A pin connection structure

Abstract

The present invention discloses a pin connection structure, comprising: a pin, the middle section of which is a cylinder, and both ends of which are truncated cones, and the joint of the cylinder and the truncated cone is provided with an annular positioning groove; a connector sleeved on the pin, both ends of which are clearance-matched with the cylinder of the pin, the positioning groove extends out of the end face of the connector, and a clamping plate is clamped into the positioning groove; baffles are respectively located on both sides of the connector, and the baffles are provided with truncated cone holes, which are tightly matched with the truncated cones at the ends of the pin, and bolts are sequentially passed through the through holes on the baffles and the through holes on the clamping plate and then threadedly connected to the ends of the connector. The present invention provides a pin connection structure, which can effectively prevent the pin from breaking or moving, prolong the service life of the pin, avoid potential accidents, ensure safe production, and reduce production costs.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical manufacturing, and in particular relates to a pin shaft connection structure. Background Art

[0002] In mechanical manufacturing, pins are widely used in hinged connections between two components. At present, the axial positioning of pins is mostly done by cardboard positioning, that is, card slots are machined at both ends of the pin, cardboard is installed in the card slot, and the cardboard is fixed to the component with bolts to prevent the pin from rotating and axial movement. However, in actual use, due to high temperature, dust, insufficient lubrication and other reasons, the pin will generate a large torque and cut off the cardboard bolts, causing the cardboard to fall off, the pin to jump out or break, thus causing major safety accidents and direct economic losses to the company.

[0003] The Chinese patent specification (publication number: CN105202012A) discloses a pin shaft, which adopts the following technical solution: a first slope surface and a second slope surface are respectively provided at both ends of the pin shaft, an expansion sleeve is respectively fitted on the first slope surface and the second slope surface, and an axial through hole is provided on the pin shaft, and a bolt is passed through the through hole to connect the expansion sleeve and the pin shaft as a whole, thereby improving the service life and connection accuracy of the pin shaft. However, there are still some shortcomings in adopting this technical solution. First, the expansion sleeve is in the hinged through hole, and it is easy to break under the action of the rotational torque. Second, the through hole is provided on the pin shaft body, which reduces the mechanical strength of the pin shaft. Summary of the invention

[0004] In order to solve the above-mentioned problems, the present invention proposes a pin shaft connection structure, which can effectively prevent the pin shaft from breaking or moving, thereby extending the service life of the pin shaft, avoiding potential accidents, ensuring safe production, and reducing production costs.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions, including:

[0006] A pin shaft, the middle section of which is a cylinder, and both ends of which are frustum bodies, and a ring-shaped positioning groove is provided at the joint of the cylinder and the frustum body;

[0007] A connector sleeved on the pin shaft, both ends of the connector are clearance-matched with the cylindrical body of the pin shaft, the positioning groove extends out of the end face of the connector, and the clamping plate is clamped into the positioning groove;

[0008] The baffles are respectively located on both sides of the connector, and are provided with truncated cone holes, which are tightly matched with the truncated cone bodies at the ends of the pin shafts. Bolts pass through the through holes on the baffles and the through holes on the clamping plates in sequence and then are threadedly connected to the ends of the connectors.

[0009] Both ends of the pin shaft are respectively provided with an annular oil groove, which is located in the cylindrical part of the pin shaft. The end surfaces of the truncated cone bodies at both ends of the pin shaft are respectively provided with oil filling holes, and the oil filling holes are connected with the oil grooves in a one-to-one correspondence.

[0010] The oil filling hole is connected with the oil groove, and a radial oil through hole is opened at the bottom of the oil groove, and the oil through hole is connected with the axial oil filling hole.

[0011] An asbestos pad is arranged between the end surface of the connector and the clamping plate.

[0012] The taper of the truncated cone is 1:2.

[0013] The outer side surface of the baffle and the end surface of the truncated cone are engraved with scale lines connected in a straight line.

[0014] The end surface of the truncated cone is also provided with a pair of mirror-symmetrical correction holes, and the correction holes are located on the scale line.

[0015] The present invention provides a pin shaft connection structure, which can effectively prevent the pin shaft from breaking or moving, thereby extending the service life of the pin shaft, avoiding potential accidents, ensuring safe production, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the pin shaft of the present invention.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure decomposition of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can have a clearer understanding. Figure 1 , Figure 2 , Figure 3 As shown, the present invention includes:

[0020] A pin 6, the middle section of which is a cylinder, and both ends of which are truncated cones, and a ring-shaped positioning groove 7 is provided at the joint between the cylinder and the truncated cone;

[0021] A connector 2 is sleeved on the pin shaft, both ends of the connector are clearance-matched with the cylindrical body of the pin shaft, the positioning groove extends out of the end face of the connector, and the clamping plate 14 is clamped into the positioning groove;

[0022] The baffles 8 are respectively located on both sides of the connector, and are provided with truncated cone holes, which are tightly matched with the truncated cone bodies at the ends of the pin shafts. The bolts 5 pass through the through holes on the baffles and the through holes on the clamping plate in sequence and then are threadedly connected to the ends of the connector.

[0023] Furthermore, an annular oil groove 11 is provided at both ends of the pin shaft, and the oil groove is located in the cylindrical part of the pin shaft. The end faces of the truncated cone bodies at both ends of the pin shaft are provided with oil filling holes 9, and the oil filling holes are connected to the oil grooves one by one.

[0024] Preferably, the oil filling hole is connected with the oil groove, and a radial oil through hole is opened at the bottom of the oil groove, and the oil through hole is connected with the axial oil filling hole.

[0025] Furthermore, an asbestos pad 15 is provided between the end surface of the connector and the clamping plate.

[0026] Preferably, the taper of the frustum is 1:2.

[0027] Furthermore, the outer side surface of the baffle and the end surface of the truncated cone are engraved with scale lines 13 connected in a straight line.

[0028] Furthermore, the end surface of the truncated cone is provided with a pair of mirror-symmetrical correction holes 12, which are located on the scale line.

[0029] When the present invention is used to hinge two components, one of the components can be connected to the connecting body, and the other component can be sleeved on the middle section of the pin.

[0030] The present invention adopts a baffle with a truncated cone hole to closely match the truncated cone body at the end of the pin shaft, and the pin shaft is firmly clamped on the connecting body, so that the pin shaft cannot move; under abnormal circumstances, when the rotational torque exceeds a certain limit, the truncated cone bodies at both ends of the pin shaft can rotate in the truncated cone hole of the baffle plate, so that the pin shaft can be self-protected and prevented from being broken due to excessive torque. At the same time, the abnormal rotation can be displayed through the misalignment of the scale line, which is convenient for timely maintenance; the provision of a correction hole is conducive to the correction of the pin shaft during maintenance.

[0031] The present invention provides a pin shaft connection structure, which can effectively prevent the pin shaft from breaking or moving, thereby extending the service life of the pin shaft, avoiding potential accidents, ensuring safe production, and reducing production costs.

[0032] The present invention is not limited to the above-mentioned specific embodiments. As long as baffles with conical holes are connected at both ends of the connector, and the conical holes are tightly matched with the conical bodies at the ends of the pin shafts, no matter what forms the baffles and connectors adopt, they are within the scope of protection claimed by the present invention.

Claims

1. A pin connection structure, characterized in that: include: A pin (6), the middle section of the pin is a cylinder, both ends of the pin are truncated cones, and the joint between the cylinder and the truncated cone is provided with an annular positioning groove (7); A connector (2) sleeved on the pin shaft, both ends of the connector being clearance-matched with the cylindrical body of the pin shaft, the positioning groove extending out of the end surface of the connector, and the clamping plate (14) being clamped into the positioning groove; Baffles (8) are respectively located on both sides of the connecting body, and the baffles are provided with truncated cone holes, and the truncated cone holes are tightly matched with the truncated cone bodies at the ends of the pin shafts. Bolts (5) are passed through the through holes on the baffles and the through holes on the clamping plates in sequence and then threadedly connected to the ends of the connecting body. The outer side surface of the baffle and the end surface of the truncated cone are engraved with scale lines (13) connected in a straight line.

2. The pin connection structure according to claim 1, characterized in that: An annular oil groove (11) is provided at each end of the pin shaft. The oil groove is located in the cylindrical part of the pin shaft. The end surfaces of the truncated cone bodies at both ends of the pin shaft are provided with oil injection holes (9) respectively. The oil injection holes are connected to the oil grooves in a one-to-one correspondence.

3. The pin connection structure according to claim 2, characterized in that: The oil filling hole is connected with the oil groove, and a radial oil through hole is opened at the bottom of the oil groove, and the oil through hole is connected with the axial oil filling hole.

4. The pin connection structure according to claim 1, characterized in that: An asbestos pad (15) is provided between the end surface of the connector and the clamping plate.

5. The pin connection structure according to claim 1, characterized in that: The taper of the truncated cone is 1:

2.

6. The pin connection structure according to claim 5, characterized in that: The end surface of the truncated cone is also provided with a pair of mirror-symmetrical correction holes (12), which are located on the scale line.

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