Main shaft equipment suitable for inner circle grinding wheel shaft

Abstract

The utility model relates to main shaft equipment suitable for an inner circle grinding wheel shaft, which comprises a main shaft base, a core shaft component is arranged in the main shaft base in a penetrating manner, a main oil-gas lubricating device is mounted at one end of the core shaft component, and an auxiliary oil-gas lubricating device is mounted at the other end of the core shaft component. A shaft end limiting device is installed on the main shaft base and located on the outer side of the main oil-gas lubricating device, a transmission device is installed on the main shaft base and located on the outer side of the auxiliary oil-gas lubricating device, and a self-pre-tightening device is further installed at the combining end of the auxiliary oil-gas lubricating device and the mandrel assembly. Therefore, in the operation period, the main oil-gas lubricating device and the auxiliary oil-gas lubricating device are each provided with a corresponding spacer ring to form a lubricating oil way in a matched mode, sufficient lubrication can be achieved, and the stability and the heat dissipation requirement under high-rotating-speed operation are guaranteed. The taper hole belt pulley is of an easy-to-separate structure and can be fully matched with the contact conical surface of the mandrel assembly, and stable matching during operation is ensured while the requirement for convenient installation is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a main shaft equipment, especially a main shaft equipment suitable for inner circle grinding wheel shaft. BACKGROUND

[0002] For the existing grinding processing equipment, the inner circle grinding wheel shaft is often used for driving operation, and the rigidity and rotating speed of the main shaft greatly influence the precision of the grinding parts. At present, the conventional grinding wheel shaft is mainly a mechanical main shaft, which runs in the mode of belt driving, and the rotating speed is low and the vibration is large. Therefore, the surface quality and surface precision of the grinding parts cannot meet the higher requirements. Moreover, the necessary lubrication is lacked during operation, which leads to a high running temperature and easily causes the main shaft deformation, thereby reducing the service life. At the same time, the main shaft rigidity under the existing structure layout is low, and the grinding efficiency and grinding quality cannot be improved.

[0003] In view of the above defects, the present design person actively researches and innovates to create a main shaft equipment suitable for inner circle grinding wheel shaft, so that it has more industrial utilization value. INVENTION CONTENTS

[0004] To solve the above technical problems, the purpose of the utility model is to provide a main shaft equipment suitable for inner circle grinding wheel shaft.

[0005] The main shaft equipment suitable for inner circle grinding wheel shaft of the utility model comprises a main shaft base, wherein: a mandrel assembly is arranged in the main shaft base, one end of the mandrel assembly is provided with a main oil gas lubricating device, the other end of the mandrel assembly is provided with a secondary oil gas lubricating device, an axle end limiting device is arranged on the outer side of the main oil gas lubricating device of the main shaft base, a transmission device is arranged on the outer side of the secondary oil gas lubricating device of the main shaft base, and a self-preloading device is further arranged on the combined end of the secondary oil gas lubricating device and the mandrel assembly.

[0006] Further, the main shaft equipment suitable for inner circle grinding wheel shaft, wherein the main oil gas lubricating device comprises two precise angular contact bearings arranged in series in a back-to-back mode, which respectively form a first bearing assembly and a second bearing assembly, the first bearing assembly and the second bearing assembly are sleeved on one end of the mandrel assembly,

[0007] a main bearing inner spacer ring is arranged between the first bearing assembly and the second bearing assembly, a first bearing oil spray ring is sleeved on the outer side of the main bearing inner spacer ring,

[0008] a load boss is arranged at the end of the mandrel assembly of the main oil gas lubricating device, and a second bearing oil spray ring is sleeved on the load boss.

[0009] Further, the main shaft device for the inner circle grinding wheel shaft, wherein the auxiliary oil gas lubricating device comprises two series back-to-back distributed precision angular contact bearings, respectively constituting a third bearing assembly and a fourth bearing assembly, the third bearing assembly and the fourth bearing assembly are sleeved on the other end of the mandrel assembly,

[0010] The third bearing assembly and the fourth bearing assembly are provided with a secondary bearing inner spacer ring, and the secondary bearing inner spacer ring is sleeved with a third bearing oil ring,

[0011] The fourth bearing oil ring is connected to the mandrel assembly.

[0012] Further, the main shaft device for the inner circle grinding wheel shaft, wherein the shaft end limiting device comprises a sealing gasket in contact with the main oil gas lubricating device, the sealing gasket is provided with a gland, the gland is connected with a locking nut, and the locking nut is connected with the mandrel assembly.

[0013] Further, the main shaft device for the inner circle grinding wheel shaft, wherein the transmission device comprises a bearing spacer ring sleeved on the mandrel assembly outside the auxiliary oil gas lubricating device, the bearing spacer ring is connected with an end cover, the end cover is connected with the main shaft base through the mandrel assembly, the mandrel assembly is sleeved with a taper hole pulley, and the taper hole pulley is connected with the mandrel assembly through a precision screw.

[0014] Further, the main shaft device for the inner circle grinding wheel shaft, wherein the self-preloading device comprises a spring seat, the mandrel assembly is provided with a load boss at the front end of the main oil gas lubricating device, the load boss is sleeved with the spring seat, the spring seat is provided with a pre-tightening spring, and the pre-tightening spring is in contact with the auxiliary oil gas lubricating device.

[0015] Further, the main shaft device for the inner circle grinding wheel shaft, wherein the mandrel assembly is provided with a contact taper surface at the front end, and the auxiliary oil gas lubricating device and the transmission device are sleeved on the contact taper surface.

[0016] Further, the main shaft device for the inner circle grinding wheel shaft, wherein the bottom of the main shaft base is provided with wings extending to both ends, constituting a mounting base, and the mounting base is provided with a plurality of positioning mechanisms.

[0017] Further, the main shaft device for the inner circle grinding wheel shaft, wherein the positioning mechanism is an elongated circular groove, and the elongated circular groove is provided with a positioning bolt.

[0018] By the above scheme, the main shaft device for the inner circle grinding wheel shaft has at least the following advantages:

[0019] 1. During operation, both the main oil-air lubrication device and the auxiliary oil-air lubrication device have a corresponding spacer ring to cooperate in forming the lubrication circuit, which can fully lubricate and ensure stability and heat dissipation under high speed operation.

[0020] 2. The tapered pulley features an easily separable structure and can fully engage with the contact tapered surface of the spindle assembly, ensuring convenient installation while maintaining stable operation. Furthermore, in the event of wear on the tapered pulley, only the pulley itself needs to be replaced, eliminating the need to replace the spindle assembly, thus simplifying operation and maintenance and reducing costs.

[0021] 3. It is equipped with an independent self-pre-tightening device, which can ensure that there is no abnormal fit clearance during operation and ensure the stable operation of the mandrel assembly for a long time.

[0022] 4. The overall structure is simple, and the vibration is small and almost negligible under high-speed operation, which improves the precision and processing efficiency of grinding.

[0023] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0024] Fig. 1 This is a schematic diagram of the external structure of a spindle device suitable for internal grinding wheel shafts.

[0025] Fig. 2 This is a cross-sectional structural diagram of a spindle device suitable for internal grinding wheel shafts.

[0026] The meanings of the labels in the figures are as follows.

[0027] 1. Spindle assembly 2. Locking nut

[0028] 3. Gland 4. Sealing gasket

[0029] 5 First bearing assembly 6 Main bearing inner spacer

[0030] 7 First bearing oil injection ring 8 Second bearing assembly

[0031] 9 Second bearing oil injection ring 10 Main spindle base

[0032] 11 Spring seat 12 Preload spring

[0033] 13 Fourth bearing oil injection ring 14 Third bearing assembly

[0034] 15. Inner spacer ring of secondary bearing; 16. Oil injection ring of third bearing.

[0035] 17 fourth bearing assembly 18 end cover

[0036] 19 bearing spacer ring 20 taper hole pulley

[0037] 21 precision screw 22 wing

[0038] 23 long circular groove DETAILED DESCRIPTION

[0039] The specific embodiments of the utility model will be described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0040] As Figs. 1-2 The main shaft device suitable for the inner grinding wheel shaft comprises a main shaft base 10, which is different in that a mandrel assembly 1 is arranged in the main shaft base 10 and used for realizing transmission. Meanwhile, in order to realize effective oil-gas lubrication to cooperate with subsequent belt transmission and improve the final rotating speed, a main oil-gas lubricating device is arranged at one end of the mandrel assembly 1, and a secondary oil-gas lubricating device is arranged at the other end of the mandrel assembly 1. In addition, in order to avoid unnecessary horizontal displacement of the main oil-gas lubricating device during use, an axial end limiting device is arranged outside the main oil-gas lubricating device on the main shaft base 10. During implementation, in order to meet transmission butt joint and realize convenient installation and maintenance, a transmission device is arranged outside the secondary oil-gas lubricating device on the main shaft base 10. Furthermore, considering that the mandrel assembly 1 will bring certain displacement or vibration during high-speed rotation, in order to reduce the improper gap possibly caused by such movement and realize better adhesion, the main oil-gas lubricating device and the secondary oil-gas lubricating device are always kept in a better position and lubrication state, and a self-preloading device is further arranged at the combined end of the secondary oil-gas lubricating device and the mandrel assembly 1. Such a structure can also appropriately limit the longitudinal displacement of the mandrel assembly 1.

[0041] In combination with a preferred embodiment of the utility model, the main oil-gas lubricating device comprises two precision angular contact bearings arranged in a back-to-back series and used for respectively forming a first bearing assembly 5 and a second bearing assembly 8. Specifically, the first bearing assembly 5 and the second bearing assembly 8 are arranged at one end of the mandrel assembly 1. Meanwhile, a main bearing inner spacer ring 6 is arranged between the first bearing assembly 5 and the second bearing assembly 8, and a first bearing oil spray ring 7 is arranged outside the main bearing inner spacer ring 6. In addition, a load bearing boss is arranged at the end of the mandrel assembly 1, and a second bearing oil spray ring 9 is arranged outside the load bearing boss. In this way, oil-gas lubrication can be realized while avoiding leakage or abnormal overflow.

[0042] Further, the auxiliary oil-gas lubricating device also comprises two precision angular contact bearings arranged in series in a back-to-back manner. Specifically, the two precision angular contact bearings form a third bearing assembly 14 and a fourth bearing assembly 17, which are arranged at the other end of the mandrel assembly 1. Meanwhile, in order to avoid oil-gas overflow during oil-gas lubrication, a bearing inner spacer ring 15 is arranged between the third bearing assembly 14 and the fourth bearing assembly 17. In addition, in consideration of the need for sufficient lubrication during use, the bearing inner spacer ring 15 is sleeved with a third bearing oil spray ring 16, and the front end of the third bearing assembly 14 is provided with a fourth bearing oil spray ring 13, which is connected to the mandrel assembly 1.

[0043] During implementation, the utility model adopts four precision angular contact bearings, each of which is provided with an independent lubricating hole. The precision angular contact bearings can be selected from commercially available products or can be machined according to commercially available models, and thus will not be described here. In this way, each precision angular contact bearing can be fully lubricated during operation, and high-speed stable operation can be realized. Meanwhile, the heat generated by the precision angular contact bearings during operation can be dissipated outward through the lubricating gas, thereby achieving effective cooling and prolonging the service life of the entire spindle device.

[0044] In combination with actual implementation, in order to realize effective side end sealing and limiting without affecting the operation of the mandrel assembly 1, the shaft end limiting device comprises a sealing gasket 4 in contact with the main oil-gas lubricating device, which can prevent oil-gas overflow. In addition, the sealing gasket 4 is provided with a gland 3, the gland 3 is connected with a lock nut 2, and the lock nut 2 is connected with the mandrel assembly 1. In this way, the effective limiting of the side end can be realized by the presence of the gland 3.

[0045] Meanwhile, in order to meet the effective driving transmission, the transmission device comprises a bearing spacer ring 19 arranged on the mandrel assembly 1 outside the auxiliary oil-gas lubricating device, the bearing spacer ring 19 is connected with an end cover 18, and the end cover 18 is connected with the spindle base 10 through the mandrel assembly 1. In addition, the mandrel assembly 1 is provided with a tapered hole pulley 20, which is convenient for subsequent connection with a belt transmission device for driving transmission. In consideration of the need for stable combination of the tapered hole pulley 20, the tapered hole pulley 20 is connected with the mandrel assembly 1 through a precision screw 21. After assembly, there is a gap between one side of the tapered hole pulley 20 and the end cover 18, and no motion interference occurs.

[0046] Further, the self-preloading device comprises a spring seat 11, and the core shaft assembly 1 is located at the front end of the main oil gas lubricating device and is provided with a bearing boss, and the spring seat 11 is sleeved on the bearing boss. Meanwhile, the spring seat 11 is provided with a pre-tightening spring 12, and the pre-tightening spring 12 is in contact with the third bearing assembly 14 of the auxiliary oil gas lubricating device. In this way, the auxiliary oil gas lubricating device can be timely returned to the center when longitudinal vibration occurs, so as to avoid the deviation of the operation of the core shaft assembly 1 and improve the overall operation stability. In other words, the pre-tightening spring 12 can be used to realize spring pre-tightening, so as to improve the grinding efficiency and grinding quality of the core shaft assembly 1.

[0047] In order to meet the effective layered stacking arrangement between various devices, and to increase the rigidity of the core shaft assembly 1, the front end of the core shaft assembly 1 is provided with a contact cone surface, and the auxiliary oil gas lubricating device and the transmission device are respectively sleeved on the contact cone surface.

[0048] In order to realize stable installation and docking with the existing grinding wheel equipment, the bottom of the main shaft base 10 is provided with wings 22 extending to both ends, forming an installation base, and a plurality of positioning mechanisms are distributed on the installation base. Specifically, the positioning mechanism is a long circular groove 23, and the long circular groove 23 is provided with a positioning bolt.

[0049] Through the above description and in combination with the drawings, it can be seen that after adopting the utility model, the following advantages are obtained:

[0050] 1. During operation, the main oil gas lubricating device and the auxiliary oil gas lubricating device have a corresponding spacer ring to cooperate to form a lubricating oil path, which can fully lubricate and ensure the stability and heat dissipation needs under high speed operation.

[0051] 2. The taper hole pulley is a detachable structure, and can fully cooperate with the contact cone surface of the core shaft assembly, so as to meet the convenient installation and ensure the stable cooperation during operation. At the same time, in the case of wear of the taper hole pulley, only the taper hole pulley itself needs to be replaced, without the need to replace the core shaft assembly, so as to realize convenient operation and maintenance and reduce maintenance cost.

[0052] 3. The independent self-preloading device can meet the abnormal cooperation gap during operation and meet the long-term stable operation of the core shaft assembly.

[0053] 4. The overall structure is simple, the vibration is small during high-speed operation, and the precision and processing efficiency of grinding are improved.

[0054] In addition, the indicated direction or position relationship described in the utility model is the direction or position relationship shown based on the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or structure must have a specific direction or be operated in a specific direction, so it cannot be understood as a limitation on the utility model.

[0055] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model, and it should be pointed out that, for ordinary skilled in the art, under the premise of not departing from the technical principle of the utility model, a number of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection scope of the utility model.

Claims

1. A spindle device suitable for internal grinding wheel shafts, comprising a spindle base, characterized in that: A spindle assembly is installed in the spindle base. A main oil-air lubrication device is installed at one end of the spindle assembly, and a secondary oil-air lubrication device is installed at the other end of the spindle assembly. A shaft end limiting device is installed on the spindle base outside the main oil-air lubrication device. A transmission device is installed on the spindle base outside the secondary oil-air lubrication device. A self-pre-tightening device is also installed at the joint end between the secondary oil-air lubrication device and the spindle assembly. The main oil-air lubrication device includes two precision angular contact bearings arranged back-to-back in series, forming a first bearing assembly and a second bearing assembly, respectively. The first bearing assembly and the second bearing assembly are sleeved on one end of the spindle assembly. A main bearing inner spacer is provided between the first bearing assembly and the second bearing assembly. A first bearing oil injection ring is sleeved on the main bearing inner spacer. The spindle assembly has a bearing boss distributed at the end of the main oil-air lubrication device. A second bearing oil injection ring is sleeved on the bearing boss. The auxiliary oil-air lubrication device includes two precision angular contact bearings arranged back-to-back in series, forming a third bearing assembly and a fourth bearing assembly, respectively. The third bearing assembly and the fourth bearing assembly are sleeved on the other end of the spindle assembly. An inner spacer ring of the auxiliary bearing is provided between the third bearing assembly and the fourth bearing assembly. An oil injection ring of the third bearing is sleeved on the inner spacer ring of the auxiliary bearing. An oil injection ring of the fourth bearing is installed at the front end of the third bearing assembly. The oil injection ring of the fourth bearing is connected to the spindle assembly. The shaft end limiting device includes a sealing gasket that contacts the main oil and gas lubrication device. A pressure cap is installed on the sealing gasket, and a locking nut is connected to the pressure cap. The locking nut is also connected to the spindle assembly. The transmission device includes a bearing spacer sleeved on the spindle assembly located outside the auxiliary oil-gas lubrication device. An end cap is connected to the bearing spacer. The end cap passes through the spindle assembly and is connected to the main shaft base. A tapered hole pulley is sleeved on the spindle assembly. The tapered hole pulley is connected to the spindle assembly by a precision screw. The self-pre-tightening device includes a spring seat. The spindle assembly has a bearing boss distributed at the front end of the main oil-gas lubrication device. The bearing boss is fitted with a spring seat. A pre-tightening spring is installed in the spring seat. The pre-tightening spring is in contact with the auxiliary oil-gas lubrication device. The front end of the spindle assembly is provided with a contact cone surface. The auxiliary oil-gas lubrication device and the transmission device are respectively fitted on the contact cone surface. The bottom of the spindle base is provided with winglets extending to both ends to form a mounting base. Several positioning mechanisms are distributed on the mounting base. The positioning mechanism is an elongated groove, and a positioning bolt is provided in the elongated groove.

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