A kind of application is applied to boring shaft telescopic big horizontal addition's internal cooling spindle structure and machine tool

Abstract

The application discloses a kind of applied to boring shaft telescopic big horizontal plus's internal cooling main shaft structure and machine tool, comprising: boring shaft transmission structure being arranged in the middle of main shaft box, boring shaft transmission structure includes hollow screw rod and drive structure, hollow screw rod end is connected with rotating mechanism, hollow screw rod front end is connected with broach mechanism, rotating mechanism includes connecting piece and is arranged in the rotating joint of connecting piece free end, connecting piece includes support sleeve and is arranged in the hollow connecting rod of support sleeve, rotating joint is communicated with hollow connecting rod, hollow screw rod is communicated with rotating joint by hollow connecting rod, broach structure includes boring shaft and is arranged in the broach rod of boring shaft, pipeline is arranged in broach rod, pipeline is communicated with hollow screw rod, and internal cooling passage is formed between pipeline and hollow screw rod and rotating joint, so that internal cooling liquid can be circulated by rotating mechanism to broach rod, meet the refrigeration demand when broach mechanism works.

Description

Technical Field

[0001] This invention relates to the field of machining, and in particular to an internally cooled spindle structure and machine tool for use in a boring machine with telescopic horizontal machining. Background Technology

[0002] In existing internally cooled spindles, the broaching mechanism and the rotating mechanism for cooling fluid circulation are located in the middle of the spindle box. The spindle rotates at high speed during operation, which places high demands on the coaxiality of the rotating mechanism and its related connecting parts. The assembly requirements are also very high, resulting in high scrap and failure rates. When used at customers' sites, the spindle often leaks coolant, causing the spindle box to be flooded, which affects the use and lifespan of the machine tool.

[0003] Therefore, an internally cooled spindle structure for use in telescopic horizontal boring machines is proposed to solve the above problems. Summary of the Invention

[0004] This invention overcomes the shortcomings of the prior art and provides an internally cooled spindle structure for use in telescopic horizontal boring machines.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an internally cooled spindle structure applied to a horizontal boring machine with telescopic mechanism, comprising: a boring spindle transmission structure disposed in the middle of the spindle box.

[0006] The boring bar transmission structure includes a hollow lead screw and a drive structure. A rotating mechanism is connected to the end of the hollow lead screw, and a broaching mechanism is connected to the front end of the hollow lead screw.

[0007] The rotating mechanism includes a connector and a rotary joint disposed at the free end of the connector. The connector includes a support sleeve and a hollow connecting rod disposed within the support sleeve. The rotary joint communicates with the hollow connecting rod.

[0008] The hollow lead screw is connected to the rotary joint through the hollow connecting rod to discharge the coolant from the center of the spindle box;

[0009] The broach structure includes a boring bar and a broach rod disposed inside the boring bar. A pipe is disposed inside the broach rod and the pipe is connected to the hollow lead screw. An internal cooling channel is formed between the pipe, the hollow lead screw and the rotary joint.

[0010] In a preferred embodiment of the present invention, the driving structure includes a bearing transition sleeve and a power structure, wherein the bearing transition sleeve is sleeved on the hollow lead screw and located between the boring shaft and the connecting member.

[0011] In a preferred embodiment of the present invention, the power structure includes a motor mount kit and a motor mounted on the motor mount kit. A timing belt is provided on the motor mount kit, and a pulley is provided on the bearing transition sleeve. The timing sleeve is connected to the pulley. The motor drives the timing belt to drive the pulley to work, thereby driving the hollow lead screw to rotate, so that the boring shaft moves back and forth on the hollow lead screw.

[0012] In a preferred embodiment of the present invention, an oil cooling cylinder is provided on the support sleeve, an oil baffle ring and a piston are provided between the oil cooling cylinder and the support sleeve, and a stop block is provided between the oil cooling cylinder and the hollow lead screw.

[0013] In a preferred embodiment of the present invention, the support sleeve includes a left support sleeve and a right support sleeve. The left support sleeve is connected to the hollow connecting rod through a locking nut and a spacer, and the right support sleeve is fixed to the bearing through an end face flange.

[0014] In a preferred embodiment of the present invention, the drawbar includes a first drawbar and a second drawbar, the first drawbar and the second drawbar are connected by a coupling, and the width of the inner tube of the first drawbar is smaller than the diameter of the inner tube of the second drawbar.

[0015] In a preferred embodiment of the present invention, the pipeline inside the first pull rod is connected to the hollow lead screw, and a connecting pipe is provided at the connection end between the hollow lead screw and the pipeline, the connecting pipe being inserted into the first pull rod.

[0016] In a preferred embodiment of the present invention, a connecting bearing sleeve is provided at the connection end between the hollow lead screw and the puller rod, and a bearing assembly is provided on the contact surface between the connecting bearing sleeve and the hollow lead screw. One side of the bearing assembly is connected to the hollow lead screw, and the other side is connected to the boring bar. A fixing sleeve is provided on the contact surface between the bearing assembly and the boring bar.

[0017] In a preferred embodiment of the present invention, a retaining ring is provided on the fixing sleeve, one side of the retaining ring is connected to the bearing assembly, and the other side is connected to a second stop block, which is disposed on the outer surface of the boring bar.

[0018] In a preferred embodiment of the present invention, the puller mechanism further includes a puller gripper assembly and a disc spring, the puller gripper assembly being connected to the free end of the second puller rod, and the disc spring being disposed on both sides of the second puller rod.

[0019] In a preferred embodiment of the present invention, a machine tool is also included, comprising any of the above-described internal cooling spindle structures.

[0020] This invention addresses the shortcomings of the prior art and has the following beneficial effects:

[0021] This invention configures the boring bar transmission structure as a drive mechanism connected to a hollow lead screw, and connects a coolant-flowing rotating mechanism to the end of the hollow lead screw, while connecting a working drawbar mechanism to the front end of the hollow lead screw. A hollow connecting pipe is installed inside the rotating mechanism, and a pipeline is installed inside the drawbar. The hollow connecting pipe communicates with the hollow lead screw, and the hollow lead screw is also connected to the pipeline. An internal cooling channel is formed between the hollow connecting pipe, the hollow lead screw, and the pipeline, allowing the internal coolant to flow from the rotating mechanism into the drawbar, thus meeting the cooling requirements of the drawbar mechanism during operation.

[0022] By relocating the rotating mechanism that supplies coolant in the middle of the spindle box to the rear in existing technology, the coaxiality requirements for part machining can be reduced, thereby reducing the scrap rate and failure rate. This eliminates the potential for coolant leakage from the spindle, ensuring that the spindle will not leak coolant even when using the internal cooling function for extended periods. Furthermore, the rotary joint installed at the end of the hollow lead screw allows the coolant in the central spindle box to be discharged, preventing coolant from leaking into the spindle box. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the internal cooling spindle structure according to a preferred embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal cooling spindle structure according to a preferred embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the boring shaft transmission structure according to a preferred embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the rotating mechanism structure of a preferred embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the broaching mechanism structure according to a preferred embodiment of the present invention.

[0029] In the diagram: 1. Boring shaft transmission structure; 11. Hollow lead screw; 12. Drive structure; 120. Bearing transition sleeve; 121. Pulley; 13. Power structure; 130. Motor mount kit; 131. Motor; 132. Synchronous belt;

[0030] 2. Rotating mechanism; 21. Connecting component; 210. Support sleeve; 2100. Oil cooling cylinder; 2101. Oil retaining ring; 2102. Piston; 2103. Stop block; 2104. Locking nut; 2105. Spacer; 2106. End face flange; 2107. Bearing; 211. Hollow connecting rod; 22. Rotary joint;

[0031] 3. Broaching mechanism; 31. Boring spindle; 32. Broaching rod; 320. First broaching rod; 321. Second broaching rod; 322. Pipeline; 323. Coupling; 33. Connecting pipe; 330. Connecting bearing sleeve; 3301. Bearing assembly; 3302. Fixing sleeve; 3303. Retaining ring; 3304. Second stop block; 34. Broaching gripper assembly; 35. Disc spring. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that when a component is described as being "fixed to" another component, it can be directly on the other component or fixed through an intermediate component. When a component is described as being "connected to" another component, it can be directly connected to the other component or may be fixed through an intermediate component. When a component is described as being "set on" another component, it can be set directly on the other component or may be set through an intermediate component. The terms "vertical," "coolant level," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] like Figures 1 to 5 As shown, an internally cooled spindle structure for a telescopic horizontal boring machine 31 includes: a boring machine drive structure 1 disposed in the middle of the spindle box.

[0036] like Figures 2 to 3As shown, the boring bar transmission structure 1 includes a hollow lead screw 11 and a drive structure 12. The drive structure 12 is connected to the hollow lead screw 11 and drives the hollow lead screw 11 to rotate. Specifically,

[0037] The drive structure 12 includes a bearing 2107, an transition sleeve 120, and a power structure 13. The bearing 2107, an transition sleeve, is fitted onto the hollow lead screw 11. The power structure 13 includes a motor mount kit 130 and a motor 131 mounted on a motor 131 kit. A pulley 121 is provided on the bearing 2107, and a synchronous belt 132 is provided on the motor mount kit 130. The synchronous belt 132 is fitted onto the pulley 121. When the motor 131 is working, the motor 131 drives the synchronous belt 132 to drive the pulley 121 to work, thereby driving the hollow lead screw 11 to rotate.

[0038] The bearing 2107 transition sleeve 120 is located between the boring spindle 31 and the connecting piece 21. The motor 131 drives the synchronous belt 132 to drive the pulley 121 to work, thereby driving the hollow lead screw 11 to rotate, so that the boring spindle 31 moves back and forth on the hollow lead screw 11. Since the rotating mechanism 2 is placed at the rear, the rotating mechanism 2 does not need to rotate with the boring spindle 31 during the back and forth movement of the boring spindle 31, which greatly reduces the coaxiality requirements during part processing, increases the pressure bearing capacity of the rotating mechanism 2, thereby reducing the scrap rate and failure rate of the workpiece, eliminating the hidden danger of spindle coolant leakage, and ensuring that the spindle will not leak coolant even when the internal cooling function is used for a long time.

[0039] like Figure 2 , Figure 4 As shown, a rotating mechanism 2 is connected to the end of the hollow lead screw 11, specifically,

[0040] The rotating mechanism 2 includes a connector 21 and a rotary joint 22 disposed at the free end of the connector 21. The connector 21 includes a support sleeve 210 and a hollow connecting rod 211 disposed in the support sleeve 210. The rotary joint 22 communicates with the hollow connecting rod 211 and is connected to the rotary joint 22 through the hollow connecting rod 211 to discharge the coolant in the center of the spindle box and prevent the coolant from leaking into the spindle box.

[0041] An oil cooling cylinder 2100 is provided on the support sleeve 210. An oil baffle ring 2101 and a piston 2102 are provided between the oil cooling cylinder 2100 and the support sleeve 210. A stop block 2103 is provided between the oil cooling cylinder 2100 and the hollow lead screw 11. With the oil cooling method, only a fixing device needs to be set at the connection end between the oil cooling cylinder 2100 and the hollow lead screw 11. There is no need to add large components such as coolant tank, pump or radiator. The structure is simpler. At the same time, coolant is prone to corroding the machine. Using oil cooling can naturally help prevent corrosion.

[0042] The support sleeve 210 includes a left support sleeve 210 and a right support sleeve 210. The left support sleeve 210 is connected to the hollow connecting rod 211 through a locking nut 2104 and a spacer 2105. The right support sleeve 210 is fixed to the bearing 2107 through an end face flange 2106 to prevent coolant leakage from the oil-cooled cylinder 2100.

[0043] like Figure 2 , Figure 5 As shown, the front end of the hollow lead screw 11 is connected to a drawbar mechanism 3, specifically,

[0044] The broaching structure includes a boring bar 31 and a broaching rod 32 disposed inside the boring bar 31. A pipe 322 is disposed inside the broaching rod 32, which is connected to the hollow lead screw 11. An internal cooling channel is formed between the pipe 322, the hollow lead screw 11, and the rotary joint 22, so that the internal coolant can flow from the rotary mechanism 2 into the broaching rod 32 to meet the cooling requirements of the broaching mechanism 3 during operation.

[0045] The drawbar 32 includes a first drawbar 320 and a second drawbar 321. The first drawbar 320 and the second drawbar 321 are connected by a coupling 323. Designing the drawbar 32 into two sections and connecting them by the coupling 323 can reduce the vibration and impact spike loads generated during movement due to the excessive length of the drawbar 32. At the same time, the component that axially connects the two shafts and transmits torque and motion has a certain ability to compensate for the misalignment of the two shafts and also has a certain buffering and shock absorption performance.

[0046] The width of the inner pipe 322 of the first drawbar 320 is smaller than the diameter of the inner pipe 322 of the second drawbar 321, so that the receiving flow rate is greater than the conveying flow rate, allowing the coolant to slowly enter the second drawbar 321 and stay for a certain period of time, thereby better cooling it.

[0047] The pipe 322 inside the first drawbar 320 is connected to the hollow lead screw 11. A connecting pipe 33 is provided at the connection end between the hollow lead screw 11 and the pipe 322. The connecting pipe 33 is inserted into the first drawbar 320. The coolant inside the hollow lead screw 11 is input into the drawbar 32 through the connecting pipe 33. The connecting pipe 33 is sleeved on the outer surface of the connection end between the hollow lead screw 11 and the pipe 322 to prevent coolant leakage during the flow process.

[0048] The drawbar mechanism 3 also includes a drawbar gripper assembly 34 and a disc spring 35. The drawbar gripper assembly 34 is connected to the free end of the second drawbar rod 321, and the disc spring 35 is located on both sides of the second drawbar rod 321.

[0049] To facilitate the assembly and disassembly of the cutter mechanism 3 and the hollow connecting rod 211, and to reduce maintenance difficulty, a connecting bearing sleeve 330 is provided at the connection end between the hollow lead screw 11 and the cutter rod 32. The specific structure is as follows:

[0050] A bearing assembly 3301 is provided on the contact surface between the bearing sleeve 330 and the hollow lead screw 11. The hollow lead screw 11 is connected to one side of the bearing assembly 3301, and the boring shaft 31 is connected to the other side. A fixing sleeve 3302 is provided on the contact surface between the bearing assembly 3301 and the boring shaft 31. A retaining ring 3303 is provided on the fixing sleeve 3302. One side of the retaining ring 3303 is connected to the bearing assembly 3301, and the other side is connected to a second stop block 3304. The second stop block 3304 is provided on the outer surface of the boring shaft 31.

[0051] Meanwhile, since the drawbar mechanism 3 and the hollow connecting rod 211 are detachably connected, the same rotary cooling mechanism can also be connected to different models of drawbar rod 32 mechanisms, increasing the applicability of the device.

[0052] like Figures 1 to 5 As shown, a machine tool includes any of the above-mentioned internally cooled spindle structures. The boring spindle transmission structure 1 is configured as a drive mechanism connected to a hollow lead screw 11, and a rotating mechanism 2 for circulating coolant is connected to the end of the hollow lead screw 11. A working broach 32 mechanism is connected to the front end of the hollow lead screw 11. A hollow connecting pipe 33 is provided inside the rotating mechanism 2, and a pipe 322 is provided inside the broach 32. The hollow connecting pipe 33 is connected to the hollow lead screw 11, and the hollow lead screw 11 is also connected to the pipe 322. An internal cooling channel is formed between the hollow connecting rod 211, the hollow lead screw 11, and the pipe 322, so that the internal coolant can flow from the rotating mechanism 2 into the broach 32, meeting the cooling requirements of the broach mechanism 3 during operation.

[0053] By moving the rotating mechanism 2, which is located in the middle of the spindle box and circulates coolant in the existing technology, to the rear, the coaxiality requirements for part machining can be reduced, thereby reducing the scrap rate and failure rate, eliminating the hidden danger of spindle coolant leakage, and ensuring that the spindle will not leak coolant when using the internal cooling function for a long time. Furthermore, the rotary joint 22 installed at the end of the hollow lead screw 11 can drain the coolant from the central spindle box and prevent coolant from leaking into the spindle box.

[0054] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of these fall within the protection scope of the present invention.

Claims

1. An internally cooled spindle structure for use in a horizontally rotating boring machine, comprising: Set in the spindle box The boring shaft drive structure of the part is characterized in that, The boring bar transmission structure includes a hollow lead screw and a drive structure. A rotating mechanism is connected to the end of the hollow lead screw, and a broaching mechanism is connected to the front end of the hollow lead screw. The rotating mechanism includes a connector and a rotary joint disposed at the free end of the connector. The connector includes a support sleeve and a hollow connecting rod disposed within the support sleeve. The rotary joint communicates with the hollow connecting rod. The hollow lead screw is connected to the rotary joint through the hollow connecting rod to discharge the coolant from the center of the spindle box; The broaching mechanism includes a boring bar and a broaching rod disposed inside the boring bar. A pipe is disposed inside the broaching rod and the pipe is connected to the hollow lead screw. An internal cooling channel is formed between the pipe, the hollow lead screw, and the rotary joint. An oil cooling cylinder is provided on the support sleeve, an oil baffle ring and a piston are provided between the oil cooling cylinder and the support sleeve, and a stop block is provided between the oil cooling cylinder and the hollow lead screw; The support sleeve includes a left support sleeve and a right support sleeve. The left support sleeve is connected to the hollow connecting rod via a locking nut and a spacer. The right support sleeve is fixed to the bearing via an end face flange. The pull rod includes a first pull rod and a second pull rod. The first pull rod and the second pull rod are connected via a coupling. The width of the inner pipe of the first pull rod is smaller than the diameter of the inner pipe of the second pull rod. The inner pipe of the first pull rod communicates with the hollow lead screw. A connecting pipe is provided at the connection end between the hollow lead screw and the pipe. The connecting pipe is inserted into the first pull rod. A connecting bearing sleeve is provided at the connection end between the hollow lead screw and the pull rod. A bearing assembly is provided on the contact surface between the connecting bearing sleeve and the hollow lead screw. One side of the bearing assembly is connected to the hollow lead screw, and the other side is connected to the boring shaft. A fixing sleeve is provided on the contact surface between the bearing assembly and the boring shaft. A retaining ring is provided on the fixing sleeve. One side of the retaining ring is connected to the bearing assembly, and the other side is connected to a second stop block. The second stop block is located on the outer surface of the boring shaft.

2. The internally cooled spindle structure for a horizontally operated boring machine (MOM) with telescopic extension mechanism as described in claim 1. Its features are: The drive structure includes a bearing transition sleeve and a power structure. The bearing transition sleeve is sleeved on the hollow lead screw and located between the boring shaft and the connecting member.

3. The internally cooled spindle structure for a telescopic horizontal boring machine according to claim 2, characterized in that: The power structure includes a motor mount kit and a motor mounted on the motor mount kit. A timing belt is provided on the motor mount kit, and a pulley is provided on the bearing transition sleeve. The timing belt is connected to the pulley. The motor drives the timing belt to drive the pulley to work, thereby driving the hollow lead screw to rotate, so that the boring shaft moves back and forth on the hollow lead screw.

4. A machine tool, characterized in that: Includes the internal cooling spindle structure as described in any one of claims 1-3.

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