Hidden liquid supply structure combining square tool apron and square tool bar of tool turret

By using a concealed coolant supply structure that combines the turret square tool holder with the square tool shank, the problems of coolant waste and high maintenance costs in traditional coolant supply methods are solved, achieving efficient cooling and sealing effects and extending the service life of the cutting tool.

CN223802160UActive Publication Date: 2026-01-16ZHEJIANG ZHONGZHIJINGGONG INTELLIGENT EQUIP CO LTD
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Patent Information

Application Number
CN202520223940.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-12
Publication Date
2026-01-16
Estimated Expiration
2035-02-12

AI Technical Summary

Technical Problem

Traditional coolant supply methods suffer from coolant waste, uneven cooling effects, and high equipment maintenance costs. In particular, insufficient cooling during high-load machining affects tool life.

Method used

The concealed coolant supply structure, which combines the square tool holder and square tool rod of the turret, achieves concealed coolant supply and sealing effect through the design of the cooling water inlet channel and the cutting tool cooling channel, combined with the elastic hollow plunger sealing assembly, ensuring cooling effect and reducing leakage.

Benefits of technology

It improves cooling efficiency, reduces coolant waste and equipment maintenance costs, extends the service life of cutting tools, and enhances the user experience.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The utility model relates to a hidden liquid supply structure combining a square tool apron and a square tool bar of a tool turret. The technical problem that an existing tool turret tool apron is poor in cooling effect is solved. Comprising a tool apron and a turning tool, the turning tool is provided with a tool bar and a tool bit, a turning tool fixing groove is formed in the upper end of the tool apron, and at least one cooling water inlet channel is formed in the tool apron; the tool bar is fixedly installed on any side in the turning tool fixing groove, and the turning tool cooling channel communicates with the cooling water inlet channel through the elastic hollow plunger sealing assembly. The hidden cooling device has the advantages that hidden cooling can be achieved through the cooling water inlet channel and the lane cooling channel, the cooling effect can be guaranteed, and meanwhile the equipment maintenance cost is reduced. The sealing effect between the tool apron water outlet hole and the cooling water inlet hole can be improved through the elastic hollow plunger sealing assembly, the phenomenon that cooling water leaks in the liquid supply process can be effectively prevented, the cooling effect is further improved, and waste of the cooling liquid is reduced.
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Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of tool turret liquid supply equipment, and particularly relates to a hidden liquid supply structure combined with a square tool holder and a square tool rod of a tool turret. BACKGROUND

[0002] In modern numerical control machine tools and machining centers, the cooling and lubrication of tools are one of the key factors to ensure machining precision, prolong tool life and improve production efficiency. The traditional cooling liquid supply mode usually directly sprays the cooling liquid to the tools and workpieces through external nozzles or pipelines. Although this mode is simple, it has problems such as waste of cooling liquid, limited field of view of the machining area and uneven cooling effect. Therefore, external pipelines are used to supply liquid to the turning tools on the market, which can effectively improve the cooling effect and reduce the waste of cooling liquid. However, the external pipeline structure is complex, which increases the manufacturing cost and the maintenance cost. Moreover, the flow and pressure of the cooling liquid are limited by the diameter and length of the external pipeline. In the high-load machining process, the cooling effect may be insufficient, which affects the service life of the tool. SUMMARY

[0003] The utility model aims at the above-mentioned problem, provides a hidden liquid supply structure combined with a square tool holder and a square tool rod of a tool turret.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: the utility model relates to a hidden liquid supply structure combined with a square tool holder and a square tool rod of a tool turret, which comprises a tool holder and a turning tool. The turning tool has a tool rod and a tool head. The upper end of the tool holder is provided with a turning tool fixing groove. At least one cooling water inlet channel is arranged in the tool holder. The turning tool is provided with a turning tool cooling channel. The tool rod is fixedly installed on any one side of the turning tool fixing groove, and the turning tool cooling channel is connected with the cooling water inlet channel through an elastic hollow plunger sealing assembly. The tool rod can be installed on any one side of the turning tool fixing groove according to the use requirement, which improves the user experience. The sealing effect between the cooling water inlet channel and the turning tool cooling channel can be ensured through the elastic hollow plunger sealing assembly, which can effectively prevent liquid leakage, ensure the cooling effect and improve the service life of the turning tool.

[0005] In the hidden liquid supply structure combined with a square tool holder and a square tool rod of a tool turret, the turning tool is a square turning tool, the tool holder is a square tool holder, the tool rod is in the shape of a rectangular column, one end of the tool rod extends to the outside of the turning tool fixing groove to form a tool head, and the width of the turning tool fixing groove is greater than the diameter of the tool rod, which facilitates the installation and fixation of the tool rod. Moreover, the length of the tool rod is greater than the length of the turning tool fixing groove, which facilitates the machining operation of the tool head.

[0006] In the hidden liquid supply structure of the combination of the square tool apron of the tool tower and the square tool rod, the number of the cooling water inlet channels is two, the cooling water inlet channels are T-shaped or L-shaped and symmetrically arranged on both sides of the apron with the center line of the apron as the center, the tool bit can be fixed on any side of the tool bit fixing groove, and the cooling water inlet channels are arranged on both sides of the apron, so that the tool bit can be arranged in the tool bit fixing groove on any side with the cooling water inlet channels arranged correspondingly, and the cooling effect of the tool bit is ensured.

[0007] In the hidden liquid supply structure of the combination of the square tool apron of the tool tower and the square tool rod, the cooling water inlet channel comprises a vertical channel vertically penetrating the apron, the upper end of the vertical channel is communicated with the apron water outlet hole at the bottom of the tool bit fixing groove, the lower end of the vertical channel is communicated with the bottom hole at the bottom of the apron, one side of the vertical channel is provided with a horizontal channel, one end of the horizontal channel is communicated with the side hole at the side of the apron, and the other end of the horizontal channel is communicated with one side of the vertical channel, the bottom of the apron is provided with an apron water inlet hole communicated with one side of the horizontal channel, the horizontal channel can be easily machined through the side hole, the apron water inlet hole can be communicated with the vertical channel through the horizontal channel, the cooling liquid flows into the horizontal channel through the apron water inlet hole, and the tool bit is cooled through the vertical channel and the apron water outlet hole, and the cooling effect is ensured.

[0008] In the hidden liquid supply structure of the combination of the square tool apron of the tool tower and the square tool rod, the number of the cooling water inlet channels is two, the cooling water inlet channels are T-shaped or L-shaped and symmetrically arranged on both sides of the apron with the center line of the apron as the center, the tool bit can be fixed on any side of the tool bit fixing groove, and the cooling water inlet channels are arranged on both sides of the apron, so that the tool bit can be arranged in the tool bit fixing groove on any side with the cooling water inlet channels arranged correspondingly, and the cooling effect of the tool bit is ensured.

[0009] In the hidden liquid supply structure of the combination of the square tool apron of the tool tower and the square tool rod, the tool bit cooling channel is arranged in the axial direction of the tool rod, one end of the tool bit cooling channel is communicated with the cooling water inlet hole at the lower side of the tool rod, the cooling water inlet hole is corresponded to and communicated with the apron water outlet hole, and the other end of the tool bit cooling channel is communicated with the cooling water outlet hole on the tool head.

[0010] In the hidden liquid supply structure of the combination of the square tool apron of the tool tower and the square tool rod, the elastic hollow plunger sealing assembly comprises a hollow plunger movably arranged in the apron water outlet hole and in a hollow state, the upper end of the hollow plunger abuts against the lower side of the tool rod and is communicated with the cooling water inlet hole, the lower end of the hollow plunger is provided with a pressing spring, one end of the pressing spring acts on the screw plug in the bottom hole, and according to the side of the tool bit fixing groove on which the tool bit is placed, the side hole and the bottom hole on the side are closed by the screw plug, so that the sealing effect is ensured and the liquid leakage is prevented.

[0011] In the hidden liquid supply structure of the combination of the square tool apron of the tool tower and the square tool rod, the diameter of the water outlet hole of the tool apron near one end of the cooling water inlet hole is smaller than the diameter of the other end, and the water outlet hole of the tool apron is provided with a limiting step, the hollow plunger is matched with the shape of the water outlet hole of the tool apron, and the circumferential outer side of the hollow plunger is provided with a limiting part abutting against the limiting step, so that the hollow plunger can be limited, and the stability of the hollow plunger arranged in the water outlet hole of the tool apron can be ensured.

[0012] In the hidden liquid supply structure of the combination of the square tool apron of the tool tower and the square tool rod, the tool apron is provided with a tool apron fixing groove, the tool rod is fixed on any one side of the tool apron fixing groove through a clamping block, the clamping block is provided with a plurality of vertically arranged first mounting holes, the bottom of the tool apron fixing groove is provided with a plurality of second mounting holes corresponding to the first mounting holes, and the two sides of the tool apron are provided with third mounting holes corresponding to the side of the clamping block, so that the clamping block can be fixed on the tool apron fixing groove through the first mounting holes and the second mounting holes, and the clamping effect between the clamping block and the tool rod can be improved through the third mounting holes, and the fixing effect of the tool rod is ensured.

[0013] In the hidden liquid supply structure of the combination of the square tool apron of the tool tower and the square tool rod, the two sides of the upper end of the tool apron are provided with mounting parts, the tool apron fixing groove is formed between the mounting parts, and a plurality of tool apron mounting holes are sequentially arranged on the mounting parts, so that the tool apron can be installed and fixed through the mounting parts and the tool apron mounting holes.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] 1. The hidden cooling can be realized through the cooling water inlet channel and the lane cooling channel, the cooling effect can be ensured, and the equipment maintenance cost is reduced.

[0016] 2. The sealing effect between the water outlet hole of the tool apron and the cooling water inlet hole can be improved through the elastic hollow plunger sealing assembly, the leakage of cooling water during the liquid supply process can be effectively prevented, the cooling effect is further improved, and the waste of cooling liquid is reduced.

[0017] 3. The tool holder can be fixed on any one side of the tool holder fixing groove according to the use requirement, and the installation stability of the tool holder in the tool holder fixing groove can be further improved through the clamping block. ACCURATE DRAWING

[0018] Figure 1 It is the structure schematic diagram of the utility model.

[0019] Figure 2 It is the structure sectional view of the utility model.

[0020] Figure 3 It is the structural explosion chart of the utility model.

[0021] Figure 4 It is the structural schematic view of the tool apron in the utility model.

[0022] Figure 5 It is the structural sectional view of the turning tool in the utility model.

[0023] In the drawing: tool apron 1, turning tool fixed groove 11, second mounting hole 111, cooling water inlet passage 12, vertical passage 121, tool apron water outlet hole 122, bottom hole 123, horizontal passage 124, side hole 125, tool apron water inlet hole 126, third mounting hole 13, turning tool 2, tool bar 21, cooling water inlet hole 211, tool head 22, cooling water outlet hole 221, turning tool cooling passage 23, elastic hollow plunger sealing assembly 3, hollow plunger 31, limiting part 311, top pressing spring 32, screw plug 4, limiting step 5, tool clamping block 6, first mounting hole 61, mounting part 7, tool apron mounting hole 71. DETAILED DESCRIPTION

[0024] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0025] As Figure 1 , Figure 2 , Figure 3 Indicated, this kind of hidden liquid supply structure of square tool apron and square tool bar combination, including tool apron 1 and turning tool 2, turning tool 2 has tool bar 21 and tool head 22, through tool bar 21 can be convenient for turning tool 2 to place in tool apron 1, tool apron 1 upper end has turning tool fixed groove 11, through turning tool fixed groove 11 can be convenient for turning tool 2 to be fixedly placed, tool apron 1 is equipped with at least one cooling water inlet passage 12, and turning tool 2 has turning tool cooling passage 23, through turning tool cooling passage 23 can be convenient for cooling water to turning tool 2 cooling, guarantee cooling effect, tool bar 21 is fixedly installed in the inside arbitrary side of turning tool fixed groove 11 and turning tool cooling passage 23 is connected with cooling water inlet passage 12 through elastic hollow plunger sealing assembly 3, and tool bar 21 can be installed in the arbitrary side of turning tool fixed groove 11 according to use demand, improve user use experience, and through elastic hollow plunger sealing assembly 3 can guarantee the sealing effect between cooling water inlet passage 12 and turning tool cooling passage 23, can effectively prevent liquid leakage, guarantee cooling effect, improve the service life of turning tool 2.

[0026] Specifically, the turning tool 2 is a square turning tool 2 and the tool holder 1 is a square tool holder 1, the tool rod 21 is in a rectangular column shape, one end of the tool rod 21 extends to the outside of the turning tool fixing groove 11 to form a tool head 22, and the width of the turning tool fixing groove 11 is greater than the diameter of the tool rod 21, so that the tool rod 21 can be conveniently installed and fixed, and the length of the tool rod 21 is greater than the length of the turning tool fixing groove 11, so that the tool head 22 can be conveniently machined.

[0027] The number of the cooling water inlet channels 12 is two, the cooling water inlet channels 12 are in a T-shaped structure or an L-shaped structure and are symmetrically arranged inside the tool holder 1 on both sides of the center line of the tool holder 1, the turning tool 2 can be fixed on any side of the turning tool fixing groove 11, and the cooling water inlet channels 12 are arranged on both sides of the tool holder 1, so that the turning tool 2 can be correspondingly arranged with the cooling water inlet channels 12 on any side of the turning tool fixing groove 11, and the cooling effect of the turning tool 2 is ensured.

[0028] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , the cooling water inlet channel 12 comprises a vertical channel 121 vertically penetrating the tool holder 1, the upper end of the vertical channel 121 is in communication with a tool holder water outlet hole 122 located at the bottom of the turning tool fixing groove 11, and the lower end of the vertical channel 121 is in communication with a bottom hole 123 located at the bottom of the tool holder 1, one side of the vertical channel 121 is provided with a horizontal channel 124, one end of the horizontal channel 124 is in communication with a side hole 125 located at the side of the tool holder 1, and the other end of the horizontal channel 124 is in communication with one side of the vertical channel 121, the bottom of the tool holder 1 is provided with a tool holder water inlet hole 126 in communication with one side of the horizontal channel 124, the side hole 125 can be machined to ensure that the tool holder water inlet hole 126 can be in communication with the vertical channel 121 through the horizontal channel 124, and the cooling liquid flows into the horizontal channel 124 through the tool holder water inlet hole 126 and cools the turning tool 2 through the vertical channel 121 and the tool holder water outlet hole 122, so that the cooling effect is ensured.

[0029] Further, the number of the tool holder water inlet hole 126, the tool holder water outlet hole 122, the bottom hole 123 and the side hole 125 is two, and the tool holder water inlet hole 126, the tool holder water outlet hole 122, the bottom hole 123 and the side hole 125 are symmetrically arranged on both sides of the tool holder 1 with the center line of the tool holder 1 as the center, one bottom hole 123 and one side hole 125 on the same side of the tool holder 1 among the two bottom holes 123 and the two side holes 125 are closed by the screw plug 4, and according to the side of the turning tool fixing groove 11 on which the turning tool 2 is placed, the side hole 125 and the bottom hole 123 on that side are selected to be closed by the screw plug 4, so that the sealing effect is ensured to prevent liquid leakage.

[0030] The tool cooling channel 23 is arranged along the axial direction of the tool bar 21 and is connected with the cooling water inlet hole 211 on the lower side of the tool bar 21, the cooling water inlet hole 211 is connected with the tool holder water outlet hole 122, and the other end of the tool cooling channel 23 is connected with the cooling water outlet hole 221 on the tool head 22. The cooling water in the tool holder water outlet hole 122 is transmitted to the cooling water outlet hole 221 through the tool cooling channel 23 through the cooling water inlet hole 211, which can ensure the cooling effect and improve the service life of the tool 2.

[0031] In combination Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown in the figure, the elastic hollow plunger sealing assembly 3 includes a hollow plunger 31 movably arranged in the tool holder water outlet hole 122 and in a hollow shape. The upper end of the hollow plunger 31 abuts against the lower side of the tool bar 21 and is connected with the cooling water inlet hole 211, and the lower end of the hollow plunger 31 is provided with a pressing spring 32, and one end of the pressing spring 32 acts on the screw plug 4 in the bottom hole 123. The screw plug 4 can support the pressing spring 32, and the pressing spring 32 can apply pressure to the hollow plunger 31 to ensure the stability of the hollow plunger 31 in the tool holder water outlet hole 122 and ensure the abutting and corresponding arrangement of the hollow plunger 31 and the cooling water inlet hole 211, which can effectively prevent the leakage of cooling water.

[0032] The diameter of one end of the tool holder water outlet hole 122 close to the cooling water inlet hole 211 is smaller than the diameter of the other end, and the tool holder water outlet hole 122 has a limiting step 5. The hollow plunger 31 is matched with the shape of the tool holder water outlet hole 122, and the circumferential outer side of the hollow plunger 31 is provided with a limiting portion 311 abutting against the limiting step 5. The limiting step 5 and the limiting portion 311 can limit the hollow plunger 31 to ensure the stability of the hollow plunger 31 arranged in the tool holder water outlet hole 122.

[0033] Specifically, the tool fixing groove 11 is arranged along the axial direction of the tool holder 1 at the upper end of the tool holder 1, and the tool bar 21 is fixed on one side of the tool fixing groove 11 through the clamping block 6. The clamping block 6 is provided with a plurality of first installation holes 61 arranged vertically, and the bottom of the tool fixing groove 11 is provided with a plurality of second installation holes 111 corresponding to the first installation holes 61, and the two sides of the tool holder 1 are respectively provided with third installation holes 13 corresponding to the side of the clamping block 6. The first installation holes 61 and the second installation holes 111 can facilitate the clamping block 6 to be fixed on the tool fixing groove 11, and the third installation holes 13 can improve the clamping effect between the clamping block 6 and the tool bar 21 to ensure the fixing effect of the tool bar 21.

[0034] In combination Figure 4As shown, the upper end of the tool holder 1 is provided with mounting portions 7 on both sides, and a tool fixing groove 11 is formed between the mounting portions 7, and a plurality of tool holder mounting holes 71 are sequentially arranged on the mounting portions 7, so that the tool holder 1 can be conveniently installed and fixed through the mounting portions 7 and the tool holder mounting holes 71.

[0035] The principle of the embodiment is that the tool 2 on the tool holder 1 can be cooled through the cooling water inlet channel 12, so as to improve the service life, the cooling water inlet channel 12 is connected with the tool cooling channel 23 through the cooling water inlet hole 211, so as to improve the cooling effect, and the sealing effect between the tool holder water outlet hole 122 and the cooling water inlet hole 211 in the cooling water inlet channel 12 can be improved through the elastic hollow plunger sealing assembly 3, so as to effectively prevent liquid leakage and further improve the cooling effect.

[0036] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0037] Although the terms such as tool holder 1, tool fixing groove 11, second mounting hole 111, cooling water inlet channel 12, vertical channel 121, tool holder water outlet hole 122, bottom hole 123, horizontal channel 124, side hole 125, tool holder water inlet hole 126, third mounting hole 13, tool 2, tool shank 21, cooling water inlet hole 211, tool head 22, cooling water outlet hole 221, tool cooling channel 23, elastic hollow plunger sealing assembly 3, hollow plunger 31, limiting portion 311, pressing spring 32, screw plug 4, limiting step 5, tool clamping block 6, first mounting hole 61, mounting portion 7, tool holder mounting hole 71 are used more frequently herein, but the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present application; any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. A hidden liquid supply structure for a square tool holder and a square tool bar, comprising a tool holder (1) and a turning tool (2), the turning tool (2) having a tool bar (21) and a tool head (22), the tool holder (1) having a turning tool fixing groove (11) at the upper end, characterized in that, The knife seat (1) is internally provided with at least one cooling water inlet channel (12), the turning tool (2) is internally provided with a turning tool cooling channel (23), the tool bar (21) is fixedly installed on any one side inside the turning tool fixing groove (11), and the turning tool cooling channel (23) is connected with the cooling water inlet channel (12) through the elastic hollow plunger sealing assembly (3).

2. The hidden liquid supply structure of a square tool holder combined with a square tool bar according to claim 1, characterized in that, The turning tool (2) is a square turning tool (2), the knife seat (1) is a square knife seat (1), the tool bar (21) is in a rectangular column shape, one end of the tool bar (21) extends to the outside of the turning tool fixing groove (11) to form a tool bit (22), and the width of the turning tool fixing groove (11) is greater than the diameter of the tool bar (21).

3. The hidden liquid supply structure of a square tool holder combined with a square tool bar according to claim 1 or 2, characterized in that, The number of the cooling water inlet channels (12) is two, the cooling water inlet channels (12) are in a T-shaped structure or an L-shaped structure, and the cooling water inlet channels (12) are symmetrically arranged on both sides of the knife seat (1) with the center line of the knife seat (1) as the center.

4. The hidden liquid supply structure of a square tool holder combined with a square tool bar according to claim 3, characterized in that, The cooling water inlet channel (12) comprises a vertical channel (121) vertically penetrating the knife seat (1), the upper end of the vertical channel (121) is connected with the knife seat water outlet hole (122) located at the bottom of the turning tool fixing groove (11), the lower end of the vertical channel (121) is connected with the bottom hole (123) located at the bottom of the knife seat (1), one side of the vertical channel (121) is provided with a horizontal channel (124), one end of the horizontal channel (124) is connected with the side hole (125) located at the side of the knife seat (1), and the other end of the horizontal channel (124) is connected with one side of the vertical channel (121), and the bottom of the knife seat (1) is provided with the knife seat water inlet hole (126) connected with one side of the horizontal channel (124).

5. The hidden liquid supply structure of a square tool holder combined with a square tool bar according to claim 4, characterized in that, The number of the knife seat water inlet hole (126), the knife seat water outlet hole (122), the bottom hole (123) and the side hole (125) is two, and the knife seat water inlet hole (126), the knife seat water outlet hole (122), the bottom hole (123) and the side hole (125) are symmetrically arranged on both sides of the knife seat (1) with the center line of the knife seat (1) as the center, and one bottom hole (123) and one side hole (125) located on the same side of the knife seat (1) are closed through the screw plug (4).

6. The hidden liquid supply structure of a square tool holder combined with a square tool bar according to claim 5, characterized in that, The turning tool cooling channel (23) is arranged in an axial direction along the tool bar (21), one end of the turning tool cooling channel (23) is connected with the cooling water inlet hole (211) located at the lower side of the tool bar (21), the cooling water inlet hole (211) corresponds to and is connected with the knife seat water outlet hole (122), and the other end of the turning tool cooling channel (23) is connected with the cooling water outlet hole (221) located on the tool bit (22).

7. The hidden liquid supply structure of a square tool holder combined with a square tool bar according to claim 6, characterized in that, The elastic hollow plunger sealing assembly (3) comprises a hollow plunger (31) movably arranged in the tool holder water outlet hole (122) and in a hollow shape, the upper end of the hollow plunger (31) abuts against the lower side of the tool bar (21) and communicates with the cooling water inlet hole (211), and the lower end of the hollow plunger (31) is provided with a pressing spring (32), and one end of the pressing spring (32) acts on the screw plug (4) located in the bottom hole (123).

8. The hidden liquid supply structure of a square tool holder combined with a square tool bar according to claim 6, characterized in that, The tool holder water outlet hole (122) has a smaller diameter at one end close to the cooling water inlet hole (211) than at the other end, and the tool holder water outlet hole (122) has a limiting step (5) therein, the hollow plunger (31) matches the shape of the tool holder water outlet hole (122), and the hollow plunger (31) is provided with a limiting portion (311) on the circumferential outer side and abuts against the limiting step (5).

9. The hidden liquid supply structure of a square tool holder combined with a square tool bar according to claim 1, characterized in that, The tool holder (1) is provided with a tool holder fixing groove (11) in the middle of the upper end in the axial direction, the tool bar (21) is fixed on one side in the tool holder fixing groove (11) through a tool clamping block (6), the tool clamping block (6) is provided with a plurality of vertical first mounting holes (61), the bottom of the tool holder fixing groove (11) is provided with a plurality of second mounting holes (111) corresponding to the first mounting holes (61), and the tool holder (1) is provided with a third mounting hole (13) corresponding to the side of the tool clamping block (6) on each side.

10. The hidden liquid supply structure of a square tool holder combined with a square tool bar according to claim 1, characterized in that, The upper end of the tool holder (1) is provided with a mounting portion (7) on each side, the tool holder fixing groove (11) is formed between the mounting portions (7), and a plurality of tool holder mounting holes (71) are sequentially arranged on the mounting portions (7).