing bearing is connected to the slewing platform of the excavator to form a first rotating part; the inner ring of the slewing bearing is connected to the chassis of the excavator to form a second rotating part; The sensors and measuring points are respectively arranged on the first rotating part and the second rotating part for measuring the relative number of slewing circles of the first rotating part and the second rotating part; The controller is communicatively connected to the sensor; The filling unit includes: a lubricating oil pump, a plurality of filling heads, and a lubricating pipe connecting the lubricating oil pump and each filling head; A plurality of filling ports communicating with the raceway of the slewing bearing are arranged on the periphery of the slewing bearing, and the plurality of filling heads of the filling unit are respectively arranged at the filling ports; The controller is signal-connected to the lubricating oil pump.

2. The automatic grease filling device for the swing bearing of an excavator according to claim 1, wherein, The sensor is arranged on the outer ring of the slewing bearing, and the measuring point is arranged on the inner ring of the slewing bearing.

3. The automatic grease filling device for the slewing bearing of an excavator according to claim 2, characterized in that, A plurality of measuring points are evenly distributed on the inner ring of the slewing bearing.

4. The automatic grease filling device for the swing bearing of an excavator according to claim 1, wherein, Further comprising: A slewing speed reducer installed at the bottom of the slewing platform of the excavator; The gear of the slewing speed reducer meshes with the gear of the inner ring of the slewing bearing; The sensors and measuring points are respectively arranged on the gear of the slewing speed reducer and the gear of the inner ring of the slewing bearing.

5. A lubricating grease automatic filling method for the slewing bearing of an excavator according to any one of claims 1-4, characterized in that, The method is executed by the controller and includes: Obtaining the number of times the sensor passes through the measuring point; Obtaining the relative number of slewing circles of the first rotating part and the second rotating part; Controlling the opening and closing of the lubricating oil pump according to the number of slewing circles to automatically fill the raceway of the slewing bearing with grease.

6. The filling method according to claim 5, characterized in that, Calculating the relative number of slewing circles of the first rotating part and the second rotating part according to the number of times the sensor passes through the measuring point and the number of measuring points arranged on the inner ring of the slewing bearing.

7. The filling method according to claim 5, characterized in that Obtaining the relative number of slewing circles of the first rotating part and the second rotating part by cyclic counting of a counter, specifically: In response to the number of times the sensor passes through the measuring point being equal to the number of measuring points arranged on the inner ring of the slewing bearing, the counter accumulates once, and the number of times the sensor passes through the measuring point is cleared.

8. The filling method according to claim 6 or 7, characterized in that, Controlling the opening and closing of the lubricating oil pump according to the number of slewing circles includes: in response to the number of slewing circles being an integer multiple of a preset filling number of circles, controlling the lubricating oil pump to open for a preset duration and then close.

9. The filling method according to claim 7, characterized in that Controlling the opening and closing of the lubricating oil pump according to the number of slewing circles includes: in response to the number of slewing circles being equal to the preset filling number of circles, controlling the lubricating oil pump to open for a preset duration and then close, and clearing the number of slewing circles.

10. An excavator, characterized in that, Including the automatic grease filling device for the slewing bearing of the excavator according to any one of claims 1-4.

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