Internal and external tooth assembling mechanism of a rotor and oil pump production equipment

Abstract

The application discloses a rotor inner and outer tooth assembling mechanism and an oil pump production device. The mechanism comprises a workbench, an inner and outer tooth press-fitting mechanism arranged on the workbench, the inner and outer tooth press-fitting mechanism comprising a transfer part arranged on the workbench top surface and a press-fitting part arranged above the transfer part. The transfer part comprises slide rail assemblies arranged on the workbench top surface, a rotor mold and an inner and outer tooth mold respectively slid on the slide rail assemblies, the press-fitting part comprises support assemblies arranged on both sides of the middle part of the slide rail assemblies and a press-fitting support platform, the press-fitting support platform is provided with a clamping and press-fitting assembly facing the slide rail assemblies, the clamping and press-fitting assembly moves up and down along the support assemblies, and the clamping and press-fitting assembly is provided with an inner tooth ring positioning part, an outer tooth ring positioning part and an inner and outer tooth bottom surface limiting part. The inner and outer tooth assembling mechanism can improve the assembling efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic production of oil pumps, in particular to an inner and outer tooth assembling mechanism of an oil pump rotor. BACKGROUND

[0002] In the production and assembly process of new energy vehicle oil pumps, the inner gear and the outer gear need to be installed on the rotor shaft of the oil pump rotor. Among them, the inner gear of the oil pump is tightly fitted with the rotor shaft, and the outer gear is eccentrically engaged with the inner gear. However, in the existing production program, since the outer gear is eccentrically engaged with the inner gear, the usual assembly steps are to first install the inner gear on the rotor shaft of the rotor, and then manually install the outer gear on the inner gear to achieve eccentric engagement. This assembly method will result in low assembly efficiency and high labor cost. Moreover, this assembly method cannot guarantee that the assembly posture of the outer gear remains consistent. As a result, when the next process, i.e. installing the pump head, is performed, a step of detecting and adjusting the posture needs to be added before installing the pump head. This further leads to a complicated production and assembly program, increased equipment manufacturing cost, and low production efficiency. SUMMARY

[0003] The present application aims to provide an inner and outer tooth assembling mechanism of an oil pump rotor with high installation precision and high efficiency.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical solution: an inner and outer tooth assembling mechanism of a rotor, characterized in that it comprises a workbench, an inner and outer tooth press-fitting mechanism is arranged on the workbench, the inner and outer tooth press-fitting mechanism comprises a transfer part arranged on the workbench top surface and a press-fitting part arranged above the transfer part; the transfer part comprises a slide rail assembly arranged on the workbench top surface and a rotor mold and an inner and outer tooth mold respectively slid on the slide rail assembly, the rotor mold and the inner and outer tooth mold are arranged in parallel, and the inner and outer tooth mold is located above the rotor mold; the press-fitting part comprises a support assembly arranged across the two sides of the middle part of the slide rail assembly, the support assembly is provided with a press-fitting support platform, the press-fitting support platform is provided with a clamping and press-fitting assembly facing the slide rail assembly, the press-fitting part is further provided with a press-fitting driving assembly, the press-fitting driving assembly drives the clamping and press-fitting assembly to move up and down along the support assembly, and the clamping and press-fitting assembly is provided with an inner gear inner ring positioning part, an outer gear outer ring positioning part and an inner and outer tooth height limiting part. With such a setting method, the inner gear and the outer gear can be eccentrically engaged in advance, then the clamping and press-fitting assembly of the inner and outer tooth press-fitting mechanism is used to clamp the inner and outer tooth and then press-fit it on the rotor shaft, and the inner gear inner ring, the outer gear outer ring and the upper and lower end faces of the inner and outer tooth assembly are positioned, so as to ensure the position precision of the inner and outer tooth. Through one process, the inner gear and the outer gear are simultaneously assembled on the rotor shaft, thereby improving the installation efficiency.

[0005] Further, the slide rail assembly includes a rotor slide rail assembly and an inner and outer tooth slide rail assembly, the slide rail assembly includes a slide rail support plate fixedly connected to the workbench top; the rotor slide rail assembly includes an inner double slide rail arranged on the slide rail support plate, a rotor slider arranged on the inner double slide rail, and the rotor mold arranged on the rotor slider, and further includes a rotor motor for driving the rotor slider to slide along the inner double slide rail; the inner and outer tooth slide rail assembly includes an outer double slide rail arranged on the slide rail support plate, an inner and outer tooth slider arranged on the outer double slide rail, and the inner and outer tooth mold arranged on the inner and outer tooth slider, and further includes a cylinder for driving the inner and outer tooth slider to slide along the outer double slide rail.

[0006] In order to further improve the positioning accuracy and facilitate the grabbing, the inner and outer tooth slider is provided with an inner and outer tooth mold bottom plate, the inner and outer tooth mold is arranged on the inner and outer tooth mold bottom plate, the outer tooth gear accommodating cavity is arranged on the inner and outer tooth mold, the transverse groove transversing the outer tooth gear accommodating cavity is arranged on the inner and outer tooth mold, the depth of the transverse groove is greater than the depth of the outer tooth gear accommodating cavity, and the width of the transverse groove is less than the outer diameter of the inner tooth gear.

[0007] In order to further improve the pressing accuracy, the rotor slider is provided with a rotor mold bottom plate, the rotor mold is a concave block and is fixed on the rotor mold bottom plate, one side of the concave block is provided with a rotor positioning hole, inner and outer tooth positioning claws are arranged on the left and right sides of the concave block on the mold bottom plate, the inner and outer tooth positioning claws include an inner side arc-shaped inner and outer tooth left positioning claw and an inner and outer tooth right positioning claw, an inner and outer tooth positioning claw sliding channel is arranged on one side of the rotor mold bottom plate, the inner and outer tooth left positioning claw and the inner and outer tooth right positioning claw are respectively slidably arranged on the inner and outer tooth positioning claw sliding channel through L-shaped sliders, and the inner and outer tooth left positioning claw and the inner and outer tooth right positioning claw are driven to move towards or away from each other by a cylinder; the two sides of the rotor mold are further provided with infrared sensing devices for position detection of the rotor end face and the inner and outer tooth end face.

[0008] Preferably, the support assembly includes four straight guide columns arranged on both sides of the slide rail assembly, the pressing support platform includes an upper fixed platform and a lower sliding platform, the upper fixed platform is fixedly installed at the top of the four straight guide columns, and a cylinder is installed on the top surface of the upper fixed platform, the lower sliding platform is fixedly connected with a sliding sleeve arranged outside the four straight guide columns, the lower sliding platform is connected with the piston of the cylinder, and the grabbing and pressing assembly is arranged on the bottom surface of the lower sliding platform.

[0009] To further ensure the position accuracy of the inner and outer tooth assembly during the pressing process, the grabbing and pressing assembly comprises an outer gear positioning column connected with the bottom surface of the lower sliding platform, the bottom surface of the outer gear positioning column is provided with two outer gear positioning petals opposite to each other, the inner side wall of the two outer gear positioning petals is an arc wall matched with the outer circle of the outer gear, the outer gear positioning column is provided with a stepped inner hole along the axis, the inner diameter of the upper hole of the stepped inner hole is larger than that of the lower hole, a spring is arranged in the upper hole, an inner gear positioning pin is arranged in the lower hole, the head of the inner gear positioning pin is located in the upper hole and abuts against the spring, the tail of the inner gear positioning pin extends out of the stepped inner hole, and the outer diameter of the pin column of the inner gear positioning pin is consistent with the inner diameter of the inner gear, the bottom surface of the lower sliding platform is connected with a vertical connecting plate on one side of the outer gear positioning column, the lower part of the vertical connecting plate is provided with a horizontal sliding way, an inner and outer tooth jaw is slidably arranged on the horizontal sliding way, the inner and outer tooth jaw comprises an inner and outer tooth left jaw and an inner and outer tooth right jaw, the inner and outer tooth left jaw and the inner and outer tooth right jaw comprise mutually parallel cantilever arms extending out of the outer gear positioning column from the horizontal sliding way, the tail end of the cantilever arm is provided with a downward L-shaped claw, the L-shaped claws of the inner and outer tooth left jaw and the inner and outer tooth right jaw are oppositely arranged and both face the axis of the inner gear positioning pin, the distance between the claw part of the L-shaped claws of the inner and outer tooth left jaw and the inner and outer tooth right jaw and the bottom surface of the outer gear positioning column is consistent with the height of the inner and outer tooth, and the inner and outer tooth left jaw and the inner and outer tooth right jaw are driven to move towards or away from each other by a cylinder.

[0010] To further detect the height of the gear, an inner and outer tooth height detection mechanism is further arranged on the workbench and located behind the inner and outer tooth pressing mechanism, the inner and outer tooth height detection mechanism comprises a vertical fixing frame fixed on the workbench, a height detection sensing device is arranged on the vertical fixing frame and slidably arranged on the vertical fixing frame and driven to slide up and down by a cylinder, the height sensing device comprises a plurality of vertically arranged sensing heads located on the same sensing plane, and the lower part of the height detection device is provided with a sliding rail, a rotor and an inner and outer tooth assembly mold slidably arranged on the sliding rail.

[0011] Preferably, an inner and outer tooth oil spraying mechanism is further arranged on the workbench and located behind the inner and outer tooth height detection mechanism, the inner and outer tooth oil spraying mechanism comprises an oil gun arranged on the workbench, and the lower part of the oil gun is a sliding rail, a rotor and an inner and outer tooth assembly mold slidably arranged on the sliding rail.

[0012] For further guaranteeing product reliability, a defective product recycling mechanism is further included, and the defective product recycling mechanism includes a press-fitting unqualified recycling chamber and a gear height unqualified recycling chamber.

[0013] An oil pump production equipment includes the inner and outer tooth assembly mechanism of the rotor.

[0014] Beneficial effects:

[0015] 1. The inner and outer tooth assembly mechanism of the rotor adopts a new assembly process, i.e., the inner gear and the outer gear are assembled into an inner and outer tooth assembly in advance before incoming materials, then the inner and outer tooth of the assembled inner and outer tooth is grabbed by the grabbing and pressing assembly of the inner and outer tooth pressing mechanism, and the grabbing and pressing assembly can position the inner circle (inner diameter) of the inner gear, the outer circle (outer diameter) of the outer gear, and the upper and lower end faces of the inner and outer tooth assembly, and then the inner and outer tooth assembly is assembled onto the rotor shaft of the rotor assembly at the same time, improving the installation precision and efficiency.

[0016] 2. The rotor slide rail assembly and the inner and outer tooth slide rail assembly can move the rotor assembly and the inner and outer tooth assembly to be in the same straight line with the center shaft of the grabbing and pressing assembly, and the inner and outer tooth slide block is located above the rotor slide block, so that the inner gear positioning pin can be accurately inserted into the inner gear center hole during grabbing, and the inner gear positioning pin is in abutment with the rotor shaft during pressing, thereby ensuring that the inner gear can be accurately sleeved on the rotor shaft, and further improving the installation precision.

[0017] 3. The height detection mechanism is provided in the present application, which detects the height of the top surface of the outer gear, and prepares for the subsequent pump shell installation. The outer gears that do not meet the gear height requirements are recycled and processed, improving the reliability of the product.

[0018] 4. The defective product recycling mechanism is provided in the present application, which recycles and processes defective products that are not press-fitted in place during the inner and outer tooth press-fitting process and defective products that do not meet the gear height requirements during the inner and outer tooth height detection process, further improving the reliability of the product. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the axial side view of the inner and outer tooth assembly mechanism of the rotor in the embodiment.

[0020] Figure 2 It is the top view of the inner and outer tooth assembly mechanism of the rotor in the embodiment.

[0021] Figure 3 It is the axial side view of the inner and outer tooth pressing mechanism.

[0022] Figure 4 This is an isometric view of the transfer section of the internal and external gear press-fitting mechanism;

[0023] Figure 5 This is a partial enlarged view of the internal and external toothed slide rail assembly of the transfer section;

[0024] Figure 6 This is a partial enlarged view of the slide rail assembly of the transfer section;

[0025] Figure 7 This is a front view of the internal and external tooth press-fitting mechanism;

[0026] Figure 8 for Figure 7 A sectional view;

[0027] Figure 9 View of the gripper and pressing components of the internal and external tooth pressing mechanism;

[0028] Figure 10 This is a cross-sectional view of the gripper and press-fit assembly;

[0029] Figure 11 This is an isometric view of the internal and external tooth height detection mechanism. Detailed Implementation

[0030] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. However, the present invention is not limited to these embodiments. Any improvements or substitutions based on the basic spirit of these embodiments shall still fall within the scope of protection claimed by the present invention.

[0031] Example: Figures 1-11 As shown, this embodiment provides a rotor internal and external gear assembly mechanism, mainly used to complete the process of installing the internal and external gear assembly 500 of the oil pump onto the rotor shaft 601 of the rotor assembly 600. The rotor internal and external gear assembly mechanism includes a worktable 100, on which an internal and external gear pressing mechanism 200 is provided. As another embodiment, an internal and external gear height detection mechanism 300 and an internal and external gear oil spraying mechanism 400 can also be provided on the worktable simultaneously. The internal and external gear height detection is used to detect the height of the external gears of the assembled rotor and internal and external gear assembly, identifying and recycling defective products; the internal and external gear oil spraying mechanism is used to spray oil for lubrication of the rotor and internal and external gear assembly that have passed the height detection. As another embodiment, a pump head assembly process can also be provided after the internal and external gear oil spraying mechanism on the worktable.

[0032] Specifically, a carrier conveying line 101 for product flow can be arranged on one side of the workbench top, an upper feeding and carrying module 102 and a lower feeding and carrying module 103 are arranged on the workbench top and are perpendicular to the carrier conveying line, and the upper feeding and carrying module and the lower feeding and carrying module are arranged at both ends of the carrier conveying line. A transfer carrying module 104 is further arranged between the upper feeding and carrying module and the lower feeding and carrying module, a first transverse work line 105 is arranged between the transfer carrying module and the upper feeding and carrying module, and a second transverse work line 106 is arranged between the transfer carrying module and the lower feeding and carrying module. The inner and outer tooth press-fitting mechanism is arranged at the first transverse work line, and the inner and outer tooth height detection mechanism and the inner and outer tooth oil injection mechanism are arranged at the second transverse work line. As another embodiment in the embodiment, a pump head assembling mechanism is further arranged behind the inner and outer tooth oil injection mechanism on the second transverse work line.

[0033] Among them, the carrier flow line, the first transverse work line and the second transverse work line all include a lower slide rail arranged on the workbench top and a lower slide block sliding on the lower slide rail, and a mold for carrying is arranged on the lower slide block, including a rotor mold and an inner and outer tooth mold. For the second transverse work line, since the inner and outer tooth has been installed on the rotor, only the rotor mold needs to be arranged, and the rotor mold at this time can also be called a rotor and inner and outer tooth assembly mold. In addition, the upper feeding and carrying module, the lower feeding and carrying module and the transfer carrying module all include a transverse frame arranged on the workbench top, an upper slide rail and an upper slide block are arranged on the transverse frame, a gripper for grabbing a rotor assembly and an inner and outer tooth assembly is arranged on the upper slide block, and the gripper moves up and down and moves left and right along the transverse frame through a cylinder / cylinder / oil cylinder / motor drive, so as to realize grabbing and moving the products on the carrier flow line, the first transverse work line and the second transverse work line. For the upper feeding and carrying module, two kinds of grippers for the inner and outer tooth assembly and the rotor assembly need to be arranged, and for the transfer carrying module and the lower feeding and carrying module, since the inner and outer tooth assembly has been installed on the rotor, only one kind of gripper for the rotor assembly needs to be arranged, and the rotor gripper at this time can also be called a rotor and inner and outer tooth assembly gripper.

[0034] Regarding the inner and outer tooth press-fitting mechanism 200, it includes a transfer part 201 arranged on the workbench top and a press-fitting part 202 arranged above the transfer part. The transfer part is the first transverse work line, which includes a slide rail assembly including a rotor slide rail assembly and an inner and outer tooth slide rail assembly. The rotor slide rail assembly is arranged in parallel with the inner and outer tooth slide rail assembly, and the inner and outer tooth slide rail assembly is located above the rotor slide rail assembly. Specifically, the slide rail assembly includes a slide rail support plate 203 fixed to the workbench top. The rotor slide rail assembly includes an inner double slide rail 204 arranged on the slide rail support plate, a rotor slide block 205 arranged on the inner double slide rail, and a rotor mold 206 arranged on the rotor slide block. The inner and outer tooth slide rail assembly includes an outer double slide rail 207 arranged on the slide rail support plate, an inner and outer tooth slide block 208 arranged on the outer double slide rail, and an inner and outer tooth mold 209 arranged on the inner and outer tooth slide block. The inner and outer tooth slide block is higher than the rotor slide block. In this embodiment, the rotor slide block and the inner and outer tooth slide block are driven to slide by a motor / cylinder / pneumatic cylinder / oil cylinder, etc. They can slide on the inner and outer double slide rails and stop at the feeding point and the press-fitting position, respectively. The rotor slide block can also stop at the discharging position.

[0035] The inner and outer tooth slide block is provided with an inner and outer tooth mold bottom plate 210, and the inner and outer tooth mold 209 is arranged on the inner and outer tooth mold bottom plate. The inner and outer tooth mold is provided with an outer gear accommodating cavity 211 and a transverse groove 212 transversing the outer gear accommodating cavity. The depth of the transverse groove is greater than the depth of the outer gear accommodating cavity, and the width of the transverse groove is less than the outer diameter of the inner gear. The rotor slide block is provided with a rotor mold bottom plate 213, and the rotor mold 206 is a concave block fixed on the rotor mold bottom plate. One side of the concave block is provided with a rotor positioning hole, and the mold bottom plate is provided with inner and outer tooth positioning claws on the left and right sides of the concave block. The inner and outer tooth positioning claws include an inner and outer tooth left positioning claw 214a with an arc-shaped inner side and an inner and outer tooth right positioning claw 214b. The rotor mold bottom plate is provided with an inner and outer tooth positioning claw sliding channel 215 on one side of the rotor mold. The inner and outer tooth left positioning claw and the inner and outer tooth right positioning claw are respectively arranged on the inner and outer tooth positioning claw sliding channel through L-shaped slide blocks 216. The inner and outer tooth left positioning claw and the inner and outer tooth right positioning claw are driven to move towards or away from each other by a pneumatic cylinder. The rotor mold is also provided with an infrared sensing device A for detecting the position of the rotor and an infrared sensing device B for detecting the position of the inner and outer tooth.

[0036] In addition, the pressing part 202 comprises a support assembly arranged across the middle of the double slide rail assembly, and a pressing support platform is arranged on the support assembly, and the pressing support platform is provided with a clamping and pressing assembly facing the slide rail assembly, and the pressing part is further provided with a pressing driving assembly, which drives the clamping and pressing assembly to move up and down along the support assembly. In the embodiment, the support assembly comprises four linear guide columns 217 arranged on both sides of the middle of the slide rail assembly, i.e. two linear guide columns are arranged on each side and arranged in a quadrilateral shape. The pressing support platform comprises an upper fixed platform 218 and a lower sliding platform 219, the upper fixed platform is fixedly installed at the top of the four linear guide columns, and an electric cylinder / cylinder / oil cylinder is installed on the top surface of the upper fixed platform, and an electric cylinder is used in the embodiment. The lower sliding platform is fixedly connected with a sliding sleeve 221 arranged outside the four linear guide columns, and the lower sliding platform is connected with the piston 222 of the electric cylinder / cylinder / oil cylinder or the output shaft of the motor, and the clamping and pressing assembly 223 is arranged on the bottom surface of the lower sliding platform. In the embodiment, the driving mechanism adopts an electric cylinder 220, and a cylinder is used to drive the lower sliding platform to slide up and down.

[0037] In the embodiment, the clamping and pressing assembly comprises an external gear positioning column 224 connected with the bottom surface of the lower sliding platform. The external gear positioning column is a columnar structure with two opposite side walls being flat and the other two opposite side walls being arc-shaped, and the bottom surface of the external gear positioning column is provided with two opposite external gear positioning petals 225, which are extended downward along the two opposite arc-shaped side walls of the external gear positioning column, and the inner side walls of the two external gear positioning petals are arc-shaped walls matched with the outer ring of the external gear. In addition, the external gear positioning column is provided with a stepped inner hole 226 along the axis, the inner diameter of the upper hole is larger than that of the lower hole, a spring 227 is arranged in the upper hole, and an internal gear positioning pin 228 is arranged in the lower hole, the head of the internal gear positioning pin is located in the upper hole and abuts against the spring, and the tail of the internal gear positioning pin extends out of the stepped inner hole, and the outer diameter of the pin column of the internal gear positioning pin is consistent with the inner diameter of the internal gear.

[0038] Moreover, the lower sliding platform bottom side is connected with a vertical connecting plate 229 on one side of the external gear positioning column, the lower part of the vertical connecting plate is provided with a transverse slide 230, an inner and outer tooth clamp jaw is slid on the transverse slide, the inner and outer tooth clamp jaw comprises an inner and outer tooth left clamp jaw 231a and an inner and outer tooth right clamp jaw 231b, the inner and outer tooth left clamp jaw and the inner and outer tooth right clamp jaw comprise mutually parallel cantilever arms extending from the transverse slide to the external gear positioning column, the tail end of the cantilever arms is provided with a downward L-shaped jaw, the L-shaped jaws of the inner and outer tooth left clamp jaw and the inner and outer tooth right clamp jaw are oppositely arranged and both face the axis of the inner tooth positioning pin, the distance between the jaw part of the L-shaped jaws of the inner and outer tooth left clamp jaw and the inner and outer tooth right clamp jaw and the bottom surface of the external gear positioning column is consistent with or slightly greater than the height of the inner and outer tooth, the inner and outer tooth left clamp jaw and the inner and outer tooth right clamp jaw move towards or away from each other through the driving of a pneumatic cylinder.

[0039] And, in the embodiment, the rotor slide rail assembly is driven by a motor, the rotor slider can slide on the inner double slide rail and stop at any position. The inner and outer tooth slide rail assembly is driven by a cylinder, limit blocks 232 are arranged on both sides of the middle part of the outer double slide rail, the limit blocks are used for limiting the inner and outer tooth slider, and the inner and outer tooth slider stops at the feeding station and the middle working point under the driving of the cylinder. When the rotor slider and the inner and outer tooth slider stop at the feeding station, the feeding and carrying module grabs, transversely moves and respectively places the rotor assembly and the inner and outer tooth assembly on the rotor mold on the rotor slider and the inner and outer tooth mold on the inner and outer tooth slider on the carrier flow line. When the rotor slider and the inner and outer tooth slider slide to the middle press-fitting station, the rotor slider stops under the action of the motor, the inner and outer tooth slider stops due to the limiting of the limit blocks, and the press-fitting station is located below the grabbing and press-fitting assembly. It needs to be ensured that when the rotor slider and the inner and outer tooth slider slide to the press-fitting station, the inner tooth gear positioning pin axis, the inner tooth gear axis of the inner and outer tooth assembly and the rotor shaft axis of the rotor assembly are on the same straight line. At this time, the electric cylinder on the upper fixed platform starts to drive the lower sliding platform to move downward through the piston. During the downward movement, the inner tooth gear positioning pin is inserted into the inner hole of the inner tooth gear to realize the positioning of the inner ring of the inner tooth gear, the two outer tooth gear positioning petals of the outer tooth gear positioning column position the outer ring of the outer tooth gear, and the inner and outer tooth clamping jaws including the inner and outer tooth left clamping jaw and the inner and outer tooth right clamping jaw are inserted into the transverse groove of the inner and outer tooth mold to hold up the inner and outer tooth assembly through the driving of the cylinder. Then the cylinder on the upper fixed platform starts to drive the lower sliding platform to move upward through the piston to realize the positioning and grabbing of the inner and outer tooth assembly. In the embodiment, the inner and outer tooth assembly that has been assembled is positioned through the inner tooth gear positioning pin and the outer tooth gear positioning column, and the height positioning and grabbing of the inner and outer tooth assembly are realized through the bottom surface of the inner and outer tooth clamping jaw and the outer tooth gear positioning column. After the positioning and grabbing of the inner and outer tooth assembly are completed, the inner and outer tooth slider slides to the feeding station under the driving of the cylinder to wait for the next work. The rotor slider continues to stop at the middle working point to wait for the press-fitting of the inner and outer tooth. After the inner and outer tooth assembly is grabbed by the grabbing and press-fitting assembly, the inner and outer tooth slider slides away, the cylinder on the upper fixed platform starts to drive the lower sliding platform to move downward under the action of the piston. During the downward movement, the inner tooth gear positioning pin abuts against the rotor shaft of the rotor assembly and retracts into the stepped inner hole and compresses the spring under the continuous downward movement of the lower sliding platform, and the inner and outer tooth assembly continues to move downward and is sleeved on the rotor shaft until the bottom surface of the inner and outer tooth assembly abuts against the end surface of the rotor assembly to stop the press-fitting action, and then the lower sliding platform is driven to move upward. In this way, the press-fitting action of the inner and outer tooth assembly to the rotor shaft of the rotor assembly is completed.And the rotor slider continues to slide to the unloading station through the motor drive after the inner and outer tooth press-fitting action is completed, and then is carried to the second transverse working line through the intermediate transfer module to continue the height detection action and the oil injection action.

[0040] As another embodiment in the present embodiment, the second transverse working line comprises a second transverse sliding rail, a slider, a rotor and an inner and outer tooth assembly mold are arranged on the second transverse sliding rail. Since the inner and outer tooth assembly has been installed on the rotor, the slider and the inner and outer tooth assembly mold in the present embodiment can directly use the rotor slider and the rotor mold in the inner and outer tooth press-fitting step, and the intermediate transfer module grasps, moves and places the rotor and the inner and outer tooth assembly on the rotor mold on the second transverse sliding rail. A height detection point is arranged on the second transverse sliding rail, and the inner and outer tooth height detection mechanism is arranged at the height detection point, the inner and outer tooth height detection mechanism comprises a vertical fixed frame 301 fixed on the workbench, a height detection sensing device 302 is arranged on the vertical fixed frame, the height detection sensing device is slidably arranged on the vertical fixed frame and is driven to slide up and down by a cylinder, and the height sensing device comprises a plurality of vertically arranged sensing heads 303 located on the same sensing plane. An oil injection point is further arranged on the second transverse sliding rail and located after the height detection point, and the inner and outer tooth oil injection mechanism is arranged on the workbench at the oil injection point, and the inner and outer tooth oil injection mechanism comprises an oil injection gun arranged on the workbench. Among them, the sensing head of the height detection mechanism is a distance sensor, and five sensing heads are arranged. When the height detection sensing device moves down and contacts the upper end surface of the outer gear, the height of the upper end surface of the outer gear can be detected through the distance detection of each sensing head. Whether it is the sensing head or the oil injection gun is prior art, and this embodiment will not be described here.

[0041] As another embodiment in the present embodiment, a pump head mounting point is further arranged on the second transverse sliding rail, the pump head mounting point is located after the oil injection point, a pump head mounting mechanism is arranged at the pump head mounting point, the pump head mounting mechanism adopts the same vertical fixed frame as the height detection mechanism, and a vertical pump head sliding rail is arranged on the vertical fixed frame, a pump head sliding block is arranged on the pump head sliding rail, a pump head gripper is arranged on the pump head sliding block, and the pump head sliding block can be driven to move up and down along the vertical fixed frame by a cylinder and install the pump head on the rotor and the inner and outer tooth assembly. Of course, the pump head mounting mechanism can also be arranged at other process positions. The pump head mounting is a conventional means, and the specific structure will not be described here.

[0042] As another embodiment in the present embodiment, a defective product recycling mechanism 700 is further included, which comprises a press-fitting unqualified recycling chamber 701 and a gear height unqualified recycling chamber 702. The press-fitting unqualified recycling chamber is connected with the intermediate transfer module through a first recycling conveying line 703. The press-fitting unqualified products are grabbed by the intermediate transfer module and placed on the first recycling conveying line and sent back to the press-fitting unqualified recycling chamber. The gear height unqualified recycling chamber is connected with the second transfer module through a second recycling conveying line. The outer gear height unqualified products are grabbed by the intermediate transfer module and placed on the second recycling conveying line and sent back to the gear height unqualified recycling chamber. In the present embodiment, the first transverse working line is provided with an infrared position detection device at the press-fitting position, which is used to detect the inner and outer tooth height positions after press-fitting. The rotor mold is further provided with a pressure feedback mechanism, which is used to feedback the pressure of the inner and outer teeth press-fitted on the rotor. After the press-fitting is completed, whether the press-fitting position and the press-fitting pressure are qualified needs to be detected. The unqualified products will be sent to the press-fitting unqualified recycling chamber. The pressure detection and the infrared position detection are both prior art, which will not be described in detail in the present embodiment.

[0043] The inner and outer tooth assembly mechanism of the rotor in the present embodiment is different from the prior art, which firstly installs the inner gear on the rotor shaft and then installs the outer gear eccentrically engaged on the inner gear. The present embodiment adopts a new assembly process, i.e. the inner and outer gears are assembled into an inner and outer tooth assembly before incoming material, and then the already assembled inner and outer teeth are grabbed by the grabbing and press-fitting assembly of the inner and outer tooth press-fitting mechanism in the present embodiment. The grabbing and press-fitting assembly in the present embodiment can position the inner circle (inner diameter) of the inner gear, the outer circle (outer diameter) of the outer gear, and the upper and lower end faces of the inner and outer tooth assembly, and then the inner and outer tooth assembly is simultaneously assembled on the rotor shaft of the rotor assembly, which improves the installation precision and efficiency. In the present embodiment, the press-fitting parameters are detected in real time. Once the defective product is found, it is immediately recycled.

[0044] In addition, since the inner and outer tooth assembly is installed on the rotor shaft of the rotor assembly at one time in the present embodiment, the position of the outer gear can be controlled at the same time, which facilitates the next process, i.e. the process of installing the pump head, to be carried out more smoothly.

[0045] The present embodiment further provides an oil pump production equipment, which comprises the above-mentioned inner and outer tooth assembly mechanism of the rotor. The above-mentioned is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in 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. A mechanism for assembling an inner and outer tooth of a rotor, characterized by: The workbench is provided with inner and outer tooth press-fitting mechanisms, which include a transfer part arranged on the workbench top and a press-fitting part arranged above the transfer part. The transfer part includes a slide rail assembly arranged on the workbench top and a rotor mold and an inner and outer tooth mold respectively slid on the slide rail assembly, which are arranged in parallel and the inner and outer tooth mold is above the rotor mold. The press-fitting part includes a support assembly arranged across the middle of the slide rail assembly, which is provided with a press-fitting support platform, which is provided with a clamping and press-fitting assembly towards the slide rail assembly, and a press-fitting driving assembly, which drives the clamping and press-fitting assembly to move up and down along the support assembly, and the clamping and press-fitting assembly is provided with an inner gear inner ring positioning part, an outer gear outer ring positioning part and an inner and outer tooth height limiting part. The slide rail assembly includes a rotor slide rail assembly and an inner and outer tooth slide rail assembly, which includes a slide rail support plate fixed to the workbench top, the rotor slide rail assembly includes an inner double slide rail arranged on the slide rail support plate, a rotor slide block arranged on the inner double slide rail and the rotor mold arranged on the rotor slide block, and a rotor motor driving the rotor slide block to slide along the inner double slide rail, and the inner and outer tooth slide rail assembly includes an outer double slide rail arranged on the slide rail support plate, an inner and outer tooth slide block arranged on the outer double slide rail and the inner and outer tooth mold arranged on the inner and outer tooth slide block, and a cylinder driving the inner and outer tooth slide block to slide along the outer double slide rail. The support assembly includes four linear guide columns arranged on both sides of the slide rail assembly, the press-fitting support platform includes an upper fixed platform and a lower sliding platform, the upper fixed platform is fixedly installed on the top of the four linear guide columns and the top surface of the upper fixed platform is provided with an electric cylinder, the lower sliding platform is fixedly connected with a sliding sleeve arranged outside the four linear guide columns, the lower sliding platform is connected with the output shaft of the electric cylinder, and the clamping and press-fitting assembly is arranged on the bottom surface of the lower sliding platform. The clamping and pressing assembly comprises an outer gear positioning column connected with the bottom surface of the lower sliding platform, the bottom surface of the outer gear positioning column is provided with two outer gear positioning petals opposite to each other, the inner side walls of the two outer gear positioning petals are arc walls matched with the outer ring of the outer gear; the outer gear positioning column is provided with a stepped inner hole along the axis, the inner diameter of the upper hole of the stepped inner hole is larger than that of the lower hole, a spring is arranged in the upper hole, an inner gear positioning pin is arranged in the lower hole, the head of the inner gear positioning pin is located in the upper hole and abuts against the spring, the tail of the inner gear positioning pin extends out of the stepped inner hole and the outer diameter of the pin column of the inner gear positioning pin is consistent with the inner diameter of the inner gear; the bottom surface of the lower sliding platform is connected with a vertical connecting plate on one side of the outer gear positioning column, the vertical connecting plate is provided with a horizontal sliding way at the lower part, an inner and outer tooth clamping jaw is slidably arranged on the horizontal sliding way, the inner and outer tooth clamping jaw comprises an inner and outer tooth left clamping jaw and an inner and outer tooth right clamping jaw, the inner and outer tooth left clamping jaw and the inner and outer tooth right clamping jaw comprise mutually parallel cantilever arms extending out of the outer gear positioning column from the horizontal sliding way, the tail ends of the cantilever arms are provided with downward L-shaped jaws, the L-shaped jaws of the inner and outer tooth left clamping jaw and the inner and outer tooth right clamping jaw are oppositely arranged and both face the axis of the inner gear positioning pin, the distance between the jaw part of the L-shaped jaws of the inner and outer tooth left clamping jaw and the inner and outer tooth right clamping jaw and the bottom surface of the outer gear positioning column is consistent with the height of the inner and outer tooth assembly, the inner and outer tooth left clamping jaw and the inner and outer tooth right clamping jaw are driven to move towards or away from each other by a cylinder.

2. The inner and outer tooth assembly mechanism of the rotor according to claim 1, characterized by: An inner and outer tooth mold bottom plate is arranged on the inner and outer tooth sliding block, an inner and outer tooth mold is arranged on the inner and outer tooth mold bottom plate, an outer gear accommodating cavity is arranged on the inner and outer tooth mold, a transverse groove transversing the outer gear accommodating cavity is arranged on the inner and outer tooth mold, the depth of the transverse groove is greater than that of the outer gear accommodating cavity, and the width of the transverse groove is less than the outer diameter of the inner gear.

3. The inner and outer tooth assembly mechanism of the rotor according to claim 2, characterized by: A rotor mold bottom plate is arranged on the rotor sliding block, the rotor mold is a concave block and is fixed on the rotor mold bottom plate, a rotor positioning hole is arranged on one side top surface of the concave block, inner and outer tooth positioning claws are arranged on the left and right sides of the concave block on the mold bottom plate, the inner and outer tooth positioning claws comprise an inner and outer tooth left positioning claw and an inner and outer tooth right positioning claw, the inner side surfaces of which are arc-shaped, an inner and outer tooth positioning claw sliding way is arranged on one side of the rotor mold on the rotor mold bottom plate, the inner and outer tooth left positioning claw and the inner and outer tooth right positioning claw are respectively slidably arranged on the inner and outer tooth positioning claw sliding way through L-shaped sliding blocks, and the inner and outer tooth left positioning claw and the inner and outer tooth right positioning claw are driven to move towards or away from each other by a cylinder; infrared sensing devices for detecting the positions of the rotor end surface and the inner and outer tooth end surface are further arranged on the two sides of the rotor mold.

4. The inner and outer tooth assembly mechanism of the rotor according to claim 1, 2 or 3, characterized in that: The height detection mechanism comprises a vertical fixing frame fixed on the workbench, a height detection sensing device arranged on the vertical fixing frame, the height detection sensing device being slidably arranged on the vertical fixing frame and being driven to slide up and down by a cylinder, and a plurality of sensing heads arranged vertically on the same sensing plane.

5. The inner and outer tooth assembly mechanism of the rotor according to claim 4, characterized by: The oil spraying mechanism comprises an oil spraying gun arranged on the workbench and located behind the height detection mechanism, and the lower part of the oil spraying gun is a slide rail, a rotor and a gear assembly mold slidably arranged on the slide rail.

6. The inner and outer tooth assembly mechanism of the rotor according to claim 5, characterized by: The defective product recycling mechanism comprises a press-fitting unqualified recycling chamber and a gear height unqualified recycling chamber, the press-fitting unqualified recycling chamber is connected with the inner and outer tooth press-fitting station through a first recycling conveying line, and the gear height unqualified recycling chamber is connected with the inner and outer tooth height detection station through a second recycling conveying line.

7. An oil pump production apparatus characterized by comprising: The inner and outer tooth assembly mechanism of the rotor according to any one of the preceding claims.

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