Clamp rocker arm adjusting mechanism with replaceable eccentric shaft

Abstract

The clamp rocker arm adjusting mechanism with the replaceable eccentric shaft comprises a clamp moving cam, a rocker arm, a transmission shaft and a clamp mechanism assembly, the clamp moving cam is in transmission fit with the rocker arm, the eccentric shaft is detachably connected to the end, away from the clamp moving cam, of the rocker arm, and the eccentric shaft is in transmission connection with the clamp mechanism assembly through the transmission shaft. The clamp rocker arm adjusting mechanism with the replaceable eccentric shaft effectively solves the problem of abrasion of the clamp moving cam caused by long-term use, that is, when the clamp moving cam is abraded, the stroke of a clamp mechanism assembly can be accurately and finely adjusted only by replacing or adjusting the eccentric shaft, the whole cam assembly does not need to be replaced, and the work efficiency is greatly improved. By means of the design, the maintenance cost is greatly reduced, the debugging time of the clamp mechanism assembly is remarkably shortened, and therefore precious production time is saved. In addition, errors can be compensated by adjusting the eccentric shaft, the requirement for the machining precision of the clamp moving cam is lowered, and then the manufacturing cost of the clamp moving cam is reduced.

Description

Technical Field

[0001] This utility model relates to the field of machining equipment technology, and in particular to a clamp rocker arm adjustment mechanism with a replaceable eccentric shaft. Background Technology

[0002] In existing technologies, clamping rocker arm mechanisms typically employ a mechanical transmission method. This involves the rotation of a shifting cam driving the rocker arm, which in turn transmits the power to the drive shaft, ultimately enabling the clamping assembly to move the bar stock. However, this mechanical transmission structure has a significant problem: long-term operation inevitably leads to wear on the shifting cam. This wear not only causes errors in the left-right movement of the clamping mechanism but also affects the mutual swinging and coordination of the multiple clamps within the mechanism. Furthermore, as the wear on the shifting cam intensifies, the swing amplitude of the clamps gradually decreases, eventually preventing the bar stock from moving properly.

[0003] Currently, there are two main conventional solutions to this problem: one is to replace the worn caliper cam, but this method is expensive because the caliper cam is costly, making the overall replacement cost expensive; the other is to adjust the clamping mechanism, but since the clamps need to cooperate with each other, adjusting one clamp alone cannot effectively solve the problem. All clamps must be adjusted uniformly, which undoubtedly increases the difficulty and complexity of the adjustment.

[0004] In view of this, the industry urgently needs a clamping rocker arm mechanism that is both easy to adjust and cost-effective in order to overcome these shortcomings in the existing technology. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a conveniently adjustable clamp rocker arm adjustment mechanism with a replaceable eccentric shaft.

[0006] To achieve the above objectives, this utility model designs a clamp rocker arm adjustment mechanism with a replaceable eccentric shaft, comprising a clamping cam, a rocker arm, a transmission shaft, and a clamping mechanism assembly. The clamping cam is driven to engage with the rocker arm. An eccentric shaft is detachably connected to the end of the rocker arm opposite to the clamping cam. The eccentric shaft is driven to the clamping mechanism assembly via the transmission shaft. The eccentric shaft comprises a first shaft segment, a second shaft segment, and a third shaft segment arranged sequentially. The first and third shaft segments are coaxially arranged, and the second shaft segment is eccentrically positioned between the first and third shaft segments. The diameter of the first shaft segment is larger than the diameter of the second shaft segment, and the diameter of the second shaft segment is larger than the diameter of the third shaft segment. Both the first and third shaft segments are driven to the rocker arm.

[0007] To better secure the eccentric shaft, the end side of the third shaft segment is provided with a mounting plane; the rocker arm is provided with a fixing member, the side of which abuts against the mounting plane.

[0008] To facilitate installation and disassembly, the rocker arm is provided with a first screw hole, through which the fixing component can be detachably installed on the rocker arm.

[0009] To enhance the stability of the rocker arm, the rocker arm is provided with an assembly hole and an expansion joint; the expansion joint communicates with the assembly hole and extends to the outer side of the rocker arm, dividing the end of the rocker arm into a first part and a second part; the rocker arm is also provided with a second screw hole that passes through the first part and the second part; the first part is provided with a bolt that passes through the second screw hole and is connected to the second part.

[0010] The clamp rocker arm adjustment mechanism with a replaceable eccentric shaft designed in this invention effectively solves the problem of wear on the clamping cam caused by long-term use. When the clamping cam wears, only the eccentric shaft needs to be replaced or adjusted to precisely fine-tune the stroke of the clamping mechanism assembly without replacing the entire cam assembly. This design not only significantly reduces maintenance costs but also substantially reduces the debugging time of the clamping mechanism assembly, thereby saving valuable production time. Furthermore, since errors can be compensated for by adjusting the eccentric shaft, this invention reduces the precision requirements for the clamping cam's machining, thus reducing the manufacturing cost of the clamping cam. Attached Figure Description

[0011] Figure 1 This is an overall plan view provided in the embodiments of this application;

[0012] Figure 2 yes Figure 1 Enlarged view of point C in the middle;

[0013] Figure 3 This is a schematic diagram of an expansion joint provided in an embodiment of this application;

[0014] Figure 4 This is a schematic diagram of the rocker arm being connected to the drive shaft via an eccentric shaft in an embodiment of this application;

[0015] Figure 5 This is a schematic diagram of the eccentric shaft provided in the embodiments of this application.

[0016] The components include: a clamping cam 10, a rocker arm 20, a first part 20a, a second part 20b, a fixing part 21, a first screw hole 22, an assembly hole 23, an expansion joint 24, a second screw hole 25, a drive shaft 30, a clamping mechanism assembly 40, a clamp 41, an eccentric shaft 50, a first shaft section 51, a second shaft section 52, a third shaft section 53, and a bolt 60. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0018] Example 1.

[0019] like Figure 1-5 As shown in the figure, the clamp rocker arm adjustment mechanism with a replaceable eccentric shaft described in this embodiment includes a shifting cam 10, a rocker arm 20, a drive shaft 30, and a clamping mechanism assembly 40. The shifting cam 10 is driven to the rocker arm 20. An eccentric shaft 50 is detachably connected to one end of the rocker arm 20 away from the shifting cam 10. The eccentric shaft 50 is driven to the clamping mechanism assembly 40 via the drive shaft 30. The eccentric shaft 50 includes a first shaft segment 51, a second shaft segment 52, and a third shaft segment 53 arranged in sequence. The first shaft segment 51 and the third shaft segment 53 are coaxially arranged, and the second shaft segment 52 is eccentrically arranged between the first shaft segment 51 and the third shaft segment 53. The diameter of the first shaft segment 51 is larger than the diameter of the second shaft segment 52, and the diameter of the second shaft segment 52 is larger than the diameter of the third shaft segment 53. Both the first shaft segment 51 and the third shaft segment 53 are driven to the rocker arm 20.

[0020] In specific implementation, refer to Figure 1 As shown, when the shifting cam 10 rotates, its power is transmitted sequentially through the rocker arm 20 and the eccentric shaft 50, and finally to the transmission shaft 30. The swing of the transmission shaft 30 drives multiple clamps 41 in the clamping mechanism assembly 40 to achieve precise clamping and movement of the bar stock, meeting the actual production needs.

[0021] Specifically, the rotation center of the rocker arm 20 is defined as point A, and the distance from point A to the central axis of the second shaft segment 52 on the eccentric shaft 50 is defined as AB. When the clamping cam 10 wears down due to long-term use, causing errors in the movement of the clamp 41, the length of AB can be adjusted by replacing the eccentric shaft 50. The eccentric shaft 50 consists of three shaft segments with decreasing diameters (first shaft segment 51, second shaft segment 52, and third shaft segment 53). The second shaft segment 52 is eccentrically positioned, meaning its central axis is not collinear with the central axes of the adjacent first shaft segment 51 and third shaft segment 53. By replacing the eccentric shaft 50 with different configurations, the position of the central axis of the second shaft segment 52 relative to the central axes of the first shaft segment 51 and third shaft segment 53 can be changed, thereby changing the length of AB. This, in turn, changes the swing amplitude of the transmission shaft 30, thereby compensating for the displacement of the clamp 41 in the clamping mechanism assembly 40. In addition, since one end of the eccentric shaft 50 is thinner (equivalent to the first shaft segment 51), it provides clear directionality for installation, ensuring the correctness and convenience of installation.

[0022] In this embodiment, as Figure 2-5As shown, to better secure the eccentric shaft 50, the end side of the third shaft segment 53 is provided with a mounting surface 531; the rocker arm 20 is provided with a fixing member 21, the side of which abuts against the mounting surface 531. The mounting surface 531 provides a clear reference surface, allowing the fixing member 21 to precisely abut against the mounting surface 531 after being fixed in a predetermined position, thereby ensuring the possibility of deflection after the eccentric shaft 50 is correctly installed.

[0023] Specifically, such as Figure 2 and Figure 4 As shown, for easy installation and disassembly, the rocker arm 20 is provided with a first screw hole 22, and the fixing member 21 is detachably installed on the rocker arm 20 through the first screw hole 22. In this way, when the eccentric shaft 50 needs to be replaced, it can be easily removed through the screw hole 22, which is simple and convenient.

[0024] In this embodiment, as Figure 2 , Figure 3 and Figure 4 As shown, in order to enhance the stability of the rocker arm 20, the rocker arm 20 is provided with an assembly hole 23 and an expansion joint 24; the expansion joint 24 communicates with the assembly hole 23 and extends to the outer side of the rocker arm 20, dividing the end of the rocker arm 20 into a first part 20a and a second part 20b; the rocker arm 20 is also provided with a second screw hole 25 that passes through the first part 20a and the second part 20b; the first part 20a is provided with a bolt 60 that passes through the second screw hole 25 and is connected to the second part 20b.

[0025] With this structural design, when installing the eccentric shaft 50, the mounting hole 23 provides a clear mounting position for the eccentric shaft 50. After the eccentric shaft 50 is installed in place, the bolt 60 is installed through the second screw hole 25 that passes through the first part 20a and the second part 20b. As the bolt 60 is tightened, the first part 20a and the second part 20b move closer to each other. This action effectively reduces the gap of the expansion joint 24, thereby clamping the eccentric shaft 50 located in the mounting hole 23 to prevent the eccentric shaft 50 from sliding or falling off on the rocker arm 20, thus ensuring the stability and reliability of the mechanism during operation.

[0026] The clamp rocker arm adjustment mechanism with a replaceable eccentric shaft provided in this embodiment effectively solves the problem of wear on the clamping cam caused by long-term use. When the clamping cam wears, only the eccentric shaft needs to be replaced or adjusted to precisely fine-tune the stroke of the clamping mechanism assembly without replacing the entire cam assembly. This design not only significantly reduces maintenance costs but also significantly reduces the debugging time of the clamping mechanism assembly, thereby saving valuable production time. Furthermore, since errors can be compensated for by adjusting the eccentric shaft, this invention reduces the precision requirements for the clamping cam's machining, thereby reducing the manufacturing cost of the clamping cam.

[0027] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A clamp rocker adjustment mechanism having a replaceable eccentric shaft, comprising a clamp cam, a rocker, a drive shaft and a clamp mechanism assembly, characterized by, The shift wrench cam is in transmission cooperation with a rocker arm, one end of the rocker arm away from the shift wrench cam is detachably connected with an eccentric shaft, the eccentric shaft is in transmission connection with the clamp wrench mechanism assembly through the transmission shaft; the eccentric shaft comprises sequentially arranged first shaft section, second shaft section and third shaft section; the first shaft section and the third shaft section are coaxially arranged, the second shaft section is eccentrically arranged between the first shaft section and the third shaft section; the diameter of the first shaft section is larger than that of the second shaft section, and the diameter of the second shaft section is larger than that of the third shaft section; the first shaft section and the third shaft section are in transmission connection with the rocker arm.

2. The clamp rocker bar adjustment mechanism with replaceable eccentric shaft according to claim 1, characterized in that, The end side of the third shaft section is provided with an assembly plane; the rocker arm is provided with a fixing piece, and the side surface of the fixing piece is in abutment with the assembly plane.

3. The clamp rocker bar adjustment mechanism with replaceable eccentric shaft according to claim 2, characterized in that, The rocker arm is provided with a first screw hole, and the fixing piece is detachably installed on the rocker arm through the first screw hole.

4. The clamp rocker arm adjustment mechanism with replaceable eccentric shaft according to claim 1 or 2 or 3, characterized in that, The rocker arm is provided with an assembly hole and an expansion joint; the expansion joint is in communication with the assembly hole and extends to the outer side surface of the rocker arm, and divides the end part of the rocker arm into a first part and a second part; the rocker arm is further provided with a second screw hole penetrating through the first part and the second part; the first part is provided with a bolt penetrating through the second screw hole and connected with the second part.

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