Pendulum bob locking mechanism and impact testing machine

Abstract

The utility model provides a locking mechanism of a pendulum bob and an impact testing machine, the pendulum bob is provided with a swing limit position, and the locking mechanism comprises a base, a supporting seat group and a limiting structure; the supporting seat set comprises a first supporting seat and a second supporting seat, the first supporting seat and the second supporting seat are arranged on the base in a spaced mode, and the second supporting seat is obliquely arranged relative to the first supporting seat and used for being arranged at the swing limit position; the limiting structure comprises a limiting rod and a matching face which are matched with each other, the limiting rod and the matching face are arranged on the first supporting base and the second supporting base respectively, and one end of the limiting rod can rotate relative to the first supporting base so that the other end of the limiting rod can be gradually close to or away from the matching face. And the pendulum bob is locked or released in the locking mechanism. The locking mechanism solves the technical problems that a traditional locking mechanism is complex in structure, low in corresponding speed and high in installation accuracy requirement.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of performance evaluation of material, especially a locking mechanism of pendulum and impact testing machine. BACKGROUND

[0002] The pendulum impact testing machine is used for evaluating the toughness of material, that is, the ability of material to absorb energy before breaking. During operation, the pendulum swings from a specific swing limit position and impacts the test piece, so it is necessary to ensure that the pendulum is accurately positioned at the swing limit position for each test, which requires the use of a locking mechanism for accurate locking and release. However, the existing locking mechanisms (such as: Chinese invention patent with publication number CN119064190B and the name of an electrically driven small energy impact testing machine) generally have the disadvantages of complex structure, slow response speed and high installation precision requirement, resulting in high maintenance cost, low efficiency, high error risk and high operation complexity of the mechanism. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model provides a locking mechanism of pendulum and impact testing machine to solve the technical problems of complex structure, slow response speed and high installation precision requirement of the traditional locking mechanism in related technologies.

[0004] The utility model provides a locking mechanism of pendulum, the pendulum has swing limit position, the locking mechanism includes:

[0005] A base;

[0006] A support seat group, including a first support seat and a second support seat, the first support seat and the second support seat are spaced apart on the base, and the second support seat is inclined relative to the first support seat and is configured at the swing limit position;

[0007] A limiting structure, including a limiting rod and a matching surface, the limiting rod and the matching surface are respectively arranged on the first support seat and the second support seat, and one end of the limiting rod can rotate relative to the first support seat, so that the other end gradually approaches or gradually moves away from the matching surface, for locking or releasing the pendulum located therebetween.

[0008] Further, the end of the limiting rod close to the first support seat is defined as the first end, and the other end is defined as the second end, the first end of the limiting rod protrudes outward to form a protruding block, and the protruding block is rotatably arranged on the first support seat.

[0009] Further, the first support seat is provided with a notch for avoiding the protruding block.

[0010] Further, a first end of the limiting rod is rotationally provided with a connecting rod, the connecting rod is driven by a cylinder provided on the base, and the limiting rod is rotationally connected through the connecting rod.

[0011] Further, a second end of the limiting rod is provided with an elastic pad; and / or

[0012] A second end of the limiting rod is movably provided with a bolt for insertion or removal of the second support base.

[0013] Further, the second support base is provided with a insertion hole matched with the bolt and arranged close to the matching surface.

[0014] Further, the matching surface is a plane or an arc surface; and / or

[0015] The second support base is provided with an inclined guide surface, and a high end of the guide surface extends towards the matching surface.

[0016] Further, the second support base is provided with a stop surface, the stop surface is perpendicular to the matching surface, and the stop surface is arranged close to the first support base.

[0017] The utility model also provides an impact testing machine, including above-mentioned locking mechanism.

[0018] Compared with the prior art, the utility model has the beneficial effects that: the first support base and the second support base are arranged at intervals, and the second support base is arranged obliquely relative to the first support base, for matching the swing limit position of the pendulum, so that the pendulum can be placed at the second support base when swinging to the limit position, and the first support base can be kept away from the swing limit position, avoiding interference with the swing of the pendulum; in addition, one end of the limiting rod is rotationally connected with the first support base, so that the other end can gradually approach or gradually move away from the matching surface of the second support base, thereby quickly locking or releasing the pendulum located therebetween, simplifying the structure and making the overall locking mechanism faster. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the locking mechanism in an embodiment of the utility model;

[0020] Figure 2 It is a structure schematic view of the locking mechanism in an embodiment of the utility model, omitting the base;

[0021] Figure 3 It is a structure schematic view of the limiting rod and the connecting rod in an embodiment of the utility model;

[0022] Figure 4 It is a structure schematic view of the second support base in an embodiment of the utility model.

[0023] Brief Description of Drawings

[0024] 1, base; 2, first support seat; 201, notch; 3, second support seat; 301, matching surface; 302, guide surface; 303, stop surface; 304, insertion hole; 4, limiting rod; 401, protruding block; 5, connecting rod; 6, air cylinder; 7, elastic pad; 8, bolt.

[0025] The realization, functional features and advantages of the utility model will be further explained in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0026] In order to make the utility model's purpose, technical scheme and beneficial effects more clear and obvious, the technical scheme in the utility model will be further explained below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0027] In the utility model embodiment, as shown in the figure, Figures 1-4 The locking mechanism of the pendulum includes a base 1, a support seat group and a limiting structure. The support seat group includes a first support seat 2 and a second support seat 3. The first support seat 2 and the second support seat 3 are arranged at intervals on the base 1. The second support seat 3 is arranged obliquely relative to the first support seat 2 and is configured to be located at the swing limit position. The limiting structure includes a limiting rod 4 and a matching surface 301. The limiting rod 4 and the matching surface 301 are arranged on the first support seat 2 and the second support seat 3 respectively. One end of the limiting rod 4 can rotate relative to the first support seat 2 so that the other end gradually approaches or gradually moves away from the matching surface 301. The limiting rod 4 is used to lock or release the pendulum located therebetween.

[0028] Specifically, in the utility model embodiment, the pendulum is driven by a forward-reverse motor so that it can swing clockwise and counterclockwise around the axis to impact the test piece during the swing. The swing path of the pendulum has two swing limit positions (a first swing limit position and a second swing limit position). Since the pendulum has a notch 201, the notch 201 needs to face the test piece during the impact. Therefore, the swing limit position away from the notch 201 is the first swing limit position, i.e., the initial position of the pendulum. The other swing limit position is the second swing limit position. Since the pendulum needs to be corrected to the first swing limit position for each test, the locking mechanism in the embodiment needs to be arranged at the first swing limit position.

[0029] In the embodiment of the utility model, support seat group includes first support seat 2 and second support seat 3, first support seat 2 and second support seat 3 are spaced apart, so that first support seat 2 is away from first swing limit position, and second support seat 3 is placed in first swing limit position, facilitating normal swing of pendulum, avoiding swing interference to it;Meanwhile, second support seat 3 is inclinedly arranged relative to first support seat 2, for adapting to first swing limit position, further avoiding interference to pendulum.

[0030] In the embodiment of the utility model, limit structure limiting rod 4 and cooperation face 301, one end of limiting rod 4 is rotatably arranged in first support seat 2, so that the other end can gradually approach or gradually move away from cooperation face 301 located in second support seat 3;In this way, when pendulum swings to first swing limit position, it is parked at cooperation face 301, and limiting rod 4 is driven to rotate under the action of external force, so that pendulum can be pressed at cooperation face 301, to realize the quick locking of pendulum.In this process, various components do not need too much mechanical cooperation and linkage action, so that the corresponding speed of limiting rod 4 is faster, so as to quickly lock pendulum.In addition, the mechanical structure is simplified to reduce maintenance cost, and the failure rate is lower, and the assembly precision requirement is lower.

[0031] The embodiment positions limiting rod 4 and cooperation face 301 by first support seat 2 and second support seat 3, so that pendulum between limiting rod 4 can be locked or released after being driven to rotate by external force, the locking mechanism is simplified, the corresponding speed is faster, and the requirement for installation precision is reduced.

[0032] As shown in Figure 2 , Figure 3 In an embodiment, the one end of the limiting rod 4 close to the first support seat 2 is defined as the first end, and the other end is the second end, the first end of the limiting rod 4 protrudes outward to form a protrusion 401, and the protrusion 401 is rotatably arranged on the first support seat 2. Specifically, in order to make the limiting rod 4 rotatably connected to the first support seat 2, the embodiment defines the limiting rod 4 to include the first end and the second end, the first end of the limiting rod 4 is integrally formed with the protrusion 401, the protrusion 401 is provided with a rotating shaft hole, and the rotating shaft is arranged in the rotating shaft hole to rotatably cooperate with the first support seat 2, so that the first end of the limiting rod 4 can rotate around the axis of the rotating shaft, and the second end of the limiting rod 4 is rotatable in the direction of approaching or moving away from the cooperation face 301. In addition, since the second support seat 3 is inclinedly arranged, in order to ensure that the second end of the limiting rod 4 rotates in place, as shown in Figure 3 , the protrusion 401 protrudes outward from the side of the limiting rod 4. Preferably, the first support seat 2 is provided with a notch 201 for avoiding the protrusion 401.

[0033] As shown in Figure 2 , Figure 3As shown in the embodiment, the first end of the limiting rod 4 is rotatably provided with a connecting rod 5, which is driven by a cylinder 6 provided on the base 1, and is used to rotate the limiting rod 4 through the connecting rod 5. Specifically, in order to drive the limiting rod 4 to rotate, the embodiment is hinged with a connecting rod 5 at the first end of the limiting rod 4, and the connecting rod 5 is connected with the cylinder 6. Thus, the cylinder 6 is fixed on the base 1, and the cylinder 6 can push or pull the connecting rod 5 to move, and the limiting rod 4 can be rotated under the cooperation of the protrusion 401 and the first support seat 2. At this time, the cylinder 6 as a driving member is directly connected to the limiting rod 4 through the connecting rod 5, and the cooperation of the gear and rack set in the traditional mechanism is omitted, so that the corresponding speed of each component can be improved.

[0034] As shown in the embodiment, Figure 2 , Figure 3 In an embodiment, the second end of the limiting rod 4 is provided with an elastic pad 7. Specifically, the elastic pad 7 can compensate for small errors that may occur during manufacturing and installation to a certain extent, and can adapt to the imperfectly matched contact surface through its own deformation to ensure that the limiting rod 4 and the cooperating surface 301 have more close and stable contact, thereby improving the accuracy of the locking position. When locking and releasing operations are performed, especially when the limiting rod 4 quickly approaches or leaves the pendulum, the direct collision between metals will produce a lot of noise, and the elastic pad 7 can effectively reduce such noise. In addition, since the elastic pad 7 can buffer the direct impact between mechanical components and reduce the degree of wear, it helps to prolong the service life of the related components and reduce the maintenance cost and time consumption caused by frequent replacement of parts.

[0035] In addition, as shown in the embodiment, Figure 2 , Figure 3 The second end of the limiting rod 4 is movably provided with a latch 8 for inserting or removing the second support seat 3. Specifically, in order to further lock the pendulum between the limiting rod 4 and the cooperating surface 301, the embodiment is provided with a latch 8 at the limiting rod 4, and the telescopic latch 8 can facilitate the insertion or removal of the second support seat 3 on the one hand, and can also avoid interference of the latch 8 with the pendulum. Preferably, the second support seat 3 is provided with a insertion hole 304, which cooperates with the latch 8 and is arranged close to the cooperating surface 301. Of course, in other embodiments, since the locking part of the pendulum is a rod-shaped structure, in order to increase the contact area with the locking part and firmly fix the pendulum at the corresponding position, the surface of the limiting rod 4 can be provided as an arc-shaped structure matched with the above rod-shaped structure.

[0036] As shown in the embodiment, Figure 4As shown in the embodiment, the matching surface 301 is a flat surface or an arc surface. Specifically, when the matching surface 301 is a flat surface, the contact uniformity can be improved and the surface can be protected from damage, and the adaptability can be improved. Conversely, when the matching surface 301 is an arc surface, the arc structure of the limiting rod 4 described above can be matched, and a cavity can be formed therebetween for fitting and accommodating the pendulum.

[0037] In addition, as Figure 4 As shown in the embodiment, the second support base 3 is provided with an inclined guide surface 302, and the high end of the guide surface 302 extends in the direction of the matching surface 301. Specifically, in order to avoid the pendulum directly impacting the second support base 3 and facilitate the pendulum to be placed at the matching surface 301, the embodiment is provided with a guide surface 302 at the second support base 3, and the guide surface 302 is arranged in an inclined manner, and the high end of the guide surface 302 is connected to the matching surface 301.

[0038] As Figure 4 As shown in the embodiment, the second support base 3 is provided with a stop surface 303, and the stop surface 303 is perpendicular to the matching surface 301 and is arranged close to the first support base 2. Specifically, in the embodiment, the matching surface 301 and the stop surface 303 are configured as an L-shaped structure, so that the stop surface 303 can block the pendulum, that is, when the pendulum abuts against the stop surface 303, the pendulum is at the first swing limit position.

[0039] The embodiment also provides an impact testing machine comprising the locking mechanism of the pendulum described above, and the specific structure of the locking mechanism is referred to the above-described embodiments. Since the impact testing machine adopts all the technical solutions of the above-described embodiments, at least all the beneficial effects brought by the technical solutions of the above-described embodiments are possessed, and here is not repeated.

[0040] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model and are not limited. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the utility model, and all should be covered in the scope of the claims of the utility model.

Claims

1. Locking mechanism for a pendulum, the pendulum having a limit of oscillation, characterized in that The locking mechanism comprises: a base; a support group comprising a first support and a second support, the first support and the second support being spaced apart on the base, and the second support being arranged obliquely relative to the first support for being configured at the swing limit position; a limiting structure comprising a limiting rod and a matching surface, the limiting rod and the matching surface being arranged on the first support and the second support respectively, and one end of the limiting rod being rotatable relative to the first support so that the other end of the limiting rod gradually approaches or gradually moves away from the matching surface for locking or releasing the pendulum located therebetween.

2. The locking mechanism of the pendulum according to claim 1, characterized in that The end of the limiting rod close to the first support is defined as a first end, and the other end is defined as a second end, the first end of the limiting rod is outwardly convex to form a convex block, and the convex block is rotatably arranged on the first support.

3. The locking mechanism of the pendulum according to claim 2, characterized in that The first support is provided with a notch for avoiding the convex block.

4. The locking mechanism of the pendulum according to claim 2, characterized in that The first end of the limiting rod is rotatably provided with a connecting rod, the connecting rod is driven by a cylinder arranged on the base, and the connecting rod is used to rotate the limiting rod through the connecting rod.

5. A locking mechanism for a pendulum according to any one of claims 2 to 4, wherein The second end of the limiting rod is provided with an elastic pad; and / or The second end of the limiting rod is movably provided with a bolt for inserting or moving out of the second support.

6. The locking mechanism of the pendulum according to claim 5, characterized in that The second support is provided with a insertion hole, the insertion hole is matched with the bolt, and is arranged close to the matching surface.

7. The locking mechanism of the pendulum according to claim 1, characterized in that, The matching surface is a plane or an arc surface; and / or The second support is provided with an inclined guide surface, and the high end of the guide surface extends in the direction of the matching surface.

8. The locking mechanism of the pendulum according to claim 7, characterized in that The second support is provided with a stop surface, the stop surface is perpendicular to the matching surface, and is arranged close to the first support.

9. An impact testing machine characterised in that, Comprise: The locking mechanism according to any one of claims 1-8.

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