Process pull rod suitable for narrow space and capable of adjusting screwing-in depth
By designing a process tie rod suitable for confined spaces, and utilizing a combination structure of joints, sleeves, and threaded rods, the problem of cumbersome screwing depth adjustment in helicopter assembly was solved, enabling continuous adjustment without disassembly and improving the accuracy and efficiency of adjustment.
Patent Information
- Application Number
- CN202520168512.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-24
AI Technical Summary
In helicopter assembly, when adjusting the screw-in depth of the forked lug in a confined space, repeated disassembly and reassembly are labor-intensive and the adjustment effect is uncontrollable.
Design a process tie rod suitable for confined spaces, including a connector, a sleeve, and a threaded rod. The screwing depth is adjusted by rotating the sleeve, and the connector is fixed to the hole shaft of the sleeve by a connecting block and screws, so as to achieve continuous adjustment without disassembly.
It enables continuous adjustment of screw-in depth in confined spaces without disassembly, simplifying the adjustment process and improving the accuracy and efficiency of adjustment.
Smart Images
Figure CN223849163U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of helicopter assembly, and particularly relates to a process pull rod suitable for a narrow space and capable of adjusting a screwing depth. BACKGROUND
[0002] In the field of helicopter assembly, there is a situation that a forked lug body (external thread) needs to be adjusted to screw into another forked lug body (internal thread) to a depth, and the rotation of the end forked lug is limited. The adjustment of the screwing depth needs to be repeated several times to meet the design requirements, which leads to the repeated disassembly and assembly of the bolts at the forked lug. If this work is implemented in an open space, it is relatively easy, but when it is implemented in a narrow space of a helicopter, the repeated adjustment workload is huge, and the adjustment effect is uncontrollable. CONTENT OF THE UTILITY MODEL
[0003] The application aims to design a process pull rod suitable for a narrow space and capable of adjusting a screwing depth without disassembly.
[0004] The application provides a process pull rod suitable for a narrow space and capable of adjusting a screwing depth, which comprises:
[0005] a joint, one end of the joint is provided with a forked lug, the other end of the joint is provided with a cavity, the outside of the cavity is provided with a boss, and the forked lug is connected with a fairing;
[0006] a sleeve rod, one end of the sleeve rod is sleeved on the boss, and the other end of the sleeve rod is provided with a threaded hole; wherein the sleeve rod can rotate around the boss;
[0007] a threaded rod, one end of the threaded rod is connected with the threaded hole, and the other end of the threaded rod is connected with an exhaust pipe.
[0008] Preferably, when the sleeve rod is rotated, one end of the threaded rod starts to shrink into the cavity, so as to adjust the distance between the fairing and the exhaust pipe.
[0009] Preferably, the pull rod further comprises:
[0010] a connecting block, which is arranged on the joint and can rotate around the joint;
[0011] a screw, which is used to connect the connecting block and the sleeve rod.
[0012] Preferably, the connecting block is composed of two half-ring plates.
[0013] Preferably, the half-ring plate is provided with a screw hole, and the screw hole is used to install the screw.
[0014] Preferably, the sleeve rod is further provided with a hexagonal block; wherein when the hexagonal block is rotated by a wrench, the sleeve rod rotates.
[0015] The beneficial technical effects of the present application are:
[0016] The present application makes a real installed 1 fork ear end rotation limited rod into a tool, which is divided into a joint and a sleeve rod 2 parts, and the two parts are connected by hole shaft cooperation and a connecting block (which needs to be cut into two halves). By fixing the connecting block to the sleeve rod to press the boss on the joint, the boss height is slightly smaller than the sleeve rod hole depth, which realizes the function of adjusting the screw rod into the sleeve rod depth by only rotating the sleeve rod. After adjusting to meet the requirements, measure the overall length, and detach the process rod from the machine, adjust the installed rod to the same depth as the process rod.
[0017] If it is a formal rod, it needs to be disassembled every time, and the present method can be continuously adjusted without disassembly until it meets certain design requirements. It can effectively solve the problem of huge workload of adjusting the screw-in depth and uncontrollable adjustment effect. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is an isometric view of the tool assembled by the embodiment of the present application;
[0019] Figure 2 is a cross-sectional view of the tool assembled by the embodiment of the present application;
[0020] Figure 3 is a schematic view of the connecting block provided by the embodiment of the present application;
[0021] Figure 4 is a cross-sectional view of the joint provided by the embodiment of the present application;
[0022] Figure 5 is a cross-sectional view of the sleeve rod provided by the embodiment of the present application;
[0023] Figure 6 is an isometric view of the sleeve rod provided by the embodiment of the present application. DETAILED DESCRIPTION
[0024] Please refer to Figure 1 and Figure 2 , the process rod provided by the present application comprises a joint 1, a connecting block 2, a sleeve rod 3, and a screw 4 (the screw is not shown).
[0025] The joint 1 (see Figure 4 ), the sleeve rod 3 (see Figure 5 , Figure 6) two are hole shaft matching, the shaft (essentially a boss) on the joint 1 size is φ16f7, thickness is 4, the hole (essentially a groove) on the sleeve rod 3 size is φ16H8, depth is 4 (+0.02, +0.1), clearance fit between the two. And the hole depth is slightly larger than the thickness of the shaft boss.
[0026] Further, the use of connecting block 2 (see Figure 3 ) to press the joint 1, sleeve rod 3 hole shaft matching. Both can avoid the two, but also to ensure that the joint 1, sleeve rod 3 can be independent rotation.
[0027] Further, in the connecting block 2 (see Figure 3 ) to make 4-φ5H7 evenly distributed through hole, on the sleeve rod 3 to make 4-M5 evenly distributed threaded hole, the above evenly distributed hole radius is the same. Use screw 4 through the connecting block 2 into the sleeve rod 3, so as to ensure the content of the last paragraph.
[0028] Further, this process rod is divided into 2 segments, combined by special structure, instead of the separate rod installed in the machine, so that only one segment can be rotated to adjust the depth of screwing. If it is a formal rod, it needs to be disassembled every time to adjust, but this method does not need to be disassembled and can be continuously adjusted until it meets the design requirements.
[0029] Further, in order to ensure sufficient depth of screwing, not only M6X1 thread is provided on the sleeve rod 3, but also D8 hole is made in the center of the joint 1 to avoid the M6 screw, so as to provide sufficient depth of screwing. See Figure 2 .
[0030] In other embodiments of the present application, a process rod is designed to replace the rod installed in the machine, which is suitable for narrow space and does not need to be disassembled to adjust the depth of screwing. Two forked rod bodies, the upper one is internal thread and the lower one is external thread, the overall length is changed by adjusting the depth of screwing of the two, and then the position or posture of the object hung below is adjusted. Since the rotation of the two forked ears is limited, the structure connecting member needs to be disassembled every time to adjust the forked rod body, and the adjustment work is complicated and difficult to judge accurately.
[0031] Note: this process rod replaces the upper forked rod body (internal thread).
[0032] The process rod is installed instead of the machine part. One end is connected with the machine structure and the other end is connected with the forked rod body (external thread). At this time, please screw the spare nut into the forked rod body (external thread) in advance.
[0033] The wrench torque area is arranged on the sleeve rod. The sleeve rod is rotated by using the wrench to twist the area, and the joint and the body structure cannot rotate at this time. Thus, the depth of the screw is changed, and the entire adjustment process is linear and continuous. The operator can adjust until the parameters required by the design document.
[0034] After the adjustment is qualified, the tightening nut (a mounted part) installed at the forked ear rod body (external thread) in the previous step is tightened. Thus, the adjustment result is locked.
[0035] The process pull rod is detached from the machine, and the depth of the screw of the mounted pull rod is adjusted to be consistent with the process pull rod. If necessary, a vernier caliper can be used for measurement to ensure consistency.
[0036] In summary, the use of the process pull rod not only realizes the adjustment of the depth of the screw without disassembly, but also realizes a linear and continuous adjustment process, which is simple and convenient. Moreover, the process pull rod has a small size and is suitable for narrow spaces.
Claims
1. A process rod suitable for use in a tight space and adjustable in screwing depth, characterized in that, The pull rod comprises: a joint, one end of which is provided with a fork, and the other end of which is provided with a cavity, the outside of the cavity being provided with a boss, the fork being connected with the fairing; a sleeve rod, one end of which is sleeved on the boss, and the other end of which is provided with a threaded hole; wherein the sleeve rod can rotate around the boss; a threaded rod, one end of which is connected with the threaded hole, and the other end of which is connected with the exhaust pipe.
2. The tie rod of claim 1, wherein, When the sleeve rod is rotated, one end of the threaded rod begins to shrink into the cavity, thereby adjusting the distance between the fairing and the exhaust pipe.
3. The tie rod of claim 1, wherein, The pull rod further comprises: a connecting block, which is arranged on the joint and can rotate around the joint; a screw, which is used to connect the connecting block with the sleeve rod.
4. The tie rod of claim 3, wherein, The connecting block is composed of two half-ring plates.
5. The tie rod of claim 4, wherein, Screw holes are arranged on the half-ring plates, which are used to install the screw.
6. The tie rod of claim 2, wherein, A hexagonal block is further arranged on the sleeve rod; wherein when a wrench rotates the hexagonal block, the sleeve rod rotates.