Connecting structure between C column and doorsill beam and automobile
By installing connectors and reinforcing members between the C-pillar and the sill beam to form a reinforcing cavity, the problem of weak strength at the connection point is solved, improving the safety performance and structural strength of the vehicle in a side collision.
Patent Information
- Application Number
- CN202520572012.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-03-28
AI Technical Summary
In existing technology, there is a weak point at the connection between the C-pillar and the door sill beam, which causes the car to crumple severely during a side collision, affecting passenger safety and the ability to open the doors for self-rescue.
Connectors and reinforcing members are installed between the C-pillar and the sill beam to form a reinforcing cavity. The structural strength and energy absorption effect at the connection are improved by the inclined setting of connecting plate I and connecting plate II and the design of the reinforcing members.
It effectively improves the collision energy release effect and structural load-bearing capacity, enhances the body stiffness in the X direction, reduces door deformation, and reduces passenger injury risk and abnormal noise issues.
Smart Images
Figure CN223962179U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive technology, and in particular to a connection structure between a C-pillar and a door sill beam, and an automobile. Background Technology
[0002] The connection between the C-pillar and the door sill is located at the rear of the vehicle and serves as a primary force transmission channel in side collisions, playing a crucial role in protecting rear passengers. Currently, the C-pillar and door sill beam are generally directly connected without effective reinforcement, creating a weak point at this connection. This weakness leads to severe crumpling between the C-pillar and door sill beam during a side collision, causing extensive intrusion of the sheet metal during energy release. This results in severe leg and chest injuries for front and rear passengers. Furthermore, the massive sheet metal deformation prevents the doors from being opened for self-rescue, seriously impacting passenger safety.
[0003] Therefore, it is urgent to improve the connection structure between the C-pillar and the sill beam in the existing technology, so as to achieve a connection between the C-pillar and the sill beam without forming a weak area, thereby improving the structural strength of the connection between the C-pillar and the sill beam and enhancing the safety performance of the whole vehicle. Utility Model Content
[0004] In view of this, the purpose of this utility model is to provide a connection structure between the C-pillar and the sill beam, and a car, which, while achieving the connection between the C-pillar and the sill beam, does not form a weak area, thereby improving the structural strength of the connection between the C-pillar and the sill beam and enhancing the safety performance of the whole vehicle.
[0005] The connection structure between the C-pillar and the sill beam of this utility model includes a connector and a reinforcing member. The connector is used to connect the sill beam and the C-pillar, and the reinforcing member is fixed to the connector and forms a reinforcing cavity with the connector. By setting the connector to connect the sill beam and the C-pillar, and setting the reinforcing member to form a reinforcing cavity with the connector, the structural strength at the connection between the C-pillar and the sill beam can be improved.
[0006] Furthermore, the connector includes a connecting plate I and a connecting plate II fixed integrally with the connecting plate I. The connecting plate II is inclined relative to the plane where the connecting plate I is located. The reinforcing member is located on the outside of the connecting plate I and the connecting plate II and is located between the connecting plate I and the connecting plate II. The reinforcing member, the connecting plate I, and the connecting plate II together form a reinforcing cavity. The connecting plate II is inclined relative to the plane where the connecting plate I is located, thereby further improving the structural strength at the connection between the sill beam and the C-column. The reinforcing member, the connecting plate I, and the connecting plate II together form a reinforcing cavity, which is conducive to achieving the dual effects of collision energy absorption and load bearing.
[0007] Furthermore, the C-pillar includes an inner C-pillar panel and an outer C-pillar panel. The connecting plate I has a first overlapping portion I, a second overlapping portion I, and a third overlapping portion I. The inner side of the first overlapping portion I is fixedly connected to the outer side of the sill beam, the outer side of the first overlapping portion I is fixedly connected to the inner side of the outer C-pillar panel, the second overlapping portion I is fixedly connected to the connecting plate II, and the third overlapping portion I is fixedly connected to the inner C-pillar panel. The connecting plate I and the connecting plate II are disposed between the inner C-pillar panel and the outer C-pillar panel and are fixedly connected to the inner C-pillar panel and the outer C-pillar panel, thereby improving the structural strength of the C-pillar base.
[0008] Furthermore, the connecting plate II has a first overlapping portion II, a second overlapping portion II and a third overlapping portion II, the first overlapping portion II is fixedly connected to the second overlapping portion II, the second overlapping portion II is fixedly connected to the inner panel of the C-pillar, and the third overlapping portion II is fixedly connected to the outer panel of the C-pillar.
[0009] Furthermore, the connecting plate II includes an inclined surface, which is inclined relative to the connecting plate I and extends forward on the side closer to the connecting plate I to form a vertical surface II. The other side of the inclined surface extends backward to form the third overlapping part II. The vertical surface II is provided with a connecting hole II and a positioning hole II. The inclined surface is provided with a process hole I and a rib II. The rib II on the inclined surface can improve the structural strength of the connecting plate II.
[0010] Furthermore, the first overlapping part II has a serrated structure; the first overlapping part II has a serrated structure, which can reduce the weight of the connecting plate II, and at the same time reduce the probability of cracking and wrinkling of the connecting plate II during stamping.
[0011] The inclined surface forms a U-shaped groove, and the rib II is disposed in the U-shaped groove; by forming a U-shaped groove on the inclined surface, the support rigidity of the connecting plate II in the Y direction of the whole vehicle can be improved.
[0012] Furthermore, the reinforcing member includes a connecting surface I, the upper and front sides of which are bent inward to form connecting surfaces II and III, respectively. Connecting surfaces II and III are respectively formed with a first flange and a second flange, and the rear side of the connecting surface I forms a third flange. The second flange and the third flange are respectively connected to the outer sides of connecting plate I and connecting plate II. The reinforcing member is located between the cavity formed by the inner plate and the outer plate of the C-pillar, thereby improving the structural strength at the connection between the C-pillar and the sill beam, and also improving the reinforcing member of the C-pillar, further enhancing the structural strength of the C-pillar.
[0013] Furthermore, process holes II are respectively provided on connecting surfaces I, II and III, and positioning holes III are also provided on connecting surface I; by providing positioning holes III, it is beneficial to position and install connecting plate I.
[0014] Furthermore, the connecting plate I includes a vertical surface I, the third overlapping portion I is formed on the upper part of the vertical surface I, the vertical surface I is bent outward to form a bent portion I, the bent portion I is bent downward to form the first overlapping portion I, the vertical surface I is provided with positioning holes I and multiple connecting holes I, and a rib I is provided near the connection between the vertical surface I and the bent portion I; the rib I can improve the structural strength of the connecting plate I.
[0015] The automobile of this invention includes the connection structure between the C-pillar and the door sill beam.
[0016] The beneficial effects of this utility model are as follows: The connection structure between the C-pillar and the sill beam of this utility model and the automobile are provided with a connector for connecting the sill beam and the C-pillar of the automobile, and a reinforcing member is provided to form a reinforcing cavity with the connector. This can achieve the dual effect of energy absorption and load bearing in the key load-bearing area where the C-pillar and the sill meet. It can effectively improve the effect of collision energy release and structural load bearing, enhance the stiffness of the vehicle body structure in the X direction of the whole vehicle, improve the bending stiffness and bending mode of the vehicle body, and at the same time effectively reduce the deformation of the door frame during vehicle driving, reduce the risk of relative misalignment between the door and the vehicle body during vehicle driving, and avoid the occurrence of abnormal noise problems. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a front view of connecting plate I;
[0020] Figure 3 This is the rear view of connecting plate I;
[0021] Figure 4 This is a front view of connecting plate II;
[0022] Figure 5 This is the rear view of connecting plate II;
[0023] Figure 6 This is a front view of the reinforcement component;
[0024] Figure 7 Rear view of the reinforcement component;
[0025] Figure 8 A structural diagram showing the fit between the connector and the reinforcement.
[0026] The above figures include the following reference numerals:
[0027] 1. C-pillar inner panel; 2. Reinforcing member; 201. Second flange; 202. First flange; 203. Third flange; 204. Connecting surface I; 205. Connecting surface III; 206. Connecting surface II; 207. Process hole II; 208. Positioning hole III; 3. Connecting plate I; 301. First overlap I; 302. Second overlap I; 303. Third overlap I; 304. Raised rib I; 305. Vertical surface I; 306. Bending part I; 307. Positioning hole I; 308. Connecting hole I; 4. Connecting plate II; 401. First overlap II; 402. Raised rib II; 403. Second overlap II; 404. Third overlap II; 405. Vertical surface II; 406. Inclined surface; 407. Positioning hole II; 408. Connecting hole II; 409. Process hole I. Detailed Implementation
[0028] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 2 This is a front view of connecting plate I. Figure 3 This is the rear view of connecting plate I. Figure 4 This is a front view of connecting plate II. Figure 5 This is the rear view of connecting plate II. Figure 6 This is a front view of the reinforcement component. Figure 7 This is a rear view of the reinforcement. Figure 8 A structural diagram showing the fit between the connector and the reinforcement, as shown below. Figure 1-8 As shown: The connection structure between the C-pillar and the sill beam in this embodiment includes a connector and a reinforcing member 2. The connector is used to connect the sill beam and the C-pillar. The reinforcing member 2 is fixed to the connector and forms a reinforcing cavity with the connector. The connector can be a connecting plate or other structure. The reinforcing member 2 can be fixed by welding or other methods. By connecting the sill beam and the C-pillar with the connector, the structural strength of the connection can be improved compared to the direct connection of the sill beam and the C-pillar in the prior art. At the same time, the reinforcing member 2 and the connector form a reinforcing cavity at the corner connection of the sill beam and the C-pillar, which can further improve the structural strength of the connection. When the connection between the sill beam and the C-pillar is subjected to external impact, some energy can be consumed, thereby reducing the deformation at the connection between the sill beam and the C-pillar. This effectively improves the collision energy absorption effect and structural load-bearing capacity, which is conducive to improving the safety performance of the whole vehicle and reducing the injury to passengers when collision deformation occurs.
[0029] In existing technologies, the C-pillar and sill beam are generally directly connected without effective reinforcement, resulting in a weak point at the connection. This weak point leads to severe crumpling between the C-pillar and sill beam during a side collision, causing extensive intrusion of the collapsed sheet metal during energy release, resulting in serious leg and chest injuries to front or rear passengers. Furthermore, the massive sheet metal deformation prevents the doors from being opened for self-rescue, severely impacting passenger safety. This invention addresses this by providing a connection structure between the C-pillar and sill beam, incorporating a connector to link the sill beam and C-pillar, and a reinforcing member 2 forming a reinforced cavity with the connector. This achieves a dual effect of energy absorption and load-bearing in the critical load-bearing area where the C-pillar and sill meet, effectively improving collision energy release and structural load-bearing capacity. It also enhances the vehicle's structural stiffness in the X-direction, improves bending stiffness and bending modes, and effectively reduces door frame deformation during vehicle operation, minimizing the risk of relative misalignment between the door and body and preventing abnormal noises.
[0030] In this embodiment, the connecting member includes a connecting plate I3 and a connecting plate II4 fixed integrally with the connecting plate I3. The connecting plate II4 is inclined relative to the plane where the connecting plate I3 is located. The reinforcing member 2 is disposed on the outside of the connecting plate I3 and the connecting plate II4 and is located between the connecting plate I3 and the connecting plate II4. The reinforcing member 2, together with the connecting plate I3 and the connecting plate II4, forms a reinforcing cavity. The connecting plate II4 is inclined outward and backward relative to the plane where the connecting plate I3 is located (inward and outward are relative to the inward and outward directions of the car, and forward and backward are relative to the forward and backward directions of the car). The connecting plate I3 and the connecting plate II4 are separate structures and can be fixed integrally by welding or other fixing methods. At the same time, the reinforcing member 2 is connected to the outside of the connecting plate I3 and the connecting plate II4 respectively and forms a reinforcing cavity, thereby achieving the dual effect of collision energy absorption and load bearing. Compared with the prior art, where the C-pillar and the sill beam are directly connected by a single connecting member, in this structure, by setting the connecting plate I3 and the connecting plate II4 to be connected to the C-pillar and the sill beam respectively, multiple force transmission paths can be formed, improving the structural strength of the connection.
[0031] In this embodiment, the C-pillar includes an inner C-pillar panel 1 and an outer C-pillar panel. The connecting plate I3 has a first overlapping portion I301, a second overlapping portion I302, and a third overlapping portion I303. The inner side of the first overlapping portion I301 is fixedly connected to the outer side of the sill beam, and the outer side of the first overlapping portion I301 is fixedly connected to the inner side of the outer C-pillar panel. The second overlapping portion I302 is fixedly connected to the connecting plate II4, and the third overlapping portion I303 is fixedly connected to the inner C-pillar panel 1. The outer C-pillar panel is not shown in the figure. The outer C-pillar panel is fixedly connected to the inner C-pillar panel 1. The inner side of the first overlapping portion I301 (relative to the inside and outside direction of the car) is welded to the outer side of the sill beam, or it can be connected by bolts. The outer side of the second overlapping portion I302 is fixedly connected to the inner side of the outer C-pillar panel, and the third overlapping portion I303 is fixedly connected to the inner C-pillar panel 1 and also fixedly connected to the outer C-pillar panel. The connection method is welding, which can also improve the structural strength of the C-pillar.
[0032] In this embodiment, the connecting plate II4 has a first overlapping portion II401, a second overlapping portion II403, and a third overlapping portion II404. The first overlapping portion II401 is fixedly connected to the second overlapping portion I302, the second overlapping portion II403 is fixedly connected to the inner panel 1 of the C-pillar, and the third overlapping portion II404 is fixedly connected to the outer panel of the C-pillar. The first overlapping portion II401 and the second overlapping portion I302 can be connected by welding or screwing, and the third overlapping portion II404 is fixedly connected to the outer panel of the C-pillar. Thus, the connecting plate II4 is disposed between the inner panel 1 and the outer panel of the C-pillar, which can improve the structural strength of the C-pillar. At the same time, it can make the reinforcing member 2 located between the inner panel 1, the outer panel of the C-pillar, and the third overlapping portion II404, which can play a certain role in strengthening the structural strength of the C-pillar.
[0033] In this embodiment, the connecting plate II4 includes an inclined surface 406. The inclined surface 406 is inclined relative to the connecting plate I3 and extends forward on the side closest to the connecting plate I3 to form a vertical surface II405. The other side of the inclined surface 406 extends backward to form the third overlapping portion II404. The vertical surface II405 is provided with a connecting hole II408 and a positioning hole II407. The inclined surface 406 is provided with a process hole I409 and a rib II402. The positioning hole II407 on the vertical surface II405 facilitates the connection of the connecting plate II404. For the assembly and installation of plate 4, the connecting hole II408 is a threaded hole used for threaded connection with connecting plate I3 (with bolt fastening). The vertical surface II405 is set relative to the vertical direction of the car. The inclined surface 406 is provided with a rib II402, which can improve the structural strength of connecting plate II4. By setting positioning hole II407 and connecting hole II408 on connecting plate II4, the structural strength of connecting plate II4 can meet the usage requirements, and the structure can be lightweight. At the same time, the process hole I409 is set on connecting plate II4, which is beneficial to the processing and assembly of connecting plate II4.
[0034] In this embodiment, the first overlapping part II 401 has a serrated structure; the first overlapping part II 401 has a serrated structure, which can reduce the weight of the connecting plate II 4 and reduce the probability of cracking and wrinkling of the connecting plate II 4 during stamping.
[0035] The inclined surface 406 forms a U-shaped groove, and the rib II 402 is disposed in the U-shaped groove; the inclined surface 406 forms a U-shaped opening groove, and the rib II 402 is disposed in the U-shaped groove, so that the inclined surface 406 is located on different planes, thereby improving the support stiffness of the connecting plate II 4 in the Y direction (left and right direction of the car).
[0036] In this embodiment, the reinforcing member 2 includes a connecting surface I 204. The upper and front sides of the connecting surface I 204 are bent inward to form connecting surfaces II 206 and III 205, respectively. Connecting surfaces II 206 and III 205 are respectively provided with a first flange 202 and a second flange 201. The rear side of the connecting surface I 204 forms a third flange 203. The second flange 201 and the third flange 203 are respectively connected to the outer sides of connecting plates I 3 and II 4. The first flange 202 spans between connecting plates I 3 and II 4, the second flange 201 is welded to connecting plate I 3, and the third flange 203 is welded to connecting plate II 4. Figure 4 As shown in the center view, "up and down" refers to the vertical direction relative to the car, "front and back" refers to the front and back direction relative to the car, and "inside and outside" refers to the inside and outside direction relative to the car. The upper and front sides of the connecting surface I 204 are bent inward to form connecting surface II 206 and connecting surface III 205. Thus, connecting surface I 204, connecting surface II 206 and connecting surface III 205 form a corner of a cube-like structure. At the same time, by forming the third flange 203, the reinforcing member 2, connecting plate I 3 and connecting plate II 4 form a box-shaped structure, further improving the structural strength of the connection between the C-pillar and the sill beam.
[0037] In this embodiment, process holes II207 are respectively provided on the connecting surface I204, connecting surface II206 and connecting surface III205, and positioning holes III208 are also provided on the connecting surface I204. By providing multiple process holes II207 on the reinforcing member 2, it is beneficial to process and assemble the reinforcing member 2. The positioning holes III208 on the connecting surface I204 facilitate the positioning and installation of the reinforcing member 2.
[0038] In this embodiment, the connecting plate I3 includes a vertical surface I305, a third overlapping portion I303 formed on the upper part of the vertical surface I305, the vertical surface I305 extending outward to form a bent portion I306, the bent portion I306 extending downward to form a first overlapping portion I301, the vertical surface I305 is provided with a positioning hole I307 and a plurality of connecting holes I308, and a rib I304 is provided near the connection between the vertical surface I305 and the bent portion I306; the third overlapping portion I303 is connected to the lower part of the inner panel 1 of the C-pillar, the vertical surface I305 is arranged along the vertical direction of the car, and the lower part of the vertical surface I305 is bent outward. The extension forms a bent portion I306, which bends downward to form a first overlapping portion I301, thus conforming to the shape of the outer side of the upper surface of the sill beam. The first overlapping portion I301 is provided with multiple SPR holes (riveting holes) for fixed connection with the sill beam, thereby improving the stability of the connection. At the same time, a positioning hole I307 is provided on the vertical surface I305 to facilitate the assembly of the connecting plate I3. A raised rib I304 is provided near the connection between the vertical surface I305 and the bent portion I306 (which may be the connection point or near the connection point) to improve the structural strength of the connecting plate I3. The connecting hole I308 is a threaded hole for connection with the vehicle body structure.
[0039] The automobile of this embodiment includes the connection structure between the C-pillar and the door sill beam.
[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A connection structure between a C-pillar and a door sill beam, characterized in that: It includes a connector and a reinforcing member. The connector is used to connect the sill beam and the C-post. The reinforcing member is fixed to the connector and forms a reinforcing cavity between the connector and the connector.
2. The connection structure between the C-pillar and the sill beam according to claim 1, characterized in that: The connector includes a connecting plate I and a connecting plate II fixed integrally with the connecting plate I. The connecting plate II is inclined relative to the plane where the connecting plate I is located. The reinforcing member is disposed on the outside of the connecting plate I and the connecting plate II and is located between the connecting plate I and the connecting plate II. The reinforcing member, the connecting plate I and the connecting plate II together form a reinforcing cavity.
3. The connection structure between the C-pillar and the sill beam according to claim 2, characterized in that: The C-pillar includes an inner C-pillar panel and an outer C-pillar panel. The connecting plate I has a first overlapping part I, a second overlapping part I, and a third overlapping part I. The inner side of the first overlapping part I is fixedly connected to the outer side of the sill beam, the outer side of the first overlapping part I is fixedly connected to the inner side of the outer C-pillar panel, the second overlapping part I is fixedly connected to the connecting plate II, and the third overlapping part I is fixedly connected to the inner C-pillar panel.
4. The connection structure between the C-pillar and the sill beam according to claim 3, characterized in that: The connecting plate II has a first overlapping part II, a second overlapping part II and a third overlapping part II. The first overlapping part II is fixedly connected to the second overlapping part I, the second overlapping part II is fixedly connected to the inner panel of the C-pillar, and the third overlapping part II is fixedly connected to the outer panel of the C-pillar.
5. The connection structure between the C-pillar and the sill beam according to claim 4, characterized in that: The connecting plate II includes an inclined surface. The inclined surface is inclined relative to the connecting plate I and extends forward on the side close to the connecting plate I to form a vertical surface II. The other side of the inclined surface extends backward to form the third overlapping part II. The vertical surface II is provided with a connecting hole II and a positioning hole II. The inclined surface is provided with a process hole I and a rib II.
6. The connection structure between the C-pillar and the sill beam according to claim 5, characterized in that: The first overlapping part II has a serrated structure; The inclined surface forms a U-shaped groove, and the rib II is disposed in the U-shaped groove.
7. The connection structure between the C-pillar and the sill beam according to claim 2, characterized in that: The reinforcing member includes a connecting surface I, the upper side and the front side of the connecting surface I are bent inward to form a connecting surface II and a connecting surface III, the connecting surface II and the connecting surface III are respectively formed with a first flange and a second flange, the rear side of the connecting surface I forms a third flange, and the second flange and the third flange are respectively connected to the outer side of the connecting plate I and the connecting plate II.
8. The connection structure between the C-pillar and the sill beam according to claim 7, characterized in that: The connecting surfaces I, II and III are respectively provided with process holes II, and the connecting surface I is also provided with positioning holes III.
9. The connection structure between the C-pillar and the sill beam according to claim 3, characterized in that: The connecting plate I includes a vertical surface I, the third overlapping part I is formed on the upper part of the vertical surface I, the vertical surface I is bent outward to form a bent part I, the bent part I is bent downward to form the first overlapping part I, the vertical surface I is provided with a positioning hole I and a plurality of connecting holes I, and a protruding rib I is provided near the connection between the vertical surface I and the bent part I.
10. A car, characterized in that: Includes the connection structure between the C-pillar and the sill beam as described in any one of claims 1-9.