Piston hole processing machine

Abstract

The present invention belongs to the technical field of automobile piston processing, and in particular relates to a piston hole processing machine, comprising: a support seat, a support frame is arranged at the bottom of the support seat; a support table, a support table is fixedly arranged in the middle of the upper end of the support seat; a feeding mechanism, a feeding mechanism is arranged at the upper end of the support seat and on both sides of the support table; a drilling mechanism, a drilling mechanism driven by the feeding mechanism is arranged on each feeding mechanism; a clamping mechanism, a clamping mechanism is arranged on the support table; wherein the clamping mechanism is located in the middle of the support table; the feeding mechanism comprises a servo slide, a support plate and a servo motor, the drilling mechanism comprises a driving motor, a chuck and a drill bit, and the drilling mechanism is arranged on the support plate of the feeding mechanism.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile piston processing, and in particular relates to a piston hole processing machine. Background Art

[0002] The engine is the power component of the car. The engine is mainly composed of a cylinder, a piston, a connecting rod, a crankshaft, a valve mechanism, a propeller reducer, a casing, etc. Among them, the piston is an important part of the engine. It is a reciprocating part in the engine cylinder block. The traditional piston cylinder has two axial holes, which are symmetrically arranged. The process steps of processing the piston are to first use a press-fit device to install the piston blank on the table of the drilling rig, and then use the drilling rig to drill the first axial hole on the cylinder of the piston blank, and then turn the piston blank 180°. After turning in place, use a press-fit device to install the piston blank on the table of the drilling rig, and then use the drilling rig to drill the second axial hole on the cylinder of the piston blank. When the two axial holes are processed, the piston blank is transferred to the grinding station of the grinder and fixed with a special fixture. The closed end face of the blank piston is ground by the grinder, and the finished piston is processed after grinding. However, although this method of processing pistons can process pistons, it still has the following defects: when drilling the second shaft hole, the piston blank needs to be re-fixed, which undoubtedly increases the cumulative positioning error, causing the two shaft holes to be asymmetrical, thereby reducing the machining accuracy of the shaft holes. Therefore, there is an urgent need for a processing device that can improve the piston processing efficiency and shaft hole processing accuracy. Summary of the invention

[0003] The purpose of the present invention is to provide a processing equipment for automobile piston shaft hole processing which has a simple structure, high cutting efficiency, high progress and ideal fixing effect in order to solve the above-mentioned technical problems.

[0004] In view of this, the present invention provides a piston hole processing machine, comprising:

[0005] A support seat, wherein a support frame is arranged at the bottom of the support seat;

[0006] A support platform is fixedly provided at the middle part of the upper end of the support seat;

[0007] A feeding mechanism is provided at the upper end of the support seat and on both sides of the support platform;

[0008] A drilling mechanism, wherein each feeding mechanism is provided with a drilling mechanism driven by the feeding mechanism;

[0009] A clamping mechanism is provided on the support platform;

[0010] The clamping mechanism is located in the middle of the support platform; the feeding mechanism includes a servo slide, a support plate and a servo motor, the drilling mechanism includes a driving motor, a chuck and a drill bit, and the drilling mechanism is arranged on the support plate of the feeding mechanism.

[0011] In the above technical solution, further, a placement hole penetrating the support platform and the support seat is provided in the middle of the support platform;

[0012] The clamping mechanism includes:

[0013] An outer clamping tube, which passes through the placement hole from the lower end of the support seat and abuts against and is fixedly connected to the support seat;

[0014] An inner support tube is arranged inside the outer clamping tube, and the inner support tube is fixedly connected to the outer clamping tube;

[0015] An upper end cover, which is arranged inward from the upper end of the outer clamping tube and is fixedly connected to the inner support tube;

[0016] An internal transmission assembly is provided between the outer clamping cylinder and the inner support cylinder;

[0017] The inner transmission component can squeeze the outer clamping tube to cause the diameter of the upper end of the outer clamping tube to expand.

[0018] In the above technical solution, further, the outer clamping cylinder includes, from bottom to top, sequentially connected:

[0019] An inner flange, the inner flange abuts against the bottom end surface of the support seat and is bolted to the support seat;

[0020] A clamping cylinder portion, a through clamping stepped hole is formed in the middle of the clamping cylinder portion, a deformation gap is formed between the clamping stepped hole and the placement hole, a plurality of uniformly distributed deformation grooves are extended downward from the upper end of the clamping cylinder portion, a clamping groove portion is formed on the outer wall of the upper end of the clamping cylinder portion, and a reinforcing sheet is formed inside the clamping groove portion;

[0021] The inner support tube includes the following connected in sequence from bottom to top:

[0022] The outer flange is coaxially arranged with the inner flange, and the end faces of the outer flange and the inner flange abut against each other and are fixedly connected;

[0023] An inner step portion, the inner step portion extends into the clamping step hole and cooperates with the clamping step hole;

[0024] The inner transmission assembly is arranged between the inner step portion and the clamping step hole, and a positioning edge is formed on the outer edge of the inner flange on one side of the bottom end face of the support seat, and a positioning groove matching the positioning edge is formed on the bottom end face of the support seat.

[0025] In the above technical solution, further, the clamping stepped hole includes the following arranged in sequence from bottom to top:

[0026] A lower sliding fitting hole, which is cylindrical and extends inwardly from the lower end of the clamping cylinder;

[0027] An upper clamping matching hole, wherein the upper clamping matching hole is a tapered surface with a decreasing diameter inwardly from the connection point of the lower sliding matching hole;

[0028] An upper receiving matching hole, which extends inward from the upper end of the clamping cylinder and communicates with the upper clamping matching hole;

[0029] The inner step portion includes the following parts which are arranged in sequence from bottom to top and whose diameters decrease gradually:

[0030] a first step portion, the first step portion being clearance-matched with the lower sliding matching hole;

[0031] A second step portion, the second step portion is located on the lower sliding matching hole and the connection with the upper clamping matching hole;

[0032] A third step portion, the third step portion extending to a position close to an upper end of the upper clamping matching hole;

[0033] The upper end cover abuts against the lower end surface of the upper receiving matching hole, and a connecting block extending into the upper clamping matching hole is formed at the lower end of the upper end cover, and the connecting block abuts against and is fixedly connected to the third step portion.

[0034] In the above technical solution, further, the internal transmission component includes:

[0035] An inner sliding extrusion cylinder is located in the lower sliding matching hole and the upper clamping matching hole, and is slidingly matched with the lower sliding matching hole and the upper clamping matching hole;

[0036] An inner floating ring is arranged in the inner groove of the inner sliding extrusion cylinder, and the inner floating ring drives the inner sliding extrusion cylinder to move;

[0037] An upper limit buffer rod, wherein a plurality of upper limit buffer rods are evenly distributed along the circumference and one end of the upper limit buffer rods abuts against the upper end cover and the other end abuts against the inner sliding extrusion cylinder;

[0038] The outer wall of the inner sliding extrusion cylinder is a two-section structure including a sliding cylinder part and a tapered extrusion part, the sliding cylinder part cooperates with the lower sliding matching hole, the extrusion part cooperates with the lower part of the upper clamping matching hole and squeezes the upper clamping matching hole when moving up and down, so that the upper part of the clamping cylinder part expands outward; the inner wall of the inner sliding extrusion cylinder is a stepped hole shape including a first hole part that is slidably matched with the first step part and has a height greater than the first step part, a second hole part is arranged in the first hole part, the bottom of the second hole part is abutted against the end face of the second step part, a third hole part that is slidably matched with the third step part is arranged at the bottom of the second hole part, and the inner floating ring is arranged between the bottom end face of the first hole part and the inner end face of the first step part; a plurality of threaded holes evenly distributed along the circumference are arranged in the middle part of the clamping cylinder part, the threaded holes and the deformation grooves are alternately distributed, a limiting screw is arranged on the threaded hole, and a limiting groove that is limited and matched with the limiting screw is arranged on the inner sliding extrusion cylinder.

[0039] In order to ensure a good resetting effect of the outer clamping tube, a number of upper limit buffer rods evenly distributed along the circumference and against the outer clamping tube can be arranged in the support platform; by drilling a stepped hole in the side wall of the support platform, the upper limit buffer rod is placed therein and a positioning nut is arranged outside the stepped hole to prevent the upper limit buffer rod from shifting.

[0040] In the above technical solution, further, the inner support cylinder also includes a hydraulic channel, the hydraulic channel includes a main channel penetrating from the outer flange into the first step portion inwardly and a plurality of side channels distributed circumferentially and connected to the main channel and extending from the inner end surface of the first step portion, a hydraulic cavity is formed between the lower end of the inner floating ring and the first hole portion and the first step portion, and the side channels are connected to the hydraulic cavity;

[0041] The inner floating ring includes:

[0042] The middle support ring is rectangular, and matching grooves are respectively arranged on the upper outer edge and the lower inner edge of the middle support ring;

[0043] The end support rings are provided on both sides of the middle support ring with end support rings floatingly connected to the middle support ring, and the end support rings are formed with downward pressure ribs extending into the matching grooves; the end support rings are provided with connecting through holes, the middle support rings are provided with floating connecting holes, and the end support rings are connected to the middle support rings through floating connecting bolts, wherein the floating connecting bolts are slidably matched with the connecting through holes and are threadedly connected with the floating connecting holes;

[0044] A floating seal assembly is provided in each matching groove, wherein the floating seal located at the upper end of the intermediate support ring is sealed with the first hole portion, and the floating seal located at the lower end of the intermediate support ring is sealed with the second step portion;

[0045] A sunken groove is formed on one side edge of the downward pressure rib of the end support ring.

[0046] The beneficial effects of the present invention are:

[0047] 1. The piston blank is fixed by a clamping mechanism and the holes are processed simultaneously by two drilling mechanisms, thereby improving the processing efficiency and processing accuracy;

[0048] 2. The coordination of the outer clamping tube, the inner support tube and the inner transmission assembly can further improve the stability of the clamping of the piston blank, thereby ensuring the processing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the structure of the present invention;

[0050] Figure 2 It is a partial cross-sectional schematic diagram of the present invention;

[0051] Figure 3 It is a schematic diagram of the structure of the outer clamping cylinder and the inner sliding extrusion cylinder in the present invention;

[0052] Figure 4 It is a structural schematic diagram of the upper limit buffer rod in the present invention;

[0053] Figure 5 It is a schematic diagram of the structure of the inner floating ring in the present invention;

[0054] Markings in the figure are as follows: 1-support seat, 2-support table, 3-feeding mechanism, 4-drilling mechanism, 5-placement hole, 6-upper end cover, 7-inner flange, 8-clamping cylinder, 9-clamping stepped hole, 9a-lower sliding matching hole, 9b-upper clamping matching hole, 9c-upper receiving matching hole, 10-deformation gap, 11-deformation groove, 12-clamping groove, 13-outer flange, 14-inner stepped portion, 14a-first stepped portion, 14b-second stepped portion, 14c-third stepped portion, 15-positioning edge, 16-inner sliding extrusion cylinder, 16a-first hole portion, 16b-second hole portion, 16c-third hole portion, 16d-extrusion portion, 17-threaded hole, 18-limit screw, 19-limit Position groove, 20-hydraulic channel, 21-middle support ring, 21a-matching groove, 22-end support ring, 22a-downward pressure rib, 23-inner sealing ring, 23a-outer sealing part, 23b-inner sealing part, 23c-inner inclined matching part, 23d-inner sealing rib, 24-outer sealing ring, 24a-outer inclined matching part, 24b-outer sealing rib, 25-support rod part, 26-inner sealing piston, 27-outer cylinder, 28-end sealing plug, 29-outer fixed cover, 30-inner return spring, 31-inner cylinder, 32-inner support block, 33-outer floating cavity, 34-inner floating plug, 35-outer return spring, 36-outer receiving hole, 37-auxiliary channel, 38-cover, 39-inner return cavity. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0056] Embodiment 1:

[0057] This embodiment provides a piston hole processing machine, comprising:

[0058] A support base 1, wherein a support frame is provided at the bottom of the support base 1;

[0059] A support platform 2 is fixedly provided at the middle of the upper end of the support seat 1;

[0060] Feeding mechanism 3, feeding mechanism 3 is respectively arranged at the upper end of the supporting seat 1 and on both sides of the supporting platform 2;

[0061] A drilling mechanism 4 is provided on each feeding mechanism 3 and driven by the feeding mechanism;

[0062] A clamping mechanism is provided on the support platform 2;

[0063] The clamping mechanism is located in the middle of the support table 2; the feeding mechanism 3 includes a servo slide, a support plate and a servo motor, the drilling mechanism 4 includes a drive motor, a chuck and a drill bit, and the drilling mechanism 4 is arranged on the support plate of the feeding mechanism 3.

[0064] In this embodiment, the upper end of the support seat 1 is used to place components in the equipment, and a plurality of support feet are arranged at the bottom of the support frame; the support platform 2 is used to place and limit the clamping mechanism, and the support platform 2 can be fixed on the support seat 1 by bolts; and the equipment clamps and fixes the piston blank through the clamping mechanism, and then drills holes on both sides of the piston clamped on the clamping mechanism at the same time through two feeding mechanisms 3, and completes the processing of two axial holes by one fixation, thereby improving the processing efficiency and ensuring the processing accuracy.

[0065] Embodiment 2:

[0066] This embodiment provides a piston hole processing machine, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0067] A placement hole 5 is provided in the middle of the support platform 2 and penetrates the support platform 2 and the support seat 1;

[0068] The clamping mechanism includes:

[0069] An outer clamping tube, which passes through the placement hole 5 from the lower end of the support base 1 and abuts against and is fixedly connected to the support base 1;

[0070] An inner support tube is arranged inside the outer clamping tube, and the inner support tube is fixedly connected to the outer clamping tube;

[0071] An upper end cover 6, which is arranged inward from the upper end of the outer clamping tube and is fixedly connected to the inner support tube;

[0072] An internal transmission assembly is provided between the outer clamping cylinder and the inner support cylinder;

[0073] The inner transmission component can squeeze the outer clamping tube to cause the diameter of the upper end of the outer clamping tube to expand.

[0074] In this embodiment, a support platform 2 extends from the upper end of the outer clamping cylinder, and the inner wall of the piston hole in the piston blank is clamped by the upper end of the outer clamping cylinder; the inner support cylinder is used to support the interior of the outer clamping cylinder, and the upper end cover 6 is used to close the interior of the outer clamping cylinder. The inner transmission component is operated to cause the diameter of the upper end of the outer clamping cylinder to expand, thereby fixing the piston blank in line, thereby ensuring good fixing strength for the piston blank to prevent the piston blank from slipping; and the outer clamping cylinder as a whole can be made of metal or alloy material with good elasticity.

[0075] Embodiment 3:

[0076] This embodiment provides a piston hole processing machine, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0077] The outer clamping cylinder includes the following connected in sequence from bottom to top:

[0078] An inner flange 7, the inner flange 7 abuts against the bottom end surface of the support base 1 and is bolted to the support base 1;

[0079] A clamping cylinder 8, a through clamping stepped hole 9 is formed in the middle of the clamping cylinder 8, a deformation gap 10 is formed between the clamping stepped hole 9 and the placement hole 5, and a plurality of uniformly distributed deformation grooves 11 are extended downward from the upper end of the clamping cylinder 8, and a clamping groove 12 is formed on the outer wall of the upper end of the clamping cylinder 8, and a holding sheet is formed inside the clamping groove 12;

[0080] The inner support tube includes the following connected in sequence from bottom to top:

[0081] An outer flange 13, the outer flange 13 is coaxially arranged with the inner flange 7, and the end faces of the outer flange 13 and the inner flange 7 are butted against and fixedly connected;

[0082] An inner stepped portion 14, the inner stepped portion 14 extends into the clamping stepped hole 9 and cooperates with the clamping stepped hole 9;

[0083] The inner transmission assembly is arranged between the inner step portion 14 and the clamping step hole 9, and a positioning edge 15 is formed on the outer edge of the inner flange 7 on one side of the bottom end face of the support seat 1, and a positioning groove cooperating with the positioning edge 15 is formed on the bottom end face of the support seat 1.

[0084] In this embodiment, the inner flange 7 can facilitate the fixation of the outer clamping sleeve and the support seat 1, and the positioning edge 15 arranged on the inner flange 7 cooperates with the positioning groove on the support seat 1 to play a good positioning role for the inner support cylinder and ensure the installation accuracy; the inner clamping cylinder 8 is used to clamp the piston blank, and the deformation groove 11 can prevent it from breaking when the inner transmission component causes the upper end diameter of the inner clamping cylinder 8 to expand, thereby ensuring the good structural strength of the clamping cylinder 8; the upper end outer wall of the clamping cylinder 8 is formed with a clamping groove 12 for abutting against the end face of the piston blank and facilitating the insertion of the clamping sheet into the piston hole of the piston blank; the deformation gap can provide a certain expansion space for the upper end of the clamping cylinder 8; the outer flange 13 is abutted against the inner flange 7, and the fixed bolts penetrate from the outside of the outer flange 13 and pass through the inner flange 7 to be fixedly connected to the support seat 1; the inner step 14 and the outer clamping cylinder cooperate to provide installation space for the inner transmission component.

[0085] Embodiment 4:

[0086] This embodiment provides a piston hole processing machine, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0087] The clamping stepped hole 9 includes the following components arranged in sequence from bottom to top:

[0088] A lower sliding fitting hole 9a, which is cylindrical and extends inwardly from the lower end of the clamping cylinder 8;

[0089] An upper clamping fitting hole 9b, wherein the upper clamping fitting hole 9b is a tapered surface with a decreasing diameter inwardly from the connection point of the lower sliding fitting hole 9a;

[0090] An upper receiving mating hole 9c, which extends inward from the upper end of the clamping cylinder 8 and communicates with the upper clamping mating hole 9b;

[0091] The inner stepped portion 14 includes the following parts which are arranged in sequence from bottom to top and whose diameters decrease gradually:

[0092] A first step portion 14a, the first step portion 14a is clearance-matched with the lower sliding fitting hole 9a;

[0093] A second step portion 14b, the second step portion 14b is located at the connection between the lower sliding matching hole 9a and the upper clamping matching hole 9b;

[0094] A third step portion 14c, the third step portion 14c extends to a position close to the upper end of the upper clamping matching hole 9b;

[0095] The upper end cover 6 abuts against the lower end surface of the upper receiving matching hole 9c and a connecting block extending into the upper clamping matching hole 9b is formed at the lower end of the upper end cover 6. The connecting block abuts against and is fixedly connected to the third step portion 14c.

[0096] In this embodiment, the setting of the lower sliding fitting hole 9a can facilitate the installation and fixation of the first step portion 14a and the internal transmission assembly; and the setting of the upper clamping fitting hole 9b promotes the expansion of the upper end of the clamping cylinder 8 under the action of the internal transmission assembly, and the setting of the upper fitting hole can control the thickness of the supporting plate, thereby ensuring the clamping effect of the clamping plate; the setting of the third step portion 14c is used for limiting and connecting the upper end cover 6.

[0097] Embodiment 5:

[0098] This embodiment provides a piston hole processing machine, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0099] The internal transmission components include:

[0100] The inner sliding extrusion cylinder 16 is located in the lower sliding matching hole 9a and the upper clamping matching hole 9b, and is slidingly matched with the lower sliding matching hole 9a and the upper clamping matching hole 9b;

[0101] An inner floating ring is provided in the inner groove of the inner sliding extrusion cylinder 16, and the inner floating ring drives the inner sliding extrusion cylinder 16 to move;

[0102] An upper limit buffer rod, a plurality of upper limit buffer rods are evenly distributed around the circumference and one end of the upper limit buffer rods abuts against the upper end cover 6 and the other end abuts against the inner sliding extrusion cylinder 16;

[0103] The outer wall of the inner sliding extrusion cylinder 16 is a two-stage structure including a sliding cylinder portion and a tapered extrusion portion 16d. The sliding cylinder portion cooperates with the lower sliding matching hole 9a, and the extrusion portion 16d cooperates with the lower part of the upper clamping matching hole 9b and squeezes the upper clamping matching hole 9b when moving up and down, so that the upper part of the clamping cylinder portion 8 expands outward; the inner wall of the inner sliding extrusion cylinder 16 is a stepped hole shape including a first hole portion 16a that is slidably matched with the first step portion 14a and has a height greater than the first step portion 14a, and a bottom portion 16a is provided in the first hole portion 16a and a second step portion 14a is provided. The end face of 4b abuts against the second hole portion 16b, and the bottom of the second hole portion 16b is provided with a third hole portion 16c that slides with the third step portion 14c, and the inner floating ring is arranged between the bottom end face of the first hole portion 16a and the inner end face of the first step portion 14a; a plurality of threaded holes 17 evenly distributed along the circumference are arranged in the middle part of the clamping cylinder 8, and the threaded holes 17 and the deformation grooves 11 are alternately distributed, and a limiting screw 18 is arranged on the threaded hole 17, and a limiting groove 19 that limits the limiting screw 18 is arranged on the inner sliding extrusion cylinder 16.

[0104] In order to ensure a good resetting effect of the outer clamping tube, a number of upper limit buffer rods evenly distributed along the circumference and against the outer clamping tube can be arranged inside the support platform 2; by drilling a stepped hole in the side wall of the support platform 2, the upper limit buffer rod is placed therein and a positioning nut is arranged outside the stepped hole to prevent the upper limit buffer rod from shifting.

[0105] In this embodiment, the inner sliding extrusion sleeve is driven upward by the upward movement of the inner floating ring. During the upward movement of the extrusion portion 16d of the inner extrusion sleeve, the upper clamping matching hole 9b is squeezed, causing the upper part of the clamping cylinder 8 to expand outward, thereby achieving the function of clamping the piston; and the upper limit buffer rod provided can play the role of buffering and limiting the inner sliding extrusion cylinder 16, avoiding excessive upward displacement of the inner sliding extrusion cylinder 16, and facilitating the reset of the inner floating ring and the inner sliding extrusion cylinder 16 when the inner floating ring does not apply force to the inner sliding extrusion cylinder 16; and the first hole portion 16a of the inner sliding extrusion cylinder 16 and the first step portion 14a slide and cooperate from And it can prevent the inner sliding extrusion cylinder 16 from shifting when the inner sliding extrusion cylinder 16 is displaced; the inner floating ring is arranged between the second hole portion 16b and the first step portion 14a, and the third hole portion 16c and the third step portion 14c are slidably matched to further ensure the smooth displacement of the inner sliding extrusion cylinder 16; in order to ensure the smooth displacement of the inner sliding extrusion cylinder 16, a wear-resistant lubricating coating can be provided on the outer wall of the inner sliding extrusion cylinder 16; and the provided threaded hole 17 cooperates with the limit groove 19 and the limit screw 18 to limit the maximum upward position of the inner sliding extrusion cylinder 16, thereby preventing the inner sliding extrusion cylinder 16 from excessive displacement.

[0106] Embodiment 6:

[0107] This embodiment provides a piston hole processing machine, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0108] The inner support cylinder further includes a hydraulic passage 20, which includes a main passage penetrating from the outer flange 13 inwardly into the first stepped portion 14a and a plurality of side passages extending from the inner end surface of the first stepped portion 14a and connected to the main passage in a circumferential manner. A hydraulic cavity is formed between the lower end of the inner floating ring and the first hole portion 16a and the first stepped portion 14a, and the side passages are connected to the hydraulic cavity.

[0109] The inner floating ring includes:

[0110] The middle support ring 21 is rectangular, and the upper outer edge and the lower inner edge of the middle support ring 21 are respectively provided with matching grooves 21a;

[0111] The end support ring 22 is provided with an end support ring 22 floatingly connected to the middle support ring 21 on both sides of the middle support ring 21, and a lower pressure rib 22a extending into the matching groove 21a is formed on the end support ring 22; and a connecting through hole is provided on the end support ring 22, and a floating connecting hole is provided on the middle support ring 21, and the end support ring 22 is connected to the middle support ring 21 through a floating connecting bolt, wherein the floating connecting bolt is slidably matched with the connecting through hole and is threadedly connected with the floating connecting hole;

[0112] A floating seal assembly is provided in each matching groove 21a, the floating seal at the upper end of the intermediate support ring 21 is sealed with the first hole portion 16a, and the floating seal at the lower end of the intermediate support ring 21 is sealed with the second step portion 14b;

[0113] A sunken groove is formed on one side edge of the end support ring 22 with the downward pressing rib 22a.

[0114] In the present embodiment, the hydraulic channel 20 is provided therein to squeeze the inner floating ring by conveying hydraulic oil into the hydraulic channel 20. When the oil pressure is large enough, the inner floating ring will be squeezed to move in the direction away from the first step 14a, thereby prompting the inner sliding extrusion cylinder 16 to move upward, until the inner sliding extrusion cylinder 16 moves up to the upper limit position, while compressing the upper limit buffer rod, and then the hydraulic oil is continuously conveyed to the hydraulic channel 20 to prevent the inner sliding extrusion cylinder 16 from moving downward, so as to prevent the supporting piece from loosening; when the hydraulic oil is no longer conveyed to the hydraulic channel 20 and the hydraulic channel 20 is connected to the outside world, under the action of the reset and extension of the upper limit buffer rod, the inner sliding extrusion cylinder 16 drives the inner floating ring to move downward, prompting the hydraulic oil in the hydraulic cavity to be discharged, thereby ensuring that the inner sliding extrusion cylinder 16 is reset in time; in order to provide In order to increase the resetting speed of the inner sliding extrusion cylinder 16, an inner return cavity 39 can be provided on the bottom of the first hole portion 16a and the side wall of the second hole portion 16b, and an auxiliary channel 37 connected to the inner return cavity 39 can be provided. The auxiliary channel 37 includes an auxiliary channel 37 extending from the outer flange 13 to the second step portion 14b and a plurality of auxiliary side flow holes evenly distributed on the circumference and connected to the auxiliary channel 37 and extending from the side wall of the second step portion 14b to communicate with the inner return cavity 39. By conveying hydraulic oil into the auxiliary channel 37, it is convenient to discharge the hydraulic oil in the hydraulic cavity, thereby facilitating the resetting of the inner sliding extrusion cylinder 16 under the action of the upper limit buffer rod; the intermediate support ring 21 and the end support ring 22 in the inner floating ring can be made of engineering plastics, and the floating seal assembly is made of wear-resistant rubber material.

[0115] Embodiment 7:

[0116] This embodiment provides a piston hole processing machine, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0117] The floating seal assembly includes:

[0118] The inner sealing ring 23 includes an outer sealing portion 23a that is slidably matched with the sinking groove portion, and an inner sealing portion 23b that is arranged on the inner side of the outer sealing portion 23a and is sealed with the side wall of the matching groove 21a. A side wall of the inner sealing portion 23b away from the side wall of the matching groove 21a is formed with a tapered inner inclined matching portion 23c with a decreasing diameter from the outer sealing portion 23a to a direction away from the outer sealing portion 23a;

[0119] The outer sealing ring 24 is arranged on the bottom end surface of the matching groove 21a and is located on the inner side of the outer sealing portion 23a close to the matching groove 21a, and the inner wall of the outer sealing ring 24 is formed with a conical outer inclined matching portion 24a which is pressed and matched with the inner inclined matching portion 23c;

[0120] A floating gap I is formed between the side of the outer sealing ring 24 away from the bottom of the matching groove 21a and the outer sealing part 23a, and the downward pressure rib 22a is arranged toward the outer end face of the inner sealing part 23b and forms a floating gap II with the end face of the inner sealing part 23b; the inner end face of the inner sealing part 23b is arranged toward the bottom end face of the matching groove 21a and forms a floating gap III with the bottom end face of the matching groove 21a; a floating gap IV is formed between the end face of the end support ring 22 and the end face of the middle support ring 21; and a number of equidistantly distributed inner sealing ribs 23d are formed on a side wall where the inner sealing part 23b matches the side wall of the matching groove 21a, and a number of equidistantly distributed outer sealing ribs 24b are arranged on a side wall of the outer sealing ring 24 away from the inner inclined matching part 23c.

[0121] In this embodiment, when the inner floating ring is subjected to force, the outer sealing ring 24 and the inner sealing ring 23 will be urged to move closer, so that the outer inclined fitting portion 24a and the inner inclined fitting portion 23c are squeezed, so that the inner sealing ring 23 and the outer sealing ring 24 are firmly attached to the contact surfaces on both sides, thereby packaging the sealing effect of the inner floating ring; at the same time, the floating gap I, floating gap II and floating gap III set can make the inner floating ring as a whole undergo a certain compression when the inner floating ring is subjected to force, so as to ensure that the outer sealing ring 24 and the inner sealing ring 23 can fit better; and the setting of the outer sealing rib 24b and the inner sealing rib 23d can further improve the sealing effect; and the floating sealing assembly located on the upper side is to ensure the sealing effect between the intermediate support ring 21 and the first hole portion 16a, and the floating sealing assembly located on the lower side is to ensure the sealing effect between the intermediate support ring 21 and the side wall of the second step portion 14b.

[0122] Embodiment 8:

[0123] This embodiment provides a piston hole processing machine, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0124] The upper limit buffer rod includes:

[0125] An upper support rod, the upper end of which abuts against the upper end cover 6 and is partially inserted into the upper end cover 6;

[0126] A lower support cylinder, the bottom of which abuts against the end surface of the inner sliding extrusion cylinder 16 and is partially inserted into the inner sliding extrusion cylinder 16;

[0127] The upper support rod includes:

[0128] A support rod portion 25, the upper end of which abuts against the upper end cover 6, and the lower end of which extends into the lower support tube, and a fixing section is formed on the side of the support rod away from the upper end cover 6, and a fixing groove is provided on the fixing section;

[0129] An inner sealing piston 26 is provided on the fixed section by bolts, and the inner sealing piston 26 is in sealing contact with the inner wall of the lower support cylinder;

[0130] The lower supporting cylinder is filled with a buffer solution.

[0131] The upper support rod of the upper limit buffer rod arranged in the support platform 2 is arranged toward the outer clamping tube and abuts against the outer clamping tube, and the lower support tube abuts against the positioning nut.

[0132] In this embodiment, a closed chamber is formed inside the inner sealing piston 26, which is filled with buffer solution. When the inner sliding extrusion cylinder 16 moves upward, the upper support rod is prompted to move into the lower support cylinder. Due to the setting of the inner sealing piston 26, the buffer solution can be squeezed, thereby playing a good buffering role.

[0133] Embodiment 9:

[0134] This embodiment provides a piston hole processing machine, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0135] The lower support tube includes:

[0136] An outer cylinder 27, one end of the outer cylinder 27 is open and the other end is closed, and the support rod 25 extends into the outer cylinder 27;

[0137] An end sealing plug 28 is provided at the opening of the outer cylinder 27, and a protruding rod insertion portion is formed in the middle of one side of the end sealing plug 28 facing the outside of the outer cylinder 27, and a rod insertion hole is provided on the rod insertion portion that penetrates the end sealing plug 28, and the rod insertion hole is slidably matched with the support rod portion 25;

[0138] An outer fixing cover 29 is provided on one side of the outer cylinder 27 with an opening to cover the end sealing plug 28, and an insertion hole is formed in the middle of the outer fixing cover 29, and the support rod 25 is gap-matched with the insertion hole;

[0139] The inner return spring 30 is disposed in the outer cylinder 27 , and one end of the inner return spring 30 abuts against the inner sealing piston 26 .

[0140] In this embodiment, the end sealing cover 38 can ensure a good sealing effect of the outer cylinder 27, and the outer fixed cover 29 provided can facilitate the fixation and limiting section sealing plug, and the internal return spring 30 provided can improve the return of the inner sealing piston 26, thereby improving the return effect of the upper support rod.

[0141] Embodiment 10:

[0142] This embodiment provides a piston hole processing machine, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0143] The lower support tube also includes:

[0144] The inner cylinder 31 is coaxially arranged in the outer cylinder 27, and an opening is formed on the side of the inner cylinder 31 facing the outer cylinder 27, and the end sealing plug 28 abuts against the end surface of the inner cylinder 31 with the opening, and the inner sealing piston 26 and the inner return spring 30 are located in the inner cylinder 31;

[0145] An inner support block 32 is provided at the bottom of the outer cylinder 27, and a groove is formed at one end of the inner support block 32 away from the bottom of the outer cylinder 27, and the inner cylinder 31 is inserted into the groove;

[0146] An outer floating cavity 33 is formed between the inner cylinder 31 and the outer cylinder 27, and both ends of the outer floating cavity 33 are closed by the inner support block 32 and the end sealing plug 28;

[0147] An inner floating plug 34 is provided on one side of the inner floating cavity close to the inner support block 32 and is slidably matched with the inner floating plug 34;

[0148] An external return spring 35 is disposed in the external floating cavity 33, one end of the external floating spring abuts against the end sealing plug 28, and the other end abuts against the internal floating plug 34;

[0149] External receiving holes 36: a plurality of external receiving holes 36 penetrating the inner cylinder 31 are provided at the bottom of the inner cylinder 31, and the external receiving holes 36 extend out of the end surface of the inner support block 32 on the side close to the inner floating plug 34;

[0150] The buffer solution is filled in the inner cylinder 31; an inner block extending into the inner cylinder 31 is provided on the side of the end sealing plug 28 facing the inner cylinder 31, a conical receiving hole coaxially matched with the rod insertion hole is formed in the middle of the inner block, a sealing cover 38 is provided at the port of the receiving hole, a sealing ring is provided in the sealing cover 38, and the support rod portion 25 passes through the middle of the sealing cover 38 and the sealing ring and is slidably connected thereto.

[0151] In this embodiment, when the upper support rod is pressed into the upper support rod, the inner sealing piston 26 moves toward the bottom of the inner cylinder 31, thereby squeezing the buffer solution in the inner cylinder 31, and the squeezed buffer solution enters the outer floating chamber 33 through the outer receiving hole 36. The hydraulic fluid entering the outer floating chamber 33 squeezes the inner sealing piston 26 to move toward the end sealing plug 28, thereby achieving a good telescopic effect. Since the inner sealing piston 26 is compressed, the outer reset spring 35 is squeezed, so that the inner sealing piston 26 is reset when no force is applied, prompting the buffer solution to be discharged from the outer floating chamber 33 into the inner cylinder 31; and the provided sealing ring and cover 38 can improve the sealing effect of the contact between the upper support rod and the end sealing plug 28.

[0152] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A piston hole processing machine, characterized in that: include: A support seat (1), wherein a support frame is provided at the bottom of the support seat (1); A support platform (2), wherein the support platform (2) is fixedly arranged in the middle of the upper end of the support seat (1); A feeding mechanism (3), wherein the feeding mechanism (3) is disposed at the upper end of the support seat (1) and on both sides of the support platform (2); A drilling mechanism (4), wherein each of the feeding mechanisms (3) is provided with a drilling mechanism (4) driven thereby; A clamping mechanism, wherein the support platform (2) is provided with a clamping mechanism; A placement hole (5) is provided in the middle of the support platform (2) and penetrates the support platform (2) and the support seat (1); The clamping mechanism comprises: An outer clamping tube, wherein the outer clamping tube passes through the placement hole (5) from the lower end of the support seat (1) and abuts against the support seat (1); An inner support cylinder is arranged inside the outer clamping cylinder; An upper end cover (6), the upper end cover (6) being arranged inward from the upper end of the outer clamping tube and fixedly connected to the inner support tube; An internal transmission assembly is provided between the outer clamping cylinder and the inner support cylinder; The inner transmission component can squeeze the outer clamping tube to expand the diameter of the upper end of the outer clamping tube; The outer clamping tube includes the following parts connected in sequence from bottom to top: An inner flange (7), wherein the inner flange (7) abuts against a bottom end surface of the support seat (1); A clamping cylinder (8), wherein a through clamping stepped hole (9) is formed in the middle of the clamping cylinder (8), a deformation gap (10) is formed between the clamping stepped hole (9) and the placement hole (5), a plurality of uniformly distributed deformation grooves (11) are extended downward from the upper end of the clamping cylinder (8), and a clamping groove (12) is formed on the outer wall of the upper end of the clamping cylinder (8); The clamping stepped hole (9) includes the following arranged in order from bottom to top: A lower sliding fitting hole (9a), wherein the lower sliding fitting hole (9a) is cylindrical and extends inwardly from the lower end of the clamping cylinder (8); An upper clamping fitting hole (9b), wherein the upper clamping fitting hole (9b) is formed into a conical surface with a decreasing diameter from the connection point with the lower sliding fitting hole (9a) inwards; An upper receiving matching hole (9c), wherein the upper receiving matching hole (9c) extends inward from the upper end of the clamping cylinder (8) and is connected to the upper clamping matching hole (9b); The internal transmission assembly comprises: An inner sliding extrusion cylinder (16), wherein the inner sliding extrusion cylinder (16) is located in the lower sliding matching hole (9a) and the upper clamping matching hole (9b), and is slidingly matched with the lower sliding matching hole (9a) and the upper clamping matching hole (9b); An inner floating ring is provided in the inner groove of the inner sliding extrusion cylinder (16), and the inner floating ring drives the inner sliding extrusion cylinder (16) to move; An upper limit buffer rod, wherein a plurality of the upper limit buffer rods are evenly distributed along the circumference and one end of the upper limit buffer rods abuts against the upper end cover (6) and the other end of the upper limit buffer rods abuts against the inner sliding extrusion cylinder (16).

2. A piston hole machining machine according to claim 1, characterized in that: The inner support tube includes the following parts connected in sequence from bottom to top: An outer flange (13), wherein the outer flange (13) and the inner flange (7) are coaxially arranged, and the end surfaces of the outer flange (13) and the inner flange (7) abut against each other and are fixedly connected; An inner step portion (14), wherein the inner step portion (14) extends into the clamping step hole (9) and cooperates with the clamping step hole (9).

3. A piston hole machining machine according to claim 2, characterized in that: The inner stepped portion (14) comprises, from bottom to top, the following portions which are arranged in sequence and have decreasing diameters: A first stepped portion (14a), wherein the first stepped portion (14a) is clearance-matched with the lower sliding fitting hole (9a); A second step portion (14b), wherein the second step portion (14b) is located at the connection between the lower sliding matching hole (9a) and the upper clamping matching hole (9b); A third step portion (14c), wherein the third step portion (14c) extends to a position close to the upper end of the upper clamping fitting hole (9b).

4. A piston hole machining machine according to claim 3, characterized in that: The inner support cylinder further comprises a hydraulic channel (20); The inner floating ring comprises: An intermediate support ring (21), wherein the intermediate support ring (21) is rectangular, and matching grooves (21a) are respectively provided on the upper outer edge and the lower inner edge of the intermediate support ring (21); End support rings (22), end support rings (22) floatingly connected to the middle support ring (21) are arranged on both sides of the middle support ring (21), and downward pressure ribs (22a) extending into the matching grooves (21a) are formed on the end support rings (22); A floating seal assembly is provided in each of the matching grooves (21a), wherein the floating seal located at the upper end of the intermediate support ring (21) is sealingly matched with the first hole portion (16a), and the floating seal located at the lower end of the intermediate support ring (21) is sealingly matched with the second step portion (14b).

5. A piston hole machining machine according to claim 4, characterized in that: The floating seal assembly comprises: An inner sealing ring (23), the inner sealing ring (23) comprising an outer sealing portion (23a) slidably matched with the sinking groove portion, and an inner sealing portion (23b) arranged on the inner side of the outer sealing portion (23a) and sealingly matched with the side wall of the matching groove (21a), wherein a side wall of the inner sealing portion (23b) away from the side wall of the matching groove (21a) is formed with a conical inner inclined matching portion (23c) with a diameter decreasing from the outer sealing portion (23a) toward a direction away from the outer sealing portion (23a); An outer sealing ring (24), wherein the outer sealing ring (24) is arranged on the bottom end surface of the matching groove (21a) and is located on the inner side of the outer sealing portion (23a), and the inner wall of the outer sealing ring (24) is formed with a conical outer inclined matching portion (24a) which is pressed and matched with the inner inclined matching portion (23c).

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