Below by embodiment, in conjunction with accompanying drawing, the technical scheme of the present invention is as preferred specific description:
 It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer "respectively refer to towards or away from. If it is to describe the structure of the shell cavity, it is to describe the inside and outside of the shell, the direction of the geometric center of the invention or its specific components. The connection method specified in this embodiment is generally Welded connections, bolt or screw connections, snap-fit connections, snap-fit connections, etc. of the prior art are all prior technologies well known to those skilled in the art.
 The present invention is achieved through the following technical proposals: a closed torsion beam with variable cross-section hydraulic pressure includes a main beam (1) and a side beam (2), and side beams (2) are vertically arranged at the head end and tail end of the main beam (1) ), connected into an H-shaped overall structure, the above is the same as the production method of the torsion beam in the prior art, and has no other technical features. The structure and method of production are well known to those skilled in the art and will not be repeated. Used for I-shape torsion beams, that is figure 1 structure shown;
 Among them: the I-shaped torsion beam under the prior art is generally provided with side beams on the left and right of the main beam (1) and the side beam (2), and there will be a lower side corner (3) at the junction of the side beam and the beam , this side corner is generally provided with a spring plate according to the existing technology. Once the spring plate is loaded, the connecting rod bracket will be installed here. The multi-link assembly of the car will transmit most of the stress here. The existing The torsion beam connection method of the technology is too simple, most of which are carried out by welding, and the life, firmness, and failure rate will be relatively high; so we separately designed a reinforced module (4) set at this position; The reinforcement module (4) includes a side spring plate (5), a beam connection plate (6), and a spring plate connection plate (7). The side spring plate (5) is integrally shaped and includes a bottom plate pad (8 ) and the inner connection side panel (9) and the outer connection side panel (10), the specific structure is as follows figure 2 at the lower center,
 And between the inner connection side piece (9) and the outer connection side piece (10), there is also a bottom connection piece (11). Here, the bottom connection piece (11) is one of the inventive points of the present invention, and its use can match At the lower side corners (3) the side members and the main beam connecting structure insert themselves below them,
 The bottom connecting piece (11) is extended to the bottom of the side beam and fitted on the outer wall of the bottom of the side beam, and the bottom is welded, so as to match the beam connecting plate (6) on the top and clamp up and down to enhance the overall connection structure and stability;
 Continue to tilt up the upper left side of the spring plate to set the inner connection side piece (9) to connect with the main beam, and set the outer connection side piece (10) to connect with the side beam by tilting up likewise below, here the two places are the top of the spring plate With the connection structure of the side beam and the main beam, he can complete the oblique triangular connection structure of the side beam and the main beam, and finally set up the outer connecting side pieces (10 ) at the joint between the end of the head and the side beam is fitted with a spring plate connecting plate (7), and the spring plate connecting plate (7) includes a side beam connecting piece (22) with a connecting screw hole and a spring plate Hold tight piece (23); image 3 Mark the situation shown in point 7, the spring plate connecting plate (7) will be folded to further tighten the structure of the outer connecting side piece (10) after fitting the outer wall of the side beam, wrap it inside, and then follow the spring plate connecting plate ( 7) Completely weld and seal the front and back, and completely tighten the outer connection side piece (10), so that the connection degree between the spring plate and the side beam is very high;
 continue as image 3As shown on the right, the beam connecting plate (6) is integrally shaped into a concave structure, including the top patch (12) and the side patch (13) and the horizontal plate (6a) connecting them in the middle. At the lower side corner (3), his top patch (12) will hang at the junction of the main beam and the side beam at an arc angle, and the sides and bottom will let the lower side corner (3), forming a smaller Cavity structure, the top is buckled on the top surface of the upper wall of the side sill, the cross-section of the side patch is U-shaped arched and fitted outside the inner wall of the side sill, and the bottom part is buckled and contacted with the inner plate of the spring plate Yes, the head end of the beam connecting plate (6) is also provided with a main beam connecting piece (14), and the cross section of the main beam connecting piece (14) is U-shaped and arched and fitted outside the lower side wall of the main beam; this arrangement Comparing the transition angle structure from the side beam to the main beam, it can maintain the overall elasticity without making the structure too rigid;
 like Figure 7 As shown, the inner connection side piece (9) and the outer connection side piece (10) of the side spring plate (5) or the inner connection side piece (9) are buckled by the side piece (15) integrally provided on the top, and the side There is a crotch structure at the top of the clip buckle (15), and after being connected to the outer wall of the beam connecting plate (6) by buckling or hanging action, it is connected with the main beam and the side beam.
 like image 3 In the situation shown on the left, the oblique space (16) left between the outer connecting side piece (10) and the side beam is basically not insufficient in the prior art, and it will actually cause the spring to tilt inward There will be no support, so the present invention is provided with a shock absorber bracket (17) with a special structure in the oblique space (16). The shock absorber bracket (17) is U-shaped as a whole, including the bracket bottom plate (18 ) and the outstretched piece (19) extended from its two sides, the outset piece (19) is set to match the distance and shape of the side beam and the side spring plate (5), that is, to fill the oblique Angular space position (16) must be trapezoidal or triangular, so we have Figure 7 As shown below, then the outstretched piece (19) is extended according to the position connected to the side beam and the side spring plate (5), that is, as Figure 4 In the situation shown, the bottom of the outstretched sheet (19) will be attached to the side beam and the lower wall of the side spring plate (5) respectively, one left and one right, respectively, and welding will be carried out after the fitting setting is completed to allow them to be integrated. After this result is completed, the force compensation structure at the lower corner (3) will be further strengthened, that is, when the stress or downward pull reaches the position of the oblique space (16), it will be squeezed outward and elastically Back, the outstretched sheet (19) will retract and bounce back like a shrapnel to strengthen the flexibility of the entire structure.
 Preferably, the outstretched sheet (19) is S-shaped or L-shaped. This is mainly the bottom structure that can surround the spring plate at the front end and provide more welding surfaces.
 Preferably, the side sill as a whole is L-shaped or J-shaped, including the outer sill (20) and the side left sill (21), and both the outer sill (20) and the side left sill (21) are It is a U-shaped sheet, and the two are assembled into a tube structure with a circular or square cross-section. The side beam is not a structure that is formed by bending and torsion of the whole pipe, but a structure that is welded and assembled after stamping or water expansion, so that the production speed is relatively fast and will not be limited by the pipe structure.
 Preferably, an interface connecting piece (24) is also provided at the interface of the main beam (1) and the side beam (2). This side engagement structure can strengthen the connection ability between the side beam and the spring disc pack.
 Preferably, the spring disk connecting plate (7) includes a side beam connecting piece (22) provided with connection screw holes and a spring disk holding piece (23). This folding structure further enhances the interconnection ability of the spring disks at the bottom of the side sills as described above.
 Preferably, the position where the interface connecting piece (24) is set is set symmetrically with the beam connecting plate (6). This structure secures the center and top sides of the side members, and the load at the top of the side members provides the attachment points.
 Preferably, the bottom plate of the main beam (1) protrudes upwards and is configured to be inflated so that the cross-section is V-shaped or U-shaped. This structure can strengthen the overall load-bearing capacity and divide the stress into two sides.
 The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.