Dismounting clamp for sleeve and bushing parts

Abstract

The utility model belongs to the technical field of tool parts, and particularly discloses a sleeve and lining part dismounting clamp which comprises a split expansion clamping jaw, a hinge connector, an outer sleeve, an outer sleeve handle, a mandrel and a handle. The mandrel is of a slender shaft structure, the bottom end of the mandrel is a mandrel conical surface, the top end of the mandrel is provided with an unthreaded hole, and a handle is inserted into the unthreaded hole; the inner wall of the outer sleeve is provided with threads, and the mandrel is connected with the outer sleeve through the threads. The split expansion head expansion clamping jaw is connected with the hinge joint through a pin; the hinge joint is in threaded connection with the outer sleeve; and an outer sleeve handle is mounted at the upper end of the outer sleeve. By rotating the mandrel, the split expansion clamping jaws are expanded in the radial direction, and bosses at the heads of the clamping jaws tightly grasp the end face of an inner hole of a part so that the sleeve and the lining part can be disassembled in the axial direction. According to the clamp, the problem that in the using process of an original expansion head, clamping jaws deform, root stress is concentrated, and breakage is prone to occurring is solved, the service life of a tool is prolonged, and meanwhile the expansion clamping jaws of the expansion head are convenient to install and replace.

Description

Technical Field

[0001] This utility model belongs to the field of tooling components technology, specifically relating to a disassembly fixture for sleeve and bushing type parts. Background Technology

[0002] When disassembling sleeves and bushings with a large length-to-diameter ratio in aviation hydraulic servo gears, an expansion mandrel disassembly fixture is often used. This type of disassembly fixture includes a mandrel, an elastic expansion head, a pin, and an outer sleeve. The elastic expansion head is a cylindrical structure with one end being a cylindrical tube and the other end being divided into long strip-shaped claws. When this structure is squeezed by the conical surface of the mandrel, the root of the claws deforms significantly, causing stress concentration and making it prone to damage and breakage. This affects normal assembly and use, and damaged or broken expansion head parts are prone to falling into the narrow oil passages of aviation hydraulic servo gears, posing a risk of foreign objects. In addition, the opening range of the expansion head claws is relatively small, making it unsuitable for disassembling parts of various specifications.

[0003] To address the issue of stress concentration and easy damage to the jaws on the expansion head of the clamp during use, extend the service life of the expansion head, and make it suitable for the assembly and disassembly of various specifications of sleeves and bushings, a clamp for disassembling sleeves and bushings needs to be designed. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a disassembly fixture for sleeve and bushing parts, used for disassembling sleeve and bushing parts with a large length-to-diameter ratio in aviation hydraulic servo gears.

[0005] This utility model fixture modifies the expansion head structure and connection method, solving the problems of expansion deformation during mandrel compression and stress concentration at the root of the expansion head and claws, which easily leads to breakage, thus extending the tool's service life. When disassembling parts, the protrusion of the split expansion claw head clamps tightly against the bottom surface of the part, preventing contact with the inner wall of the part's hole. This avoids damage to the inner wall of sleeves and bushings caused by excessive force during tool use and reduces stress concentration points. Simultaneously, the split expansion claw is connected to the hinge joint via a pin, increasing the radial expansion range of the claw and making it suitable for axial disassembly of sleeves and bushings with various hole diameters, improving disassembly efficiency and expanding the tool's applicability.

[0006] This utility model provides a disassembly fixture for sleeves and bushings, comprising a split-type expansion head claw, a hinge joint, a pin, an outer sleeve, an outer sleeve handle, a mandrel, and a handle. The mandrel is a long, thin shaft with a conical bottom and a clear hole at the top, into which the handle is inserted. The outer sleeve is a cylindrical structure with threads on the inner walls at both ends, and the mandrel is threaded to the outer sleeve. The hinge joint is threaded to the outer sleeve. The split-type expansion head claw is conical and consists of three expansion plates arranged in a 120° ring. One end of each expansion plate has a lug with a clear hole, and the other end has a boss. The split-type expansion head claw is connected to the hinge joint by a pin, and the three expansion plates can rotate around the pin and open in a trumpet shape.

[0007] Furthermore, the hinge joint has a ring-shaped structure with three slots evenly distributed at one end and an external thread on the outer surface of the other end, which connects to the internal thread of the outer sleeve. Attached Figure Description

[0008] Figure 1 This is a structural schematic diagram of the sleeve and bushing disassembly fixture of this utility model;

[0009] Figure 2 This is a structural diagram of the expansion plate in the split expansion jaw of the sleeve and bushing disassembly fixture of this utility model;

[0010] Figure 3 This is a structural diagram of the split expansion claw in the sleeve and bushing disassembly fixture of this utility model;

[0011] Figure 4 This is a structural diagram of the hinge joint in the sleeve and bushing disassembly fixture of this utility model;

[0012] Figure 5 This is a structural diagram of the outer sleeve in the sleeve and bushing disassembly fixture of this utility model;

[0013] Figure 6 This is a structural diagram of the mandrel of the sleeve and bushing disassembly fixture of this utility model;

[0014] Figure 7 This is a schematic diagram illustrating the application of the sleeve and bushing disassembly fixture of this utility model.

[0015] The labels in the attached diagram are as follows: 1-Split expansion claw, 2-Hinge connector, 3-Pin, 4-Outer sleeve, 5-Outer sleeve handle, 6-Mandrel, 7-Handle, 8-Expansion plate, 9-Conical surface, 10-Ear with smooth hole, 11-Boss, 12-Slot, 13-Pin hole, 14-External thread, 15-Internal thread, 17-Mandrel conical surface, 18-Smooth hole. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Example

[0017] like Figure 1 As shown, this utility model discloses a disassembly fixture for sleeves and bushings, comprising a split expansion head claw 1, a hinge joint 2, a pin 3, an outer sleeve 4, an outer sleeve handle 5, a mandrel 6, and a handle 7; the mandrel 6 is a long slender shaft structure with a conical surface 17 at the bottom and a clear hole 18 at the top, into which the handle 7 is inserted; the outer sleeve 4 is a cylindrical structure with threads on the inner walls at both ends, and the mandrel and the outer sleeve are connected by threads; the outer sleeve 4 is connected to the hinge joint 2 by threads; the split expansion head claw 1 is connected to the hinge joint 2 by a pin 3; and the outer sleeve handle 5 is installed at the upper end of the outer sleeve.

[0018] like Figure 2-3 As shown, the split expansion head expansion claw 1 is composed of three expansion plates 8 arranged in a 120° ring. One end of each expansion plate is a light-perforated ear plate 10, and the other end is provided with a boss 11.

[0019] like Figure 4 As shown, the hinge head 2 has a ring-shaped structure with three slots evenly distributed at one end, and a pin hole 13 is provided on it. The outer surface of the other end is provided with an external thread 14.

[0020] like Figure 6 As shown, the mandrel 6 is a long thin shaft structure, with a conical surface 17 at the bottom for opening the split expansion head expansion claw 1, and a light hole 18 at the top for inserting a handle 7 for rotation; the middle section of the mandrel is a two-section structure, with an external thread on the upper section and a light shaft on the lower section.

[0021] like Figure 7 As shown, when disassembling sleeves and bushings, first rotate the mandrel 6 with handle of this utility model counterclockwise. The mandrel 6 is lifted axially, and the split expansion head expansion claw 1 retracts and is inserted into the inner hole of the sleeve or bushing to be disassembled. Manually rotate the mandrel 6 clockwise. The conical surface 17 of the mandrel is lowered axially. The conical surface 17 of the mandrel opens the conical surface 9 of the split expansion head expansion claw 1. The head boss 11 of the expansion piece 8 clamps and supports the bottom end face of the sleeve or bushing. Lift the clamp vertically upward until the sleeve or bushing is removed.

Claims

1. A jig for disassembling sleeves and bushings, characterized in that: The device includes a split expansion head expansion claw (1), a hinge joint (2), a pin (3), an outer sleeve (4), an outer sleeve handle (5), a mandrel (6), and a handle (7). The mandrel (6) is a long, thin shaft with a conical surface (17) at the bottom and a light hole (18) at the top. The handle (7) is inserted into the light hole. The outer sleeve (4) is a cylindrical structure with threads on the inner walls at both ends. The mandrel (6) and the outer sleeve (4) are connected by threads. The split expansion head expansion claw (1) and the hinge joint (2) are connected by a pin (3). The split expansion head expansion claw is conical and consists of three expansion pieces arranged in a 120° ring. One end of each expansion piece is a lug with a light hole, and the other end is a boss. The hinge joint and the outer sleeve are connected by threads. The outer sleeve handle (5) is installed on the upper end of the outer sleeve (4).

2. The sleeve and bushing disassembly fixture according to claim 1, characterized in that: The hinge joint has a ring-shaped structure with three slots evenly distributed at one end and an external thread on the outer surface of the other end, which connects to the internal thread of the outer sleeve.

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