Draw bar

Abstract

The utility model belongs to the technical field of traction instruments, and discloses a traction rod which comprises a rod piece set, a connecting piece, a connector and a locking piece. The rod piece set comprises a first rod piece and a second rod piece, the connecting piece is arranged on the first rod piece, the connector is arranged on the second rod piece, and the connecting piece and the connector are rotationally connected. The connector comprises a first joint part and a second joint part which are arranged on the two sides of the axis of the second rod piece respectively, the connecting piece is provided with a limiting part corresponding to the first joint part, the locking piece is movably connected to the connecting piece and comprises a locking end, and when the first joint part abuts against the limiting part, the locking end can abut against or be separated from the second joint part by moving the locking piece. The first rod piece and the second rod piece can be relatively fixed or released only by manually controlling the locking piece to move, then the traction rod can be in a working state or a folded storage state, the traction and pushing functions of the traction rod can be achieved without additionally arranging a pin and other fixing structures outside, operation is easy, and use is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of towing devices, in particular to a towing rod. Background Art

[0002] In fields such as automobile towing and aircraft towing, towing rods are widely used to achieve the towing and pushing of towed objects. In order to ensure a sufficient distance between the towing object and the towed object to guarantee safety, the towing rod usually has a long length, but this also makes it difficult to store the towing rod after towing is completed.

[0003] There are also folding towing rods in the prior art to fold and store the towing rod after towing is completed. However, when the towing rod is opened, in order to meet the structural strength of the towing rod, additional fixing parts such as pins and screws are usually required to strengthen the fixing effect of the two sections of the towing rod to achieve the functional requirements of towing and pushing of the towing rod. The structure is relatively complex and not conducive to manual operation. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a towing rod that can be opened or folded simply and quickly, and can achieve the towing and pushing functions of the towing rod without additional external fixing structures such as pins.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A towing rod, which includes:

[0007] A rod member group, which includes a first rod member and a second rod member;

[0008] A connecting member, which is arranged at one end of the first rod member close to the second rod member;

[0009] A joint, which is arranged at one end of the second rod member close to the first rod member and is rotatably connected to the connecting member. The joint includes a first engaging portion and a second engaging portion respectively arranged on both sides of the axis of the second rod member. The connecting member is provided with a limiting portion corresponding to the first engaging portion, and the limiting portion is used for abutting and limiting with the first engaging portion;

[0010] A locking member, which is movably connected to the connecting member. The locking member includes a locking end. When the first engaging portion abuts against the limiting portion, moving the locking member can make the locking end abut against or disengage from the second engaging portion.

[0011] Preferably, the locking member is rotatably connected to the connecting member, and rotating the locking member can make the locking end abut against or disengage from the second engaging portion.

[0012] Preferably, an elastic member is disposed between the locking member and the connecting member, and the elastic member is configured to drive the locking member to rotate so that the locking end abuts against the second engaging portion.

[0013] Preferably, one end of the elastic member is disposed between the rotation axis of the locking member and the locking end, and the other end is disposed on the connecting member.

[0014] Preferably, the shape of the second engaging portion fits the shape of the locking end.

[0015] Preferably, the connecting member includes a mounting plate, and the mounting plate includes a first mounting hole for mounting the locking member and a second mounting hole for mounting the joint.

[0016] Preferably, the locking member includes two rotating members and a connecting plate for connecting the two rotating members. The two rotating members are respectively disposed on both sides of the mounting plate and are rotatably connected to the mounting plate.

[0017] Preferably, the mounting plate further includes reinforcing ribs, and the reinforcing ribs are disposed on both sides of the mounting plate.

[0018] Preferably, the cross-sectional area of the joint gradually increases from the end far from the connecting member to the end close to the connecting member.

[0019] Preferably, the joint is further provided with a through hole, and the connecting member is provided with a groove corresponding to the through hole. The joint can be relatively fixed to the connecting member by a fixing member in cooperation with the through hole and the groove.

[0020] Beneficial effects:

[0021] The present utility model provides a towing bar, which includes a rod member group, a connecting member, a joint and a locking member. The rod member group includes a first rod member and a second rod member. The connecting member is disposed on the first rod member, and the joint is disposed on the second rod member. The connecting member and the joint are rotatably connected, so that the first rod member and the second rod member can rotate relative to each other. The joint includes a first engaging portion and a second engaging portion respectively disposed on both sides of the axis of the second rod member. The connecting member is provided with a limiting portion corresponding to the first engaging portion, and the limiting portion is configured to abut against and limit the first engaging portion. The locking member is movably connected to the connecting member, and the locking member includes a locking end. When the first engaging portion abuts against the limiting portion, moving the locking member can make the locking end abut against or disengage from the second engaging portion. Only by manually controlling the movement of the locking member can the first rod member and the second rod member be relatively fixed or the relative fixation be released, and further the towing bar can be in a working state or a folded and stored state. The towing and pushing functions of the towing bar can be realized without additionally providing external fixing structures such as pins, and the operation is simple and the use is convenient. Description of the Drawings

[0022] Figure 1 It is a schematic structural view of the towing bar provided by the present utility model in the working state;

[0023] Figure 2 It is a schematic structural view of the towing bar provided by the present utility model when it is folded and stored;

[0024] Figure 3 It is a front view of the connecting member of the towing bar provided by the present utility model;

[0025] Figure 4 It is a top view of the connecting member of the towing bar provided by the present utility model;

[0026] Figure 5 It is a front view of the joint of the towing bar provided by the present utility model;

[0027] Figure 6 It is a side view of the joint of the towing bar provided by the present utility model;

[0028] Figure 7 It is a top view of the joint of the towing bar provided by the present utility model;

[0029] Figure 8 It is a front view of the locking member of the towing bar provided by the present utility model;

[0030] Figure 9 It is a side view of the locking member of the towing bar provided by the present utility model.

[0031] In the figure:

[0032] 11. First rod member; 12. Second rod member; 21. Mounting plate; 211. Limiting portion; 212. First mounting hole; 213. Second mounting hole; 22. Reinforcing rib; 3. Joint; 31. First engaging portion; 32. Second engaging portion; 33. Through hole; 4. Locking member; 41. Rotating member; 42. Connecting plate; 5. Elastic member. Detailed implementation manners

[0033] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only parts related to the present utility model rather than all structures are shown in the drawings.

[0034] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0036] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] As Figures 1-9 shown, this embodiment provides a drawbar, which includes a rod member group, a connecting member, a joint 3, and a locking member 4. The rod member group includes a first rod member 11 and a second rod member 12. One of the first rod member 11 and the second rod member 12 is connected to the towing object, and the other is connected to the towed object. The connecting member is arranged at one end of the first rod member 11 close to the second rod member 12, and the joint 3 is arranged at one end of the second rod member 12 close to the first rod member 11 and is rotatably connected to the connecting member. Therefore, the first rod member 11 and the second rod member 12 can rotate relative to each other around the connection between the connecting member and the joint 3.

[0038] Specifically, it may be that the first rod member 11 is relatively fixed to the towing object, and the second rod member 12 rotates around the connection between the connecting member and the joint 3; or it may be that the second rod member 12 is relatively fixed to the towing object, and the first rod member 11 rotates around the connection between the connecting member and the joint 3; or it may also be that the entire drawbar is removed from between the towing object and the towed object and folded for storage. This embodiment does not make any limitation thereto.

[0039] The joint 3 includes a first joint portion 31 and a second joint portion 32 respectively disposed on both sides of the axis of the second rod 12. The connecting member is correspondingly provided with a limiting portion 211 for the first joint portion 31. The limiting portion 211 is used for abutting and limiting with the first joint portion 31. The locking member 4 is movably connected to the connecting member. The locking member 4 includes a locking end. When the first joint portion 31 abuts against the limiting portion 211, moving the locking member 4 can make the locking end abut against or disengage from the second joint portion 32.

[0040] When the towing bar is in the working state, the axial directions of the first rod 11 and the second rod 12 are on the same straight line. The limiting portion 211 abuts against the first joint portion 31, and the locking end abuts against the second joint portion 32. The first rod 11 and the second rod 12 are relatively fixed and cannot rotate relative to each other. When the force between the two rods is a tensile force, the tensile force can be conducted through the connection between the connecting member and the joint 3. When the force between the two rods is a compressive force, the compressive force can be jointly conducted through the connection between the connecting member and the joint 3, the limiting portion 211 and the first joint portion 31, and the locking member 4 and the second joint portion 32, so that the whole towing bar can be used for both towing and pushing. When the towing bar needs to be folded and stored after the work is completed, moving the locking member 4 makes the locking end disengage from the second joint portion 32, then the first rod 11 and the second rod 12 can rotate relative to each other. The setting of the movable locking member 4 enables the towing bar not to require an additional fixing structure to ensure the towing and pushing functions of the towing bar. Moving the locking member 4 can also simply and efficiently complete the transformation of the shape of the towing bar.

[0041] Further, the first rod 11 is relatively fixed to the towing object and is located in the horizontal plane. The limiting portion 211 is located on the lower side of the towing bar, and the locking member 4 is located on the upper side of the towing bar. After the locking end disengages from the second joint portion 32, the second rod 12 can rotate upward and be perpendicular to the first rod 11. At this time, the length of the second rod 12 itself will not have an impact in the horizontal direction.

[0042] Specifically, the locking member 4 is rotatably connected to the connecting member. Rotating the locking member 4 can make the locking end abut against or disengage from the second joint portion 32. When changing the shape of the towing bar, only by rotating the locking member 4 can the first rod 11 and the second rod 12 be relatively locked or unlocked.

[0043] Furthermore, an elastic member 5 is disposed between the locking member 4 and the connecting member. The elastic member 5 is configured to drive the locking member 4 to rotate so that the locking end abuts the second engaging portion 32. When the traction rod transitions from the folded and stored state to the operating state, the axes of the first and second rods 11, 12 return to the same straight line under the action of an external force, and the locking member 4, under the elastic force of the elastic member 5, abuts the locking end of the locking member 4 against the second engaging portion 32. In other words, during manual operation, the traction rod can be switched to the operating state by simply moving the first or second rod 11, 12. The locking member 4 automatically secures the first and second rods 11, 12, which is convenient and quick. Furthermore, when the traction rod is operating, the elastic force of the elastic member 5 secures the locking member 4, preventing the locking end from disengaging from the second engaging portion 32 under the action of a slight external force, causing the first and second rods 11, 12 to rotate relative to each other and thereby disable the traction rod function.

[0044] Furthermore, one end of the elastic member 5 is positioned between the rotation axis of the locking member 4 and the locking end, and the other end is positioned on the connecting member. The elastic member 5 may be a tension spring. When the locking end abuts the second engaging portion 32, the tension spring's length remains at or slightly longer than its original length. As the locking end disengages from the second engaging portion 32 and gradually moves away from the second engaging portion 32, the tension spring's length gradually increases. At this point, the tension spring continuously provides tension to the locking member 4, causing it to rotate. When the axes of the first and second rods 11, 12 are aligned again, the tension spring allows the locking end of the locking member 4 to abut against the second engaging portion 32.

[0045] Specifically, the second engaging portion 32 matches the shape of the locking end. Because the second engaging portion 32 and the locking end need to relatively secure the first rod 11 and the second rod 12, this conformity ensures uniform force distribution between the two and prevents relative slippage. Furthermore, the locking end is curved, further increasing the contact area with the second engaging portion 32.

[0046] Specifically, the connection portion includes a mounting plate 21, which includes a first mounting hole 212 for mounting the locking member 4 and a second mounting hole 213 for mounting the connector 3. Both the locking member 4 and the connector 3 are mounted on the mounting plate 21. The solid plate-like structure of the mounting plate 21 provides high structural strength and is less susceptible to structural deformation that could affect the function of the drawbar.

[0047] Further, the locking member 4 includes two rotating members 41 and a connecting plate 42 for connecting the two rotating members 41. The two rotating members 41 are respectively arranged on both sides of the mounting plate 21 and are rotatably connected to the mounting plate 21. The connecting plate 42 connects the two rotating members 41 into a whole, and the connecting plates 42 on both sides can abut against the second engaging portion 32 so that the forces on both sides of the locking member 4 are evenly distributed. At the same time, when folding and storing the towing bar, the locking member 4 can be rotated integrally by manually holding the connecting plate 42 to release the relative fixation between the first rod 11 and the second rod 12.

[0048] Furthermore, the mounting plate 21 further includes reinforcing ribs 22 which are arranged on both sides of the mounting plate 21. The reinforcing ribs 22 are integrally formed with the mounting plate 21, and the reinforcing ribs 22 on both sides can strengthen the anti-bending ability of the mounting plate 21 itself and enhance the structural strength of the connecting part between the first rod 11 and the second rod 12.

[0049] Specifically, the cross-sectional area of the joint 3 gradually increases from the end far away from the connecting member to the end close to the connecting member. The stress is relatively concentrated at the joint 3. The gradually increasing cross-sectional area of the joint 3 from the end far away from the connecting member to the end close to the connecting member helps to enhance the structural strength of the joint 3 and avoid bending in the middle of the towing bar. Further, the joint 3 is provided with a receiving cavity for receiving the connecting plate 42, the second mounting hole 213 is located in the receiving cavity, and mounting avoidance holes are provided on both side walls of the receiving cavity. A pin shaft passes through the mounting avoidance hole and the second mounting hole 213 to rotatably connect the joint 3 with the connecting member. At this time, the gradually increasing cross-sectional area of the joint 3 from the end far away from the connecting member to the end close to the connecting member can ensure that there is still enough contact area between the joint 3 and the connecting member and the locking member 4, ensuring the stability of the connection.

[0050] Furthermore, both the locking member 4 and the joint 3 are rotatably connected to the connecting member by a pin shaft. A washer is arranged between the pin shaft and the surface of the connecting member, and the washer plays a buffering role. At the same time, two threaded holes are correspondingly arranged at each pin shaft, and a bolt passes through the threaded hole to fix the pin shaft.

[0051] Specifically, the joint 3 is further provided with a through hole 33, and the connecting member is correspondingly provided with a groove for the through hole 33. The joint 3 can be relatively fixed to the connecting member by a fixing member in cooperation with the through hole 33 and the groove. When the towing bar is folded and stored, the fixing member passes through the through hole 33 and the groove in sequence to be relatively fixed, so that the first rod 11 and the second rod 12 are kept in a folded state and are prevented from returning to the working state. The fixing member can be a screw, the groove is provided with internal threads, and the screw is threadedly connected with the internal threads. The fixing member can also be a clamping member or other structures, and the present embodiment does not limit this.

[0052] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A drawbar, characterized in that, Comprising: A group of rods, said group of rods including a first rod (11) and a second rod (12); A connecting member, said connecting member being provided at one end of the first rod (11) close to the second rod (12); A joint (3), said joint (3) being provided at one end of the second rod (12) close to the first rod (11) and being rotatably connected to the connecting member. The joint (3) includes a first engaging portion (31) and a second engaging portion (32) respectively provided on both sides of the axis of the second rod (12). The connecting member is provided with a limiting portion (211) corresponding to the first engaging portion (31), and the limiting portion (211) is used for abutting and limiting with the first engaging portion (31); A locking member (4), said locking member (4) being movably connected to the connecting member. The locking member (4) includes a locking end. When the first engaging portion (31) abuts against the limiting portion (211), moving the locking member (4) can make the locking end abut against or disengage from the second engaging portion (32).

2. The drawbar according to claim 1, wherein, The locking member (4) is rotatably connected to the connecting member, and rotating the locking member (4) can make the locking end abut against or disengage from the second engaging portion (32).

3. The drawbar according to claim 2, characterized in that, An elastic member (5) is provided between the locking member (4) and the connecting member, and the elastic member (5) is used to drive the locking member (4) to rotate so that the locking end abuts against the second engaging portion (32).

4. The drawbar according to claim 3, characterized in that, One end of the elastic member (5) is provided between the rotation axis of the locking member (4) and the locking end, and the other end is provided on the connecting member.

5. The drawbar according to claim 1, characterized in that, The shape of the second engaging portion (32) fits with the locking end.

6. The drawbar according to claim 1, wherein, The connecting member includes a mounting plate (21), and the mounting plate (21) includes a first mounting hole (212) for mounting the locking member (4) and a second mounting hole (213) for mounting the joint (3).

7. The drawbar according to claim 6, wherein The locking member (4) includes two rotating members (41) and a connecting plate (42) for connecting the two rotating members (41). The two rotating members (41) are respectively provided on both sides of the mounting plate (21) and are rotatably connected to the mounting plate (21).

8. The drawbar according to claim 6, characterized in that, The mounting plate (21) further includes reinforcing ribs (22), and the reinforcing ribs (22) are provided on both sides of the mounting plate (21).

9. The drawbar according to any one of claims 1 to 8, characterized in that, The cross-sectional area of the joint (3) gradually increases from the end far from the connecting member to the end close to the connecting member.

10. The drawbar according to any one of claims 1-8, characterized in that, The joint (3) is further provided with a through hole (33). The connecting member is provided with a groove corresponding to the through hole (33). The joint (3) can be relatively fixed to the connecting member through a fixing member in cooperation with the through hole (33) and the groove.

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