A grinding wheel dresser spindle

Abstract

This application discloses a grinding wheel dresser spindle, including a rotating shaft unit at the left end and an unloading unit at the right end. An annular positioning groove is provided in the middle of the housing, and a spring sleeve is installed there. The rotating shaft is fitted inside the cavity of the housing, and bearing assembly I and bearing assembly II are installed on the outer surfaces of both ends of the rotating shaft. A spacer is provided between bearing assembly I and bearing assembly II. An externally threaded nut I is installed on the right section of the rotating shaft. An end cover is installed at the left end of the housing; a recessed structure is provided at the left end of the end cover to install a skeleton oil seal. A dust cover is fitted on the outside of the end cover. This grinding wheel dresser spindle, by using an annular positioning groove inside the housing to fit and install a fixed spring sleeve, adjusts the bearing preload and maintains the stability of the spindle's rigidity. The unloading unit reduces the bending effect of radial force on the rotating shaft, improving the rotational accuracy of the shaft. The multi-layered sealing dustproof structure effectively prevents dust and wastewater from entering the spindle, extending its service life.

Description

Technical Field

[0001] This utility model belongs to the field of grinding technology and relates to a grinding wheel dresser spindle. Background Technology

[0002] In general, the rotation of the mechanical spindle of a grinding machine is transmitted via a belt. The motor drives the belt, which in turn drives the pulley of the spindle. The pulley directly rotates the spindle, which experiences both torque and radial bending force. The radial bending force affects the spindle's rotational accuracy, which in turn affects the rotational accuracy of the grinding wheel or workpiece driven by the spindle, especially in the design and machining of high-precision grinding machines. Some spindles have unloading devices; if the sealing of these devices is inadequate, the overall reliability of the spindle will be compromised. Summary of the Invention

[0003] To address the shortcomings and problems of existing spindle structures, a grinding wheel dresser spindle is provided. This spindle consists of two parts: a rotating shaft unit and an unloading unit. The rotating shaft unit employs a spring sleeve structure combining an elastic expansion sleeve and a spring seat. The tension of the spring increases the preload of the bearing, thereby improving the rigidity of the spindle. At the same time, the unloading unit reduces the bending effect of radial force on the rotating shaft, improving the rotational accuracy of the shaft. The spindle structure is simple and highly reliable.

[0004] The technical solution adopted by this utility model is as follows: A grinding wheel dresser spindle includes a rotating shaft unit at the left end and an unloading unit at the right end. The bearing seat of the unloading unit is fixed to the right end of the housing of the rotating shaft unit. The rotating shaft unit includes a rotating shaft, a dust cover, an end cover, bearing assembly I, an inner spacer, a housing, a spring sleeve, a spring, a thrust pad, bearing assembly II, and a nut I. The housing is configured as a hollow stepped structure, with an annular positioning groove in the middle of the housing, and a spring sleeve is installed in the annular positioning groove. The rotating shaft is fitted into the internal cavity of the housing. Bearing assembly I and bearing assembly II are installed on the outer surfaces of both ends of the rotating shaft, and bearing assembly I and bearing assembly II are fitted into the inner surface of the housing cavity. Further, a spacer is provided between bearing assembly I and bearing assembly II. Further, the right section of the rotating shaft is provided with an external thread structure to install nut I. The end cover is installed at the left end of the housing. Further, the left end of the end cover is provided with an inwardly recessed structure to install a skeleton oil seal. The dust cover is fitted onto the outside of the end cover.

[0005] Furthermore, a shoulder structure is provided at the left end of the rotating shaft.

[0006] Furthermore, the right end of the rotating shaft is provided with evenly distributed shaft holes, and the left end of the adapted rubber pin is installed in the shaft holes.

[0007] Furthermore, the hollow structure of the shell is configured as a stepped cavity with the left side larger than the right side, where bearing assembly I and bearing assembly II are respectively installed.

[0008] Furthermore, the left end of the spring sleeve is provided with a thin-walled structure, and an annular boss structure is provided on the outer surface of the thin-walled structure at the left end. The axial dimension of the annular boss is smaller than the width of the annular groove on the inner wall of the shell. Furthermore, the right end of the boss of the spring sleeve is provided with an arc transition. Furthermore, the circumference of the spring sleeve is provided with evenly distributed and penetrating radial through holes, and a rectangular groove is provided from the circular hole of the spring sleeve to the left end face.

[0009] Furthermore, the right end of the spring sleeve is provided with evenly distributed axial holes, and a matching spring is installed in the axial holes.

[0010] Furthermore, the unloading unit includes a bearing housing, bearing assembly III, a pulley, nut II, a pressure cap, and a rubber pin. The unloading unit has a bearing housing inside, a pulley outside, and a rotating bearing assembly III in the middle. The bearing housing has a hollow structure inside, and the size of the hollow structure is adapted to the outer diameter of the right section of the rotating shaft. The right section of the rotating shaft can pass through the internal cavity of the bearing housing. The bearing housing has a multi-step structure outside, with the bearing assembly III adapted to be installed in the middle section. The right end of the bearing housing has an external thread structure adapted to be installed with nut II. The pulley is installed on the outer surface of the bearing assembly III.

[0011] Furthermore, the left end of the pulley is provided with a concave stepped structure, which is fitted onto the outer surface of the bearing housing.

[0012] Furthermore, a mounting cap is provided at the right end of the pulley.

[0013] Furthermore, the left end of the pressure cap is provided with an axial circular hole that matches the axial circular hole at the right end of the rotating shaft, and the right end of the rubber pin is fitted into the circular hole.

[0014] The beneficial effects of this utility model are as follows: 1. The spindle of this grinding wheel dresser is simple to install and has a stable and reliable structure because it is fitted with an annular positioning groove in the cavity inside the housing to accommodate the fixing spring sleeve. By adjusting the bearing preload, the spindle maintains a certain load state during operation, ensuring the stability of the spindle's rigidity and improving its reliability. 2. The spindle of this grinding wheel dresser reduces the bending effect of radial force on the shaft through the action of the unloading unit, improving the rotational accuracy of the shaft. 3. The spindle of this grinding wheel dresser is equipped with a multi-layer sealing and dustproof structure, effectively preventing dust and sewage from entering the spindle and extending its service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the grinding wheel dresser spindle.

[0016] Figure 2 This is a schematic diagram of the spindle structure of a grinding wheel dresser.

[0017] Figure 3 This is a schematic diagram of the housing structure of the grinding wheel dresser spindle.

[0018] Figure 4 This is a schematic diagram of the spring sleeve structure of the grinding wheel dresser spindle.

[0019] Figure 5 This is a schematic diagram of the bearing housing structure of the spindle of a grinding wheel dresser.

[0020] The attached diagram is labeled as follows: 100-shaft, 101-shoulder, 102-shaft hole; 200-skeletal oil seal, 300-dust cover, 400-end cover, 500-bearing assembly I, 600-spacer, 700-housing, 701-positioning groove, 800-spring sleeve, 801-rectangular groove, 802-radial through hole, 803-axial hole, 900-spring, 1000-thrust pad, 1100-bearing assembly II, 1200-nut I, 1300-bearing seat, 1400-bearing assembly III, 1500-pulley, 1600-nut II, 1700-pressure cover, 1800-rubber pin. Detailed Implementation

[0021] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to examples and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0022] In the description of this utility model, it should be understood that the terms "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] It should be noted in advance that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, a direct connection, or a detachable connection. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0024] The following is combined Figure 1-5 The present invention will be described in detail through specific embodiments.

[0025] like Figure 1As shown, the spindle of the grinding wheel dresser of this utility model consists of two parts: a rotating shaft unit at the left end and a unloading unit at the right end. The bearing seat 1300 of the unloading unit is fixed to the right end of the housing 700 of the rotating shaft unit. The rotating shaft unit is the basic component unit, which supports the rotation of the rotating shaft 100 through the bearing groups installed at both ends inside the housing 700. The function of the unloading unit at the right end is to transfer and unload the radial force of the transmission belt on the rotating shaft 100 in the rotating shaft unit, thereby improving the rotation accuracy.

[0026] The rotating shaft unit includes a rotating shaft 100, a dust cover 300, an end cover 400, a bearing assembly I 500, a spacer 600, a housing 700, a spring sleeve 800, a spring 900, a thrust pad 1000, a bearing assembly II 1100, and a nut 11200. The housing 700 is a hollow stepped structure with an annular positioning groove 701 in the middle. The spring sleeve 800 is installed in the annular positioning groove 701 and serves to axially fix the spring sleeve 800. The rotating shaft 100 is fitted into the internal cavity of the housing 700. Bearing assemblies I 500 and II 1100 are installed on the outer surfaces of both ends of the rotating shaft 100, and the bearing assemblies I 500 and II 1100 are fitted into the inner surface of the cavity of the housing 700. The 1100 supports the rotating shaft 100; a spacer 600 is further provided between bearing assembly I 500 and bearing assembly II 1100 to axially position the distance between them; further, an externally threaded nut I 1200 is provided on the right section of the rotating shaft 100 to axially fix the bearing assembly I 500, bearing assembly II 1100, and spacer 600 by screwing in the nut I 1200; the end cover 400 is installed on the left end of the housing 700 to axially fix the outer ring of bearing assembly I 500; further, a concave structure is provided on the left end of the end cover 400 to install a skeleton oil seal 200 for dust prevention; the dust cover 300 is fitted on the outside of the end cover 400 to prevent dust and sewage from entering the spindle.

[0027] Furthermore, such as Figure 2 As shown, the left end of the rotating shaft 100 is provided with a shoulder 101 structure, and the right side of the shoulder 101 is equipped with a bearing assembly I500, which serves to fix the bearing assembly I500 axially; furthermore, the right end of the rotating shaft 100 is provided with evenly distributed shaft holes 102, and the shaft holes 102 are equipped with matching rubber pins 1800 to drive the rotating shaft 100 to rotate.

[0028] Furthermore, such as Figure 3 As shown, the hollow structure of the housing 700 is configured as a stepped cavity with the left side larger than the right side, and bearing assembly I 500 and bearing assembly II 1100 are installed thereon.

[0029] Furthermore, such as Figure 4As shown, the left end of the spring sleeve 800 has a thin-walled structure, and an annular boss structure is provided on the outer surface of the thin-walled structure at the left end. The axial dimension of the annular boss is smaller than the width of the annular groove on the inner wall of the housing 700. The right end of the boss of the spring sleeve 800 has an arc transition to facilitate the removal of the spring sleeve 800 from the positioning groove 701. Evenly distributed through radial holes 802 are provided around the circumference of the spring sleeve 800. A rectangular groove 801 is provided from the radial holes 802 to the left end face of the spring sleeve 800. The thin-walled structure and the slotted radial holes 802 give the left end of the spring sleeve 800 greater elasticity. The spring sleeve 800 is installed on the inner wall of the housing 700, allowing for compression of the spring sleeve 800. The boss at the left end enters the inner wall of the housing 700. When it reaches the annular positioning groove 701, due to the elastic tension, the boss of the spring sleeve 800 enters the annular positioning groove 701 and fits tightly with the left end face of the groove, thus playing a role in axial positioning. Furthermore, the right end of the spring sleeve 800 is provided with evenly distributed axial holes 803. A matching spring 900 is installed in the axial holes 803. When the nut I 1200 is screwed in to tighten the bearing assembly, the thrust pad 1000 compresses the spring 900, thereby generating a certain reverse axial force. The force reduces the bearing clearance of bearing assembly I 500 and bearing assembly II 1100, thus playing a role in preloading.

[0030] The unloading unit includes a bearing housing 1300, a bearing assembly III 1400, a pulley 1500, a nut II 1600, a pressure cap 1700, and a rubber pin 1800. The unloading unit has the bearing housing 1300 inside, the pulley 1500 outside, and the rotating bearing assembly III 1400 in the middle. The pulley 1500 rotates around the bearing housing 1300 via the bearing assembly III 1400. The bearing housing 1300 has a hollow structure inside, the dimensions of which are adapted to the outer diameter of the right section of the rotating shaft 100. The right section of the rotating shaft 100... It can pass through the internal cavity of the bearing housing 1300; the bearing housing 1300 is externally configured with a multi-step structure, with the bearing assembly III 1400 adapted to be installed in the middle section, and an external thread structure is provided at the right end of the bearing 1300 to adapt to and install the nut II 1600, and the bearing assembly III 1400 is fixed by the nut II 1600; the pulley 1500 is installed on the outer surface of the bearing assembly III 1400, and the pulley 1500 is driven to rotate by the external belt; a pressure cap 1700 is provided at the right end of the pulley 1500 to provide a sealing function.

[0031] Furthermore, the left end of the pulley 1500 is provided with a concave step structure, which is fitted onto the outer surface of the bearing seat 1300 to prevent dust.

[0032] Furthermore, the left end of the pressure cap 1700 is provided with an axial circular hole that matches the axial hole at the right end of the rotating shaft 100. A rubber pin 1800 is fitted into the circular hole. The rotation of the pulley 1500 drives the pressure cap 1700 to rotate synchronously, and then the installed rubber pin 1800 drives the rotating shaft 100 to rotate.

[0033] Working principle: The spindle of the grinding wheel dresser is configured with a rotating shaft unit and an unloading unit. The rotating shaft 100 at the left end is the basic working part. The rotating shaft 100 rotates around the axis through the bearing assembly I 500 and bearing assembly II 1100 at both ends. The elastic tension of the spring 900 installed at the right end of the spring sleeve 800 generates a certain preload on the bearing assembly I 500 and bearing assembly II 1100, reducing the bearing clearance and improving the rigidity of the spindle. The unloading unit at the right end drives the unloading part to rotate the pulley 1500 through the external belt, which in turn drives the pressure cover 1700 to rotate synchronously. Then, the rubber pin 1800 installed between the pressure cover 1700 and the shaft hole 102 of the rotating shaft 100 drives the rotating shaft 100 to rotate. While the belt transmits the rotational torque, it generates a certain radial force. The radial force is transmitted through the pulley 1500, the internal bearing assembly III 1400 and the bearing seat 1300 to the housing 700 fixed to the bearing seat 1300, which plays the role of unloading.

[0034] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent applications. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of this utility model shall fall within the scope of the technical solution of this utility model.

[0035] To facilitate a better understanding by those skilled in the art of the improvements made by this invention compared to the prior art, some of the accompanying drawings and descriptions have been simplified, and for clarity, some other elements have been omitted from this application. Those skilled in the art should realize that these omitted elements also constitute the content of this invention.

Claims

1. A grinding wheel dresser spindle, comprising a rotating shaft unit at the left end and an unloading unit at the right end, characterized in that: The bearing seat of the unloading unit is fixed to the right end of the housing of the rotating shaft unit; the rotating shaft unit includes a rotating shaft, a dust cover, an end cover, bearing assembly I, an inner spacer, a housing, a spring sleeve, a spring, a thrust pad, bearing assembly II, and nut I; the housing is configured as a hollow stepped structure, with an annular positioning groove in the middle of the housing, and a spring sleeve is installed in the annular positioning groove; the rotating shaft is fitted into the internal cavity of the housing, and bearing assembly I and bearing assembly II are installed on the outer surfaces of both ends of the rotating shaft, and bearing assembly I and bearing assembly II are fitted into the inner surface of the housing cavity; further, a spacer is provided between bearing assembly I and bearing assembly II; further, the right section of the rotating shaft is provided with an external thread structure to install nut I; the end cover is installed at the left end of the housing; further, the left end of the end cover is provided with an inwardly recessed structure to install a skeleton oil seal; the dust cover is fitted onto the outside of the end cover.

2. The grinding wheel dresser spindle according to claim 1, characterized in that: A shoulder structure is provided at the left end of the rotating shaft.

3. A grinding wheel dresser spindle according to claim 1 or 2, characterized in that: The right end of the rotating shaft is provided with evenly distributed shaft holes, and the left end of the fitting rubber pin is installed in the shaft holes.

4. The grinding wheel dresser spindle according to claim 1, characterized in that: The hollow structure of the shell is configured as a stepped cavity with the left side larger than the right side, and bearing assembly I and bearing assembly II are installed thereon.

5. The grinding wheel dresser spindle according to claim 1, characterized in that: The left end of the spring sleeve is provided with a thin-walled structure, and an annular boss structure is provided on the outer surface of the thin-walled structure at the left end. The axial dimension of the annular boss is smaller than the width of the annular groove on the inner wall of the shell. Furthermore, the right end of the boss of the spring sleeve is provided with an arc transition. Furthermore, the circumference of the spring sleeve is provided with evenly distributed and continuous radial through holes, and a rectangular groove is provided from the circular hole of the spring sleeve to the left end face.

6. The grinding wheel dresser spindle according to claim 5, characterized in that: The right end of the spring sleeve is provided with evenly distributed axial holes, and a matching spring is installed in the axial holes.

7. The grinding wheel dresser spindle according to claim 1, characterized in that: The unloading unit includes a bearing housing, bearing assembly III, a pulley, nut II, a pressure cap, and a rubber pin. The bearing housing is located inside the unloading unit, the pulley is located outside, and the rotating bearing assembly III is located in the middle. The bearing housing has a hollow structure inside, and the size of the hollow structure is adapted to the outer diameter of the right section of the rotating shaft. The right section of the rotating shaft can pass through the internal cavity of the bearing housing. The bearing housing has a multi-step structure outside, with the bearing assembly III installed in the middle section. The right end of the bearing housing has an external thread structure adapted to install nut II. The pulley is installed on the outer surface of the bearing assembly III.

8. A grinding wheel dresser spindle according to claim 7, characterized in that: The left end of the pulley is provided with a concave stepped structure, which is fitted onto the outer surface of the bearing housing.

9. A grinding wheel dresser spindle according to claim 7 or 8, characterized in that: A mounting cap is provided at the right end of the pulley.

10. A grinding wheel dresser spindle according to claim 9, characterized in that: The left end of the pressure cap is provided with an axial circular hole that matches the axial circular hole at the right end of the rotating shaft, and the right end of the rubber pin is fitted into the circular hole.

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