Thrust rod ball head capable of increasing torque

Abstract

A thrust rod ball head capable of increasing torque comprises a shell, a transition section and a connecting rod, the two ends of the transition section are seamlessly connected with the shell and the connecting rod to form a whole, a corrugated section, a transition section and a non-circular section are arranged in the circumferential direction of the connecting rod, the outer side of the cross section of the corrugated section is in an arc shape, and the outer side of the cross section of the non-circular section is in an oval shape or a broken line shape. The inner side of the transition section is seamlessly connected with the corrugated section, and the outer side of the transition section is seamlessly connected with the non-circular section. The transition section and the non-circular section are arranged on the two sides of the corrugated structure of the connecting rod of the ball head, so that the torque in the circumferential direction when the ball head is sleeved with the sleeve is increased, relative rotation of the ball head and the sleeve is prevented, normal work of the thrust rod is guaranteed, and the maintenance frequency and the maintenance cost of the thrust rod are reduced. And the whole ball head is integrally cast by metal, so that compared with the conventional ball head, the surface of the corrugated structure of the connecting rod is rougher, the tensile strength between the sleeve and the connecting rod is improved, and the weight is lighter.

Description

Technical Field

[0001] The utility model relates to a ball head of a thrust rod, in particular to an improvement of a connecting rod of the ball head of the thrust rod. Background Art

[0002] At present, the connecting rod of the thrust rod ball head is cylindrical or has a bellows structure on the surface. After the ball head is hot-riveted with the sleeve, although the bellows structure can greatly increase the connection strength of the sleeve and the connecting rod of the ball head in the axial direction, during long-term use, the connection between the sleeve and the connecting rod of the ball head in the circumferential direction is prone to loosening, and the sleeve and the connecting rod of the ball head are prone to relatively rotating with a small torque, thereby causing relative rotation between the sleeve and the ball head, which seriously affects the use of the thrust rod.

[0003] The following patents were found to be similar to this application:

[0004] The utility model with application number 201821414963.6 and name “Aluminum Alloy Split V-type Thrust Rod” discloses an aluminum alloy split V-type thrust rod, which is composed of a sleeve, a ball head and a ball joint. The V-shaped ball head is connected to the ball heads at both ends by a sleeve, and the ball joint is installed in the through hole of the ball head; the neck of the ball head is a combination of an elliptical shape and an arc shape, which improves the bearing capacity. The material of the thrust rod is aluminum alloy, and the preferred composition is Al-Cu alloy, Al-Si alloy, Al-Mg-Si alloy, Al-Zn-Mg-Cu alloy or Al-Mg alloy, and aluminum alloys with trace alloying elements such as Sr, La, Ce, Y, Sc, Er, Nb, B, Cr, etc. added to the above aluminum-based alloy. The aluminum alloy thrust rod ball head is made by casting process, and the sleeve is made by extrusion process. The sleeve and the ball head are assembled by integral hot riveting, and the thrust rod obtained has a weight reduction effect of 40 to 70% compared with a traditional thrust rod made of steel.

[0005] The utility model with application number 201920448953.2 and name “A lightweight thrust rod ball head structure” discloses a lightweight thrust rod ball head structure, which is composed of a ball head shell, a connecting rod and a non-circular segment connecting the ball head shell and the connecting rod; it is characterized in that: a corrugated structure is provided on the connecting rod, and the corrugated structure is composed of a plurality of concave portions with curvature and a plurality of convex portions with curvature, and the concave portions and the convex portions are alternately arranged on the connecting rod; the concave portions have troughs, and the convex portions have crests; for each convex portion, a first transition arc is provided between the convex portion and the adjacent concave portion on the side close to the ball head shell, and a second transition arc is provided between the convex portion and the adjacent concave portion on the side away from the ball head shell, and the radius of the first transition arc is smaller than the radius of the second transition arc. The thrust rod ball head structure of the utility model can ensure that the connection between the sleeve and the ball head is not easy to loosen, the sleeve and the connecting rod fit tightly, it is easier to form during riveting, the connecting rod is not easy to break, the reliability is higher, and the service life is longer.

[0006] The utility model with application number 201821481635.8 and name “An intermediate connection structure of a support rod” discloses an intermediate connection structure of a support rod, including an inner tube, an outer tube, a screw, a screw sleeve, a ball head, an inner tube guide sleeve and an outer tube guide sleeve. The inner tube guide sleeve is threadedly connected to the outer side of the inner tube, the outer tube guide sleeve is threadedly connected to the inner side of the outer tube, and both are fixed with glue. The inner tube guide sleeve is sleeved on the outer side of the outer tube guide sleeve and adopts an interference fit. The screw plus two stainless steel gaskets and a plastic gasket riveted at one end thereof form a combined screw. The plastic gasket is in the middle of the two stainless steel gaskets. One end of the screw sleeve is combined with the screw nut by reverse thread, interference fit, glue addition and mold riveting. The end of the combined screw without the gasket is threadedly connected to the screw nut, the ball head is threadedly connected to the end of the screw sleeve with an external thread, and is fixed with glue. Pins are used to connect the threaded connection parts of the two. The utility model has a simple structure, uses fewer mechanical parts and materials, is easy to install, reduces production time, has a stable and safe structure, and is waterproof and dustproof.

[0007] Although the connecting rod of the ball head of the above-mentioned patent has a corrugated structure or a threaded structure, the corrugated structure is a circular structure that is a full circle in the circumferential direction, which makes it difficult for the sleeve and the connecting rod of the ball head to generate a large torque in the circumferential direction, and it is difficult to prevent the sleeve and the connecting rod of the ball head from rotating relative to each other in the circumferential direction during long-term use. Utility Model Content

[0008] The technical problem to be solved by the utility model is to increase the torque of the connecting rod of the sleeve and the ball head in the circumferential direction to prevent the sleeve and the ball head from rotating relative to each other.

[0009] In view of the above problems, the technical solution proposed by the utility model is: a thrust rod ball head for increasing torque, comprising a shell, a transition section and a connecting rod, the two ends of the transition section are seamlessly connected to the shell and the connecting rod respectively to form a whole, a corrugated section, a gradient section and a non-circular section are arranged in the circumferential direction of the connecting rod, the outer side of the cross section of the corrugated section is an arc shape, the outer side of the cross section of the non-circular section is an ellipse and / or a broken line shape, the inner side of the gradient section is seamlessly connected to the corrugated section, and the outer side of the gradient section is seamlessly connected to the non-circular section.

[0010] Preferably, the corrugated section includes corrugated convex strips and corrugated concave strips, the outer sides of the corrugated convex strips are convex outward, the outer sides of the corrugated concave strips are concave inward, and the corrugated convex strips and the corrugated concave strips are alternately distributed in the length direction of the connecting rod.

[0011] Preferably, the inner side of the gradient section is smoothly connected to both the corrugated convex strips and the corrugated concave strips, and the outer side of the gradient section is smoothly connected to the non-circular section, so that the structure of the corrugated section can smoothly and gradually change to the structure of the non-circular section, thereby making the corrugated section and the non-circular section smoothly connected and smoothly transitioned.

[0012] Preferably, a mounting hole penetrating the shell is opened in the middle of the shell, so that the shell is in a circular ring shape.

[0013] Preferably, the transition section is Y-shaped, the upper end of the transition section is seamlessly connected to the outer side of the shell, and the lower end of the transition section is seamlessly connected to the connecting rod.

[0014] Preferably, the ball head has one or two connecting rods. When there is only one connecting rod, the ball head has a bilaterally symmetrical structure, and its axis of symmetry is the axis center of the connecting rod.

[0015] Preferably, when there are two connecting rods, each connecting rod is connected to the shell through a transition section, and the two connecting rods, the two transition sections and the shell are connected to form a V-shaped structure.

[0016] The beneficial technical effect of the utility model is that by setting the gradual change section and the non-circular section on both sides of the corrugated structure of the connecting rod of the ball head, the torque in the circumferential direction when the ball head is sleeved in the sleeve is increased, and the relative rotation between the ball head and the sleeve is prevented, thereby ensuring the normal operation of the thrust rod and reducing the maintenance times and maintenance costs of the thrust rod. The entire ball head is made of metal integrally molded and cast. Compared with the existing ball head, the surface of the corrugated structure of the connecting rod is rougher, which improves the tensile strength between the sleeve and the connecting rod and is lighter in weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment;

[0018] Figure 2 This is a schematic diagram of the main viewing direction of the first embodiment;

[0019] Figure 3This is a schematic diagram of the main viewing direction of the second embodiment;

[0020] In the figure: shell 1, transition section 2, corrugated convex strips 31, corrugated concave strips 32, non-circular section 33, gradual section 34. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the embodiments and drawings: Embodiment 1

[0022] like Figure 1 and Figure 2 As shown, the ball head of the thrust rod includes a housing 1, a transition section 2 and a connecting rod, and the two ends of the transition section 2 are seamlessly connected to the housing 1 and the connecting rod to form a whole. The connecting rod is provided with a corrugated section, a gradient section 34 and a non-circular section 33 in the circumferential direction, wherein the corrugated section includes a corrugated convex strip 31 and a corrugated concave strip 32. The outer sides of the cross sections of the corrugated convex strip 31 and the corrugated concave strip 32 are both arc-shaped, and the outer side of the cross section of the non-circular section 33 is elliptical and / or broken line-shaped, the inner side of the gradient section 34 is seamlessly connected to the corrugated section, and the outer side of the gradient section 34 is seamlessly connected to the non-circular section 33. The non-circular sections 33 are provided on both sides of the corrugated section so that when the sleeve of the thrust rod is sleeved on the connecting rod, the torque of the ball head in the circumferential direction when the sleeve is sleeved on the connecting rod can be increased to prevent the ball head and the sleeve from rotating relative to each other.

[0023] The outer side of the corrugated ridge 31 is convex outward, the outer side of the corrugated groove 32 is concave inward, and the corrugated ridge 31 and the corrugated groove 32 are alternately distributed in the length direction of the connecting rod. The inner side of the gradient section 34 is smoothly connected to both the corrugated ridge 31 and the corrugated groove 32, and the outer side of the gradient section 34 is smoothly connected to the non-circular section 33, so that the structure of the corrugated section can be smoothly and gradually changed to the structure of the non-circular section 33, so that the corrugated section and the non-circular section 33 are smoothly connected and smoothly transitioned. In this embodiment, the structure of the entire connecting rod is like cutting out a non-circular structure on both sides of the existing connecting rod with a bellows structure, and then cutting out a gradient section 34 for a smooth transition between the bellows structure and the non-circular structure. However, the bellows structure on the existing connecting rod is machined, while the entire ball head in this embodiment is cast by injecting liquid metal into the ball head mold, so the corrugated section, the gradient section 34 and the non-circular section 33 in the circumferential direction of the connecting rod are all integrally formed, that is, the entire ball head is free of processing. The bellows on the connecting rod of the existing ball head are machined, while the corrugated structure in this embodiment is cast, which can have a rougher structure, thereby improving the tensile strength between the sleeve and the connecting rod. In addition, the integrally formed structure can simplify the structure of the ball head, such as reducing the number of corrugations, so the weight of the ball head in this embodiment is also lighter.

[0024] In this embodiment, the ball head has a connecting rod with a mounting hole in the middle of the body penetrating the housing 1, so that the housing 1 is annular. The transition section 2 is Y-shaped, the upper end of the transition section 2 is seamlessly connected to the outer side of the housing 1, and the lower end of the transition section 2 is seamlessly connected to the connecting rod. The entire ball head is a bilaterally symmetrical structure, and its symmetry axis is the axis of the connecting rod. Embodiment 2

[0025] The difference between this embodiment and the first embodiment is that the ball head has two connecting rods, each connecting rod is connected to the housing 1 via a transition section 2, and the two connecting rods, the two transition sections 2 and the housing 1 are connected to form a V-shaped structure.

[0026] Obviously, without departing from the principle of the present invention, several improvements or modifications made should be regarded as within the protection scope of the present invention.

Claims

1. A thrust rod ball head for increasing torque, comprising a housing, a transition section and a connecting rod, wherein the two ends of the transition section are seamlessly connected to the housing and the connecting rod to form a whole, characterized in that: A corrugated section, a gradient section and a non-circular section are arranged in the circumferential direction of the connecting rod. The outer side of the cross section of the corrugated section is in an arc shape, and the outer side of the cross section of the non-circular section is in an elliptical shape and / or a broken line shape. The inner side of the gradient section is seamlessly connected to the corrugated section, and the outer side of the gradient section is seamlessly connected to the non-circular section.

2. A thrust rod ball head for increasing torque according to claim 1, characterized in that: The corrugated section includes corrugated convex strips and corrugated concave strips. The outer sides of the corrugated convex strips are convex outwards, the outer sides of the corrugated concave strips are concave inwards, and the corrugated convex strips and the corrugated concave strips are alternately distributed in the length direction of the connecting rod.

3. A thrust rod ball head for increasing torque according to claim 2, characterized in that: The inner side of the gradient section is smoothly connected to the corrugated convex strips and the corrugated concave strips, and the outer side of the gradient section is smoothly connected to the non-circular section, so that the structure of the corrugated section can smoothly and gradually change to the structure of the non-circular section, thereby making the corrugated section and the non-circular section smoothly connected and smoothly transitioned.

4. A thrust rod ball head for increasing torque according to claim 3, characterized in that: A mounting hole penetrating the shell is provided in the middle of the shell, so that the shell is in a circular ring shape.

5. A thrust rod ball head for increasing torque according to claim 4, characterized in that: The transition section is Y-shaped, the upper end of the transition section is seamlessly connected to the outer side of the shell, and the lower end of the transition section is seamlessly connected to the connecting rod.

6. A thrust rod ball head for increasing torque according to claim 5, characterized in that: The ball head has one or two connecting rods. When there is only one connecting rod, the ball head is a bilaterally symmetrical structure, and its symmetry axis is the axis center of the connecting rod.

7. A thrust rod ball head for increasing torque according to claim 6, characterized in that: When there are two connecting rods, each connecting rod is connected to the housing through a transition section, and the two connecting rods, the two transition sections and the housing are connected to form a V-shaped structure.

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