CN216895244U - a connecting pin - Google Patents

Abstract

The utility model discloses a connecting pin shaft which comprises a pin shaft, wherein two ends of the pin shaft are respectively detachably connected with a fixed end cover, and the fixed end covers are respectively detachably connected with a connecting seat; first round pin shaft hole and second round pin shaft hole have been seted up on the connecting seat respectively, are equipped with the bearing between the connecting seat, and the round pin axle passes first round pin shaft hole, the hole and the second round pin shaft hole of bearing in proper order, and the round pin axle can be dismantled respectively with bearing and connecting seat and be connected. The vertical grinding machine has the advantages of simple structure and convenience in installation, the service lives of the hydraulic cylinder bearing and the pin shaft can be prolonged, the times of replacing the bearing are reduced, meanwhile, the maintenance cost, the labor cost and the like are reduced, the operation rate of the vertical grinding machine is finally improved, and the economic benefit is increased.

Description

a connecting pin

technical field

The utility model relates to the technical field of mechanical equipment, in particular to a connecting pin.

Background technique

At present, in various vertical mills, hydraulic cylinders are generally used in conjunction with hydraulic stations to provide the grinding force required for grinding. One end of the hydraulic cylinder is connected to the base plate at the bottom, and the other end is connected to the upper rocker arm. On the lower side, the two connecting parts are connected by pins to connect the various components into one. Because the grinding force required for grinding is very large, and the continuous swing of the rocker arm during the operation of the vertical mill will have a great impact on the bearing of the hydraulic cylinder, the life of the bearing is generally not too long, and many users are dismantling it. When replacing the bearing, it is difficult to pull out the pin due to the deformation of the connecting pin, and some even need to gouging the pin as a whole, which brings a lot of trouble to the entire maintenance process and increases the maintenance time and maintenance cost.

Utility model content

The purpose of the utility model is to provide a connecting pin shaft for the shortcomings of the prior art.

In order to achieve the above purpose, the present invention provides a connection pin, including a pin, two ends of the pin are detachably connected with fixed end caps, respectively, and the fixed end caps are respectively detachably connected with the connection seat; the connection seat A first pin shaft hole and a second pin shaft hole are respectively opened on the upper part, and a bearing is arranged between the connecting seats. The pin shaft passes through the first pin shaft hole, the inner hole of the bearing and the second pin shaft hole in sequence. The pin shaft is detachably connected with the bearing and the connecting seat respectively.

Further, the pin shaft is a cylinder, and there are several layers of steps on it, the diameter of the steps decreases in turn, each step transition position is provided with a chamfer, and the end faces at both ends of the pin shaft are respectively provided with at least one first thread. The middle part of the fixed end cover is provided with a first bolt hole corresponding to the first threaded hole.

Further, a plurality of second bolt holes are evenly arranged on the periphery of the edge of the fixed end cover, and second threaded holes corresponding to the second bolt holes are arranged on the connecting seat.

Further, the number of the steps is five, which are the first step, the second step, the third step, the fourth step and the fifth step, the first step is matched with the first pin shaft hole, and the first step is The three steps are matched with the inner hole of the bearing, and the fifth step is matched with the second pin shaft hole; after the pin shaft is installed, the starting position of the second step is in the first pin shaft hole, and the starting position of the fourth step is in the bore of the bearing.

Further, the pin shaft and the fixed end cover are connected by a first bolt pair, and the fixed end cover and the connecting seat are connected by a second bolt pair, and the first bolt pair and the second bolt pair are high. Strength bolts.

Further, there is a gap between the pin shaft and the fixed end cover after being installed.

Further, the pins are 45# steel pins.

Beneficial effects: The pin structure of the utility model makes the small deformation of the pin after long-term use not affect the disassembly of the pin, and the pin is fixed through the connection structure, and finally the high-frequency rotation generated during operation occurs in the bearing. Between the outer ring and the ball, abnormal wear is reduced, and the service life of the pin shaft and the bearing is prolonged; the utility model has a simple structure and is easy to install, which can prolong the service life of the hydraulic cylinder bearing and the pin shaft, reduce the times of replacing the bearing, and at the same time Reduce maintenance costs, labor costs, etc., and ultimately improve the operation rate of the vertical mill and increase economic benefits.

Description of drawings

Fig. 1 is the installation structure schematic diagram of the connecting pin shaft of the embodiment of the present invention;

Fig. 2 is the structural representation of the pin shaft of the embodiment of the present invention;

3 is a schematic structural diagram of a fixed end cap according to an embodiment of the present invention;

Fig. 4 is the enlarged structure diagram of A district in Fig. 1;

FIG. 5 is an enlarged structural view of the B area in FIG. 1 .

In the figure: 1, pin; 2, fixed end cover; 3, the first bolt pair; 4, the second bolt pair; 5, the first pin hole; 6, bearing; 7, the second pin hole; 11, The first step; 12, the second step; 13, the third step; 14, the fourth step; 15, the fifth step; 21, the first bolt hole; 22, the second bolt hole; 31, the first threaded hole; 41 , the second threaded hole.

Detailed ways

Below in conjunction with the accompanying drawings and specific embodiments, the present utility model will be further clarified. The present embodiment is implemented on the premise of the technical solution of the present utility model. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the present utility model. range.

As shown in Figures 1 to 5, the embodiment of the present invention provides a connecting pin, including a pin 1, the pin 1 can be selected as a 45-gauge steel pin, and the material strength of the pin 1 should be equal to or better than 45-gauge steel , the surface of pin 1 needs to be hardened. Both ends of the pin shaft 1 are respectively detachably connected with a fixed end cover 2 , the end faces of the two ends of the pin shaft 1 are respectively provided with at least one first threaded hole 31 , and the middle of the fixed end cover 2 is provided with a first bolt corresponding to the first threaded hole 31 . The hole 21, the pin shaft 1 and the fixed end cover 2 are detachably connected through the first bolt pair 3. The fixed end cover 2 is respectively detachably connected with the connecting seat, a plurality of second bolt holes 22 are evenly arranged around the edge of the fixed end cover 2, the connecting seat is provided with a second threaded hole 41 corresponding to the second bolt hole 22, and the fixed end The cover 2 and the connecting seat are connected by a second bolt pair 4 . The first bolt pair 3 and the second bolt pair 4 are both high-strength bolts.

A first pin shaft hole 5 and a second pin shaft hole 7 are respectively opened on the connection seat, a bearing 6 is arranged between the connection seats, and the pin shaft 1 passes through the first pin shaft hole 5, the inner hole of the bearing 6 and the second pin shaft in turn. The pin shaft hole 7, the pin shaft 1 and the bearing 6 and the connecting seat are respectively detachably connected.

The pin shaft 1 is a cylinder, and there are several layers of steps on it. The diameter of the steps decreases in turn from left to right, and increases in turn in the reverse direction. Each step transition position is provided with a chamfer. Specifically, the number of steps is five. , respectively the first step 11, the second step 12, the third step 13, the fourth step 14 and the fifth step 15, the first step 11 is matched with the first pin shaft hole 5, the third step 13 is matched with the bearing 6 The inner holes are matched with each other, specifically, transition fit is optional, and the fifth step 15 is matched with the second pin shaft hole 7 .

The existing pin shaft will be slightly deformed when used for a long time, especially the edge of the pin shaft in contact with the hole is easily deformed, forming a small step or bulge, which makes it difficult to remove the pin shaft during disassembly, thereby affecting the The maintenance work is carried out. In this embodiment, after the pin shaft 1 is installed, the initial position of the second step 12 is in the first pin shaft hole 5, the initial position of the fourth step 14 is in the inner hole of the bearing 6, and the two ends of the pin shaft 1 are connected to the inner hole of the bearing 6. There is a gap between the fixed end covers 2, so that after long-term use, the deformation of the second step 12 occurs in the first pin shaft hole 5, and the deformation of the fourth step 14 occurs in the inner hole of the bearing 6. With the existence of the chamfer, all the deformation will not affect the disassembly of the pin shaft, and it also has a certain protective effect on the connecting seat. Without affecting disassembly, the pin 1 can also be reused many times, thereby reducing the cost of spare parts.

When in use, the pin shaft 1 is inserted from the end of the small diameter, passes through the first pin shaft hole 5, the inner hole of the bearing 6 and the second pin shaft hole 7 in sequence, and then the fixed end cover 2 is installed on the connection through the second bolt pair 4. On both sides of the seat, the pin shaft 1 and the fixed end cover 2 are installed and connected through the first bolt pair 3. At this time, the pin shaft 1, the fixed end cover 2, the connecting seat and the inner ring of the bearing 6 are fixed together to form a whole. The pin shaft 1 cannot rotate relative to the connecting seat, the inner ring of the bearing 6 connected with the pin shaft 1 will not rotate, and the contact surface between the pin shaft 1 and the inner ring of the bearing 6 will not be severely worn, and there will be no There is a gap. During operation, high-frequency alternating rotation occurs between the inner and outer rings of the bearing 6 and the balls, thereby reducing abnormal wear. The bearing in this embodiment is a bearing on a hydraulic cylinder. Using this embodiment For example, the hydraulic cylinder can be used more stably and the impact can be reduced, thereby prolonging the service life of the pin shaft 1 and the bearing 6.

In general, the utility model is not only simple in structure and convenient in installation, but also can prolong the service life of the hydraulic cylinder bearing and the pin shaft, and can also reduce the number of times of replacing the bearing, and also reduce the maintenance cost, labor cost, etc., and finally improve the The operation rate of the vertical mill increases economic benefits.

The above are only the preferred embodiments of the present invention, and it should be pointed out that for those skilled in the art, other parts that are not specifically described belong to the prior art or common knowledge. On the premise of not departing from the principle of the present invention, several improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (6)

1. A connecting pin shaft is characterized by comprising a pin shaft, wherein two ends of the pin shaft are respectively detachably connected with a fixed end cover, and the fixed end covers are respectively detachably connected with a connecting seat; the connecting seat is respectively provided with a first pin shaft hole and a second pin shaft hole, a bearing is arranged between the connecting seats, the pin shaft sequentially passes through the first pin shaft hole, an inner hole of the bearing and the second pin shaft hole, the pin shaft is detachably connected with the bearing and the connecting seats respectively, the pin shaft is a cylinder, a plurality of steps with sequentially decreasing diameters are arranged on the pin shaft, a chamfer is arranged at the transition position of each step, the number of the steps is five, the steps are respectively a first step, a second step, a third step, a fourth step and a fifth step, the first step is matched with the first pin shaft hole, the third step is matched with the inner hole of the bearing, and the fifth step is matched with the second pin shaft hole; after the pin shaft is installed, the starting position of the second step is in the first pin shaft hole, and the starting position of the fourth step is in the inner hole of the bearing.

2. The connecting pin shaft according to claim 1, wherein the pin shaft has at least one first threaded hole on each of the end faces thereof, and the fixing end cap has a first bolt hole corresponding to the first threaded hole in the middle thereof.

3. The connecting pin shaft as claimed in claim 1, wherein a plurality of second bolt holes are uniformly formed around the edge of the fixing end cap, and the connecting seat is provided with second threaded holes corresponding to the second bolt holes.

4. The connecting pin according to claim 1, wherein the pin is connected to the fixed end cap by a first bolt pair, the fixed end cap is connected to the connecting seat by a second bolt pair, and the first bolt pair and the second bolt pair are high-strength bolts.

5. A connecting pin according to claim 1, characterised in that there is a gap between the pin and the fixed end cap after the pin has been installed.

6. The connecting pin of claim 1, wherein said pin is a 45 gauge steel pin.

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