388 results about "Torsional rigidity" patented technology

The invention relates to the technical field of cables, and discloses a weather-proof high-strength tensile aerial insulated cable and a preparation method thereof.The weather-proof high-strength tensile aerial insulated cable comprises a cable conductor, a protection mechanism is arranged outside the cable conductor, a supporting mechanism is arranged inside the protection mechanism, and an outer sheath is connected to the outside of the protection mechanism through a cushioning mechanism; the exterior of the cable conductor is fixedly connected with a force bearing layer, the exterior of the force bearing layer is provided with a repairing layer, the exterior of the repairing layer is fixedly connected with a heat insulation fireproof layer, the cushioning mechanism comprises an elastic rubber layer, and the inner side of the elastic rubber layer is fixedly connected to the exterior of the heat insulation fireproof layer. According to the invention, through the hollow bionic structure with the diaphragm in the core tubular bearing layer, the self weight is greatly reduced, and excellent bending resistance and torsional rigidity are provided at the same time; when the bearing layer is accidentally impacted, the internal diaphragm can effectively prevent longitudinal spreading of microcracks like a firewall, and damage is limited locally.

The invention relates to the technical field of vehicle control, in particular to a torque control method and device of a vehicle transmission system and electronic equipment. The method includes: acquiring actually measured torsion angular velocity; calculating a transmission shaft torsion angular velocity, a transmission shaft torsion angle and a transmission shaft torsion rotating speed based on the actually measured torsion angular velocity; calculating the torque of the transmission shaft based on the pre-obtained equivalent damping coefficient and equivalent torsional rigidity as well as the calculated torsion angular velocity and torsion angle of the transmission shaft; calculating the required torque of the driven shaft based on the calculated torque of the transmission shaft and the pre-obtained load torque of the wheel end; anti-oscillation compensation torque is calculated according to the calculated torsion rotating speed of the transmission shaft and the pre-obtained rotational inertia of the driving end and the equivalent damping coefficient; and superposing the anti-oscillation compensation torque at the previous moment to the calculated required torque of the driven shaft to obtain the compensated required torque of the driven shaft, and outputting the compensated required torque of the driven shaft. The torque can be accurately controlled, and pause or movement is avoided.

The invention relates to the technical field of automobile part structures, in particular to a cabin beam structure, a cabin assembly and an automobile. Comprising a cross beam body which is of a plate-shaped structure arranged in the Y direction, and lap joint faces are arranged at the two ends of the cross beam body; the lap joint faces completely cover and are fixed to the upper end faces of the corresponding tower bases in a lap joint mode. The connecting plates are arranged at intervals in the Y direction, one ends of the connecting plates are arranged on the side, facing the front wall plate, of the cross beam body, and the other ends of the connecting plates are fixed to the front wall plate. According to the cabin cross beam structure, the integration degree is greatly improved, the comprehensive cost is greatly reduced through the lightweight design, in addition, the torsional rigidity of a vehicle body is improved through the adopted multi-claw structure, and the connecting strength of the cabin cross beam and a tower base is improved.

The utility model provides a front cabin connecting structure and a vehicle. The front cabin connecting structure comprises a front longitudinal beam, a front wheel cover side reinforcing beam assembly, a front anti-collision beam assembly and an upper cross beam. And the front longitudinal beam is connected with one side of the front anti-collision beam assembly. The front wheel cover side reinforcing beam assembly comprises a side reinforcing beam and a connecting cavity. The side reinforcing beams are located above the front longitudinal beams and connected with the front longitudinal beams through the connecting cavities. And the side reinforcing beam is connected with one side of the upper cross beam. The side reinforcing beam is connected with the upper cross beam and is connected with the front longitudinal beam through the connecting cavity, so that the force transmission efficiency is improved, the structure is simple, all parts of the vehicle body are uniformly stressed, and the overall torsional rigidity of the vehicle body is improved.

The invention discloses a prefabricated heat preservation groove type plate floor slab system of an assembly type steel structure trestle, and relates to the technical field of groove type prefabricated heat preservation floor slabs, the prefabricated heat preservation groove type plate floor slab system comprises an anti-skid face plate and a heat preservation bearing mechanism, the heat preservation bearing mechanism is arranged at the bottom of the anti-skid face plate, the heat preservation bearing mechanism comprises a plurality of sealing plates, and the sealing plates are arranged in the anti-skid face plate. The multiple sealing plates are arranged and located at the bottom of the anti-skid panel, multiple second supporting blocks are arranged at the bottoms of the sealing plates, groove-shaped plates are arranged on the outer sides of the multiple second supporting blocks, structural blocks are integrally formed through pouring and extruding, reinforcing strips are arranged on the inner walls of the structural blocks, and the structural blocks and annular hoops form a two-way constraint combined framework which can bear bending moment and shearing force; therefore, the bending resistance, the shearing resistance, the torsional rigidity and the overall bearing capacity of the plate body are improved on the premise that heat preservation is not affected on the whole, the engineering problems are avoided, and normal construction work and construction time are maintained.

A cross frame for a bicycle, such as an e-bike, includes a head tube and a seat tube with a bottom bracket area arranged at the lower end of the seat tube, a straight first tube starting from the head tube which crosses the seat tube and then extends towards a rear dropout of a rear triangle of the cross frame, a second tube starting from the head tube above the first tube which crosses the first tube at an intersection and then extends towards the bottom bracket area, and at least one chain stay extends from the bottom bracket area to the rear dropout. The second tube has an angular deflection within the plane of the frame in the section between the head tube and the intersection to create a visually appealing frame that offers high stability and torsional rigidity with minimal weight and allows for improved handling of a bicycle equipped with the frame.

The invention relates to the technical field of transmission shaft machining, in particular to a kinetic energy transmission shaft body and a machining process integrating pultrusion, weaving, winding and glue injection, the kinetic energy transmission shaft body comprises a shaft body, the shaft body is formed by winding a continuous composite material reinforced thermosetting resin prepreg tape, and a composite material comprises a reinforcing material, a base material, a functional additive and filler; a plurality of limiting grooves are formed in the inner wall of the shaft body, the limiting grooves extend in the axial direction of the shaft body, the length of the limiting grooves is consistent with that of the shaft body, and pultrusion, weaving, winding and glue injection processes are organically integrated, so that the manufactured kinetic energy transmission shaft body has high specific strength, high torsional rigidity, excellent interlayer bonding performance and good dynamic stability; meanwhile, a limiting groove can be precisely machined in the inner wall of the shaft body, the high-precision torque transmission requirement is met, and the defects that a traditional metal shaft body is heavy and prone to corrosion and layers of a single composite material shaft body are prone to layering are overcome.

The utility model discloses a front overhang longitudinal pushing support, an off-highway mining dump truck frame and an off-highway mining dump truck, the front overhang longitudinal pushing support comprises a pair of main vertical plates, a pair of front vertical plates, a pair of front vertical plates, a pair of rear vertical plates and a pair of rear vertical plates, the top plate is arranged at the tops of the pair of main vertical plates and is used for connecting the pair of main vertical plates; and the fixing pipe is arranged between the pair of main vertical plates and is used for mounting a thrust rod. Through reasonable structural design, borne force can be effectively dispersed, force from a front suspension part is effectively transmitted to the frame longitudinal beam, the main vertical plate is supported through the fixing pipe, so that the front suspension longitudinal thrust support has good structural strength and torsional rigidity, the fixing reliability of a front thrust rod can be guaranteed, and the front thrust rod is prevented from being damaged. Therefore, the front thrust rod can accurately exert the function of controlling the front overhang movement of the vehicle.

Disclosed is a guidewire configured to provide high torsional stiffness without detrimentally increasing bending stiffness. Such a device provides a high ratio of torsional stiffness to bending stiffness. The guidewire device includes a core with a proximal section and a distal section. The distal section of the core is coupled to a microfabricated outer tube such that the distal section of the core passes into and is encompassed by the outer tube.

The invention discloses a body-in-white sensitivity simulation method and electronic equipment. The body-in-white sensitivity simulation method comprises the steps of generating a component file for storing part information based on the part information; variable material thickness information filled by a user of each component is obtained, and a torsional rigidity calculation file is generated for each component; all the torsional rigidity calculation files are sent to simulation calculation software, and based on a result file, the torsional rigidity value of each component after the component is updated into the variable material thickness information is determined; and obtaining the sensitivity of the part corresponding to each assembly. According to the method, repeated and tedious work is automatically realized, strict control is facilitated in the whole process of obtaining the sensitivity of the body-in-white, the workload of manual operation is greatly reduced, possible attribute errors caused by human negligence of engineers in the process of obtaining component attributes through pretreatment are avoided, and the sensitivity of the body-in-white is improved. The work efficiency of pre-treatment and post-treatment of the engineer is greatly improved, and the engineer can conveniently put more energy into structure optimization and weight reduction.

This invention relates to the field of blade crown structure technology and discloses a method for designing the oblique cut angle of crowned blades. By defining the direction and magnitude of the oblique cut angle of the crowned blade and defining evaluation parameters for the rationality of the static design of the crowned blade, simulation models of crowned blades with different sizes and directions of oblique cut angles on the crown contact surface are constructed. Static analysis is performed on the simulation models, and the oblique cut angle and magnitude of the contact surface are determined based on the static evaluation parameters. This invention solves the problems of excessive static stress in the blade due to pre-twist during assembly of crowned blades and crown misalignment due to rubbing. In particular, it addresses the following issues: for short blades with crowns and small aspect ratios and large torsional stiffness, even a small pre-twist angle design can still result in excessive stress. Reducing the pre-twist angle makes it difficult to ensure that the pre-twist angle tolerance meets requirements during processing and assembly. Using traditional improvement methods requires significant modifications to the blade, limiting engineering applications and affecting other blade performance.

The invention discloses a hydraulic bushing with excellent torsion performance. The hydraulic bushing comprises an outer pipe, and a hydraulic main spring assembly used for second-stage vibration reduction and a solid bushing assembly used for first-stage vibration reduction are sequentially and concentrically arranged in the outer pipe from outside to inside; the hydraulic main spring assembly comprises a first middle pipe, and the outer side wall of the first middle pipe is connected with the inner side wall of the outer pipe through a first rubber body. The solid bushing assembly comprises a second middle pipe and an inner pipe, and the outer side wall of the second middle pipe is connected with the inner side wall of the first middle pipe; the inner pipe is arranged in the second middle pipe, and the outer side wall of the inner pipe is connected with the inner side wall of the second middle pipe through a second rubber body. The damping device is provided with the first-stage damping solid bushing assembly and the second-stage damping hydraulic main spring assembly, and the hydraulic main spring assembly on the outer side provides a hydraulic characteristic and meanwhile provides a part of rigidity characteristic. When the hydraulic main spring assembly on the outer side is twisted and the torsion reaches a certain degree, the solid lining assembly on the inner side not only provides axial and radial rigidity, but also starts to provide the torsional rigidity characteristic.

This invention discloses a precision right-angle reducer torsional stiffness and backlash detection device, belonging to the field of precision gear performance testing technology. The device includes support blocks, with mounting plates fixedly connected between the tops of multiple support blocks. A first connecting plate is fixedly connected to the front end of the top of each mounting plate, and multiple second connecting plates are slidably connected to the rear end of the top of each mounting plate. A test piece is fixedly connected to the top of one of the second connecting plates, and adjustment components are installed on the tops of two of the second connecting plates. A clamping component is installed between the bottoms of the two adjustment components. A test component is installed on the top of the first connecting plate. By setting adjustment components, this invention makes the testing process more flexible, significantly shortening the time spent on equipment replacement and readjustment, improving testing efficiency, and thus better aligning with the rapid operation of the production line, reducing the possibility of production delays.

According to the forecabin reinforcing structure, three triangular frame structures are adopted, reinforcing ribs are evenly distributed on all frames, a left shock absorber support and a right shock absorber support are connected with a front wall assembly to form a firm cage type structure, a force transmission path is increased, and therefore the torsional rigidity and the modality of a body in white and the dynamic rigidity of shock absorber installation points in all directions are greatly improved; the frame structures are all made of aluminum alloy materials, are formed through casting, and are light in weight, simple in manufacturing process and high in manufacturing precision.

This application relates to a vehicle, a laser radar mounting bracket, and its mounting structure (10). The mounting structure (10) of the laser radar mounting bracket includes a rigid support part (11), an elastic support part (12), and a first connecting member (13). The rigid support part (11) is provided on the bracket body (20). The elastic support part (12) is fixedly connected to the rigid support part (11). The first connecting member (13) is for connection to the laser radar (30), and the first connecting member (13) is fitted into the elastic support part (12). Since the first connecting member (13) is connected to the rigid support part (11) via the elastic support part (12), it exhibits vibration damping and sound damping effects. Furthermore, since the first connecting member (13) is fitted into the elastic support part (12) and the elastic support part (12) is fixedly connected to the rigid support part (11), torsional rigidity is also exhibited, resulting in good mounting stability of the laser radar (30) on the laser radar mounting bracket.

A submersible hydraulic assembly (6) for an energy storage plant (1) comprises: • at least one hydraulic machine (12); • at least one first buoyancy chamber (46, 50, 63) filled with at least one first buoyancy element (47, 51, 64); the at least one first buoyancy chamber (46, 50, 63) being configured in such a way that the hydraulic machine (12) is substantially neutrally buoyant when submerged in an environmental liquid. The invention further relates to an energy storage plant (1), to a method for performing maintenance operations on an energy storage plant (1) and to a method for assembling / disassembling an energy storage plant (1).

The invention provides an aeroelastic model vibration test device with variable bending and torsional modal stiffness, which comprises a plane moving mechanism, a magneto-rheological damping device and a torsional stiffness device, and is characterized in that the magneto-rheological damping device is mounted on the plane moving mechanism, and a model is connected with the magneto-rheological damping device through the torsional stiffness device; the torsional rigidity device comprises a connecting piece, a rotary shifting piece and an elastic mechanism, the connecting piece is connected to the magnetorheological damping device, the elastic mechanism is connected to the connecting piece, the rotary shifting piece is connected with the model, the rotary shifting piece and the magnetorheological damping device are coaxial, and the elastic mechanism is shifted to twist when the rotary shifting piece rotates. The magnetorheological fluid is used for damping, the response is fast, the damping force is stable, and the controllability is good; and through the plane moving mechanism and the torsional rigidity device, the coupling effect in the downwind direction, the transverse wind direction and the torsional direction can be achieved, the test requirement of multi-degree-of-freedom structure response is met, and the complex dynamic characteristics of an actual structure under the wind load effect are reflected more truly.

To provide a drive shaft for a vehicle capable of making right and left parts common while equalizing torsional rigidity on the right and left sides.SOLUTION: Any one of the outer circumferential surface spline teeth formed at both ends of the intermediate shaft and the inner circumferential surface spline teeth formed at the first joint and the second joint has a helix angle. The torsion angle is formed such that the inclination direction is opposite between the power source side and the drive wheel side. Accordingly, in a case where the vehicle drive shaft has common specifications on the left and right sides, the substantial axial length for transmitting power is likely to be equal on the left and right sides, and thus the torsional rigidity of the vehicle drive shaft is likely to be equal on the left and right sides. Therefore, in the vehicle drive shaft, it is possible to achieve commonality of components on the left and right sides while making the torsional rigidity equal on the left and right sides.SELECTED DRAWING: Figure 1

The utility model discloses a two-wheeled electric bicycle bearing type frame which comprises a head tube, a left side protection plate and a right side protection plate, fixing holes are formed in the front side fixed connecting ends of the left side protection plate and the right side protection plate, and a cushion support is fixedly connected to the top ends of the sides, away from the head tube, of the left side protection plate and the right side protection plate. Reinforcing plate structures are fixedly installed on the rear sides of the ends, away from the head pipe, of the left side protection plate and the right side protection plate. According to the bearing type frame of the two-wheeled electric bicycle, the front cross beam structure and the rear cross beam structure are each designed to be of a double-cross-beam structure, the torsional rigidity and the bearing capacity of the frame are remarkably improved, local stress is dispersed through the design of the reinforcing plate structures and the pipe holes, the stability of the damping supports and the head pipe on the two sides is improved, and therefore the overall stability and durability of the frame are improved; the whole frame is designed to be of a U-shaped structure, the design is reasonable, installation is convenient and fast, the installation space of key components is optimized, and the turning stability and the high-speed driving performance of the vehicle are improved.

The utility model discloses a frame type rotating shaft and a wind turbine generator. The frame type rotating shaft comprises a plurality of rotating shaft unit pieces, and each rotating shaft unit piece is composed of a flange connecting section and a middle connecting section. The two middle connecting sections are arranged in a crossed mode to form a crossed node, and one ends of the two middle connecting sections and the end portion of the flange connecting section jointly form a bending point of the rotating shaft unit piece. The flange connecting sections of the first group of rotating shaft unit pieces and the flange connecting sections of the second group of rotating shaft unit pieces are arranged in parallel, and the second ends of the middle connecting sections of the two groups of rotating shaft unit pieces are mutually connected. And the two groups of rotating shaft units are arranged around the rotating axis of the frame-type rotating shaft to form the frame-type rotating shaft. The structure further comprises middle supporting pieces for connection, and the adjacent cross nodes are connected through the middle supporting pieces. The frame-type rotating shaft is low in material consumption and light in weight, and the unit cost is reduced. And meanwhile, the wind resistance cross section is small, the wind speed attenuation is small, and the utilization of wind energy is greatly improved. The special shape can ensure better bending and torsional rigidity and strength.

The invention relates to the technical field of cross beam bases, in particular to a horizontal measurement tool which comprises a cross beam and two bases, a reinforcing assembly is arranged on the surface of the cross beam, the two bases are symmetrically arranged below the two ends of the cross beam respectively, and the reinforcing assembly comprises a connecting sleeve arranged on the surface of the cross beam in a sleeving mode; by means of the inclined auxiliary beams distributed in the wave shape, the arch supporting effect on the middle of the cross beam can be achieved, deformation of the cross beam caused by gravity influence at the position can be reduced to the maximum extent, meanwhile, the overall weight of the base can be reduced by forming the cavity, and through the arrangement of the cylindrical supporting pieces and the *-shaped ribs, the service life of the base can be prolonged. The cylindrical structure has excellent radial rigidity and torsional rigidity, and the diverging ribs which are shaped like the Chinese character'mi 'and surround the cylindrical structure can uniformly and efficiently disperse concentrated loads (such as force transmitted by a beam body) from the upper part to the whole bottom surface of the base, so that the strength and the stability of the base can be ensured under the condition that the weight of the base is reduced.

The utility model relates to the field of numerical control machine tools, and discloses a machine tool stand column of a numerical control machine tool, which comprises a plurality of supporting plates, the supporting plates are respectively fixed on the left side and the right side of a stand column body, connecting plates are fixed among the supporting plates, and the connecting plates are fixed with the stand column body. Two sliding rails are fixed to the front side of the stand column body, reinforcing ribs are fixed to the four corners of the top face of the stand column body, and a plurality of containing grooves are formed in the rear side of the stand column body. According to the utility model, the supporting plate is matched with the connecting plate, so that the cutting force and the gravity borne by the stand column body can be uniformly dispersed to the base, the local stress concentration is avoided, the bending resistance and the torsion resistance of the stand column body can be effectively improved, the shaking phenomenon of the stand column body is prevented, and the rigidity of the stand column body is improved; by increasing or reducing the balancing weights, a worker can conveniently adjust the gravity center position of the stand column body, and it is ensured that a machine tool is kept stable under the high-speed movement or high-load working condition.

This invention relates to the field of vehicle technology and discloses a spare tire mounting device and a vehicle. The spare tire mounting device includes a first connecting part, a second connecting part, and a spare tire mounting part. The first connecting part is connected to a first frame of the vehicle's tailgate frame assembly, and the second connecting part is connected to a second frame of the tailgate frame assembly. The spare tire mounting part provides a mounting point for the spare tire assembly located in the vehicle's trunk space. Applying the technical solution of this invention can solve the problem of limited spare tire placement in some vehicles in the prior art and can improve the torsional stiffness of the vehicle's rear structure.

The utility model relates to valve technical field, specifically disclose a gate valve valve rod with reinforcing rib structure, include: valve rod base, it is the cylindrical rod body of two -way stainless steel is made, and valve rod base top end has valve rod body, valve rod body and valve rod base are integral, and valve rod base and valve rod body jointly constitute the valve rod of gate valve. This has the gate valve valve rod with reinforcing rib structure, through annular equidistance distribution's trapezoidal reinforcing rib rod and the strip -shaped sliding slot of valve rod body inlay, the bending -resistant, torsional rigidity of take the handle of valve, and trapezoidal section optimization stress distribution effectively reduces the bending deformation risk under high -pressure working condition, and two -way stainless steel material's valve rod base and valve rod body integral molding, combine the local reinforcing effect of reinforcing rib rod, and the flush design of reinforcing rib rod and valve rod body avoids stress concentration point, reduces the risk of fatigue crack generation, along with the synergistic effect of positioning rod and limit ring, reduce the friction loss between moving parts.

The utility model belongs to an automobile rear floor assembly structure in the technical field of automobile parts. Comprising a rear floor framework (1) and a rear floor body (12), the rear floor framework (1) comprises a left rear longitudinal beam front body (2) and a right rear longitudinal beam front body (3), one end of a rear floor front cross beam (4) is connected with the left rear longitudinal beam front body (2), the other end of the rear floor front cross beam (4) is connected with the right rear longitudinal beam front body (3), one end of a spare tire rear supporting bracket (5) is connected with the left rear longitudinal beam front body (2), and the other end of the spare tire rear supporting bracket (5) is connected with the right rear longitudinal beam front body (3). The other end of the spare tire rear supporting bracket (5) is connected with a right rear longitudinal beam front body (3), and the spare tire rear supporting bracket (5) is connected with a rear floor front cross beam (4) through a rear floor spare tire beam body (6). The automobile rear floor assembly structure is simple in structure and capable of improving torsional rigidity and modality.

According to the unmanned aerial vehicle rotor wing blade, the C-shaped beams are bonded to the front side and the rear side of the middle foam, the middle foam is clamped between the blade root metal lining and the blade tip foam lining and is wound into a whole through the winding girder, the winding girder and the C-shaped beams are bonded together to form a double-layer reinforcing beam structure, centrifugal force is resisted, and the flapping, shimmy and torsional rigidity of the blade is improved; the middle foam with the C-shaped beam, the blade root metal lining and the blade tip foam lining serve as internal supports for winding the girder, the winding quality and efficiency are improved, an integral structure of the blade root metal lining and the girder is formed, the bearing capacity of a blade body and blade root metal connecting interface is improved, the risk of interface failure of the blade root is effectively reduced, and the service life of the blade is prolonged. And the blade structure safety is improved. The impact-resistant explosion-proof coating is adopted as the front edge covering edge, the manufacturing period is shortened, later maintenance is facilitated, direct winding on a mold is achieved, the forming operation process is simplified, and the forming efficiency of the blade is improved on the premise that the same protection capacity of the impact-resistant explosion-proof coating and a metal covering edge is guaranteed.

The invention relates to the field of spaceflight components, in particular to a high-rigidity high-torque two-degree-of-freedom sailboard driving mechanism which comprises a main support, an A-axis driving assembly, a double-axis connecting support, a B-axis driving assembly and a sailboard connecting support, the A-axis driving assembly is connected with a star through the main support, one end of the double-axis connecting support is fixedly connected with the output end of the A-axis driving assembly, and the other end of the double-axis connecting support is fixedly connected with the output end of the B-axis driving assembly; the other end of the double-shaft connecting support is fixedly connected with the B-shaft driving assembly, one end of the sailboard connecting support is fixedly connected with the output end of the B-shaft driving assembly, and the other end of the sailboard connecting support is connected with the sailboard. The A-axis driving assembly and the B-axis driving assembly are each internally provided with a motor and a harmonic gear reducer so that the torsional rigidity of the output end can be larger than or equal to 12000 Nm / rad, and the output torque can be larger than 44 Nm. And the solar panel is driven to point to the sun and the power / signal transmission function is realized.

The invention provides a back door assembly and a vehicle, and relates to the field of vehicle engineering.The back door assembly comprises a back door outer plate and a back door inner plate, and the back door inner plate is connected with the back door outer plate; the back door inner plate is provided with an upper area, a lower area and a boundary beam arranged around the back door inner plate. The section of the upper area protrudes towards the direction close to the back door outer plate; the cross section of the lower area protrudes in the direction away from the back door outer plate, and at least the cross section of the transversely-arranged edge beam is in a step shape. Thus, the section of the upper area protrudes towards the direction close to the back door outer plate, the width of a window frame opening can be shortened on the premise that the view field is guaranteed, and the rigidity of the area is guaranteed; the section of the lower area protrudes in the direction away from the back door outer plate, so that the distance between the back door inner plate and the back door outer plate is increased, and a large storage space is formed in the back door. Meanwhile, the cross section of at least the transversely-arranged edge beam is in a step shape, and the torsional rigidity and the collision impact resistance of the back door assembly are further improved.

The invention relates to a pendulum device (1) comprising a pendulum (2) with a horizontal pendulum axis (24) and with a horizontal axis (31) of a shelf (3) arranged in the upper end region of the pendulum (2), the weight of which is balanced by a counterweight (42) arranged in the lower end region of the pendulum. The pendulum device (1) can be connected to the furniture (5) via a receiving device (11) with a coupling device (12) that can be connected to the furniture (5). The pendulum (2) comprises a first pendulum rod (21) extending from the horizontal pendulum axis (24) to the upper end region, which is connected to the pendulum axis (24) by means of a first fastening device (13) and to the horizontal axis (31) of the shelf (3) by means of an upper fastening device (14). In order to achieve a particularly stable and torsionally rigid support, it is proposed that the pendulum (2) has a second pendulum rod (22) extending from the horizontal pendulum axis (24) to the upper end region, which together with the first pendulum rod (21) supports the horizontal axis (31) against the pendulum axis (24).