A bearing outer cylindrical grinding device

Abstract

The present invention relates to the technical field of grinding equipment, and specifically discloses a bearing outer cylindrical grinding device, wherein a rotating seat is coaxially rotatably connected to a support rod frame, and a grinding mechanism is installed on the rotating seat; a ring seat is slidably sleeved on the support rod frame along the front-back direction, a central push piece is located directly below the bearing and is vertically slidably connected to the frame, and a first connecting rod is hinged between the central push piece and the ring seat; two sets are rotatably sleeved on the ring seat, and two side push pieces are respectively hinged to the two sets through a second connecting rod, the second connecting rod is equal in length to the first connecting rod, and the side push piece is connected to a sliding seat through an elastic sleeve rod, and the sliding seat is elastically slidably connected to the frame along the left-right direction. The bearing outer cylindrical grinding device of the present invention determines the concentricity of the support rod frame and the bearing outer cylindrical surface through the contact positioning of the central push piece and the side push piece on the bearing outer cylindrical surface, thereby realizing the correction grinding of the grinding mechanism and making the inner and outer circles of the bearing concentric.

Description

Technical Field

[0001] The invention relates to the technical field of grinding equipment, and in particular to a bearing bush outer cylindrical grinding device. Background Art

[0002] The bearing is the part where the sliding bearing and the journal contact. It is a semi-cylindrical part in the shape of a tile and is very smooth. It is used to reduce the friction and wear between the shaft and the bearing and extend the service life of the shaft and the bearing. During the manufacturing or overhaul process of the bearing, the inner and outer circles may not be concentric due to machining errors. The non-concentric bearing will reduce the contact area between the journal and the bearing, thereby increasing the friction and wear. The non-concentric inner and outer circles of the bearing may also aggravate the vibration and noise of the equipment, affecting the stability and service life of the equipment.

[0003] The Chinese patent application with application publication number CN116141142A discloses an adaptive motor bearing precision grinding device, including a processing frame, on which is provided a bidirectional clamping mechanism for clamping the motor bearing and a grinding mechanism for grinding the motor bearing, the grinding mechanism including a grinding gear and a motor fixing frame, the grinding gear being rotatably mounted on the processing frame and driven to rotate by a rack reciprocating mechanism, the grinding gear being connected to the motor fixing frame via a lifting electric cylinder, a moving electric cylinder and a motor fixing frame, a grinding motor being mounted on the motor fixing frame, and a grinding wheel being provided at the output end of the grinding motor. When in use, the bidirectional clamping mechanism can be used to clamp the motor bearing first; then the lifting electric cylinder and the moving electric cylinder can be used to adjust the position of the grinding wheel so that the outer edge of the grinding wheel contacts the motor bearing; then the rack reciprocating mechanism can drive the grinding gear to make a 180° reciprocating rotation, and at the same time the grinding motor drives the grinding wheel to rotate, so that the grinding wheel can reciprocate and grind the motor bearing during revolution, and then the moving electric cylinder can control the grinding wheel to slowly feed forward to achieve comprehensive grinding of the motor bearing.

[0004] However, when a bearing with non-concentric inner and outer circles is selected, the above-mentioned device grinds the bearing in a uniform covering manner, which will uniformly reduce the wall thickness of the bearing, thereby failing to change the concentricity difference of the bearing.

[0005] Therefore, the art needs a bearing outer cylindrical grinding device to solve the above problems. Summary of the invention

[0006] The invention provides a bearing bush outer cylindrical grinding device, aiming to solve the problem in the related art that the bearing bush concentricity difference cannot be changed during covering grinding.

[0007] The bearing outer cylindrical grinding device of the present invention comprises a frame, a clamping device, a support rod frame and a positioning assembly, wherein the clamping device is arranged on the frame and is used to clamp the bearing with the bearing opening facing upward, the support rod frame is located directly above the bearing and can slide up and down, the support rod frame is coaxially connected with a rotating seat, the rotating seat is equipped with a grinding mechanism, and the grinding mechanism is used to grind the bearing when the support rod frame and the outer cylindrical surface of the bearing are concentric; the positioning assembly comprises a ring seat, a center push piece, a sleeve and a side push piece, and the ring seat is slidably sleeved along the front and rear directions On the supporting rod frame, the central push piece is located directly below the bearing shell and is vertically slidably connected to the frame, and a first connecting rod is hinged between the central push piece and the ring seat; the two sets of components are rotatably sleeved on the ring seat, and the two side push pieces are opposite to each other on the left and right sides of the central push piece, and are respectively hinged to the two sets of components through a second connecting rod, and the second connecting rod is of the same length as the first connecting rod, and a sliding seat is connected to the frame through a vertical elastic sleeve rod below the side push piece, and the sliding seat is elastically slidably connected to the frame along the left and right directions.

[0008] The effect is that when the support rod frame moves upward, the side push pieces maintain contact with the outer cylindrical surface of the bearing shell through the action of elastic force. When the center push piece also contacts the outer cylindrical surface of the bearing shell, the center push piece and the two side push pieces realize three-point positioning of the outer cylindrical surface of the bearing shell. The connecting line between the three forms an arc line, which is concentric and has the same diameter as the outer cylindrical surface of the bearing shell. Since the first connecting rod and the second connecting rod are of equal length, it can be determined that the support rod frame is concentric with the outer cylindrical surface of the bearing shell at the current position. At this point, the outer cylindrical surface of the bearing shell is used as a reference for subsequent grinding. Then the rotating seat drives the grinding mechanism to rotate. The rotation direction of the grinding mechanism is the circumference of the support rod frame, that is, the circumference of the outer cylindrical surface of the bearing shell, so as to realize the grinding of the inner cylindrical surface of the bearing shell, so that the center of the inner cylindrical surface of the bearing shell is concentric with the center of the outer cylindrical surface, thereby improving the concentricity of the bearing shell.

[0009] Preferably, the side pushing member includes a fixed ring and a rotating column, the fixed ring is connected to the elastic sleeve rod, the rotating column and the fixed ring are rotatably connected, and the rotating column is hinged to the second connecting rod.

[0010] The effect is that when the two side push members are unfolded to both sides, the second connecting rod will undergo circumferential deflection, one end of the second connecting rod deflects with the kit, and the other end deflects with the rotating column. The kit and the rotating column realize compensatory movement of the second connecting rod, ensuring smooth and reliable movement.

[0011] Preferably, the elastic sleeve rod includes a push rod and an elastic member, the top end of the push rod is fixedly connected to the fixing ring, and the bottom end is slidably inserted into the sliding seat, and the elastic member connects the push rod and the sliding seat; a non-return structure is provided between the push rod and the sliding seat so that the push rod cannot move back downward after being pushed upward.

[0012] Preferably, the non-return structure includes a ratchet bar and a ratchet tooth, the ratchet bar is elastically slidably embedded in the top rod along the horizontal direction, the ratchet tooth is fixed on the sliding seat and engages with the ratchet bar, and the ratchet tooth is used to allow the ratchet bar to pass when moving upward and to block it when moving downward.

[0013] Preferably, a telescopic device is provided on the slide seat, a telescopic end of the telescopic device penetrates into the inner side of the slide seat and is provided with a push piece, and the push piece can push back the ratchet bar to separate the ratchet bar and the ratchet teeth.

[0014] The effect is that under normal conditions, the telescopic device can remain in an extended state, so that the push piece pushes back the ratchet, and the ratchet and ratchet teeth remain separated, thus preventing the non-return mechanism from affecting the movement of the push rod and the side push piece. When the central push piece is about to contact the outer cylindrical surface of the bearing shell, the telescopic device can control the push piece to retract, and the ratchet strip is reset and re-engaged with the ratchet teeth under the action of the reset spring. Subsequently, the central push piece contacts the outer cylindrical surface of the bearing shell upward. If the support rod frame continues to move upward, the side push piece will press downward. At this time, the ratchet teeth prevent the push rod and the side push piece from moving downward by non-returning the ratchet strip. As a result, the support rod frame cannot move upward and is locked in the current position, thereby maintaining a concentric state with the outer cylindrical surface of the bearing shell. This avoids relying on human eyes to judge the position of the support rod frame, greatly reducing manual errors, and thus improving the accuracy of grinding.

[0015] Preferably, the rotating column and the central pushing member are hinged via a stabilizing support rod.

[0016] The effect is that the stabilizing support rod can link the two side push members and the central push member to ensure the stability of the three structures, and can also promote the synchronous movement of the two side push members.

[0017] Preferably, the grinding mechanism comprises a distance adjusting member and a grinding head, wherein the distance adjusting member is mounted on the rotating seat and connected to the grinding head, and the distance adjusting member is used to adjust the radial position of the grinding head on the supporting rod frame.

[0018] The effect is that the grinding head can change its position in the radial direction of the support rod frame through the distance adjusting member, thereby maintaining a constant contact state with the inner cylindrical surface of the bearing bush and ensuring the grinding effect.

[0019] Preferably, the clamping device includes two clamping units arranged along the left and right directions, the clamping unit includes a telescopic cylinder and a clamping piece, the telescopic cylinder is installed on the frame, and the side of the bearing shell can be overlapped on the telescopic output rod of the telescopic cylinder; the two clamping pieces are spaced apart along the telescopic direction of the telescopic cylinder, and one is fixed on the frame, and the other is fixed on the rod end of the telescopic output rod of the telescopic cylinder. When the telescopic output rod is retracted, the two clamping pieces can be brought close to each other to clamp the bearing shell in the middle.

[0020] Preferably, a support is provided on the frame, and the support is provided with a lift for controlling the support rod frame to slide up and down.

[0021] Preferably, the support can slide forward and backward, and the frame is provided with a linear drive for controlling the support to slide forward and backward.

[0022] The effect is that when the grinding head completes the correction of one circle of the inner cylindrical surface of the bearing, the linear drive can control the grinding head to feed in the forward and backward directions, so that the grinding head can grind the next circle of the inner cylindrical surface until the entire area of ​​the inner cylindrical surface of the bearing is ground.

[0023] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0024] When the support rod frame moves upward, the side push pieces maintain contact with the outer cylindrical surface of the bearing shell through the action of elastic force, and expand to both sides at the same time. When the center push piece also contacts the outer cylindrical surface of the bearing shell, the center push piece and the two side push pieces realize three-point positioning of the outer cylindrical surface of the bearing shell, and the connecting line between the three forms an arc line that is concentric and has the same diameter as the outer cylindrical surface of the bearing shell. Since the first connecting rod and the second connecting rod are of equal length, it can be determined that the support rod frame is concentric with the outer cylindrical surface of the bearing shell. Therefore, with the outer cylindrical surface of the bearing shell as a reference datum, the rotating seat then drives the grinding mechanism to rotate, and the rotation direction of the grinding mechanism is consistent with the circumference of the outer cylindrical surface of the bearing shell, so as to realize the correction grinding of the inner cylindrical surface of the bearing shell, so that the center of the inner cylindrical surface of the bearing shell is concentric with the center of the outer cylindrical surface, thereby improving the concentricity of the bearing shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the outer cylindrical grinding device of the bearing bush and the outer shape of the bearing bush of the present invention.

[0026] Figure 2 It is a front view schematic diagram when the center push piece of the present invention does not contact the outer cylindrical surface of the bearing shell.

[0027] Figure 3 It is a front view schematic diagram of the central push piece of the present invention when it contacts the outer cylindrical surface of the bearing bush.

[0028] Figure 4It is a three-dimensional schematic diagram of the bearing outer cylindrical grinding device of the present invention.

[0029] Figure 5 It is a cross-sectional schematic diagram of the support rod frame part of the present invention.

[0030] Figure 6 It is a cross-sectional schematic diagram of the elastic sleeve rod to the sliding seat portion of the present invention.

[0031] Figure 7 The present invention Figure 6 A magnified schematic diagram of center A.

[0032] Reference numerals:

[0033] 100. Bearing;

[0034] 1. Frame; 11. Side bracket; 12. Support; 121. Lifter; 13. Linear drive; 14. Horizontal frame; 141. Fixed seat; 142. Sliding seat; 143. Push spring;

[0035] 2. Support rod frame; 21. Rotating seat; 211. Rod body; 212. Plate body; 22. Grinding motor;

[0036] 3. Grinding mechanism; 31. Distance adjusting member; 32. Grinding head;

[0037] 4. Clamping unit; 41. Telescopic cylinder; 411. Telescopic output rod; 42. Clamping member;

[0038] 51. Ring seat; 52. Center push piece; 521. First connecting rod; 522. Guide rod; 53. Kit; 54. Side push piece; 541. Second connecting rod; 542. Fixed ring; 543. Rotating column; 55. Elastic sleeve rod; 551. Push rod; 552. Compression spring; 56. Stabilizing support rod;

[0039] 61. ratchet; 611. return spring; 62. ratchet; 63. telescopic device; 631. push piece. DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0041] Combine the following Figures 1 to 7 The bearing outer cylindrical grinding device of the present invention is described.

[0042] like Figures 1 to 5 As shown, the bearing outer cylindrical grinding device of the present invention includes a frame 1, a clamping device, a support rod frame 2, a grinding mechanism 3, and a positioning assembly.

[0043] The frame 1 can be fixed on the ground, and two symmetrical side brackets 11 are formed thereon, and the bearing bush 100 with the bush opening facing upward is placed between the two side brackets 11.

[0044] The clamping device includes two clamping units 4 arranged opposite to each other, and the two clamping units 4 are respectively arranged on two side brackets 11. The clamping unit 4 includes a telescopic cylinder 41 and a clamping member 42. The telescopic cylinder 41 is installed on the side bracket 11. The telescopic output rod 411 of the telescopic cylinder 41 can be telescoped forward and backward. When placed, the side of the bearing 100 can be overlapped on the telescopic output rod 411 of the telescopic cylinder 41; the two clamping members 42 are spaced apart in the front-to-back direction, and one is fixed on the frame 1, and the other is fixed on the rod end of the telescopic output rod 411 of the telescopic cylinder 41. When the telescopic output rod 411 is retracted, the two clamping members 42 can be brought close to each other, and the two clamping members 42 clamp the middle bearing 100, thereby fixing the bearing 100.

[0045] The frame 1 is provided with a support 12 that can slide forward and backward and a linear drive 13 for controlling the sliding of the support 12. The support rod frame 2 is located directly above the bearing 100 and is connected to the support 12 through an elevator 121. The elevator 121 is used to control the up and down sliding of the support rod frame 2. A rotating seat 21 is coaxially connected to the support rod frame 2. The rotating seat 21 includes a rod body 211 that is rotatably arranged inside the support rod frame 2 and a disc body 212 that protrudes from the rear side of the support rod frame 2 and is coaxially connected to the rod body 211. The front end of the support rod frame 2 is provided with a grinding motor 22 for driving the rod body 211 to rotate.

[0046] The grinding mechanism 3 includes a distance adjusting member 31 and a grinding head 32. The distance adjusting member 31 is mounted on the disc body 212. The grinding head 32 is connected to the output end of the distance adjusting member 31. The distance adjusting member 31 is used to adjust the radial position of the grinding head 32 in the support rod frame 2. In this embodiment, the distance adjusting member 31 can be a hydraulic rod, a cylinder, or an electric telescopic rod. In some embodiments, the grinding head 32 can also be replaced by a grinding tool to achieve effective grinding of the inner or outer cylindrical surface of the bearing shell 100.

[0047] Continue to refer Figures 1 to 4 The positioning assembly includes a ring seat 51, a central push piece 52, a sleeve 53 and a side push piece 54. The ring seat 51 is slidably sleeved on the support rod frame 2 along the front-back direction, the central push piece 52 is located directly below the bearing bush 100 and a first connecting rod 521 is hinged between the ring seat 51, and a cross frame 14 located below the central push piece 52 is fixedly connected between the two side brackets 11, and a fixed seat 141 is fixedly provided on the cross frame 14, and a guide rod 522 is connected to the lower part of the central push piece 52, and the guide rod 522 is vertically slidably penetrated on the fixed seat 141.

[0048] The two sets 53 are both rotatably sleeved on the ring seat 51, and the two side push pieces 54 are opposite to the left and right sides of the central push piece 52. The two side push pieces 54 are respectively hinged with the two sets 53 through the second connecting rod 541, and the second connecting rod 541 is of the same length as the first connecting rod 521. A slide seat 142 is slidably mounted on the horizontal frame 14, and the slide seat 142 is connected to the side bracket 11 through a push spring 143. A vertical elastic sleeve rod 55 is arranged between the side push piece 54 and the slide seat 142. The elastic sleeve rod 55 includes a push rod 551 and an elastic member. The top end of the push rod 551 is connected to the side push piece 54, and the bottom end slides downward and penetrates the slide seat 142. The elastic member can directly adopt a compression spring 552 sleeved on the outer peripheral side of the push rod 551, and the two ends of the compression spring 552 are respectively connected to the push rod 551 and the slide seat 142.

[0049] In the initial state, the bearing 100 can be placed between the two side brackets 11. When the bearing 100 moves downward, it will squeeze the V-shaped bracket formed by the two side push pieces 54 and the center push piece 52, forcing the two side push pieces 54 to expand to the left and right sides. At this time, the slide 142 slides and squeezes the push spring 143. The push spring 143 gives the side push piece 54 an inward thrust through the slide 142, and the side push piece 54 is also squeezed and moved downward. The compression spring 552 is compressed and gives the side push piece 54 an upward thrust. Under the combined action of the inward and upward thrusts, the side push piece 54 will be closely pushed against the outer circumferential surface of the bearing 100. After the bearing 100 is placed, the clamping device can clamp the bearing 100 to achieve its fixation.

[0050] Then the lifter 121 can control the support rod frame 2 to move upward, and the support rod frame 2 drives the center push piece 52 to move upward through the slide seat 142 and the first connecting rod 521 until the center push piece 52 abuts against the outer cylindrical surface of the bearing shell 100. At the same time, during the upward movement of the center push piece 52, the side push piece 54 is blocked by the outer cylindrical surface of the bearing shell 100 and cannot continue to move upward. In order to compensate the distance of the side push piece 54, the ring seat 51 gradually moves backward. During the backward movement, the second connecting rod 541 pushes the side push piece 54 to both sides. Due to the elastic thrust inward and upward, the side push piece 54 maintains a contact state with the outer cylindrical surface of the bearing shell 100.

[0051] At this time, the central push piece 52 and the two side push pieces 54 are in contact with the outer cylindrical surface of the bearing shell 100, and the connecting line between the three forms an arc, which is concentric and has the same diameter as the outer cylindrical surface of the bearing shell 100; in addition, at this time, the straight-line distance from the ring seat 51 to the grinding mechanism 3 is a constant, and the first connecting rod 521 and the second connecting rod 541 are of equal length, so that at this time, the vertical distance from the central push piece 52 to the axis of the supporting rod frame 2 and the vertical distance from the side push piece 54 to the axis of the supporting rod frame 2 are equal. In other words, at this time, the central push piece 52, the first connecting rod 521, and the supporting rod frame 2 together form a right-angled triangle structure, or a side push piece Part 54, the second connecting rod 541, and the supporting rod frame 2 together form a right triangle structure. By determining the lengths of the two sides of the right triangle, the length of the third side can be determined. At this time, the lengths of the third side formed by the central pushing member 52 and the two side pushing members 54 are equal, so it can be determined that the length is the radius of the above-mentioned arc. Since the arc has the same diameter as the outer cylindrical surface of the bearing shell 100, the above-mentioned length is also the radius of the outer cylindrical surface of the bearing shell 100, that is, the vertical distance from the central pushing member 52 to the axis of the supporting rod frame 2 is the radius of the outer cylindrical surface of the bearing shell 100, thereby determining that the supporting rod frame 2 is concentric with the outer cylindrical surface of the bearing shell 100 at the current position.

[0052] At this point, the outer cylindrical surface of the bearing 100 is used as a reference for subsequent grinding. Subsequently, the grinding motor 22 can control the rotation of the rotating seat 21, and the rotating seat 21 drives the grinding head 32 to rotate. The rotation direction of the grinding head 32 is the circumference of the support rod frame 2, that is, the circumference of the outer cylindrical surface of the bearing 100. During the rotation, the grinding head 32 grinds the inner cylindrical surface of the bearing 100, so that the center of the inner cylindrical surface of the bearing 100 is concentric with the center of the outer cylindrical surface, and the center of the inner cylindrical surface is corrected by circumferential grinding to improve the concentricity of the bearing 100. The grinding head 32 can change its position in the radial direction of the support rod frame 2 through the distance adjusting member 31, so as to maintain a constant contact state with the inner cylindrical surface of the bearing 100. When the grinding head 32 completes the correction of one circle of the inner surface of the bearing 100, the linear drive 13 can control the grinding head 32 to make a feed movement in the front-rear direction, so that the grinding head 32 can grind the next circle of the inner surface until the entire area of ​​the inner surface of the bearing 100 is ground.

[0053] The side push member 54 includes a fixed ring 542 and a rotating column 543. The fixed ring 542 is fixedly connected to the top of the push rod 551 to play a supporting role. The rotating column 543 is rotatably connected to the fixed ring 542, and the rotating column 543 is hinged to the second connecting rod 541. This is so that when the two side push members 54 are unfolded to both sides, the second connecting rod 541 will undergo annular deflection. One end of the second connecting rod 541 deflects with the set 53, and the other end deflects with the rotating column 543. The set 53 and the rotating column 543 realize the compensatory movement of the second connecting rod 541, ensuring smooth and reliable movement. It should be noted that in practice, the first connecting rod 521 only makes a planar movement in the front-back direction, and does not undergo annular deflection, so that the central push member 52 can be a fixed structure, and of course, it can also be the same as the structure of the side push member 54.

[0054] Continue to refer Figures 1 to 3 The rotating column 543 and the central push member 52 are hingedly connected by a stabilizing rod 56. The stabilizing rod 56 can link the two side push members 54 and the central push member 52 to ensure the stability of the three structures, and can also promote the synchronous movement of the two side push members 54.

[0055] After the central push piece 52 and the two side push pieces 54 contact the outer circumference of the bearing shell 100, if the lifter 121 controls the support rod frame 2 to continue to move upward, since the central push piece 52 and the two side push pieces 54 are blocked by the outer circumference of the bearing shell 100 and cannot move upward, in order to achieve distance compensation, the ring seat 51 will continue to move backward, and squeeze the side push pieces 54 to both sides through the second connecting rod 541. At this time, since the upward freedom of the central push piece 52 is zero, the second connecting rod 541 is equivalent to separating the side push pieces 54 outward, and the side push pieces 54 are pressed outward and downward, thereby breaking away from the contact with the outer circumference of the bearing shell 100. In this way, the upward movement of the support rod frame 2 is not restricted and may cross the axis of the bearing shell 100. However, if the support rod frame 2 is judged to be concentric only by observing the contact state of the central push piece 52 and the side push piece 54 with human eyes, it is easy to produce errors, resulting in inaccurate results and affecting the accuracy of grinding.

[0056] To this end, continue to refer to Figure 1 , Figure 3 , Figure 6 and Figure 7 A non-return structure is provided between the top rod 551 and the slide 142, and the non-return structure includes a ratchet 61 and a ratchet tooth 62. The length direction of the ratchet 61 is consistent with the vertical direction. The ratchet 61 is slidably embedded in the top rod 551 along the front-back direction, and a reset spring 611 is connected between the ratchet 61 and the top rod 551; the ratchet teeth 62 are fixed to the inner wall of the slide 142, and the number of the ratchet teeth 62 can be multiple and evenly spaced along the vertical direction. The ratchet teeth 62 are engaged with the ratchet 61, and the ratchet teeth 62 are used to allow the ratchet 61 to pass when it moves up and to block it when it moves down.

[0057] A telescopic device 63 is installed on the slide 142 . The telescopic end of the telescopic device 63 penetrates into the inner side of the slide 142 and is provided with a push piece 631 . The push piece 631 can push back the ratchet bar 61 to separate the ratchet bar 61 from the ratchet teeth 62 .

[0058] Under normal conditions, the telescopic device 63 can remain in the extended state, so that the push piece 631 pushes back the ratchet 61, and the ratchet 61 and the ratchet 62 remain separated, so as to prevent the non-return mechanism from affecting the movement of the push rod 551 and the side push piece 54. When the central push piece 52 is about to contact the outer cylindrical surface of the bearing shell 100, the telescopic device 63 can control the push piece 631 to retract, and the ratchet 61 is reset and re-engaged with the ratchet 62 under the action of the reset spring 611. Then the central push piece 52 contacts the outer cylindrical surface of the bearing shell 100 upwards. If the support rod frame 2 continues to move upward, as mentioned above, the side push piece 54 will press downward. At this time, the ratchet 62 blocks the downward movement of the push rod 551 and the side push piece 54 by non-returning the ratchet 61. Therefore, the support rod frame 2 cannot move up and is locked in the current position, thereby maintaining a concentric state with the outer cylindrical surface of the bearing shell 100. This avoids relying on human eyes to judge the position of the support rod frame 2, greatly reduces manual errors, and thus improves the accuracy of grinding.

[0059] It should be noted that the present invention can be appropriately transformed, such as rotating some parts 180 degrees, to achieve correction grinding of the outer cylindrical surface of the bearing 100 based on the inner cylindrical surface of the bearing 100, and also to achieve the effect of concentricity of the inner and outer circles. This is an equivalent simple transformation and will not be elaborated here.

[0060] refer to Figures 1 to 7 The working steps of the bearing outer cylindrical grinding device of the present invention are as follows:

[0061] In the first step, the bearing 100 is placed, with the bearing opening facing upwards, and placed between the two side brackets 11 from top to bottom. During the downward movement of the bearing 100, the two side push pieces 54 will be squeezed, so that the two side push pieces 54 will be expanded to the left and right sides. Under the action of the elastic force, the side push pieces 54 will be close to the outer circumferential surface of the bearing 100. Then the clamping unit 4 controls the telescopic output rod 411 to retract, and the two clamping pieces 42 approach each other to clamp the middle bearing 100, thereby fixing the bearing 100.

[0062] In the second step, the bearing shell 100 is positioned, and the lifting machine 121 controls the support rod frame 2 to move upward. The support rod frame 2 drives the center push piece 52 to move upward through the slide seat 142 and the first connecting rod 521 until the center push piece 52 abuts against the outer cylindrical surface of the bearing shell 100. At the same time, during the upward movement of the center push piece 52, the side push piece 54 is blocked by the outer cylindrical surface of the bearing shell 100 and cannot continue to move upward. In order to compensate the distance of the side push piece 54, the ring seat 51 gradually moves backward. During the backward movement, the second connecting rod 541 pushes the side push piece 54 to both sides. Due to the elastic thrust inward and upward, the side push piece 54 maintains a contact state with the outer cylindrical surface of the bearing shell 100. When the central push piece 52 and the two side push pieces 54 are in contact with the outer cylindrical surface of the bearing shell 100, the three realize the positioning of the outer cylindrical surface of the bearing shell 100, thereby determining that the support rod frame 2 is concentric with the outer cylindrical surface of the bearing shell 100 at the current position. At the same time, the ratchet 62 has a non-return function for the ratchet bar 61, thereby blocking the downward movement of the push rod 551 and the side push pieces 54, thereby, the support rod frame 2 cannot move up and is locked in the current position, thereby maintaining the concentric state with the outer cylindrical surface of the bearing shell 100, thus avoiding relying on human eyes to judge the position of the support rod frame 2, greatly reducing manual errors, and thus improving the accuracy of subsequent grinding.

[0063] The third step is grinding the bearing 100. The grinding motor 22 controls the rotating seat 21 to rotate, and the rotating seat 21 drives the grinding head 32 to rotate. The rotation direction of the grinding head 32 is the circumferential direction of the outer cylindrical surface of the bearing 100. During the rotation, the grinding head 32 grinds the inner cylindrical surface of the bearing 100, so that the center of the inner cylindrical surface of the bearing 100 is concentric with the center of the outer cylindrical surface. The center of the inner cylindrical surface is corrected by circumferential grinding to improve the concentricity of the bearing 100. The grinding head 32 can change its position in the radial direction of the support rod frame 2 through the distance adjusting member 31, so as to maintain a constant contact state with the inner cylindrical surface of the bearing 100. When the grinding head 32 completes the correction of one circle of the inner cylindrical surface of the bearing 100, the linear drive 13 can control the grinding head 32 to feed in the front-to-back direction, so that the grinding head 32 can grind the next circle of the inner cylindrical surface until the entire area of ​​the inner cylindrical surface of the bearing 100 is ground.

[0064] In other embodiments, reference Figures 1 to 7The clamping device can also be an existing scissor-type clamping mechanism, a counter-movable clamping mechanism, etc. The linear drive 13, the elevator 121, and the telescopic device 63 can all be hydraulic rods, cylinders, electric push rods, etc. The reset spring 611 in the non-return mechanism can connect the ratchet 62 and the slide 142, so that the ratchet 62 can slide elastically, and the ratchet bar 61 is fixed to the top rod 551, which can also achieve the non-return function; or, the teeth on the ratchet bar 61 are replaced by a plurality of spaced-apart wedge blocks, and the ratchet 62 is replaced by a right-angle block, which avoids blocking the upward movement of the wedge block by contacting the inclined surface of the wedge block, and limits the downward movement of the wedge block by contacting the straight surface of the wedge block.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A bearing outer cylindrical grinding device, comprising a frame and a clamping device, wherein the clamping device is arranged on the frame and is used to clamp the bearing with the bearing opening facing upward, characterized in that: It also includes a support rod frame and a positioning assembly, the support rod frame is located directly above the bearing bush and can slide up and down, a rotating seat is coaxially connected to the support rod frame, a grinding mechanism is installed on the rotating seat, and the grinding mechanism is used to grind the bearing bush when the support rod frame and the outer cylindrical surface of the bearing bush are concentric; The positioning assembly includes a ring seat, a central push piece, a set and a side push piece. The ring seat is slidably sleeved on the support rod frame in the front-back direction. The central push piece is located directly below the bearing bush and is vertically slidably connected to the frame. A first connecting rod is hinged between the central push piece and the ring seat. Both sets are rotatably sleeved on the ring seat. Two side push pieces are oppositely arranged on the left and right sides of the central push piece and are respectively hinged to the two sets through a second connecting rod. The second connecting rod is equal in length to the first connecting rod. A sliding seat is connected to the lower side of the side push piece through a vertical elastic sleeve rod. The sliding seat is elastically slidably connected to the frame in the left-right direction. The side push member comprises a fixed ring and a rotating column, the fixed ring is connected to the elastic sleeve rod, the rotating column is rotatably connected to the fixed ring, and the rotating column is hinged to the second connecting rod; The elastic sleeve rod comprises a push rod and an elastic member, the top end of the push rod is fixedly connected to the fixing ring, the bottom end is slidably arranged on the sliding seat, and the elastic member connects the push rod and the sliding seat; a non-return structure is provided between the push rod and the sliding seat, so that the push rod cannot move back downward after being pushed upward; The rotating column and the central pushing member are hinged via a stabilizing support rod; The grinding mechanism comprises a distance adjusting member and a grinding head. The distance adjusting member is installed on the rotating seat and connected to the grinding head. The distance adjusting member is used to adjust the radial position of the grinding head on the supporting rod frame.

2. The bearing outer cylindrical grinding device according to claim 1, characterized in that: The non-return structure includes a ratchet bar and a ratchet tooth. The ratchet bar is elastically slidably embedded in the top rod along the horizontal direction. The ratchet tooth is fixed on the sliding seat and engages with the ratchet bar. The ratchet tooth is used to allow the ratchet bar to pass when it moves upward and to block it when it moves downward.

3. The bearing outer cylindrical grinding device according to claim 2, characterized in that: The slide seat is provided with a telescopic device, the telescopic end of the telescopic device penetrates into the inner side of the slide seat and is provided with a push piece, and the push piece can push back the ratchet bar to separate the ratchet bar and the ratchet teeth.

4. The bearing outer cylindrical grinding device according to claim 1, characterized in that: The clamping device includes two clamping units arranged along the left and right directions, and the clamping unit includes a telescopic cylinder and a clamping piece. The telescopic cylinder is installed on the frame, and the side of the bearing shell can be overlapped on the telescopic output rod of the telescopic cylinder; the two clamping pieces are spaced apart along the telescopic direction of the telescopic cylinder, and one is fixed on the frame, and the other is fixed on the rod end of the telescopic output rod of the telescopic cylinder. When the telescopic output rod is retracted, the two clamping pieces can be brought close to each other to clamp the middle bearing shell.

5. The bearing outer cylindrical grinding device according to claim 1, characterized in that: A support is provided on the frame, and a lift is provided on the support for controlling the support rod frame to slide up and down.

6. The bearing outer cylindrical grinding device according to claim 5, characterized in that: The support can slide forward and backward, and the frame is provided with a linear drive for controlling the support to slide forward and backward.

Images