Needle assembling and grease injection stamping and flanging combined needle bearing assembling machine

Abstract

The present application relates to the field of needle bearing, especially a needle bearing assembling machine with needle assembling and grease injection stamping flanging functions, comprising a bearing mechanism, a needle assembling and pressing mechanism and a stamping and grease injection mechanism, a first lifting mechanism is arranged on the bearing mechanism and connected with the stamping and grease injection mechanism, a rotary lifting auxiliary mechanism is arranged on the outer ring moving track directly below the stamping and grease injection mechanism and cooperates with the stamping and grease injection mechanism to assist in quantitative grease injection into the bearing, stamping flanging and driving the needle to rotate for auxiliary lubrication, a second lifting mechanism is arranged on the bearing mechanism and connected with the needle assembling and pressing mechanism, an auxiliary needle assembling mechanism is arranged on the outer ring moving track directly below the needle assembling and pressing mechanism and cooperates with the needle assembling and pressing mechanism to trigger the holding frame to be grabbed and assist in needle assembling on the holding frame. The present application integrates the needle assembling, grease injection and stamping flanging processes in one device, realizes continuous automatic operation and significantly reduces the handling and intervention between processes.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of needle roller bearings, in particular to a needle roller bearing assembly machine with needle assembling and grease injection and stamping flanging functions. BACKGROUND

[0002] Needle roller bearings are widely used in automotive transmission systems, engineering machinery and other fields due to their compact structure and strong load-carrying capacity. The assembly process needs to complete two core processes: one is to accurately assemble the needle into the cage and combine it with the bearing outer ring (needle assembling process), and the other is to inject lubricating grease into the bearing and stamp the flange on the bearing outer ring (grease injection and stamping flanging process). The precision and coordination of the two processes directly determine the assembly quality and service life of the bearing.

[0003] Currently, existing needle roller bearing assembly equipment is mostly designed independently for single process. The needle assembling process relies on a dedicated needle assembling machine, while the grease injection and stamping flanging process requires the semi-finished product to be transferred to another machine. This separate design not only increases the handling time and cost between processes, but also easily causes damage to the parts during handling, affecting product quality. In addition, the connection between processes often requires additional manual intervention or complex conveying lines, reducing overall production efficiency and making it difficult to meet the needs of mass production.

[0004] In the grease injection and stamping flanging process, existing technologies usually use manual or semi-automatic grease injection methods, which are difficult to accurately control the amount of grease, easily causing grease waste or uneven lubrication. The existing equipment cannot realize the coordinated operation of needle assembling and grease injection and stamping flanging, and it is difficult to ensure the uniform distribution of grease in the needle, cage and inner wall of the bearing outer ring. SUMMARY

[0005] The present application aims to solve the above-mentioned defects and provides a needle roller bearing assembly machine with needle assembling and grease injection and stamping flanging functions.

[0006] In order to overcome the defects in the background art, the technical scheme adopted by the present application to solve its technical problems is as follows: a needle roller bearing assembly machine with needle assembling and grease injection and stamping flanging functions, comprising a bearing mechanism, a outer ring moving track is horizontally arranged on the bearing mechanism, an outer ring moving mechanism is arranged on the outer ring moving track for driving the bearing outer ring to move forward along the track by a fixed displacement;

[0007] a stamping and grease injection mechanism is installed on the bearing mechanism, a first lifting mechanism is arranged on the bearing mechanism for connection above the stamping and grease injection mechanism, a rotary lifting auxiliary mechanism is arranged on the outer ring moving track directly below the stamping and grease injection mechanism, the rotary lifting auxiliary mechanism cooperates with the stamping and grease injection mechanism for docking to assist in quantitative grease injection and stamping flanging in the bearing and to drive the needle to rotate in the bearing outer ring for auxiliary lubrication;

[0008] The needle mounting and pressing mechanism is arranged on the bearing mechanism, a second lifting mechanism is arranged above the needle mounting and pressing mechanism, an auxiliary needle mounting mechanism is arranged on the outer ring moving track below the needle mounting and pressing mechanism, the needle mounting and pressing mechanism is matched with the auxiliary needle mounting mechanism, the needle mounting and pressing mechanism is used for triggering the holding frame to be gripped, and the auxiliary needle mounting mechanism is used for mounting the needle on the holding frame.

[0009] Further improvement, the bearing mechanism comprises vertically distributed vertical plates, a window is arranged at the middle position of the vertical plate, an outer ring moving track is arranged on the inner bottom surface of the window, and the outer ring moving track and the vertical plate are connected through a reinforcing rib.

[0010] Further improvement, the outer ring moving mechanism comprises two outer ring moving plates which are symmetrically arranged on the outer ring moving track and axially slide along the outer ring moving track, and two outer ring clamping plates which are correspondingly arranged on the inner side of the outer ring moving plate and placed on the outer ring moving track, a clamping driving unit is fixedly arranged on each outer ring moving plate, the output end of the clamping driving unit is connected with the outer ring clamping plate, the clamping driving unit is used for driving the outer ring clamping plate to make opening and closing movement along the outer ring moving track in the radial direction, a plurality of clamping notches are equidistantly arranged on the opposite surfaces of the two outer ring clamping plates and along the axial direction of the outer ring moving track, and a reciprocating driving unit is arranged on the outer ring moving track and connected with the outer ring moving plate.

[0011] Further improvement, the clamping notches adopt V-shaped structure, isosceles trapezoidal structure or arc-shaped structure which is matched with the outer ring of the bearing.

[0012] Further improvement, the stamping and grease injection mechanism comprises a stamping column, a stamping flange groove matched with the profile of the outer ring of the bearing is arranged at the center of the lower end of the stamping column, an axial channel is axially and throughly arranged in the stamping column, an annular grease injection accommodating cavity is coaxially arranged in the stamping column, a piston is arranged in the grease injection accommodating cavity and precisely matched with the cavity wall, the lower end of the grease injection accommodating cavity is communicated with the stamping flange groove through a grease conveying channel, the upper end of the grease injection accommodating cavity is communicated with the outside through an air channel, a gas inlet is arranged at the outlet position of the air channel, and a grease injection connector is arranged on the side wall of the stamping column and communicated with the grease injection accommodating cavity.

[0013] Further improvement, the top of the stamping column is connected with one end of a T-shaped guide column, the other end of the T-shaped guide column is slidingly connected with a connecting seat, and a force sensor is arranged on the lower surface of the connecting seat.

[0014] Further improvements, including the rotating lifting auxiliary mechanism comprises rotating lifting unit one and rotating auxiliary column, the rotating auxiliary column is vertically arranged on the upper part of rotating lifting unit one to drive the rotating auxiliary column up and down and rotate, the top end of the rotating auxiliary column is a hemispherical structure, the outer ring moving track is provided with a through guide hole at the corresponding position of the rotating auxiliary column, and the rotating auxiliary column is precisely embedded in the matching groove opened on the inner bottom surface of the stamping flanging groove after passing through the guide hole.

[0015] Further improvements, including the needle mounting and pressing mechanism comprises a vertically arranged pressing cylinder, a moving column coaxially arranged in the pressing cylinder and two symmetrically arranged needle feeding units arranged on the side surface of the pressing cylinder, the upper end of the pressing cylinder is a closed end plate, the lower end is an open port, and the upper end of the moving column is coaxially arranged with a limiting cylinder, and the limiting cylinder axially penetrates the closed end plate at the upper end of the pressing cylinder, and the limiting cylinder is configured with an annular flange with a larger diameter at both ends, and the limiting cylinder is externally sleeved with a pressure spring, and the pressure spring is located in the pressing cylinder, the upper end of the pressure spring abuts against the inner side of the closed end plate of the pressing cylinder, and the lower end abuts against the top surface of the moving column, a plurality of arc-shaped grooves are equidistantly arranged on the outer peripheral surface of the lower end of the moving column along the axial direction, and a containing groove is arranged on the inner bottom surface of each arc-shaped groove, a clamping block is fitted and mounted in the containing groove, a moving cavity is axially arranged in the moving column, a rectangular counterweight column is fitted and mounted in the moving cavity, the upper part of the moving cavity is in communication with the central air cavity, the central air cavity is in communication with the containing groove through the communication hole, and the moving column is provided with an electric air release valve for releasing air in the central air cavity.

[0016] Further improvements, including the auxiliary needle mounting mechanism comprises rotating lifting unit two and a rectangular column, the rectangular column is vertically arranged above the rotating lifting unit two, the outer ring moving track is provided with a rectangular guide hole at the position corresponding to the rectangular column, and the top end of the rectangular column penetrates through the rectangular guide hole and is matched and connected with the butt joint groove opened at the bottom end of the rectangular counterweight column in the bearing outer ring through the bearing outer ring.

[0017] The beneficial effects of the present application are: the design integrates the three processes of needle mounting, grease injection and stamping flanging into one equipment, realizes continuous automatic operation, significantly reduces the handling and manual intervention between processes, improves production efficiency, reduces cost and risk of collision, the needle mounting and pressing mechanism and the auxiliary needle mounting mechanism work cooperatively to realize the grasping of the retainer and the mounting of the needle on the retainer, ensure the installation precision of the needle, improve the quality and consistency of the bearing assembly as a whole, the rotating lifting auxiliary mechanism and the stamping and grease injection mechanism work cooperatively to realize the injection of grease into the bearing and the stamping flanging and auxiliary lubrication, the auxiliary grease is uniformly distributed on the needle, the retainer and the inner wall of the outer ring, the lubrication effect is improved, the stamping flanging and the grease injection process are closely connected, the grease overflow is avoided, and the complete packaging is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] The application will be further described in connection with the drawings and examples.

[0019] Figure 1 is the front view in the application;

[0020] Figure 2 is the interfacing side view of the needle loading and pressing mechanism and the auxiliary needle loading mechanism;

[0021] Figure 3 is Figure 2 A enlarged view in the application;

[0022] Figure 4 is the rear view in the application;

[0023] Figure 5 is the interfacing side view of the stamping and injecting mechanism and the rotary lifting auxiliary mechanism;

[0024] Figure 6 is Figure 5 B enlarged view in the application;

[0025] Figure 7 is the plan view of the outer ring moving mechanism in the application;

[0026] 1 - bearing mechanism, 2 - outer ring moving mechanism, 3 - first lifting mechanism, 4 - stamping and injecting mechanism, 5 - outer ring moving track, 6 - rotary lifting auxiliary mechanism, 7 - needle loading and pressing mechanism, 8 - second lifting mechanism, 9 - auxiliary needle loading mechanism;

[0027] 101 - vertical plate, 102 - window, 103 - reinforcing rib;

[0028] 201 - reciprocating driving unit, 202 - outer ring moving plate, 203 - clamping driving unit, 204 - clamping notch, 205 - outer ring clamping plate;

[0029] 401 - injecting joint, 402 - stamping column, 403 - air channel, 404 - air supply joint, 405 - connecting seat, 406 - T-shaped guide column, 407 - force sensor, 408 - piston, 409 - injecting accommodating cavity, 410 - stamping flanging groove, 411 - axial passage, 412 - matching groove, 413 - injecting passage;

[0030] 601 - rotary lifting unit one, 602 - rotary auxiliary column;

[0031] 701 - needle feeding unit, 702 - moving column, 703 - pressurizing spring, 704 - limiting cylinder, 705 - electric air release valve, 706 - pressing cylinder, 707 - arc-shaped groove, 708 - moving cavity, 709 - accommodating groove, 710 - rectangular counterweight column, 711 - central air cavity, 712 - communication hole, 713 - interfacing groove, 714 - clamping block;

[0032] 901-rotating lifting unit two, 902-rectangular column. DETAILED DESCRIPTION

[0033] To make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without creative labor are within the protection scope of the present application.

[0034] Reference Figure 1 And Figure 4 A needle assembling and grease punching and flanging combined needle bearing assembling machine comprises a bearing mechanism 1 serving as a support base of the whole device, on which a outer ring moving track 5 is horizontally arranged, and an outer ring moving mechanism 2 is arranged on the outer ring moving track 5, which is used to drive the bearing outer ring to move forward along the track by a fixed displacement, so as to ensure that the outer ring can be accurately conveyed to the subsequent punching and greasing station and needle assembling station each time.

[0035] A punching and greasing mechanism 4 is installed on the bearing mechanism 1, and a first lifting mechanism 3 is arranged on the bearing mechanism 1 for connecting with the punching and greasing mechanism 4 above, which is used to drive the punching and greasing mechanism 4 to move up and down, punch and flange the bearing outer ring, and a rotating and lifting auxiliary mechanism 6 is arranged on the outer ring moving track 5 directly below the punching and greasing mechanism 4, which cooperates with the punching and greasing mechanism 4 to assist in the quantitative greasing and punching and flanging of the bearing, and to drive the needle to rotate in the bearing outer ring to assist in lubrication, so that the grease is uniformly coated on the surface of the needle, the retainer and the inner wall of the bearing outer ring.

[0036] A needle assembling and pressing mechanism 7 is arranged on the bearing mechanism 1, and a second lifting mechanism 8 is arranged on the bearing mechanism 1 for connecting with the needle assembling and pressing mechanism 7 above, which is used to drive the needle assembling and pressing mechanism 7 to move up and down, press the bearing outer ring and grab the retainer, and after the needle is assembled on the retainer, the whole is sent into the bearing outer ring, and an auxiliary needle assembling mechanism 9 is arranged on the outer ring moving track 5 directly below the needle assembling and pressing mechanism 7, which cooperates with the needle assembling and pressing mechanism 7 to trigger the needle assembling and pressing mechanism 7 to grab the retainer and assist the needle assembling and pressing mechanism 7 to assemble the needle on the retainer.

[0037] In specific embodiments, reference is made to Figure 4, the bearing mechanism 1 includes vertically distributed vertical plates 101, a window 102 is formed in the middle of the vertical plates 101, an outer ring moving track 5 is installed on the inner bottom surface of the window 102, the outer ring can pass through the window smoothly along the track, in order to enhance the rigid support, the outer ring moving track 5 and the vertical plate 101 are connected through a reinforcing rib 103, this structure can effectively inhibit the deformation of the track, and ensure the stability of the bearing outer ring in the transmission and processing process, each functional unit is separately arranged on both sides of the vertical plate: the first lifting mechanism 3, the stamping and lubricating mechanism 4 and the rotating lifting auxiliary mechanism 6 are located on one side of the vertical plate 101; and the second lifting mechanism 8, the needle mounting and pressing mechanism 7 and the auxiliary needle mounting mechanism 9 are located on the other side, in a further embodiment, as an integrated design, an integrated flow channel can also be processed in the vertical plate 101, which is used for regularly arranging the air or oil pipeline required by the first lifting mechanism 3 and the second lifting mechanism 8.

[0038] In specific embodiments, referring to Figure 4 and Figure 7 , the outer ring moving mechanism 2 includes two outer ring moving plates 202 symmetrically arranged on the outer ring moving track 5 and axially slidingly arranged along the outer ring moving track 5, and two outer ring clamping plates 205 correspondingly installed on the inner side of the outer ring moving plate 202 and placed on the outer ring moving track 5, a clamping driving unit 203 (a micro air cylinder or an electric push rod can be used) is fixedly installed on each outer ring moving plate 202, the output ends of the clamping driving units 203 are respectively connected with the outer ring clamping plates 205, and the clamping driving units 203 are used for driving the outer ring clamping plates 205 to make opening and closing movements (namely, moving close to or away from the center of the track) along the outer ring moving track 5, a plurality of clamping notches 204 are axially equidistantly formed on the opposite surfaces of the two outer ring clamping plates 205 and along the outer ring moving track 5, when the clamping driving units 203 drive the two outer ring clamping plates 205 to move towards each other, the bearing outer rings are clamped into the clamping notches 204, and the synchronous positioning and clamping of the plurality of bearing outer rings (preventing the outer ring from deviating during movement) are realized; when the clamping driving units 203 drive the two outer ring clamping plates 205 to move reversely, the notches are separated from the outer rings, and the clamping state is released; a reciprocating driving unit 201 is arranged on the outer ring moving track 5, the reciprocating driving unit 201 is connected with the outer ring moving plate 202, and is used for driving the outer ring moving plate 202 to make intermittent reciprocating movement along the outer ring moving track 5, through this structural design, the accurate, synchronous and intermittent conveying of the plurality of bearing outer rings along the track is realized.

[0039] Further embodiments, the clamping notch 204 preferably has the following three structures, each of which is adapted to different scene requirements: V-shaped structure: the inclined surface can adapt to different diameter bearing outer rings, and the inclined surface self-locking feature can prevent the outer ring from sliding axially, which is suitable for general production of multi-specification outer rings; isosceles trapezoidal structure: its planar contact characteristics can increase the contact area with the outer ring, especially suitable for bearing outer rings with steps, which can simultaneously limit the radial deviation and circumferential rotation of the outer ring, and the clamping stability is better; and the arc-shaped structure that fits the bearing outer ring: the inner arc radius is completely matched with the outer circle radius of the target bearing outer ring, which can realize full-arc fitting of the outer circle of the outer ring, avoid causing indentation or deformation to the surface of the outer ring during clamping, and is suitable for clamping of bearing outer rings with high surface precision.

[0040] In specific embodiments, with reference to Figure 4 , Figure 5 and Figure 6 , the stamping and lubricating mechanism 4 includes a stamping column 402, the lower end of which is provided with a stamping flanging groove 410 matched with the profile of the bearing outer ring, for accommodating the bearing outer ring during stamping and realizing flanging forming of the edge of the outer ring slot, an axial passage 411 is axially provided in the interior of the stamping column 402, the upper end of the axial passage 411 is communicated with the atmosphere, and the lower end is communicated with the interior of the stamping flanging groove 410, which can balance the air pressure in the groove during stamping, an annular injection accommodating cavity 409 is coaxially provided in the interior of the stamping column 402, a piston 408 that precisely fits the cavity wall is arranged in the injection accommodating cavity 409, the piston 408 can reciprocate axially along the cavity, the lower end of the injection accommodating cavity 409 is communicated with the stamping flanging groove 410 through a grease delivery passage 413, and the upper end is communicated with the outside through an air passage 403, a gas connector 404 is arranged at the outlet position of the air passage 403, the gas connector 404 is connected with an external air pressure control system through a pipeline, which can drive the piston 408 to move downward, extruding the grease in the injection accommodating cavity 409 into the stamping flanging groove 410 through the grease delivery passage 413, a grease injection connector 401 is arranged on the side wall of the stamping column 402 and communicated with the injection accommodating cavity 409, the grease injection connector 401 is connected with an external quantitative grease injection equipment through a high-pressure oil pipe, which can supplement a preset amount of grease into the cavity, the stamping column 402 is connected with the rotating lifting auxiliary mechanism 6, the grease delivery passage 413 can inject grease into the bearing outer ring, at this time the rotating lifting auxiliary mechanism 6 drives the roller pin to rotate, and cooperates with the fluidity of the grease to realize uniform coverage of the surface of the roller pin, the surface of the retainer and the inner wall of the outer ring.

[0041] When the first lifting mechanism 3 drives the stamping cylinder 402 to continue to descend and stamp the bearing outer ring, the outer ring flanging part will accurately block the outlet of the grease channel 413. At this time, the external grease injection device injects new grease into the grease containing cavity 409 through the grease injection joint 401, pushes the piston 408 to float to the highest position of the cavity, and the injected grease in the bearing can cool the bearing outer ring heated after stamping flanging through heat conduction, avoiding the influence of high temperature on the performance of the grease.

[0042] Further embodiments, to detect the stamping force in real time during the stamping process to ensure the accuracy of the flanging, the top of the stamping cylinder 402 is connected with one end of the T-shaped guide column 406, the other end of the T-shaped guide column 406 is slidingly connected with the connecting seat 405, the connecting seat 405 moves freely along the T-shaped guide column 406, and the lower surface of the connecting seat 405 is installed with a force sensor 407, the sensing surface of the force sensor 407 is opposite to the top of the stamping cylinder 402, and the connecting seat 405 is connected with the output end of the first lifting mechanism 3, forming a force transmission carrier. In the non-stamping state, due to the gravity of the stamping cylinder 402, the T-shaped guide column 406 moves downward as a whole, the top of the stamping cylinder 402 keeps a certain distance from the sensing surface of the force sensor 407, and the force sensor 407 has no signal output. When the stamping step is performed, the first lifting mechanism 3 drives the connecting seat 405 to move downward, the force sensor 407 moves downward and contacts with the top of the stamping cylinder 402, at this time, the driving force of the first lifting mechanism 3 is transmitted to the stamping cylinder 402 through the connecting seat 405 and the force sensor 407, and the force sensor 407 detects and outputs the stamping force value in real time, ensuring that the stamping flanging force meets the preset parameters.

[0043] Specific embodiments, the rotating lifting auxiliary mechanism 6 includes rotating lifting unit one 601 and rotating auxiliary column 602 integrated rotating and lifting functions, the rotating auxiliary column 602 is vertically arranged on the upper part of rotating lifting unit one 601 to drive rotating auxiliary column 602 up and down and rotate, the top of rotating auxiliary column 602 is a hemispherical structure, which can reduce the contact stress when inserted with the needle, the outer ring moving track 5 is provided with a through guide hole at the corresponding position of rotating auxiliary column 602, and rotating auxiliary column 602 is precisely inserted into the matching groove 412 provided on the inner bottom surface of the stamping flanging groove 410 after passing through the guide hole; in operation, rotating lifting unit one 601 drives rotating auxiliary column 602 to rotate and slowly rise at the same time: the top hemispherical structure can adaptively push away the needle through the spherical surface guide effect, ensuring that rotating auxiliary column 602 is smoothly inserted between the needles; after insertion, the cylindrical surface of rotating auxiliary column 602, the bearing outer ring and the inner wall of the stamping flanging groove 410 form a sealed space, effectively limiting the overflow of oil, ensuring that the output oil can completely enter the gap between the needle, retainer and bearing outer ring; after the stamping flanging is completed, rotating lifting unit one 601 drives rotating auxiliary column 602 to rotate and slowly descend at the same time, which drives the needle to rotate synchronously through friction, so that the oil is evenly attached to each contact surface until the oil is pushed out of the bearing.

[0044] Specific embodiments, referring to Figure 1 、 Figure 2 and Figure 3The needle mounting and pressing mechanism 7 comprises a vertical pressing cylinder 706, a moving column 702 coaxially arranged in the pressing cylinder 706, and two symmetrically arranged needle feeding units 701 arranged on the side surfaces of the pressing cylinder 706. The upper end of the pressing cylinder 706 is a closed end plate, and the lower end is an open port. The upper end of the moving column 702 is coaxially arranged with a limiting cylinder 704, and the limiting cylinder 704 axially penetrates the closed end plate at the upper end of the pressing cylinder 706. The limiting cylinder 704 is configured with an annular flange with a larger diameter than the cylinder body at both ends. This structure of the limiting cylinder 704 plays a guiding and limiting movement role for the moving column 702. The limiting cylinder 704 is externally sleeved with a pressurizing spring 703, and the pressurizing spring 703 is located in the pressing cylinder 706. The upper end of the pressurizing spring 703 abuts against the inner side of the closed end plate of the pressing cylinder 706, and the lower end abuts against the top surface of the moving column 702, for providing a downward pre-pressure for the moving column 702. A plurality of arc-shaped grooves 707 (the number of grooves is consistent with the number of needles) are equidistantly formed on the outer peripheral surface of the lower end of the moving column 702 along the axial direction, for temporarily positioning the to-be-mounted needle. A receiving groove 709 is formed on the inner bottom surface of each arc-shaped groove 707. A clamping block 714 is fitted and installed in the receiving groove 709. A moving cavity 708 is formed in the moving column 702 along the axial direction. A rectangular counterweight column 710 is fitted and installed in the moving cavity 708. The upper part of the moving cavity 708 is in communication with a central air cavity 711. The central air cavity 711 is in communication with the receiving groove 709 through a communication hole 712, forming an air pressure transmission channel. An electric air release valve 705 is installed on the moving column 702 to release air in the central air cavity 711.

[0045] During operation, the auxiliary needle mounting mechanism 9 penetrates into the moving cavity 708 and is in abutment with the rectangular counterweight column 710. The rectangular counterweight column 710 is pushed upward, and the air in the moving cavity 708 is compressed during the upward movement of the rectangular counterweight column 710. The gas enters the receiving groove 709 through the central air cavity 711 and the communication hole 712, pushes the clamping block 714 to radially extend and accurately insert into the window of the retainer, and realizes positioning and grabbing of the retainer. At the same time, the auxiliary needle mounting mechanism 9 drives the moving column 702 to rotate, so that the retainer of the to-be-mounted needle rotates synchronously with the moving column 702. In cooperation with the pushing action of the needle feeding unit 701, the needle is accurately pushed into the window of the retainer one by one, and after the needle mounting is completed, the needle pushes the clamping block 714 into the receiving groove 709, and the retainer loaded with the needle falls into the bearing outer ring.

[0046] In specific embodiments, the auxiliary needle loading mechanism 9 comprises a rotating and lifting unit 901 that integrates rotating and lifting functions, and a rectangular column 902 vertically arranged above the rotating and lifting unit 901 for driving the rectangular column 902 to move up and down and rotate, the top end of the rectangular column 902 is matched with the docking groove 713 at the bottom end of the rectangular counterweight column 710 to ensure that there is no relative slipping after the two are docked, and the rotating torque and axial thrust can be stably transmitted, the rectangular guide through hole is arranged on the position corresponding to the rectangular column 902 on the outer ring moving track 5, and the rectangular column 902 is inserted into the bearing through the rectangular guide through hole.

[0047] In operation, after the rectangular column 902 passes through the rectangular guide through hole and the bearing outer ring in sequence and is axially inserted into the moving cavity 708, the top end of the rectangular column 902 is inserted into the docking groove 713 at the bottom end of the rectangular counterweight column 710; when the rectangular column 902 continues to push upward, the rectangular column 902 drives the rectangular counterweight column 710 to move upward in the moving cavity 708 to the highest point, pushes the moving column 702 to move upward against the pre-pressing force of the pressurizing spring 703, and the lower end of the moving column 702 is aligned with the output end (i.e., the needle loading station) of the needle feeding unit 701; then the rotating and lifting unit 901 drives the rectangular column 902 to rotate, and further drives the rectangular counterweight column 710 and the moving column 702 to rotate synchronously, cooperates with the needle-by-needle pushing action of the needle feeding unit 701, and makes the needle roller accurately embedded in the arc-shaped groove 707 of the moving column 702 and simultaneously loaded in the window of the retainer, at this time, the retainer is fully loaded with needle rollers, thereby completing the installation of the needle rollers; after the needle loading is completed, the retainer fully loaded with the needle rollers falls into the bearing outer ring under the action of gravity, at this time, the rotating and lifting unit 901 drives the rectangular column 902 to move downward until it is separated from the moving cavity 708 and the bearing outer ring.

[0048] Working principle:

[0049] Needle loading station: station preparation, the outer ring moving mechanism 2 drives multiple bearing outer rings to be accurately conveyed to the needle loading station along the outer ring moving track 5; at the same time, the external mechanical arm (positioning error ≤0.5 mm) places the retainers one by one in the bearing outer rings at the needle loading station to ensure that the retainers are coaxial with the outer rings;

[0050] The second lifting mechanism 8 drives the needle loading and pressing mechanism 7 to move downward as a whole, at this time, the moving column 702 extends out of the open port of the pressing cylinder 706 under the joint action of its own gravity and the pressurizing spring 703, and during the moving downward process, the moving column 702 is first inserted into the inner hole of the retainer and abuts against the inner bottom surface of the bearing outer ring to realize preliminary positioning; the needle loading and pressing mechanism 7 continues to move downward until the lower port of the pressing cylinder 706 is docked and attached to the upper port of the bearing outer ring, thereby pressing the bearing outer ring through the pressing cylinder 706 to fix the position of the outer ring;

[0051] The rotating lifting unit two 901 drives the rectangular column 902 to ascend, the rectangular column 902 sequentially passes through the rectangular guide through hole on the outer ring moving track 5, the bearing outer ring, and finally axially penetrates into the moving cavity 708 in the moving column 702, the top end of the rectangular column 902 is accurately fitted with the butt joint groove 713 at the bottom end of the rectangular counterweight column 710; the rectangular column 902 continues to push the rectangular counterweight column 710 upwards until the counterweight column moves to the highest position in the moving cavity 708; during the process, the rectangular counterweight column 710 compresses the air in the moving cavity 708, so that the air pressure in the cavity increases; the air sequentially enters the containing groove 709 through the central air cavity 711 and the communication hole 712, pushes the clamping block 714 to radially stretch out, accurately embeds into the window of the retainer, and realizes stable grabbing of the retainer.

[0052] The rectangular column 902 continues to ascend, drives the moving column 702 to move upwards synchronously, compresses the compression spring 703, until the arc-shaped groove 707 at the lower end of the moving column 702 (matched with the needle roller) is aligned with the output end (i.e. the needle position to be installed) of the needle feeding unit 701, the vibratory bowl feeder continuously supplies needle rollers into the needle feeding unit 701; the electric air release valve 705 is opened in advance, the central air cavity 711 is depressurized, and space is reserved for the retraction of the clamping block 714; the needle feeding unit 701 pushes the needle rollers into the window of the retainer one by one, while the rotating lifting unit two 901 drives the rectangular column 902, the rectangular counterweight column 710 and the moving column 702 to rotate synchronously, so that the window of the retainer is aligned with the needle feeding unit in sequence through rotation, and the installation of all needle rollers is completed; during the pushing process, the outer wall of the needle roller extrudes the clamping block 714, and the clamping block 714 is pushed back into the containing groove 709 one by one, so that the grabbing of the retainer is released; after the installation of the needle is completed, the retainer loaded with needle rollers falls from the moving column 702 into the bearing outer ring under the action of its own gravity; then the second lifting mechanism 8 drives the needle installation and pressing mechanism 7 to ascend and reset, the rotating lifting unit two 901 drives the rectangular column 902 to move downwards and disengage from the moving cavity 708 and the bearing outer ring; the outer ring moving mechanism 2 is started again to transport the bearing outer ring loaded with needle rollers and retainers to the next process, i.e. the stamping and lubricating work station.

[0053] The stamping and lubricating work station: the first lifting mechanism 3 drives the stamping and lubricating mechanism 4 to move downwards, so that the bearing outer ring is embedded into the stamping flanging groove 410 at the lower end of the stamping column body 402; the stamping column body 402 applies a pre-pressing force to the bearing outer ring to fix the position of the outer ring; the rotating auxiliary column 602 rotates and ascends while being driven by the rotating lifting unit one 601, passes through the guide through hole on the outer ring moving track 5, and penetrates out of the needle rollers in the retainer, until the top end of the rotating auxiliary column 602 is embedded into the matching groove 412 in the stamping flanging groove 410; at this time, the rotating auxiliary column 602 plays a role in limiting the needle rollers in the radial direction, preventing the needle rollers from falling out of the window of the retainer during the lubricating and flanging process, and limiting the lubricating space, so that the lubricating oil enters the bearing outer ring better.

[0054] The external air pressure control system injects air into the grease injection accommodating cavity 409 through the air supply joint 404, thereby pushing the piston 408 to move downward, pushing the grease in the cavity to be injected into the bearing outer ring through the grease injection channel 413, and the filling amount of the grease is 30-50% of the free space inside the bearing. After the grease injection is completed, the first lifting mechanism 3 drives the stamping column body 402 to continue to move downward, the inner wall structure of the stamping flanging groove 410 is used for stamping flanging the upper port of the bearing outer ring, the grease injected in the flanging process is completely wrapped in the bearing, and after the flanging is completed, the flanged part of the bearing outer ring blocks the outlet of the grease injection channel 413. At this time, the external grease injection equipment supplements the grease into the grease injection accommodating cavity 409 through the grease injection joint 401, so that the piston 408 floats up, and preparation is made for the next grease injection;

[0055] Finally, the first lifting mechanism 3 drives the stamping column body 402 to ascend and reset; the rotating lifting unit one 601 drives the rotating auxiliary column 602 to rotate and move downward, and the rotating auxiliary column 602 is separated from the bearing. Because the outer wall of the rotating auxiliary column 602 rubs against the needle roller, the needle roller is slightly rotated, so that the grease is uniformly attached to the surface of the needle roller, the surface of the retainer and the inner wall of the bearing outer ring. Finally, the outer ring moving mechanism 2 transports the assembled bearing outer ring to the discharging station, and a single assembly cycle is completed. The above steps are repeated to realize continuous operation.

[0056] The above only describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement, change or addition to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A needle roller bearing assembly machine that combines needle loading and grease injection stamping and flanging, comprising a bearing mechanism (1) on which an outer ring moving track (5) is horizontally arranged, and an outer ring moving mechanism (2) is arranged on the outer ring moving track (5) for driving the outer ring of the bearing to move forward gradually along the track by a fixed displacement, characterized in that: A grease injection mechanism (4) is installed on a support mechanism (1). The support mechanism (1) is provided with a first lifting mechanism (3) for connecting to the upper part of the grease injection mechanism (4). A rotary lifting auxiliary mechanism (6) is provided on the outer ring moving track (5) located directly below the grease injection mechanism (4). The rotary lifting auxiliary mechanism (6) is engaged with the grease injection mechanism (4) to assist in quantitative grease injection into the bearing and stamping and flanging, as well as driving the needle roller to rotate in the outer ring of the bearing for auxiliary lubrication. A needle clamping mechanism (7) is provided on a support mechanism (1). The support mechanism (1) is provided with a second lifting mechanism (8) for connecting to the upper part of the needle clamping mechanism (7). An auxiliary needle clamping mechanism (9) is provided on the outer ring moving track (5) located directly below the needle clamping mechanism (7). The needle clamping mechanism (7) and the auxiliary needle clamping mechanism (9) are connected and used to trigger the needle clamping mechanism (7) to grip the retainer and for the auxiliary needle clamping mechanism (7) to clamp needles on the retainer. The stamping grease injection mechanism (4) includes a stamping column (402), a stamping flange groove (410) matching the outer ring contour of the bearing is opened at the center of the lower end of the stamping column (402), an axial channel (411) is opened through the interior of the stamping column (402), and a ring-shaped grease injection cavity (409) is opened coaxially inside the stamping column (402). A piston (408) that fits precisely with the cavity wall is provided in the grease injection cavity (409). The lower end of the grease injection cavity (409) is connected to the stamping flange groove (410) through the grease supply channel (413), and the upper end is connected to the outside through the air passage (403). An air supply connector (404) is provided at the outlet position of the air passage (403). A grease injection connector (401) communicating with the grease injection cavity (409) is provided on the side wall of the stamping column (402). The rotary lifting auxiliary mechanism (6) includes a rotary lifting unit (601) and a rotary auxiliary column (602). The rotary auxiliary column (602) is vertically arranged on the upper part of the rotary lifting unit (601) to drive the rotary auxiliary column (602) to move up and down and rotate. The top of the rotary auxiliary column (602) is a hemispherical structure. The outer ring moving track (5) and the rotary auxiliary column (602) are provided with through guide holes at corresponding positions. After passing through the guide holes, the rotary auxiliary column (602) is precisely embedded in the matching groove (412) opened on the bottom surface of the stamping flange groove (410).

2. The needle roller bearing assembly machine as described in claim 1, characterized in that: The supporting mechanism (1) includes vertically distributed vertical plates (101), with a window (102) in the middle of the vertical plate (101). An outer ring moving track (5) is installed on the bottom surface of the window (102), and the outer ring moving track (5) is connected to the vertical plate (101) by a reinforcing rib (103).

3. The needle roller bearing assembly machine as described in claim 1, which combines needle loading and grease injection stamping and flanging, is characterized in that: The outer ring moving mechanism (2) includes two outer ring moving plates (202) symmetrically arranged on the outer ring moving track (5) and slidably arranged along the axial direction of the outer ring moving track (5), and two outer ring clamping plates (205) correspondingly installed on the inner side of the outer ring moving plates (202) and placed on the outer ring moving track (5). Each outer ring moving plate (202) is fixedly installed with a clamping drive unit (203). The output end of the clamping drive unit (203) is connected to the outer ring clamping plate (205) respectively, and is used to drive the outer ring clamping plate (205) to open and close along the radial direction of the outer ring moving track (5). Multiple clamping notches (204) are equidistantly opened on the opposite surface of the two outer ring clamping plates (205) along the axial direction of the outer ring moving track (5). A reciprocating drive unit (201) is provided on the outer ring moving track (5), and the reciprocating drive unit (201) is connected to the outer ring moving plate (202).

4. The needle roller bearing assembly machine as described in claim 3, which combines needle loading and grease injection stamping and flanging, is characterized in that: The clamping notch (204) adopts a V-shaped structure, an isosceles trapezoidal structure, or an arc-shaped structure that fits the outer ring of the bearing.

5. The needle roller bearing assembly machine as described in claim 1, characterized in that: The top of the stamped column (402) is connected to one end of the T-shaped guide column (406), and the other end of the T-shaped guide column (406) is slidably connected to the connecting seat (405). A force sensor (407) is installed on the lower surface of the connecting seat (405).

6. The needle roller bearing assembly machine as described in claim 1, characterized in that: The needle clamping mechanism (7) includes a vertically arranged pressure cylinder (706), a moving column (702) coaxially arranged inside the pressure cylinder (706), and two needle feeding units (701) symmetrically arranged on the sides of the pressure cylinder (706). The upper end of the pressure cylinder (706) is a closed end plate, and the lower end is an open port. A limiting cylinder (704) is coaxially arranged on the upper end of the moving column (702). The limiting cylinder (704) passes axially through the closed end plate at the upper end of the pressure cylinder (706). The two ends of the limiting cylinder (704) are constructed with annular flanges with a diameter larger than the cylinder body. A pressure spring (703) is sleeved on the outside of the limiting cylinder (704). The pressure spring (703) is located inside the pressure cylinder (706), and the upper end of the pressure spring (703) abuts against the closed end of the pressure cylinder (706). The inner side and lower end of the plate abut against the top surface of the movable column (702). Multiple arc-shaped grooves (707) are equidistantly provided on the outer peripheral surface of the lower end of the movable column (702) along the axial direction. A receiving groove (709) is provided on the bottom surface of each arc-shaped groove (707). A clamping block (714) is adapted to be installed in the receiving groove (709). A movable cavity (708) is provided in the movable column (702) along the axial direction. A rectangular counterweight column (710) is adapted to be installed in the movable cavity (708). The upper part of the movable cavity (708) is connected to the central air cavity (711). The central air cavity (711) is connected to the receiving groove (709) through the connecting hole (712). An electric venting valve (705) for venting air into and out of the central air cavity (711) is installed on the movable column (702).

7. A needle roller bearing assembly machine as described in claim 6, characterized in that: The auxiliary needle loading mechanism (9) includes a rotary lifting unit (901) and a rectangular column (902). The rectangular column (902) is vertically positioned above the rotary lifting unit (901). The outer ring moving track (5) has a rectangular guide hole at the position corresponding to the rectangular column (902). The top of the rectangular column (902) passes through the rectangular guide hole and engages with the docking groove (713) at the bottom of the rectangular counterweight column (710) inside the bearing outer ring.

Images