Hydraulic rotating spindle for machine tool

Abstract

The utility model discloses a hydraulic rotating main shaft for a machine tool, which relates to the technical field of machine tool accessories and comprises a shaft body mechanism, a front-back penetrating shaft core mechanism is arranged in an inner cavity of the shaft body mechanism, the shaft body mechanism comprises a main shaft body mechanism, and a first sealing cover is fixedly mounted on the front side of the main shaft body mechanism. A second sealing cover is fixedly installed on the rear side of the main shaft body mechanism, a second main shaft body is fixedly connected to the rear side of the second sealing cover, a threaded section is arranged on the outer wall of the second main shaft body, a first shaft core bearing is fixedly installed on the inner ring of the first sealing cover, and a second shaft core bearing is fixedly installed on the inner ring of the threaded section; the central spindle mechanism penetrates through the first central spindle bearing and the second central spindle bearing. According to the utility model, through the matching of the two damping mechanisms and the oil injection hole, lubricating oil injected from the oil injection hole can uniformly penetrate through the two damping mechanisms, so that the lubricating oil can reach all places in the main shaft body I, and the shaft core mechanism in the main shaft body I is fully lubricated.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool accessories, in particular to a hydraulic rotating spindle for a machine tool. Background Art

[0002] A machine tool is a machine that manufactures machines, also known as a machine tool or machine tool, and is usually referred to as a machine tool. The hydraulic rotary spindle is the machine tool spindle. The machine tool spindle refers to the axis that drives the workpiece or tool to rotate on the machine tool. It is usually composed of a spindle, bearings, and transmission parts. The spindle components are mainly used to support transmission parts such as gears and pulleys in the machine to transmit motion and torque. The existing technology has the following problems:

[0003] Chinese patent document CN217572110U discloses a hydraulic rotary spindle for machine tools, including a shaft assembly and a shaft core, a rotary cover 1 is installed on one side of the outer surface of the shaft assembly for mounting the spindle, and a rotary cover 2 is installed on the other side of the outer surface of the shaft assembly, a bearing 1 and a bearing 2 are installed on the inner surface of the shaft assembly from top to bottom, the shaft core is arranged on the inner surface of the bearing 2, a stabilizing assembly for assisting the shaft core to rotate stably is installed on the outer surface of the shaft core, and the stabilizing assembly includes a sleeve, a ball and a shock-absorbing rubber ring, and a ball is arranged on the inner surface of the sleeve. Compared with the existing ordinary hydraulic rotary spindle, the hydraulic rotary spindle for machine tools has a plurality of balls that rotate along the sleeve to assist the shaft core to rotate stably, and the micro vibration generated will be absorbed by the shock-absorbing rubber ring outside the sleeve to avoid the hydraulic rotary spindle from jumping, so that the hydraulic rotary spindle has an auxiliary stable rotation structure to improve the stability during rotation.

[0004] Although lubricating oil is added into the shaft body in the above-mentioned documents, the shaft body is separated by multiple layers of sleeves, balls and shock-absorbing rubber rings, and the shaft body is usually placed horizontally when in use. Therefore, after the lubricating oil is added into the shaft body from the rotary cover one and the rotary cover two, it is difficult for the lubricating oil to quickly reach the layer of sleeves, balls and shock-absorbing rubber rings farthest from the rotary cover one and the rotary cover two, resulting in uneven lubrication inside the shaft body. Utility Model Content

[0005] The utility model provides a hydraulic rotating spindle for a machine tool to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A hydraulic rotating spindle for a machine tool comprises a shaft body mechanism, the inner cavity of the shaft body mechanism is provided with a shaft core mechanism penetrating front and back, the shaft body mechanism comprises a spindle body mechanism, a sealing cover 1 is fixedly installed on the front side of the spindle body mechanism, a sealing cover 2 is fixedly installed on the rear side of the spindle body mechanism, a spindle body 2 is fixedly connected to the rear side of the sealing cover 2, a threaded section is provided on the outer wall of the spindle body 2, a shaft core bearing 1 is fixedly installed on the inner ring of the sealing cover 1, a shaft core bearing 2 is fixedly installed on the inner ring of the threaded section, the shaft core mechanism penetrates the shaft core bearing 1 and penetrates the shaft core bearing 2, the spindle body mechanism comprises a spindle body 1, and a shock absorbing mechanism is provided on the front and back of the inner ring of the spindle body 1.

[0008] A further improvement of the technical solution of the utility model is that an oil filling hole is opened at the bottom of the main shaft body 1, and the oil filling hole is connected with the inner cavity of the main shaft body 1 and is located between the two shock absorbing mechanisms. An inner recessed groove is opened at the bottom of the main shaft body 1, and the oil filling hole is located in the inner recessed groove.

[0009] A further improvement of the technical solution of the utility model lies in that: the two shock absorbing mechanisms both include a rubber ring, the outer wall of the rubber ring is fixedly connected to the inner ring of the main shaft body, the inner ring of the rubber ring is evenly fixedly installed with a plurality of buffer springs, a metal fixing ring is fixedly installed at one end of the plurality of buffer springs away from the rubber ring, a plurality of connecting rods are evenly fixedly installed at the inner ring of the metal fixing ring, a bearing is fixedly installed at one end of the plurality of connecting rods away from the metal fixing ring, and the shaft core mechanism runs through the bearing.

[0010] A further improvement of the technical solution of the utility model is that the shaft core mechanism includes a shaft core rod, a shaft head, and a positioning bolt. An extension rod is fixedly installed at the rear end of the shaft core rod, a slot is provided at the front end of the shaft head, the extension rod is engaged with the slot to merge the shaft core rod and the shaft head, and the positioning bolt penetrates into the inner cavity of the slot and is threadedly connected to the top of the extension rod.

[0011] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0012] 1. The utility model provides a hydraulic rotating spindle for a machine tool. Through the cooperation of two damping mechanisms and an oil filling hole, the lubricating oil injected from the oil filling hole can evenly pass through the two damping mechanisms, thereby reaching all places in the spindle body, and fully lubricating the shaft core mechanism in the spindle body.

[0013] 2. The utility model provides a hydraulic rotating spindle for a machine tool. Through the cooperation of a shaft core rod, a shaft head and a positioning bolt, the shaft core rod and the shaft head can be connected and fixed by tightening the positioning bolt, and the shaft core rod and the shaft head can be separated by removing the positioning bolt, and the shaft head or the shaft core rod can be removed separately for maintenance, making the maintenance of the shaft core mechanism more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall schematic diagram of the structure of the utility model;

[0015] Figure 2 It is an exploded schematic diagram of the shaft mechanism of the utility model structure;

[0016] Figure 3 A schematic cross-sectional view of a main shaft body of the utility model structure;

[0017] Figure 4 It is a schematic diagram of the shock absorbing mechanism of the utility model structure;

[0018] Figure 5 It is a schematic diagram of the decomposition of the shaft core mechanism of the utility model structure.

[0019] In the figure: 1, shaft mechanism; 11, main shaft mechanism; 111, main shaft body 1; 112, shock absorbing mechanism; 1121, rubber ring; 1122, buffer spring; 1123, metal fixing ring; 1124, connecting rod; 1125, bearing; 113, oil filling hole; 114, recessed groove; 12, sealing cover 1; 121, shaft core bearing 1; 13, sealing cover 2; 14, main shaft body 2; 141, shaft core bearing 2; 15, threaded section; 2, shaft core mechanism; 21, shaft core rod; 211, extension rod; 22, shaft head; 221, slot; 23, positioning bolt. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] like Figure 1 , Figure 2 , Figure 3As shown, the utility model provides a hydraulic rotary spindle for a machine tool, including a shaft body mechanism 1, the inner cavity of the shaft body mechanism 1 is provided with a shaft core mechanism 2 that penetrates front and back, the shaft body mechanism 1 includes a spindle body mechanism 11, a sealing cover 12 is fixedly installed on the front side of the spindle body mechanism 11, a sealing cover 2 13 is fixedly installed on the rear side of the spindle body mechanism 11, a spindle body 2 14 is fixedly connected to the rear side of the sealing cover 2 13, the outer wall of the spindle body 2 14 is provided with a threaded section 15, the inner ring of the sealing cover 12 is fixedly installed with a shaft core bearing 121, the threaded section 1 The inner ring of 5 is fixedly installed with a shaft core bearing 141, the shaft core mechanism 2 penetrates the shaft core bearing 121 and penetrates the shaft core bearing 141, the main shaft body mechanism 11 includes a main shaft body 111, and the inner ring of the main shaft body 111 is provided with a shock absorbing mechanism 112 at the front and rear, and the bottom of the main shaft body 111 is provided with an oil filling hole 113, and the oil filling hole 113 is connected with the inner cavity of the main shaft body 111 and is located between the two shock absorbing mechanisms 112, and the bottom of the main shaft body 111 is provided with an inner recessed groove 114, and the oil filling hole 113 is located in the inner recessed groove 114;

[0022] The shaft mechanism 1 is formed by installing the sealing cover 12 on the front side of the main shaft body 111, and the main shaft body 14 is installed on the rear side of the main shaft body mechanism 11 using the sealing cover 13, and the shaft core rod 21 included in the shaft core mechanism 2 is passed through the shaft core bearing 121 and the shaft core bearing 141 to complete the assembly of the shaft mechanism 1 and the shaft core mechanism 2. When it is necessary to add lubricating oil to the inner cavity of the main shaft body 111, it is injected through the oil filling hole 113. Since the oil filling hole 113 is located in the recessed groove 114, it does not affect the installation of the main shaft body 111.

[0023] like Figure 4 As shown, the two shock absorbing mechanisms 112 both include a rubber ring 1121, the outer wall of the rubber ring 1121 is fixedly connected to the inner ring of the main shaft body 111, the inner ring of the rubber ring 1121 is evenly fixedly installed with a plurality of buffer springs 1122, one end of the plurality of buffer springs 1122 away from the rubber ring 1121 is fixedly installed with a metal fixing ring 1123, the inner ring of the metal fixing ring 1123 is evenly fixedly installed with a plurality of connecting rods 1124, one end of the plurality of connecting rods 1124 away from the metal fixing ring 1123 is fixedly installed with a bearing 1125, and the shaft core mechanism 2 runs through the bearing 1125;

[0024] After the lubricating oil is injected into the main shaft body 111, it will pass through the gap between the buffer springs 1122 contained in the left and right shock-absorbing mechanisms 112 of the inner cavity of the main shaft body 111, and the bearing 1125 connected to the inner ring of the metal fixing ring 1123 by the connecting rod 1124, thereby flowing to the entire inner cavity of the main shaft body 111. At the same time, the vibration will be buffered by the extrusion between the buffer springs 1122 on the outer wall of the metal fixing ring 1123 and the inner ring of the rubber ring 1121, thereby ensuring the shock-absorbing effect while not affecting the flow of the lubricating oil to the entire inner cavity of the main shaft body 111.

[0025] like Figure 5 As shown, the shaft core mechanism 2 includes a shaft core rod 21, a shaft head 22, and a positioning bolt 23. The rear end of the shaft core rod 21 is fixedly mounted with an extension rod 211. The front end of the shaft head 22 is provided with a clamping groove 221. The extension rod 211 is clamped with the clamping groove 221 to merge the shaft core rod 21 and the shaft head 22. The positioning bolt 23 penetrates into the inner cavity of the clamping groove 221 and is threadedly connected with the top of the extension rod 211.

[0026] The shaft head 22 can be used to install accessories, and the positioning bolt 23 can be rotated to remove the extension rod 211 at the rear end of the shaft core rod 21 so that the groove 221 opened on the front side of the shaft head 22 can be pulled out, so that the shaft core rod 21 and the shaft head 22 can be disassembled, which is convenient for the separate maintenance of the shaft core rod 21 or the shaft head 22.

[0027] The following is a detailed description of the working principle of the hydraulic rotating spindle of this machine tool.

[0028] like Figure 1-5 As shown, by installing the sealing cover 12 on the front side of the main shaft body 111, the main shaft body 14 is installed on the rear side of the main shaft body mechanism 11 using the sealing cover 13, so as to form the shaft body mechanism 1, and the shaft core rod 21 included in the shaft core mechanism 2 is passed through the shaft core bearing 121 and the shaft core bearing 141 to complete the assembly of the shaft body mechanism 1 and the shaft core mechanism 2. When it is necessary to add lubricating oil to the inner cavity of the main shaft body 111, it is injected through the oil filling hole 113, and the lubricating oil passes through the gap between the buffer spring pieces 1122 included in the left and right shock absorbing mechanisms 112 in the inner cavity of the main shaft body 111, and the inner ring of the metal fixing ring 1123 is used The bearing 1125 connected to the connecting rod 1124 thus flows to the entire inner cavity of the main shaft body 111. At the same time, the vibration will be buffered by the extrusion between the buffer spring 1122 on the outer wall of the metal fixing ring 1123 and the inner ring of the rubber ring 1121, so as to ensure the shock absorption effect while not affecting the flow of lubricating oil to the entire inner cavity of the main shaft body 111. The shaft head 22 can be used to install accessories, and the positioning bolt 23 can be disassembled by rotating, so that the extension rod 211 at the rear end of the shaft core rod 21 can be pulled out of the groove 221 opened on the front side of the shaft head 22, so that the shaft core rod 21 and the shaft head 22 can be disassembled, which is convenient for the separate maintenance of the shaft core rod 21 or the shaft head 22.

[0029] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A hydraulic rotary spindle for a machine tool, comprising a shaft mechanism (1), characterized in that: The inner cavity of the shaft mechanism (1) is provided with a shaft core mechanism (2) penetrating from front to back, the shaft mechanism (1) comprises a main shaft mechanism (11), a sealing cover 1 (12) is fixedly installed on the front side of the main shaft mechanism (11), a sealing cover 2 (13) is fixedly installed on the rear side of the main shaft mechanism (11), a main shaft body 2 (14) is fixedly connected to the rear side of the sealing cover 2 (13), and a threaded section is provided on the outer wall of the main shaft body 2 (14). (15), the inner ring of the sealing cover (12) is fixedly mounted with an axial core bearing (121), the inner ring of the threaded section (15) is fixedly mounted with an axial core bearing (141), the axial core mechanism (2) passes through the axial core bearing (121) and the axial core bearing (141), the main shaft mechanism (11) includes a main shaft body (111), and the inner ring of the main shaft body (111) is provided with a shock absorbing mechanism (112) at the front and rear.

2. The hydraulic rotary spindle for machine tools according to claim 1, characterized in that: An oil injection hole (113) is provided at the bottom of the main shaft body (111), and the oil injection hole (113) is connected to the inner cavity of the main shaft body (111) and is located between the two shock absorbing mechanisms (112). An inner recessed groove (114) is provided at the bottom of the main shaft body (111), and the oil injection hole (113) is located in the inner recessed groove (114).

3. The hydraulic rotary spindle for machine tools according to claim 1, characterized in that: The two shock absorbing mechanisms (112) each include a rubber ring (1121), the outer wall of the rubber ring (1121) is fixedly connected to the inner ring of the main shaft body (111), the inner ring of the rubber ring (1121) is evenly fixedly mounted with a plurality of buffer springs (1122), one end of the plurality of buffer springs (1122) away from the rubber ring (1121) is fixedly mounted with a metal fixing ring (1123), the inner ring of the metal fixing ring (1123) is evenly fixedly mounted with a plurality of connecting rods (1124), one end of the plurality of connecting rods (1124) away from the metal fixing ring (1123) is fixedly mounted with a bearing (1125), and the shaft core mechanism (2) passes through the bearing (1125).

4. The hydraulic rotary spindle for a machine tool according to claim 1, characterized in that: The shaft core mechanism (2) comprises a shaft core rod (21), a shaft head (22), and a positioning bolt (23); an extension rod (211) is fixedly mounted at the rear end of the shaft core rod (21); a clamping groove (221) is provided at the front end of the shaft head (22); the extension rod (211) and the clamping groove (221) are clamped together to merge the shaft core rod (21) and the shaft head (22); the positioning bolt (23) penetrates into the inner cavity of the clamping groove (221) and is threadedly connected to the top of the extension rod (211).

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