Bearing unit for rolling ring support

Abstract

The bearing unit for the rolling ring support comprises a carrier roller ring and two bearing inner rings, the carrier roller ring is arranged on the two bearing inner rings in a sleeved mode, a rolling cavity is formed between the inner circumferential wall of the carrier roller ring and the outer circumferential walls of the two bearing inner rings, and two rows of rolling bodies are arranged in the rolling cavity in a rolling mode. The outer circumferential walls of the two bearing inner rings are detachably connected with fastening rings correspondingly, the two fastening rings are located on the two sides of the rolling cavity correspondingly, and the two fastening rings are each provided with two fastening screws in a threaded fit mode. Through holes which are in threaded connection with the adjacent set screws and are penetrated by the adjacent set screws to be in threaded fit with an external bracket shaft are formed in the positions, corresponding to the adjacent set screws, of the bearing inner ring in a penetrating manner; and sealing pieces for sealing the rolling cavity are arranged on the two sides of the rolling cavity. The special bearing for the rolling ring support of the cement mixer solves the problems that in the prior art, the cross section between the carrier roller ring and the bearing outer ring of the special bearing for the rolling ring support of the cement mixer is large, the dustproof and waterproof effects are poor, and the grease leakage phenomenon exists.

Description

Technical Field

[0001] The utility model relates to the technical field of special bearings for rolling ring brackets of cement mixer trucks, in particular to a bearing unit for a rolling ring bracket. Background Art

[0002] At present, in the installation of the roller ring bracket of the cement mixer truck, two sets of single-row tapered roller bearings are first installed in the roller ring, and grease is applied inside the bearing, and end covers and sealing rings are installed on the outside, and finally the bearings are pressed onto the bracket shaft to achieve the installation of the bearing on the roller ring bracket of the cement mixer truck. However, due to the close fit between the roller ring and the outer ring of the bearing, the cross-section between the roller ring and the outer ring of the bearing is prone to be too large after long-term trial use of the bearing, and there is a large clearance inside the bearing, which makes the product rigidity low, and the waterproof and dustproof effect of the end cover and the traditional sealing ring is not ideal, and there is also a grease leakage problem. At the same time, the bearing needs to be pressed onto the bracket shaft by a press, making each disassembly and subsequent maintenance more cumbersome. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the utility model provides a bearing unit for a roller bracket, which solves the problems of the special bearing for the roller bracket of the cement mixer truck in the prior art, such as the large cross-section between the roller ring and the outer ring of the bearing, poor dust and water proofing effect and grease leakage.

[0004] To achieve the above-mentioned purpose, the utility model provides a bearing unit for a rolling ring bracket, comprising a roller ring and two bearing inner rings, the roller ring is sleeved on the two bearing inner rings and a rolling cavity is formed between the inner circumferential wall of the roller ring and the outer circumferential walls of the two bearing inner rings, two rows of rolling bodies are rollingly arranged in the rolling cavity, and the outer circumferential walls of the two bearing inner rings are detachably connected with fixing rings, the two fixing rings are respectively located on both sides of the rolling cavity, and the two fixing rings are threadedly engaged with two fixing screws, and the corresponding adjacent fixing screw positions on the bearing inner rings are penetrated with through holes for threaded connection with adjacent fixing screws and for them to be penetrated to make them threadedly engaged with the external bracket shaft, and sealing members for closing the rolling cavity are arranged on both sides of the rolling cavity.

[0005] The advantages of adopting the above technical scheme are as follows: when assembling the bearing, the roller ring is set on the two bearing inner rings. At this time, a rolling cavity for the two rows of rolling elements is formed between the roller ring and the two rows of bearing inner rings, and then the operator installs the seal on both sides of the rolling cavity. After that, the operator fixes the fixing ring on the bearing inner ring by means of the fixing screw and makes the fixing screw cooperate with the thread of the external support shaft, so as to realize the fixation of the bearing inner ring on the external support shaft; in the above technology, the roller ring is set on the two bearing inner rings and the rolling elements are set between the two. Compared with the prior art, the roller ring is replaced by the bearing outer ring, so as to avoid the problem of bearing failure or operation accuracy being affected due to the excessive cross-section between the roller ring and the bearing outer ring in the prior art. At the same time, the setting of the roller ring can improve the overall impact resistance of the bearing, that is, the bearing Load capacity. Compared with the prior art in which a gap is easily formed between the roller ring and the outer ring of the bearing after long-term use of the bearing, resulting in the intrusion of water or impurities, the present technology directly replaces the outer ring of the bearing with the roller ring to meet the outdoor working conditions; the setting of the seal in the above technology is used to seal the rolling cavity to prevent external impurities from invading the rolling cavity and affecting the operating efficiency of the rolling element in the rolling cavity, and at the same time prevent the rolling element from being corroded and damaged and causing the bearing to fail. The setting of the seal can also prevent the grease filled in the rolling cavity from leaking to the outside and causing the rolling element to run dry; the setting of the locking screw in the above technology improves the efficiency of disassembly and assembly of the locking ring, so that the operator can separate the roller ring and the inner ring of the bearing by removing the locking ring. The locking ring plays a role of positioning and limiting, and the setting of the locking screw facilitates disassembly and subsequent maintenance by the operator.

[0006] The utility model is further configured as follows: the sealing member comprises a connecting ring arranged on the inner circumferential wall of the roller ring and an abutting ring arranged on the inner ring of the bearing, the connecting ring is bent with a deformable ring in the direction of the abutting ring, the inner circumferential wall of the deformable ring is connected to the outer circumferential wall of the abutting ring, a matching groove is provided in an annular direction on the inner side wall of the fixing ring, a bulge is raised on the outer side wall of the deformable ring in the direction of the matching groove, a recess is formed on the inner side wall of the deformable ring at a position corresponding to the bulge, the deformable ring is made of a shape memory alloy, the deformable ring has a first shape in a first temperature range, and the The deformable ring has a second form within the second temperature range. In the first form, the protrusion of the deformable ring is inserted into the matching groove and the outer wall of the protrusion is gap-matched with the inner circumferential wall of the matching groove. In the first form, the radial cross-section curvature of the protrusion of the deformable ring is set as a major arc. In the first form, the inner circumferential wall of the abutment ring and the outer circumferential wall of the bearing inner ring are gap-matched. In the second form, the radial cross-section curvature of the protrusion of the deformable ring is extended to be set in a minor arc shape. In the second form, the inner circumferential wall of the abutment ring and the outer circumferential wall of the bearing inner ring are abutted and matched.

[0007] The benefits of adopting the above technical solution are: when the bearing is running, the internal temperature of the bearing and the peripheral operating temperature will gradually increase. At this time, the temperature range can reach above 35 degrees. This temperature range is the first temperature range. At this time, the deformation ring has a first form in the first temperature range, and its raised portion is inserted into the matching groove, and the outer wall of the raised portion and the inner circumferential wall of the matching groove have a clearance fit. At the same time, in the first form, the inner circumferential wall of the abutment ring and the outer circumferential wall of the inner ring of the bearing have a clearance fit, so as to avoid long-term friction between the abutment ring and the inner ring of the bearing when the bearing runs at high speed, affecting the bearing operation efficiency, and at the same time avoiding excessive wear and tear of the abutment ring. In the above technology, in the first form, the raised portion is plug-fitted with the matching groove, and the radial cross-section of the raised portion is arc-shaped, so that a labyrinth groove is formed between it and the matching groove, so as to avoid the grease filled in the rolling cavity from leaking out or external impurities from invading the inside of the bearing when the bearing runs at high speed, causing the bearing operation efficiency to be affected, and at the same time, the shape The setting of the variable ring can prevent the axial movement or displacement of the roller ring by the cooperation of the deformation ring and the matching groove when the bearing is running at high speed and subjected to external axial load. At the same time, the above technology can also bear radial impact loads, thereby improving the impact resistance of the bearing; when the bearing is not running, the internal temperature of the bearing will gradually drop to below 35 degrees, and this temperature range is the second temperature range. At this time, the deformation ring has a second form in the second temperature range, and the deformation ring extends in the second form. At this time, the radial cross-section curvature of the raised part of the deformation ring is set in an inferior arc shape, that is, the distance between the outer peripheral wall of the raised part and the inner peripheral wall of the matching groove is increased to facilitate the disassembly and assembly of the bearing. At the same time, the deformation ring extends in the second form so that the inner peripheral wall of the abutment ring abuts and cooperates with the outer peripheral wall of the inner ring of the bearing, ensuring that external impurities will not invade the rolling cavity when the bearing is not running, causing the bearing to be affected, and at the same time preventing the grease filled in the rolling cavity from leaking to the outside world, causing the rolling body to be affected.

[0008] The utility model further provides that: in the first form, the distance between the outer peripheral wall of the most protruding end of the protrusion of the deformable ring and the inner peripheral wall of the matching groove is smaller than the distance between the outer peripheral walls at both ends of the protrusion and the inner peripheral wall of the matching groove.

[0009] The benefits of adopting the above technical solution are: in the above technology, the distance between the most protruding end of the outer peripheral wall of the raised part of the deformation ring in the first form and the inner peripheral wall of the matching groove is smaller than the distance between the outer peripheral walls at both ends of the raised part and the inner peripheral wall of the matching groove, that is, when the bearing is running, the distance between the most protruding end of the raised part and the inner peripheral wall of the matching groove is defined as A, and the distance between the outer peripheral walls at both ends of the raised part and the inner peripheral wall of the matching groove is defined as B. At this time, A is smaller than B, so that the sealing performance between the raised part and the matching groove is gradually increased when the bearing is running, which can effectively improve the sealing performance of the rolling cavity without affecting the bearing speed, avoid leakage of grease in the rolling cavity, and at the same time avoid external impurities from invading the rolling cavity to affect the rolling efficiency of the rolling body, thereby avoiding bearing operation failure.

[0010] The utility model is further provided that: a sealing gasket is provided on the inner peripheral wall of the abutment ring for abutting and cooperating with the outer peripheral wall of the inner ring of the bearing in the second form of the deformation ring.

[0011] The benefits of adopting the above technical solution are: the setting of the sealing gasket increases the service life of the abutment ring. At the same time, the sealing gasket can be made of elastic material. When the bearing is not running, the sealing gasket can be highly buckled on the outer peripheral wall of the inner ring of the bearing, thereby improving the sealing of the rolling cavity and preventing foreign impurities from invading the rolling cavity and causing bearing failure.

[0012] The utility model is further configured that: the roller ring is made of 42CrMo steel material.

[0013] The advantages of adopting the above technical solution are as follows: the roller ring in the above technology is made of 42CrMo steel material, which improves its load resistance and has a longer service life.

[0014] The utility model is further configured that: rolling tracks for adjacent rolling bodies are provided on the inner peripheral wall of the roller ring corresponding to the two rows of rolling bodies, and the rolling tracks are prepared by induction heating process.

[0015] The benefit of adopting the above technical solution is that the raceway of the roller ring in the above technology is prepared by induction heating process to ensure that its hardness is 58-62HRC, so that it has excellent wear resistance and improves its load resistance.

[0016] The utility model is further provided that: the Brinell hardness range of the core of the roller ring is 260-320.

[0017] The advantages of adopting the above technical solution are as follows: the Brinell hardness of the core of the roller ring in the above technology ranges from 260 to 320, thereby ensuring that the roller ring has high toughness and thus improving its ability to resist impact loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the utility model in operation state;

[0019] Figure 2 for Figure 1 A partial enlarged view of part A;

[0020] Figure 3 It is a cross-sectional view of the utility model in a non-operating state;

[0021] Figure 4 for Figure 3 A partial enlarged view of part B. DETAILED DESCRIPTION

[0022] The utility model provides a bearing unit for a roller support, comprising a roller ring 1 and two bearing inner rings 2, wherein the roller ring 1 is sleeved on the two bearing inner rings 2 and a rolling cavity 21 is formed between the inner circumferential wall of the roller ring 1 and the outer circumferential walls of the two bearing inner rings 2, wherein two rows of rolling bodies 3 are rollingly arranged in the rolling cavity 21, and the outer circumferential walls of the two bearing inner rings 2 are detachably connected with fixing rings 4, the two fixing rings 4 are respectively located on both sides of the rolling cavity 21, and the two fixing rings 4 are threadedly matched with two fixing screws 41, and the positions of the corresponding adjacent fixing screws 41 on the bearing inner ring 2 are penetrated with threads for being threadedly connected with the adjacent fixing screws 41 and for being penetrated so as to be connected with the outside The through hole 22 of the bracket shaft thread is matched, and seals for closing the rolling cavity 21 are arranged on both sides of the rolling cavity 21. The seals include a connecting ring 51 arranged on the inner circumferential wall of the roller ring 1 and an abutting ring 52 arranged on the inner ring 2 of the bearing. The connecting ring 51 is bent with a deformable ring 5 toward the abutting ring 52. The inner circumferential wall of the deformable ring 5 is connected to the outer circumferential wall of the abutting ring 52. A matching groove 42 is circumferentially opened on the inner side wall of the fixing ring 4. A raised portion 53 is raised on the outer side wall of the deformable ring 5 toward the matching groove 42. A recessed portion is formed on the inner side wall of the deformable ring 5 corresponding to the raised portion 53. The deformable ring 5 is made of shape memory alloy. The ring 5 has a first form in the first temperature range, and the deformable ring 5 has a second form in the second temperature range. In the first form, the raised portion 53 of the deformable ring 5 is inserted into the matching groove 42, and the outer wall of the raised portion 53 is gap-matched with the inner wall of the matching groove 42. In the first form, the raised portion 53 of the deformable ring 5 has a major arc setting in the radial cross-section. In the first form, the deformable ring 5 is gap-matched between the inner wall of the abutting ring 52 and the outer wall of the bearing inner ring 2. In the second form, the deformable ring 5 extends the raised portion 53 in the radial cross-section to have a minor arc setting. In the second form, the deformable ring 5 abuts against the inner wall of the ring 52 and the outer wall of the bearing inner ring 2 The abutment is arranged, and the distance between the most protruding end outer wall of the ridge 53 of the deformation ring 5 in the first form and the inner wall of the matching groove 42 is smaller than the distance between the outer walls at both ends of the ridge 53 and the inner wall of the matching groove 42. A sealing gasket 54 is arranged on the inner wall of the abutment ring 52 for abutting and matching with the outer wall of the bearing inner ring 2 in the second form of the deformation ring 5. The roller ring 1 is made of 42CrMo steel material. The inner wall of the roller ring 1 is provided with raceways 11 for rolling of adjacent rolling bodies 3 at positions corresponding to two rows of rolling bodies 3. The raceway 11 is prepared by induction heating process. The Brinell hardness range of the core of the roller ring 1 is 260-320.

[0023] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A bearing unit for a roller support, characterized in that: It includes a roller ring and two bearing inner rings, the roller ring is sleeved on the two bearing inner rings and a rolling cavity is formed between the inner circumferential wall of the roller ring and the outer circumferential walls of the two bearing inner rings, two rows of rolling bodies are rollingly arranged in the rolling cavity, and the outer circumferential walls of the two bearing inner rings are detachably connected with fixing rings, the two fixing rings are respectively located on both sides of the rolling cavity, and the two fixing rings are threadedly matched with two fixing screws, and the corresponding adjacent fixing screw positions on the bearing inner rings are penetrated with through holes for threaded connection with adjacent fixing screws and for them to be penetrated to make them match with the external support shaft thread, and sealing members for closing the rolling cavity are arranged on both sides of the rolling cavity.

2. A bearing unit for a roller support according to claim 1, characterized in that: The sealing member comprises a connecting ring arranged on the inner circumferential wall of the roller ring and an abutting ring arranged on the inner ring of the bearing, the connecting ring is bent with a deformable ring in the direction of the abutting ring, the inner circumferential wall of the deformable ring is connected to the outer circumferential wall of the abutting ring, a matching groove is provided in an annular direction on the inner side wall of the fixing ring, a bulge is raised on the outer side wall of the deformable ring in the direction of the matching groove, a recess is formed on the inner side wall of the deformable ring at a position corresponding to the bulge, the deformable ring is made of a shape memory alloy, the deformable ring has a first shape in a first temperature range, and the deformable ring is The deformable ring has a second form within the second temperature range. In the first form, the raised portion of the deformable ring is inserted into the matching groove and the outer wall of the raised portion is gap-matched with the inner circumferential wall of the matching groove. In the first form, the radial cross-section curvature of the raised portion of the deformable ring is set as a major arc. In the first form, the inner circumferential wall of the abutment ring and the outer circumferential wall of the bearing inner ring are gap-matched. In the second form, the deformable ring extends the radial cross-section curvature of the raised portion to be set in a minor arc shape. In the second form, the inner circumferential wall of the abutment ring and the outer circumferential wall of the bearing inner ring are abutted and matched.

3. A bearing unit for a roller support according to claim 2, characterized in that: In the first form, the distance between the outer peripheral wall of the most protruding end of the protrusion of the deformable ring and the inner peripheral wall of the matching groove is smaller than the distance between the outer peripheral walls at both ends of the protrusion and the inner peripheral wall of the matching groove.

4. A bearing unit for a roller support according to claim 2, characterized in that: A sealing gasket is arranged on the inner peripheral wall of the abutment ring for abutting and cooperating with the outer peripheral wall of the inner ring of the bearing in the second form of the deformation ring.

5. The bearing unit for a roller support according to claim 1, characterized in that: The roller ring is made of 42CrMo steel material.

6. A bearing unit for a roller support according to claim 1, characterized in that: The inner peripheral wall of the roller ring is provided with rolling tracks for the adjacent rolling bodies to roll at positions corresponding to the two rows of rolling bodies, and the rolling tracks are prepared by induction heating process.

7. A bearing unit for a roller support according to claim 1, characterized in that: The Brinell hardness of the core of the roller ring ranges from 260 to 320.

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