High-speed precise main shaft pre-tightening structure

Abstract

The utility model belongs to the technical field of main shaft pre-tightening, and particularly relates to a high-speed precise main shaft pre-tightening structure which comprises a cylinder body, left-right penetrating type through holes are formed in the centers of the left side and the right side in the cylinder body, and a main shaft is rotationally connected between the two through holes through a bearing. Mounting grooves penetrating up and down are formed in the upper surface and the lower surface of the center of the interior of the barrel, mounting blocks are mounted in the mounting grooves, mounting assemblies are arranged between the interiors of the mounting blocks and the interiors of the mounting grooves, and pre-tightening assemblies are arranged between the mounting blocks and the main shaft; according to the pre-tightening structure, the main shaft rotating in the barrel is pre-tightened through the pre-tightening assembly, the main shaft can rotate more stably, the pre-tightening borne by the main shaft can be adjusted through the pre-tightening assembly, and therefore the pre-tightening structure can meet more use requirements and is high in functionality.

Description

Technical Field

[0001] The utility model relates to the technical field of spindle pre-tightening, in particular to a high-speed precision spindle pre-tightening structure. Background Art

[0002] The spindle is the shaft that receives power from the engine or motor and transmits it to other parts. The preload structure is the core part of the spindle preload. It applies preload force to eliminate the axial clearance and radial vibration of the spindle when it is running at high speed, thereby improving the rotation accuracy and stability of the spindle.

[0003] The existing patented high-speed precision spindle pre-tightening structure (publication number: CN220614849U) mainly solves the problem that the current spindle does not have a good pre-tightening adjustment mechanism when it is long, which will cause difficulty in discharging when in use. It is characterized in that: at least two support rods (4) are provided in the cylinder, and the support rods are correspondingly arranged at the two ends of the spindle, and each of the support rods is provided with an elastically supported rolling element (41), and the rolling element presses the spindle in the radial direction, and the rolling element rolls with the spindle when the spindle rotates. The utility model provides a high-speed precision spindle pre-tightening structure, which can pre-tighten and align the spindle, and can better achieve the function of discharging.

[0004] However, the existing high-speed precision spindle pre-tightening structure is inconvenient to disassemble and replace the elastic parts after using it for a period of time, and the elastic effect decreases after a long period of use, which affects the use effect of the pre-tightening structure, making it less practical. Therefore, a high-speed precision spindle pre-tightening structure is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve the problem that the existing high-speed precision spindle pre-tightening structure is inconvenient to disassemble and replace the elastic parts after using it for a period of time, and the elastic effect decreases after a long period of use, thereby affecting the use effect of the pre-tightening structure, making it not practical enough, the utility model proposes a high-speed precision spindle pre-tightening structure.

[0006] The technical solution adopted by the utility model to solve the technical problem is: the high-speed precision spindle pre-tightening structure described in the utility model comprises a cylinder;

[0007] The center of the left and right sides of the cylinder body is provided with left and right through holes, and a main shaft is rotatably connected between the two through holes through a bearing;

[0008] The upper and lower surfaces of the inner center of the cylinder are provided with an installation groove that penetrates from top to bottom, a mounting block is installed inside the installation groove, and an installation component is arranged between the inside of the installation block and the inside of the installation groove;

[0009] A pre-tightening assembly is arranged between the mounting block and the main shaft.

[0010] Preferably, the pre-tightening assembly includes a connecting rod, and one end of the connecting rod away from the center of the cylinder is fixedly connected to a side of the mounting block close to the center of the cylinder, a sliding groove is provided inside the connecting rod, and the interior of the sliding groove is communicated with the interior of the cylinder, a fixing ring is fixedly connected inside the sliding groove, a sliding ring is slidably connected inside the sliding groove, a spring three is placed between the sliding ring and the fixing ring, a pre-tightening rod is fixedly connected inside the sliding ring, and the end of the pre-tightening rod away from the center of the cylinder penetrates the spring three and the fixing ring, and the end of the pre-tightening rod close to the center of the cylinder is fixedly connected to a guide block, a circle of continuous guide grooves is provided at the center of the outer surface of the spindle, and the guide block is inserted into the guide groove and movably connected to the guide groove.

[0011] Preferably, the outer surface of the guide block and the inner side wall of the guide groove are both arranged in an arc shape.

[0012] Preferably, the mounting assembly includes two inner grooves, and the two inner grooves are respectively opened at the front and rear of the mounting block, an extrusion plate is slidably connected to the inner part of the inner groove, a vertical through groove is opened at the center of the inner upper surface of the inner groove, a spring 1 is fixedly connected between the top of the extrusion plate and the inner upper surface of the inner groove, a pull rod is fixedly connected at the center of the top of the extrusion plate, and the top end of the pull rod passes through the spring 1 and the through groove, a slot is opened on the side of the extrusion plate away from the inner center of the mounting block, and a front-to-back through hole is opened on the side of the inner groove away from the inner center of the mounting block, and the through hole is inside A mounting rod is slidably connected, mounting holes are provided on both the front and rear surfaces of the mounting groove, and one end of the mounting rod away from the inner center of the mounting block is inserted into the mounting hole, and one end of the mounting rod close to the inner center of the mounting block is fixedly connected to a clamping block, and the outer surface of the clamping block is in contact with a side of the extrusion plate away from the inner center of the mounting block, and a spring 2 is sleeved on the outer surface of the mounting rod located inside the through hole, and one end of the spring 2 close to the inner center of the mounting block is fixedly connected to the outer surface of the mounting rod, and one end of the spring 2 away from the inner center of the mounting block is fixedly connected to the inner side wall of the through hole.

[0013] Preferably, the outer surface of the card block and the inner side wall of the card slot are both arranged in an arc shape.

[0014] Preferably, the card block is adapted to the card slot.

[0015] Preferably, one end of the pull rod away from the inner center of the cylinder penetrates through one side of the mounting block away from the inner center of the cylinder and is fixedly connected with a handle.

[0016] The utility model is beneficial in that:

[0017] 1. The utility model facilitates the installation and disassembly of the installation block and the installation groove through the installation assembly, and facilitates the disassembly, maintenance and replacement of the pre-tightening assembly fixedly connected to the installation block, so that the pre-tightening structure is easy to use and has strong practicality.

[0018] 2. The utility model pre-tightens the main shaft rotating inside the cylinder through the pre-tightening component, so that the main shaft can rotate more stably, and the pre-tightening of the main shaft can also be adjusted through the pre-tightening component, so that the pre-tightening structure can meet more usage requirements and has strong functionality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure in the first embodiment;

[0021] Figure 2 It is a schematic diagram of the front cross-section structure in the first embodiment;

[0022] Figure 3 It is a schematic diagram of a partial left-section structure in Embodiment 1;

[0023] Figure 4 For Example 1 Figure 3 The enlarged structural diagram at A in the middle;

[0024] Figure 5 This is a schematic diagram of the handle structure in the second embodiment.

[0025] In the figure: 1. cylinder; 2. mounting groove; 3. mounting assembly; 301. through groove; 302. pull rod; 303. inner groove; 304. spring one; 305. extrusion plate; 306. clamping groove; 307. through hole; 308. mounting rod; 309. mounting hole; 310. spring two; 311. clamping block; 312. handle; 4. mounting block; 5. through hole; 6. main shaft; 7. preload assembly; 701. guide groove; 702. guide block; 703. preload rod; 704. connecting rod; 705. slide groove; 706. fixing ring; 707. spring three; 708. sliding ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1

[0028] See also Figure 1-4 As shown, a high-speed precision spindle pre-tightening structure comprises a cylinder 1;

[0029] The center of the left and right sides of the cylinder 1 is provided with left and right through holes 5, and a main shaft 6 is rotatably connected between the two through holes 5 via a bearing;

[0030] The cylinder 1 is provided with a vertically penetrating installation groove 2 on both the upper and lower surfaces at the center thereof, a mounting block 4 is installed inside the installation groove 2, and an installation component 3 is provided between the inside of the installation block 4 and the inside of the installation groove 2;

[0031] A pre-tightening component 7 is arranged between the mounting block 4 and the main shaft 6; during operation, the main shaft 6 rotating inside the cylinder 1 is pre-tightened by the pre-tightening component 7, and the main shaft 6 can rotate more stably, and the pre-tightening of the main shaft 6 can also be adjusted by the pre-tightening component 7, so that the pre-tightening structure can meet more usage requirements and has strong functionality. At the same time, the mounting component 3 facilitates the installation and disassembly of the mounting block 4 and the mounting groove 2, and facilitates the disassembly, maintenance and replacement of the pre-tightening component 7 fixedly connected to the mounting block 4, so that the pre-tightening structure is easy to use and has strong practicality.

[0032] The pre-tightening assembly 7 includes a connecting rod 704, and one end of the connecting rod 704 away from the inner center of the cylinder 1 is fixedly connected to a side of the mounting block 4 close to the inner center of the cylinder 1, a sliding groove 705 is provided inside the connecting rod 704, and the interior of the sliding groove 705 is communicated with the interior of the cylinder 1, a fixing ring 706 is fixedly connected inside the sliding groove 705, a sliding ring 708 is slidably connected inside the sliding groove 705, a spring three 707 is placed between the sliding ring 708 and the fixing ring 706, a pre-tightening rod 703 is fixedly connected inside the sliding ring 708, and one end of the pre-tightening rod 703 away from the inner center of the cylinder 1 penetrates the spring three 707 and the fixing ring 706, and the pre-tightening rod 703 close to the inner center of the cylinder 1 A guide block 702 is fixedly connected to one end, and a circle of continuous guide grooves 701 is provided at the center of the outer surface of the main shaft 6. The guide block 702 is inserted into the guide groove 701 and is movably connected to the guide groove 701. During operation, when the main shaft 6 rotates, the guide block 702 rotates under the limit of the rotation inside the guide groove 701, and the rotation of the main shaft 6 is made more stable. The pre-tightening rod 703 can be squeezed by the guide block 702 so that the sliding ring 708 slides inside the sliding groove 705 to squeeze the spring three 707 for pre-tightening adjustment, and the pre-tightening assembly 7 can pre-tighten the main shaft 6. At the same time, after the sliding ring 708 is moved to drive the pre-tightening rod 703 to be removed from the inside of the connecting rod 704, the spring three 707 placed between the sliding ring 708 and the fixed ring 706 can be disassembled and replaced.

[0033] The outer surface of the guide block 702 and the inner wall of the guide groove 701 are both arranged in an arc shape; during operation, the guide block 702 is convenient to rotate inside the guide groove 701 .

[0034] The mounting assembly 3 includes two inner grooves 303, and the two inner grooves 303 are respectively opened at the front and rear of the mounting block 4, and an extrusion plate 305 is slidably connected inside the inner groove 303, and a through groove 301 that penetrates up and down is opened at the center of the inner upper surface of the inner groove 303, and a spring 1 304 is fixedly connected between the top of the extrusion plate 305 and the inner upper surface of the inner groove 303, and a pull rod 302 is fixedly connected at the center of the top of the extrusion plate 305, and the top of the pull rod 302 penetrates the spring 1 304 and the through groove 301, and a slot 306 is opened on the side of the extrusion plate 305 away from the inner center of the mounting block 4, and the inner groove 303 is provided with a spring 1 304. A through hole 307 that penetrates from front to back is provided on one side away from the inner center of the mounting block 4, a mounting rod 308 is slidably connected inside the through hole 307, mounting holes 309 are provided on both the front and rear surfaces inside the mounting groove 2, and one end of the mounting rod 308 away from the inner center of the mounting block 4 is inserted into the mounting hole 309, a clamping block 311 is fixedly connected to one end of the mounting rod 308 close to the inner center of the mounting block 4, and the outer surface of the clamping block 311 is in contact with the side of the extrusion plate 305 away from the inner center of the mounting block 4, the outer surface of the mounting rod 308 is located inside the through hole 307 and is sleeved with a second spring 310, the second spring 310 One end close to the inner center of the mounting block 4 is fixedly connected to the outer surface of the mounting rod 308, and the end of the spring 2 310 away from the inner center of the mounting block 4 is fixedly connected to the inner wall of the through hole 307; when working, the pull rod 302 is first moved so that the pull rod 302 drives the extrusion plate 305 to slide inside the inner groove 303, and after the extrusion plate 305 slides, the slot 306 and the block 311 correspond to each other, and when the extrusion plate 305 does not move, the spring 1 304 limits it, and then after the block 311 corresponds to the slot 306, the extrusion plate 305 is disengaged from the extrusion of the block 311, and after the block 311 is disengaged from the extrusion, the spring 2 310 that was originally extruded has a reverse reaction. The locking block 311 is then clamped in the card slot 306, and the end of the mounting rod 308 is moved out of the mounting hole 309 to disengage the mounting block 4. Then, the mounting block 4 is moved out so that the preload assembly 7 can be moved along with the mounting block 4 for disassembly. When installing again, the mounting block 4 is first inserted into the mounting slot 2, and the preload assembly 7 is installed between the main shaft 6. Then, the pull rod 302 is squeezed downward to move the extrusion plate 305, and the card block 311 inside the card block 311 is squeezed so that the mounting rod 308 is inserted into the mounting hole 309 to limit the mounting block 4, thereby making the mounting block 4 firmly installed.

[0035] The outer surface of the clamping block 311 and the inner wall of the clamping slot 306 are both arranged in an arc shape; during operation, the clamping block 311 and the clamping slot 306 are easily connected and disconnected.

[0036] The card block 311 is adapted to the card slot 306 ; during operation, the card block 311 can be engaged in the card slot 306 .

[0037] Embodiment 2

[0038] See also Figure 5 As shown, compared with Example 1, as another implementation of the utility model, one end of the pull rod 302 away from the inner center of the cylinder 1 passes through the side of the mounting block 4 away from the inner center of the cylinder 1, and is fixedly connected with a handle 312; when working, the handle 312 facilitates the movement of the pull rod 302 and the disassembly and installation of the mounting block 4.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A high-speed precision spindle pre-tightening structure, comprising a cylinder (1); Features: The cylinder (1) is provided with left and right through holes (5) at the center of the left and right sides, and a main shaft (6) is rotatably connected between the two through holes (5) via a bearing; The cylinder (1) is provided with an installation groove (2) which penetrates from top to bottom on both the upper and lower surfaces at the center of the cylinder (1), a installation block (4) is installed inside the installation groove (2), and an installation component (3) is arranged between the inside of the installation block (4) and the inside of the installation groove (2); A pre-tightening assembly (7) is provided between the mounting block (4) and the main shaft (6); The mounting assembly (3) comprises two inner grooves (303), and the two inner grooves (303) are respectively arranged at the front and rear of the mounting block (4); an extrusion plate (305) is slidably connected inside the inner groove (303); a through groove (301) penetrating from top to bottom is arranged at the center of the inner upper surface of the inner groove (303); a spring 1 (304) is fixedly connected between the top of the extrusion plate (305) and the inner upper surface of the inner groove (303); a pull rod (302) is fixedly connected at the center of the top of the extrusion plate (305), and the top end of the pull rod (302) penetrates the spring 1 (304) and the through groove (301); a slot (306) is arranged on the side of the extrusion plate (305) away from the inner center of the mounting block (4); a through hole (307) penetrating from front to back is arranged on the side of the inner groove (303) away from the inner center of the mounting block (4); the through hole (3 07) is slidably connected with a mounting rod (308) inside, the front and rear surfaces inside the mounting groove (2) are both provided with mounting holes (309), and the end of the mounting rod (308) away from the center of the mounting block (4) is inserted into the mounting hole (309), and the end of the mounting rod (308) close to the center of the mounting block (4) is fixedly connected with a clamping block (311), and the outer surface of the clamping block (311) is in contact with the side of the extrusion plate (305) away from the center of the mounting block (4), the outer surface of the mounting rod (308) is located inside the through hole (307) and is sleeved with a spring 2 (310), the end of the spring 2 (310) close to the center of the mounting block (4) is fixedly connected to the outer surface of the mounting rod (308), and the end of the spring 2 (310) away from the center of the mounting block (4) is fixedly connected to the inner wall of the through hole (307).

2. A high-speed precision spindle preload structure according to claim 1, characterized in that: The preload assembly (7) comprises a connecting rod (704), and one end of the connecting rod (704) away from the inner center of the cylinder (1) is fixedly connected to the side of the mounting block (4) close to the inner center of the cylinder (1), a sliding groove (705) is provided inside the connecting rod (704), and the interior of the sliding groove (705) is communicated with the interior of the cylinder (1), a fixing ring (706) is fixedly connected inside the sliding groove (705), and a sliding ring (708) is slidably connected inside the sliding groove (705), and a sliding ring (708) is placed between the sliding ring (708) and the fixing ring (706). There is a spring three (707), and a pre-tightening rod (703) is fixedly connected inside the sliding ring (708), and the end of the pre-tightening rod (703) away from the inner center of the cylinder (1) passes through the spring three (707) and the fixed ring (706), and the end of the pre-tightening rod (703) close to the inner center of the cylinder (1) is fixedly connected to a guide block (702), and a circle of continuous guide grooves (701) are provided at the center of the outer surface of the main shaft (6), and the guide block (702) is inserted into the guide groove (701) and is movably connected to the guide groove (701).

3. The high-speed precision spindle preload structure according to claim 2, characterized in that: The outer surface of the guide block (702) and the inner wall of the guide groove (701) are both arranged in an arc shape.

4. A high-speed precision spindle preload structure according to claim 3, characterized in that: The outer surface of the clamping block (311) and the inner side wall of the clamping slot (306) are both arranged in an arc shape.

5. The high-speed precision spindle preload structure according to claim 4, characterized in that: The card block (311) is adapted to the card slot (306).

6. A high-speed precision spindle preload structure according to claim 5, characterized in that: One end of the pull rod (302) away from the inner center of the cylinder (1) passes through a side of the mounting block (4) away from the inner center of the cylinder (1) and is fixedly connected to a handle (312).

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