Rotary vertical shaft device of electric shovel and electric shovel

Abstract

The invention discloses a rotary vertical shaft device of an electric shovel, which comprises a rotary vertical shaft, a shaft sleeve, a rotary pinion, a bearing, a shaft end baffle fixed at the lower end of the rotary vertical shaft through a connecting bolt, and a pressure sensing system which comprises a pressure sensor, a power supply module, a wireless transmitting module and a wireless receiving module, a pressure sensor is arranged at each bolt hole in the shaft end baffle, the power module is fixed to the bottom face of the shaft end baffle, the pressure sensors are electrically connected to the power module and connected with the wireless transmitting module, the wireless receiving module is arranged on a rotary platform of the electric shovel, and the wireless transmitting module is in communication connection with the wireless receiving module. And the wireless receiving module is in communication connection with an alarm device arranged in a cab of the electric shovel. The state of the attachment bolt is monitored in real time through the pressure sensing system, when it is monitored that the attachment bolt is loosened, an alarm signal is formed in the electric shovel cab, safety accidents are avoided, and the safety of equipment is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electric shovels, and in particular relates to an electric shovel rotary vertical shaft device and an electric shovel comprising the electric shovel rotary vertical shaft device. Background Art

[0002] The electric shovel is a single-bucket excavator that uses transmission parts such as gears, chains, steel cables, and pulleys to transmit power. It is one of the main mining equipment in tens of millions of ton open-pit mines. It has high productivity, high operating rate, and low operating cost. It is a recognized model in the mining industry. The electric shovel consists of a traveling device, a rotating device, a working device, a lubrication system, an air supply system, a lifting mechanism, etc.

[0003] The slewing vertical shaft device is a key component of the electric shovel, and the reliability of the structural connection is related to the mobility of the whole machine. The inner hole of the slewing vertical shaft sleeve in the prior art is a conical surface, and it is not convenient to measure the depth of the inner hole before assembly. After the slewing pinion and the slewing vertical shaft are splined, the size of the slewing vertical shaft end baffle and the slewing vertical shaft end face cannot be measured, and the specific gap cannot be measured. The bolt connection of the slewing vertical shaft end baffle is unreliable and easy to cut off. There is no monitoring system to monitor the connection. When the slewing pinion falls off due to the shearing of the bolt, if the electric shovel is still in the slewing process, it is easy to cause a major accident, resulting in damage to the slewing pinion and the large gear ring, and bending and deformation of the slewing vertical shaft, which poses certain safety hazards. Summary of the invention

[0004] In order to solve some or all of the technical problems existing in the above-mentioned prior art, the present invention provides an electric shovel rotary vertical shaft device, which is installed on the rotary platform of the electric shovel, and the electric shovel rotary vertical shaft device includes a rotary vertical shaft, a sleeve sleeved on the outer periphery of the rotary vertical shaft, a rotary pinion arranged on the outer periphery of the lower end of the rotary vertical shaft, a bearing arranged between the rotary pinion and the sleeve and matched with the rotary vertical shaft, a shaft end baffle fixed to the lower end of the rotary vertical shaft by connecting bolts, and a pressure sensing system, wherein:

[0005] A limiting groove matching the shaft end baffle is formed at one end of the rotary pinion gear away from the shaft sleeve, the outer diameter of the shaft end baffle matches the inner diameter of the limiting groove, the shaft end baffle is embedded in the limiting groove, and a plurality of connecting bolts pass through a plurality of bolt holes formed on the shaft end baffle and are screwed on the lower end of the rotary vertical shaft;

[0006] The inner diameter of the sleeve matches the outer diameter of the rotary vertical shaft, the inner hole of the sleeve is provided with an assembly tapered hole section, the assembly tapered hole section is arranged so that the diameter gradually decreases from top to bottom, the rotary vertical shaft is provided with an assembly tapered surface section, the assembly tapered surface section is arranged so that the diameter gradually decreases from top to bottom, and the assembly tapered surface section matches the assembly tapered hole section;

[0007] A measuring hole is provided on the shaft end baffle, through which the gap between the lower end surface of the rotary vertical shaft and the shaft end baffle is measured, and a gasket is installed in the gap between the lower end surface of the rotary vertical shaft and the shaft end baffle;

[0008] The pressure sensing system includes a pressure sensor, a power module, a wireless transmitting module and a wireless receiving module. A pressure sensor is arranged at each bolt hole on the shaft end baffle. The power module is fixed on the end face of the shaft end baffle away from the shaft end of the rotary vertical shaft. Each of the pressure sensors is electrically connected to the power module, and each of the pressure sensors is connected to a wireless transmitting module. The wireless receiving module is arranged on the rotary platform of the electric shovel. The wireless transmitting module is communicatively connected to the wireless receiving module, and the wireless receiving module is communicatively connected to an alarm device arranged in the cab of the electric shovel.

[0009] Furthermore, in the above-mentioned electric shovel rotating vertical shaft device, the pressure sensor is a washer-type pressure sensor, the inner diameter of the washer of the washer-type pressure sensor matches the outer diameter of the connecting bolt, and the washer-type pressure sensor determines whether the connecting bolt is loose by monitoring the screw-out angle of the connecting bolt or the clamping force applied by the connecting bolt to the washer.

[0010] Furthermore, in the above-mentioned electric shovel rotary vertical shaft device, the gasket is provided with through holes, and the number and size of the through holes correspond to the number and size of the bolt holes provided on the shaft end baffle.

[0011] Furthermore, in the above-mentioned electric shovel rotary vertical shaft device, the number of the connecting bolts is 6 to 10, and the connecting bolts are evenly arranged in the circumferential direction around the center of the shaft end baffle.

[0012] In addition, the present invention also provides an electric shovel, which includes the above-mentioned electric shovel rotary vertical shaft device.

[0013] The electric shovel rotary vertical shaft device of the present invention has the following advantages and beneficial effects:

[0014] (1) A pressure sensing system is provided in the rotary vertical shaft device of the electric shovel of the present invention. By means of the pressure sensor provided at each bolt hole, the state of the connecting bolt can be monitored in real time. When any connecting bolt is detected to be loose, the pressure sensor corresponding to the connecting bolt transmits the signal to the wireless receiving module via the wireless transmitting module and finally transmits the signal to the alarm device, thereby generating an alarm signal in the cab of the electric shovel to remind the driver to inspect or replace the connecting bolt, thereby avoiding the safety accident of the rotating pinion falling due to the loose connecting bolt, thereby improving the safety of the equipment.

[0015] (2) In the electric shovel rotary vertical shaft device of the present invention, a measuring hole is opened on the shaft end baffle, and the gap between the shaft end of the rotary vertical shaft and the shaft end baffle can be accurately measured through the measuring hole. Therefore, an appropriate amount of gaskets can be installed according to the gap between the shaft end of the rotary vertical shaft and the shaft end baffle obtained by actual measurement, thereby ensuring a stable and reliable connection between the rotary vertical shaft and the shaft end baffle, further improving the safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0017] Figure 1 It is a schematic structural diagram of the rotary vertical shaft device of an electric shovel of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the shaft end baffle in the rotary vertical shaft device of the electric shovel of the present invention;

[0019] Figure 3 The utility model is a structural schematic diagram of a shaft sleeve in a rotary vertical shaft device of an electric shovel according to the present invention.

[0020] Description of reference numerals:

[0021] 1-rotating vertical shaft, 11-assembling cone surface section, 2-sleeve, 21-assembling cone hole section, 3-rotating pinion, 4-bearing, 5-shaft end baffle, 51-pressure sensor, 52-power module, 53-wireless transmission module, 54-measuring hole, 6-connecting bolt, 7-gasket, 100-rotating platform. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] like Figures 1 to 3As shown, the electric shovel rotary vertical shaft device of the present invention is installed on the rotary platform 100 of the electric shovel, including a rotary vertical shaft 1, a sleeve 2 sleeved on the outer periphery of the rotary vertical shaft 1, a rotary pinion 3 arranged on the outer periphery of the lower end of the rotary vertical shaft 1, a bearing 4 arranged between the rotary pinion 3 and the sleeve 2 and matched with the rotary vertical shaft 1, a shaft end baffle 5 fixed to the lower end of the rotary vertical shaft 1 by a connecting bolt 6, and a pressure sensing system.

[0024] The inner diameter of the sleeve 2 matches the outer diameter of the rotary vertical shaft 1, wherein the inner hole of the sleeve 2 is provided with an assembly tapered hole section 21, and the assembly tapered hole section 21 is arranged to gradually decrease in diameter from top to bottom, and the rotary vertical shaft 1 is provided with an assembly tapered surface section 11, and the assembly tapered surface section 11 is arranged to gradually decrease in diameter from top to bottom. The assembly tapered surface section 11 of the rotary vertical shaft 1 and the assembly tapered hole section 21 of the sleeve 2 match each other, thereby ensuring reliable assembly of the rotary vertical shaft 1 and the sleeve 2.

[0025] The lower end of the rotating pinion 3, i.e., the end away from the sleeve 2, is provided with a limiting groove matching the shaft end baffle 5. The outer diameter of the shaft end baffle 5 matches the inner diameter of the limiting groove. The shaft end baffle 5 is embedded in the limiting groove. A plurality of connecting bolts 6 pass through a plurality of bolt holes formed on the shaft end baffle 5 and are screwed on the lower end of the rotating vertical shaft 1. Thus, the rotating vertical shaft 1, the shaft end baffle 5 and the rotating pinion 3 are fixed to each other through the connecting bolts 6.

[0026] A measuring hole 54 is provided on the shaft end baffle 5. Through the measuring hole 54, a measuring tool can be used to accurately measure the gap between the lower end face of the rotary vertical shaft 1 and the shaft end baffle 5. Therefore, the required number of gaskets 7 can be installed according to the actual gap between the shaft end of the rotary vertical shaft 1 and the shaft end baffle 5, thereby ensuring that the connection between the rotary vertical shaft 1 and the shaft end baffle 5 is more stable and reliable, thereby improving the safety of the equipment.

[0027] Furthermore, the gasket 7 is provided with through holes, the number and size of the through holes correspond to the number and size of the bolt holes provided on the shaft end baffle 5 , thereby facilitating the installation of the gasket 7 in the gap between the shaft end of the rotary vertical shaft 1 and the shaft end baffle 5 .

[0028] As a specific implementation, in the electric shovel rotary vertical shaft device of the present invention, the number of the connecting bolts 6 is 6 to 10, more specifically, the number of the connecting bolts 6 is 8, and they are evenly arranged in the circumferential direction around the center of the shaft end baffle 5. Of course, the number of the connecting bolts 6 can be determined according to the specific dimensions of the rotary vertical shaft 1, the rotary pinion 3, and the shaft end baffle 5 in actual use.

[0029] The pressure sensing system in the rotary vertical shaft device of the electric shovel of the present invention includes: a pressure sensor 51, a power module 52, a wireless transmitting module 53 and a wireless receiving module. A pressure sensor 51 is arranged at each bolt hole on the shaft end baffle 5. The power module 52 is fixed on the bottom surface of the shaft end baffle 5, that is, the end surface thereof away from the shaft end of the rotary vertical shaft 1. Each pressure sensor 51 is electrically connected to the power module 52, and each pressure sensor 51 is connected to a wireless transmitting module 53. A wireless receiving module (not shown in the figure) is arranged on the rotary platform 100 of the electric shovel. The wireless transmitting module 53 is communicatively connected to the wireless receiving module, and the wireless receiving module is communicatively connected to an alarm device (not shown in the figure) arranged in the cab of the electric shovel. When the pressure sensor 51 detects that the connecting bolt 6 is loose, the pressure sensor 51 transmits the monitoring signal to the wireless receiving module through the wireless transmitting module 53 and finally transmits it to the alarm device, thereby forming an alarm signal such as a warning light and an alarm whistle in the cab of the electric shovel to remind the driver to inspect or replace the connecting bolt 6.

[0030] As a specific implementation, in the electric shovel rotary vertical shaft device of the present invention, the pressure sensor 51 can be a washer-type pressure sensor, the inner diameter of the washer of the washer-type pressure sensor matches the outer diameter of the connecting bolt 6, and the washer-type pressure sensor determines whether the connecting bolt 6 is loose by monitoring the screw-out angle of the connecting bolt 6 or the clamping force applied by the connecting bolt 6 to the washer.

[0031] In summary, compared with the prior art, the electric shovel rotary vertical shaft device of the present invention has the following advantages and beneficial effects:

[0032] (1) A pressure sensing system is provided in the slewing vertical shaft device of the electric shovel of the present invention. By means of the pressure sensor 51 provided at each bolt hole, the state of the connecting bolt 6 can be monitored in real time. When any connecting bolt 6 is detected to be loose, the pressure sensor 51 corresponding to the connecting bolt 6 transmits a signal to the wireless receiving module via the wireless transmitting module 53 and finally transmits the signal to the alarm device, thereby generating an alarm signal in the cab of the electric shovel to remind the driver to inspect or replace the connecting bolt 6, thereby avoiding the safety accident of the slewing pinion falling off due to the loosening of the connecting bolt 6, thereby improving the safety of the equipment.

[0033] (2) In the electric shovel rotary shaft device of the present invention, a measuring hole 54 is opened on the shaft end baffle 5, and the gap between the shaft end of the rotary shaft 1 and the shaft end baffle 5 can be accurately measured through the measuring hole 54. Therefore, an appropriate amount of gasket 7 can be installed according to the gap between the shaft end of the rotary shaft 1 and the shaft end baffle 5 obtained by actual measurement, thereby ensuring a stable and reliable connection between the rotary shaft 1 and the shaft end baffle 5, further improving the safety of the equipment.

[0034] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rotary vertical shaft device for an electric shovel, mounted on a rotary platform of the electric shovel, characterized in that: The electric shovel rotary vertical shaft device includes a rotary vertical shaft, a sleeve sleeved on the outer periphery of the rotary vertical shaft, a rotary pinion arranged on the outer periphery of the lower end of the rotary vertical shaft, a bearing arranged between the rotary pinion and the sleeve and matched with the rotary vertical shaft, a shaft end baffle fixed to the lower end of the rotary vertical shaft by connecting bolts, and a pressure sensing system, wherein: A limiting groove matching the shaft end baffle is formed at one end of the rotary pinion gear away from the shaft sleeve, the outer diameter of the shaft end baffle matches the inner diameter of the limiting groove, the shaft end baffle is embedded in the limiting groove, and a plurality of connecting bolts pass through a plurality of bolt holes formed on the shaft end baffle and are screwed on the lower end of the rotary vertical shaft; The inner diameter of the sleeve matches the outer diameter of the rotary vertical shaft, the inner hole of the sleeve is provided with an assembly tapered hole section, the assembly tapered hole section is arranged so that the diameter gradually decreases from top to bottom, the rotary vertical shaft is provided with an assembly tapered surface section, the assembly tapered surface section is arranged so that the diameter gradually decreases from top to bottom, and the assembly tapered surface section matches the assembly tapered hole section; A measuring hole is provided on the shaft end baffle, through which the gap between the lower end surface of the rotary vertical shaft and the shaft end baffle is measured, and a gasket is installed in the gap between the lower end surface of the rotary vertical shaft and the shaft end baffle; The pressure sensing system includes a pressure sensor, a power module, a wireless transmitting module and a wireless receiving module. A pressure sensor is arranged at each bolt hole on the shaft end baffle. The power module is fixed on the end face of the shaft end baffle away from the shaft end of the rotary vertical shaft. Each of the pressure sensors is electrically connected to the power module, and each of the pressure sensors is connected to a wireless transmitting module. The wireless receiving module is arranged on the rotary platform of the electric shovel. The wireless transmitting module is communicatively connected to the wireless receiving module, and the wireless receiving module is communicatively connected to an alarm device arranged in the cab of the electric shovel.

2. The electric shovel rotary vertical shaft device according to claim 1 is characterized in that: The pressure sensor is a washer-type pressure sensor, the inner diameter of the washer of which matches the outer diameter of the connecting bolt. The washer-type pressure sensor determines whether the connecting bolt is loose by monitoring the screw-out angle of the connecting bolt or the clamping force applied by the connecting bolt to the washer.

3. The electric shovel rotary vertical shaft device according to claim 1 is characterized in that: The gasket is provided with through holes, and the number and size of the through holes correspond to the number and size of the bolt holes provided on the shaft end baffle.

4. The electric shovel rotary vertical shaft device according to claim 1 is characterized in that: The number of the connecting bolts is 6 to 10, and the connecting bolts are evenly arranged in the circumferential direction around the center of the shaft end baffle.

5. An electric shovel, characterized in that: The electric shovel comprises the electric shovel rotary vertical shaft device according to any one of claims 1-4.

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