Double-end rocker arm support tool

Abstract

The utility model relates to the technical field of support tooling, disclose a double -end rocker arm support tooling, including mounting bracket, the slide setting of mounting bracket has the locating plate, be provided with a plurality of corresponding locating boss of bolt mounting hole on the locating plate, be provided with two clamping blocks and be used for driving two clamping blocks clamping / loosening drive component on the mounting bracket, two clamping blocks symmetrical distribution, be provided with first clamping surface and second clamping surface on the clamping block, form first included angle between first clamping surface and second clamping surface, first included angle is obtuse angle, when using, place the support workpiece on the locating plate upside, to make locating boss and corresponding bolt mounting hole insert joint positioning. The utility model structure is simple, and the production cost is low, in the clamping process, through the first clamping surface and second clamping surface of clamping block to promote workpiece and the self -adaptation sliding of locating plate, automatic compensation initial deviation of placing, complete automatic centering and stable clamping, reduce the operation difficulty, improve the clamping efficiency.

Description

Technical Field

[0001] This utility model relates to the field of support tooling technology, and more specifically, to a double-headed rocker arm support tooling. Background Technology

[0002] Rocker arms (such as those used in bulldozers and other mechanical equipment) are crucial components in the transmission systems of mechanical equipment. Depending on the application requirements, rocker arms are classified into single-head and double-head structures. The rocker arm support is a part used to support the rocker arm shaft and the rocker arm itself, and is a commonly used component in mechanical engineering. When the rocker arm support needs inspection or maintenance, a positioning fixture is often required to prevent displacement of the support workpiece during subsequent inspection or maintenance. Existing fixtures of this type generally require the operator to first precisely pre-position the workpiece into the predetermined clamping position of the fixture before the clamping mechanism can operate.

[0003] This "precise positioning first, then rigid clamping" approach has the following drawbacks: Due to manufacturing tolerances between the workpiece and the fixture, and the difficulty in achieving absolute precision through manual placement, the initial position of the workpiece is highly susceptible to deviation. If the positioning deviates significantly, the workpiece cannot properly fit against the clamping surface of the fixture, leading to uneven clamping force and insecure clamping. This affects subsequent inspection and maintenance work, reducing work efficiency.

[0004] Therefore, there is an urgent need for a special tooling that can adaptively compensate for initial positioning deviations and achieve reliable clamping, in order to overcome the shortcomings of existing technologies. Utility Model Content

[0005] To address at least one of the aforementioned problems, this utility model provides a double-headed rocker arm support fixture suitable for positioning a support workpiece. The support workpiece has several bolt mounting holes. The double-headed rocker arm support fixture includes a mounting frame, on which a positioning plate is slidably mounted. The positioning plate has several positioning protrusions corresponding to the bolt mounting holes. The mounting frame has two clamping blocks and a driving component for clamping / releasing the two clamping blocks. The two clamping blocks are symmetrically distributed, and each clamping block has a first clamping surface and a second clamping surface. A first included angle is formed between the first clamping surface and the second clamping surface, and the first included angle is obtuse. In use, the support workpiece is placed on the upper side of the positioning plate so that the positioning protrusion is inserted and positioned with the corresponding bolt mounting hole. The driving component drives the two clamping blocks to move towards each other. The clamping blocks drive the support workpiece and the positioning plate to slide adaptively through the first clamping surface and the second clamping surface until the support workpiece is clamped between the two clamping blocks. This utility model has a simple structure and low production cost. During the clamping process, the first clamping surface and the second clamping surface of the clamping block push the workpiece and the positioning plate to slide adaptively, automatically compensating for the initial placement deviation, completing automatic centering and stable clamping, reducing the difficulty of operation and improving the clamping efficiency.

[0006] Optionally, both the first clamping surface and the second clamping surface are planar. The support workpiece includes an integrally formed base and a cylindrical section. The bolt mounting hole is opened on the base. The upper end of the positioning protrusion is provided with a guide slope to facilitate the positioning protrusion into the bolt mounting hole. When clamped, both the first clamping surface and the second clamping surface abut against the cylindrical section.

[0007] Optionally, a stress dispersion groove is provided at the connection between the first clamping surface and the second clamping surface.

[0008] Optionally, the mounting bracket is provided with a first slide rail on its upper side, and the positioning plate is provided with a first slider that slides in cooperation with the first slide rail on its lower side.

[0009] Optionally, stop blocks for stopping the first slider are respectively provided at both ends of the first slide rail.

[0010] Optionally, the driving component includes a cylinder, and a transmission mechanism is provided between the telescopic rod of the cylinder and the clamping block. The cylinder drives the two clamping blocks to clamp towards each other or release away from each other through the transmission mechanism.

[0011] Optionally, the transmission mechanism includes a drive block, a second slider, and a force-amplifying transmission rod. The drive block is connected to the telescopic rod of the cylinder, the force-amplifying transmission rod is connected between the drive block and the second slider, and the mounting bracket is provided with a second slide rail that slides in cooperation with the second slider.

[0012] Optionally, the force-amplifying transmission rod is hinged to the mounting frame. The force-amplifying transmission rod includes a first transmission rod and a second transmission rod integrally connected. A first connecting post is connected between the first transmission rod and the second slider. A first limiting groove is provided on the first transmission rod to slide with the first connecting post. A second connecting post is connected between the second transmission rod and the driving block. A second limiting groove is provided on the second transmission rod to slide with the second connecting post.

[0013] Optionally, the first transmission rod and the second transmission rod form a second included angle, the second included angle being an obtuse angle, and the ratio of the length of the first transmission rod to the length of the second transmission rod is 0.4-0.6.

[0014] Optionally, the first included angle is 100°-120°.

[0015] Compared with the prior art, the double-headed rocker arm support fixture of this utility model has a simple structure and low production cost. During the clamping process, the workpiece and the positioning plate are pushed to slide adaptively by the first clamping surface and the second clamping surface of the clamping block, which automatically compensates for the initial placement deviation, completes automatic centering and stable clamping, reduces the difficulty of operation and improves the clamping efficiency. Attached Figure Description

[0016] Figure 1 This is a perspective view of the double-headed rocker arm support tooling of this utility model;

[0017] Figure 2 for Figure 1 Enlarged view of section C;

[0018] Figure 3 This is an exploded view of the double-headed rocker arm support tooling of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the clamping block of the double-headed rocker arm support tooling of this utility model;

[0020] Figure 5 This is a schematic diagram of the force-amplifying transmission rod of the double-headed rocker arm support tooling of this utility model;

[0021] Figure 6 This is a schematic diagram of the positioning plate of the double-headed rocker arm support tooling of this utility model;

[0022] Figure 7This is a schematic diagram of the structure of the double-headed rocker arm support tooling workpiece of this utility model;

[0023] The component names corresponding to the various reference numerals in the figure are as follows: 1 is the mounting bracket, 101 is the first slide rail, 102 is the stop block, 103 is the second slide rail, 2 is the positioning plate, 201 is the positioning protrusion, 2011 is the guide slope, 202 is the first slider, 3 is the support workpiece, 301 is the bolt mounting hole, 303 is the base, 304 is the cylindrical section, 4 is the clamping block, 401 is the first clamping surface, 402 is the second clamping surface, 403 is the stress dispersion groove, 5 is the cylinder, 6 is the driving block, 7 is the second slider, 8 is the force amplification transmission rod, 81 is the first transmission rod, 811 is the first limiting slide groove, 82 is the second transmission rod, 821 is the second limiting slide groove, 91 is the first connecting column, 92 is the second connecting column, 10 is the hinge point, 11 is the connecting shaft, A is the first included angle, B is the second included angle, L is the first distance, and M is the second distance. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship when the product is in normal use.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0027] See Figures 1-7This utility model provides a double-headed rocker arm support fixture, suitable for positioning a support workpiece 3. The support workpiece 3 has a plurality of bolt mounting holes 301. The double-headed rocker arm support fixture includes a mounting frame 1, on which a positioning plate 2 is slidably mounted. The positioning plate 2 has a plurality of positioning protrusions 201 corresponding to the bolt mounting holes 301. The mounting frame 1 is provided with two clamping blocks 4 and a driving component for driving the two clamping blocks 4 to clamp / release. The two clamping blocks 4 are symmetrically distributed, and each clamping block 4 has a first clamping surface 401 and a second clamping surface 402. A first included angle A is formed between the first clamping surface 401 and the second clamping surface 402. The angle is obtuse. In use, the support workpiece 3 is placed on the upper side of the positioning plate 2 so that the positioning protrusion 201 is inserted and positioned with the corresponding bolt mounting hole 301. The two clamping blocks 4 are driven to move towards each other by the driving component. The clamping blocks 4 drive the support workpiece 3 and the positioning plate 2 to slide adaptively through the first clamping surface 401 and the second clamping surface 402 until the support workpiece 3 is clamped between the two clamping blocks 4. The present invention has a simple structure and low production cost. During the clamping process, the workpiece and the positioning plate are pushed to slide adaptively by the first clamping surface and the second clamping surface of the clamping blocks, which automatically compensates for the initial placement deviation, completes automatic centering and stable clamping, reduces the difficulty of operation, and improves the clamping efficiency.

[0028] Specifically, in this embodiment, the sliding positioning plate 2 and the symmetrical clamping block 4 with an obtuse-angled clamping surface work together to enable the clamping surface of the clamping block 4 to push the support workpiece 3 and the positioning plate 2 to slide adaptively during the clamping process, automatically compensating for the initial placement deviation and achieving precise centering and stable clamping. This not only reduces the technical requirements for operators and improves clamping efficiency, but also ensures the positioning rigidity and reliability of the support during inspection and maintenance by eliminating gaps and distributing clamping force evenly, effectively guaranteeing the accuracy and safety of subsequent work. The positioning plate 2 is fixed to the mounting bracket 1 by bolts. In this embodiment, the support workpiece 3 is a double-headed rocker arm support, which is provided with two connecting shafts 11, which are used to connect the two connecting heads of the double-headed rocker arm respectively. This support workpiece is existing technology and will not be described in detail here.

[0029] See Figures 1-4The first clamping surface 401 and the second clamping surface 402 are both planar. The support workpiece 3 includes an integrally formed base 303 and a cylindrical section 304. The bolt mounting hole 301 is opened on the base 303, and the positioning protrusion 201 is cylindrical. The upper end of the positioning protrusion 201 is provided with a guide slope 2011 to facilitate the positioning protrusion 201 into the bolt mounting hole 301, which makes the positioning operation easy. When clamped, the first clamping surface 401 and the second clamping surface 402 both abut against the cylindrical section 304. When the clamping blocks 4 move towards each other, the first clamping surface 401 and the second clamping surface 402 simultaneously contact the cylindrical surface of the cylindrical section 304. Using the component force of the slope, the cylindrical workpiece is automatically guided to move towards the center of symmetry of the two clamping blocks until the force balance is achieved, thereby realizing automatic centering. After clamping, the two clamping surfaces and the cylindrical surface form two long contact areas, which together constitute a very stable mechanical structure, effectively preventing the workpiece from shifting during subsequent inspection or maintenance.

[0030] See Figure 4 A stress dispersion groove 403 is provided at the connection between the first clamping surface 401 and the second clamping surface 402. When subjected to repeated clamping forces, the connection between the first clamping surface 401 and the second clamping surface 402 is prone to micro-cracks, which can lead to fatigue damage of the clamping block. The stress dispersion groove 403 can effectively eliminate stress concentration points and improve the durability and service life of the clamping block.

[0031] See Figures 1-3 The mounting bracket 1 is provided with a first slide rail 101 on the upper side, and the positioning plate 2 is provided with a first slider 202 that slides and engages with the first slide rail 101 on the lower side. The engagement between the slider and the slide rail provides a precise and unique direction of movement for the positioning plate and the workpiece on it. In this embodiment, the extension direction of the first slide rail 101 is perpendicular to the movement direction of the clamping block 4.

[0032] See Figure 1 and Figure 2 The first slide rail 101 is provided with stop blocks 102 at both ends for stopping the first slider 202. The stop blocks 102 provide physical hard limits for the sliding range of the first slider 202, preventing it from disengaging from the end of the slide rail due to inertia or misoperation during the sliding process, ensuring that the first slider 202 always works within the designed safe stroke, and ensuring the integrity of the tooling and operational safety.

[0033] See Figure 1 and Figure 3The driving component includes a cylinder 5. A transmission mechanism is provided between the telescopic rod of the cylinder 5 and the clamping block 4. The cylinder 5 drives the two clamping blocks 4 to clamp towards each other or release away from each other through the transmission mechanism. The single linear motion of the cylinder telescopic rod is accurately converted into the synchronous and symmetrical movement of the two clamping blocks towards or away from each other, ensuring that the clamping forces on both sides of the workpiece are always symmetrical and act simultaneously. The clamping / releasing action is achieved by driving the displacement of the two clamping blocks through one cylinder 5. The structure is simple and the production cost is low.

[0034] See Figure 1 , Figure 3 and Figure 5 The transmission mechanism includes a drive block 6, a second slider 7, and a force-amplifying transmission rod 8. The drive block 6 is connected to the telescopic rod of the cylinder 5, and the force-amplifying transmission rod 8 is connected between the drive block 6 and the second slider 7. A second slide rail 103 that slides with the second slider 7 is provided on the mounting frame 1. Through the linkage mechanism composed of the drive block and the force-amplifying transmission rod, the unidirectional thrust of the cylinder telescopic rod can be transmitted simultaneously and symmetrically to the second sliders 103 on both sides, and converted into the opposite or opposite movements of the two second sliders 103. This rigid linkage mechanism ensures the synchronicity of the movement of the two clamping blocks. The force-amplifying transmission rod 8 is hinged to the mounting frame 1, expanding... The force transmission rod 8 includes a first transmission rod 81 and a second transmission rod 82 integrally connected. A first connecting post 91 connects the first transmission rod 81 and the second slider 7. A first limiting groove 811 is provided on the first transmission rod 81 to slide with the first connecting post 91. A second connecting post 92 connects the second transmission rod 82 and the drive block 6. A second limiting groove 821 is provided on the second transmission rod 82 to slide with the second connecting post 92. The two limiting grooves provide necessary motion freedom compensation for the entire linkage mechanism. The limiting grooves allow the corresponding connecting posts to slide within the grooves, improving the smoothness and reliability of the action.

[0035] See Figure 1 , Figure 3 and Figure 5A second included angle B is formed between the first transmission rod 81 and the second transmission rod 82. The second included angle B is an obtuse angle, and the ratio of the length of the first transmission rod 81 to the length of the second transmission rod 82 is 0.4-0.6. The force-amplifying transmission rod forms a double-ended lever with its middle hinge point as the fulcrum. The force of the cylinder acts on one end of the lever through the second connecting column 92, and outputs an amplified force to the second slider 7 through the first connecting column 91 at the other end, so that a large clamping force can be achieved with a small cylinder thrust. The second included angle B is designed to be an obtuse angle. In this embodiment, the second included angle B is specifically 115°, and the ratio is set to 0.4-0.6, which is the effective force of the force-amplifying transmission rod during its working stroke. The arm ratio ensures that when the cylinder applies thrust through the drive block 6, the thrust can be more efficiently converted into the thrust of the output end of the first drive rod 81 onto the second slider 7 through the second drive rod 82, thereby generating a stable and amplified clamping force throughout the entire clamping stroke, especially in the final clamping position; in this embodiment, the ratio is set to 0.5 or close to 0.5; the force amplification drive rod 8 is hinged to the mounting bracket 1 with a hinge point 10, the length of the first drive rod 81 is the first distance L from the end of the first drive rod 81 away from the hinge point 10 to the hinge point 10, and the length of the second drive rod 82 is the second distance M from the end of the second drive rod 82 away from the hinge point 10 to the hinge point 10.

[0036] See Figure 1 and Figure 4 The first included angle A is 100°-120°. In this embodiment, the first included angle A is 110°. The angle design is moderate. If the angle is too small, although the guiding effect is stronger, it will cause the clamping surface to be too "vertical", and the horizontal component force will be insufficient, making it difficult to effectively push the workpiece and the positioning plate to slide for automatic centering. At the same time, the contact area will become smaller, which may lead to excessive local pressure and damage to the workpiece. If the angle is too large, the clamping surface will be too "flat". Although the contact area is large, the guiding and automatic centering capabilities will decrease sharply, and the horizontal component force to push the workpiece to slide will be almost lost.

[0037] The double-headed rocker arm support fixture of this utility model has a simple structure and low production cost. During the clamping process, the workpiece and the positioning plate are pushed to slide adaptively by the first clamping surface and the second clamping surface of the clamping block, which automatically compensates for the initial placement deviation, completes automatic centering and stable clamping, reduces the difficulty of operation and improves the clamping efficiency.

[0038] In the description of this disclosure, it should be understood that the terms "upper", "lower", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0039] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0041] In this disclosure, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first feature or in indirect contact with the first feature through an intermediate medium.

[0042] It should be noted that when a component is described as being "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is described as being "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A double-headed rocker arm support fixture, suitable for positioning a support workpiece (3), wherein the support workpiece (3) is provided with a plurality of bolt mounting holes (301), characterized in that, The double-headed rocker arm support fixture includes a mounting frame (1), on which a positioning plate (2) is slidably mounted. The positioning plate (2) has several positioning protrusions (201) corresponding to the bolt mounting holes (301). The mounting frame (1) has two clamping blocks (4) and a driving component for clamping / releasing the two clamping blocks (4). The two clamping blocks (4) are symmetrically distributed. Each clamping block (4) has a first clamping surface (401) and a second clamping surface (402). The first clamping surface (401) and the second clamping surface (402)... A first included angle (A) is formed between them, and the first included angle (A) is an obtuse angle. When in use, the support workpiece (3) is placed on the upper side of the positioning plate (2) so that the positioning protrusion (201) is inserted and positioned with the corresponding bolt mounting hole (301). The two clamping blocks (4) are driven to move towards each other by the driving component. The clamping blocks (4) drive the support workpiece (3) and the positioning plate (2) to slide adaptively through the first clamping surface (401) and the second clamping surface (402) until the support workpiece (3) is clamped between the two clamping blocks (4).

2. The double-headed rocker arm support fixture according to claim 1, characterized in that, The first clamping surface (401) and the second clamping surface (402) are both planes. The support workpiece (3) includes an integrally formed base (303) and a cylindrical section (304). The bolt mounting hole (301) is opened on the base (303). The upper end of the positioning protrusion (201) is provided with a guide slope (2011) to facilitate the insertion of the positioning protrusion (201) into the bolt mounting hole (301). When clamped, the first clamping surface (401) and the second clamping surface (402) abut against the cylindrical section (304).

3. The double-headed rocker arm support fixture according to claim 1, characterized in that, A stress dispersion groove (403) is provided at the connection between the first clamping surface (401) and the second clamping surface (402).

4. The double-headed rocker arm support fixture according to claim 1, characterized in that, The mounting bracket (1) is provided with a first slide rail (101) on its upper side, and the positioning plate (2) is provided with a first slider (202) that slides and cooperates with the first slide rail (101) on its lower side.

5. The double-headed rocker arm support fixture according to claim 4, characterized in that, The first slide rail (101) has stop blocks (102) at both ends for stopping the first slider (202).

6. The double-headed rocker arm support fixture according to claim 1, characterized in that, The driving component includes a cylinder (5), and a transmission mechanism is provided between the telescopic rod of the cylinder (5) and the clamping block (4). The cylinder (5) drives the two clamping blocks (4) to clamp in opposite directions / release in opposite directions through the transmission mechanism.

7. The double-headed rocker arm support fixture according to claim 6, characterized in that, The transmission mechanism includes a drive block (6), a second slider (7) and a force-amplifying transmission rod (8). The drive block (6) is connected to the telescopic rod of the cylinder (5). The force-amplifying transmission rod (8) is connected between the drive block (6) and the second slider (7). The mounting bracket (1) is provided with a second slide rail (103) that slides with the second slider (7).

8. The double-headed rocker arm support fixture according to claim 7, characterized in that, The force-amplifying transmission rod (8) is hinged to the mounting frame (1). The force-amplifying transmission rod (8) includes a first transmission rod (81) and a second transmission rod (82) integrally connected. A first connecting post (91) is connected between the first transmission rod (81) and the second slider (7). A first limiting groove (811) is provided on the first transmission rod (81) to slide with the first connecting post (91). A second connecting post (92) is connected between the second transmission rod (82) and the driving block (6). A second limiting groove (821) is provided on the second transmission rod (82) to slide with the second connecting post (92).

9. The double-headed rocker arm support fixture according to claim 8, characterized in that, The first transmission rod (81) and the second transmission rod (82) form a second included angle (B), which is an obtuse angle, and the ratio of the length of the first transmission rod (81) to the length of the second transmission rod (82) is 0.4-0.

6.

10. The double-headed rocker arm support fixture according to any one of claims 1-9, characterized in that, The first included angle (A) is 100°-120°.

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