Main shaft bearing pre-tightening device of horizontal machining center
By introducing moving and limiting components into the preload device of the spindle bearing in a horizontal machining center, the problem of inaccurate preload control was solved, enabling stable and reliable bearing operation, extending service life, and improving equipment stability.
Patent Information
- Application Number
- CN202520579328.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-31
AI Technical Summary
Existing preload devices for spindle bearings in horizontal machining centers are difficult to control precisely, which can easily lead to over-preload, resulting in bearing wear and shortened service life, thus affecting equipment stability and economic benefits.
By employing movable and limiting components, the bearing preload is precisely controlled through sliding and rotating mechanisms to prevent over-preload. The components, including fixed blocks, sliding shafts, trigger rods, sliding rods, rotating shafts, and threaded rods, work together to position and limit the bearing.
It effectively prevents over-preload of bearings, reduces wear, extends bearing service life, and improves the stability of the preload structure and the reliability of equipment operation.
Smart Images
Figure CN223917277U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to horizontal machining center main shaft bearing technical field, concretely is a horizontal machining center main shaft bearing pre -tightening device. BACKGROUND
[0002] In the modern mechanical processing field, horizontal machining center is widely used in aerospace, automobile manufacturing, precision mould and many other industries with the advantages of high precision, high efficiency and being able to complete the processing of complex parts. And the main shaft as the key component of horizontal machining center, its performance directly affects the machining precision, machining efficiency and the overall stability of the equipment, the main shaft bearing needs to be in the appropriate pre -tightening state in the working process, to ensure that the main shaft has good rotation accuracy, axial stiffness and carrying capacity. Appropriate pre -tightening can effectively reduce the play of bearing when running, reduce vibration, improve the accuracy of the relative position of tool and workpiece during processing, and further improve the machining precision.
[0003] But the existing horizontal machining center main shaft bearing pre -tightening device when using, often rely on the experience of operating personnel or relatively simple mechanical structure to realize pre -tightening operation, when manually tightening nut and other ways are used to apply pre -tightening force to the bearing, it is difficult to accurately judge whether the pre -tightening degree is appropriate, and the pre -tightening is insufficient or excessive, when pre -tightening is excessive, the bearing will bear excessive axial force and friction, which will accelerate the wear of the internal parts of the bearing, such as raceway, rolling element and other key parts, fatigue damage, deformation and even rupture, etc. greatly shorten the service life of the bearing, also increase the maintenance cost and downtime of the equipment, seriously affect the production efficiency and economic benefit of horizontal machining center. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a horizontal machining center main shaft bearing pre -tightening device, which solves the problem of excessive pre -tightening of the bearing caused by manually tightening the nut and other ways during the pre -tightening process of the existing technology.
[0005] To achieve the above purpose, the utility model provides the following technical scheme:
[0006] A horizontal machining center main shaft bearing pre -tightening device, including the shaft body arranged in the machine body, the shaft body surface is connected with the bearing, the shaft body is fixedly installed with the threaded sleeve in the inside, the threaded sleeve surface is connected with the bolt in the screw thread,
[0007] It also includes a movable assembly for accurately controlling the pre -tightening force of the bearing,
[0008] The limiting assembly is used to improve the effect of bearing pre -tightening force control,
[0009] The active assembly comprises a fixed block fixedly installed on the surface of the shaft body, a sliding block in sliding connection with the surface of the threaded sleeve, a limiting shaft fixedly installed in the fixed block, a sliding shaft in sliding connection with the inside of the limiting shaft, a trigger lever fixedly installed on the top of the sliding shaft, a fixed rod fixedly installed in the fixed block, a sliding rod in sliding connection with the inside of the fixed rod, the sliding rod being fixedly installed on the inside of the trigger lever, and a plug rod penetrating through the inside of the fixed rod.
[0010] Preferably, a resisting block is fixedly installed on the surface of the plug rod, the resisting block being in sliding connection with the inside of the fixed rod, a fixed spring is fixedly installed on the surface of the plug rod, and the fixed spring is fixedly installed on the outer wall of the fixed rod.
[0011] Preferably, a sliding rod is fixedly installed on the top of the sliding rod, a rotating shaft is arranged on the surface of the sliding rod, a threaded rod is fixedly installed in the inside of the rotating shaft, a resisting shaft is in threaded connection with the surface of the threaded rod, and the resisting shaft is in sliding connection with the inside of the fixed block.
[0012] Preferably, the limiting assembly comprises a connecting rod fixedly installed on the outer wall of the sliding shaft, a plug plate is hingedly connected to the surface of the connecting rod, a plug block is hingedly connected to the bottom of the plug plate, the plug block is in sliding connection with the inside of the fixed block, and a positioning block is fixedly installed in the inside of the fixed block.
[0013] Preferably, a positioning shaft is in sliding connection with the inside of the positioning block, a rectangular block is fixedly installed on the inside of the positioning shaft, a movable spring is fixedly installed on the surface of the positioning shaft, and the movable spring is fixedly installed in the inside of the positioning block.
[0014] Preferably, a sliding groove is arranged on the surface of the limiting shaft, and an arc-shaped groove is arranged on the surface of the rotating shaft.
[0015] Preferably, the resisting block is rectangular in transverse section, and a groove is arranged on the bottom of the positioning block.
[0016] By means of the above technical scheme, the utility model provides a horizontal machining center main shaft bearing pre-tightening device.
[0017] (1)The utility model discloses a setting of movable assembly, bearing is resisted on the surface of fixed block, and also will be resisted on the surface of sliding shaft, and sliding shaft, trigger lever and slide bar are driven to slide, and the bearing movement is limited by the sliding of slide bar, and the sliding rod of top is also driven to slide when the slide bar slides, and the rotation of rotating shaft and threaded rod is driven when the sliding rod slides, and the bearing in pre -tightening is positioned when threaded rod rotates, prevents bearing pre -tightening excessive and makes bearing bear too big axial force, friction force etc., reduces the abnormal wear of each part in bearing interior, makes it can work stably and reliably for a longer time, thereby prolongs its overall service life.
[0018] (2)The utility model discloses a setting of limiting component, and sliding shaft slides and drives the sliding of connecting rod, and when connecting rod slides, and the insertion block is moved to the inboard of positioning block by the insertion of insertion plate, and is first resisted at the rectangular section of rectangular block, makes rectangular block and positioning axle move upwards, and when the insertion block is inserted in the inside of positioning block, and positioning axle resets under the action of movable spring, thereby drives rectangular block insertion block insertion block inside and is limited, avoids the destruction of bearing pre -tightening state, makes the whole bearing pre -tightening related structure connection more firm and reliable, guarantees that bearing can maintain in the pre -tightening state of setting, improves the stability of pre -tightening structure in the equipment operation process. DRAWINGS
[0019] The drawings described herein are used to provide further understanding of the utility model and constitute a part of this application:
[0020] Figure 1 It is the overall front view structure schematic diagram of the utility model;
[0021] Figure 2 It is the overall overhead structure schematic diagram in the utility model;
[0022] Figure 3 It is the bearing front view structure schematic diagram in the utility model;
[0023] Figure 4 It is the shaft body front view structure schematic diagram in the utility model;
[0024] Figure 5 It is the movable assembly front view structure schematic diagram in the utility model;
[0025] Figure 6 It is the rotating shaft section structure schematic diagram in the utility model;
[0026] Figure 7 It is the fixed rod section structure schematic diagram in the utility model;
[0027] Figure 8This is a front view schematic diagram of the limiting component in this utility model;
[0028] Figure 9 This is a front view schematic diagram of the positioning block in this utility model.
[0029] In the diagram: 1. Body; 2. Shaft; 3. Bearing; 4. Threaded sleeve; 5. Bolt; 6. Moving component; 61. Fixed block; 62. Slider; 63. Limiting shaft; 64. Sliding shaft; 65. Trigger rod; 66. Fixed rod; 67. Sliding rod; 68. Insert rod; 69. Abutment block; 610. Sliding rod; 611. Rotating shaft; 612. Threaded rod; 613. Abutment shaft; 614. Fixed spring; 7. Limiting component; 71. Connecting rod; 72. Insert plate; 73. Insert block; 74. Positioning block; 75. Positioning shaft; 76. Rectangular block; 77. Moving spring; 630. Slide groove; 6110. Arc groove; 740. Groove. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0031] Example 1
[0032] A preload device for the spindle bearing of a horizontal machining center, such as Figures 1-7 As shown, it includes a shaft 2 disposed inside the machine body 1, a bearing 3 slidably connected to the surface of the shaft 2, a threaded sleeve 4 fixedly installed inside the shaft 2, and a bolt 5 threadedly connected to the surface of the threaded sleeve 4.
[0033] It also includes a movable component 6 for precise control of the preload force of the bearing 3;
[0034] Limiting component 7 is used to improve the effect of bearing 3 preload control;
[0035] First, the movable assembly 6 comprises: a fixed block 61 fixedly installed on the surface of the shaft body 2, a sliding block 62 slidingly connected to the surface of the threaded sleeve 4, a limiting shaft 63 fixedly installed inside the fixed block 61, a sliding shaft 64 slidingly connected inside the limiting shaft 63, a trigger rod 65 fixedly installed at the top of the sliding shaft 64, a fixed rod 66 fixedly installed inside the fixed block 61, a sliding rod 67 slidingly connected inside the fixed rod 66, the sliding rod 67 being fixedly installed on the inner side of the trigger rod 65, a plug rod 68 penetrating through the inside of the fixed rod 66, a resisting block 69 fixedly installed on the surface of the plug rod 68, the resisting block 69 being slidingly connected inside the fixed rod 66, a fixed spring 614 fixedly installed on the surface of the plug rod 68, the fixed spring 614 being fixedly installed on the outer wall of the fixed rod 66. The fixed spring 614 can be used to reset the plug rod 68 after use.
[0036] Secondly, the sliding rod 67 has a sliding rod 610 fixedly installed at the top, the sliding rod 610 is provided with a rotating shaft 611 on the surface, the rotating shaft 611 has a threaded rod 612 fixedly installed inside, the threaded rod 612 is threadedly connected with a resisting shaft 613 on the surface, and the resisting shaft 613 is slidingly connected inside the fixed block 61. The rotating shaft 611 can drive the threaded rod 612 to rotate, and the resisting shaft 613 moves away from the surface of the fixed block 61.
[0037] In this embodiment, when the bearing 3 abuts against the surface of the fixed block 61, the bearing 3 also abuts against the surface of the sliding shaft 64, drives the sliding shaft 64 and the trigger rod 65 to slide, drives the sliding rod 67 to slide inside the fixed rod 66, drives the plug rod 68 to slide downward by pushing the resisting block 69, and plugs into the sliding groove 630 of the limiting shaft 63 to limit the movement of the bearing 3. When the sliding rod 67 slides, the sliding rod 610 at the top also slides, drives the rotating shaft 611 and the threaded rod 612 to rotate, and drives the resisting shaft 613 to move away from the surface of the fixed block 61, thereby positioning the bearing 3 during pre-tightening. The bearing 3 is prevented from being pre-tightened too much to cause the bearing 3 to bear too much axial force, friction and the like, abnormal wear of components inside the bearing 3 is reduced, the bearing 3 can work stably and reliably for a longer time, and the overall service life is prolonged.
[0038] Embodiment 2
[0039] As shown in Figures 8-9 The limiting assembly 7 comprises: a connecting rod 71 fixedly installed on the outer wall of the sliding shaft 64, an insertion plate 72 hingedly connected to the surface of the connecting rod 71, an insertion block 73 hingedly connected to the bottom of the insertion plate 72, the insertion block 73 being slidingly connected inside the fixed block 61, and a positioning block 74 fixedly installed inside the fixed block 61.
[0040] Further, the positioning block 74 is slidably connected with a positioning shaft 75, a rectangular block 76 is fixedly installed on the inner side of the positioning shaft 75, a movable spring 77 is fixedly installed on the surface of the positioning shaft 75, and the movable spring 77 is fixedly installed in the interior of the positioning block 74. The reset effect of the positioning shaft 75 after use can be realized through the arrangement of the movable spring 77.
[0041] Finally, the limiting shaft 63 is provided with a sliding groove 630 on the surface, the sliding groove 630 on the surface of the limiting shaft 63 can drive the trigger lever 65 and the connecting rod 71 to slide in the inner side of the limiting shaft 63, the rotating shaft 611 is provided with an arc-shaped groove 6110 on the surface, the arc-shaped groove 6110 on the surface of the rotating shaft 611 can drive the rotating shaft 611 to rotate when the sliding rod 610 slides, the transverse section of the abutting block 69 is rectangular, the rectangular abutting block 69 can improve the abutting effect of the sliding rod 67 on the abutting block 69, the positioning block 74 is provided with a recess 740 at the bottom, and the recess 740 at the bottom of the positioning block 74 can realize the effect of limiting the insertion block 73 to be inserted in the interior of the positioning block 74 when moving.
[0042] In the embodiment, through the arrangement of the limiting assembly 7, the sliding of the sliding shaft 64 can drive the sliding of the connecting rod 71, the sliding of the connecting rod 71 can drive the insertion block 73 to move to the inner side close to the positioning block 74 through the abutting of the insertion plate 72, and the insertion block 73 is first abutted at the rectangular section of the rectangular block 76, so that the rectangular block 76 and the positioning shaft 75 move upward, when the insertion block 73 is inserted in the interior of the positioning block 74, the positioning shaft 75 is reset under the action of the movable spring 77, so as to drive the rectangular block 76 to be inserted in the insertion block 73 to limit, avoid the pre-tightening state of the bearing 3 from being damaged, make the structure connection related to the pre-tightening of the bearing 3 more firm and reliable, ensure that the bearing 3 can continuously maintain in the set pre-tightening state, and improve the stability of the pre-tightening structure in the equipment running process.
[0043] The utility model discloses a horizontal machining center main shaft bearing pre -tightening device can be through the bearing 3 is connected in the surface of shaft body 2 when using, through the surface twist bolt 5 of threaded sleeve 4 in the inside of shaft body 2, and the surface of bearing 3 is moved to bearing 3 to fixed block 61's surface is pre -tightening effect is pushed, and when bearing 3 is in contact with the surface of fixed block 61, it will also be in contact with the surface of sliding shaft 64, and sliding shaft 64 and trigger lever 65 are driven to slide in the inside of limiting shaft 63, when trigger lever 65 slides, sliding rod 67 is driven to slide in the inside of fixed rod 66, when sliding rod 67 slides, the surface of abutting block 69 in the inside of fixed rod 66 is contacted, and the abutting block 69 is driven to slide down, when the plug rod 68 slides down, it is inserted in the sliding groove 630 of limiting shaft 63, and the movement of bearing 3 is limited, and when sliding rod 67 slides, the sliding rod 610 of top is also driven to slide, when sliding rod 610 slides, the rotation of rotating shaft 611 is driven through the arc slot 6110 on the surface of rotating shaft 611, when rotating shaft 611 rotates, the rotation of threaded rod 612 is driven, when threaded rod 612 rotates, the surface of abutting shaft 613 is moved away from fixed block 61, thereby positioning bearing 3 in pre -tightening, prevent bearing 3 from pre -tightening excessively and make bearing 3 bear too big axial force, friction and the like, reduce the abnormal wear of each part in the inside of bearing 3, help to maintain the good mechanical properties of bearing 3, make it can work stably and reliably for a longer period of time, thereby prolonging the overall service life.
[0044] When sliding shaft 64 slides, the sliding of connecting rod 71 is also driven, when connecting rod 71 slides, the insertion block 73 is contacted in fixed block 61 and moves to the inside of positioning block 74, when insertion block 73 moves, it is first contacted in the rectangular section of rectangular block 76, and rectangular block 76 and positioning shaft 75 are moved upwards, when insertion block 73 is inserted in the inside of positioning block 74, positioning shaft 75 is reset under the action of movable spring 77, thereby driving rectangular block 76 to be inserted in insertion block 73 and being limited, avoiding the pre -tightening state of bearing 3 from being destroyed, can make insertion block 73 stably be in positioning block 74, make the structure connection related to bearing 3 pre -tightening more firm and reliable, guarantee that bearing 3 can continuously maintain in the pre -tightening state of setting, will not appear pre -tightening failure because of some slight vibration, interference and other factors in the outside, guarantee the stability of pre -tightening structure in the equipment operation process.
[0045] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.
[0046] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.
Claims
1. A preload device for a spindle bearing of a horizontal machining center, comprising a shaft (2) disposed within a machine body (1), characterized in that: The shaft (2) is slidably connected to a bearing (3), and a threaded sleeve (4) is fixedly installed inside the shaft (2). The threaded sleeve (4) is threadedly connected to a bolt (5). It also includes a movable component (6) for precise control of the preload of the bearing (3); The limiting component (7) is used to improve the effect of bearing (3) preload control; The active component (6) includes: a fixing block (61), which is fixedly installed on the surface of the shaft (2); a slider (62) is slidably connected to the surface of the threaded sleeve (4); a limiting shaft (63) is fixedly installed inside the fixing block (61); a sliding shaft (64) is slidably connected inside the limiting shaft (63); a trigger rod (65) is fixedly installed on the top of the sliding shaft (64); a fixing rod (66) is fixedly installed inside the fixing block (61); a sliding rod (67) is slidably connected inside the fixing rod (66); the sliding rod (67) is fixedly installed inside the trigger rod (65); and an insert rod (68) passes through the fixing rod (66).
2. The preload device for the spindle bearing of a horizontal machining center according to claim 1, characterized in that: A contact block (69) is fixedly installed on the surface of the insertion rod (68), and the contact block (69) is slidably connected to the inside of the fixing rod (66). A fixing spring (614) is fixedly installed on the surface of the insertion rod (68), and the fixing spring (614) is fixedly installed on the outer wall of the fixing rod (66).
3. The preload device for the spindle bearing of a horizontal machining center according to claim 1, characterized in that: A sliding rod (610) is fixedly installed on the top of the sliding rod (67). A rotating shaft (611) is provided on the surface of the sliding rod (610). A threaded rod (612) is fixedly installed inside the rotating shaft (611). An abutment shaft (613) is threadedly connected to the surface of the threaded rod (612). The abutment shaft (613) is slidably connected to the inner side of the fixed block (61).
4. The preload device for the spindle bearing of a horizontal machining center according to claim 2, characterized in that: The limiting component (7) includes: a connecting rod (71), which is fixedly installed on the outer wall of the sliding shaft (64), a plate (72) is hinged to the surface of the connecting rod (71), a block (73) is hinged to the bottom of the plate (72), the block (73) is slidably connected to the inside of the fixing block (61), and a positioning block (74) is fixedly installed inside the fixing block (61).
5. A preload device for a horizontal machining center spindle bearing according to claim 4, characterized in that: The positioning block (74) is slidably connected to a positioning shaft (75), a rectangular block (76) is fixedly installed on the inner side of the positioning shaft (75), and a movable spring (77) is fixedly installed on the surface of the positioning shaft (75). The movable spring (77) is fixedly installed inside the positioning block (74).
6. The preload device for the spindle bearing of a horizontal machining center according to claim 3, characterized in that: The surface of the limiting shaft (63) is provided with a sliding groove (630), and the surface of the rotating shaft (611) is provided with an arc-shaped groove (6110).
7. A preload device for a horizontal machining center spindle bearing according to claim 4, characterized in that: The cross-section of the contact block (69) is rectangular, and the bottom of the positioning block (74) is provided with a groove (740).