CN104454958A - Pin-shaft-middle-single-face-planed hinged connection - Google Patents

Abstract

The invention discloses a single-sided flattened hinge connection in the middle of a pin shaft, which comprises: a single lug seat, a pin shaft, a double lug seat, screws and the like. According to the invention, the pin shaft only needs to pass through a group of double lug seat pin shaft holes, and then the pin shaft and the single lug seat are fixedly connected by screws. The middle part of the pin shaft is only cut into a flat surface on the side that is in contact with the screw head, and the other side is kept as a cylindrical surface. The corresponding single lug seat contact surface is processed into a cylindrical concave surface, so that the pin shaft and the single lug seat can be automatically centered when pressed. , that is, the center points of the connection between the pin shaft and the single and double ear seats are all on the pin shaft axis. After the screws are tightened, the required rotational connection can be fully formed between the single lug seat and the double lug seat. It avoids the fact that the pin shaft needs to pass through the three pin holes of the double lug seat and the single lug seat at the same time, especially there is a high-precision dynamic fit between the pin shaft and the pin hole, and the volume and weight of the connected workpiece and the pin shaft are uneven When it is larger, the difficulty of installation is significantly improved.

Description

A single-sided flattened hinge connection in the middle of the pin shaft

technical field

The invention relates to a single-sided flattened hinge connection in the middle of a pin shaft, which is mainly used for the hinge connection in performance testing and installation of large workpieces, and belongs to the field of electromechanical technology.

Background technique

In the current installation and connection of products, pin hinges are generally used for connection. The traditional pin connection device is usually composed of a single ear seat, a pin shaft, and a double ear seat. See Figure 1, single ear seat and double ear seat. Pin holes are provided on the lugs, and the pins pass through the lower pin hole of the double lug, the pin hole of the single lug and the upper pin hole of the double lug in turn to form a hinged connection. Since the pin shaft needs to pass through the three holes of the lower pin hole of the double lug seat, the pin shaft hole of the single lug seat and the upper shaft pin hole of the double lug seat at the same time, especially there is a dynamic movement with high precision between the pin shaft and the pin shaft hole. At the same time, if the product has a large working load and the pin shaft has a large volume and weight, the difficulty of installation will be greatly increased. In the process of product performance testing, it is also necessary to realize the installation and connection of products. If there are many products that need performance testing, the installation and connection of products will generate a lot of workload. Therefore, in order to reduce the installation and connection during product performance testing To reduce the workload of product testing and improve the efficiency of product testing, it is necessary to find a simple and convenient hinged connection method for ear sockets. Especially for the low-load performance test of the product, the connection between the pin shaft and the pin shaft hole requires only a low strength requirement. This invention proposes a single-sided flattened hinged connection in the middle of the pin shaft for the low-load performance test of the product. This method can reduce the difficulty of installation and connection in the process of product performance testing, reduce the workload of product testing, and greatly improve the efficiency of product testing.

Contents of the invention

In order to reduce the difficulty of installation and connection in the process of product performance testing, reduce the workload of product testing, and greatly improve the efficiency of product testing, this invention proposes a single-sided flattened hinged connection method for the middle part of the pin shaft when the product is tested for low-load performance. .

In order to achieve the above object, technical scheme of the present invention is as follows:

A single-sided flattened hinge connection in the middle of the pin shaft, including: a single lug seat, a pin shaft, a double lug seat and screws;

The amphorae include an upper ear seat and a lower ear seat of the amphorae, a cylindrical upper ear seat pin hole is provided on the upper ear seat of the amphorae, and a cylindrical pin hole is opened on the lower ear seat of the amina. Cylindrical lower trunnion pin hole; the pin is a cylinder, and the right side of the middle part of the cylindrical side is axially processed into a groove to form the right plane of the middle part of the pin shaft, and the left side of the middle part of the pin shaft remains the original cylinder The surface is the left cylindrical surface of the middle part of the pin shaft, and the two ends outside the groove of the pin shaft are still cylinders, which are divided into an upper cylinder and a lower cylinder; the upper cylinder and the upper ear seat pin of the double ear seat The shaft hole is in contact, the lower cylinder is in contact with the pin hole of the lower ear seat of the double ear seat, and the pin shaft and the double ear seat pass through the cylindrical outer surface of the upper cylinder and the lower cylinder and the upper ear seat pin of the double ear seat The cylindrical inner surface of the shaft hole and the pin hole of the lower trunnion contact to form a dynamic fit hinge connection; a middle hole of the pin shaft is radially opened between the right plane of the middle part of the pin shaft and the left cylindrical surface of the middle part of the pin shaft, and the single The right side of the lug seat is processed with a connecting cylindrical surface B, the connecting cylindrical surface B on the right side of the single lug seat is offset against the left cylindrical surface in the middle of the pin shaft, the screw passes through the hole in the middle part of the pin shaft, and is screwed into the single lug seat screw Press the cylinder B on the right connecting surface of the single lug seat and the left cylindrical surface in the middle of the pin shaft to ensure a reliable connection between the pin shaft and the single lug seat; the pin shaft forms a fixed connection with the single lug seat through screws , the pin shaft and the double lug seat form a dynamic fit hinge through the cylindrical shaft hole, and relative rotation can be generated between the single lug seat and the double lug seat through the pin shaft.

The hole in the above-mentioned bearing pin middle part is a kind of in circular hole, square hole, oblong hole, waist-shaped hole.

The contact surface on the right side of the lug seat is a cylindrical surface or a V-shaped groove.

The present invention changes the original structure in which one pin needs to go through three holes to form a hinge, and only needs to pass through a set of holes (two coaxial holes on the same workpiece), and then the pin shaft and the workpiece with a single ear seat pass through. Screw fixed connection. Since the hole on the pin shaft can be made larger, it is much easier for the screw to be screwed into the connection plane of the single lug seat through the hole. In addition, the right side of the single lug seat is processed into a cylindrical surface, so that the single lug seat and the pin shaft It is easy to be centered automatically during docking. After the screws are tightened, the two connected workpieces can bear tension and compression in the axial direction, and there is no gap, which fully meets the work needs. This connection method reduces installation difficulty and improves installation efficiency.

Description of drawings

Fig. 1 is a traditional ear seat hinge diagram;

Fig. 2 is a structural representation of the present invention;

FIG. 3 is a cross-sectional view of D-D in FIG. 2 .

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 2 and 3, a single-sided flattened hinge connection in the middle of the pin shaft includes: a single ear seat 1, a pin shaft 2, a double ear seat 3 and a screw 4.

The double ear seat 3 comprises the upper ear seat 3-1 of the double ear seat and the lower ear seat 3-2 of the double ear seat, the upper ear seat 3-1 of the double ear seat is provided with a cylindrical upper ear seat pin hole 5, and A cylindrical lower ear seat pin hole 6 is provided on the ear seat 3-2 under the seat; the pin shaft 2 is a cylinder, and the right end side of the middle part of the cylindrical side is axially processed into a groove 7 to form a right side of the middle part of the pin shaft. Plane 2-2, keep the original cylindrical surface on the left side of the middle part of the pin shaft as the left cylindrical surface 2-1 on the left side of the middle part of the pin shaft, and the two ends outside the groove 7 of the pin shaft 2 are still cylinders, which are divided into the upper cylinder 2- 4 with the lower cylinder 2-5. The upper cylinder 2-4 is in contact with the upper ear seat pin hole 5 of the upper ear seat 3-1 of the amphorae, and the lower cylinder 2-5 is in contact with the lower ear seat pin hole 6 of the lower ear seat 3-2 of the amphorae Contact, the pin shaft 2 and the double ear seat 3 pass through the cylindrical outer surface of the upper cylinder 2-4 and the lower cylinder 2-5 and the upper ear seat pin hole 5 and the lower ear seat pin hole 6 of the double ear seat The cylindrical inner surfaces contact to form a motion-fit hinged connection. Between the right plane 2-2 of the middle part of the pin shaft and the cylindrical surface 2-1 of the left side of the middle part of the pin shaft, there is a hole 2-3 in the middle part of the pin shaft radially. The side connection cylindrical surface B is offset against the left cylindrical surface 2-1 in the middle of the pin shaft, the screw 4 passes through the hole 2-3 in the middle part of the pin shaft, and is screwed into the screw hole 1-1 of the single lug seat, and the right connecting surface of the single lug seat The cylinder B is pressed against the left cylindrical surface 2-1 in the middle of the pin shaft to ensure a reliable connection between the pin shaft 2 and the lug seat 1. The pin shaft 2 forms a fixed connection with the single lug seat 1 through the screw 4, the pin shaft 2 and the double lug seat 3 form a dynamic joint through the cylindrical shaft hole, and the single lug seat 1 and the double lug seat 3 pass through the pin shaft 2 Can produce relative rotation.

The hole 2-3 in the middle part of the above-mentioned bearing pin 2 can be a circular hole, a square hole, an elongated hole, or a waist-shaped hole.

The contact surface on the right side of the ear seat may be a cylindrical surface or a V-shaped groove.

The principle of single-sided flattened hinge connection in the middle of the pin shaft: insert the pin shaft 2 into the cylindrical hole of the double ear seat 3 on the workpiece to be connected, so that the cylindrical hole of the upper ear seat 3-1 of the double ear seat contacts the upper cylindrical surface of the pin shaft 2, double The cylindrical hole of the ear seat 3-2 under the ear seat is in contact with the lower cylindrical surface of the pin shaft 2 to form a dynamic fit hinge, and then the left cylindrical surface 2-1 of the middle part of the pin shaft of the pin shaft 2 is connected to the cylindrical surface B on the right side of the single ear seat To counterbalance, use the screw 4 to pass through the hole 2-3 in the middle of the pin shaft, and screw it into the screw hole 1-1 of the single lug seat, and press the cylindrical surface 2-1 on the left side of the middle part of the pin shaft and the connecting cylindrical surface B on the right side of the single lug seat , to ensure a reliable connection between the pin shaft 2 and the lug seat 1. The pin shaft 2 forms a fixed connection with the single lug seat 1 through the screw 4, the pin shaft 2 and the double lug seat 3 form a dynamic fit and hinge through the upper and lower cylindrical shaft holes, and the single lug seat 1 and the double lug seat 3 pass through the pin shaft 2 can produce relative rotation.

If the workpiece to be articulated does not have a single-ear seat or a double-ear seat, a structure that can be fixedly connected to the connected workpiece can be designed on the single-ear seat or double-ear seat, so that the workpiece and the ear seat can be fixed in advance.

The present invention changes the original structure in which one pin needs to go through three holes to form a hinge, and only needs to pass through a set of holes (two coaxial holes on the same workpiece), and then the pin shaft and the workpiece with a single ear seat pass through. Screw fixed connection. Since the hole on the pin shaft can be made larger, it is much easier for the screw to be screwed into the connection plane of the single lug seat through the hole. In addition, the right side of the single lug seat is processed into a cylindrical surface, so that the single lug seat and the pin shaft It is easy to be centered automatically during docking. After the screws are tightened, the two connected workpieces can bear tension and compression in the axial direction, and there is no gap, which fully meets the work needs. This connection method reduces installation difficulty and improves installation efficiency.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (3)

1. A single-sided flattened hinge connection in the middle of the pin shaft, which is characterized in that it includes: a single lug seat, a pin shaft, a double lug seat and screws; The amphorae include an upper ear seat and a lower ear seat of the amphorae, a cylindrical upper ear seat pin hole is provided on the upper ear seat of the amphorae, and a cylindrical pin hole is opened on the lower ear seat of the amina. Cylindrical lower trunnion pin hole; the pin is a cylinder, and the right side of the middle part of the cylindrical side is axially processed into a groove to form the right plane of the middle part of the pin shaft, and the left side of the middle part of the pin shaft remains the original cylinder The surface is the left cylindrical surface of the middle part of the pin shaft, and the two ends outside the groove of the pin shaft are still cylinders, which are divided into an upper cylinder and a lower cylinder; the upper cylinder and the upper ear seat pin of the double ear seat The shaft hole is in contact, the lower cylinder is in contact with the pin hole of the lower ear seat of the double ear seat, and the pin shaft and the double ear seat pass through the cylindrical outer surface of the upper cylinder and the lower cylinder and the upper ear seat pin of the double ear seat The cylindrical inner surface of the shaft hole and the pin hole of the lower trunnion contact to form a dynamic fit hinge connection; a middle hole of the pin shaft is radially opened between the right plane of the middle part of the pin shaft and the left cylindrical surface of the middle part of the pin shaft, and the single The right side of the lug seat is processed with a connecting cylindrical surface B, the connecting cylindrical surface B on the right side of the single lug seat is offset against the left cylindrical surface in the middle of the pin shaft, the screw passes through the hole in the middle part of the pin shaft, and is screwed into the single lug seat screw Press the cylinder B on the right connecting surface of the single lug seat and the left cylindrical surface in the middle of the pin shaft to ensure a reliable connection between the pin shaft and the single lug seat; the pin shaft forms a fixed connection with the single lug seat through screws , the pin shaft and the double lug seat form a dynamic fit hinge through the cylindrical shaft hole, and relative rotation can be generated between the single lug seat and the double lug seat through the pin shaft. 2. A single-sided flattened hinge connection in the middle of the pin shaft according to claim 1, characterized in that: the hole in the middle of the pin shaft is a circular hole, a square hole, an elongated hole, or a waist-shaped hole. A sort of. 3. A single-sided flattened hinge connection in the middle of the pin shaft according to claim 1, characterized in that: the contact surface on the right side of the single lug seat is a cylindrical surface or a V-shaped groove.