Electric shovel pushing rack automatic running-in detection device and control method

Abstract

The invention belongs to the technical field of electric shovels, and particularly relates to an automatic running-in detection device for an electric shovel pushing rack and a control method.The automatic running-in detection device for the electric shovel pushing rack comprises an electric shovel vehicle body, a cab is installed on the electric shovel vehicle body, a running-in control system is arranged in the cab, and a movable arm is installed on the electric shovel vehicle body; a lifting mechanism is mounted on the movable arm; the shovel further comprises a saddle and a shovel rod; the saddle is installed on the movable arm, a gear is rotationally connected to the saddle, and a vibration sensor is installed on the saddle. According to the invention, a driver only needs to operate a corresponding instruction to realize running-in of the pushing rack on the shovel rod, so that the labor burden of the driver can be reduced; the magnitude of the vibration amplitude on the shovel rod can be detected in real time through the arranged vibration sensor, and the running-in degree of the pushing and pressing rack is judged according to the magnitude of the vibration amplitude of the shovel rod, so that the running-in effect of the pushing and pressing rack is guaranteed, and the influence on subsequent use of the pushing and pressing rack is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of electric shovels, and in particular relates to an automatic running-in detection device and a control method for an electric shovel push rack. Background Art

[0002] Electric shovel, also known as rope shovel, cable shovel or mechanical electric excavator, is a single bucket excavator that uses gears, chains, cable pulleys and other transmission parts to transmit power. Electric shovel has high productivity and low cost, and plays an important role in large open-pit mining. Figure 8 As shown, the electric shovel is mainly composed of a walking device, a rotating device, a working device, a lubrication system and an air supply system. Among them, the working device mainly includes a boom, a shovel bar, a bucket and a lifting wire rope. The shovel bar is one of the main components in the excavation process of the electric shovel. Its function is to connect and support the bucket and transmit the pushing effect to the bucket. The bucket completes the excavation of materials under the combined action of pushing and lifting forces.

[0003] Some electric shovels (such as WK series electric shovels) use the gear-rack pushing method. Compared with the flexible pushing of wire rope, the electric shovel bucket with gear-rack pushing structure has a large impact force and good cutting effect. It is suitable for working environments with poor explosion resistance, poor looseness, many roots, and many large pieces. In order to constrain the standard movement of the rack within the design range, the tooth part needs to be half placed in the guide rail when the rack is meshing, which means that the tooth shape of the rack cannot be processed by tooth shape processing machine tools, and can only be cast or forged.

[0004] At present, most electric shovels with gear-rack pushing structures use heavy-duty high-manganese steel cast racks with good weldability and alloy steel forged gears. However, due to the low meshing accuracy of cast teeth, the noise is loud when the gears are meshing, the life is short, and broken teeth often occur, which leads to the frequent replacement of the pushing rack. The newly replaced pushing rack also needs to be run-in to reduce vibration in order to extend the service life of the pushing rack. However, the running-in of the pushing rack of the existing electric shovel is mainly achieved by the driver operating the main command controller to make the pushing shovel rod reciprocate, and relying on experience to run-in the rack on the shovel rod. This is not only boring and time-consuming, but also easily increases the labor intensity of the electric shovel driver, and there are also problems such as poor running-in effect and low precision of the pushing rack, which in turn affects the subsequent use of the pushing rack.

[0005] Therefore, in view of the above technical problems, it is necessary to provide an automatic running-in detection device and control method for an electric shovel push rack.

[0006] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0007] The object of the present invention is to provide an automatic running-in detection device and control method for an electric shovel push rack, which can solve the problem that the electric shovel push rack needs to rely on the driver's experience for running-in.

[0008] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows:

[0009] An automatic running-in detection device for a push rack of an electric shovel comprises an electric shovel body, a cab is installed on the electric shovel body, a running-in control system is arranged in the cab, a boom is installed on the electric shovel body, a lifting mechanism is installed on the boom, and further comprises: a saddle and a shovel bar;

[0010] The saddle is mounted on the boom, a gear is rotatably connected to the saddle, a vibration sensor is mounted on the saddle, and both the gear and the vibration sensor are connected to the running-in control system;

[0011] The shovel rod is installed on the side wall of the boom and passes through the saddle. A rack is installed on the shovel rod, and the rack is meshed with the gear. Teeth are connected to both ends of the rack. A pair of anti-collision mechanisms are also installed on the shovel rod, and the pair of anti-collision mechanisms are respectively arranged on both sides of the saddle. A bucket is installed on the shovel rod, and the bucket is connected to the lifting mechanism.

[0012] In one or more embodiments of the present invention, the running-in control system includes a PLC controller and an operation panel, the PLC controller is electrically connected to the operation panel, and a logic language is programmed into the PLC controller, thereby controlling the rotation state of the gear;

[0013] The gear and the vibration sensor are electrically connected to the PLC controller. The driver can control the operation of the gear by controlling the operation panel. The detection result of the vibration sensor on the saddle will be fed back to the PLC controller and the display screen of the operation panel for the driver to view.

[0014] In one or more embodiments of the present invention, the operation panel is provided with a display screen, and the display screen is used to display the detection result of the vibration sensor;

[0015] If the vibration sensor detects that the vibration frequency of the saddle is consistent, it means that the gear and rack are running-in smoothly, and the driver does not need to manually control the operation panel; if the vibration sensor detects that the vibration frequency of the saddle is inconsistent, it means that the rack is partially running-in unevenly, and the driver needs to manually control the operation panel.

[0016] In one or more embodiments of the present invention, the running-in control system also includes an alarm, which is installed in the cab and operates with the PLC controller. The alarm will only sound an alarm when the vibration sensor detects that the vibration frequency of the saddle is inconsistent, to remind the driver that there is an inconsistency in the running-in of the rack and that manual operation is required to run-in the rack.

[0017] In one or more embodiments of the present invention, the lifting mechanism includes a sheave mounted on the boom, a lifting wire rope is provided on the sheave, one end of the lifting wire rope is connected to the bucket, and the lifting wire rope is used to lift or lower the bucket.

[0018] In one or more embodiments of the present invention, a winding drum is installed in the body of the electric shovel, and a winding motor is installed on the winding drum. The winding motor is electrically connected to the PLC controller, and the other end of the lifting wire rope is wound on the winding drum. When the winding motor is running, the winding motor can drive the winding drum to rotate. The winding drum can be used to wind or release the lifting wire rope, and then the bucket can be raised or lowered.

[0019] In one or more embodiments of the present invention, an auxiliary lubrication mechanism is installed on the saddle. When the rack is unevenly run-in, the auxiliary lubrication mechanism can be used to lubricate the gear and the rack to avoid excessive wear of the gear and the rack.

[0020] The auxiliary lubrication mechanism includes an oil storage tank and a straight pipe, both of which are installed on the saddle. Lubricating oil and an oil pump are arranged in the oil storage tank. A delivery pipe is connected to the output end of the oil pump, and the delivery pipe is communicated with the straight pipe. The oil pump is electrically connected to the PLC controller. A plurality of nozzles are installed on the straight pipe, and the nozzles correspond to the gears. When the oil pump is running, the oil pump can extract the lubricating oil in the oil storage tank, deliver the lubricating oil to the straight pipe through the delivery pipe, and then use a plurality of nozzles to spray the lubricating oil to the gears, so as to achieve the effect of lubricating the gears and the racks, which can not only avoid excessive wear of the gears and the racks, but also avoid waste of lubricating oil.

[0021] When the driver is performing manual control, he first uses the auxiliary lubrication mechanism to spray lubricating oil to the rack where the vibration is abnormal. If the vibration abnormality disappears, the gear and rack continue to run-in smoothly, and the driver does not need manual control. If the vibration abnormality does not disappear, the driver continues to manually control and continues to run-in the rack where the vibration abnormality occurs until the vibration abnormality disappears.

[0022] In one or more embodiments of the present invention, the anti-collision mechanism includes a column, which is installed on the shovel rod. A sliding rod is slidably connected to the column. A contact plate and an anti-slip plate are respectively connected to both ends of the sliding rod. The contact plate corresponds to the saddle. When the shovel rod moves to one side, the saddle can contact the contact plate and perform buffering under the action of the spring to avoid direct contact between the gear and the teeth, thereby protecting the gear.

[0023] In one or more embodiments of the present invention, a spring is provided between the upright post and the contact plate, and the spring is provided outside the slide bar. The spring can be used to buffer the impact force on the contact plate, thereby preventing the saddle from being hit hard and ensuring the safety of the saddle.

[0024] The contact plate is provided with a buffer pad, which can protect the saddle and the contact plate and prevent the saddle and the contact plate from being damaged due to impact.

[0025] A control method for an automatic running-in detection device for an electric shovel push rack comprises the following steps:

[0026] S1. Logical language is programmed into the PLC controller. The driver uses the operation panel in the cab to control the running-in of the gear and rack. First, the minimum load running-in is performed, and the lifting mechanism is started to make the shovel rod in a horizontal state.

[0027] S2, close the lifting mechanism and control the gear to rotate. Since the gear and the rack are meshed with each other, when the gear rotates, the shovel bar can move. When the saddle contacts one of the anti-collision mechanisms, the gear immediately rotates in the opposite direction automatically, causing the shovel bar to move in the opposite direction. When the saddle contacts the other anti-collision mechanism, the gear automatically rotates in the opposite direction again, causing the shovel bar to move in the opposite direction again. This repeated movement can achieve the running-in of the gear and the rack.

[0028] S3. When the shovel bar moves, the vibration sensor can detect the vibration of the saddle. If the vibration sensor detects that the vibration frequency of the saddle is consistent, it indicates that the gear and the rack are running-in smoothly. At this time, the rotation speed of the gear is increased to speed up the movement speed of the shovel bar until the rated speed of the shovel bar is reached. The rotation speed of the gear is gradually increased from 30% of the rated speed.

[0029] S4. If the vibration sensor detects that the vibration frequency of the saddle is inconsistent, it indicates that the rack is partially unevenly run-in. The driver needs to manually control the operation panel. When the driver performs manual control, the auxiliary lubrication mechanism is first used to spray lubricating oil on the rack with abnormal vibration. If the abnormal vibration disappears, the gear and rack continue to run-in smoothly, and the driver does not need manual control; if the abnormal vibration does not disappear, the driver continues to manually control and continuously runs in the rack with abnormal vibration until the abnormal vibration disappears;

[0030] S5. When the vibration amplitude of the saddle is less than the standard value, it is judged that the minimum load running-in is completed, and the lifting mechanism is controlled to operate to raise or lower the angle of the bucket, wherein the raising angle range of the bucket is 0-15°, and the lowering angle of the bucket is 0-90°;

[0031] S6. Repeat the operations of S1-S4, that is, the gear and the rack can be run-in from different angles until the vibration of the saddle detected by the vibration sensor reaches an optimal state, and the running-in of the gear and the rack is completed.

[0032] Compared with the prior art, the present invention provides an automatic running-in detection device and control method for an electric shovel pushing rack. The driver only needs to operate the corresponding instructions to realize the running-in of the pushing rack on the shovel bar, thereby reducing the driver's labor burden. The vibration sensor is arranged to detect the magnitude of the vibration amplitude on the shovel bar in real time, and the running-in degree of the pushing rack is judged according to the magnitude of the vibration amplitude of the shovel bar, so as to ensure the running-in effect of the pushing rack and avoid affecting the subsequent use of the pushing rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a schematic diagram from a first angle of an automatic running-in detection device for a push rack of an electric shovel according to an embodiment of the present invention;

[0035] Figure 2 It is a partial structural schematic diagram of an automatic running-in detection device for an electric shovel push rack in one embodiment of the present invention;

[0036] Figure 3 for Figure 2 Schematic diagram of the structure at A in the middle;

[0037] Figure 4 for Figure 2 Schematic diagram of the structure at B in the middle;

[0038] Figure 5 It is a second angle schematic diagram of an automatic running-in detection device for an electric shovel push rack in one embodiment of the present invention;

[0039] Figure 6 A schematic diagram from a third angle of an automatic running-in detection device for an electric shovel push rack according to an embodiment of the present invention;

[0040] Figure 7It is a flow chart of the use of an automatic running-in detection device for an electric shovel push rack in one embodiment of the present invention;

[0041] Figure 8 It is a schematic diagram of the structure of an electric shovel in the prior art.

[0042] Description of main reference numerals:

[0043] 1-electric shovel body, 101-boom, 102-lifting wire rope, 2-saddle, 201-gear, 202-vibration sensor, 203-oil storage tank, 204-straight pipe, 205-conveying pipe, 206-sprinkler, 3-shovel rod, 301-rack, 302-teeth, 303-column, 304-slide bar, 305-contact plate, 306-anti-slip plate, 307-spring, 308-buffer pad, 309-bucket. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. 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 creative work should fall within the scope of protection of the present invention.

[0045] like Figures 1 to 6 As shown, an automatic running-in detection device for an electric shovel push rack in one embodiment of the present invention includes an electric shovel body 1, a saddle 2 and a shovel rod 3.

[0046] Preferably, the electric shovel body 1 is a WK series electric shovel, which adopts a pushing method of gear 201-rack 301, the control system adopts a PLC controller for logic control, and the display screen can exchange human-machine information.

[0047] Among them, a cab is installed on the electric shovel body 1, and a running-in control system is arranged in the cab. The running-in control system can automatically control the gear 201 and the rack 301 to run in, without the driver's reciprocating boring manual operation, thereby reducing the driver's burden.

[0048] In addition, the running-in control system includes a PLC controller and an operation panel. The PLC controller is electrically connected to the operation panel. A logic language is programmed into the PLC controller, and the logic language can be used to control the gear 201 and the rack 301 to automatically run-in.

[0049] Specifically, a display screen is provided on the operation panel, and the display screen is used to display the detection result of the vibration sensor 202 on the vibration of the saddle 2: if the vibration sensor 202 detects that the vibration frequency of the saddle 2 is consistent, it indicates that the gear 201 and the rack 301 are running-in smoothly, and the driver does not need to manually control the operation panel. If the vibration sensor 202 detects that the vibration frequency of the saddle 2 is inconsistent, such as the vibration sensor 202 detects that the vibration frequency of the saddle 2 has low, high, and low values, it indicates that the rack 301 has an uneven running-in problem, that is, the rack 301 at the high-frequency vibration is convex, and the driver needs to manually control the operation panel to run-in at that place.

[0050] In addition, the running-in control system also includes an alarm, which is installed in the cab and operates with the PLC controller. Only when the vibration sensor 202 detects that the vibration frequency of the saddle 2 is inconsistent, the alarm will sound an alarm to remind the driver that the rack 301 has a running-in inconsistency, so that manual intervention can be carried out in time to ensure the running-in effect of the rack 301.

[0051] like Figures 1 to 6 As shown, a boom 101 is installed on the electric shovel body 1, and the boom 101 is used to install a saddle 2, a shovel bar 3 and a bucket 309.

[0052] A lifting mechanism is installed on the movable arm 101 , and the angle of the bucket 309 can be raised or lowered by the lifting mechanism to facilitate the use of the bucket 309 .

[0053] In addition, the lifting mechanism includes a sheave installed on the boom 101 , on which a lifting wire rope 102 is provided, one end of which is connected to the bucket 309 , and the lifting wire rope 102 is used to lift or lower the bucket 309 .

[0054] Specifically, a winding drum is installed in the electric shovel body 1, and a winding motor is installed on the winding drum. The winding motor is electrically connected to the PLC controller, and the other end of the lifting wire rope 102 is wound on the winding drum. When the winding motor is running, the winding motor can drive the winding drum to rotate, and the lifting wire rope 102 can be wound or released by the winding drum, so that the bucket 309 can be raised or lowered.

[0055] Preferably, the winding motor is a servo motor that can rotate in forward and reverse directions.

[0056] In addition, a lubrication system is provided in the electric shovel body 1, and the lubrication system is connected to the PLC controller. When the gear 201 and the rack 301 are automatically run-in, the lubrication system can lubricate the gear 201 and the rack 301 to avoid excessive wear of the gear 201 and the rack 301.

[0057] like Figures 1 to 6As shown, the saddle 2 is mounted on the boom 101, and the saddle 2 is used to mount the shovel bar 3, and a gear 201 is rotatably connected to the saddle 2. When the gear 201 rotates, the gear 201 can drive the shovel bar 3 to move through the meshing action with the rack 301, so as to control the movement of the bucket 309.

[0058] Preferably, the rotation speed of the gear 201 can be controlled by a PLC controller so that the gear 201 and the rack 301 can be better run-in.

[0059] Among them, a vibration sensor 202 is installed on the saddle 2. The vibration sensor 202 can detect the vibration amplitude of the saddle 2 in real time, and feed back the detection result to the PLC controller and the display screen of the operation panel. The PLC controller can judge the degree of running-in of the gear 201 and the rack 301 according to the vibration amplitude of the saddle 2, so as to achieve the purpose of automatic running-in of the rack 301, which solves the problem that the driver needs to perform boring reciprocating manual operations when running-in the rack 301 in the past.

[0060] In addition, the gear 201 and the vibration sensor 202 are electrically connected to the PLC controller. The driver can control the operating status of the gear 201 by controlling the operation panel. The detection result of the vibration sensor 202 on the saddle 2 will be fed back to the PLC controller and the display screen of the operation panel for the driver to view.

[0061] like Figures 1 to 6 As shown, an auxiliary lubrication mechanism is installed on the saddle 2. When the rack 301 is unevenly run-in, the auxiliary lubrication mechanism can be used to lubricate the gear 201 and the rack 301 to avoid excessive wear of the gear 201 and the rack 301, and also to avoid waste of lubricating oil.

[0062] Among them, the auxiliary lubrication mechanism includes an oil storage tank 203 and a straight pipe 204, both of which are installed on the saddle 2. The oil storage tank 203 is provided with lubricating oil and an oil pump. The output end of the oil pump is connected to a delivery pipe 205, which is connected to the straight pipe 204. The oil pump is electrically connected to the PLC controller. A plurality of nozzles 206 are installed on the straight pipe 204, and the nozzles 206 correspond to the gears 201.

[0063] When the oil pump is running, the oil pump can extract the lubricating oil in the oil storage tank 203, deliver the lubricating oil to the straight pipe 204 through the delivery pipe 205, and then use a plurality of nozzles 206 to spray the lubricating oil to the gear 201 to achieve the purpose of lubricating the gear 201 and the rack 301, which can not only avoid excessive wear of the gear 201 and the rack 301, but also avoid waste of lubricating oil.

[0064] When the driver performs manual control, he first uses the auxiliary lubrication mechanism to spray lubricating oil to the rack 301 with abnormal vibration. If the abnormal vibration disappears, the gear 201 and the rack 301 continue to run-in smoothly, and the driver does not need manual control. If the abnormal vibration does not disappear, the driver continues to manually control and continuously runs-in the rack 301 with the abnormal vibration until the abnormal vibration disappears.

[0065] like Figures 1 to 6 As shown, the shovel handle 3 is installed on the side wall of the boom 101 and passes through the saddle 2 . The shovel handle 3 is used to connect and support the bucket 309 .

[0066] A rack 301 is installed on the shovel rod 3, and the rack 301 is meshed with the gear 201. When the gear 201 rotates, the meshing action of the rack 301 can drive the shovel rod 3 and the saddle 2 to move relative to each other.

[0067] In addition, teeth 302 are connected to both ends of the rack 301 , and the teeth 302 are used to limit the gear 201 to prevent the gear 201 from completely sliding out of the rack 301 .

[0068] like Figures 1 to 6 As shown, a pair of anti-collision mechanisms are also installed on the shovel rod 3, and the pair of anti-collision mechanisms are respectively arranged on both sides of the saddle 2, and the distance between the pair of anti-collision mechanisms is smaller than the distance between the pair of teeth 302. The anti-collision mechanism can protect the gear 201 and the teeth 302 to prevent the gear 201 from colliding with the teeth 302, so as to ensure the safety of the gear 201 and the teeth 302.

[0069] The anti-collision mechanism includes a column 303, which is mounted on the shovel rod 3, and a slide bar 304 is slidably connected to the column 303. The two ends of the slide bar 304 are respectively connected to a contact plate 305 and an anti-slip plate 306, and the contact plate 305 corresponds to the saddle 2. When the shovel rod 3 moves to one side, the saddle 2 can contact the contact plate 305, and the spring 307 can be used for buffering to prevent the gear 201 from colliding with the tooth 302, thereby protecting the gear 201 and the tooth 302.

[0070] In addition, a spring 307 is provided between the upright post 303 and the contact plate 305, and the spring 307 is provided outside the slide bar 304. The spring 307 can be used to buffer the impact force received by the contact plate 305, thereby preventing the saddle 2 from being hit hard and ensuring the safety of the saddle 2.

[0071] Specifically, a buffer pad 308 is installed on the contact plate 305 to protect the saddle 2 and the contact plate 305 and prevent the saddle 2 and the contact plate 305 from being damaged due to impact.

[0072] In addition, a bucket 309 is installed on the shovel rod 3, and the bucket 309 is connected to the lifting mechanism. The bucket 309 is used to dig materials.

[0073] When the present invention is running-in the gear 201 and the rack 301, the gear 201 starts running at a low speed, and gradually increases the running-in speed according to the vibration detection value of the vibration sensor 202 until the maximum speed of the shovel bar 3 is reached, and the running-in of the gear 201 and the rack 301 under the load is completed. Then, the angle of the shovel bar 3 is adjusted, and the gear 201 and the rack 301 can be run-in multiple times from different angles, greatly improving the running-in effect of the gear 201 and the rack 301.

[0074] like Figure 7 As shown, a control method for an automatic running-in detection device for an electric shovel push rack comprises the following steps:

[0075] S1. Logical language is programmed into the PLC controller. The driver uses the operation panel in the cab to control the running-in of the gear 201 and the rack 301. First, the minimum load running-in is performed, and the lifting mechanism is started to make the shovel rod 3 in a horizontal state. Figure 1 As shown;

[0076] S2, close the lifting mechanism, control the gear 201 to rotate, because the gear 201 and the rack 301 are meshed with each other, when the gear 201 rotates, the shovel rod 3 can move, when the saddle 2 contacts one of the anti-collision mechanisms, the gear 201 immediately rotates in the opposite direction automatically, so that the shovel rod 3 moves in the opposite direction, when the saddle 2 contacts the other anti-collision mechanism, the gear 201 rotates in the opposite direction automatically again, so that the shovel rod 3 moves in the opposite direction again, and the gear 201 and the rack 301 are automatically run-in by repeating the movement. In the above process, the lubrication system is started;

[0077] S3. When the shovel bar 3 moves, the vibration sensor 202 can detect the vibration of the saddle 2. If the vibration sensor 202 detects that the vibration frequency of the saddle 2 is consistent, it indicates that the gear 201 and the rack 301 are running-in smoothly. At this time, the rotation speed of the gear 201 is increased to speed up the movement speed of the shovel bar 3 until the rated speed of the shovel bar 3 is reached, wherein the rotation speed of the gear 201 is gradually increased from 30% of the rated speed;

[0078] S4. If the vibration sensor 202 detects that the vibration frequency of the saddle 2 is inconsistent, it indicates that the rack 301 is partially unevenly run-in. The driver needs to manually control the operation panel. When the driver performs manual control, the auxiliary lubrication mechanism is first used to spray lubricating oil on the rack 301 with abnormal vibration. If the abnormal vibration disappears, the gear 201 and the rack 301 continue to run-in smoothly, and the driver does not need manual control; if the abnormal vibration does not disappear, the driver continues to manually control and continuously runs in the rack 301 with abnormal vibration until the abnormal vibration disappears;

[0079] S5. When the vibration amplitude of the saddle 2 is less than the standard value, it is determined that the minimum load running-in is completed, and the lifting mechanism is controlled to operate to increase or lower the angle of the bucket 309, such as Figure 5 and Figure 6 As shown, the lifting angle range of the bucket 309 is 0-15°, and the lowering angle of the bucket 309 is 0-90°;

[0080] S6. Repeat the operations of S1-S4, that is, the gear 201 and the rack 301 can be run-in from different angles until the vibration of the saddle 2 detected by the vibration sensor 202 reaches an optimal state, and the running-in of the gear 201 and the rack 301 is completed.

[0081] The method makes up for the shortcomings of the prior art and improves the control system of the electric shovel body 1. The method is not only applicable to the running-in of the rack 301 of the WK full series electric shovel, but also can be used for the running-in of the large gear ring in the slewing device.

[0082] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0083] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic running-in detection device for a push rack of an electric shovel, comprising an electric shovel body, a cab installed on the electric shovel body, a running-in control system arranged in the cab, a boom installed on the electric shovel body, a lifting mechanism installed on the boom, characterized in that: Also includes: A saddle is mounted on the boom, a gear is rotatably connected to the saddle, a vibration sensor is mounted on the saddle, and both the gear and the vibration sensor are connected to the running-in control system; A shovel rod is installed on the side wall of the boom and passes through the saddle. A rack is installed on the shovel rod, and the rack is meshed with the gear. Teeth are connected to both ends of the rack. A pair of anti-collision mechanisms are also installed on the shovel rod, and the pair of anti-collision mechanisms are respectively arranged on both sides of the saddle. A bucket is installed on the shovel rod, and the bucket is connected to the lifting mechanism.

2. The automatic running-in detection device for the electric shovel push rack according to claim 1 is characterized in that: The running-in control system includes a PLC controller and an operation panel, the PLC controller is electrically connected to the operation panel, and the gear and the vibration sensor are both electrically connected to the PLC controller.

3. The automatic running-in detection device for the electric shovel push rack according to claim 2 is characterized in that: The operation panel is provided with a display screen, and the display screen is used to display the detection result of the vibration sensor; If the vibration sensor detects that the vibration frequency of the saddle is consistent, it means that the gear and rack are running-in smoothly, and the driver does not need to manually control the operation panel; if the vibration sensor detects that the vibration frequency of the saddle is inconsistent, it means that the rack is partially running-in unevenly, and the driver needs to manually control the operation panel.

4. The automatic running-in detection device for the electric shovel push rack according to claim 3 is characterized in that: The running-in control system also includes an alarm, which is installed in the cab and operates with the PLC controller. The alarm will sound an alarm only when the vibration sensor detects that the vibration frequency of the saddle is inconsistent.

5. The automatic running-in detection device for the electric shovel push rack according to claim 4 is characterized in that: The lifting mechanism comprises a sheave which is mounted on the boom, a lifting wire rope is arranged on the sheave, and one end of the lifting wire rope is connected to the bucket.

6. The automatic running-in detection device for the electric shovel push rack according to claim 5 is characterized in that: A winding drum is installed in the electric shovel body, a winding motor is installed on the winding drum, the winding motor is electrically connected to the PLC controller, and the other end of the lifting wire rope is wound on the winding drum.

7. The automatic running-in detection device for the electric shovel push rack according to claim 6 is characterized in that: An auxiliary lubrication mechanism is installed on the saddle, and the auxiliary lubrication mechanism includes an oil storage tank and a straight pipe, and the oil storage tank and the straight pipe are both installed on the saddle. Lubricating oil and an oil pump are arranged in the oil storage tank, and a delivery pipe is connected to the output end of the oil pump, and the delivery pipe is connected to the straight pipe. The oil pump is electrically connected to the PLC controller, and a plurality of nozzles are installed on the straight pipe, and the nozzles correspond to the gears; When the driver is performing manual control, he first uses the auxiliary lubrication mechanism to spray lubricating oil to the rack where the vibration is abnormal. If the vibration abnormality disappears, the gear and rack continue to run-in smoothly, and the driver does not need manual control. If the vibration abnormality does not disappear, the driver continues to manually control and continues to run-in the rack where the vibration abnormality occurs until the vibration abnormality disappears.

8. The automatic running-in detection device for the electric shovel push rack according to claim 1 is characterized in that: The anti-collision mechanism comprises a column, which is mounted on the shovel rod, a sliding rod is slidably connected to the column, and a contact plate and an anti-slip plate are respectively connected to both ends of the sliding rod, and the contact plate corresponds to the saddle.

9. The automatic running-in detection device for the electric shovel push rack according to claim 8 is characterized in that: A spring is arranged between the column and the contact plate, the spring is arranged outside the slide bar, and a buffer pad is installed on the contact plate.

10. A control method for the automatic running-in detection device for the electric shovel push rack according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Logical language is programmed into the PLC controller. The driver uses the operation panel in the cab to control the running-in of the gear and rack. First, the minimum load running-in is performed, and the lifting mechanism is started to make the shovel rod in a horizontal state. S2, close the lifting mechanism and control the gear to rotate. Since the gear and the rack are meshed with each other, when the gear rotates, the shovel bar can move. When the saddle contacts one of the anti-collision mechanisms, the gear immediately rotates in the opposite direction automatically, causing the shovel bar to move in the opposite direction. When the saddle contacts the other anti-collision mechanism, the gear automatically rotates in the opposite direction again, causing the shovel bar to move in the opposite direction again. This repeated movement can achieve the running-in of the gear and the rack. S3. When the shovel bar moves, the vibration sensor can detect the vibration of the saddle. If the vibration sensor detects that the vibration frequency of the saddle is consistent, it indicates that the gear and the rack are running-in smoothly. At this time, the rotation speed of the gear is increased to speed up the movement speed of the shovel bar until the rated speed of the shovel bar is reached. The rotation speed of the gear is gradually increased from 30% of the rated speed. S4. If the vibration sensor detects that the vibration frequency of the saddle is inconsistent, it indicates that the rack is partially unevenly run-in. The driver needs to manually control the operation panel. When the driver performs manual control, the auxiliary lubrication mechanism is first used to spray lubricating oil on the rack with abnormal vibration. If the abnormal vibration disappears, the gear and rack continue to run-in smoothly, and the driver does not need manual control; if the abnormal vibration does not disappear, the driver continues to manually control and continuously runs in the rack with abnormal vibration until the abnormal vibration disappears; S5. When the vibration amplitude of the saddle is less than the standard value, it is judged that the minimum load running-in is completed, and the lifting mechanism is controlled to operate to raise or lower the angle of the bucket, wherein the raising angle range of the bucket is 0-15°, and the lowering angle of the bucket is 0-90°; S6. Repeat the operations of S1-S4, that is, the gear and the rack can be run-in from different angles until the vibration of the saddle detected by the vibration sensor reaches an optimal state, and the running-in of the gear and the rack is completed.

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