Shell self-centering hydraulic clamp

Abstract

The utility model discloses a shell self-centering hydraulic clamp which comprises a clamp body, and a hydraulic cylindrical pin assembly and a hydraulic rhombic pin assembly are arranged on the clamp body. Three main positioning sliding blocks are arranged between a main positioning pin cover sliding block contact section and a main positioning pin seat sliding block contact section of the hydraulic cylindrical pin assembly, and the three main positioning sliding blocks move in the radial direction to enable three main positioning supporting heads to abut against the inner wall of a blank hole. Two auxiliary positioning sliding blocks are arranged between an auxiliary positioning pin cover sliding block contact section and an auxiliary positioning pin seat sliding block contact section of the hydraulic rhombic pin assembly, and the two auxiliary positioning sliding blocks move in the radial direction to enable two auxiliary positioning supporting heads to abut against the inner wall of a blank hole. According to the shell self-centering hydraulic clamp, an operator only needs to roughly place a workpiece on the clamp, after a hydraulic element works, the workpiece moves to a proper position under the action of the two positioning pins, the two positioning pins automatically align to the center of a blank positioning hole, meanwhile, the workpiece is clamped, and the centering precision is higher.

Description

TECHNICAL FIELD

[0001] The utility model belongs to vehicle technical field relates to hydraulic fixture, concretely relates to a casing self-centering hydraulic fixture. BACKGROUND

[0002] In the processing of casing parts, the positioning mode of one side two pins is usually adopted, and the traditional fixture is positioned by the action of two taper pins and blank holes, which has the following shortcomings:

[0003] ①The fixture does not have self-centering effect, and the operator needs to manually shake the workpiece after the workpiece is placed on the fixture, so that the center of the workpiece coincides with the center of the positioning pin, which not only consumes time, but also easily produces a large centering error;

[0004] ②The blank hole orifice edge of the workpiece is positioned by sticking to the side wall of the positioning pin, and the blank quality of the blank positioning hole is difficult to control during casting, which adversely affects the positioning accuracy;

[0005] ③After the workpiece is installed, the compression screws on the side edges of the two taper pins are tightened to fix the taper pins, and the blank hole is usually in the central position of the workpiece, so the operator cannot easily adjust the compression screws. SUMMARY

[0006] In view of the deficiencies of the prior art, the utility model provides a casing self-centering hydraulic fixture to solve the technical problems that the fixture in the prior art cannot quickly and accurately center and has low positioning accuracy.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A casing self-centering hydraulic fixture, comprising a fixture body, a main positioning push cylinder installation groove and a vice positioning push cylinder installation groove are formed in the fixture body, characterized in that a hydraulic cylindrical pin assembly and a hydraulic diamond pin assembly are respectively arranged on the fixture body.

[0009] The hydraulic cylindrical pin assembly comprises a main positioning pin seat, and the main positioning pin seat comprises a main positioning pin seat body section and a main positioning pin seat slider contact section connected in sequence.

[0010] The hydraulic cylindrical pin assembly further comprises a main positioning pin cover, and the main positioning pin cover comprises a main positioning pin cover body section and a main positioning pin cover slider contact section coaxially connected in sequence.

[0011] Three main positioning sliders are arranged between the main positioning pin cover slider contact section and the main positioning pin seat slider contact section, the three main positioning sliders are uniformly arranged around the circumference, and the outer end faces of the three main positioning sliders are provided with main positioning branch heads, and the three main positioning branch heads are supported on the inner wall of the blank hole through the radial movement of the three main positioning sliders.

[0012] The hydraulic diamond pin assembly includes a secondary positioning pin seat, which comprises a secondary positioning pin seat body section and a secondary positioning pin seat slider contact section connected in sequence.

[0013] The hydraulic diamond pin assembly also includes a secondary positioning pin cover, which comprises a secondary positioning pin cover body section and a secondary positioning pin cover slider contact section connected coaxially in sequence.

[0014] Two secondary positioning sliders are provided between the contact section of the secondary positioning pin cover slider and the contact section of the secondary positioning pin seat slider. The two secondary positioning sliders are symmetrically arranged around the circumference. Each of the two secondary positioning sliders has a secondary positioning support on its outer end face. The radial movement of the two secondary positioning sliders causes the two secondary positioning supports to press against the inner wall of the blank hole.

[0015] This utility model also has the following technical features:

[0016] The outer diameter of the main positioning pin body section is larger than the outer diameter of the main positioning pin slider contact section. The lower end of the main positioning pin body section is fixedly connected to the fixture body. The main positioning pin body section and the main positioning pin slider contact section are vertically coaxially opened at the center position. The diameter of the main positioning pin body section mounting groove is larger than the diameter of the main positioning pin slider contact section mounting groove.

[0017] The hydraulic cylindrical pin assembly also includes a main positioning push cylinder, which moves axially within the main positioning push cylinder mounting groove and the main positioning pin seat body section mounting groove. The main positioning push cylinder is fixedly connected to the main positioning push rod, and the main positioning push rod is fixedly connected to the main positioning pin push column. The main positioning pin push column moves axially under the action of the main positioning push cylinder.

[0018] The main positioning pin push column includes a main positioning smooth inclined surface section and a main positioning push section connected in sequence. The main positioning push section is used to cooperate and be fixedly connected with the main positioning push rod. The main positioning push section is in clearance fit with the mounting groove of the main positioning pin seat slider contact section.

[0019] The top end of the main positioning smooth inclined section is fixedly connected to the main positioning top post, the main positioning top post is movably connected to the main positioning pin cover, the top of the main positioning top post is fixedly connected to one end of the main positioning compression spring, the top of the main positioning compression spring is provided with a main positioning screw plug, the main positioning screw plug is fixedly connected to the main positioning pin cover to position the main positioning compression spring.

[0020] The outer diameter of the main positioning pin cover slider contact section is equal to the outer diameter of the main positioning pin cover body section. The main positioning pin cover body section and the main positioning pin cover slider contact section are coaxially arranged with the main positioning pin seat slider contact section. The main positioning pin cover slider contact section does not contact the main positioning pin seat slider contact section. The outer diameter of the main positioning pin cover slider contact section is equal to the outer diameter of the main positioning pin seat slider contact section.

[0021] The main positioning pin cover body section and the main positioning pin cover slider contact section are sequentially and coaxially opened at their center positions, with the main positioning pin cover body section mounting groove and the main positioning pin cover slider contact section mounting groove being fixedly engaged in the main positioning pin cover body section mounting groove.

[0022] The diameter of the mounting groove of the main positioning pin cover body section is smaller than the diameter of the mounting groove of the main positioning pin cover slider contact section, and the height of the mounting groove of the main positioning pin cover body section is greater than the height of the mounting groove of the main positioning pin cover slider contact section. The main positioning pin push column moves axially within the mounting groove of the main positioning pin cover body section and the mounting groove of the main positioning pin cover slider contact section through the main positioning push cylinder.

[0023] The inner end faces of the three main positioning sliders are in contact with the smooth sidewall of the main positioning smooth inclined section. The three main positioning sliders move radially between the main positioning pin cover slider contact section and the main positioning pin seat slider contact section through the axial movement of the main positioning smooth inclined section.

[0024] The outer diameter of the secondary positioning pin body section is larger than the outer diameter of the secondary positioning pin slider contact section. The lower end of the secondary positioning pin body section is fixedly connected to the fixture body. The secondary positioning pin body section and the secondary positioning pin slider contact section are vertically coaxially opened at the center position. The diameter of the secondary positioning pin body section mounting groove is larger than the diameter of the secondary positioning pin slider contact section mounting groove.

[0025] The hydraulic diamond pin assembly also includes a secondary positioning push cylinder, which moves axially within the secondary positioning push cylinder mounting groove and the secondary positioning pin seat body section mounting groove. The secondary positioning push cylinder is fixedly connected to the secondary positioning push rod, and the secondary positioning push rod is fixedly connected to the secondary positioning pin push column. The secondary positioning pin push column moves axially under the action of the secondary positioning push cylinder.

[0026] The secondary positioning pin push column includes a secondary positioning smooth inclined surface section and a secondary positioning push section connected in sequence. The secondary positioning push section is used to cooperate and be fixedly connected with the secondary positioning push rod. The secondary positioning push section is in clearance fit with the mounting groove of the contact section of the secondary positioning pin seat slider.

[0027] The top end of the smooth inclined section of the secondary positioning is fixedly connected to the secondary positioning top post, the secondary positioning top post is movably connected to the secondary positioning pin cover, the top of the secondary positioning top post is fixedly connected to the end with the secondary positioning compression spring, the top of the secondary positioning compression spring is provided with a secondary positioning screw plug, the secondary positioning screw plug is fixedly connected to the secondary positioning pin cover to position the secondary positioning compression spring.

[0028] The outer diameter of the secondary positioning pin cover slider contact section is equal to the outer diameter of the secondary positioning pin cover body section. The secondary positioning pin cover body section and the secondary positioning pin cover slider contact section are coaxially arranged with the secondary positioning pin seat slider contact section. The secondary positioning pin cover slider contact section and the secondary positioning pin seat slider contact section do not contact each other. The outer diameter of the secondary positioning pin cover slider contact section is equal to the outer diameter of the secondary positioning pin seat slider contact section.

[0029] The center positions of the secondary positioning pin cover body section and the secondary positioning pin cover slider contact section are sequentially and coaxially opened with the secondary positioning pin cover body section mounting groove and the secondary positioning pin cover slider contact section mounting groove, and the secondary positioning screw plug is fixedly snapped into the secondary positioning pin cover body section mounting groove.

[0030] The diameter of the mounting groove of the secondary positioning pin cover body section is smaller than the diameter of the mounting groove of the secondary positioning pin cover slider contact section, and the height of the mounting groove of the secondary positioning pin cover body section is greater than the height of the mounting groove of the secondary positioning pin cover slider contact section. The secondary positioning pin push column moves axially within the mounting groove of the secondary positioning pin cover body section and the mounting groove of the secondary positioning pin cover slider contact section through the secondary positioning push cylinder.

[0031] The inner end faces of the two auxiliary positioning sliders are in contact with the smooth sidewall of the auxiliary positioning smooth inclined section. The two auxiliary positioning sliders are moved radially between the auxiliary positioning pin cover slider contact section and the auxiliary positioning pin seat slider contact section by the auxiliary positioning pin push column and the auxiliary positioning push cylinder, which in turn causes the auxiliary positioning top column to move axially through the auxiliary positioning compression spring in the auxiliary positioning smooth inclined section.

[0032] The fixture body is also provided with three fixed support columns and three clamping components, and the three fixed support columns are respectively connected to the three clamping components.

[0033] The fixture body is also equipped with two floating support hydraulic cylinders.

[0034] The main positioning push cylinder mounting groove, the main positioning pin seat body section mounting groove, the main positioning pin seat slider contact section mounting groove, the main positioning pin cover body section mounting groove, and the main positioning pin cover slider contact section mounting groove are arranged coaxially in sequence.

[0035] The auxiliary positioning push cylinder mounting groove, the auxiliary positioning pin seat body section mounting groove, the auxiliary positioning pin seat slider contact section mounting groove, the auxiliary positioning pin cover body section mounting groove, and the auxiliary positioning pin cover slider contact section mounting groove are arranged coaxially in sequence.

[0036] Compared with the prior art, the present invention has the following beneficial technical effects:

[0037] (I) The self-centering hydraulic clamp for the housing proposed in this utility model allows the operator to simply place the workpiece roughly on the clamp. After the hydraulic components work, the workpiece moves to a suitable position under the action of the two positioning pins. The two positioning pins automatically find the center of the blank positioning hole and clamp the workpiece at the same time, making the centering accuracy higher.

[0038] (II) The self-centering hydraulic clamp for the shell proposed in this utility model has two positioning pins that contact the inner wall of the blank hole for positioning. Compared with the edge of the blank hole, the casting quality is better and the positioning accuracy is higher.

[0039] (III) The self-centering hydraulic clamp of the housing proposed in this utility model has a hydraulic structure for positioning elements. The support head automatically pushes onto the workpiece for positioning, which is more suitable for the use of hydraulic clamps, does not require manual operation, and is more intelligent. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure assembly of a self-centering hydraulic clamp.

[0041] Figure 2 This is a cross-sectional structural diagram of a hydraulic cylindrical pin assembly and a hydraulic diamond pin assembly.

[0042] The meanings of the labels in the diagram are as follows: 1-Clamp body, 2-Hydraulic cylindrical pin assembly, 3-Hydraulic diamond pin assembly, 4-Fixed support column, 5-Clamping component, 6-Floating support hydraulic cylinder.

[0043] 101 - Main positioning push cylinder mounting slot, 102 - Auxiliary positioning push cylinder mounting slot.

[0044] 201-Main positioning pin seat, 202-Main positioning push cylinder, 203-Main positioning push rod, 204-Main positioning pin push column, 205-Main positioning top column, 206-Main positioning pin cover, 207-Main positioning compression spring, 208-Main positioning screw plug, 209-Main positioning slider, 210-Main positioning support head.

[0045] 301 - Secondary positioning pin seat, 302 - Secondary positioning push cylinder, 303 - Secondary positioning push rod, 304 - Secondary positioning pin push column, 305 - Secondary positioning top column, 306 - Secondary positioning pin cover, 307 - Secondary positioning compression spring, 308 - Secondary positioning screw plug, 309 - Secondary positioning slider, 310 - Secondary positioning support head.

[0046] 20101 - Main locating pin seat body section; 20102 - Main locating pin seat slider contact section; 20103 - Main locating pin seat body section mounting groove; 20104 - Main locating pin seat slider contact section mounting groove; 20401 - Main locating smooth inclined surface section; 20402 - Main locating push section; 20601 - Main locating pin cover body section; 20602 - Main locating pin cover slider contact section; 20603 - Main locating pin cover body section mounting groove; 20604 - Main locating pin cover slider contact section mounting groove.

[0047] 30101 - Secondary locating pin seat body section; 30102 - Secondary locating pin seat slider contact section; 30103 - Secondary locating pin seat body section mounting groove; 30104 - Secondary locating pin seat slider contact section mounting groove; 30401 - Secondary locating smooth inclined surface section; 30402 - Secondary locating push section; 30601 - Secondary locating pin cover body section; 30602 - Secondary locating pin cover slider contact section; 30603 - Secondary locating pin cover body section mounting groove; 30604 - Secondary locating pin cover slider contact section mounting groove.

[0048] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0049] It should be noted that, unless otherwise specified, all equipment and components in this utility model are based on equipment and components known in the prior art.

[0050] In this invention, the fixed support column is fixed to the fixture body by hexagonal head screws; the hydraulic cylindrical pin assembly is fixed to the fixture body by hexagonal head screws; the hydraulic diamond pin assembly is fixed to the fixture body by hexagonal head screws; and the floating support hydraulic cylinder is fixed to the fixture body by hexagonal head screws.

[0051] Following the above technical solution, the following are specific embodiments of this utility model. It should be noted that this utility model is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solution of this application fall within the protection scope of this utility model.

[0052] Example:

[0053] This embodiment provides a self-centering hydraulic clamp for a housing, including a clamp body, such as... Figure 2 As shown, the fixture body 1 has a main positioning push cylinder mounting groove 101 and a secondary positioning push cylinder mounting groove 102. The fixture body 1 is respectively provided with a hydraulic cylindrical pin assembly 2 and a hydraulic diamond pin assembly 3.

[0054] like Figure 2As shown, the hydraulic cylindrical pin assembly 2 includes a main positioning pin seat 201, which includes a main positioning pin seat body section 20101 and a main positioning pin seat slider contact section 20102 connected in sequence.

[0055] like Figure 2 As shown, the hydraulic cylindrical pin assembly 2 also includes a main locating pin cover 206, which includes a main locating pin cover body section 20601 and a main locating pin cover slider contact section 20602 connected coaxially in sequence.

[0056] like Figure 2 As shown, three main positioning sliders 209 are provided between the main positioning pin cover slider contact section 20602 and the main positioning pin seat slider contact section 20102. The three main positioning sliders 209 are evenly distributed around the circumference. Each of the three main positioning sliders 209 has a main positioning support head 210 on its outer end face. The radial movement of the three main positioning sliders 209 causes the three main positioning supports head 210 to press against the inner wall of the blank hole.

[0057] like Figure 2 As shown, the hydraulic diamond pin assembly 3 includes a secondary positioning pin seat 301, which includes a secondary positioning pin seat body section 30101 and a secondary positioning pin seat slider contact section 30102 connected in sequence.

[0058] like Figure 2 As shown, the hydraulic diamond pin assembly 3 also includes a secondary positioning pin cover 306, which includes a secondary positioning pin cover body section 30601 and a secondary positioning pin cover slider contact section 30602 that are coaxially connected in sequence.

[0059] like Figure 2 As shown, two secondary positioning sliders 309 are provided between the secondary positioning pin cover slider contact section 30602 and the secondary positioning pin seat slider contact section 30102. The two secondary positioning sliders 309 are symmetrically arranged around the circumference. Each of the two secondary positioning sliders 309 has a secondary positioning support head 310 on its outer end face. The radial movement of the two secondary positioning sliders 309 causes the two secondary positioning supports head 310 to press against the inner wall of the blank hole.

[0060] As a preferred embodiment of this invention, such as Figure 2 As shown, the outer diameter of the main positioning pin body section 20101 is larger than the outer diameter of the main positioning pin slide contact section 20102. The lower end of the main positioning pin body section 20101 is fixedly connected to the fixture body 1. The main positioning pin body section mounting groove 20103 and the main positioning pin slide contact section mounting groove 20104 are vertically coaxially formed at the center positions of the main positioning pin body section 20101 and the main positioning pin slide contact section mounting groove 20104. The diameter of the main positioning pin body section mounting groove 20103 is larger than the diameter of the main positioning pin slide contact section mounting groove 20104.

[0061] As a preferred embodiment of this invention, such as Figure 2 As shown, the hydraulic cylindrical pin assembly 2 also includes a main positioning push cylinder 202. The main positioning push cylinder 202 moves axially within the main positioning push cylinder mounting groove 101 and the main positioning pin seat body section mounting groove 20103. The main positioning push cylinder 202 is fixedly connected to the main positioning push rod 203. The main positioning push rod 203 is fixedly connected to the main positioning pin push column 204. The main positioning pin push column 204 moves axially under the action of the main positioning push cylinder 202.

[0062] As a preferred embodiment of this invention, such as Figure 2 As shown, the main positioning pin push column 204 includes a main positioning smooth inclined surface section 20401 and a main positioning push section 20402 connected in sequence. The main positioning push section 20402 is used to cooperate and be fixedly connected with the main positioning push rod 203. The main positioning push section 20402 is clearance-fitted with the main positioning pin seat slider contact section mounting groove 20104.

[0063] As a preferred embodiment of this invention, such as Figure 2 As shown, the top end of the main positioning smooth inclined section 20401 is fixedly connected to the main positioning top post 205. The main positioning top post 205 is movably connected to the main positioning pin cover 206. The top of the main positioning top post 205 is fixedly connected to one end of the main positioning compression spring 207. The top of the main positioning compression spring 207 is provided with a main positioning screw plug 208. The main positioning screw plug 208 is fixedly connected to the main positioning pin cover 206 to position the main positioning compression spring 207.

[0064] As a preferred embodiment of this invention, such as Figure 2 As shown, the outer diameter of the main locating pin cover slider contact section 20602 is equal to the outer diameter of the main locating pin cover body section 20601. The main locating pin cover body section 20601 and the main locating pin cover slider contact section 20602 are coaxially arranged with the main locating pin seat slider contact section 20102. The main locating pin cover slider contact section 20602 does not contact the main locating pin seat slider contact section 20102. The outer diameter of the main locating pin cover slider contact section 20602 is equal to the outer diameter of the main locating pin seat slider contact section 20102.

[0065] As a preferred embodiment of this invention, such as Figure 2 As shown, the main positioning pin cover body section 20601 and the main positioning pin cover slider contact section 20602 are sequentially and coaxially opened with the main positioning pin cover body section mounting groove 20603 and the main positioning pin cover slider contact section mounting groove 20604, and the main positioning screw plug 208 is fixedly engaged in the main positioning pin cover body section mounting groove 20603.

[0066] As a preferred embodiment of this invention, such as Figure 2As shown, the diameter of the main positioning pin cover body section mounting groove 20603 is smaller than the diameter of the main positioning pin cover slider contact section mounting groove 20604, and the height of the main positioning pin cover body section mounting groove 20603 is greater than the height of the main positioning pin cover slider contact section mounting groove 20604. The main positioning pin push post 204 causes the main positioning top post 205 to move axially within the main positioning pin cover body section mounting groove 20603 and the main positioning pin cover slider contact section mounting groove 20604 via the main positioning push cylinder 202.

[0067] As a preferred embodiment of this invention, such as Figure 2 As shown, the inner end faces of the three main positioning sliders 209 are in contact with the smooth sidewall of the main positioning smooth inclined section 20401. The three main positioning sliders 209 move radially between the main positioning pin cover slider contact section 20602 and the main positioning pin seat slider contact section 20102 through the axial movement of the main positioning smooth inclined section 20401.

[0068] As a preferred embodiment of this invention, such as Figure 2 As shown, the outer diameter of the secondary positioning pin body section 30101 is larger than the outer diameter of the secondary positioning pin slider contact section 30102. The lower end of the secondary positioning pin body section 30101 is fixedly connected to the fixture body 1. The secondary positioning pin body section 30101 and the secondary positioning pin slider contact section 30102 are vertically coaxially opened at the center positions of the secondary positioning pin body section 30101 and the secondary positioning pin slider contact section 30104. The diameter of the secondary positioning pin body section 30103 is larger than the diameter of the secondary positioning pin slider contact section 30104.

[0069] As a preferred embodiment of this invention, such as Figure 2 As shown, the hydraulic diamond pin assembly 3 also includes a secondary positioning push cylinder 302. The secondary positioning push cylinder 302 moves axially within the secondary positioning push cylinder mounting groove 102 and the secondary positioning pin seat body section mounting groove 30103. The secondary positioning push cylinder 302 is fixedly connected to the secondary positioning push rod 303. The secondary positioning push rod 303 is fixedly connected to the secondary positioning pin push column 304. The secondary positioning pin push column 304 moves axially under the action of the secondary positioning push cylinder 302.

[0070] As a preferred embodiment of this invention, such as Figure 2 As shown, the secondary positioning pin push column 304 includes a secondary positioning smooth inclined surface section 30401 and a secondary positioning push section 30402 connected in sequence. The secondary positioning push section 30402 is used to cooperate and be fixedly connected with the secondary positioning push rod 303. The secondary positioning push section 30402 is clearance-fitted with the secondary positioning pin seat slider contact section mounting groove 30104.

[0071] As a preferred embodiment of this invention, such as Figure 2As shown, the top end of the secondary positioning smooth inclined section 30401 is fixedly connected to the secondary positioning top post 305. The secondary positioning top post 305 is movably connected to the secondary positioning pin cover 306. The top of the secondary positioning top post 305 is fixedly connected to one end with a secondary positioning compression spring 307. The top of the secondary positioning compression spring 307 is provided with a secondary positioning screw plug 308. The secondary positioning screw plug 308 is fixedly connected to the secondary positioning pin cover 306 to position the secondary positioning compression spring 307.

[0072] As a preferred embodiment of this invention, such as Figure 2 As shown, the outer diameter of the secondary locating pin cover slider contact section 30602 is equal to the outer diameter of the secondary locating pin cover body section 30601. The secondary locating pin cover body section 30601 and the secondary locating pin cover slider contact section 30602 are coaxially arranged with the secondary locating pin seat slider contact section 30102. The secondary locating pin cover slider contact section 30602 does not contact the secondary locating pin seat slider contact section 30102. The outer diameter of the secondary locating pin cover slider contact section 30602 is equal to the outer diameter of the secondary locating pin seat slider contact section 30102.

[0073] As a preferred embodiment of this invention, such as Figure 2 As shown, the secondary positioning pin cover body section 30601 and the secondary positioning pin cover slider contact section 30602 are sequentially and coaxially opened with the secondary positioning pin cover body section mounting groove 30603 and the secondary positioning pin cover slider contact section mounting groove 30604, and the secondary positioning screw plug 308 is fixedly engaged in the secondary positioning pin cover body section mounting groove 30603.

[0074] As a preferred embodiment of this invention, such as Figure 2 As shown, the diameter of the mounting groove 30603 of the secondary positioning pin cover body section is smaller than the diameter of the mounting groove 30604 of the secondary positioning pin cover slider contact section, and the height of the mounting groove 30603 of the secondary positioning pin cover body section is greater than the height of the mounting groove 30604 of the secondary positioning pin cover slider contact section. The secondary positioning pin push post 304 causes the secondary positioning top post 305 to move axially within the mounting groove 30603 of the secondary positioning pin cover body section and the mounting groove 30604 of the secondary positioning pin cover slider contact section through the secondary positioning push cylinder 302.

[0075] As a preferred embodiment of this invention, such as Figure 2 As shown, the inner end faces of the two secondary positioning sliders 309 are in contact with the smooth sidewall of the secondary positioning smooth inclined section 30401. The two secondary positioning sliders 309 are driven by the secondary positioning pin push column 304 and the secondary positioning push cylinder 302, which causes the secondary positioning top column 305 to move axially in the secondary positioning smooth inclined section 30401 via the secondary positioning compression spring 306. This causes the two secondary positioning sliders 309 to move radially between the secondary positioning pin cover slider contact section 30602 and the secondary positioning pin seat slider contact section 30102.

[0076] As a preferred embodiment of this invention, such as Figure 1 As shown, the fixture body 1 is also provided with three fixed support columns 4 and three clamping parts 5, and the three fixed support columns 4 are connected to the three clamping parts 5 respectively.

[0077] As a preferred embodiment of this invention, such as Figure 1 As shown, two floating support hydraulic cylinders 6 are also respectively installed on the fixture body 1.

[0078] As a preferred embodiment of this invention, such as Figure 2 As shown, the main positioning push cylinder mounting groove 101, the main positioning pin seat body section mounting groove 20103, the main positioning pin seat slider contact section mounting groove 20104, the main positioning pin cover body section mounting groove 20603, and the main positioning pin cover slider contact section mounting groove 20604 are arranged coaxially in sequence.

[0079] As a preferred embodiment of this invention, such as Figure 2 As shown, the auxiliary positioning push cylinder mounting groove 102, the auxiliary positioning pin seat body section mounting groove 30103, the auxiliary positioning pin seat slider contact section mounting groove 30104, the auxiliary positioning pin cover body section mounting groove 30603, and the auxiliary positioning pin cover slider contact section mounting groove 30604 are arranged coaxially in sequence.

[0080] In this embodiment, the clamping member 5 is preferably used to clamp the workpiece.

[0081] In this embodiment, the floating support hydraulic cylinder 6 is preferably used to compensate for the irregularity of the workpiece surface and the positional offset and vibration caused by the mechanical cutting load.

[0082] The working process of the self-centering hydraulic clamp for the housing in this embodiment is as follows:

[0083] The workpiece is roughly placed on the self-centering hydraulic fixture. The hydraulic cylindrical pin assembly 2 and the hydraulic diamond pin assembly 3 are activated. The main positioning push cylinder 202 moves axially under hydraulic pressure. The main positioning push cylinder 202 drives the main positioning push rod 203 to move axially. The main positioning push rod 203 drives the main positioning pin push column 204 to move axially. The axial movement of the main positioning pin push column 204 causes the three main positioning sliders 209 to move radially. The radial movement of the three main positioning sliders 209 causes the three main positioning supports 210 to press against the inner wall of the blank hole. At the same time, the auxiliary positioning push cylinder 302 moves axially under hydraulic pressure. The auxiliary positioning push cylinder 302 drives the auxiliary positioning push rod 303 to move axially. The auxiliary positioning push rod 303 drives the auxiliary positioning pin push column 304 to move axially. The axial movement of the auxiliary positioning pin push column 304 causes the two auxiliary positioning sliders 309 to move radially. The radial movement of the two auxiliary positioning sliders 309 causes the auxiliary positioning supports 310 to press against the inner wall of the blank hole. Clamping component 5 clamps the workpiece, and floating support hydraulic cylinder 6 compensates for the irregularity of the workpiece surface and the positional offset and vibration caused by mechanical cutting load.

Claims

1. A self-centering hydraulic clamp for a housing, comprising a clamp body (1), wherein the clamp body (1) has a main positioning push cylinder mounting groove (101) and a secondary positioning push cylinder mounting groove (102), characterized in that, The clamp body (1) is provided with a hydraulic cylindrical pin assembly (2) and a hydraulic diamond pin assembly (3). The hydraulic cylindrical pin assembly (2) includes a main positioning pin seat (201), which includes a main positioning pin seat body section (20101) and a main positioning pin seat slider contact section (20102) connected in sequence. The hydraulic cylindrical pin assembly (2) further includes a main locating pin cover (206), which includes a main locating pin cover body section (20601) and a main locating pin cover slider contact section (20602) connected coaxially in sequence. Three main positioning sliders (209) are provided between the main positioning pin cover slider contact section (20602) and the main positioning pin seat slider contact section (20102). The three main positioning sliders (209) are evenly distributed around the circumference. The outer end face of each of the three main positioning sliders (209) is provided with a main positioning support (210). The radial movement of the three main positioning sliders (209) causes the three main positioning supports (210) to press against the inner wall of the blank hole. The hydraulic diamond pin assembly (3) includes a secondary positioning pin seat (301), which includes a secondary positioning pin seat body section (30101) and a secondary positioning pin seat slider contact section (30102) connected in sequence. The hydraulic diamond pin assembly (3) further includes a secondary positioning pin cover (306), which includes a secondary positioning pin cover body section (30601) and a secondary positioning pin cover slider contact section (30602) connected coaxially in sequence. Two secondary positioning sliders (309) are provided between the secondary positioning pin cover slider contact section (30602) and the secondary positioning pin seat slider contact section (30102). The two secondary positioning sliders (309) are symmetrically arranged around the circumference. The outer end face of each of the two secondary positioning sliders (309) is provided with a secondary positioning support (310). The radial movement of the two secondary positioning sliders (309) causes the two secondary positioning supports (310) to press against the inner wall of the blank hole.

2. The self-centering hydraulic clamp for housing as described in claim 1, characterized in that, The outer diameter of the main positioning pin body section (20101) is larger than the outer diameter of the main positioning pin slider contact section (20102). The lower end of the main positioning pin body section (20101) is fixedly connected to the fixture body (1). The main positioning pin body section (20101) and the main positioning pin slider contact section (20102) are vertically coaxially opened at the center positions of the main positioning pin body section (20103) and the main positioning pin slider contact section (20104). The diameter of the main positioning pin body section (20103) is larger than the diameter of the main positioning pin slider contact section (20104). The hydraulic cylindrical pin assembly (2) further includes a main positioning push cylinder (202), which moves axially in the main positioning push cylinder mounting groove (101) and the main positioning pin seat body section mounting groove (20103). The main positioning push cylinder (202) is fixedly connected to the main positioning push rod (203), and the main positioning push rod (203) is fixedly connected to the main positioning pin push column (204). The main positioning pin push column (204) moves axially under the action of the main positioning push cylinder (202). The main positioning pin push column (204) includes a main positioning smooth inclined surface section (20401) and a main positioning push section (20402) connected in sequence. The main positioning push section (20402) is used to cooperate with the main positioning push rod (203) for fixed connection. The main positioning push section (20402) is clearance-fitted with the main positioning pin seat slider contact section mounting groove (20104). The top end of the main positioning smooth inclined section (20401) is fixedly connected to the main positioning top post (205), the main positioning top post (205) is movably connected to the main positioning pin cover (206), the top of the main positioning top post (205) is fixedly connected to one end of the main positioning compression spring (207), the top of the main positioning compression spring (207) is provided with a main positioning screw plug (208), the main positioning screw plug (208) is fixedly connected to the main positioning pin cover (206) to position the main positioning compression spring (207); The outer diameter of the main locating pin cover slider contact section (20602) is equal to the outer diameter of the main locating pin cover body section (20601). The main locating pin cover body section (20601) and the main locating pin cover slider contact section (20602) are coaxially arranged with the main locating pin seat slider contact section (20102). The main locating pin cover slider contact section (20602) does not contact the main locating pin seat slider contact section (20102). The outer diameter of the main locating pin cover slider contact section (20602) is equal to the outer diameter of the main locating pin seat slider contact section (20102). The main positioning pin cover body section (20601) and the main positioning pin cover slider contact section (20602) are sequentially and coaxially opened with the main positioning pin cover body section mounting groove (20603) and the main positioning pin cover slider contact section mounting groove (20604), and the main positioning screw plug (208) is fixedly snapped into the main positioning pin cover body section mounting groove (20603); The diameter of the main positioning pin cover body section mounting groove (20603) is smaller than the diameter of the main positioning pin cover slider contact section mounting groove (20604), and the height of the main positioning pin cover body section mounting groove (20603) is greater than the height of the main positioning pin cover slider contact section mounting groove (20604). The main positioning pin push column (204) causes the main positioning top column (205) to move axially within the main positioning pin cover body section mounting groove (20603) and the main positioning pin cover slider contact section mounting groove (20604) through the main positioning push cylinder (202). The inner end faces of the three main positioning sliders (209) are in contact with the smooth sidewall of the main positioning smooth inclined section (20401). The three main positioning sliders (209) move radially between the main positioning pin cover slider contact section (20602) and the main positioning pin seat slider contact section (20102) through the axial movement of the main positioning smooth inclined section (20401).

3. The self-centering hydraulic clamp for housing as described in claim 1, characterized in that, The outer diameter of the secondary positioning pin body section (30101) is larger than the outer diameter of the secondary positioning pin slider contact section (30102). The lower end of the secondary positioning pin body section (30101) is fixedly connected to the fixture body (1). The secondary positioning pin body section (30101) and the secondary positioning pin slider contact section (30102) are vertically coaxially opened at the center positions of the secondary positioning pin body section (30101) and the secondary positioning pin slider contact section (30104). The diameter of the secondary positioning pin body section installation groove (30103) is larger than the diameter of the secondary positioning pin slider contact section installation groove (30104). The hydraulic diamond pin assembly (3) further includes a secondary positioning push cylinder (302), which moves axially within the secondary positioning push cylinder mounting groove (102) and the secondary positioning pin seat body section mounting groove (30103). The secondary positioning push cylinder (302) is fixedly connected to the secondary positioning push rod (303), and the secondary positioning push rod (303) is fixedly connected to the secondary positioning pin push column (304). The secondary positioning pin push column (304) moves axially under the action of the secondary positioning push cylinder (302). The secondary positioning pin push column (304) includes a secondary positioning smooth inclined surface section (30401) and a secondary positioning push section (30402) connected in sequence. The secondary positioning push section (30402) is used to cooperate with the secondary positioning push rod (303) for fixed connection. The secondary positioning push section (30402) is clearance-fitted with the secondary positioning pin seat slider contact section mounting groove (30104). The top end of the secondary positioning smooth inclined section (30401) is fixedly connected to the secondary positioning top post (305), the secondary positioning top post (305) is movably connected to the secondary positioning pin cover (306), the top of the secondary positioning top post (305) is fixedly connected to one end with a secondary positioning compression spring (307), the top of the secondary positioning compression spring (307) is provided with a secondary positioning screw plug (308), the secondary positioning screw plug (308) is fixedly connected to the secondary positioning pin cover (306) to position the secondary positioning compression spring (307); The outer diameter of the secondary positioning pin cover slider contact section (30602) is equal to the outer diameter of the secondary positioning pin cover body section (30601). The secondary positioning pin cover body section (30601) and the secondary positioning pin cover slider contact section (30602) are coaxially arranged with the secondary positioning pin seat slider contact section (30102). The secondary positioning pin cover slider contact section (30602) and the secondary positioning pin seat slider contact section (30102) do not contact each other. The outer diameter of the secondary positioning pin cover slider contact section (30602) is equal to the outer diameter of the secondary positioning pin seat slider contact section (30102). The secondary positioning pin cover body section (30601) and the secondary positioning pin cover slider contact section (30602) are respectively coaxially opened at their center positions, with the secondary positioning pin cover body section mounting groove (30603) and the secondary positioning pin cover slider contact section mounting groove (30604) being opened in sequence. The secondary positioning screw plug (308) is fixedly snapped into the secondary positioning pin cover body section mounting groove (30603). The diameter of the mounting groove (30603) of the secondary positioning pin cover body section is smaller than the diameter of the mounting groove (30604) of the secondary positioning pin cover slider contact section. The height of the mounting groove (30603) of the secondary positioning pin cover body section is greater than the height of the mounting groove (30604) of the secondary positioning pin cover slider contact section. The secondary positioning pin push column (304) causes the secondary positioning top column (305) to move axially within the mounting groove (30603) of the secondary positioning pin cover body section and the mounting groove (30604) of the secondary positioning pin cover slider contact section through the secondary positioning push cylinder (302). The inner end faces of the two auxiliary positioning sliders (309) are in contact with the smooth sidewall of the auxiliary positioning smooth inclined section (30401). The two auxiliary positioning sliders (309) are connected by the auxiliary positioning pin push column (304) and the auxiliary positioning push cylinder (302) to make the auxiliary positioning top column (305) move axially in the auxiliary positioning smooth inclined section (30401) through the auxiliary positioning compression spring (307), so that the two auxiliary positioning sliders (309) move radially between the auxiliary positioning pin cover slider contact section (30602) and the auxiliary positioning pin seat slider contact section (30102).

4. The self-centering hydraulic clamp for housing as described in claim 1, characterized in that, The fixture body (1) is also provided with three fixed support columns (4) and three clamping parts (5), and the three fixed support columns (4) are connected to the three clamping parts (5) respectively.

5. The self-centering hydraulic clamp for housing as described in claim 1, characterized in that, The fixture body (1) is also provided with two floating support hydraulic cylinders (6).

6. The self-centering hydraulic clamp for housing as described in claim 1 or 2, characterized in that, The main positioning push cylinder mounting groove (101), the main positioning pin seat body section mounting groove (20103), the main positioning pin seat slider contact section mounting groove (20104), the main positioning pin cover body section mounting groove (20603), and the main positioning pin cover slider contact section mounting groove (20604) are arranged coaxially in sequence.

7. The self-centering hydraulic clamp for housing as described in claim 1 or 3, characterized in that, The auxiliary positioning push cylinder mounting groove (102), the auxiliary positioning pin seat body section mounting groove (30103), the auxiliary positioning pin seat slider contact section mounting groove (30104), the auxiliary positioning pin cover body section mounting groove (30603), and the auxiliary positioning pin cover slider contact section mounting groove (30604) are arranged coaxially in sequence.

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