inwardly clamping centering mechanism

Abstract

An inwardly clamping centering mechanism comprises a base, a first rotating arm rotatably connected to the base by a first rotating shaft, two second rotating arms rotatably connected to two ends of the first rotating arm by two second rotating shafts, the distance between the axis of the two second rotating shafts and the axis of the first rotating shaft being equal, two sliding arms rotatably connected to the two second rotating arms by two third rotating shafts, the distance between the axis of the two third rotating shafts and the axis of the second rotating shafts being equal, and two clamping arms rotatably connected to the two sliding arms by two fourth rotating shafts, the clamping surfaces of the two clamping arms being oppositely arranged, and the distance between the axis of the two third rotating shafts and the axis of the fourth rotating shafts being equal.

Description

Technical Field

[0001] This utility model relates to the field of machining, and in particular to an inward clamping and centering mechanism. Background Technology

[0002] In the fields of machining and automated manufacturing, reliable workpiece clamping is a crucial step in ensuring machining quality. However, traditional external clamping fixtures and unidirectional clamping methods are increasingly revealing significant limitations in practical applications. These issues not only affect production efficiency and product quality but also, to some extent, hinder the manufacturing industry's progress towards high-end and intelligent manufacturing.

[0003] Unidirectional clamping methods suffer from significant uneven force distribution. Under this method, the workpiece is subjected to clamping force in only one direction, which easily leads to workpiece misalignment during machining due to force imbalance. Especially in high-precision machining, even extremely small misalignments can severely impact the workpiece's dimensional accuracy, shape accuracy, and surface quality. In traditional machining processes, workpiece alignment often relies on operator experience and manual operation. This not only consumes a significant amount of time and effort but also makes it difficult to guarantee accurate alignment every time due to human error. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an inward clamping and centering mechanism that can firmly clamp a workpiece.

[0005] The objective of this utility model is achieved through the following solution: An inward clamping and centering mechanism, comprising: A base; A first rotating arm is rotatably connected to the base via a first rotating shaft; Two second rotating arms are rotatably connected to both ends of the first rotating arm via second rotating shafts, and the distance between the axis of the two second rotating shafts and the axis of the first rotating shaft is equal. Two sliding arms are rotatably connected to the end of the second rotating arm away from the second rotating shaft via a third rotating shaft, and the distance between the axis of the third rotating shaft on the two sliding arms and the axis of the second rotating shaft is equal. Each sliding arm is slidably disposed on the base along its length extension direction, and the two sliding arms are spaced apart on both sides of the first rotating shaft. Two clamping arms are rotatably connected to one end of the sliding arm located on the third rotating shaft via a fourth rotating shaft. The clamping surfaces of the two clamping arms are arranged opposite each other, and the distance between the axis of the third rotating shaft on the two rotatably connected sliding arms and the axis of the fourth rotating shaft is equal.

[0006] Furthermore, the clamping arm is provided with two abutting parts symmetrically distributed along the extension line of the line connecting the fourth rotating shaft and the third rotating shaft. When the inward clamping and centering mechanism clamps the product, both abutting parts abut against the side of the product.

[0007] Furthermore, a limiting plate is provided on the base, which is used to limit the sliding stroke of the clamping arm.

[0008] Furthermore, the base is also provided with a clearance space, within which the first rotating arm, the second rotating arm, and the clamping arm are movably disposed.

[0009] Furthermore, the inward clamping and centering mechanism also includes two support columns, which are located on opposite sides of the base. Each support column has a sliding groove, with one end of the sliding groove facing the clearance space. The sliding arm can slide along the sliding groove.

[0010] Furthermore, a protective cover is fixedly installed on the side of each support column away from the base, and the opening of the protective cover is set to face the other end of the sliding groove, and the end of the sliding arm away from the clamping arm can extend into the protective cover.

[0011] Furthermore, a connecting rod is provided at the end of the sliding arm away from the clamping arm, at least a portion of the connecting rod being located inside the protective cover and the end of the connecting rod away from the clamping arm extending out of the protective cover.

[0012] Furthermore, a spring is sleeved around the connecting rod, with the two ends of the spring abutting against the protective cover and the sliding arm, respectively.

[0013] Furthermore, a handle is installed at the end of the connecting rod.

[0014] Furthermore, a wear-resistant plate is also provided on the base, and the first rotating arm is rotatably mounted on the wear-resistant plate.

[0015] The advantage of this invention lies in the design of the connection and layout of the first rotating arm, the second rotating arm, and the sliding arm. This design ensures that the two sliding arms can slide synchronously in opposite directions around the first rotating shaft, thereby enabling the two clamping arms to clamp precisely inward, achieving high-precision centering and meeting the requirements of high-precision operations. The precise setting and symmetrical arrangement of the distances between each rotating shaft ensures the smoothness and stability of the movement process and reduces impact vibration. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the inward clamping and centering mechanism of this utility model.

[0018] Figure 2 for Figure 1 The diagram shows the internal structure of the inward clamping and centering mechanism.

[0019] Figure 3 for Figure 2 The top view of the inward clamping and centering mechanism shown.

[0020] Figure 4 for Figure 1 The diagram shows an inward clamping and centering mechanism clamping the product.

[0021] Figure 5 for Figure 4 The cross-sectional view shown is taken along the axis of one of its third rotating axes of the inward clamping and centering mechanism.

[0022] Figure 6 This is a schematic diagram of the support column of this utility model. Detailed Implementation

[0023] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. Based on the description of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0024] The terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are used only for the convenience of description and simplification, 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 limiting the invention.

[0025] Please refer to Figure 1- Figure 6 This utility model discloses an inward clamping and centering mechanism, comprising: A base 10 serves as the supporting foundation for the entire inward clamping and centering mechanism to ensure that it does not deform when subjected to various forces generated during the clamping process.

[0026] A first rotating arm 20 is rotatably connected to a base 10 via a first rotating shaft 21. A wear-resistant plate 12 is also provided on the base 10, and the first rotating arm 20 is rotatably mounted on the wear-resistant plate 12. During the rotation of the first rotating arm 20, the wear-resistant plate 12 bears significant pressure and friction, effectively reducing wear on the base 10 and protecting its precision and stability. Simultaneously, the wear-resistant plate 12 also provides support, enabling the first rotating arm 20 to rotate smoothly and steadily.

[0027] Two second rotating arms 30 are rotatably connected to the two ends of the first rotating arm 20 via second rotating shafts 31, and the distance between the axis of the two second rotating shafts 31 and the axis of the first rotating shaft 21 is equal.

[0028] Two sliding arms 40 are rotatably connected to the end of the second rotating arm 30 away from the second rotating shaft 31 via a third rotating shaft 41, and the axis of the third rotating shaft 42 on the two sliding arms 40 is equidistant from the axis of the second rotating shaft 31. Each sliding arm 40 is slidably disposed on the base 10 along its length extension direction, and the two sliding arms 40 are spaced apart on both sides of the first rotating shaft 21.

[0029] Two clamping arms 50 are rotatably connected to one end of the sliding arm 40 located on the third rotating shaft 42 via the fourth rotating shaft 51. The clamping surfaces of the two clamping arms 50 are arranged opposite each other, and the distance between the axis of the third rotating shaft 42 on the two rotatably connected sliding arms 40 and the axis of the fourth rotating shaft 51 is equal.

[0030] Please see Figure 1 , Figure 4 and Figure 5 In this configuration, a connecting rod 41 is provided at the end of each sliding arm 40 away from the clamping arm 50. At least a portion of the connecting rod 41 is located within the protective cover 61, while the end of the connecting rod 41 away from the clamping arm 50 extends out of the protective cover 61. The portion of the connecting rod 41 is protected within the protective cover 61, while the portion extending out of the protective cover 61 facilitates connection.

[0031] A spring 411 is sleeved around the connecting rod 41. The two ends of the spring 411 abut against the protective cover 61 and the sliding arm 40, respectively. The spring 411 provides a restoring force for the sliding arm 40. When the clamping arm 50 is subjected to external impact or the workpiece surface is uneven, causing fluctuations in clamping force, the spring 411 can elastically deform, absorbing excess energy and acting as a buffer to prevent excessive clamping force from damaging the workpiece. During normal clamping, the spring 411 provides a stable elastic force, ensuring the uniformity and stability of the clamping force. A handle 412 is installed at the end of the connecting rod 41. Preferably, the handle 412 is threaded onto the end of the connecting rod 41. The surface of the handle 412 is provided with anti-slip textures or protrusions to increase the friction between the operator's hand and the handle, preventing slippage during operation.

[0032] The clamping arm 50 has two abutment portions 52 symmetrically distributed along the extension of the line connecting the fourth rotating shaft 51 and the third rotating shaft 42. When the inward clamping centering mechanism clamps the product 100, both abutment portions 52 abut against the side of the product 100. This symmetrical distribution design allows the clamping force to be applied evenly to the product 100, avoiding deformation or damage to the product 100 caused by uneven clamping force distribution. During the clamping process, the clamping arm 50 rotates around the fourth rotating shaft 51, causing the two abutment portions 52 to move closer to the product 100 until they abut against the side of the product 100, thereby achieving clamping of the product 100. This design allows the clamping force to be evenly transmitted to the side of the product 100 through the abutment portions 52, ensuring the stability and reliability of the clamping.

[0033] Please see Figure 1 A limiting plate 11 is provided on the base 10 to limit the sliding stroke of the clamping arm 50. When it is necessary to clamp the product 100, the clamping arm 50 is pushed to slide along the second rotating arm 30. As the clamping arm 50 slides, the abutment part 52 gradually approaches the product 100. When a suitable clamping position is reached, the abutment part 52 applies a clamping force to the product 100, achieving stable clamping of the product 100. During the sliding process of the clamping arm 50, the limiting plate 11 plays a role in limiting the stroke. When the clamping arm 50 slides to the set limit position, the limiting plate 11 contacts the clamping arm 50, preventing the clamping arm 50 from continuing to slide, thereby ensuring that the clamping arm 50 operates within a safe stroke range and avoiding equipment damage or decreased clamping accuracy caused by excessive sliding.

[0034] Please see Figure 2 and Figure 3The base 10 also has a clearance space 13, within which the first rotating arm 20, the second rotating arm 30, and the clamping arm 50 are movably disposed. The first rotating arm 20 and the second rotating arm 30 are typically connected to the base 10 via a rotating shaft, enabling them to rotate within a certain angle range. The clamping arm 50 is connected to the second rotating arm 30 and, driven by the rotating arm, clamps and releases the product 100. The three components cooperate within the clearance space 13 to jointly complete the clamping task of the product 100.

[0035] Please see Figure 4 , Figure 5 and Figure 6 The inward clamping and centering mechanism also includes two support columns 60, located on opposite sides of the base 10. Each support column 60 has a sliding groove 62, with one end of the sliding groove 62 opening towards the clearance space 13. The sliding arm 40 can slide along the sliding groove 62. The two support columns 60 are symmetrically distributed on both sides of the base 10, enhancing structural stability and providing support and guidance for the sliding arm 40. The design of the sliding groove 62 provides a precise track for the movement of the sliding arm 40, ensuring that the sliding arm 40 maintains linear movement during sliding and avoiding deviation or swaying. The sliding arm 40 is connected to the clamping arm 50, and by sliding within the sliding groove 62, it drives the clamping arm 50 to perform clamping and releasing actions. A protective cover 61 is fixedly installed on the side of each support column 60 away from the base 10, with the opening of the protective cover 61 facing the other end of the sliding groove 62. The end of the sliding arm 40 away from the clamping arm 50 can extend into the protective cover 61. The protective cover 61 protects the key parts of the sliding arm 40 and the support column 60, preventing external impurities from entering and ensuring operational safety.

[0036] The inward clamping and centering mechanism provided by this utility model, through the connection and layout of the first rotating arm 20, the second rotating arm 30, and the sliding arm 40, ensures that the two sliding arms 40 can slide synchronously in opposite directions around the first rotating shaft 21, thereby enabling the two clamping arms 50 to clamp inward precisely, achieving high-precision centering and meeting the requirements of high-precision operations. The precise setting and symmetrical arrangement of the distances between each rotating shaft ensures the smoothness and stability of the movement process and reduces impact vibration.

[0037] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An inward clamping and centering mechanism, characterized in that, include: A base; A first rotating arm is rotatably connected to the base via a first rotating shaft; Two second rotating arms are rotatably connected to both ends of the first rotating arm via second rotating shafts, and the distance between the axis of the two second rotating shafts and the axis of the first rotating shaft is equal. Two sliding arms are rotatably connected to the end of the second rotating arm away from the second rotating shaft via a third rotating shaft, and the distance between the axis of the third rotating shaft on the two sliding arms and the axis of the second rotating shaft is equal. Each sliding arm is slidably disposed on the base along its length extension direction, and the two sliding arms are spaced apart on both sides of the first rotating shaft. Two clamping arms are rotatably connected to one end of the sliding arm located on the third rotating shaft via a fourth rotating shaft. The clamping surfaces of the two clamping arms are arranged opposite each other, and the distance between the axis of the third rotating shaft on the two rotatably connected sliding arms and the axis of the fourth rotating shaft is equal.

2. The inward clamping and centering mechanism according to claim 1, characterized in that, The clamping arm is provided with two abutting parts symmetrically distributed along the extension line of the line connecting the fourth rotating shaft and the third rotating shaft. When the inward clamping and centering mechanism clamps the product, both abutting parts abut against the side of the product.

3. The inward clamping and centering mechanism according to claim 1, characterized in that, A limiting plate is provided on the base, which is used to limit the sliding stroke of the clamping arm.

4. The inward clamping and centering mechanism according to claim 3, characterized in that, The base is also provided with a clearance space, within which the first rotating arm, the second rotating arm, and the clamping arm are movably disposed.

5. The inward clamping and centering mechanism according to claim 4, characterized in that, The inward clamping and centering mechanism also includes two support columns, which are located on opposite sides of the base. Each support column has a sliding groove, with one end of the sliding groove facing the clearance space. The sliding arm can slide along the sliding groove.

6. The inward clamping and centering mechanism according to claim 5, characterized in that, Each of the support columns is fixedly equipped with a protective cover on the side away from the base. The opening of the protective cover is set to face the other end of the sliding groove. The end of the sliding arm away from the clamping arm can extend into the protective cover.

7. The inward clamping and centering mechanism according to claim 6, characterized in that, The sliding arm is provided with a connecting rod at one end away from the clamping arm, and at least a portion of the connecting rod is located inside the protective cover and the end away from the clamping arm extends out of the protective cover.

8. The inward clamping and centering mechanism according to claim 7, characterized in that, A spring is sleeved around the connecting rod, and the two ends of the spring abut against the protective cover and the sliding arm, respectively.

9. The inward clamping and centering mechanism according to claim 7, characterized in that, A handle is installed at the end of the connecting rod.

10. The inward clamping and centering mechanism according to claim 1, characterized in that, The base is also provided with a wear-resistant plate, and the first rotating arm is rotatably mounted on the wear-resistant plate.

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