WO2023168904A1

WO2023168904A1 - Oil-proof servo motor for computer numerical control machine tool

Info

Publication number: WO2023168904A1
Application number: PCT/CN2022/111974
Authority: WO
Inventors: 邵文华
Original assignee: 浙江欣立电器科技有限公司
Priority date: 2022-03-11
Filing date: 2022-08-12
Publication date: 2023-09-14
Also published as: CN114709961A

Abstract

The present invention relates to an oil-proof servo motor for a computer numerical control machine tool, comprising a motor body and a driving shaft arranged on the motor body. An oil-proof mechanism is arranged on the driving shaft; the oil-proof mechanism comprises a backing plate, a sealing bearing, an oil-proof assembly, a driving assembly, a shell, connecting blocks, a mounting disc, and a sealing ring; the sealing bearing is arranged on the driving shaft; the backing plate is arranged on the sealing bearing; the oil-proof assembly is arranged on the backing plate; the driving assembly is arranged on the driving shaft; the shell is arranged on the backing plate; the connecting blocks are circumferentially arranged on the shell; the connecting blocks are fixedly connected to the backing plate. The present invention is used to solve the technical problem that during machining of a computer numerical control machine tool, an output shaft of a servo motor is prone to damaging a framework oil seal, and long-time work of the servo motor is prone to causing abrasion of a sealing ring at the position where the servo motor and a reduction gearbox are connected, resulting in that a lubricating oil in the gearbox would easily enter the servo motor. According to the present invention, an oil can be prevented from entering the servo motor, the adaptability is high, the sealing performance is good, the maintenance is convenient, and the service life is long.

Description

An oil-proof servo motor for CNC machine tools

Technical field

The invention relates to a servo motor, in particular to an oil-proof servo motor for CNC machine tools.

Background technique

CNC machine tool is an automated machine tool equipped with a program control system. CNC machine tools can better solve the problems of complex, precise, small batch, and multi-variety parts processing. They are flexible, high-performance automated machine tools, represent the development direction of modern machine tool control technology, and are a typical electromechanical integration. chemical products. The basic components of CNC machine tools include processing program carriers, CNC devices, servo drive devices, machine tool main bodies and other auxiliary devices.

The servo drive device of CNC machine tools generally includes spindle servo motor, X-axis servo motor, Y-axis servo motor, Z-axis servo motor, reduction gearbox and transmission device. The output shaft of each servo motor is connected to the reduction gearbox. The reduction gear The box is connected to the transmission device to perform corresponding movement. At present, when the output shaft of the servo motor is connected to the reduction gearbox, a skeleton oil seal is generally installed on the output shaft of the servo motor to prevent the lubricating oil in the reduction gearbox from leaking into the servo motor. However, due to the servo motor during CNC machine tool processing, The output shaft speed requirements are variable, which easily damages the skeleton oil seal, resulting in the need to frequently replace the skeleton oil seal. The connection between the reduction gearbox and the output shaft of the servo motor is usually sealed by a sealing ring. When the servo motor works for a long time, the seal is easy to wear. circle, causing the lubricating oil in the gear box to easily enter the servo motor.

technical problem

The purpose of the present invention is to provide an oil-proof servo motor for CNC machine tools, which is used to solve the problem that the output shaft speed requirements of the servo motor are variable during CNC machine tool processing, and the skeleton oil seal is easily damaged, resulting in the need to frequently replace the skeleton oil seal, and the servo motor When working for a long time, the sealing ring at the connection between the servo motor and the reduction gearbox is easy to wear, causing the lubricating oil in the gearbox to easily enter the servo motor.

Technical solutions

The technical solution adopted by the present invention to solve the above technical problems is: an oil-proof servo motor for CNC machine tools, which includes a motor body and a drive shaft. The motor body is provided with a flange, and a sealed bearing is installed on the flange. The drive shaft is sleeved on the sealed bearing and passes through the flange. The drive shaft is provided with an oil-proof mechanism. The oil-proof mechanism includes a backing plate, a sealed bearing, an oil-proof component, a drive component, a housing, a connecting block, and an installation disc and sealing ring, the sealed bearing is arranged on the drive shaft, the backing plate is set on the outer wall of the sealed bearing, the oil-proof assembly is set on the backing plate, the driving assembly is set on the drive shaft and is connected with the anti-oil assembly. The oil assembly cooperates, the housing is arranged on the backing plate, the connecting block is circumferentially arranged on the housing, the connecting block is fixedly connected to the backing plate, the flange is provided with a mounting slot, and the mounting plate is installed In the installation groove and sleeved on the outer wall of the casing, the sealing ring is arranged between the installation plate and the outer wall of the casing, and the driving shaft passes through the casing.

Further, the oil-proof assembly includes a mounting plate, a connecting ring, a blocking plate and a sealing sleeve. The mounting plate is installed on the outer wall of the sealed bearing. The blocking plate has a tapered cross-section. The connecting ring is fixedly mounted on the blocking plate. On the outer wall, the connecting ring is fixedly connected to the mounting plate, a cavity is formed between the blocking plate and the mounting plate, an annular slot is provided in the middle of the sealing sleeve, and an annular clamping block is fixedly provided at one end of the blocking plate. The annular clamping block is clamped in the annular slot, and forms an airtight seal through the cavity and the sealing sleeve, so that when the servo motor is working, it can prevent external lubricating oil droplets from entering the blocking plate and thus not entering the servo motor. internal.

Further, both ends of the sealing sleeve are slope-shaped, and annular placement grooves are provided at both ends of the sealing sleeve. An annular spring is provided in the placement groove, and an annular card is provided on one side of the sealing sleeve corresponding to the driving component, so The cross-section of the annular card is inclined to enhance the sealing of the driving shaft by the sealing sleeve.

Further, the driving assembly includes a rotating block, a transmission rod, a ball stud, an extrusion block, a convex ring, a blocking member and an elastic member. The rotating block is fixedly arranged on the driving shaft, and the rotating block is in contact with the inner wall of the housing. A sealing gasket is provided between them, the transmission rod is fixedly installed on the rotating block, the ball head column is fixedly installed on the free end of the transmission rod, the convex ring is fixedly installed on the extrusion block, and the convex ring is sleeved On the driving shaft, the extrusion block is provided with a track groove, the ball head column matches the track groove, an accommodation cavity is formed between the extrusion block and the blocking plate, and the blocking member is arranged on the extrusion block. On the block, the elastic member is arranged between the extrusion block and the connecting ring, so that when the servo motor is working, it can drive the rotating block to rotate, and the rotation of the rotating block drives the ball head column to move between the track groove and the surface of the extrusion block, thereby It allows the extrusion block to compress and seal the accommodation cavity, allowing the annular card to engage with the inside of the convex ring, further enhancing the sealing when the servo motor is working. At the same time, the oil leakage from the reduction gearbox when the servo motor is not working can be introduced into the accommodation cavity for collection. , to further prevent leakage from entering the inside of the servo motor.

Furthermore, the depth dimension from the middle to the end of the track groove gradually becomes smaller, and the end of the track groove is flush with the outer surface of the extrusion block, so that the ball head column can squeeze the extrusion block during the rotation process, so that the extrusion block can be squeezed. Pressure block moves.

Further, the blocking member includes a sleeve, a first blocking ring and a second blocking ring. One end of the sleeve is fixedly mounted on the connecting ring, and the first blocking ring is fixedly mounted on the extrusion block. Located between the extrusion block and the sleeve, the second blocking ring has a trapezoidal cross-section, and the second blocking ring is fixedly connected to the first blocking ring, so that when the servo motor is working, it will not be blocked by the accommodation cavity. The oil in the internal memory causes the oil to splash, causing the oil to enter the servo motor from other places.

Further, the elastic member includes a blocking ring, a connecting sleeve, a spring, a connecting rod, a sliding block and a limiting ring. The blocking ring is fixedly arranged on the extrusion block, and the connecting rod is circumferentially arranged on the blocking ring. The sliding block is fixedly arranged on the free end of the connecting rod, one end of the connecting sleeve is fixedly arranged on the connecting ring and corresponds to the position of the connecting rod, the spring is arranged in the connecting sleeve, and one end of the spring is fixedly connected to the bottom of the connecting sleeve. The other end of the spring is against the sliding block, the limit ring is set on the connecting sleeve, and the connecting rod passes through the limit ring, so that when the servo motor is not working and the ball head column is located in the track groove, the The pressure block can be reset.

Further, a fixed block is fixedly provided on the housing, an escape groove is provided between the retaining ring and the fixed block, a leakage groove is provided on the fixed block, a through groove is provided on the sleeve, and the through groove is provided on the sleeve. The groove and the leakage groove are connected, and the cross-sectional area of the drain groove is larger than the cross-sectional area of the through-slot. A flow groove is provided on the housing, and the flow groove is connected with the drain groove. A plug is provided at the end of the flow groove, so The plug is transparent. When there is oil in the accommodation chamber, the oil can enter the flow tank along the channel and drain groove, and you can check whether there is oil in the flow tank through the transparent plug. When there is oil, you can Check whether the reduction gearbox is leaking oil or the sealing gasket is damaged.

Furthermore, the flow tank is inclined, and by opening the plug, the oil in the accommodation chamber can be released, which facilitates maintenance.

beneficial effects

The oil-proof servo motor for CNC machine tools according to the present invention has the following advantages.

1. Through the cooperation of gaskets, sealed bearings, oil-proof components, drive components, housings, connecting blocks, mounting plates and sealing rings, it can not only prevent oil from entering the servo motor from the outside, but also prevent oil from entering the servo motor along the drive When the shaft enters the servo motor and this oil-proof mechanism is used to replace the skeleton oil seal, it can adapt to the variable speed of the drive shaft of the servo motor and save usage costs.

2. The oil-proof component includes the mounting plate, connecting ring, blocking plate and sealing sleeve. Through the cooperation of the mounting plate, connecting ring, blocking plate and sealing sleeve, the servo motor drive shaft can form an airtight seal when it rotates. Enhance sealing effect.

3. The driving assembly includes a rotating block, a transmission rod, a ball stud, an extrusion block, a convex ring, a blocking piece and an elastic piece. The cooperation with the elastic member enables the annular card to engage with the inside of the convex ring when the servo motor is working, further enhancing the sealing performance of the servo motor when it is working. When the servo motor is not working, the oil leakage from the reduction gearbox can be introduced into the accommodation cavity to prevent leakage from entering the inside of the servo motor.

4. Through the cooperation of the oil-proof component and the drive component, three progressive seals are formed when the servo motor is static or dynamic, which can prevent external oil from entering the interior of the servo motor along the drive shaft and passing through the fixed block and passage. The cooperation of grooves, drains, flow grooves and plugs can detect oil leakage in the reduction gearbox servo connected to the drive shaft and improve the overall working life of the CNC machine tool.

Description of the drawings

Figure 1 is a schematic structural diagram of an oil-proof servo motor for CNC machine tools according to the present invention.

Figure 2 is a schematic cross-sectional view of an oil-proof servo motor for CNC machine tools according to the present invention.

Figure 3 is an enlarged structural schematic diagram of position A in Figure 2.

Figure 4 is an enlarged structural schematic diagram of position B in Figure 2.

Figure 5 is a schematic diagram of the installation structure of the oil-proof mechanism in the oil-proof servo motor for CNC machine tools according to the present invention.

Figure 6 is a schematic diagram of the partial installation structure of the oil-proof component in the oil-proof servo motor for CNC machine tools according to the present invention.

Figure 7 is a schematic cross-sectional structural view of the oil-proof assembly in the oil-proof servo motor for CNC machine tools according to the present invention.

FIG. 8 is an enlarged structural schematic diagram of position C in FIG. 7 .

Figure 9 is a schematic structural diagram of the sealing sleeve in the oil-proof assembly of the CNC machine tool servo motor according to the present invention.

Among them, the motor body 1, the drive shaft 11, the flange 12, the mounting groove 121, the housing 2, the flow groove 201, the connecting block 21, the backing plate 22, the mounting plate 23, the sealed bearing 24, the blocking plate 25, the annular clamping block 250 , connecting ring 251, sleeve 252, through groove 253, accommodation cavity 254, sealing sleeve 26, annular slot 261, annular placement slot 262, annular spring 263, ramp 264, annular card 265, fixed block 27, leakage groove 271 , plunger 28, cavity 29, mounting plate 3, sealing ring 31, rotating block 4, sealing gasket 41, transmission rod 42, ball head column 43, extrusion block 44, track groove 441, raised ring 45, first seal Blocking ring 46, second blocking ring 461, blocking ring 5, connecting sleeve 51, spring 52, connecting rod 53, sliding block 531, and limiting ring 54.

Best Mode of Carrying Out the Invention

The present invention will be described in detail below with reference to the drawings and specific embodiments.

As shown in Figures 1 to 9, the oil-proof servo motor for CNC machine tools according to the present invention includes a motor body 1 and a drive shaft 11. The motor body 1 is provided with a flange 12, and a sealed bearing 24 is installed on the flange 12. The drive shaft 11 is set on the sealed bearing 24 and passes through the flange 12. The drive shaft 11 is provided with an oil-proof mechanism. The oil-proof mechanism includes a backing plate 22, a sealed bearing 24, an oil-proof assembly, a driving assembly, a housing 2, a connecting block 21, an installation plate 3 and a sealing ring 31. Through the backing plate 22, The mutual cooperation of the sealed bearing 24, the oil-proof component, the drive component, the housing 2, the connecting block 21, the mounting plate 3 and the sealing ring 31 can not only prevent oil from entering the servo motor from the outside, but also prevent oil from flowing along the drive shaft. 11Enter the servo motor.

The backing plate 22 is fixedly arranged on the outer wall of the sealed bearing 24, and the oil-proof assembly is arranged on the backing plate 22. When the drive shaft 11 rotates, the oil-proof assembly will not rotate. The drive component is arranged on the drive shaft 11 and cooperates with the oil-proof component, so that when the drive shaft 11 rotates, the drive component can rotate and contact the oil-proof component. Through the mutual cooperation of the drive component and the oil-proof component, when the servo motor is static or When dynamic, three progressive seals are formed to prevent external oil from entering the interior of the servo motor along the drive shaft. The housing 2 is arranged on the backing plate 22, and the connecting block 21 is circumferentially arranged on the housing 2. The connecting block 21 and the backing plate 22 are fixedly connected by bolts. The flange 12 is provided with an installation groove 121. The installation plate 3 is installed in the installation groove 121 and is sleeved on the outer wall of the housing 2. The sealing ring 31 is provided between the installation plate 3 and the outer wall of the housing 2. The drive shaft 11 passes through When the external oil leaks out of the housing 2 and leaks onto the housing 2, the probability of entering the servo motor from the housing 2 along the mounting plate 3 is reduced.

The oil-proof assembly includes a mounting plate 23, a connecting ring 251, a blocking plate 25 and a sealing sleeve 26. The mounting plate 23 is fixedly mounted on the outer wall of the sealed bearing 24. The cross section of the blocking plate 25 is tapered, and the connecting ring 251 is fixedly arranged on the outer wall of the blocking plate 25. The connecting ring 251 and the mounting plate 23 are fixedly connected by bolts, so that when the drive shaft 11 rotates, the mounting plate 23 and the blocking plate 25 will not Turn. A cavity 29 is formed between the blocking plate 25 and the mounting plate 23. An annular clamping groove 261 is provided in the middle of the sealing sleeve 26. An annular clamping block 250 is fixedly provided at one end of the blocking plate 25. The annular clamping block 250 is clamped in the annular clamping slot 261. Inside. When the servo motor is working, the drive shaft 11 rotates, and the heat generated by the rotation of the drive shaft 11 expands the air in the cavity 29. The expanded air forms an airtight seal with the sealing sleeve 26, and cooperates with the sealing sleeve 26 itself to form an airtight seal. The double sealing effect enables the servo motor to prevent external lubricating oil droplets from entering the blocking plate 25 when the servo motor is working, thereby preventing them from entering the inside of the servo motor. The two ends of the sealing sleeve 26 are slope-shaped 264, and annular placement grooves 262 are provided at both ends of the sealing sleeve 26. An annular spring 263 is provided in the annular placement groove 262 to enhance the sealing of the driving shaft 11 by the sealing sleeve 26. The sealing sleeve 26 is provided with an annular card 265 on one side corresponding to the driving component. The cross section of the annular card 265 is inclined. Through the mutual cooperation between the annular card 265 and the driving component, a third sealing effect is formed.

The driving assembly includes a rotating block 4, a transmission rod 42, a ball stud 43, an extrusion block 44, a convex ring 45, a blocking member and an elastic member. The rotating block 4 is fixedly arranged on the drive shaft 11, and a sealing gasket 41 is provided between the rotating block 4 and the inner wall of the housing 2. On the one hand, it avoids friction between the rotating block 4 and the housing 2, and on the other hand, it serves as a seal. Effect of shell 2. The transmission rod 42 is fixedly installed on the rotating block 4 , and the ball stud 43 is fixedly installed on the free end of the transmission rod 42 . The convex ring 45 is fixedly arranged on the extrusion block 44 , and the convex ring 45 is sleeved on the drive shaft 11 . The extrusion block 44 is provided with a track groove 441 . The ball stud 43 matches the track groove 441 . The depth dimension from the middle to the end of the track groove 441 gradually becomes smaller. The end of the track groove 441 is flush with the outer surface of the extrusion block 44 . An accommodating cavity 254 is formed between the extrusion block 44 and the blocking plate 25. When the rotation block 4 rotates, the ball stud 43 is driven to rotate. During the rotation process, the ball stud 43 can continuously squeeze the extrusion block 44, causing the extrusion to occur. The pressing block 44 moves to compress and seal the accommodation cavity 254, further enhancing the sealing effect.

The blocking member is provided on the extrusion block 44, and the elastic member is provided between the extrusion block 44 and the connecting ring 251. Through the cooperation of the blocking member and the elastic member, when the servo motor does not work, the reduction gear box can be The leaked oil is introduced into the accommodation cavity 254 for collection to prevent leakage from entering the interior of the servo motor.

The blocking member includes a sleeve 252, a first blocking ring 46 and a second blocking ring 461. One end of the sleeve 252 is fixedly mounted on the connecting ring 251, and the first blocking ring 46 is fixedly mounted on the extrusion block 44. And located between the extrusion block 44 and the sleeve 252, the second blocking ring 461 has a trapezoidal cross-section, and the second blocking ring 461 is fixedly connected to the first blocking ring 46. When the servo motor is working, the extrusion block 44 moves toward the bottom of the sleeve 252 so that the accommodating cavity 254 is compressed and closed. The end of the first blocking ring 46 offsets the connecting ring 251 and the oil in the accommodating cavity 254 is squeezed. Towards the first sealing ring 46, due to the obstruction of the second sealing ring 461, the oil in the accommodation cavity 254 will not splash, allowing the oil to enter the servo motor from other places.

The elastic member includes a retaining ring 5, a connecting sleeve 51, a spring 52, a connecting rod 53, a sliding block 531 and a limiting ring 54. The blocking ring 5 is fixedly installed on the extrusion block 44, the connecting rod 53 is circumferentially installed on the blocking ring 5, the sliding block 531 is fixedly installed on the free end of the connecting rod 53, one end of the connecting sleeve 51 is fixedly installed on the connecting ring 251, and Corresponding to the position of the connecting rod 53, the spring 52 is disposed in the connecting sleeve 51. One end of the spring 52 is fixedly connected to the bottom of the connecting sleeve 51, and the other end is against the sliding block 531. The limiting ring 54 is arranged on the connecting sleeve 51, and the connecting rod 53 passes through the limiting ring 54 to prevent the connecting rod 53 and the connecting sleeve 51 from slipping. When the servo motor is not working and the ball stud 43 is located in the track groove 441, the extrusion block 44 can be reset (extrusion block 44).

A fixing block 27 is fixedly provided on the housing 2, and an escape groove 501 is provided between the blocking ring 5 and the fixing block 27, so that the fixing block 27 can pass through the blocking ring 5 when the housing 2 is installed. The fixed block 27 is provided with a drain groove 271, and the sleeve 252 is provided with a through groove 253. The through groove 253 is connected with the drain groove 271, and the cross-sectional area of the drain groove 271 is larger than the cross-sectional area of the through groove 253, so that the through groove 253 in the accommodation cavity 254 The oil can completely enter the drain tank 271. A flow groove 201 is provided on the housing 2, and the flow groove 201 is connected with the leakage groove 271, so that the oil can enter the flow groove 201 through the leakage groove 271. A plug 28 is provided at the end of the flow tank 201. The plug 28 is transparent. When there is oil in the accommodation chamber 254, the oil can enter the flow tank 201 along the channel 253 and the leakage groove 271 and be blocked by the plug 28. Check whether there is oil in the flow tank 201 through the transparent plug 28. When oil is present, it can be checked whether the reduction gearbox is leaking oil or whether the sealing gasket 41 is damaged. The flow tank 201 is inclined, and by opening the plunger 28, the oil in the accommodation chamber 254 can be released to facilitate maintenance.

Industrial applicability

How to use this embodiment: when the servo motor is working, the drive shaft 11 rotates, and the rotation of the drive shaft 11 generates heat, which expands the air in the cavity 29. The expanded air forms an airtight seal with the sealing sleeve 26, and then cooperates with the seal. The sealing of the sleeve 26 itself forms a double sealing effect. During the rotation of the drive shaft 11, the rotating block 4 rotates, and the rotation of the rotating block 4 drives the transmission rod 42 and the ball head column 43 to rotate. During the rotation of the ball head column 43, The extrusion block 44 can be continuously squeezed to move the extrusion block 44 and compress and seal the accommodating cavity 254, so that the annular card 265 is clamped on the inside of the convex ring 45, further enhancing the sealing effect, and the extrusion block 44 seals the accommodating cavity 254 Squeeze, so that the oil in the accommodation cavity 254 enters the drain groove 271 through the through groove 253, and then enters the flow groove 201. In this process, due to the blocking of the first blocking ring 46 and the second blocking ring 461, Oil cannot leak out of the squeeze block 44.

When the servo motor is not working, there are two situations. One is that the ball head column 43 opens the accommodation cavity 254 on the track groove 441. In this case, the external oil enters the accommodation cavity 254 along the drive shaft 11. Since Blocked by the sealing sleeve 26, the oil enters the drain groove 271 along the channel 253 under the action of gravity, and then enters the flow tank 201; the other is that the ball head column 43 compresses the extrusion block 44 to seal the accommodation cavity 254, and the annular card 265 is clamped Entering the inside of the convex ring 45, the drive shaft 11 is sealed by the sealing sleeve 26, the annular card 265, and the convex ring 45. The external oil will not enter the extrusion block 44, so that when the servo motor is working, even if the external oil leaks, the oil It will not enter the servo motor.

Claims

An oil-proof servo motor for CNC machine tools, including a motor body and a drive shaft. The motor body is provided with a flange. A sealed bearing is installed on the flange. The drive shaft is sleeved on the sealed bearing and passes through the flange. It is characterized in that: the drive shaft is provided with an oil-proof mechanism, and the oil-proof mechanism includes a backing plate, a sealed bearing, an oil-proof component, a drive component, a housing, a connecting block, a mounting plate and a sealing ring. The sealed bearing is arranged on the drive shaft, the backing plate is set on the outer wall of the sealed bearing, the oil-proof assembly is set on the backing plate, the driving assembly is set on the drive shaft and cooperates with the oil-proof assembly, the housing is provided On the backing plate, the connecting block is circumferentially arranged on the housing. The connecting block is fixedly connected to the backing plate. A mounting slot is provided on the flange. The mounting plate is installed in the mounting slot and sleeved on the shell. On the outer wall, the sealing ring is arranged between the installation plate and the outer wall of the housing, and the drive shaft passes through the housing.
An oil-proof servo motor for CNC machine tools according to claim 1, characterized in that: the oil-proof assembly includes a mounting plate, a connecting ring, a blocking plate and a sealing sleeve, and the mounting plate is installed on the outer wall of the sealed bearing, The cross-section of the blocking plate is tapered, the connecting ring is fixedly arranged on the outer wall of the blocking plate, the connecting ring is fixedly connected to the mounting plate, a cavity is formed between the blocking plate and the mounting plate, and the sealing sleeve An annular clamping slot is provided in the middle, and an annular clamping block is fixedly provided at one end of the blocking plate, and the annular clamping block is clamped in the annular clamping slot.
An oil-proof servo motor for CNC machine tools according to claim 2, characterized in that: both ends of the sealing sleeve are slope-shaped, and annular placement grooves are provided at both ends of the sealing sleeve. There is an annular spring, and the sealing sleeve is provided with an annular card on one side corresponding to the driving component, and the cross section of the annular card is inclined.
An oil-proof servo motor for CNC machine tools according to claim 3, characterized in that: the driving assembly includes a rotating block, a transmission rod, a ball stud, an extrusion block, a convex ring, a blocking member and an elastic member, The rotating block is fixedly arranged on the drive shaft, a sealing gasket is arranged between the rotating block and the inner wall of the housing, the transmission rod is fixedly arranged on the rotating block, and the ball-head column is fixedly arranged on the free end of the transmission rod. , the convex ring is fixedly arranged on the extrusion block, the convex ring is sleeved on the drive shaft, the extrusion block is provided with a track groove, the ball head column matches the track groove, the extrusion block An accommodation cavity is formed between the blocking member and the blocking plate, the blocking member is provided on the extrusion block, and the elastic member is provided between the extrusion block and the connecting ring.
An oil-proof servo motor for CNC machine tools according to claim 4, characterized in that the depth dimension from the middle to the end of the track groove gradually becomes smaller, and the end of the track groove is flush with the outer surface of the extrusion block.
An oil-proof servo motor for CNC machine tools according to claim 5, characterized in that: the blocking member includes a sleeve, a first blocking ring and a second blocking ring, and one end of the sleeve is fixedly arranged on On the connecting ring, the first blocking ring is fixedly arranged on the extrusion block and is located between the extrusion block and the sleeve. The cross section of the second blocking ring is trapezoidal. The second blocking ring is connected to the third A sealing ring secures the connection.
An oil-proof servo motor for CNC machine tools according to claim 6, characterized in that: the elastic member includes a retaining ring, a connecting sleeve, a spring, a connecting rod, a sliding block and a limiting ring, and the retaining ring is fixedly arranged On the extrusion block, the connecting rod is circumferentially arranged on the retaining ring, the sliding block is fixedly arranged on the free end of the connecting rod, and one end of the connecting sleeve is fixedly arranged on the connecting ring and corresponds to the position of the connecting rod, so The spring is arranged in the connecting sleeve, one end of the spring is fixedly connected to the bottom of the connecting sleeve, the other end of the spring is against the sliding block, the limiting ring is arranged on the connecting sleeve, and the connecting rod passes through the limiting ring.
An oil-proof servo motor for CNC machine tools according to claim 7, characterized in that: a fixed block is fixedly provided on the housing, an avoidance groove is provided between the retaining ring and the fixed block, and the fixed block A drain groove is provided on the sleeve, a through groove is provided on the sleeve, the through groove is connected with the drain groove, and the cross-sectional area of the drain groove is larger than the cross-sectional area of the through groove, a flow groove is provided on the housing, and the flow groove is Communicated with the drain, a plug is provided at the end of the flow tank, and the plug is transparent.
An oil-proof servo motor for CNC machine tools according to claim 8, characterized in that: the flow groove is inclined.