Length-adjustable non-detachable pull rod

Abstract

The utility model belongs to the field of airplane connecting and bearing structure design, and particularly relates to a length-adjustable non-detachable pull rod. The pull rod A connector assembly comprises a first connector, a left-hand external thread section and a forward ratchet wheel section which are connected in sequence; the pull rod B connector assembly comprises a second connector, a right-handed external thread section and a reverse ratchet wheel section which are connected in sequence; the rod body comprises a left-hand internal thread section, an equal straight section and a right-hand internal thread section which are connected in sequence; wherein the left-hand internal thread section is connected with the left-hand external thread section in a meshed mode, a check ring is installed in the left-hand internal thread section, and the check ring in the left-hand internal thread section is matched with the forward ratchet wheel section to achieve one-way movement. The right-handed internal thread section is connected with the right-handed external thread section in a meshed mode, a check ring is installed in the right-handed internal thread section, and the check ring in the right-handed internal thread section is matched with the reverse ratchet wheel section to achieve one-way movement. And a hexagonal mounting head is mounted on the equal straight section. Fine adjustment of the length and the pre-tightening force of the pull rod is achieved through the ratchet mechanism.

Description

Technical Field

[0001] The present application belongs to the field of aircraft connection and load-bearing structure design, and in particular relates to an adjustable-length non-detachable pull rod. Background Art

[0002] The tie rod structure is one of the commonly used structural forms of aircraft. It mainly bears tensile and compressive loads and has the characteristics of single load transmission, clear and reliable. It is usually installed between two fixed structures, and the adjustable length is convenient for tolerance compensation during installation. At present, the adjustable length tie rods commonly used in aircraft are adjusted in length through the positive and negative threads at both ends of the tie rod. Stop rings, anti-loosening nuts and fuses are generally used to prevent the threaded connection from loosening. The inner side of the stop ring is inserted into the keyway of the tie rod joint, and the outer side is inserted into the notch of the tie rod body. After the anti-loosening nut is used to compact the stop ring, the stop washer and the anti-loosening nut are fixed by the fuse.

[0003] The installation and disassembly process of this type of tie rod is cumbersome, and it is necessary to disassemble and install the fuse, anti-loosening nut and retaining ring. The tie rod body usually has four or six symmetrical notches, and the minimum adjustment accuracy is 1 / 6 turn. The adjustment accuracy is poor, and it is difficult to apply accurate preload. In addition, since the tie rod joint has a keyway in the threaded area, the strength of the threaded connection is weakened.

[0004] Therefore, it is desired to have a technical solution to overcome or at least alleviate at least one of the above-mentioned defects of the prior art. Utility Model Content

[0005] The purpose of the present application is to provide a non-detachable pull rod with adjustable length to solve at least one problem existing in the prior art.

[0006] The technical solution of this application is:

[0007] A non-detachable pull rod with adjustable length, the pull rod comprising:

[0008] The tie rod A joint assembly comprises a first joint, a left-handed external thread section and a positive ratchet section connected in sequence;

[0009] The tie rod B joint assembly includes a second joint, a right-handed external thread section, and a reverse ratchet section connected in sequence;

[0010] The rod body comprises a left-handed internal thread section, an equal straight section and a right-handed internal thread section which are connected in sequence;

[0011] The left-handed internal thread segment is meshed and connected with the left-handed external thread segment, a stop ring is installed inside the left-handed internal thread segment, and the stop ring inside the left-handed internal thread segment cooperates with the positive ratchet segment to realize unidirectional movement;

[0012] The right-handed internal thread section is meshed and connected with the right-handed external thread section, a stop ring is installed inside the right-handed internal thread section, and the stop ring inside the right-handed internal thread section cooperates with the reverse ratchet section to realize unidirectional movement;

[0013] A hexagonal mounting head is mounted on the straight section.

[0014] In at least one embodiment of the present application, a first bushing is installed in the first joint, and the first joint is connected to the A joint by bolts.

[0015] In at least one embodiment of the present application, the first connector is a double-ear structure or a single-ear structure.

[0016] In at least one embodiment of the present application, a second bushing is installed in the second joint, and the second joint is connected to the B joint by bolts.

[0017] In at least one embodiment of the present application, the second joint is a double-ear structure or a single-ear structure.

[0018] In at least one embodiment of the present application, the stop ring includes a ring body, and a plurality of stop paddles are evenly arranged on the ring body along the circumferential direction.

[0019] In at least one embodiment of the present application, a plurality of fixing holes are evenly formed on the ring body along the circumferential direction;

[0020] A plurality of rivet holes are provided on the left-handed internal thread section and the right-handed internal thread section;

[0021] The stop rings are respectively installed inside the left-handed internal thread section and the right-handed internal thread section through rivets.

[0022] The utility model has at least the following beneficial technical effects:

[0023] The adjustable-length non-detachable pull rod of the present application not only realizes fine adjustment of the pull rod length and preload force through the ratchet mechanism, but also completes automatic locking, and the installation is convenient and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the assembly of an adjustable-length non-detachable pull rod according to one embodiment of the present application;

[0025] Figure 2 It is a schematic diagram of an adjustable-length non-detachable pull rod according to an embodiment of the present application;

[0026] Figure 3 It is a schematic diagram of a stop ring according to an embodiment of the present application.

[0027] in:

[0028] 1-pull rod; 11-pull rod A joint assembly; 111-first bushing; 112-first joint; 113-left-handed external thread section; 114-forward ratchet section; 12-stop ring; 121-ring body; 122-stop paddle; 123-fixing hole; 13-rod body; 131-left-handed internal thread section; 132-hexagonal mounting head; 133-equal straight section; 134-rivet hole; 135-right-handed internal thread section; 14-rivet; 15-pull rod B joint assembly; 151-second bushing; 152-second joint; 153-right-handed external thread end; 154-reverse ratchet section; 2-A joint; 3-B joint; 4-bolt. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the embodiment of this application will be described in more detail below in conjunction with the drawings in the embodiment of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of this application, not all of them. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain this application, and should not be construed as limitations on this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of this application are described in detail below in conjunction with the drawings.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present application.

[0031] The following is combined with Figures 1 to 3 This application is described in further detail.

[0032] The present application provides a non-detachable pull rod with adjustable length. The pull rod 1 includes: a pull rod A joint assembly 11, a pull rod B joint assembly 15 and a rod body 13.

[0033] Specifically, Figure 2As shown, the tie rod A joint assembly 11 includes a first joint 112, a left-handed external thread section 113 and a forward ratchet section 114 connected in sequence; the tie rod B joint assembly 15 is similar to the tie rod A joint assembly 11, and the tie rod B joint assembly 15 includes a second joint 152, a right-handed external thread section 153 and a reverse ratchet section 154 connected in sequence; the rod body 13 includes a left-handed internal thread section 131, an equal straight section 133 and a right-handed internal thread section 135 connected in sequence. Among them, the left-handed internal thread section 131 is meshed and connected with the left-handed external thread section 113, and a stop ring 12 is installed inside the left-handed internal thread section 131. The stop ring 12 inside the left-handed internal thread section 131 cooperates with the forward ratchet section 114 to realize unidirectional movement; the right-handed internal thread section 135 is meshed and connected with the right-handed external thread section 153, and a stop ring 12 is installed inside the right-handed internal thread section 135. The stop ring 12 inside the right-handed internal thread section 135 cooperates with the reverse ratchet section 154 to realize unidirectional movement; a hexagonal mounting head 132 is installed on the straight section 133.

[0034] The adjustable length non-detachable pull rod of the present application is assembled as follows Figure 1 As shown, a first bushing 111 is installed in the first joint 112, and the first joint 112 is connected to the A joint 2 through a bolt 4, and a second bushing 151 is installed in the second joint 152, and the second joint 152 is connected to the B joint 3 through a bolt 4, wherein the first joint 112 and the second joint 152 can adopt a double-ear structure or a single-ear structure. In this embodiment, the first joint 112 and the second joint 152 both adopt a double-ear structure.

[0035] In a preferred embodiment of the present application, Figure 3 As shown, the stop ring 12 includes a ring body 121, a plurality of stop paddles 122 are evenly arranged along the circumference of the ring body 12, a plurality of fixing holes 123 are evenly opened along the circumference of the ring body 121, a plurality of rivet holes 134 are opened on the left-handed internal thread segment 131 and the right-handed internal thread segment 135, and the stop ring 12 is respectively installed inside the left-handed internal thread segment 131 and the right-handed internal thread segment 135 by four rivets 14.

[0036] The adjustable length non-detachable pull rod of the present application, the stop ring 12 is installed on the rod body 13 by a rivet 14, the pull rod A joint assembly 11 is meshed and connected with the left-handed internal thread section 131 of the rod body 13 through the left-handed external thread section 113, and the forward ratchet section 114 is meshed with the stop paddle 122 of the stop ring 12 to achieve unidirectional movement, thereby ensuring the anti-loosening connection between the pull rod A joint assembly 11 and the rod body 13; the pull rod B joint assembly 15 is meshed and connected with the right-handed internal thread section 135 of the rod body 13 through the right-handed external thread section 153, and the reverse ratchet section 154 is meshed with the stop paddle 122 of the stop ring 12 to achieve unidirectional movement, thereby ensuring the anti-loosening connection between the pull rod B joint assembly 15 and the rod body 13. The number of ratchet teeth is generally adjusted to 8 to 30, corresponding to an adjustment accuracy of 1 / 8 to 1 / 32 of a circle. If the thread pitch of the tie rod A joint assembly 11 and the tie rod B joint assembly 15 is 1 mm, the adjustment accuracy of the length of the tie rod 1 is 0.0625 mm to 0.25 mm.

[0037] The adjustable length non-detachable pull rod of the present application is connected between the A joint 2 and the B joint 3 by bolts 4. The stop ring 12 is pre-fixedly connected to the rod body 13 by rivets 14. The specific installation steps are as follows:

[0038] (1) The tie rod A joint assembly 11 is engaged with the left-handed internal thread section 131 of the rod body 13 through the left-handed external thread section 113, and the positive ratchet section 114 is engaged with the stop paddle 122 of the stop ring 12, that is, the tie rod A joint assembly 11 cannot be rotated out and stops;

[0039] (2) The tie rod B joint assembly 15 is engaged and connected with the right-handed internal thread section 135 of the rod body 13 through the right-handed external thread section 153, and the tie rod B joint assembly 15 is stopped when the reverse ratchet section 154 is engaged with the stop paddle 122 of the stop ring 12, that is, the tie rod B joint assembly 15 cannot be rotated out;

[0040] (3) Connect the tie rod A joint assembly 11 (or tie rod B joint assembly 15) to the A joint 2 by means of bolts 4, and rotate the tie rod 1 around the installed bolts so that the tie rod B joint assembly 15 (tie rod A joint 11) on the other side reaches the vicinity of the B joint 3;

[0041] (4) Rotate the rod body 13 to adjust the length of the tie rod 1 until the B joint 3 can be installed into the tie rod B joint assembly 15 (tie rod A joint assembly 11) on the other side, and install the bolt 4;

[0042] (5) Use a torque wrench to install it on the hexagonal mounting head 132 of the rod body 13, and turn the wrench to make the fixed force value of the tie rod 1 reach the specified value. After the installation is completed, the tie rod 1 cannot be disassembled to prevent the user from accidentally changing the tie rod preload value.

[0043] The adjustable length non-detachable pull rod of the present application uses a ratchet for unidirectional movement to reliably prevent loosening; it can achieve automatic locking and is easy to install; it is non-detachable to prevent users from operating it incorrectly; and it can achieve high-precision adjustment of the preload force and length.

[0044] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A non-detachable pull rod with adjustable length, characterized in that: The pull rod (1) comprises: A pull rod A joint assembly (11), comprising a first joint (112), a left-handed external thread section (113) and a positive ratchet section (114) connected in sequence; A pull rod B joint assembly (15), comprising a second joint (152), a right-handed external thread section (153) and a reverse ratchet section (154) connected in sequence; The rod body (13) comprises a left-handed internal thread section (131), an equal straight section (133) and a right-handed internal thread section (135) which are connected in sequence; The left-handed internal thread section (131) is meshedly connected with the left-handed external thread section (113), a stop ring (12) is installed inside the left-handed internal thread section (131), and the stop ring (12) inside the left-handed internal thread section (131) cooperates with the positive ratchet section (114) to realize unidirectional movement; The right-handed internal thread section (135) is meshedly connected with the right-handed external thread section (153), a stop ring (12) is installed inside the right-handed internal thread section (135), and the stop ring (12) inside the right-handed internal thread section (135) cooperates with the reverse ratchet section (154) to achieve unidirectional movement; A hexagonal mounting head (132) is mounted on the straight section (133).

2. The length-adjustable non-detachable pull rod according to claim 1, characterized in that: A first bushing (111) is installed in the first joint (112), and the first joint (112) is connected to the A joint (2) via a bolt (4).

3. The length-adjustable non-detachable pull rod according to claim 2, characterized in that: The first joint (112) is a double-ear structure or a single-ear structure.

4. The length-adjustable non-detachable pull rod according to claim 1, characterized in that: A second bushing (151) is installed in the second joint (152), and the second joint (152) is connected to the B joint (3) via a bolt (4).

5. The length-adjustable non-detachable pull rod according to claim 4, characterized in that: The second connector (152) is a double-ear structure or a single-ear structure.

6. The length-adjustable non-detachable pull rod according to claim 1, characterized in that: The stop ring (12) comprises a ring body (121), and a plurality of stop paddles (122) are evenly arranged on the ring body (121) along the circumferential direction.

7. The length-adjustable non-detachable pull rod according to claim 6, characterized in that: The ring body (121) is evenly provided with a plurality of fixing holes (123) along the circumferential direction; The left-handed internal thread section (131) and the right-handed internal thread section (135) are both provided with a plurality of rivet holes (134); The stop ring (12) is respectively installed inside the left-handed internal thread section (131) and the right-handed internal thread section (135) through rivets (14).

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