阅读说明：本技术 燃油箱油管管夹减震结构 (Fuel tank oil pipe clamp shock-absorbing structure ) 是由 袁杰 陈燕林 渠胜华 于 2020-05-19 设计创作，主要内容包括：本发明公开了一种燃油箱油管管夹减震结构,包括管夹本体和管夹片,其特征在于：所述管夹片的外壁沿周向均匀连接有多个弹簧,所述管夹本体的内壁沿周向均匀设有多个导向孔,所述弹簧的一端位于导向孔中,所述管夹本体上沿管夹片的周向均匀设有多个应力释放孔,所述应力释放孔与所述导向孔间隔排布且关于管夹片的圆心对称。该减震结构在保证管夹本体的减震性能基础上,大大减小了管夹体与弹簧连接处的应力集中,避免了管夹本体发生疲劳损伤。(The invention discloses a fuel tank oil pipe clamp shock absorption structure, which comprises a pipe clamp body and a pipe clamping piece, and is characterized in that: the pipe clamp comprises a pipe clamp body and is characterized in that a plurality of springs are evenly connected to the outer wall of the pipe clamp piece along the circumferential direction, a plurality of guide holes are evenly formed in the inner wall of the pipe clamp body along the circumferential direction, one ends of the springs are located in the guide holes, a plurality of stress release holes are evenly formed in the pipe clamp body along the circumferential direction of the pipe clamp piece, and the stress release holes are arranged at intervals in the guide holes and are symmetrical about the circle center of the pipe clamp piece. The damping structure greatly reduces stress concentration at the joint of the pipe clamp body and the spring on the basis of ensuring the damping performance of the pipe clamp body, and avoids fatigue damage of the pipe clamp body.)

1. The utility model provides a fuel tank oil pipe clamp shock-absorbing structure, includes pipe clamp body (1) and pipe clamping piece (3), its characterized in that: the outer wall of pipe clamping piece (3) evenly is connected with a plurality of springs (4) along circumference, the inner wall of pipe clamp body (1) evenly is equipped with a plurality of guiding holes (5) along circumference, the one end of spring (4) is arranged in guiding hole (5), be equipped with a plurality of stress release holes (6) around pipe clamping piece (3) on pipe clamp body (1).

2. The fuel tank hose clamp shock-absorbing structure according to claim 1, wherein: the stress release holes (6) are uniformly distributed along the circumferential direction of the pipe clamping piece (3), and the stress release holes (6) and the guide holes (5) are arranged at intervals and are symmetrical about the circle center of the pipe clamping piece (3).

3. A fuel tank hose clamp shock-absorbing structure according to claim 2, wherein: the stress release hole (6) is formed along the axial direction of the pipe clamping piece (3), and one side, close to the pipe clamping piece, of the stress release hole (6) is an arc parallel to the outer wall surface of the pipe clamping piece (3).

4. A fuel tank hose clamp shock-absorbing structure according to claim 3, wherein: the pipe clamp is characterized in that a plurality of guide shaft sleeves (2) are evenly and fixedly connected to the outer wall of the pipe clamp (3) along the circumferential direction, the guide shaft sleeves (2) are inserted into the guide holes, and the other ends of the springs (4) are located in the guide shaft sleeves (2).

5. The fuel tank hose clamp shock-absorbing structure according to claim 1, wherein: the pipe clamp body (1) comprises an upper pipe clamp body (11) and a lower pipe clamp body (12), wherein the upper pipe clamp body (11) is hinged to one end of the lower pipe clamp body (12), and the other end of the upper pipe clamp body is open.

6. The fuel tank hose clamp shock-absorbing structure according to claim 5, wherein: the lower pipe clamp body (12) comprises a pipe clamp body connecting part (13) protruding out of the upper pipe clamp body (11) close to the hinged end, and a pipe clamp body fixing hole (131) is formed in the pipe clamp body connecting part (13).

7. The fuel tank hose clamp shock-absorbing structure according to claim 6, wherein: an upper clamping part (111) is arranged on the upper tube clamp body (11), and the upper clamping part comprises an upper clamping hook (112), an upper clamping block (114) and an upper clamping groove (113) positioned between the upper clamping hook and the upper clamping block; be equipped with on lower tube clamp (12) with lower joint portion (121) of last joint portion (111) joint, lower joint portion (121) include with lower draw-in groove (123) of last fixture block (114) block to and with lower pothook (122) of last pothook (112) joint.

8. The fuel tank hose clamp shock-absorbing structure according to claim 7, wherein: the pipe clamp body (1) is further provided with a plurality of lightening holes (7).

Technical Field

The invention relates to the technical field of automobile parts, in particular to a damping structure for an oil pipe clamp of a fuel tank.

Background

The fuel system is a fuel supply system in the whole vehicle running process, and the continuous fuel supply can ensure the normal running of the vehicle, wherein the fuel pump is one of the core components of the fuel supply. During the running of the automobile, the fuel pump supplies fuel in the fuel tank to the engine through the periodic pumping action. In the process, the fuel oil pipeline generates pulse type vibration due to the periodic pumping action of the fuel oil pump, meanwhile, oil supply pipes of a plurality of complete machine plants are nylon pipes which are directly connected with an engine oil rail or a high-pressure oil pump, and the nylon pipes are relatively high in rigidity, so that the vibration of the engine can be transmitted into the vehicle through the nylon pipes. The automobile oil supply pipe is basically fixed below a bottom plate of the whole automobile, and both generated pulse vibration and vibration transmitted to the oil pipe by an engine can be transmitted to fixing elements such as pipe clamps and the like through pipelines and finally transmitted into the automobile. The NVH problems such as vibration or noise are generated, the driving feeling in the automobile is seriously influenced, the traditional damping pipe clamp is of a rubber damping structure, the hardness of the traditional damping pipe clamp cannot be lower due to the fact that the traditional damping pipe clamp is made of materials, and the damping effect is limited.

Chinese patent CN108662294A discloses a duplex double-hole shockproof pipe clamp, which is a technology that more aims to improve the shock absorption performance of the pipe clamp, but does not pay attention to the problem that the pipe clamp generates stress concentration under high-frequency and large-amplitude shock impact, and further generates fatigue damage.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a fuel tank oil pipe clamp damping structure which effectively reduces stress concentration of a pipe clamp and avoids fatigue damage of the pipe clamp.

In order to achieve the purpose, the invention provides a damping structure for an oil pipe clamp of a fuel tank, which comprises a pipe clamp body and a pipe clamping piece, and is characterized in that: the outer wall of pipe clamping piece evenly is connected with a plurality of springs along circumference, the inner wall of pipe clamp body evenly is equipped with a plurality of guiding holes along circumference, the one end of spring is arranged in the guiding hole, be equipped with a plurality of stress release holes along pipe clamping piece around on the pipe clamp body.

Further, the stress release holes 6 are uniformly distributed along the circumferential direction of the pipe clamping piece 3, and the stress release holes 6 and the guide holes 5 are arranged at intervals and are symmetrical about the circle center of the pipe clamping piece 3.

Furthermore, the stress release hole 6 is formed along the axial direction of the pipe clamp piece 3, and one side, close to the pipe clamp piece, of the stress release hole 6 is an arc parallel to the outer wall surface of the pipe clamp piece 3.

Further, a plurality of guide shaft sleeves 2 are uniformly and fixedly connected to the outer wall of the pipe clamping piece 3 along the circumferential direction, the guide shaft sleeves 2 are inserted into the guide holes, and the other ends of the springs 4 are located in the guide shaft sleeves 2.

Further, the pipe clamp body 1 comprises an upper pipe clamp body 11 and a lower pipe clamp body 12, wherein the upper pipe clamp body 11 is hinged to one end of the lower pipe clamp body 12, and the other end of the upper pipe clamp body is open.

Further, the lower pipe clamp body 12 includes a pipe clamp body connecting portion 13 protruding from the upper pipe clamp body 11 near the hinged end, and the pipe clamp body connecting portion 13 is provided with a pipe clamp body fixing hole 131.

Further, an upper clamping portion 111 is arranged on the upper tube clamp body 11, and the upper clamping portion includes an upper clamping hook 112, an upper clamping block 114 and an upper clamping groove 113 located therebetween; the lower tube clamp 12 is provided with a lower clamping portion 121 clamped with the upper clamping portion 111, and the lower clamping portion 121 includes a lower clamping groove 123 clamped with the upper clamping block 114 and a lower clamping hook 122 clamped with the upper clamping hook 112.

Furthermore, a plurality of lightening holes are further formed in the pipe clamp body.

The invention has the beneficial effects that: effectively reduce the pipe clamp stress concentration, avoid the pipe clamp to take place fatigue damage. According to the invention, the pipe clamp body is uniformly provided with the plurality of stress release holes along the circumferential direction of the pipe clamp piece, and the stress release holes and the guide holes are arranged at intervals and are symmetrical about the circle center of the pipe clamp piece. The damping structure greatly reduces stress concentration at the joint of the pipe clamp body and the spring on the basis of ensuring the damping performance of the pipe clamp body, and avoids fatigue damage of the pipe clamp body.

Drawings

Fig. 1 is a front view of a pipe clamp shock-absorbing structure.

Figure 2 is a front cross-sectional view of the pipe clamp shock absorbing structure.

Fig. 3 is a partial view of fig. 2 at B.

The components in the figures are numbered as follows: 1-pipe clamp body, 11-upper pipe clamp body, 111-upper clamping part, 112-upper clamping hook, 113-upper clamping groove, 114-upper clamping block, 12-lower pipe clamp body, 121-lower clamping part, 122-lower clamping hook, 123-lower clamping groove, 13-pipe clamp body connecting part, 131-pipe clamp body fixing hole, 2-guide shaft sleeve, 3-pipe clamping piece, 4-spring, 5-guide hole, 6-stress release hole and 7-lightening hole.

Detailed Description

The invention will be described in more detail below with reference to the accompanying drawings, which are included to provide a more clear understanding of the invention, but are not intended to limit the invention.

As shown in figures 1-3, a fuel tank oil pipe clamp shock-absorbing structure, including pipe clamp body 1 and pipe clamp piece 3, the outer wall of pipe clamp piece 3 evenly is connected with a plurality of springs 4 along circumference, the inner wall of pipe clamp body 1 evenly is equipped with a plurality of guiding holes 5 along circumference, the one end of spring 4 is located guiding hole 5, evenly be equipped with a plurality of stress release holes 6 along the circumference of pipe clamp piece 3 on the pipe clamp body 1, stress release hole 6 is arranged and is about the centre of a circle symmetry of pipe clamp piece 3 with the 5 intervals in guiding hole. Therefore, when the pipe clamp piece is vibrated, the vibration is attenuated through the spring, the vibration is prevented from being transmitted to the pipe clamp body, and the vibration absorption performance of the pipe clamp body is ensured; in addition, stress concentration at the joint of the pipe clamp body and the spring is greatly reduced through the stress release holes which are uniformly formed, and fatigue damage of the pipe clamp body is avoided.

As a preferred embodiment, the stress release hole 6 is formed along the axial direction of the pipe clamping piece 3, the cross section of the stress release hole 6 is an isosceles triangle with a circular arc-shaped bottom side, and three corners of the isosceles triangle are chamfered. The bottom edge of the stress release hole 6 is parallel to the arc surface of the outer wall of the pipe clamping piece 3, and the angular bisector of the vertex angle of the stress release hole 6 passes through the circle center of the pipe clamping piece 3. Therefore, the stress release holes are symmetrical about the circle center of the pipe clamp piece, the impact force of the spring on the pipe clamp body is good in isotropy, the bottom edges of the stress release holes are parallel to the arc surface of the outer wall of the pipe clamp piece, vibration of the pipe clamp piece is transmitted to the pipe clamp body and then is more uniform in the circumferential direction, and the phenomenon of stress concentration is further avoided.

Among the above-mentioned technical scheme, along the even fixedly connected with a plurality of guide shaft sleeve 2 of circumference on the outer wall of pipe clamp piece 3, guide shaft sleeve 2 inserts in guiding hole 5, and the other end of spring 4 is located guide shaft sleeve 2. Therefore, the guide shaft sleeve and the guide hole limit the compression and extension directions of the spring, the spring is guaranteed to be compressed and extended only in the radial direction of the pipe clamping piece, and the spring can buffer the vibration transmitted to the pipe clamp body from the pipe clamping piece to the maximum extent.

Among the above-mentioned technical scheme, pipe clamp body 1 includes upper tube clamp 11 and lower tube clamp 12, and upper tube clamp 11 is articulated with lower tube clamp 12 one end, and the other end opening. The lower pipe clamp body 12 comprises a pipe clamp body connecting part 13 protruding out of the upper pipe clamp body 11 near the hinged end, and a pipe clamp body fixing hole 131 is formed in the pipe clamp body connecting part 13. Thus, the pipe clamp body is fixed with the vehicle body through the pipe clamp body fixing hole.

In the above technical solution, the upper tube clamp 11 is provided with an upper clamping portion 111, which includes an upper clamping hook 112, an upper clamping block 114 and an upper clamping groove 113 located therebetween; the lower tube holder 12 is provided with a lower clamping portion 121 clamped with the upper clamping portion 111, and the lower clamping portion 121 includes a lower clamping groove 123 clamped with the upper clamping block 114 and a lower clamping hook 122 clamped with the upper clamping hook 112. Therefore, when the upper pipe clamp body is clamped with the lower pipe clamp body, the upper clamp block is clamped with the lower clamp groove to realize positioning, and then the upper clamp hook is clamped with the lower clamp hook to realize fixed connection.

In the above technical scheme, the pipe clamp body 1 is further provided with a plurality of lightening holes 7. Therefore, the weight of the whole vehicle can be reduced on the basis of ensuring the structural strength of the pipe clamp body, and the oil consumption is saved.