Automatic press-fitting device for agricultural machinery bearing assembly and use method

Abstract

The invention discloses an automatic press-fitting device for agricultural machinery bearing assembly and a using method, and belongs to the technical field of agricultural machinery bearing assembly.The automatic press-fitting device comprises a rack, a horizontal workbench is arranged on the rack, and a cushion tool is arranged on the workbench and detachably connected with the workbench; a horizontal supporting plate is arranged on the upper portion of the workbench and connected with the rack, a driving mechanism is arranged on the upper portion of the supporting plate, and the output end of the driving mechanism penetrates through the supporting plate to be connected with the pressing head and faces the cushion tool. A guide structure is arranged between the supporting plate and the workbench, the position between the output end of the driving mechanism and the pressing head is connected with the guide structure, and the pressing head can vertically move under the guidance of the guide structure; a displacement sensor and a photoelectric sensor are arranged on the supporting plate; a controller is further arranged on the side portion of the machine frame, and the driving mechanism, the displacement sensor and the photoelectric sensor are in communication connection with the controller. The agricultural machinery bearing press-fitting device can achieve automation and standardization of agricultural machinery bearing press-fitting.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery bearing assembly, and particularly relates to an automatic press-fitting device for agricultural machinery bearing assembly. Background Art

[0002] Shaft parts of agricultural machinery are characterized by large size and high length-diameter ratio, so they are prone to bending deformation during press-fitting. At present, in the production process of agricultural machinery assembly for bearing installation, manual installation is mainly adopted. It is understandable that the installation efficiency of this method is low. In order to improve the installation efficiency of bearings, in the prior art, mechanized press-fitting of bearings is carried out by using an automatic press equipment, but there are still certain problems:

[0003] During the automatic press-fitting process of the bearing by the automatic press equipment, the press-fitting equipment can only perform a downward movement with a fixed stroke to assemble the bearing fittings, and the press-fitting force is single. Since both the press-fitting force and the stroke cannot be effectively monitored and controlled, when the equipment press head applies pressure to the outer ring of the bearing for assembly or presses the inner ring of the bearing to install the bearing into the housing, an excessive press-fitting force or stroke may cause the bearing to deform or be damaged, and may also cause the problem of being too tight after assembly, affecting the normal operation of the bearing; while when the press-fitting force or stroke is too small, it is easy to cause the problem of looseness after bearing assembly, resulting in unnecessary sliding friction, and then generating a large amount of heat, affecting the service life, and also generating vibration and noise. At this time, manual secondary corrective assembly is required, which is very time-consuming and laborious. And when manually correcting, a hammer is usually used to directly strike the end face of the inner ring or outer ring of the bearing for assembly, and this method will also cause damage to the bearing.

[0004] In addition, it is understandable that automatic press-fitting requires high-precision positioning. During the process of bearing press-fitting by the current press-fitting equipment, the press head is usually connected to the driving end in a single-axis manner. When the press head contacts the bearing during press-fitting, it will rotate under force, and the repeated positioning accuracy of the press head is insufficient, resulting in the problem of unqualified bearing press-fitting. At the same time, it increases the wear of the connection structure between the press head and the drive system; and there are many types of agricultural machinery (such as tractors, harvesters, seeders), and the bearing models vary greatly. The automatic equipment needs to frequently switch tooling. The current automatic press equipment can only achieve single bearing press-fitting, and the pad part is a fixed structure, and it cannot realize press-fitting limit and clamping for different bearings. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the present invention provides an automatic press-fitting device and a usage method for the assembly of bearings in agricultural machinery. By setting a displacement sensor to monitor the cylinder stroke in real time and cooperating with a photoelectric inductor and a PLC controller, the press-fitting automation and standardization are realized. And a guiding structure is set to prevent assembly errors caused by the rotation of the press head due to force, ensuring the bearing press-fitting quality. Moreover, the press head and the padding tool are provided with a quick-change structure to realize the quick replacement of the padding tool and the press head for limit press-fitting of various types of bearings, improving the scope of application and effectively preventing bearing press-fitting damage caused by operation errors.

[0006] The technical solution of the present invention is as follows:

[0007] In the first aspect of the present invention, there is provided an automatic press-fitting device for the assembly of bearings in agricultural machinery, including a frame. A horizontal workbench is provided on the frame, and a padding tool is provided on the workbench, and the padding tool is detachably connected to the workbench; A horizontal support plate is provided above the workbench and connected to the frame. A driving mechanism is provided on the upper part of the support plate, and the output end of the driving mechanism passes through the support plate and is connected with a press head facing the padding tool; A guiding structure is provided between the support plate and the workbench, and the guiding structure is connected at the position between the output end of the driving mechanism and the press head. The press head can move vertically under the guidance of the guiding structure; A displacement sensor and a photoelectric inductor are provided on the support plate; A controller is also provided on the side of the frame, and the driving mechanism, the displacement sensor and the photoelectric inductor are communicatively connected with the controller.

[0008] In some embodiments of the present invention, the guiding structure includes a horizontally arranged I-shaped structural member and two guiding rods vertically arranged between the support plate and the workbench. The middle part of the I-shaped structural member is connected at the position between the output end of the driving mechanism and the press head, and sleeves are provided at both ends of the I-shaped structural member; The two guiding rods are respectively slidably connected with the sleeves at both ends of the I-shaped structural member.

[0009] In some embodiments of the present invention, two limiting plates are symmetrically provided on both sides of the I-shaped structural member close to the output end of the driving mechanism.

[0010] In some embodiments of the present invention, the driving mechanism is driven by a cylinder.

[0011] In some embodiments of the present invention, the press head is detachably connected to the output end of the driving mechanism.

[0012] In some embodiments of the present invention, a surrounding plate is vertically provided between the workbench and the support plate. The surrounding plate includes a rectangular surrounding plate connected to the support and triangular surrounding plates provided on both sides of the rectangular surrounding plate.

[0013] In some embodiments of the present invention, the displacement sensor is arranged on the top of the support plate. A connecting plate is provided on the I-shaped structural member, and the displacement sensor is connected to the connecting plate through a connecting rope;

[0014] The photoelectric inductor is arranged at the bottom of the support plate. A detection plate is provided on the I-shaped structural member, and the photoelectric inductor is used for position detection of the detection plate.

[0015] In some embodiments of the present invention, a groove structure is provided in the middle of the padding tool, and the geometric center of the groove structure corresponds to the geometric center of the pressing head.

[0016] In some embodiments of the present invention, an electric control screen is provided on the controller for operating the pressing device. An alarm loudspeaker and a time relay are also provided on the controller, and the alarm loudspeaker and the time relay are communicatively connected to the controller.

[0017] In a second aspect of the present invention, a method for using an automatic pressing device for assembling bearings of agricultural machinery is provided, including:

[0018] Select corresponding padding tools and pressing heads according to the bearing fittings to be assembled. The padding tool is installed on the workbench, and the pressing head is installed at the output end of the cylinder. Place the bearing fittings at the padding tool for positioning;

[0019] Input the parameters of the bearing to be pressed on the controller. The driving mechanism drives the pressing head to press the bearing fittings downward along the guiding structure. The displacement sensor monitors the stroke of the driving mechanism in real time. After the stroke of the driving mechanism reaches the set parameters, the displacement sensor sends a displacement induction signal to the controller. After receiving the displacement induction signal, the controller controls the driving mechanism to keep the pressing head acting for the set time. After the set time, the controller controls the driving mechanism to retract the pressing head. After the pressing head retracts to the top origin starting position, when the photoelectric inductor is aligned with the detection plate, a photoelectric induction signal is generated and sent to the controller, and the driving mechanism stops acting;

[0020] Complete the bearing assembly.

[0021] One or more technical solutions of the present invention have the following beneficial effects:

[0022] The automatic pressing device and the using method for assembling bearings of agricultural machinery provided by the present invention realize the automation and standardization of pressing by setting a displacement sensor to monitor the cylinder stroke in real time and cooperating with a photoelectric inductor and a PLC controller. Compared with traditional automatic press equipment, the assembly error is greatly reduced. And a guiding structure is provided. After the guiding structure of the I-shaped structure is welded to the sleeve, it can effectively prevent deformation under force and prevent the assembly error caused by the rotation of the pressing head due to force, ensuring the bearing pressing quality. And a quick-change structure is provided to realize the limited pressing of various types of bearings, improving the applicable range and effectively preventing the bearing pressing damage caused by operation errors.

[0023] The PLC controller stores various bearing pressing data. After selecting a bearing for pressing, the required pressing data is selected. The cushion is replaced through a quick-change structure to achieve stable limiting adaptation to the bearing. The cylinder is started to drive and cooperate with the displacement sensor and the photoelectric inductor to monitor and control the cylinder stroke, preventing over-pressing or under-pressing. And an I-shaped guiding structure is provided between the cylinder and the pressing head for stable guiding to prevent the pressing head from rotating during the pressing process and affecting the quality of the pressing device, thereby realizing the efficient automatic pressing of various types of agricultural machinery bearings.

[0024] The present invention also has two modes, manual and automatic, at the controller end, and is equipped with a remote control unit, which enables the staff to start and stop the pressing device conveniently and quickly. In addition, an alarm loudspeaker is equipped on the controller, which works in conjunction with the time relay to prevent other staff from misoperating inadvertently when the device starts, and to avoid safety risks. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the overall structure of an automatic pressing device for agricultural machinery bearing assembly provided by Embodiment 1 of the present invention;

[0026] Figure 2 It is a schematic diagram of the structure of the I-shaped structural member provided by Embodiment 1 of the present invention.

[0027] In the figure: 1. Driving mechanism; 2. Displacement sensor; 3. Guiding structure; 4. Pressing head; 5. Controller; 6. I-shaped structural member; 7. Photoelectric inductor; 8. Detection plate; 9. Frame; 10. Groove structure; 11. Limiting plate; 12. Connecting plate; 13. Sleeve; 14. Cushion. Detailed Embodiments

[0028] The present invention will be further described below in conjunction with the drawings and embodiments.

[0029] Embodiment 1

[0030] In a typical embodiment of the present invention, an automatic press-fitting device for assembling bearings of agricultural machinery is proposed, which includes a frame 9. A horizontal workbench is provided on the frame 9, and a padding tool 14 is provided on the workbench. The padding tool 14 is detachably connected to the workbench. A horizontal support plate is provided above the workbench and connected to the frame 9. A driving mechanism 1 is provided above the support plate. The output end of the driving mechanism 1 vertically passes through the support plate and is connected to a press head 4 facing the padding tool 14. A guiding structure 3 is provided between the support plate and the workbench, and the guiding structure 3 is connected at the position between the output end of the driving mechanism 1 and the press head 4. The press head 4 can move vertically under the guidance of the guiding structure 3. A displacement sensor 2 and a photoelectric sensor 7 are provided on the support plate. A controller 5 mounting seat is also connected to the side of the frame 9, and a controller 5 is provided on the controller 5 mounting seat. The driving mechanism 1, the displacement sensor 2, and the photoelectric sensor 7 are communicatively connected to the controller 5.

[0031] In this embodiment, the frame 9 is composed of four columns to form a rectangular frame structure. Transverse connecting columns are provided between the columns for connection and support to provide stability for the entire device. The heights of the two front columns are the same, and the heights of the two rear columns are the same and higher than those of the front columns, forming a stepped structure. A workbench is horizontally provided at the top of the front columns, and a horizontal support plate is provided at the top of the rear columns, thus forming a stable frame structure. The overall structure is simple and practical and very stable.

[0032] Except for the operation surface where personnel place bearing accessories between the workbench and the support plate, a surrounding plate is provided to form a certain press-fitting space. While the surrounding plate provides certain structural support and stability, the press-fitting space can prevent the bearing accessories from bursting and flying during the press-fitting process and hurting the operators.

[0033] A padding tool 14 is provided on the workbench. The padding tool 14 is detachably connected to the workbench. The quick replacement of the padding tool 14 on the workbench can be realized by setting a quick-change structure, and after replacement, it is fixed by setting bolt holes on the periphery of the padding tool 14 and connecting with the workbench through bolts.

[0034] The quick-change structure can be set as follows: Elastic contact structures are provided on the peripheral side of the lower part of the padding tool 14, a groove-shaped structure is provided on the workbench where the padding tool 14 is placed, and an annular groove adapted to the elastic structure is provided on the inner side wall of the groove-shaped structure. Thus, it is convenient to press the padding tool 14 into the groove-shaped structure on the workbench. During this process, when the elastic structure is compressed and retracted to reach the annular groove, it pops out to achieve limit clamping. When it needs to be removed, the padding tool 14 is compressed when the padding tool 14 is pulled out, and then the padding tool 14 can be taken out.

[0035] The workbench and the support plate are horizontally arranged relative to each other. The output end of the driving mechanism 1 vertically passes through the support plate and faces the padding tool 14. With such an arrangement, after the driving mechanism 1 is installed on the support plate, it is convenient for its output end to press down exactly corresponding to the padding tool 14, and at the same time, it ensures that the downward pressure can be evenly aligned with the bearing fittings on the padding tool 14.

[0036] A guiding structure 3 is connected at the position between the output end of the driving mechanism 1 and the pressing head 4, and the pressing head 4 can move vertically under the guidance of the guiding structure 3. This is because in the process of bearing pressing of existing pressing equipment, the pressing head 4 is usually connected to the driving end in a single-axis manner. When the pressing head 4 contacts the bearing during pressing, it will rotate under force, and the repeated positioning accuracy of the pressing head 4 is insufficient, which may lead to the problem of unqualified bearing pressing. At the same time, it increases the wear of the connection structure between the pressing head 4 and the driving system. In this embodiment, the guiding structure 3 can provide stable guidance to prevent the pressing head 4 from rotating during the pressing process and affecting the quality of the pressing device. At the same time, the support plate and the workbench are arranged parallel to each other, and the output end of the driving mechanism 1 is vertically arranged. With the stable guidance of the guiding structure 3, the stable pressing of the bearing can be realized, and the wear at the direct connection between the pressing head 4 and the driving mechanism 1 can be reduced, improving the durability of the device.

[0037] During the automatic pressing process of existing bearing fittings in an automatic press equipment, the pressing equipment can only perform a downward pressing action with a fixed stroke to assemble the bearing fittings, and the pressing force is single, and both the pressing force and the stroke cannot be effectively monitored and controlled. When the equipment's pressing head 4 applies pressure to the outer ring of the bearing for assembly or presses the inner ring of the bearing to install the bearing into the housing, if the pressing force or the stroke is too large, it may cause the bearing to deform or be damaged, and may also cause the problem of being too tight after assembly, affecting the normal operation of the bearing; while when the pressing force or the stroke is too small, it is easy to cause the problem of looseness after bearing assembly, resulting in unnecessary sliding friction, generating a large amount of heat and affecting the service life, and also generating vibration and noise. At this time, manual secondary corrective assembly is required, which is very time-consuming and laborious. And when manually correcting, a hammer is usually used to directly strike the end face of the inner ring or outer ring of the bearing for assembly, and this method will also cause damage to the bearing.

[0038] Therefore, in this embodiment, by providing a displacement sensor 2 and a photoelectric inductor 7 on the support plate, a controller 5 mounting seat is provided on the side of the frame 9, and a controller 5 is provided on the controller 5 mounting seat. The driving mechanism 1, the displacement sensor 2, and the photoelectric inductor 7 are communicatively connected to the controller 5. By inputting the parameters of the bearing to be pressed on the controller 5, the driving mechanism 1 drives the pressing head 4 to press the bearing fitting downward along the guiding structure 3. The displacement sensor 2 monitors the stroke of the driving mechanism 1 in real time. After the stroke of the driving mechanism 1 reaches the set parameters, the displacement sensor 2 sends a displacement induction signal to the controller 5. After receiving the displacement induction signal, the controller 5 controls the driving mechanism 1 to keep the pressing head 4 acting for a set time. After the set time, the controller 5 controls the driving mechanism 1 to retract the pressing head 4. After the pressing head 4 retracts to the top, after the photoelectric inductor 7 is aligned with the detection plate 8, a photoelectric induction signal is generated and sent to the controller 5, and the driving mechanism 1 stops acting. By providing the displacement sensor 2 to monitor the cylinder stroke in real time and cooperating with the photoelectric inductor 7 and the PLC controller 5, the automation and standardization of the bearing fitting pressing are realized, greatly improving the work efficiency and ensuring the qualified rate of the bearing pressing.

[0039] Further, the guiding structure 3 includes a horizontally arranged I-shaped structural member 6 and two guiding rods vertically arranged between the support plate and the workbench. The middle part of the I-shaped structural member 6 is connected at the position between the output end of the driving mechanism 1 and the pressing head 4. Sleeve barrels 13 are provided at both ends of the I-shaped structural member 6; the two guiding rods are respectively slidably connected to the sleeve barrels 13 at both ends of the I-shaped structural member 6.

[0040] In this embodiment, the I-shaped structural member 6 has good torsional resistance and stability, can provide good guiding for the pressing head 4, and will not rotate due to the force during the pressing process. The I-shaped structural member 6 can be formed by welding multiple rectangular plates, and the thickness of the plates is about 6 mm, providing sufficient endurance strength. The length of the I-shaped structural member 6 does not exceed the width of the workbench to avoid interference between the I-shaped structural member 6 and the surrounding plate during use.

[0041] The two guiding rods are respectively slidably connected to the sleeve barrels 13 provided at both ends of the I-shaped structural member 6. The guiding rods are vertically arranged between the workbench and the support plate. The two guiding rods cooperate with the I-shaped structural member 6 to provide a stable guiding function for the driving mechanism 1, and at the same time avoid the situation that the driving structure rotates due to the pressing force during use, and also reduce the wear between the connecting parts due to the rotational force.

[0042] Furthermore, two limiting plates 11 are symmetrically arranged on both sides of the I-shaped structural member near the output end of the driving mechanism 1. By providing the limiting plates 11, after the I-shaped structural member 6 moves upward to the top position, the limiting plates 11 abut against the bottom of the supporting plate, which can prevent the I-shaped structural member 6 from continuing to move upward due to operation errors and colliding. At the same time, the displacement sensor 2 is connected to the connecting plate 12 on the I-shaped structural member 6 through a connecting rope, and the limiting effect of the limiting plates 11 can also prevent the displacement sensor 2 from being damaged due to excessive movement of the I-shaped structural member 6.

[0043] Furthermore, the driving mechanism 1 is driven by a cylinder. In the prior art, a hydraulic device is mostly used for driving, but there is a problem of hydraulic oil leakage in the hydraulic press oil pump, which requires continuous cleaning and maintenance in the later stage. Therefore, a cylinder is selected as the driving mechanism 1. Selecting a cylinder with a maximum thrust of 20KN can meet the needs of most bearing press-fittings and reduce the later maintenance workload.

[0044] Furthermore, the pressing head 4 is detachably connected to the output end of the driving mechanism 1. The quick replacement of the pressing head 4 and the output end of the driving mechanism 1 can be realized by setting a quick-change structure, so as to realize the adaptive press-fitting of various bearing fittings.

[0045] The quick-change structure can be set as follows: the pressing head 4 and the output end of the driving mechanism 1 can be a sleeved structure. An annular groove is arranged on the circumferential side of the lower part of the output end of the driving mechanism 1, and the inner wall of the pressing head 4 sleeved on the output end of the driving mechanism 1 is provided with an elastic contact structure, so that the pressing head 4 can be conveniently sleeved into the annular groove of the output end of the driving mechanism 1. During this process, when the elastic structure is compressed and retracted to reach the annular groove, it pops out to realize limit clamping. When it needs to be removed, when the pressing head 4 is pulled out, the elastic structure will be compressed, so as to remove the pressing head 4 of the pad 14.

[0046] Furthermore, a surrounding plate is vertically arranged between the workbench and the supporting plate. By setting the surrounding plate structure, a press-fitting space can be formed, which provides a certain connection support function for the supporting plate. At the same time, the surrounding plate can prevent the bearing fittings from bursting and flying during the press-fitting process and hurting the operators.

[0047] Furthermore, the surrounding plate includes a rectangular surrounding plate connected to the bracket and triangular surrounding plates arranged on both sides of the rectangular surrounding plate. The surrounding plates on both sides are triangular surrounding plates. The upper part of the triangular surrounding plate can, on the premise of ensuring a certain connection support function, prevent the bearing fittings from bursting and flying during the press-fitting process and hurting the operators at the lower part of its wide side, and at the same time, it is convenient for people to observe.

[0048] The middle part of the cushion 14 is provided with a groove structure 10, and the geometric center of the groove structure 10 corresponds to the geometric center of the pressing head 4. The bearing fittings are limited by the groove structure 10 in the middle of the cushion 14. At the same time, the corresponding geometric centers of the groove structure 10 and the pressing head 4 can ensure the accuracy of the pressing position and the uniformity of the applied force.

[0049] Further, the displacement sensor 2 is arranged on the top of the support plate. A connecting plate 12 is provided on the I-shaped structural member 6, and the displacement sensor 2 is connected to the connecting plate 12 through a connecting rope.

[0050] The photoelectric inductor 7 is arranged at the bottom of the support plate. A detection plate 8 is provided on the I-shaped structural member 6, and the detection plate 8 is arranged corresponding to the position of the photoelectric inductor 7. The photoelectric inductor 7 is used to detect the position of the detection plate 8.

[0051] In this embodiment, the displacement sensor 2 is arranged on the top of the support plate. It is connected to the connecting plate 12 on the I-shaped structural member 6 through a connecting rope passing through the support plate, so as to monitor the vertical displacement of the I-shaped structural member 6 according to the extended length and the contracted length of the connecting rope.

[0052] The photoelectric inductor 7 is arranged at the bottom of the support plate. When the I-shaped structural member 6 is at the starting origin position at the top, the detection plate 8 on the I-shaped structural member 6 is arranged corresponding to the photoelectric inductor 7. At this time, the photoelectric inductor 7 generates a photoelectric induction signal and sends it to the controller 5 to determine that the I-shaped structural member 6 is at the starting origin position. When the I-shaped structural member 6 moves downward, the photoelectric induction signal disappears. The displacement position of the I-shaped structural member 6 is judged in cooperation with the displacement induction signal of the displacement sensor 2. When the pressing head 4 completes the pressing, the I-shaped structural member 6 returns to the starting origin position. After the photoelectric inductor 7 is aligned with the detection plate 8, a photoelectric induction signal is generated and sent to the controller 5, and the controller 5 controls the driving mechanism 1 to stop operating.

[0053] Further, an electric control screen is provided on the controller 5 for operating the pressing device. An alarm loudspeaker and a time relay are also provided on the controller 5, and the alarm loudspeaker and the time relay are communicatively connected to the controller 5.

[0054] In this embodiment, the controller 5 has two modes: manual and automatic, and is equipped with a remote control unit, which enables the staff to start and stop the pressing device conveniently and quickly. In addition, an alarm loudspeaker is equipped on the controller 5 to work in cooperation with the time relay to prevent other staff from operating by mistake without knowing when the device starts, thus avoiding safety risks.

[0055] In the second aspect of the present invention, a use method of an automatic pressing device for assembling bearings of agricultural machinery is provided, including:

[0056] Select the corresponding padding tool 14 and the pressing head 4 according to the required assembled bearing fittings. The padding tool 14 is installed on the workbench, and the pressing head 4 is installed at the output end of the cylinder. Place the bearing fittings at the padding tool 14 for positioning;

[0057] Input the parameters of the bearing to be pressed on the controller 5. The driving mechanism 1 drives the pressing head 4 to press the bearing fittings downward along the guiding structure 3. The displacement sensor 2 monitors the stroke of the driving mechanism 1 in real time. After the stroke of the driving mechanism 1 reaches the set parameters, the displacement sensor 2 sends a displacement induction signal to the controller 5. After receiving the displacement induction signal, the controller 5 controls the driving mechanism 1 to keep the pressing head 4 acting for the set time. After the set time, the controller 5 controls the driving mechanism 1 to retract the pressing head 4. After the pressing head 4 retracts to the top origin starting position, when the photoelectric inductor 7 aligns with the detection plate 8, a photoelectric induction signal is generated and sent to the controller 5, and the driving mechanism 1 stops acting;

[0058] The bearing assembly is completed.

[0059] In this embodiment, during operation, power on the controller 5, and the power indicator light is always on. Select the automatic mode or the manual mode on the electronic control panel, and replace the corresponding pressing head 4 and padding tool 14 according to the production requirements of the bearing fittings. In the manual mode, press the forward button, and the pressing head 4 immediately starts to press down and stops immediately after releasing the button; in the automatic mode, select the parameters of the bearing to be pressed on the electronic control panel or manually input the pressing stroke distance, press the forward button, the air source of the driving mechanism 1 is connected to the cylinder through the solenoid valve, the solenoid valve starts to operate, the cylinder starts to press the pressing head 4 downward, stops immediately after reaching the set position and waits for 1 second to retract to the origin. This process can be stopped at any time by pressing the emergency stop button. Place the bearing fittings on the padding tool 14, and then it can operate normally. And so on, in a cycle. After the last fitting is pressed, press the stop button, and the entire operation process is completed.

[0060] Although the specific embodiments of the present invention are described above in conjunction with the drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the present invention.

Claims

1. An automatic press-fitting device for assembling bearings of agricultural machinery, characterized in that, It includes a frame, on which there is a horizontal workbench. A padding tool is provided on the workbench, and the padding tool is detachably connected to the workbench. A horizontal support plate is provided above the workbench and connected to the frame. A driving mechanism is provided on the upper part of the support plate. The output end of the driving mechanism passes through the support plate and is connected with a pressing head facing the padding tool. A guiding structure is provided between the support plate and the workbench, and the guiding structure is connected at the position between the output end of the driving mechanism and the pressing head. The pressing head can move vertically under the guidance of the guiding structure. A displacement sensor and a photoelectric inductor are provided on the support plate. A controller is also provided on the side of the frame. The driving mechanism, the displacement sensor and the photoelectric inductor are communicatively connected to the controller.

2. An automatic press-fitting device for agricultural machinery bearing assembly according to claim 1, characterized in that, The guiding structure includes a horizontally arranged I-shaped structural member and two guiding rods vertically arranged between the support plate and the workbench. The middle part of the I-shaped structural member is connected at the position between the output end of the driving mechanism and the pressing head. Sleeves are provided at both ends of the I-shaped structural member. The two guiding rods are respectively slidably connected with the sleeves at both ends of the I-shaped structural member.

3. The automated press-fitting device for agricultural machinery bearing assembly according to claim 2, characterized in that, Two limiting plates are symmetrically provided on both sides of the I-shaped structural member close to the output end of the driving mechanism.

4. An automatic press-fitting device for agricultural machinery bearing assembly according to claim 1, characterized in that, The driving mechanism is driven by a cylinder.

5. An automatic press-fitting device for assembling bearings of agricultural machinery according to claim 1, characterized in that, The pressing head is detachably connected to the output end of the driving mechanism.

6. An automatic press-fitting device for agricultural machinery bearing assembly according to claim 1, characterized in that, A vertical enclosing plate is provided between the workbench and the support plate. The enclosing plate includes a rectangular enclosing plate connected to the bracket and triangular enclosing plates provided on both sides of the rectangular enclosing plate.

7. An automatic press-fitting device for agricultural machinery bearing assembly according to claim 2, characterized in that, The displacement sensor is arranged at the top of the support plate. A connecting plate is provided on the I-shaped structural member. The displacement sensor is connected to the connecting plate through a connecting rope. The photoelectric inductor is arranged at the bottom of the support plate. A detection plate is provided on the I-shaped structural member. The photoelectric inductor is used to detect the position of the detection plate.

8. An automatic press-fitting device for assembling bearings of agricultural machinery according to claim 1, characterized in that, A groove structure is provided in the middle of the padding tool, and the geometric center of the groove structure corresponds to the geometric center of the pressing head.

9. An automatic press-fitting device for assembling bearings of agricultural machinery according to claim 1, characterized in that, An electric control screen is provided on the controller for operating the pressing device. An alarm loudspeaker and a time relay are also provided on the controller. The alarm loudspeaker and the time relay are communicatively connected to the controller.

10. A method for using an automatic press-fitting device for assembling bearings of agricultural machinery according to any one of claims 1-9, characterized in that, It includes: Select the corresponding padding tool and pressing head according to the required assembled bearing fittings. The padding tool is installed on the workbench, and the pressing head is installed at the output end of the cylinder. Place the bearing fittings at the padding tool for positioning. Input the parameters of the bearing to be pressed on the controller. The driving mechanism drives the pressing head to press the bearing fittings downward along the guiding structure. The displacement sensor real-time monitors the stroke of the driving mechanism. After the stroke of the driving mechanism reaches the set parameters, the displacement sensor sends a displacement induction signal to the controller. After receiving the displacement induction signal, the controller controls the driving mechanism to keep the pressing head acting for the set time. After the set time, the controller controls the driving mechanism to retract the pressing head. After the pressing head retracts to the top origin starting position, the photoelectric inductor generates a photoelectric induction signal after aligning with the detection plate and sends it to the controller, and the driving mechanism stops acting. Complete the bearing assembly.

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