A glue head bolt for fixing a spare tire

Abstract

The utility model discloses a spare tire fixing is with glue head bolt, including the pressing plate and screw rod, the concave surface is equipped with recess on the pressing plate upper end, is equipped with the inlay groove on the concave surface, the inlay groove bottom is communicated and is equipped with screw rod groove, the screw rod is passed through screw rod groove and is connected with screw rod groove screw thread, the screw rod head part is clamped and is located screw rod groove upper end, the inlay groove is fixed and is equipped with the fixed plate, the fixed plate lower extreme fixedly equipped with the limiting post, the screw rod head part upper end is equipped with the limiting slot of adaptation with limiting post, the limiting post is clamped into the limiting slot, the pressing plate cover is equipped with the protection sleeve, the utility model discloses can realize component individual replacement, prevent false touch protection and high fixed reliability spare tire fixing bolt to satisfy modern automobile user to spare part use safety, economy and the demand of convenience.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and more specifically to a rubber-headed bolt for fixing a spare tire. Background Technology

[0002] In modern transportation systems, automobiles serve as convenient and efficient means of transportation. The spare tire, as a core component for handling sudden tire failures, directly impacts the efficiency of emergency response and driving safety due to its stability and ease of access. Most mainstream spare tire mounting methods rely on spare tire mounting bolts, whose core function is to securely fasten the spare tire to a designated location such as the bottom of the trunk, under the chassis, or inside the trunk, preventing displacement or abnormal noise caused by bumps and vibrations during vehicle operation.

[0003] A spare tire fixing bolt, disclosed in the prior art (CN205559491U), uses a fixed connection structure between the pressure plate and the screw to prevent parts loss. A vertical knurled structure is added at the connection between the pressure plate and the screw, utilizing the friction of the knurled surface to restrict axial rotation between them, reducing slippage during tightening and thus shortening the tightening time for spare tire installation and improving bolt tightening reliability. However, this invention still has the following problems: during long-term use of a car, the different components of the spare tire fixing bolt are significantly affected by wear and corrosion. Because the pressure plate and screw cannot be separated, the user can only... Replacing the entire bolt assembly not only increases maintenance costs but also wastes resources from undamaged parts. In addition, the gear-shaped structure of the pressure plate is directly exposed. The original design of this structure was to increase hand friction to facilitate users tightening or loosening the bolts. However, the exposed gear-shaped structure means that during vehicle travel, these items may accidentally hit or snag the gear-shaped structure of the pressure plate, or when organizing the trunk, the hand may accidentally rotate the bolt, causing it to be accidentally unscrewed and resulting in the spare tire being loosened. Therefore, this utility model proposes a rubber-headed bolt for securing the spare tire. Utility Model Content

[0004] The purpose of this utility model is to provide a spare tire fixing bolt with a rubber head that enables individual replacement of the component, prevents accidental contact, and provides high fixing reliability, thereby meeting the needs of modern car users for safety, economy, and convenience in the use of spare parts.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A spare tire fixing rubber-headed bolt includes a pressure plate and a screw. The upper end of the pressure plate has a concave surface, and an embedded groove is formed on the concave surface. A screw groove is provided at the bottom of the embedded groove. The screw passes through the screw groove and is threadedly connected to the screw groove. The head of the screw is engaged with the upper end of the screw groove. A fixing plate is fixedly installed in the embedded groove. A limiting post is fixedly installed at the lower end of the fixing plate. A limiting groove adapted to the limiting post is provided at the upper end of the screw head. The limiting post is engaged with the limiting groove. A protective sleeve is provided over the pressure plate.

[0006] Furthermore, the fixing plate is fixedly connected to the pressure plate by screws.

[0007] Furthermore, the number of screws is 2-4, and each screw is evenly spaced along the circumference of the fixing plate, with the screw axis parallel to the screw rod axis.

[0008] Furthermore, the edge of the pressure plate is provided with a gear-shaped surface, and the inner side of the protective sleeve fits and matches the gear-shaped surface.

[0009] Furthermore, the outer peripheral wall of the protective sleeve is provided with an annular groove, which is continuously arranged along the circumference of the protective sleeve.

[0010] Furthermore, the lower end of the pressure plate is provided with a concave structure, and a nut seat is fixedly installed in the concave structure. The axis of the nut seat is collinear with the axis of the screw.

[0011] Furthermore, the outer peripheral wall of the nut seat is fixedly connected to the inner side wall of the concave structure, and the connection between the two forms a reinforcing rib distributed along the circumference of the nut seat.

[0012] Furthermore, an anti-slip washer is provided between the screw head and the upper end face of the screw groove, and the anti-slip washer is sleeved on the outside of the screw head.

[0013] Furthermore, there are two limiting posts, which are located on both sides of the lower end of the fixing plate.

[0014] Beneficial effects: This utility model achieves modular disassembly of the pressure plate and screw through the detachable connection design of the embedded groove, fixing plate and screw, so that damaged parts can be replaced individually. In addition, the protective cover can effectively prevent the bolt from being unscrewed due to impact or snagging of items in the trunk while the vehicle is in motion, or due to accidental contact by the user's hands when organizing luggage, thus blocking the safety hazard of the spare tire loosening from the source. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure at the center of this utility model; Figure 3 This is a top view of the structure of this utility model; Figure 4 This is a schematic diagram of the structure of this utility model from a bottom view.

[0017] Reference numerals: 1. Pressure plate; 101. Concave structure; 102. Gear profile; 2. Concave surface; 201. Embedded groove; 202. Screw groove; 3. Protective sleeve; 301. Annular groove; 4. Fixing plate; 401. Limiting post; 5. Screw; 501. Limiting groove; 6. Screw; 7. Nut seat; 8. Anti-slip washer. Detailed Implementation

[0018] like Figures 1 to 2 As shown in this specific embodiment, a spare tire fixing rubber head bolt includes a pressure plate 1 and a screw 5, wherein the upper end of the pressure plate 1 is provided with a concave surface 2.

[0019] An embedded groove 201 is provided on the concave surface 2. A screw groove 202 is provided at the bottom of the embedded groove 201. The screw 5 passes through the screw groove 202 and is threadedly connected to the screw groove 202. The head of the screw 5 is locked at the upper end of the screw groove 202. An anti-slip washer 8 is provided between the head of the screw 5 and the upper end face of the screw groove 202. The screw 5 is connected to the pressure plate 1 through a triple fixing method of threaded connection, head locking and anti-slip washer 8. With the anti-rotation design of the lower end limiting post 401 of the fixing plate 4 and the head limiting groove 501 of the screw 5, the relative rotation between the pressure plate 1 and the screw 5 can be effectively prevented, avoiding loosening of the connection due to long-term vibration. The screw 5 is fitted with a fixing plate 4 in the inner groove 201. The fixing plate 4 is fixedly connected to the pressure plate 1 by screws 6. There are 2-4 screws 6, which are evenly spaced around the circumference of the fixing plate 4 and the axis of the screws 6 is parallel to the axis of the screw 5. The detachable connection design of the inner groove 201, the fixing plate 4, and the screws 6 realizes the modular disassembly of the pressure plate 1 and the screw 5. When the screw 5 is damaged due to thread stripping or deformation, or the pressure plate 1 fails due to impact or wear, it is not necessary to replace the entire bolt assembly. Only the screws 6 on the fixing plate 4 need to be removed and the fixing plate 4 needs to be removed to replace the damaged parts separately.

[0020] A limiting post 401 is fixedly provided at the lower end of the fixed plate 4, and a limiting groove 501 adapted to the limiting post 401 is provided at the upper end of the head of the screw 5. The limiting post 401 is inserted into the limiting groove 501. There are two limiting posts 401, which are located on both sides of the lower end of the fixed plate 4. The cooperation between the limiting post 401 and the limiting groove 501 ensures the stability of the connection between the two and avoids relative rotation during use.

[0021] like Figures 2 to 3As shown, a protective sleeve 3 covers the pressure plate 1. The edge of the pressure plate 1 has a gear-shaped surface 102. The inner side of the protective sleeve 3 fits and matches the gear-shaped surface 102. An annular groove 301 is formed on the outer peripheral wall of the protective sleeve 3. The annular groove 301 is continuously arranged along the circumference of the protective sleeve 3. The protective sleeve 3 serves two purposes. First, the protective sleeve 3 covering the pressure plate 1 can completely cover the operating parts of the edge of the pressure plate 1, which can effectively prevent items in the trunk from hitting or getting caught while the vehicle is in motion, or the bolts from being unscrewed due to accidental touch by the user when organizing luggage. This prevents the safety hazard of the spare tire loosening from the source. Second, the protective sleeve 3 is made of elastic rubber and its inner side fits the structure of the pressure plate 1. This not only reduces the entry of dust, mud and other impurities into the gear gap and avoids the bolts from getting stuck due to the accumulation of impurities, but also absorbs the impact of external forces through material buffering, further reducing the risk of accidental touch and ensuring the fixed safety of the spare tire during vehicle operation.

[0022] like Figure 2 and Figure 4 As shown, the lower end of the pressure plate 1 has a concave structure 101, and a nut seat 7 is fixedly installed inside the concave structure 101. The axis of the nut seat 7 is collinear with the axis of the screw 5. The nut seat 7 and the screw 5 are collinear, which can be precisely aligned and matched with the tire hub, limiting the radial displacement of the spare tire and preventing relative shaking between the spare tire and the pressure plate 1 when the vehicle is bumpy. The outer peripheral wall of the nut seat 7 is fixedly connected to the inner side wall of the concave structure 101. The connection between the two forms a reinforcing rib distributed along the circumference of the nut seat 7, which can distribute the weight of the spare tire and the impact force of bumps, reduce the structural deformation caused by local stress concentration, and further improve the overall fixing stability, fundamentally solving the problem of abnormal noise during driving caused by unstable fixing of traditional bolts.

[0023] Working Principle: This utility model achieves safe fixing, convenient maintenance, and emergency replacement of the spare tire through the synergistic action of various structures. The pressure plate 1 and the screw 5 are connected by threads, and the fixing plate 4 provides a detachable assembly structure. The screw 5 passes through the screw groove 202 of the pressure plate 1 and is initially fixed by threads. At the same time, the head of the screw 5 is locked at the upper end of the screw groove 202, forming a mechanical limit. The fixing plate 4 is fixed to the pressure plate 1 by screws 6, and the limiting post 401 at its lower end is embedded in the limiting groove 501 of the head of the screw 5, blocking the relative rotation between the screw 5 and the pressure plate 1, thus achieving a stable connection under the premise of detachability. When the pressure plate 1 or the screw 5 is damaged alone, only the screws 6 need to be removed and the fixing plate 4 needs to be taken off to release the limiting constraint between the screw 5 and the pressure plate 1. The two can be separated by reverse rotation, without the need to replace the entire bolt. Structurally, this breaks the limitation of traditional integrated bolts where one failure leads to total failure, reducing maintenance costs.

[0024] The protective sleeve 3 fits precisely against the edge of the pressure plate 1, forming a fully enclosed shield. This prevents items in the trunk from impacting or snagging on the gear surface 102, or from accidentally touching the bolts and causing them to loosen. The protective sleeve 3 is made of elastic rubber, which can cushion external impacts and further reduce the risk of bolt loosening due to accidental contact. The fitted design of the protective sleeve 3 and the pressure plate 1 prevents dust, dirt, and other impurities from entering the gap of the gear surface 102, avoiding bolt jamming caused by impurity accumulation. This ensures that the gear surface 102 can transmit hand torque normally during emergency replacement without affecting operational efficiency.

[0025] The nut seat 7 at the lower end of the pressure plate 1 is precisely matched with the spare tire hub bolt hole, and the axis of the nut seat 7 is collinear with the axis of the screw 5, ensuring that the spare tire can be positioned coaxially with the bolt during installation, avoiding radial offset. When the vehicle is bumpy, the nut seat 7 can provide rigid constraint on the spare tire, reducing the relative sway between the spare tire and the pressure plate 1. The circumferential reinforcing rib formed at the connection between the nut seat 7 and the concave structure 101 of the pressure plate 1 can evenly transfer the weight of the spare tire and the impact force of bumps to the entire pressure plate 1, avoiding structural deformation caused by local stress concentration. The threaded connection and head locking of the screw 5, together with the anti-rotation design of the limit post 401, can resist the loosening of the threads caused by vehicle vibration, ensuring the overall connection strength of the bolt.

[0026] Regarding the operating procedure, place the spare tire in the spare tire mounting position on the vehicle body, aligning the bolt holes of the spare tire hub with the threaded holes of the vehicle body mounting bracket. Holding the pressure plate 1 of the rubber-headed bolt, align the lower end of the screw 5 with the bolt hole of the spare tire hub, pass it through the hub, and align it with the threaded hole of the vehicle body mounting bracket. Hold the gear-shaped surface 102 on the edge of the pressure plate 1 (if a protective cover 3 is already in place, remove it first and re-put it on after fixing), and rotate the pressure plate 1 clockwise to engage the screw 5 with the threads of the vehicle body mounting bracket until the nut seat 7 is in contact with the spare tire hub. At this point, the spare tire is initially fixed. Use a wrench (or use your hand to apply force) to continue rotating the gear-shaped surface 102 clockwise until the screw 5 is fully tightened, ensuring that the spare tire does not wobble. Finally, slip the protective cover 3 onto the upper end of the pressure plate 1, ensuring that the inner side of the protective cover 3 is completely in contact with the gear-shaped surface 102, completing the spare tire fixing.

[0027] When replacing the pressure plate 1 or screw 5, remove the protective sleeve 3, unscrew the screw 6 on the fixing plate 4 with a tool, and store the screw 6 properly. Then, remove the fixing plate 4 from the inner groove 201 of the pressure plate 1 to expose the limiting groove 501 at the head of the screw 5. If the screw 5 is damaged, rotate the screw 5 clockwise to separate it from the screw groove 202 of the pressure plate 1 and remove the damaged screw 5. If the pressure plate 1 is damaged, rotate the screw 5 to disengage it from the pressure plate 1 and remove the damaged pressure plate 1. Assemble the new screw 5 or the new pressure plate 1 according to the original structure. The new screw 5 must pass through the screw groove 202 and be threaded, with the head locked in place. The new pressure plate 1 must ensure that the positions of the screw groove 202 and the inner groove 201 are consistent with the original structure. Place the fixing plate 4 back into the inner groove 201, so that the limiting post 401 is embedded in the limiting groove 501 of the head of the screw 5. Tighten the screw 6 to fix the fixing plate 4. Finally, put the protective cover 3 back on to complete the maintenance and replacement. The bolt can be used normally again.

[0028] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A spare tire fixing rubber-head bolt, comprising a pressure plate (1) and a screw (5), characterized in that, The upper end of the pressure plate (1) is provided with a concave surface (2), and an embedded groove (201) is provided on the concave surface (2). The bottom of the embedded groove (201) is connected to a screw groove (202). The screw (5) passes through the screw groove (202) and is threadedly connected to the screw groove (202). The head of the screw (5) is locked at the upper end of the screw groove (202). A fixing plate (4) is fixed in the embedded groove (201). A limiting post (401) is fixed at the lower end of the fixing plate (4). The upper end of the head of the screw (5) is provided with a limiting groove (501) that matches the limiting post (401). The limiting post (401) is locked into the limiting groove (501). The pressure plate (1) is covered with a protective sleeve (3).

2. The spare tire fixing rubber-head bolt according to claim 1, characterized in that, The fixing plate (4) is fixedly connected to the pressure plate (1) by screws (6).

3. The spare tire fixing rubber-head bolt according to claim 2, characterized in that, The number of screws (6) is 2-4, and each screw (6) is evenly spaced along the circumference of the fixing plate (4), and the axis of the screw (6) is parallel to the axis of the screw (5).

4. The spare tire fixing rubber-head bolt according to claim 1, characterized in that, The edge of the pressure plate (1) is provided with a gear-shaped surface (102), and the inner side of the protective sleeve (3) is fitted and matched with the gear-shaped surface (102).

5. A spare tire fixing rubber-head bolt according to claim 4, characterized in that, The outer peripheral wall of the protective sleeve (3) is provided with an annular groove (301), and the annular groove (301) is continuously arranged along the circumference of the protective sleeve (3).

6. The spare tire fixing rubber-head bolt according to claim 1, characterized in that, The lower end of the pressure plate (1) is provided with a concave structure (101), and a nut seat (7) is fixedly installed in the concave structure (101). The axis of the nut seat (7) is collinear with the axis of the screw (5).

7. A spare tire fixing rubber-head bolt according to claim 6, characterized in that, The outer peripheral wall of the nut seat (7) is fixedly connected to the inner side wall of the concave structure (101), and the connection between the two forms a reinforcing rib distributed along the circumference of the nut seat (7).

8. A spare tire fixing rubber-head bolt according to claim 1, characterized in that, An anti-slip washer (8) is provided between the head of the screw (5) and the upper end face of the screw groove (202), and the anti-slip washer (8) is sleeved on the outside of the head of the screw (5).

9. A spare tire fixing rubber-head bolt according to claim 8, characterized in that, There are two limiting posts (401), which are located on both sides of the lower end of the fixing plate (4).

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