A mounting structure of a universal rotary joint

Abstract

This utility model discloses a universal rotary joint installation structure, including a rotary joint, a hose, a shuttle valve, and a hose limiting mechanism. The rotary joint is vertically fixed to the tail end of a machine tool spindle via a threaded connection. The hose is horizontally positioned, with one end connected to the rotary joint via a right-angle connector and a straight connector, and the other end connected to the shuttle valve via a transition connector. A spindle box is located on the outer side of the machine tool spindle, and a mounting base is fixed to the upper side of the spindle box. The hose limiting mechanism is located on the mounting base and has a limiting channel. Anti-collision rubber blocks are provided on both sides of the limiting channel. The height of the limiting channel is less than the outer diameter of the hose, and the width of the limiting channel is greater than the outer diameter of the hose. The hose passes through the limiting channel. This installation structure facilitates the installation and use of the rotary joint, avoids damage to the rotary joint, and gives the rotary joint a longer service life and a lower failure rate. It is adaptable to complex working conditions and is applicable to both mechanical and electric spindles.

Description

Technical Field

[0001] This utility model relates to an installation structure for a vertical machining center, specifically to an installation structure for a universal rotary joint. Background Technology

[0002] The rotary joint is a crucial component of the spindle in a vertical machining center. It is typically threaded to the tail end of the spindle to assist in achieving the spindle's center water outlet function. The rotary joint is installed inside the tool sleeve. It connects to the shuttle valve via a hose, connector, and steel pipe. The hose is vertically positioned, and the shuttle valve is mounted on a bracket.

[0003] During the installation of the rotary joint, since the rotary joint is located inside the tool sleeve, it must first be installed vertically on the spindle, followed by the installation of the tool sleeve and other components. Finally, the pipe fitting is installed laterally on one radial side of the rotary joint. When installing the pipe fitting, the rotary joint's outer shell is subjected to force, which will exert force and off-center load on the spindle and bearings inside the rotary joint. This may damage the rotary joint, resulting in significant cost waste, as a single rotary joint can cost thousands or even tens of thousands of yuan, making procurement and maintenance expensive.

[0004] During the use of the rotary joint, because the hose is in a free-falling state under gravity and is not fixed, when the spindle center water outlet function is activated, the water flow impacts the hose due to inertia. This impact force is transmitted to the rotary joint through the steel pipe, causing stress on the rotary joint's outer shell, which in turn puts stress on the internal bearings. Therefore, frequent activation of the spindle center water outlet function can easily lead to damage to the rotary joint. Furthermore, the forward and reverse rotation of the spindle causes the rotary joint to rotate, and the hose also moves back and forth, similarly causing stress on the rotary joint. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a universal rotary joint installation structure that addresses the shortcomings of the existing technology, facilitates the installation and use of the rotary joint, avoids damage to the rotary joint, gives the rotary joint a longer service life and a lower failure rate, adapts to complex working conditions, and is applicable to both mechanical spindles and electric spindles.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a general-purpose rotary joint installation structure, including a rotary joint, a hose, a shuttle valve, and a hose limiting mechanism. The rotary joint is vertically fixed to the tail end of the machine tool spindle by a threaded connection. The hose is horizontally arranged. One end of the hose is connected to the rotary joint via a right-angle connector and a straight connector. The other end of the hose is connected to the shuttle valve via a transition connector. A spindle box is provided on the outside of the machine tool spindle. A mounting base is fixed on the upper side of the spindle box. The hose limiting mechanism is arranged on the mounting base. The hose limiting mechanism has a limiting channel. Anti-collision rubber blocks are provided on the left and right sides of the limiting channel. The height of the limiting channel is less than the outer diameter of the hose, and the width of the limiting channel is greater than the outer diameter of the hose. The hose passes through the limiting channel.

[0007] The installation structure of this rotary joint adopts a horizontal hose arrangement, combined with a hose limiting mechanism to limit the hose, facilitating the installation and use of the rotary joint. This ensures that the rotary joint remains free and almost stress-free during both installation and use, preventing damage to the rotary joint. In addition, the rotary joint's inlet is a right-angle connector, which reduces the direct impact of water on the rotary joint, acting as a buffer and further protecting the rotary joint. As a result, the rotary joint has a longer service life and a lower failure rate, adapting to complex working conditions.

[0008] After the rotary joint is installed, during use, the limiting channel can restrict the vertical freedom of the hose and provide a certain degree of freedom in the horizontal direction, allowing the hose to withstand a certain degree of flexible deformation. At the same time, the anti-collision rubber blocks set on the left and right sides of the limiting channel play a limiting and buffering role in the horizontal direction, thereby preventing the hose from becoming constricted due to increased pressure during use and damaging the rotary joint. It can also cope with the possible left and right movement of the hose when the spindle motor rotates forward and backward, leaving room for the hose to swing left and right.

[0009] Preferably, the hose limiting mechanism includes a mounting plate, an upper pressure plate, and a lower pressure plate. The mounting plate is fixed to the upper side of the mounting base. The upper pressure plate and the lower pressure plate are fixed to the mounting plate at intervals. Two anti-collision rubber blocks are fixed to the lower side of the upper pressure plate at intervals. The upper pressure plate, the lower pressure plate, and the two anti-collision rubber blocks form the limiting channel.

[0010] As a further preferred embodiment, the upper pressure plate is connected to the mounting plate by a plurality of first screws. The upper pressure plate has a plurality of first oblong holes, the long axis of each first oblong hole is along the vertical direction, and each first oblong hole is used to pass through one first screw. The vertical position of the upper pressure plate is adjustable.

[0011] As a further preferred embodiment, the mounting plate is connected to the upper side of the mounting base by a number of second screws. The mounting plate has a number of second oblong holes, the long axis of each second oblong hole is along the left-right direction, and each second oblong hole is used to pass through a second screw. The left-right position of the mounting plate is adjustable.

[0012] Preferably, a bracket is fixed on one side of the spindle box, and a back plate is installed on the bracket. The shuttle valve, the back plate, and the bracket are connected by a number of third screws. A number of third oblong holes are opened on the bracket. The long axis of each third oblong hole is along the front-back direction. Each third oblong hole is used to pass through one third screw. The front-back position of the shuttle valve is adjustable.

[0013] Compared with existing technologies, this utility model has the following advantages: The installation structure of this universal rotary joint adopts a horizontal hose arrangement, combined with a hose limiting mechanism to limit the hose, facilitating the installation and use of the rotary joint. This ensures the rotary joint remains free and virtually stress-free during both installation and use, preventing damage. Furthermore, the right-angle inlet of the rotary joint reduces the direct impact of water on the joint, acting as a buffer and further protecting it. This results in a longer service life and a lower failure rate, adapting to complex working conditions and suitable for both mechanical and electric spindles. After its implementation, field tests and after-sales feedback have shown a low failure rate, significantly saving on purchase costs, maintenance costs, and time and labor costs associated with after-sales maintenance. Attached Figure Description

[0014] Figure 1 This is a front view of the mounting structure in the embodiment after it has been put into use on an existing machine tool spindle;

[0015] Figure 2 The left view of the mounting structure in the embodiment after it has been put into use on an existing machine tool spindle;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 for Figure 2 BB section view;

[0018] The specific reference numerals in the figure are as follows:

[0019] 1-Rotary joint, 2-Hose, 3-Shuttle valve, 4-Right angle joint, 5-Straight-through joint, 6-Transition joint, 71-Limit channel, 72-Anti-collision rubber block, 73-Mounting plate, 74-Upper pressure plate, 75-Lower pressure plate, 76-First oblong hole, 77-First screw, 8-Machine tool spindle, 81-Spindle box, 82-Mounting base, 83-Support rod, 84-Tool-changing cylinder, 85-Tool-changing sleeve, 86-Bracket, 87-Back plate, 88-Third oblong hole, 89-Third screw. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Components or structures not limited in this invention employ conventional techniques in the art.

[0021] The mounting structure of the universal rotary joint of the embodiment, after being used on an existing machine tool spindle, is shown in the figure below. Figures 1-4 As shown. The mounting structure of this universal rotary joint includes a rotary joint 1, a hose 2, a shuttle valve 3, and a hose limiting mechanism. The rotary joint 1 is vertically fixed to the tail end of the machine tool spindle 8 via a threaded connection. The hose 2 is horizontally positioned, with one end connected to the rotary joint 1 via a right-angle connector 4 and a straight connector 5, and the other end connected to the shuttle valve 3 via an transition connector 6. A spindle box 81 is located on the outside of the machine tool spindle 8, and a mounting base 82 is fixed to the upper side of the spindle box 81. Four screws are fixed to the upper side of the mounting base 82 via a threaded connection. Four support rods 83 are fixed to the upper side of the four support rods 83 by threaded connection. The top of the knife-cutting sleeve 85 is fixedly connected to the knife-cutting cylinder 84. The installation position of the rotary joint 1 is located inside the knife-cutting sleeve 85. The hose limiting mechanism is set on the mounting base 82. The hose limiting mechanism is provided with a limiting channel 71. Anti-collision rubber blocks 72 are provided on the left and right sides of the limiting channel 71. The height of the limiting channel 71 is less than the outer diameter of the hose 2, and the width of the limiting channel 71 is greater than the outer diameter of the hose 2. The hose 2 passes through the limiting channel 71.

[0022] In this embodiment, the hose limiting mechanism includes a mounting plate 73, an upper pressure plate 74, and a lower pressure plate 75. The mounting plate 73 is fixed to the upper side of the mounting base 82. The upper pressure plate 74 and the lower pressure plate 75 are fixed to the mounting plate 73 at intervals. Two anti-collision rubber blocks 72 are fixed to the lower side of the upper pressure plate 74 at intervals. The upper pressure plate 74, the lower pressure plate 75, and the two anti-collision rubber blocks 72 form a limiting channel 71.

[0023] In this embodiment, the upper pressure plate 74 and the mounting plate 73 are connected by two first screws 77. The upper pressure plate 74 has two first oblong holes 76, with the major axis of each first oblong hole 76 along the vertical direction. Each first oblong hole 76 is used to pass through one first screw 77. The vertical position of the upper pressure plate 74 is adjustable. The mounting plate 73 is connected to the upper side of the mounting base 82 by two second screws (not shown in the figure). The mounting plate 73 has two second oblong holes (not shown in the figure), with the major axis of each second oblong hole along the horizontal direction. Each second oblong hole 77 is used to pass through one first screw 77. The waist-shaped hole is used to pass through a second screw, and the left and right positions of the mounting plate 73 are adjustable; a bracket 86 is fixed on one side of the spindle box 81, and a back plate 87 is mounted on the bracket 86. The shuttle valve 3, the back plate 87 and the bracket 86 are connected by two third screws 89. The bracket 86 has two sets of third waist-shaped holes 88. Each set of third waist-shaped holes 88 includes two third waist-shaped holes 88 that are opposite each other. The long axis of each third waist-shaped hole 88 is along the front and back direction. Each set of third waist-shaped holes 88 is used to pass through a third screw 89, and the front and back positions of the shuttle valve 3 are adjustable.

[0024] Installation process of rotary joint 1:

[0025] 1) Secure the outer shell of the rotary joint 1 with a tool. First, assemble the rotary joint 1, right-angle joint 4, straight-through joint 5 and hose 2. Then, thread the rotary joint 1 to the tail end of the machine tool spindle 8.

[0026] 2) Loosen the two second screws, adjust the left and right position of the mounting plate 73, and then tighten the two second screws; loosen the two first screws 77, adjust the up and down position of the upper pressure plate 74, and then tighten the two first screws 77; loosen the two third screws 89, adjust the front and back position of the shuttle valve 3, and then tighten the two third screws 89.

[0027] 3) After the top of the cutter sleeve 85 is fixedly connected to the cutter cylinder 84, the cutter sleeve 85 is placed on the outside of the rotary joint 1 from top to bottom. After the cutter sleeve 85 is installed, the cutter cylinder 84 is fixed to the four support rods 83.

[0028] The above installation process can prevent the outer shell of rotary joint 1 from exerting force and off-center load on its spindle and bearing, thus avoiding damage to rotary joint 1 during installation.

[0029] After the rotary joint 1 is installed, during use, the limiting channel 71 can restrict the vertical freedom of the hose 2 and provide a certain degree of freedom in the left and right directions, so that the hose 2 can withstand a certain degree of flexible deformation. At the same time, the anti-collision rubber blocks 72 set on the left and right sides of the limiting channel 71 play a limiting and buffering role in the left and right directions, thereby preventing the hose 2 from being constricted due to increased pressure and damaging the rotary joint 1 during use. It can also cope with the possible left and right movement of the hose 2 when the spindle motor rotates forward and backward, and reserve swing space for the left and right movement of the hose 2.

[0030] The aforementioned rotary joint 1 can remain free and almost unaffected by force during both installation and use, thus avoiding damage to the rotary joint 1. In addition, the inlet of the rotary joint 1 is a right-angle joint 4, which can reduce the direct impact of water on the rotary joint 1 and play a buffering role, further protecting the rotary joint 1. This results in the rotary joint 1 having a longer service life and a lower failure rate, adapting to complex working conditions, and being applicable to both mechanical spindles and electric spindles.

[0031] After the installation structure of the above-mentioned general-purpose rotary joint was put into use, on-site tests and after-sales follow-up feedback showed that the failure rate was low, which greatly saved the purchase cost, maintenance cost and after-sales maintenance time and manpower cost of the rotary joint.

Claims

1. A universal rotary joint mounting structure, characterized in that, The system includes a rotary joint, a hose, a shuttle valve, and a hose limiting mechanism. The rotary joint is vertically fixed to the tail end of the machine tool spindle via a threaded connection. The hose is horizontally positioned, with one end connected to the rotary joint via a right-angle connector and a straight connector, and the other end connected to the shuttle valve via a transition connector. A spindle box is located on the outer side of the machine tool spindle, and a mounting base is fixed to the upper side of the spindle box. The hose limiting mechanism is located on the mounting base and has a limiting channel. Anti-collision rubber blocks are provided on the left and right sides of the limiting channel. The height of the limiting channel is less than the outer diameter of the hose, and the width of the limiting channel is greater than the outer diameter of the hose. The hose passes through the limiting channel.

2. The mounting structure of a universal rotary joint according to claim 1, characterized in that, The hose limiting mechanism includes a mounting plate, an upper pressure plate, and a lower pressure plate. The mounting plate is fixed to the upper side of the mounting base. The upper pressure plate and the lower pressure plate are fixed to the mounting plate at intervals. Two anti-collision rubber blocks are fixed to the lower side of the upper pressure plate at intervals. The upper pressure plate, the lower pressure plate, and the two anti-collision rubber blocks form the limiting channel.

3. The mounting structure of a universal rotary joint according to claim 2, characterized in that, The upper pressure plate is connected to the mounting plate by a number of first screws. The upper pressure plate has a number of first waist-shaped holes, the long axis of each first waist-shaped hole is along the vertical direction, and each first waist-shaped hole is used to pass through one first screw. The vertical position of the upper pressure plate is adjustable.

4. The mounting structure of a universal rotary joint according to claim 3, characterized in that, The mounting plate is connected to the upper side of the mounting base by a number of second screws. The mounting plate has a number of second oblong holes, the long axis of each second oblong hole is along the left and right direction, and each second oblong hole is used to pass through a second screw. The left and right position of the mounting plate is adjustable.

5. The mounting structure of a universal rotary joint according to claims 1-4, characterized in that, A bracket is fixed on one side of the spindle box, and a back plate is installed on the bracket. The shuttle valve, the back plate, and the bracket are connected by a number of third screws. A number of third oblong holes are opened on the bracket. The long axis of each third oblong hole is along the front-back direction. Each third oblong hole is used to pass through one third screw. The front-back position of the shuttle valve is adjustable.

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