Automatic oil pump assembling system and method

Abstract

The present application relates to the technical field of oil pump assembly production, in particular to an automatic oil pump assembly system and an automatic oil pump assembly method. The automatic oil pump assembly system is used for installing an oil pump on an engine body, and mainly comprises a rack, a first clamping device, a second clamping device, a tightening device, a mechanical arm and a control device. The rack comprises a first mounting part and a second mounting part, and the first mounting part is connected to the second mounting part. The first clamping device is arranged on one side of the first mounting part, the second clamping device is arranged on one side of the second mounting part, the tightening device is arranged on the second mounting part, and the mechanical arm is connected to the first mounting part. According to the automatic oil pump assembly system, the mechanical arm, the first clamping device, the second clamping device and the tightening device are controlled by the control device, so that the transition from manual assembly to automatic assembly can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil pump assembly production, in particular to an automatic oil pump assembly system and an automatic oil pump assembly method. BACKGROUND

[0002] At present, the assembly of an oil pump usually needs to rely on manual operation, but the shape of the oil pump is irregular, and the appearance is usually a blank surface, which is not easy to assemble automatically. In addition, the matching precision between the oil pump and the assembly parts is extremely high.

[0003] In the prior art, one worker usually visually checks the in-place condition of the machine body and manually adjusts the position of the oil pump, and then uniformly and horizontally assembles the oil pump joint surface and two positioning pin sleeves into the machine body, and then rotates the screw to fix the oil pump. Another worker uses an electric tightening device to tighten the inner hexagonal cylindrical head screw according to the process sequence.

[0004] However, the prior art has the following disadvantages: first, two workers are needed to participate in the assembly process, which is not conducive to automatic production; second, the weight of the oil pump and long-term carrying cause a burden on the workers' bodies; third, the tightening of the screw is prone to human error and work accidents. SUMMARY

[0005] The purpose of the present application is to at least solve the problem that the oil pump cannot be automatically assembled. The purpose is achieved by the following technical scheme:

[0006] The first aspect of the present application provides an automatic oil pump assembly system for installing an oil pump on a machine body of an engine, comprising:

[0007] A rack, the rack comprising a first mounting portion and a second mounting portion, the first mounting portion being connected to the second mounting portion;

[0008] A first clamping device, the first clamping device being arranged on one side of the first mounting portion;

[0009] A second clamping device, the second clamping device being arranged on one side of the second mounting portion, and the second clamping device being arranged on the same side as the first clamping device;

[0010] A tightening device, the tightening device being arranged on the second mounting portion and cooperating with the second clamping device, and one end of the tightening device towards the oil pump passing through the second mounting portion;

[0011] A mechanical arm, the mechanical arm being connected to one side of the first mounting portion away from the first clamping device;

[0012] A control device electrically connected to the first clamping device, the second clamping device, the tightening device and the mechanical arm.

[0013] The oil pump automatic assembly system according to the present application performs rough positioning on the oil pump in the process of clamping the oil pump from the rack to the positioning plane by the first clamping device. Then, the oil pump is positioned accurately on the positioning plane. Finally, the oil pump is clamped from the positioning plane to the body of the engine by the second clamping device. When the oil pump is installed to the body of the engine, the tightening device fastens the screw to be fastened, and the oil pump is installed to the body. In the process, the control device controls the mechanical arm, the first clamping device, the second clamping device and the tightening device, and the transformation from manual assembly to automatic assembly can be realized.

[0014] In addition, the oil pump automatic assembly system according to the present application can further have the following additional technical features:

[0015] In some embodiments of the present application, the oil pump automatic assembly system further comprises a floating adjusting device arranged between the first mounting portion and the second mounting portion, and the first mounting portion is connected to the second mounting portion through the floating adjusting device.

[0016] In some embodiments of the present application, the first clamping device comprises a first clamping jaw and a first positioning jaw, and the first clamping jaw and the first positioning jaw are arranged on the same side of a first limiting plate.

[0017] In some embodiments of the present application, the second clamping device comprises a second clamping jaw and a second positioning jaw, and the second clamping jaw and the second positioning jaw are arranged on the second mounting portion.

[0018] In some embodiments of the present application, the oil pump automatic assembly system further comprises a sensing device arranged on the side of the second mounting portion facing the oil pump.

[0019] In some embodiments of the present application, the second mounting portion comprises a second connecting plate, a second limiting plate and a third limiting plate arranged at intervals, the second connecting plate connects the first mounting portion, the third limiting plate connects the second connecting plate through a support, the tightening device passes through and is fixed on the third limiting plate, the second connecting plate is provided with a second through hole for the end of the tightening device to pass through, the second limiting plate is provided with a first through hole for the end of the tightening device to pass through, and the second connecting plate and the second limiting plate are connected through a displacement assembly.

[0020] In some embodiments of the present application, a telescopic guide assembly is further arranged between the second connecting plate and the second limiting plate, one end of the guide assembly is connected to the second connecting plate, and the other end of the guide assembly is connected to the second limiting plate.

[0021] In some embodiments of the present application, a screw guide sleeve is arranged on the side of the second limiting plate facing the oil pump, and the screw guide sleeve is in communication with the first through hole.

[0022] In some embodiments of the present application, the displacement assembly comprises a cylinder body and a cylinder rod, the cylinder body is arranged on the side of the second connecting plate facing the second limiting plate, one end of the cylinder rod is accommodated in the cylinder body, and the other end of the cylinder rod is connected to the second limiting plate.

[0023] The second aspect of the present application provides an automatic oil pump assembly method, which is applied to the automatic oil pump assembly system described above, and comprises the following steps:

[0024] Clamping the oil pump from the rack to the positioning plane;

[0025] Clamping the oil pump from the positioning plane to the mounting position of the body to be mounted, and aligning the screws to be mounted on the oil pump with the screw holes of the body;

[0026] Tightening the screws into the screw holes. BRIEF DESCRIPTION OF DRAWINGS

[0027] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments, and are not to be considered as limiting of the present application. Moreover, in the drawings, like reference numerals refer to similar components throughout the several views. In the drawings:

[0028] Figure 1 The structure schematic diagram of the automatic oil pump assembly system according to the embodiments of the present application is schematically shown;

[0029] Figure 2 The first perspective exploded structure schematic diagram of the automatic oil pump assembly system according to the embodiments of the present application is schematically shown; Figure 1

[0030] Figure 3 The partial structure schematic diagram of the automatic oil pump assembly system according to the embodiments of the present application is schematically shown;

[0031] Figure 4 The second perspective exploded structure schematic diagram of the automatic oil pump assembly system according to the embodiments of the present application is schematically shown; Figure 1

[0032] Figure 5 ​​Front view of the automatic assembly system of the oil pump according to the embodiment of the present application;

[0033] Figure 6 Right view of the automatic assembly system of the oil pump according to the embodiment of the present application;

[0034] Figure 7 Partial sectional view of the automatic assembly system of the oil pump according to the embodiment of the present application;

[0035] Figure 8 Schematic view of the screw assembly in the first state;

[0036] Figure 9 Schematic view of the screw assembly in the second state;

[0037] Figure 10 Schematic view of the structure of the first mounting portion and the first clamping device according to the embodiment of the present application;

[0038] Figure 11 Schematic view of the structure of the first clamping device according to the embodiment of the present application;

[0039] Figure 12 Schematic view of the structure of the second clamping device according to the embodiment of the present application;

[0040] Figure 13 Schematic view of the structure of the second clamping jaw according to the embodiment of the present application;

[0041] Figure 14 Schematic view of the structure of the second positioning jaw according to the embodiment of the present application;

[0042] Figure 15 Control principle diagram of the automatic assembly system of the oil pump according to the embodiment of the present application;

[0043] Figure 16 Flowchart of the automatic assembly method of the oil pump according to the embodiment of the present application.

[0044] The reference signs are as follows:

[0045] 100, automatic assembly system of the oil pump;

[0046] 10, rack; 11, first mounting part; 111, first connecting plate; 1111, positioning pin hole; 112, reinforcing rib; 113, first limiting plate; 12, second mounting part; 121, second limiting plate; 1211, screw guide sleeve; 12110, trumpet surface; 12111, first screw guide sleeve; 12112, second screw guide sleeve; 12113, third screw guide sleeve; 12114, fourth screw guide sleeve; 12115, fifth screw guide sleeve; 1212, guide hole; 122, second connecting plate; 1221, second through hole; 123, third limiting plate; 1231, support; 1232, tightening shaft limiting plate; 13, displacement assembly; 131, floating joint; 132, air cylinder rod; 133, air cylinder body; 14, guide assembly; 141, linear bearing; 142, guide rod; 143, guide gasket;

[0047] 20, first clamping device; 21, first clamping jaw; 22, first positioning jaw;

[0048] 30, second clamping device; 31, second clamping jaw; 311, three-jaw clamp; 312, three-jaw air cylinder; 32, second positioning jaw; 321, flat-opening air cylinder; 322, rhombic right-hand finger; 323, rhombic left-hand finger;

[0049] 40, tightening device; 401, pneumatic motor; 41, hexagonal ball head bit; 42, slotted conical end set screw; 43, first needle roller bearing; 44, spring; 45, cylindrical pin; 46, output shaft; 47, second needle roller bearing; 48, input shaft; 49, tightening shaft sleeve;

[0050] 50, floating adjustment device; 51, fixed plate; 52, floating air cylinder; 53, plunger; 54, plunger holder; 55, adjustment block;

[0051] 60, first sensing device; 61, second sensing device;

[0052] 70, mechanical arm;

[0053] 80, control device;

[0054] 200, oil pump; 201, screw to be installed; 2011, cylindrical head outer cylindrical surface of screw;

[0055] 300, machine body. DETAILED DESCRIPTION

[0056] Exemplary embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. While example embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0057] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and the like are to be construed to be inclusive (i.e., to include both instances of open ended terms and instances of terms limiting to a specific number) unless otherwise indicated as otherwise limited by context. The methods described herein can be implemented as a method, an apparatus, a system, a computer program product, computer-readable medium, computer program, or a combination thereof.

[0058] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0059] For ease of description, spatially relative terms can be used herein for the purpose of illustrating one element's or feature's relationship to another element or feature as shown in the figures. Such spatially relative terms include "internal", "external", "inward", "outward", "under", "below", "lower", "above", "upper", and the like. These spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0060] As shown in Figure 1 and Figure 6 According to the embodiment of the present application, an automatic oil pump assembly system 100 for installing an oil pump 200 to an engine block 300 is provided, which mainly comprises a frame 10, a first clamping device 20, a second clamping device 30, a tightening device 40, a mechanical arm 70 and a control device 80. The frame 10 comprises a first mounting portion 11 and a second mounting portion 12, and the first mounting portion 11 is connected to the second mounting portion 12. The first clamping device 20 is arranged on one side of the first mounting portion 11, the second clamping device 30 is arranged on one side of the second mounting portion 12, and the first clamping device 20 and the second clamping device 30 are arranged on the same side. The tightening device 40 is arranged on the second mounting portion 12 in cooperation with the second clamping device 30, and one end of the tightening device 40 towards the oil pump 200 penetrates through the second mounting portion 12. The mechanical arm 70 is connected to the side of the first mounting portion 11 away from the first clamping device 20. The control device 80 is electrically connected to the first clamping device 20, the second clamping device 30, the tightening device 40 and the mechanical arm 70 respectively.

[0061] In the prior art, after worker A visually inspects the position of the body 300, the position of the oil pump 200 with the six internal hexagonal cylindrical head screw assemblies is manually adjusted according to the connection posture of the oil pump 200 and the body 300, and then, according to the assembly feeling and experience, the two positioning pin sleeves of the joint surface of the oil pump 200 that cannot be visually inspected during the assembly process are uniformly and horizontally assembled into the body 300, the oil pump 200 body is not rotated, and then two screws are screwed in, so that the oil pump 200 does not fall during transportation to the next station. Then, worker B uses an electric tightening shaft to sequentially tighten the six internal hexagonal cylindrical head screws according to the process sequence, and this process is the oil pump 200 assembly process. However, the prior art has the following disadvantages: first, two people are needed for the oil pump 200 assembly link, which greatly affects the automation rate index in the modern assembly line. Second, under the condition of long-term manual transportation and side assembly, the workers will suffer from lumbar muscle strain to some extent. Finally, the rated torque of the internal hexagonal cylindrical head screw assembly is 23-28 N / m, and the workers use a bent electric tightening shaft to tighten the internal hexagonal cylindrical head screws around the oil pump 200. There is a certain probability that the head will not be fully recognized, which will cause the oil pump 200 gear to collide with the operator's back, resulting in an industrial accident.

[0062] Therefore, according to the oil pump automatic assembly system 100 of the present application, the process of clamping the oil pump 200 from the rack to the positioning plane by the first clamping device 20 coarsely positions the oil pump 200. Then, the oil pump 200 is finely positioned on the positioning plane. Finally, the second clamping device 30 clamps the oil pump 200 from the positioning plane to the body 300 of the engine to be assembled. When the oil pump 200 is installed to the body 300 to be assembled, the tightening device 40 tightens the screws that need to be tightened, and the oil pump 200 is installed to the body 300. In this process, the mechanical arm 70, the first clamping device 20, the second clamping device 30 and the tightening device 40 are controlled by the control device 80, which realizes the transformation from manual to automatic assembly.

[0063] It can be understood that, as shown in Figure 10 and Figure 11 , the first clamping device 20 includes a first clamping jaw 21 and a first positioning jaw 22, and the first clamping jaw 21 and the first positioning jaw 22 are arranged at one side of the first mounting portion 11.

[0064] Specifically, the first mounting portion 11 comprises a first connecting plate 111, a first limiting plate 113 and a reinforcing rib 112. The first connecting plate 111 and the first limiting plate 113 are oppositely arranged, one side of the reinforcing rib 112 is connected with the first connecting plate 111, and the other side of the reinforcing rib 112 is connected with the first limiting plate 113. This design has two advantages, one is that the strength of the first mounting portion 11 is improved by setting the reinforcing rib 112, and the weight is reduced, and the second advantage is that there is a certain space between the first connecting plate 111 and the first limiting plate 113, which can be used to accommodate the floating adjusting device 50, thereby reducing the space of the oil pump automatic assembly system 100. The first clamping jaw 21 and the first positioning jaw 22 are fixed on one side of the first limiting plate 113 through a pin structure, and the mechanical arm 70 is arranged on one side of the first connecting plate 111 through a positioning pin hole 1111 and a screw, so that the mechanical arm 70 can drive the rack 10 to move.

[0065] Specifically, the first clamping jaw 21 is composed of a three-jaw clamp 311 and a three-jaw cylinder 312. The three-jaw cylinder 312 is used to control the opening and closing of the three-jaw clamp 311, and the three-jaw clamp 311 is used to embrace the freely rotatable gear without being in close contact with the gear. The first positioning jaw 22 is composed of a cylinder and a clamping piece, the cylinder drives the clamping piece to contract inwardly, and clamps the oil pump. The first positioning jaw 22 is buckled to the groove profile outside the to-be-installed screw 201, and plays a role of limiting the rotation of the oil pump 200, without being in close contact with the shell of the oil pump 200. The first clamping device 20 can accommodate the position deviation of the oil pump 200 within 2mm.

[0066] It can be understood that the first clamping device 20 takes out the oil pump 200 from the AGV (mobile feeder) and places it on the plane of the positioning mechanism, which has a plane degree requirement of 0.01mm and a high smoothness requirement. When the positioning mechanism senses that the oil pump 200 is in place, the bottom plane of the oil pump 200 can be leveled, and then the connecting line direction of the two positioning pin sleeves at the bottom of the oil pump 200 can be respectively limited and clamped.

[0067] It can be understood that, as shown in Figure 12 to Figure 14 The second clamping device 30 comprises a second clamping jaw 31 and a second positioning jaw 32, wherein the second clamping jaw 31 and the second positioning jaw 32 are arranged on the second mounting portion 12 in a spaced manner.

[0068] Specifically, the second clamping jaw 31 is also composed of a three-jaw clamp 311 and a three-jaw cylinder 312. The three-jaw cylinder 312 is used to control the opening and closing of the three-jaw clamp 311, and the three-jaw clamp 311 is used to embrace the freely rotatable gear and tightly contact with the gear. The second positioning jaw 32 and the first positioning jaw 22 are different in structure. The second positioning jaw 32 includes a flat opening cylinder 321, a rhombic left finger 323 and a rhombic right finger 322. The flat opening cylinder 321 is used to control the opening and closing of the rhombic left finger 323 and the rhombic right finger 322. When the second clamping device 30 works, each clamping jaw of the three-jaw clamp 311 can cover at least the tooth top of three gears and tightly contact with the tooth top of the gears. The second positioning jaw 32 is opened by the rhombic left finger 323 and the rhombic right finger 322, so that the outer circle of the second positioning jaw 32 tightly contacts with and clamps the inner hole of the sixth screw hole of the oil pump 200 except the five to-be-installed screws, thereby realizing the positioning and clamping functions of the second positioning jaw 32.

[0069] Specifically, two bosses are arranged on each clamping jaw of the three-jaw clamp 311, and the middle of the two bosses is used to accommodate the gear of the oil pump 200.

[0070] It can be understood that the design principles of the first clamping device 20 and the second clamping device 30 are both based on the positioning principle of one side and two pins. The three-jaw clamp 311 restricts the radial freedom of the gear of the oil pump 200, and the first positioning jaw 22 or the second positioning jaw 32 restricts the rotational freedom of the gear of the oil pump 200. The first positioning jaw 22 and the first clamping jaw 21 jointly act on the oil pump to clamp the oil pump. The three-jaw clamp 311 and the second positioning jaw 32 jointly act on the oil pump 200 to firmly and stably clamp the oil pump 200. The three-jaw cylinder 312 and the three-jaw clamp 311 can meet the needs of clamping, moving or assembling of the oil pump 200 after force verification.

[0071] Specifically, as shown in Figure 2 to Figure 6 Specifically, the second mounting portion 12 includes a second connecting plate 122, a second limiting plate 121 and a third limiting plate 123 arranged in sequence and at intervals. The second connecting plate 122 is connected to the first mounting portion 11, and the third limiting plate 123 is connected to the second connecting plate 122 through a support 1231. The tightening device 40 passes through the third limiting plate 123 and is fixed on the third limiting plate 123. The second connecting plate 122 is provided with a second through hole 1221 (not shown in the drawings) for allowing one end of the tightening device 40 to pass through. The second limiting plate 121 is provided with a first through hole for allowing one end of the tightening device 40 to pass through. The second connecting plate 122 and the second limiting plate 121 are connected through a displacement assembly 13.

[0072] Specifically, in order to match the number of to-be-installed screws 201, the number of the tightening devices 40 is five. Therefore, the second through hole 1221 and the first through hole are respectively arranged at the corresponding positions of the second connecting plate 122 and the second limiting plate 121.

[0073] Specifically, the third limiting plate 123 is fixed on the second connecting plate 122 through the support 1231, the middle part of the tightening device 40 is fixed on the third limiting plate 123, the head part of the tightening device 40 passes through the second connecting plate 122 and the second limiting plate 121 in sequence, and finally contacts the to-be-installed screw 201 to tighten the screw.

[0074] Specifically, as shown in Figure 5 In order to cooperate with the tightening device 40 and guide it, five screw guiding sleeves 1211 are arranged on the second limiting plate 121, which are a first screw guiding sleeve 12111, a second screw guiding sleeve 12112, a third screw guiding sleeve 12113, a fourth screw guiding sleeve 12114 and a fifth screw guiding sleeve 12115. The ports of the five screw guiding sleeves 1211 are provided with flared surfaces 12110, which are used to accommodate the to-be-installed screw 201.

[0075] Specifically, the second connecting plate 122 and the second limiting plate 121 are connected through the displacement assembly 13, wherein the displacement assembly 13 includes a floating joint 131, a cylinder rod 132 and a cylinder body 133. The cylinder body 133 is arranged on the side of the second connecting plate 122 away from the second limiting plate 121, one end of the cylinder rod 132 is in the cylinder body 133, and the other end is provided with the floating joint 131. The floating joint 131 is fixedly connected with the second limiting plate 121, and the floating joint 131 compensates the error of the cylinder rod 132 in the process of stretching and retracting. The displacement assembly 13 can move the second limiting plate 121 away from the oil pump 200 before the second clamping device 30 works, so that the five to-be-installed screws 201 can be moved axially in the assembly process by the structure characteristics of the flared surfaces 12110 of the ports of the screw guiding sleeves 1211, so that the to-be-installed screws 201 do not deviate from the respective corresponding threaded holes and are given a certain axial movement space, so that the threaded ends of the to-be-installed screws 201 do not protrude from the joint surface of the oil pump 200 and interfere with the joint surface of the oil pump 200 and the engine body 300.

[0076] Specifically, the second connecting plate 122 and the second limiting plate 121 are further provided with a telescopic guide assembly 14, one end of the guide assembly 14 is connected with the second connecting plate 122, and the other end is connected with the second limiting plate 121. The guide assembly 14 includes a linear bearing 141, a guide rod 142 and a guide gasket 143. The linear bearing 141 is arranged on the side of the second connecting plate 122 facing the second limiting plate 121, and the second limiting plate 121 is provided with a guide hole 1212 corresponding to the guide assembly 14. The guide rod 142 is accommodated in the linear bearing 141, and the guide rod 142 is provided with the guide gasket 143 at one end of the linear bearing 141. The end of the guide rod 142 provided with the guide gasket 143 penetrates through the guide hole 1212 and is fixedly connected with the second limiting plate 121, and the guide gasket 143 is used to compensate for the wear caused by rigid connection.

[0077] Specifically, the second clamping jaw 31 and the first positioning jaw 22 are arranged at the side of the second limiting plate 121 away from the second connecting plate 122.

[0078] Specifically, the second limiting plate 121 is provided with two sensing devices on the side facing the oil pump 200, which are a first sensing device 60 and a second sensing device 61. When the second clamping device 30 approaches the oil pump 200 positioned by the secondary positioning mechanism, the first sensing device 60 will send a signal sensing the oil pump 200, and the signal will prompt the second clamping jaw 31 and the second positioning jaw 32 to work together. When the robot arm transports the oil pump 200 clamped to the rear end surface of the body 300 to assemble the oil pump 200, the second sensing device 61 sends a signal sensing the rear end surface of the body 300, so as to determine whether the second clamping device 30 completes the assembly of the oil pump 200.

[0079] It can be understood that, as shown in Figure 3 Due to the extremely small gap of the double-pin assembly of the oil pump 200, based on the overall mechanism and the comprehensive cumulative error of the robot arm, such assembly method has far exceeded the assembly error of the oil pump 200. In order to compensate for this error, a floating adjustment device 50 is used to flexibly compensate for the precision error. The floating adjustment device 50 is arranged between the first mounting portion 11 and the second mounting portion 12, and the first mounting portion 11 is connected with the second mounting portion 12 through the floating adjustment device 50.

[0080] Specifically, the floating adjusting device 50 includes a fixed plate 51, a floating cylinder 52, a plunger 53, a plunger holder 54, and an adjusting block 55. The floating cylinder 52 is fixed to the first connecting plate 111, and the floating end of the floating cylinder 52 is fixed to the two sides of the second connecting plate 122, respectively, for floating adjustment of the second clamping device 30 as a whole. The plunger holder 54 connected to the plunger 53 is connected to the first limiting plate 113. It can be seen that the plunger holder 54, the plunger 53, and the fixed end of the floating cylinder 52 are all fixed ends stably connected to the first mounting portion 11, and the floating end of the floating cylinder 52 and the adjusting block 55 are floating ends connected to the second mounting portion 12. When the floating end function of the floating cylinder 52 is turned on, the second clamping device 30 will sag due to its own weight. At this time, the adjusting block 55 is adjusted and supported by the plunger holder 54 and the plunger 53 of the fixed end, so as to offset the overall gravity of the second clamping device 30 and the adjusting block 55, thereby assisting in realizing the floating function of the floating adjusting device 50 in the radial direction of the gear of the oil pump 200.

[0081] It can be understood that when the oil pump 200 is horizontally assembled, the two positioning pin sleeves will deviate from the corresponding assembly holes of the engine block 300 due to the cumulative error. If the horizontal movement continues, the two positioning pin sleeves of the oil pump 200 cannot be correctly assembled and will generate resistance with the engine block 300, causing the control device 80 to alarm. Therefore, when programming the displacement of the mechanical arm 70, first move the assembly device with the oil pump 200 to the joint surface of the engine block 300, and make the chamfered end face of the oil pump 200 pin sleeve contact the chamfered end face of the pin hole of the engine block 300. At this time, the floating end function of the floating adjusting device 50 is turned on, so that the floating end has a displacement floating space in the radial direction of the gear of the oil pump 200. During the process of the mechanical arm 70 continuing to advance the assembly of the oil pump 200, the chamfered end face of the oil pump 200 pin sleeve will guide the centering, so that the center of the oil pump 200 pin sleeve approaches the center of the pin hole of the engine block 300. The mechanical arm 70 continues to advance the assembly of the oil pump 200, and the outer cylindrical surface of the oil pump 200 pin sleeve will be in close contact with the inner hole wall of the pin hole of the engine block 300, so as to complete the coincidence of the center of the oil pump 200 pin sleeve and the center of the pin hole of the engine block 300, thereby realizing the assembly of the oil pump 200.

[0082] It can be understood that, as shown in Figure 7 to Figure 9 , the tightening device 40 includes a pneumatic motor 401, a hexagonal ball head chuck 41, a slotted conical end set screw 42, a first needle bearing 43, a spring 44, a cylindrical pin 45, an output shaft 46, a second needle bearing 47, an input shaft 48, and a tightening shaft sleeve 49.

[0083] Specifically, after the assembly of the oil pump 200 is completed, the five inner hexagonal round to-be-installed screws 201 of the oil pump 200 are immediately tightened. The to-be-installed screw 201 has a cylindrical head outer cylindrical surface 2011.

[0084] Since the oil pump 200 is in a horizontal assembly posture, the to-be-installed screw 201 is also in a natural posture of falling in the threaded hole of the oil pump 200. When the first sensing device 60 sends a signal that the body of the oil pump 200 is assembled in place, the second clamping device 30 still maintains the assembly posture of the body of the oil pump 200 and continues to clamp the oil pump 200. When the shaft sleeve 49 is fixedly connected to the second connecting plate 122, the displacement assembly 13 of the second connecting plate 122 pulls the tightening shaft limiting plate 1232 to move towards the oil pump 200. In this process, the trumpet surface 12110 of the screw guide sleeve 1211 moves towards the center of the trumpet due to the contact with the outer cylindrical surface 2011 of the screw. The hexagonal ball head bit 41 first contacts the opening end of the cylindrical head of the screw through the outer hexagonal bit front end rounded surface, but the end surface of the cylindrical head of the screw does not reach the bottom end of the inner hole of the screw guide sleeve 1211. As the displacement assembly 13 continues to pull the tightening shaft limiting plate 1232, the threaded end surface of the screw abuts against the joint surface of the oil pump 200 and the engine block 300. The displacement assembly 13 continues to pull the tightening shaft limiting plate 1232, and the hexagonal ball head bit 41 is axially compressed together with the output shaft 46 according to the compression of the spring 44, until the end surface of the cylindrical head of the screw coincides with the bottom end of the inner hole of the screw guide sleeve 1211. At this time, the center line of the screw coincides with the center line of the threaded hole of the oil pump 200. The hexagonal ball head bit 41 is reversely rotated at a low speed through the reverse torque output by the pneumatic motor 401. The outer hexagonal surface of the front end of the outer hexagonal bit is attached to the inner hexagonal surface of the cylindrical head of the screw through the spring pressure and the friction between the threaded end surface of the screw and the joint surface of the engine block 300. The hexagonal ball head bit 41 is forward rotated at a high speed through the forward torque output by the pneumatic motor 401 driven by the program of the control device 80. The five to-be-installed screws 201 are tightened in place through the spring pressure, the chamfer of the threaded end of the screw, and the guiding effect of the chamfer of the threaded hole of the engine block 300.

[0085] Specifically, as shown in Figure 15 , the control device 80 is electrically connected with the first clamping device 20, the second clamping device 30, the first sensing device 60, the second sensing device 61, the mechanical arm 70, the floating device, and the tightening device 40. The control device 80 can be a PLC (programmable logic controller).

[0086] The embodiment also provides an automatic assembly method of the oil pump 200, which is applied to the automatic assembly system 100 of the oil pump and includes the following steps: Figure 16

[0087] The oil pump 200 is clamped from the rack to the positioning plane;

[0088] ​The oil pump 200 is clamped from the positioning plane to the mounting position of the to-be-mounted engine block 300, and the screws to be mounted on the oil pump 200 are aligned with the screw holes of the engine block 300;

[0089] The screws are tightened into the screw holes.

[0090] The present application has the following advantages:

[0091] Firstly, the oil pump 200 automatic assembly device and the oil pump 200 automatic assembly method of the present application realize the automatic positioning, assembly and fastening of the oil pump 200 by technology. The system can reduce the dependence on manual operation, improve the assembly efficiency and consistency, and reduce the labor intensity and the occurrence of human errors.

[0092] Secondly, based on the multi-machining feature of the oil pump 200, under the requirement of high-precision assembly, the funnel positioning method is adopted in the present embodiment. The funnel positioning method is a common positioning technology in the mechanical field, which is usually used to accurately place one object or workpiece to another position. This positioning method can be used in automated production lines, assembly processes and other applications requiring precise positioning. The basic principle of the funnel positioning method is to gradually guide the position of the workpiece to the target position, similar to the shape of a funnel. This process contains multiple stages, each stage is more precise than the previous stage, until the workpiece reaches the target position. This makes the present embodiment can accommodate the positioning accuracy of the feeding device in the production line scene, and can realize the horizontal flexible automatic assembly of the oil pump 200 under the condition of assembly cumulative error out-of-tolerance.

[0093] Finally, the non-standard screw guide sleeve 1211 is used to guide the hexagonal head screw in the axial direction, so as to assist in realizing the automatic cap tightening of the multiple screws and the threaded holes in the horizontal posture, improving the assembly production efficiency, and ensuring the automatic production. The assembly device in the present embodiment can be expanded to the assembly scene of the multi-angle hexagonal head screw.

[0094] The above is only the preferred embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical range disclosed by the present application can be easily thought by those skilled in the art, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An automatic oil pump assembly system for installing an oil pump onto the engine block, characterized in that, include: The frame includes a first mounting part and a second mounting part. The first mounting part includes a first connecting plate, a first limiting plate and a reinforcing rib. The second mounting part includes a second connecting plate, a second limiting plate and a third limiting plate arranged at intervals. The second connecting plate is connected to the first mounting part, and the third limiting plate is connected to the second connecting plate through a bracket. A first clamping device is disposed on one side of the first mounting portion; The second clamping device is disposed on one side of the second mounting portion, and the second clamping device is disposed on the same side as the first clamping device; A tightening device is provided on the second mounting part and cooperates with the second clamping device. The tightening device passes through the third limiting plate and is fixed on the third limiting plate. The second connecting plate is provided with a second through hole for one end of the tightening device to pass through. The second limiting plate is provided with a first through hole for one end of the tightening device to pass through. The second connecting plate and the second limiting plate are connected by a displacement component. A robotic arm, which is connected to the first mounting portion on the side away from the first gripping device; A control device, which is electrically connected to the first clamping device, the second clamping device, the tightening device, and the robotic arm; A floating adjustment device is disposed between a first mounting part and a second mounting part. The first mounting part is connected to the second mounting part through the floating adjustment device. The floating adjustment device includes a fixed plate, a floating cylinder, a plunger, a plunger bracket, and an adjustment block. The floating cylinder is fixedly connected to the fixed plate and the first connecting plate. The floating end of the floating cylinder and the adjustment block are respectively fixed to both sides of the second connecting plate. The plunger bracket connected to the plunger is connected to the first limiting plate. The displacement assembly includes a floating joint, a cylinder rod, and a cylinder body. The cylinder body is disposed on the side of the second connecting plate away from the second limiting plate. One end of the cylinder rod is located in the cylinder body, and the other end of the cylinder rod is provided with the floating joint. The floating joint is fixedly connected to the second limiting plate.

2. The automatic oil pump assembly system according to claim 1, characterized in that, The first clamping device includes a first gripper and a first positioning gripper, which are spaced apart and disposed on the same side of the first limiting plate.

3. The automatic oil pump assembly system according to claim 2, characterized in that, The second clamping device includes a second gripper and a second positioning gripper, which are spaced apart from each other in the second mounting portion.

4. The automatic oil pump assembly system according to claim 1, characterized in that, It also includes a sensing device, which is disposed on the side of the second mounting portion facing the oil pump.

5. The automatic oil pump assembly system according to claim 1, characterized in that, A retractable guide component is also provided between the second connecting plate and the second limiting plate. One end of the guide component is connected to the second connecting plate, and the other end of the guide component is connected to the second limiting plate.

6. The automatic oil pump assembly system according to claim 1, characterized in that, A screw guide sleeve is provided on the side of the second limiting plate facing the oil pump, and the screw guide sleeve is connected to the first through hole.

7. An automatic assembly method for an oil pump, characterized in that, The automatic oil pump assembly system according to any one of claims 1-6 includes the following steps: Clamp the oil pump from the material rack to the positioning plane; Clamp the oil pump from the positioning plane to the installation position of the machine body to be installed, and align the screws to be installed on the oil pump with the screw holes of the machine body; Tighten the screw into the screw hole.

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