Swing arm mechanism of wheel fixer

Abstract

The utility model provides a swing arm mechanism of a wheel fixator, and belongs to the technical field of logistics binding tools. The wheel fixer solves the problem of how to improve the operation smoothness of the wheel fixer. In the swing arm mechanism of the wheel fixator, the wheel fixator comprises a carrying table rotationally connected with a rotating shaft, a guide arm is arranged on the carrying table, the swing arm mechanism comprises a spring, a connecting shaft fixedly connected with the rotating shaft and a connecting base fixedly connected with the guide arm, and an inserting groove is formed in the connecting base. The spring is located in the inserting groove, one end of the spring is fixedly connected with the connecting base, the connecting shaft stretches into the inserting groove and is fixedly connected with the other end of the spring, a guide base is fixedly arranged outside the connecting shaft, the guide base covers one end of the connecting base, a guide rod parallel to the spring is fixed outside the connecting base, and the guide rod is fixedly connected with the spring. And the guide rod is connected with the guide seat in a sliding manner. The swing arm mechanism of the wheel fixer can improve the operation smoothness of the wheel fixer.

Description

Technical Field

[0001] This utility model belongs to the technical field of logistics binding tools, and relates to a swing arm mechanism for a wheel fastener. Background Technology

[0002] Wheel clamps are devices used to secure car tires during vehicle transportation.

[0003] For example, a car tire binding device disclosed in Chinese Patent (Authorization Announcement No.: CN222522924U) includes a platform, a winding shaft, a binding strap, and a winding drive. The winding drive can drive the winding shaft to rotate so that the binding strap is wound up. A swing arm that can swing in the front-back direction of the platform is rotatably connected above the platform. The swing arm is driven by a swing arm drive. A guide arm that extends in the left-right direction of the platform is fixed at the movable end of the swing arm. The guide arm is connected to the movable end of the binding strap. A clearance opening is provided on the upper surface of the platform. The guide arm can swing with the swing arm and enter the clearance opening. A clamping block is provided at the clearance opening. A locking drive can drive the clamping block to move and lock the guide arm in the clearance opening.

[0004] As can be seen from Figure 6 and paragraph 0033 of the specification, the swing arm includes a tubular swing rod and a telescopic rod. The telescopic rod is slidably inserted into the swing rod. A spring is connected between the swing rod and the telescopic rod, which enables the telescopic rod to always have a contraction tendency. In other words, during the rotation of the swing arm, the elastic force of the spring is used to make the telescopic rod slide adaptively relative to the swing rod, so as to ensure that the length of the swing arm can be adjusted according to the position of the guide arm.

[0005] pass Figure 5 As can be seen from the structure in Figure 6, the outer wall of the telescopic rod and the inner wall of the swing rod are in a close fit. Only in this way can the telescopic direction of the swing arm be guided. However, the bias force generated during the swing will act between the telescopic rod and the swing rod, causing the telescopic rod to get stuck during the telescopic adjustment process, resulting in poor operation smoothness. Summary of the Invention

[0006] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing a swing arm mechanism for a wheel retainer. The technical problem to be solved by this utility model is: how to improve the smoothness of operation of the wheel retainer.

[0007] The objective of this utility model can be achieved through the following technical solution: a swing arm mechanism for a wheel retainer, the wheel retainer including a platform rotatably connected to a rotating shaft, and a guide arm provided on the platform, the swing arm mechanism including a spring, a connecting shaft fixedly connected to the rotating shaft, and a connecting seat fixedly connected to the guide arm and having a slot inside, the spring being located in the slot and one end being fixedly connected to the connecting seat, characterized in that the connecting shaft extends into the slot and is fixedly connected to the other end of the spring, a guide seat is fixedly provided outside the connecting shaft, and the guide seat covers one end of the connecting seat, a guide rod parallel to the spring is fixedly provided outside the connecting seat, and the guide rod and the guide seat are slidably connected.

[0008] The working principle of the swing arm mechanism of this wheel retainer is as follows: A hydraulic motor, in conjunction with a worm gear assembly and a reduction gear assembly, drives the rotating shaft to rotate. The connecting shaft rotates synchronously with the rotating shaft, causing the connecting seat to swing along with it. The connecting seat drives the guide arm to pull the binding strap around the wheel, swinging from one end of the platform to the other end and positioning it, thus pressing the binding strap tightly against the wheel. The springs installed in the slot are compressed and expanded during the swinging of the connecting shaft and the connecting seat, allowing the combined length of the connecting shaft and the connecting seat to be adjusted according to the position of the guide arm. Furthermore, this application adds a guide seat fixed outside the connecting shaft and a guide rod fixed outside the connecting seat, slidingly connecting the guide rod and the guide seat together. This allows the connecting seat and the connecting shaft to swing together. During the process, the connecting shaft continuously extends into the slot and compresses the spring to make it contract. During this process, the sum of the lengths of the connecting seat and the guide seat continuously shortens. At the same time, the guide seat guides the guide rod, so that the sliding direction between the connecting seat and the guide seat does not change, and it ensures that the connecting shaft and the guide seat will not come into contact and generate friction due to the deviation of the sliding direction. This ensures that the contraction direction of the spring always remains on the original path. When the swing arm mechanism contracts to its limit and is released and extended, the spring can fully exert its function to continuously push the connecting seat and the guide arm connected to the connecting seat to slide smoothly outward relative to the connecting shaft and the guide seat, and finally make the guide arm embed into the clearance of the platform. This effectively prevents the jamming situation that may exist in the prior art and improves the smoothness of the wheel retainer operation.

[0009] In the aforementioned wheel retainer swing arm mechanism, the connecting seat includes a connecting block snapped onto the guide arm and a connecting sleeve extending through both ends. The connecting sleeve is fixed to the connecting block and forms a slot with the connecting block. A locating pin, passing through the spring, is radially connected to one end of the connecting sleeve near the bottom wall of the slot. This split-type connecting seat effectively reduces the production cost of the device, and the locating pin ensures the spring is firmly positioned within the connecting sleeve, preventing the connecting seat and guide arm from separating from the guide seat and connecting shaft due to elastic force during the swing arm mechanism's extension movement.

[0010] In the aforementioned wheel retainer swing arm mechanism, the outer wall of the connecting block has two opposing and outwardly protruding connecting plates. Two guide rods are fixed to the two connecting plates. The guide seat includes a guide sleeve surrounding the connecting shaft and a front cap fixed to one end of the guide sleeve. The outer wall of the front cap has two opposing and outwardly protruding protrusions, each of which is fitted with a linear bearing. The two guide rods are slidably connected to the two linear bearings in a one-to-one correspondence. Specifically, using the connecting block to support the guide rods allows for sufficient clearance between the connecting sleeve and the guide sleeve, preventing interference between the guide rod and the guide sleeve during the sliding of the connecting shaft within the slot. The guide seat, with the guide sleeve as its main body, is designed as a separate unit from the front cap, achieving low-cost manufacturing. The sliding engagement of the linear bearing mounted on the protrusion of the front cap with the guide rod effectively reduces the interference force generated during the engagement between the guide rod and the guide seat, ensuring smooth operation of the device during swinging and extension.

[0011] In the aforementioned wheel clamp swing arm mechanism, the guide seat further includes a guide flange sleeved on the connecting sleeve, and the guide flange is fixedly connected to the front cover. The guide flange enhances the structural strength of the free end of the guide seat and, through the sliding fit between the guide flange and the connecting sleeve, further guides the swinging and telescopic movements of the device, improving the smoothness of the wheel clamp's operation.

[0012] In the aforementioned wheel retainer swing arm mechanism, a swing seat is fixed on the rotating shaft, one end of the connecting shaft is fixedly connected to the swing seat, a rear cover surrounding the connecting shaft is fixedly connected to the swing seat, and the other end of the guide sleeve is fixedly connected to the rear cover. The swing seat effectively ensures torque transmission between the rotating shaft and the connecting shaft, and the rear cover ensures the connection stability between the guide sleeve and the swing seat. Furthermore, it effectively isolates the connecting shaft and spring from the outside environment, preventing dust accumulation from affecting their operation.

[0013] In the aforementioned wheel retainer swing arm mechanism, a protruding locking post is provided on the end face of the other end of the connecting shaft. The outer diameter of the locking post is smaller than the outer diameter of the connecting shaft, and the spring is locked onto the locking post. During assembly, the locking post and the spring can be locked together, ensuring the connection strength between the connecting shaft and the spring. In addition, the other end of the spring itself is positioned by a locating pin, thereby ensuring the connection stability of the two ends of the spring and ensuring that the elastic function can be fully exerted. As a further preferred option, a threaded groove can be tapped on the outer peripheral wall of the locking post to limit the end of the spring, thereby improving the tightness of the connection between the connecting shaft and the spring.

[0014] In the aforementioned wheel retainer swing arm mechanism, a limit cap is connected to one end of each guide rod that passes through the linear bearing. The limit cap restricts the amount of sliding between the guide rod and the linear bearing, preventing excessive elastic force from causing the guide rod to disengage from the linear bearing.

[0015] In the aforementioned wheel retainer swing arm mechanism, guide plates are provided on both sides of the connecting seat on the platform. The two ends of the rotating shaft are rotatably connected to the two guide plates. Two rollers with circumferentially oriented annular grooves are rotatably connected to the guide arm. The two guide plates are embedded in the two annular grooves and abut against the rollers. In conjunction with the above solution, this application assembles rollers on the guide arm. During the operation of the swing mechanism, the circumferential annular grooves of the rollers, in cooperation with the two guide plates, assist in correcting the overall swing direction of the swing mechanism, thus providing a certain guiding effect.

[0016] Compared with existing technologies, the swing arm mechanism of this wheel retainer has the following advantages:

[0017] By slidingly connecting the guide rod mounted on the connecting seat and the linear bearing mounted on the guide seat, during the process of the swing arm mechanism retracting under the drive of the hydraulic motor and extending under the action of the spring, it is ensured that the connecting shaft and the guide seat will not come into contact and generate friction due to the deviation of the sliding direction, thus preventing the jamming situation that may exist in the prior art and improving the smoothness of the wheel retainer operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the swing arm mechanism of this wheel retainer.

[0019] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0020] Figure 3 This is a side view of the swing arm mechanism of this wheel retainer.

[0021] Figure 4yes Figure 3 A partial sectional view cut along the AA direction.

[0022] Figure 5 yes Figure 4 A magnified view of a section at point B.

[0023] In the diagram, 1. Platform; 11. Rotating shaft; 111. Connecting shaft; 1111. Snap-fit ​​post; 112. Swing seat; 1121. Rear cover; 12. Guide arm; 121. Roller; 1211. Annular groove; 13. Guide plate; 2. Spring; 3. Connecting seat; 31. Slot; 32. Guide rod; 321. Limit cap; 33. Connecting block; 331. Connecting plate; 34. Connecting sleeve; 341. Positioning pin; 4. Guide seat; 41. Guide sleeve; 42. Front cover; 421. Protrusion; 4211. Linear bearing; 43. Guide flange. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] like Figure 1-3 As shown, in the swing arm mechanism of this wheel retainer, the wheel retainer includes a platform 1 with clearance openings near both ends of its surface, and a guide arm 12 movably connected to the platform 1 and capable of being fitted into any one of the clearance openings. Two guide plates 13 with their sides facing each other are vertically fixed on the platform 1. A rotating shaft 11 is rotatably connected between the two guide plates 13. The swing arm mechanism includes a spring 2, a connecting shaft 111 fixedly connected to the rotating shaft 11, and a connecting seat 3 fixedly connected to the guide arm 12 and having an internal slot 31. Figure 4 The connecting seat 3 specifically includes a connecting block 33 and a tubular connecting sleeve 34. The connecting block 33 is clamped and fixed to one end of the guide arm 12, and a groove perpendicular to the center line of the guide arm 12 is opened on its surface. The connecting sleeve 34 is inserted into the groove and welded and fixed, so that the two together form a slot 31. A positioning pin 341 is radially mounted on the inner side wall of the connecting sleeve 34 near the bottom wall of the slot 31. Specifically, a hole can be opened in the side wall of the sleeve and it can be installed by snap-fit. The spring 2 is inserted into the slot 31 and one end is connected to the spring 34. The bottom wall of the groove 31 abuts against the spring 2 and passes radially through the gap of the spring 2 via the positioning pin 341, thereby positioning one end of the spring 2 in the groove 31. A swing seat 112 is assembled on the rotating shaft 11 by key connection. One end of the connecting shaft 111 is welded and fixed to the swing seat 112, and the other end extends into the groove 31. The end face of the connecting shaft 111 extending into the groove 31 has a protruding cylindrical locking post 1111 with an outer diameter smaller than that of the connecting shaft 111. The connecting shaft 111 is locked and fixed to the other end of the spring 2 by the locking post 1111.

[0026] like Figure 4 As shown, there are two connecting plates 331 protruding from their outer walls and arranged opposite each other on the side wall of the connecting block 33. Each connecting plate 331 has a connecting hole, and a guide rod 32 arranged parallel to the spring 2 is fixed in each connecting hole. The guide seat 4 includes a square tube-shaped guide sleeve 41. A rear cover 1121 surrounding the connecting shaft 111 is screwed onto the swing seat 112. The rear end of the guide sleeve 41 and the rear cover 1121 are snapped together and welded together. The guide seat 4 also includes an annular front cover 42. The front cover 42 is snapped onto the front end of the guide sleeve 41 and welded together. The connecting sleeve passes through the front cover 42 and extends into the guide sleeve 41. The outer side wall of the front cover 42 has two protrusions 421 that protrude from its outer wall and are arranged opposite each other. Each protrusion 421 has an installation channel. A linear bearing 4211 is snapped into each installation channel. Two guide rods 32 are slidably connected to the two linear bearings 4211 one by one. In addition, a limit cap 321 is snapped into one end of each guide rod 32 that passes through the linear bearing 4211. The guide seat 4 also includes a tubular guide flange 43 with an installation edge at one end along the circumference. The guide flange 43 is sleeved on the outside of the connecting sleeve 34 and its inner circumferential wall is in contact with the outer circumferential wall of the connecting sleeve 34. The installation edge of the guide flange 43 and the front cover 42 are fixed by screws.

[0027] Combination Figure 5 Two rollers 121 are rotatably connected to the guide arm 12. The two rollers 121 are located on both sides of the connecting block 33 and are opposite to the positions of the two guide plates 13. Each roller 121 has an annular groove 1211 along the circumference. Each guide plate 13 is embedded in the annular groove 1211 of each roller 121.

[0028] Working principle: When power is transmitted to the rotating shaft 11, the rotating shaft 11 drives the swing seat 112 to swing synchronously, causing the guide seat 4 and the connecting shaft 111 to move synchronously. During this process, the guide seat 4 pulls the connecting seat 3 and the guide arm 12 to swing together. During this process, the two rollers 121 roll along the edges of the two guide plates 13. At this time, the spring 2 is continuously squeezed and contracted by the connecting shaft 111 towards the inner bottom wall of the slot 31. Due to the sliding fit between the guide rod 32 and the linear bearing 4211, as well as the sliding fit between the guide flange 43 and the connecting sleeve 34, the sliding direction of the connecting seat 3 is always maintained. On a straight line, ensuring that the elastic force of spring 2 always remains in a uniform direction, after the rotating shaft 11 rotates and the roller 121 rolls to the midpoint of the guide plate 13, the compression stroke of spring 2 ends. At this time, the reaction force of spring 2 pushes the connecting seat 3 to continuously extend out of the guide sleeve 41 of the guide seat 4 (at this time, the connecting shaft 111 also continuously extends out of the slot 31). With the sliding cooperation of the guide rod 32 and the linear bearing 4211, as well as the sliding cooperation of the guide flange 43 and the connecting sleeve 34, it is ensured that the connecting seat 3 can extend smoothly and finally allow the guide arm 12 to be inserted from the relief opening at one end of the platform 1 into the relief opening at the other end of the plate.

[0029] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0030] Although this document frequently uses terms such as platform 1, rotating shaft 11, connecting shaft 111, snap-fit ​​post 1111, swing seat 112, rear cover 1121, guide arm 12, roller 121, annular groove 1211, guide plate 13, spring 2, connecting seat 3, slot 31, guide rod 32, limit cap 321, connecting block 33, connecting plate 331, connecting sleeve 34, positioning pin 341, guide seat 4, guide sleeve 41, front cover 42, protrusion 421, linear bearing 4211, and guide flange 43, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A swing arm mechanism for a wheel retainer, the wheel retainer comprising a platform (1) rotatably connected to a rotating shaft (11), and a guide arm (12) provided on the platform (1), the swing arm mechanism comprising a spring (2), a connecting shaft (111) fixedly connected to the rotating shaft (11), and a connecting seat (3) fixedly connected to the guide arm (12) and having a slot (31) inside, the spring (2) being located in the slot (31) and having one end fixedly connected to the connecting seat (3), characterized in that, The connecting shaft (111) extends into the slot (31) and is fixedly connected to the other end of the spring (2). A guide seat (4) is fixedly provided outside the connecting shaft (111), and the guide seat (4) covers one end of the connecting seat (3). A guide rod (32) parallel to the spring (2) is fixed outside the connecting seat (3), and the guide rod (32) and the guide seat (4) are slidably connected.

2. The swing arm mechanism of the wheel retainer according to claim 1, characterized in that, The connecting seat (3) includes a connecting block (33) that is snapped onto the guide arm (12) and a connecting sleeve (34) that extends through both ends. The connecting sleeve (34) is fixed on the connecting block (33) and forms the slot (31) between the connecting sleeve (33) and the connecting block (33). A positioning pin (341) that passes through the spring (2) is radially connected to one end of the connecting sleeve (34) near the bottom wall of the slot (31).

3. The swing arm mechanism of the wheel retainer according to claim 2, characterized in that, The outer wall of the connecting block (33) has two oppositely arranged and outwardly protruding connecting plates (331), and two guide rods (32) are fixed on the two connecting plates (331). The guide seat (4) includes a guide sleeve (41) arranged around the connecting shaft (111) and a front cover (42) fixed to one end of the guide sleeve (41). The outer wall of the front cover (42) has two oppositely arranged and outwardly protruding protrusions (421), and each protrusion (421) is embedded with a linear bearing (4211). The two guide rods (32) are slidably connected to the two linear bearings (4211) in a one-to-one correspondence.

4. The swing arm mechanism of the wheel retainer according to claim 3, characterized in that, The guide seat (4) also includes a guide flange (43) sleeved outside the connecting sleeve (34), and the guide flange (43) and the front cover (42) are fixedly connected.

5. The swing arm mechanism of the wheel retainer according to claim 4, characterized in that, A swing seat (112) is fixed on the rotating shaft (11). One end of the connecting shaft (111) is fixedly connected to the swing seat (112). A rear cover (1121) is fixedly connected to the swing seat (112) around the connecting shaft (111). The other end of the guide sleeve (41) is fixedly connected to the rear cover (1121).

6. The swing arm mechanism of the wheel retainer according to claim 5, characterized in that, The other end of the connecting shaft (111) has a protruding snap-fit ​​post (1111) on its end face. The outer diameter of the snap-fit ​​post (1111) is smaller than the outer diameter of the connecting shaft (111), and the spring (2) is snapped onto the snap-fit ​​post (1111).

7. The swing arm mechanism of the wheel retainer according to claim 3, characterized in that, Each of the guide rods (32) is connected to a limit cap (321) at one end passing through the linear bearing (4211).

8. The swing arm mechanism of the wheel retainer according to claim 7, characterized in that, Guide plates (13) are provided on both sides of the connecting seat (3) on the platform (1). The two ends of the rotating shaft (11) are rotatably connected to the two guide plates (13). Two rollers (121) with annular grooves (1211) along the circumference are rotatably connected to the guide arm (12). The two guide plates (13) are embedded in the two annular grooves (1211) one by one and abut against the rollers (121).

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