Double-channel pull rod for power clamp

Abstract

The utility model provides a double-channel pull rod for a power clamp, which relates to the field of power clamps and comprises an outer pipe, an inner pipe, a first connecting piece and a second connecting piece. The inner pipe is sleeved with the outer pipe; a gap exists between the outer wall of the inner pipe and the inner wall of the outer pipe; the first connecting piece is arranged at the left end of the outer pipe; the first connecting piece fixes the outer pipe and the inner pipe; the first connecting piece seals the gap; the second connecting piece is arranged at the right end of the outer pipe; the second connecting piece fixes the outer pipe and the inner pipe; the second connecting piece seals the gap; an air inlet is formed in the first connecting piece; the air inlet is communicated with the gap; a plurality of air outlets are formed in the second connecting piece; and the air outlet is communicated with the gap. The problems that in the prior art, a pull rod head, a pull bolt and a positioning block need to penetrate through a water through hole and a gas through hole need to penetrate through the pull rod head, a threaded sleeve, a chuck body and the positioning block, the machining process difficulty is large, and the cost is high can be solved, the water-gas double-channel structure is simplified, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of power clamps, in particular to a double-channel pull rod for power clamps. Background Art

[0002] With the deepening of automated processing, whether the tool cooling is sufficient, whether the chip removal is smooth, and whether the fixture positioning is reliable are the three most prominent factors. In order to make the chuck have the effects of tool cooling, chip flushing and detection positioning, the Chinese patent No. 201821633215.7 discloses a water and gas dual-channel structure of the chuck, including a sealing ring, a pull rod head, a pull bolt, a threaded sleeve, a chuck body, a fixing bolt, a positioning block, a water through hole, and an air through hole. The chuck body is connected with several fixing bolts, the chuck body is connected with a positioning block, the chuck body is connected with a threaded sleeve, and the left and right sides of the threaded sleeve are connected. A pull rod head is connected to the side, a pull bolt is connected inside the pull rod head, a pull bolt is connected inside the threaded sleeve, a positioning block is connected to the right side of the pull bolt, a water through hole passes through the pull rod head, the pull bolt and the positioning block, an air through hole passes through the pull rod head, the threaded sleeve, the chuck body and the positioning block, and sealing rings are provided between the pull rod head and the pull bolt, the pull bolt and the threaded sleeve, the chuck body and the threaded sleeve, the pull bolt and the positioning block, and the positioning block and the chuck body; when using the above-mentioned water-gas dual-path structure, the water through hole is provided to cool the tool and cut and flush the workpiece, and the air through hole is provided to detect the air tightness and thus detect whether the positioning is qualified.

[0003] However, when producing the above-mentioned water-gas dual-path structure, it is necessary to penetrate the pull rod head, pull bolt and positioning block to open a water hole, and it is necessary to penetrate the pull rod head, threaded sleeve, chuck body and positioning block to open an air hole, and sealing rings are set between the chuck body and the threaded sleeve, the pull bolt and the positioning block, and the positioning block and the chuck body. The processing technology is difficult and the cost is high. Utility Model Content

[0004] In response to the above-mentioned problems, the utility model provides a dual-channel pull rod for a power clamp, which can solve the problem that in the existing technology, when producing a water-gas dual-channel structure, it is necessary to penetrate the pull rod head, pull bolt and positioning block to open a water hole, and it is necessary to penetrate the pull rod head, threaded sleeve, chuck body and positioning block to open an air hole, and sealing rings are provided between the chuck body and the threaded sleeve, the pull bolt and the positioning block, and the positioning block and the chuck body. The processing technology is difficult and the cost is high, so the water-gas dual-channel structure is simplified and the production cost is reduced.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The utility model provides a dual-channel pull rod for a power clamp, comprising an outer tube, an inner tube, a first connecting piece and a second connecting piece;

[0007] The outer tube and the inner tube are arranged horizontally; the inner tube is sleeved in the outer tube; there is a gap between the outer wall of the inner tube and the inner wall of the outer tube;

[0008] The first connecting member is provided at the left end of the outer tube; the first connecting member fixes the outer tube and the inner tube; the first connecting member seals the gap;

[0009] The second connecting member is provided at the right end of the outer tube; the second connecting member fixes the outer tube and the inner tube; the second connecting member seals the gap;

[0010] An air inlet is provided on the first connecting member; the air inlet is communicated with the gap; a plurality of air outlets are provided on the second connecting member; the air outlets are communicated with the gap.

[0011] The dual-channel pull rod for a power clamp provided by the present invention is preferably provided with an inner cavity; a first opening is provided on the left side of the first connecting member; the first opening is communicated with the inner cavity; a second opening is provided on the right side of the first connecting member; the second opening is communicated with the inner cavity; a vertical cross-sectional area of ​​the first opening in the left-right direction is smaller than a vertical cross-sectional area of ​​the second opening in the left-right direction; a vertical cross-sectional area of ​​the second opening in the left-right direction is equal to a vertical cross-sectional area of ​​the inner cavity in the left-right direction;

[0012] The right end of the first connecting member is fixed to the left end of the outer tube; the left end of the inner tube is sleeved in the first connecting member; the gap is connected to the second opening; the inner wall of the first opening is fixed to the outer wall of the inner tube;

[0013] The air inlet is located on the side wall of the first connecting member.

[0014] The dual-channel pull rod for a power clamp provided by the present invention is preferably cylindrical in shape; the second connecting member is placed horizontally; a third opening is formed on the left side of the second connecting member; a fourth opening is formed on the right side of the second connecting member; the third opening is connected to the fourth opening; and the vertical cross-sectional area of ​​the third opening in the left-right direction is greater than the vertical cross-sectional area of ​​the fourth opening in the left-right direction.

[0015] The outer wall of the second connecting member is fixed to the inner wall of the outer tube; the right end of the inner tube is sleeved in the third opening; the outer wall of the inner tube is fixed to the inner wall of the third opening; the interior space of the inner tube is connected to the fourth opening;

[0016] The air outlets pass through the left end surface and the right end surface of the second connecting member; all the air outlets are distributed in a circular array with the axis of the second connecting member as the center.

[0017] The utility model provides a double channel pull rod for power clamp, preferably, the right end of first connecting piece is provided with first fixed part, first fixed part is annular, first fixed part is horizontally arranged, the right end of first connecting piece is fixed with the left end of first fixed part, second opening is round hole, the axis of first fixed part coincides with the axis of second opening, the inside diameter of first fixed part is greater than the diameter of second opening,

[0018] The left end of the outer tube is provided with a second fixing part; the second fixing part is annular; the second fixing part is vertically arranged; the right end of the second fixing part is fixed with the left end of the outer tube; the axis of the second fixing part coincides with the axis of the outer tube; the inner wall of the second fixing part is flush with the inner wall of the outer tube; the vertical cross-sectional area of the second fixing part in the left-right direction is less than the vertical cross-sectional area of the outer tube in the left-right direction;

[0019] The left end of the second fixing part is fixed with the right end of the first connecting piece; the outer wall of the second fixing part is fixed with the inner wall of the first fixing part.

[0020] The utility model provides a double channel pull rod for power clamp, preferably, a plurality of welding holes for welding second connecting piece and outer tube are set up on the outer tube side wall, all welding holes are evenly distributed with the axis of outer tube as center, welding hole and second connecting piece are on same straight line.

[0021] The utility model provides a double channel pull rod for power clamp, preferably, the vertical section of first connecting piece in left-right direction is annular, the outer wall of first connecting piece is provided with threaded interface,

[0022] The left end inner wall of the inner tube is provided with a threaded interface.

[0023] The utility model provides a double channel pull rod for power clamp, preferably, the inner wall of outer tube is provided with a limiting groove, the limiting groove is annular groove, the limiting groove is located outer tube right end, second connecting piece is located in the limiting groove, the left end of second connecting piece is fixed with the left side wall of limiting groove, the outer wall of second connecting piece is fixed with the groove bottom of limiting groove.

[0024] The utility model provides a double channel pull rod for power clamp, preferably, the groove bottom of limiting groove is provided with a tool withdrawal groove, the tool withdrawal groove is annular groove, the tool withdrawal groove is located the right side of second connecting piece.

[0025] The above technical scheme has the following advantages or beneficial effects:

[0026] The dual-channel pull rod for a power clamp provided by the utility model comprises an outer tube, an inner tube, a first connecting piece and a second connecting piece; the inner tube is sleeved inside the outer tube, and there is a gap between the outer wall of the inner tube and the inner wall of the outer tube, water is transmitted in the inner tube, and compressed air is transmitted in the gap, thereby realizing the simultaneous transmission of water and compressed air; further, in order to distinguish the transmission channels of water and compressed air and fix the outer tube and the inner tube, the first connecting piece is arranged at the left end of the outer tube, the first connecting piece fixes the outer tube and the inner tube, and the first connecting piece seals the left side of the gap; the second connecting piece is arranged at the right end of the outer tube, the second connecting piece fixes the outer tube and the inner tube, and the second connecting piece seals the right side of the gap, thereby preventing water and compressed air from mixing into the same channel while fixing the outer tube and the inner tube;

[0027] In the prior art, when opening a water-gas dual-path structure, it is necessary to penetrate the pull rod head, pull bolt and positioning block to open a water hole, and it is necessary to penetrate the pull rod head, threaded sleeve, chuck body and positioning block to open an air hole, and sealing rings are set between the chuck body and the threaded sleeve, the pull bolt and the positioning block, and the positioning block and the chuck body. The processing technology of the above-mentioned water-gas dual-path structure is difficult and the production cost is high; the dual-channel pull rod for the power clamp provided by the utility model only uses an inner tube sleeve to be set in the outer tube, and the first connecting member and the second connecting member to fix the outer tube and the inner tube, water is transmitted in the inner tube, and compressed air is transmitted in the gap between the outer tube and the inner tube. Compared with the prior art process of penetrating holes and setting multiple sealing rings, a simplified water-gas dual-path structure can be achieved, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention and its features, features, configurations, and advantages will become more apparent upon reading the detailed description of the following non-limiting embodiments with reference to the accompanying drawings. Like reference numerals indicate like parts throughout the drawings. The drawings are not drawn to scale, with emphasis placed on illustrating the subject matter of the present invention.

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of a dual-channel pull rod for a power clamp provided in Example 1 of the present utility model.

[0030] Figure 2 This is a right-side structural schematic diagram of a dual-channel pull rod for a power clamp provided in Example 1 of the present utility model.

[0031] Figure 3 This is a schematic top view of the structure of a dual-channel pull rod for a power clamp provided in Example 1 of the present utility model.

[0032] Figure 4 This is a schematic diagram of the main cross-sectional structure of a dual-channel pull rod for a power clamp provided in Example 1 of the present utility model. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0034] Example 1:

[0035] like Figures 1 to 4 As shown, a dual-channel pull rod for a power clamp provided by Example 1 of the present utility model includes an outer tube 1, an inner tube 2, a first connecting member 3 and a second connecting member 4;

[0036] The outer tube 1 and the inner tube 2 are arranged horizontally; the inner tube 2 is sleeved inside the outer tube 1; there is a gap between the outer wall of the inner tube 2 and the inner wall of the outer tube 1;

[0037] The first connecting member 3 is provided at the left end of the outer tube 1; the first connecting member 3 fixes the outer tube 1 and the inner tube 2; the first connecting member 3 seals the gap;

[0038] The second connecting member 4 is provided at the right end of the outer tube 1; the second connecting member 4 fixes the outer tube 1 and the inner tube 2; the second connecting member 4 seals the gap;

[0039] An air inlet 31 is formed on the first connecting member 3 ; the air inlet 31 is communicated with the gap; a plurality of air outlets 41 are formed on the second connecting member 4 ; the air outlets 41 are communicated with the gap.

[0040] When using the dual-channel pull rod for a power clamp provided in Example 1 of the utility model, the left end of the outer tube 2 is sleeved in the hollow rotary cylinder, and the right end of the outer tube 2 is sleeved in the hollow chuck; water enters from the left end of the inner tube 2, is transmitted in the inner tube 2, and is discharged from the right end of the inner tube 2; compressed air enters from the air inlet 31, is transmitted in the gap between the outer tube 1 and the inner tube 2, and is discharged from the air outlet 41; the discharged water and compressed air cool the tool and clean the waste chips ground from the workpiece by the tool.

[0041] The dual-channel pull rod for a power clamp provided in Example 1 of the present invention includes an outer tube 1, an inner tube 2, a first connecting member 3 and a second connecting member 4; the inner tube 2 is sleeved in the outer tube 1, and there is a gap between the outer wall of the inner tube 2 and the inner wall of the outer tube 1, water is transmitted in the inner tube 2, and compressed air is transmitted in the gap, thereby realizing the simultaneous transmission of water and compressed air; further, in order to distinguish the transmission channels of water and compressed air and fix the outer tube 1 and the inner tube 2, the first connecting member 3 is arranged at the left end of the outer tube 1, the first connecting member 3 fixes the outer tube 1 and the inner tube 2, and the first connecting member 3 seals the left side of the gap; the second connecting member 4 is arranged at the right end of the outer tube 1, the second connecting member 4 fixes the outer tube 1 and the inner tube 2, and the second connecting member 4 seals the right side of the gap, thereby preventing water and compressed air from mixing into the same channel while fixing the outer tube 1 and the inner tube 2;

[0042] The prior art needs to pass through the pull rod head, the pull bolt and the positioning block when opening the water through hole, and needs to pass through the pull rod head, the threaded sleeve, the chuck body and the positioning block when opening the gas through hole, and sealing rings are arranged between the chuck body and the threaded sleeve, the pull bolt and the positioning block and the positioning block and the chuck body, the machining process of the above-mentioned water and gas double passage structure is difficult, and the production cost is high; the double-channel pull rod for the power clamp provided by the embodiment 1 of the utility model, only adopts that the inner tube 2 is sleeved in the outer tube 1, the first connecting piece 3 and the second connecting piece 4 are used to fix the outer tube 1 and the inner tube 2, water is transmitted in the inner tube 2, and compressed air is transmitted in the gap between the outer tube 1 and the inner tube 2, compared with the process of penetrating the opening and arranging multiple sealing rings in the prior art, the water and gas double passage structure can be simplified, and therefore the production cost is reduced.

[0043] As shown in Figure 4 The utility model embodiment 1 provides a double-channel pull rod for power clamp, preferably, the first connecting piece 3 is provided with inner cavity, the left side of first connecting piece 3 is opened with first opening 32, first opening 32 is linked with inner cavity, the right side of first connecting piece 3 is opened with second opening 33, second opening 33 is linked with inner cavity, because the vertical section area of first opening 32 in left and right directions is less than the vertical section area of second opening 33 in left and right directions, the vertical section area of second opening 33 in left and right directions is equal to the vertical section area of inner cavity in left and right directions, therefore first opening 32 is less than second opening 33,

[0044] In order to realize that the outer tube 1 and the inner tube 2 are fixed by the first connecting piece 3, the right end of the first connecting piece 3 is fixed with the left end of the outer tube 1, the inner tube 2 passes through the first opening 32 and the second opening 33, the left end of the inner tube 2 is sleeved in the first connecting piece 3, the gap is communicated with the second opening 33, and the inner wall of the first opening 32 is fixed with the outer wall of the inner tube 2, because the first opening 32 is less than the second opening 33, and the vertical section area of the second opening 33 in left and right directions is equal to the vertical section area of the inner cavity in left and right directions, when the inner wall of the first opening 32 is fixed with the outer wall of the inner tube 2, there is a gap between the outer wall of the inner tube 2 and the inner cavity of the first connecting piece 3, if the right end of the first connecting piece 3 is fixed with the left end of the outer tube 1, the gap is communicated with the gap, and the compressed gas can enter the gap from the gap between the inner cavity and the inner tube 2, so that the compressed air transmission is realized,

[0045] Further, in order to avoid that water and compressed air are mixed when entering from the same side, the air inlet 31 is arranged on the side wall of the first connecting piece 3.

[0046] As shown in Figure 4As shown, in the dual-channel pull rod for a power clamp provided in Example 1 of the present invention, preferably, the second connecting member 4 is cylindrical; the second connecting member 4 is placed horizontally; a third opening 42 is formed on the left side of the second connecting member 4; a fourth opening 43 is formed on the right side of the second connecting member 4; the third opening 42 and the fourth opening 43 are connected; the vertical cross-sectional area of ​​the third opening 42 in the left-right direction is larger than the vertical cross-sectional area of ​​the fourth opening 43 in the left-right direction;

[0047] In order to achieve the fixation of the outer tube 1 and the inner tube 2 by the second connecting member 4, the outer wall of the second connecting member 4 is fixed to the inner wall of the outer tube 1, the right end of the inner tube 2 is sleeved in the third opening 42, and the outer wall of the inner tube 2 is fixed to the inner wall of the third opening 42; because the third opening 42 and the fourth opening 43 are connected, the internal space of the inner tube 2 is connected to the fourth opening 43. When water is transmitted in the inner tube 2, the water is discharged from the right end of the inner tube 2 to reach the third opening 42. The third opening 42 and the fourth opening 43 are connected, and the water can be discharged from the fourth opening 43.

[0048] Furthermore, since the outer wall of the second connecting member 4 is fixed to the inner wall of the outer tube 1, the air outlet 41 can only be set on the end face of the second connecting member 4. The air outlet 41 passes through the left end face and the right end face of the second connecting member 4, so that the air outlet 41 connects the gap and the external space of the outer tube 1, so that the compressed air can eliminate the gap; in order to effectively utilize the cleaning ability of the compressed air, all the air outlets 41 are distributed in a circular array with the axis of the second connecting member 4 as the center, so that the compressed air can effectively clean the debris on the workpiece.

[0049] like Figures 3 and 4 As shown, the dual-channel pull rod for a power clamp provided by Example 1 of the present invention preferably has a first fixing member 34 provided at the right end of the first connecting member 3; the first fixing member 34 is annular; the first fixing member 34 is arranged horizontally; the right end of the first connecting member 3 is fixed to the left end of the first fixing member 34; the second opening 33 is a circular hole, the axis of the first fixing member 34 coincides with the axis of the second opening 33, the inner diameter of the first fixing member 34 is larger than the diameter of the second opening 33, and the inner side wall of the first fixing member 34 forms a step with the right end surface of the first connecting member 3;

[0050] A second fixing member 11 is provided at the left end of the outer tube 1; the second fixing member 11 is annular; the second fixing member 11 is arranged vertically; the right end of the second fixing member 11 is fixed to the left end of the outer tube 1; the axis of the second fixing member 11 coincides with the axis of the outer tube 1, the inner wall of the second fixing member 11 is flush with the inner wall of the outer tube 1, the vertical cross-sectional area of ​​the second fixing member 11 in the left-right direction is smaller than the vertical cross-sectional area of ​​the outer tube 1 in the left-right direction, and the outer wall of the second fixing member 11 forms a step with the left end face of the outer tube 1;

[0051] In order to seal the connection between the first connecting member 3 and the outer tube 1 and prevent compressed air from escaping from the connection between the first connecting member 3 and the outer tube 1, the left end of the second fixing member 11 is fixed to the right end of the first connecting member 3, and the outer wall of the second fixing member 11 is fixed to the inner wall of the first fixing member 34. Compared with only fixing the right end of the first connecting member 3 and the left end of the outer tube 1, setting two fixed sealing points can reduce the probability of compressed air escape and improve the airtightness between the first connecting member 3 and the outer tube 1.

[0052] like Figure 1 and Figure 3 As shown, the dual-channel pull rod for the power clamp provided in Example 1 of the utility model is preferably provided with a plurality of welding holes 12 for welding the second connecting member 4 and the outer tube 1 on the side wall of the outer tube 1 in order to fix the second connecting member 4 to the inner side of the outer tube 1; the welding holes 12 are on the same straight line as the second connecting member 4, and if the welding holes 12 are facing upward, the outer wall of the second connecting member 4 is located below the welding holes 12; all the welding holes 12 are evenly distributed with the axis of the outer tube 1 as the center, and welding is performed with a welding gun at the welding holes 12 at the place where the outer tube 1 and the second connecting member 4 are in contact, so that the outer tube 1 and the second connecting member 4 can be tightly fixed.

[0053] The dual-channel pull rod for a power clamp provided in Example 1 of the present invention is preferably configured such that, in order to facilitate assembly of the dual-channel pull rod into a hollow rotary oil cylinder, the vertical cross-section of the first connecting member 3 in the left-right direction is annular, and a threaded interface is provided on the outer wall of the first connecting member 3. The first connecting member 3 is sleeved in the hollow rotary oil cylinder and fixed by a threaded connection.

[0054] Furthermore, when the first connecting member 3 is sleeved in the hollow rotary cylinder, the left end of the inner tube 2 extends out of the hollow rotary cylinder, and a threaded interface is provided on the inner wall of the left end of the inner tube 2 for connecting a pipe joint, which is connected to a hose for transporting water.

[0055] like Figure 4As shown, the double-channel pull rod for the power clamp provided by Example 1 of the present invention is preferably smooth because the inner wall of the outer tube 1 is smooth. When the second connecting member 4 is assembled into the outer tube 1, the second connecting member 4 is easy to slide in the outer tube 1, and the second connecting member 4 cannot be placed in the accurate position of the outer tube 1. In order to facilitate the assembly of the double-channel pull rod, a limiting groove 13 is provided on the inner wall of the outer tube 1; the limiting groove 13 is located at the right end of the outer tube 1; the limiting groove 13 is an annular groove, and the left side wall of the limiting groove 13 forms a step with the inner wall of the outer tube 1. The groove of the limiting groove 13 The bottom extends to the right end of the outer tube 1, that is, the limiting groove 13 has no right side wall. When assembling the second connecting member 4, the second connecting member 4 can be placed from the right end of the outer tube 1, and the left end of the second connecting member 4 contacts the left side wall of the limiting groove 13 to stop, so that the second connecting member 4 stays in the correct assembly position; when the second connecting member 4 is fixed to the outer tube 1, the second connecting member 4 is located in the limiting groove 13; the left end of the second connecting member 4 is fixed to the left side wall of the limiting groove 13; the outer wall of the second connecting member 4 is fixed to the bottom of the limiting groove 13.

[0056] like Figure 4 As shown, the dual-channel pull rod for the power clamp provided in Example 1 of the utility model is preferably provided with a tool retreat groove 131 at the bottom of the tool retreat groove 13 in order to precisely process the limit groove 13 so that the outer wall of the second connecting member 4 can be close to the bottom of the limit groove 13; the tool retreat groove 131 is an annular groove; the tool retreat groove 131 is located on the right side of the second connecting member 4.

[0057] To sum up, the dual-channel pull rod for the power clamp provided by the present invention can solve the problem that when producing the water-gas dual-channel structure, the water hole needs to be opened through the pull rod head, pull bolt and positioning block, and the air hole needs to be opened through the pull rod head, threaded sleeve, chuck body and positioning block, and sealing rings are provided between the chuck body and the threaded sleeve, the pull bolt and the positioning block, and the positioning block and the chuck body, and the processing technology is difficult and the cost is high. It can simplify the water-gas dual-channel structure and reduce production costs.

[0058] Those skilled in the art should understand that they can implement the above-mentioned variations by combining the existing technology and the above-mentioned embodiments, which will not be described in detail here. Such variations do not affect the essence of the present invention and will not be described in detail here.

[0059] The preferred embodiments of the present application are described above. It should be understood that the present application is not limited to the specific embodiments described above, wherein the devices and structures not described in detail should be understood as being implemented in the ordinary way in the art; any person skilled in the art can make many possible changes and modifications to the technical solutions of the present application without departing from the spirit of the present application, or modify equivalent embodiments of equivalent changes, which does not affect the essential content of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the technical solutions of the present application, still belongs to the scope of protection of the technical solutions of the present application.

Claims

1. A dual-channel pull rod for a power clamp, characterized in that: comprising an outer tube, an inner tube, a first connecting piece and a second connecting piece; The outer tube and the inner tube are arranged horizontally; the inner tube is sleeved in the outer tube; there is a gap between the outer wall of the inner tube and the inner wall of the outer tube; The first connecting member is provided at the left end of the outer tube; the first connecting member fixes the outer tube and the inner tube; the first connecting member seals the gap; The second connecting member is provided at the right end of the outer tube; the second connecting member fixes the outer tube and the inner tube; the second connecting member seals the gap; An air inlet is provided on the first connecting member; the air inlet is communicated with the gap; a plurality of air outlets are provided on the second connecting member; the air outlets are communicated with the gap.

2. The dual-channel pull rod for a power clamp according to claim 1, characterized in that: The first connecting member is provided with an inner cavity; a first opening is formed on the left side of the first connecting member; the first opening is communicated with the inner cavity; a second opening is formed on the right side of the first connecting member; the second opening is communicated with the inner cavity; a vertical cross-sectional area of ​​the first opening in the left-right direction is smaller than a vertical cross-sectional area of ​​the second opening in the left-right direction; a vertical cross-sectional area of ​​the second opening in the left-right direction is equal to a vertical cross-sectional area of ​​the inner cavity in the left-right direction; The right end of the first connecting member is fixed to the left end of the outer tube; the left end of the inner tube is sleeved in the first connecting member; the gap is connected to the second opening; the inner wall of the first opening is fixed to the outer wall of the inner tube; The air inlet is located on the side wall of the first connecting member.

3. The dual-channel pull rod for a power clamp according to claim 1, characterized in that: The second connecting member is cylindrical; the second connecting member is placed horizontally; a third opening is formed on the left side of the second connecting member; a fourth opening is formed on the right side of the second connecting member; the third opening and the fourth opening are connected; and a vertical cross-sectional area of ​​the third opening in the left-right direction is greater than a vertical cross-sectional area of ​​the fourth opening in the left-right direction; The outer wall of the second connecting member is fixed to the inner wall of the outer tube; the right end of the inner tube is sleeved in the third opening; the outer wall of the inner tube is fixed to the inner wall of the third opening; the interior space of the inner tube is connected to the fourth opening; The air outlets pass through the left end surface and the right end surface of the second connecting member; all the air outlets are distributed in a circular array with the axis of the second connecting member as the center.

4. The dual-channel pull rod for a power clamp according to claim 2, characterized in that: A first fixing member is provided at the right end of the first connecting member; the first fixing member is annular; the first fixing member is arranged horizontally; the right end of the first connecting member is fixed to the left end of the first fixing member; the second opening is a circular hole; the axis of the first fixing member coincides with the axis of the second opening; the inner diameter of the first fixing member is larger than the diameter of the second opening; A second fixing member is provided at the left end of the outer tube; the second fixing member is annular; the second fixing member is vertically arranged; the right end of the second fixing member is fixed to the left end of the outer tube; the axis of the second fixing member coincides with the axis of the outer tube; the inner wall of the second fixing member is flush with the inner wall of the outer tube; the vertical cross-sectional area of ​​the second fixing member in the left-right direction is smaller than the vertical cross-sectional area of ​​the outer tube in the left-right direction; The left end of the second fixing member is fixed to the right end of the first connecting member; the outer wall of the second fixing member is fixed to the inner wall of the first fixing member.

5. The dual-channel pull rod for a power clamp according to claim 3, characterized in that: The side wall of the outer tube is provided with a plurality of welding holes for welding the second connecting piece and the outer tube; all the welding holes are evenly distributed with the axis of the outer tube as the center; and the welding holes and the second connecting piece are in the same straight line.

6. The dual-channel pull rod for a power clamp according to claim 1, characterized in that: The vertical cross-section of the first connecting member in the left-right direction is annular; the outer wall of the first connecting member is provided with a threaded interface; The inner wall of the left end of the inner tube is provided with a threaded interface.

7. The dual-channel pull rod for a power clamp according to claim 4, characterized in that: A limiting groove is provided on the inner wall of the outer tube; the limiting groove is an annular groove; the limiting groove is located at the right end of the outer tube; the second connecting member is located in the limiting groove; the left end of the second connecting member is fixed to the left side wall of the limiting groove; the outer wall of the second connecting member is fixed to the bottom of the limiting groove.

8. The dual-channel pull rod for a power clamp according to claim 7, characterized in that: A tool retreat groove is provided at the bottom of the limiting groove; the tool retreat groove is an annular groove; and the tool retreat groove is located on the right side of the second connecting member.

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