Tool clamp for drilling bearing hole in cylinder seat of oil cylinder

Abstract

The utility model provides a work fixture for drilling a bearing hole in a cylinder seat of an oil cylinder, and belongs to the technical field of fixtures. The problem that the clamping efficiency is low is solved. A mounting cavity is formed in the front side of the connecting seat, the connecting seat is provided with a positioning groove formed from the front side of the connecting seat to the inner wall of the lower side of the mounting cavity, an inverted-U-shaped driving block is arranged in the mounting cavity, the connecting seat is in threaded connection with a driving rod in the vertical direction, and the lower end of the driving rod is fixed to the driving block in the vertical direction. The two feet of the driving block are connected with pressing blocks respectively, the two pressing blocks are hinged to the connecting base respectively, and the driving block moves downwards to drive the two pressing blocks to swing downwards around respective hinge points at the same time. The device has the advantages of high clamping efficiency, automatic deviation correction and the like.

Description

Technical Field

[0001] This utility model belongs to the field of fixture technology and relates to a tooling fixture for drilling bearing holes in the cylinder seat of a hydraulic cylinder. Background Technology

[0002] Hydraulic cylinders are one of the most commonly used drive components, widely applied in various fields. The cylinder seat is a component of the hydraulic cylinder, responsible for the inflow and outflow of hydraulic oil within the cylinder. In practice, the shape of the cylinder seat varies depending on the application. For example... Figure 5 The cylinder base 7 shown includes a block-shaped base 7a. A circular neck 7b protrudes from the center of the bottom of the base 7a. Two plate-shaped protrusions 7c protrude from the upper side of the base 7a. The two plate-shaped protrusions 7c are parallel and their side walls are flush. Each of the two plate-shaped protrusions 7c is provided with a bearing hole 7d. The bearing holes 7d on the two plate-shaped protrusions 7c are concentric and the same size. The base 7a is provided with an oil passage. The bearing hole 7d, as the name suggests, is used for mounting bearings.

[0003] In practice, the two bearing holes 7d are machined separately on the two plate-like protrusions 7c of the cylinder seat 7 after the cylinder seat 7 has been machined. Machining the bearing holes 7d requires a machine tool and a fixture to clamp and fix the cylinder seat 7. Currently, the most common clamping method is to manually tighten multiple locking bolts on the fixture. While this provides a relatively secure clamping, the operation of multiple locking bolts results in low clamping efficiency. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a tooling fixture for drilling bearing holes in the cylinder seat of a hydraulic cylinder, which solves the problem of low clamping efficiency.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A tooling fixture for drilling bearing holes in the cylinder seat of a hydraulic cylinder includes a connecting seat with a mounting cavity on its front side. The connecting seat has a positioning groove extending from its front side to the lower inner wall of the mounting cavity. The mounting cavity is characterized by having an inverted U-shaped drive block inside. The connecting seat is threaded with a drive rod in the vertical direction. The lower end of the drive rod is fixed to the drive block in the vertical direction. Two clamping blocks are respectively connected to the two legs of the drive block. The two clamping blocks are respectively hinged to the connecting seat. When the drive block moves downward, it can simultaneously drive the two clamping blocks to swing downward around their respective hinge points.

[0007] In use, the connecting seat is fixedly connected to the front end of the machine tool spindle using fasteners. Then, the operator slides the cylinder seat into the mounting cavity by allowing its bottom circular neck to slide into the positioning groove. During installation, it's important to ensure that the two plate-shaped protrusions of the cylinder seat are aligned in the front-to-back direction. In practice, the width of the positioning groove in the left-to-right direction is the same as the outer diameter of the circular neck at the bottom of the cylinder seat. Therefore, the positioning groove allows for the positioning of the cylinder seat in the left-to-right direction within the mounting cavity. After the cylinder seat is installed in the mounting cavity, the two plate-shaped protrusions will be positioned between the two clamping blocks. Then, the operator rotates the drive rod, which moves downwards along the thread, thereby moving the drive block downwards. Because the drive block is inverted U-shaped, each of its two legs is connected to a clamping block, which is hinged to the connecting seat. Therefore, when the drive block moves downwards, it simultaneously causes the two clamping blocks to swing downwards around their respective hinge points. This results in one clamping block pressing against the left side of the two plate-like protrusions on the cylinder seat, while the other clamping block presses against the right side of the two plate-like protrusions on the cylinder seat. This securely fixes the cylinder seat within the mounting cavity.

[0008] By installing an inverted U-shaped drive block within the mounting cavity, with clamping blocks connected to its two legs, and each clamping block hinged to a connecting seat, the drive block moves downwards, causing the two clamping blocks to swing downwards simultaneously. This causes the two clamping blocks to press against both sides of the cylinder seat, fixing it within the mounting cavity and significantly improving clamping efficiency. Furthermore, during clamping, if there is a slight circumferential deviation in the position of the two plate-like protrusions on the cylinder seat, the simultaneous movement of the two clamping blocks will correct this deviation circumferentially, eliminating the need for manual adjustment. This further ensures improved clamping efficiency and maintains machining accuracy.

[0009] In the aforementioned tooling fixture for drilling bearing holes in the cylinder seat of a hydraulic cylinder, both clamping blocks are elongated in the front-to-back direction. The left and right sides of the connecting seat are respectively provided with connecting grooves that communicate with the mounting cavity. The opposite sides of the two clamping blocks are respectively provided with protrusions. The two protrusions are located in the two connecting grooves respectively. The clamping blocks and the connecting seat are hinged by pins passing through the protrusions.

[0010] There is a certain distance between the two plate-shaped protrusions on the cylinder seat. By setting the two clamping blocks into long strips along the front-back direction, it can be ensured that each clamping block can simultaneously press against the sides of the two plate-shaped protrusions on the cylinder seat. With both plate-shaped protrusions under force, the clamping firmness can be well guaranteed, and at the same time, it can also prevent the cylinder seat from tilting during the machining process.

[0011] Connecting grooves communicating with the mounting cavity are provided on the left and right sides of the connecting seat. Protrusions are provided on the opposite sides of the two clamping blocks. The two protrusions are located in the two connecting grooves respectively. The clamping blocks and the connecting seat are hinged by pins passing through the protrusions, which ensures that the long clamping blocks in the front-back direction can be hinged with the connecting seat.

[0012] In the aforementioned tooling fixture for drilling bearing holes in the cylinder seat of a hydraulic cylinder, the connecting groove is elongated in the vertical direction, and the protrusion is located at the upper part of the connecting groove.

[0013] The connecting groove is set in a long strip shape along the vertical direction, so that chips can be discharged outward during the processing.

[0014] In the aforementioned tooling fixture for drilling bearing holes in the cylinder seat of a hydraulic cylinder, the two legs of the drive block are respectively fixedly connected with guide pins in the front-rear direction, and both clamping blocks are provided with guide holes in the front-rear direction. The guide holes are oblong holes, and the guide pins pass through the guide holes. When the drive block moves in the vertical direction, the guide pins move along the guide holes.

[0015] The drive block and the two clamping blocks are connected by two guide pins passing through corresponding guide holes. Thus, when the drive block moves vertically, it causes the two clamping blocks to swing simultaneously. By setting the guide holes as oblong holes, the guide pins move along the guide holes when the drive block moves vertically, which ensures that the drive block and the clamping blocks will not jam, thus guaranteeing the reliability of the structure.

[0016] In the aforementioned tooling fixture for drilling bearing holes in the cylinder seat of a hydraulic cylinder, the two clamping blocks are respectively provided with grooves on opposite sides, and the grooves are connected to the guide holes of the clamping blocks. The two feet of the drive block are respectively located in the two grooves.

[0017] In the aforementioned tooling fixture for drilling bearing holes in the cylinder seat of a hydraulic cylinder, the connecting seat includes a chassis and a seat body fixedly connected to the front side of the chassis. The seat body is square-shaped, the mounting cavity is the inner cavity of the seat body, two connecting grooves are provided on the left and right sides of the seat body, and the drive rod is threadedly connected to the seat body.

[0018] The mounting cavity is the inner cavity of the base body. Two connecting slots are located on the left and right sides of the base body, and the drive rod is threaded onto the base body. In other words, the entire clamping mechanism is located on the base body and is connected to the chassis. The chassis is only fixed to the front end of the machine tool spindle with fasteners. Thus, when different sizes of cylinder seats are required, simply remove the original base body from the chassis and replace it with a corresponding base body that integrates the same clamping mechanism.

[0019] In the aforementioned tooling fixture for drilling bearing holes in the cylinder seat of a hydraulic cylinder, the top of the drive block is provided with a slot along the front-to-back direction. The slot is an inverted T-shaped slot, and the lower end of the drive rod is provided with a snap-fit ​​connector that is snapped into the wider portion of the slot.

[0020] The slot is an inverted T-shaped slot. The drive rod's locking connector is locked in the locking connector within the wider part of the slot. This not only does not restrict the rotation of the drive rod, but also allows the drive rod and the drive block to be fixed together axially.

[0021] Compared with the existing technology, the tooling fixture for drilling bearing holes in the cylinder seat of this hydraulic cylinder has an inverted U-shaped drive block set in the mounting cavity. The two legs of the drive block are respectively connected to clamping blocks, and the two clamping blocks are respectively hinged to the connecting seat. When the drive block moves downward, it will drive the two clamping blocks to swing downward at the same time. In this way, the two clamping blocks will press against both sides of the cylinder seat at the same time, thus fixing the cylinder seat in the mounting cavity, thereby greatly improving the clamping efficiency.

[0022] Furthermore, during the clamping process, if there is a slight deviation in the circumferential position of the two plate-shaped protrusions on the cylinder seat, the simultaneous movement of the two clamping blocks will correct the deviation of the cylinder seat in the circumferential direction. This eliminates the need for manual adjustment by the operator, thus ensuring improved clamping efficiency and machining accuracy. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the tooling fixture used for drilling bearing holes in the cylinder seat of this hydraulic cylinder.

[0024] Figure 2 This is a three-dimensional sectional view of the tooling fixture used for drilling bearing holes in the cylinder seat of this hydraulic cylinder.

[0025] Figure 3 This is a partial exploded view of the drive block and the clamping block.

[0026] Figure 4 This is a schematic diagram of the tooling fixture used for drilling bearing holes in the cylinder seat of this hydraulic cylinder after the cylinder seat has been clamped.

[0027] Figure 5 This is a three-dimensional schematic diagram of the cylinder base.

[0028] In the diagram, 1 is the connecting seat; 1a is the mounting cavity; 1b is the positioning groove; 1c is the connecting groove; 1d is the chassis; 1e is the seat body; 2 is the drive block; 2a is the slot; 3 is the drive rod; 3a is the snap-fit ​​connector; 4 is the clamping block; 4a is the protrusion; 4b is the guide hole; 4c is the groove; 5 is the pin; 6 is the guide pin; 7 is the cylinder seat; 7a is the base; 7b is the circular neck; 7c is the plate-shaped protrusion; 7d is the bearing hole. Detailed Implementation

[0029] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, a tooling fixture for drilling bearing holes in the cylinder seat of a hydraulic cylinder includes a connecting seat 1 with a mounting cavity 1a on its front side. The connecting seat 1 has a positioning groove 1b extending from its front side to the lower inner wall of the mounting cavity 1a. An inverted U-shaped drive block 2 is provided inside the mounting cavity 1a. A drive rod 3 is threadedly connected to the connecting seat 1 in the vertical direction. The lower end of the drive rod 3 is fixed to the drive block 2 in the vertical direction. Specifically, the top of the drive block 2 has a slot 2a in the front-rear direction, which is an inverted T-shaped slot. The lower end of the drive rod 3 has a retaining connector 3a that fits into the wider portion of the slot 2a. The retaining connector 3a is circular, thus ensuring that the rotation of the drive rod 3 is not affected while simultaneously fixing the drive rod 3 to the drive block 2 axially. Two clamping blocks 4 are connected to the two legs of the drive block 2, and the two clamping blocks 4 are hinged to the connecting seat 1. Moving the drive block 2 downwards simultaneously causes the two clamping blocks 4 to swing downwards around their respective hinge points.

[0031] In use, the connecting seat 1 is fixedly connected to the front end of the machine tool spindle using fasteners. Then, the operator inserts the cylinder seat 7 into the mounting cavity 1a by sliding its bottom circular neck 7b into the positioning groove 1b. During insertion, it is important to ensure that the two plate-shaped protrusions 7c of the cylinder seat 7 are aligned in the front-to-back direction. In practice, the width of the positioning groove 1b in the left-to-right direction is the same as the outer diameter of the circular neck 7b at the bottom of the cylinder seat 7. Therefore, the positioning groove 1b can be used to position the cylinder seat 7 in the left-to-right direction within the mounting cavity 1a. After the cylinder seat 7 is inserted into the mounting cavity 1a, the two plate-shaped protrusions 7c of the cylinder seat 7 will be positioned between the two clamping blocks 4. Then, the operator rotates the drive rod 3, which moves downwards along the thread, thereby causing the drive block 2 to move downwards. Because the drive block 2 is inverted U-shaped, and each of its two legs is connected to a clamping block 4, with the two clamping blocks 4 hinged to the connecting seat 1, when the drive block 2 moves downward, it simultaneously causes the two clamping blocks 4 to swing downward around their respective hinge points. This results in one clamping block 4 pressing against the left side of the two plate-shaped protrusions 7c of the cylinder seat 7, while the other clamping block 4 presses against the right side of the two plate-shaped protrusions 7c of the cylinder seat 7. Thus, the cylinder seat 7 is firmly fixed within the mounting cavity 1a, as shown in the clamped state. Figure 4 As shown.

[0032] Among them, such as Figure 1 , Figure 2 and Figure 3As shown, both clamping blocks 4 are elongated strips along the front-to-back direction. This elongated shape ensures that the clamping blocks 4 can simultaneously press against the sides of the two plate-shaped protrusions 7c of the cylinder seat 7. The left and right sides of the connecting seat 1 are respectively provided with connecting grooves 1c communicating with the mounting cavity 1a. On the opposite sides of the two clamping blocks 4, protrusions 4a are respectively provided, with the two protrusions 4a located within the two connecting grooves 1c. The clamping blocks 4 and the connecting seat 1 are hinged by pins 5 passing through the protrusions 4a. The connecting grooves 1c are elongated strips along the vertical direction, with the protrusions 4a located at the upper part of the connecting grooves 1c. By setting the connecting grooves 1c to be elongated strips along the vertical direction, chips can be discharged outwards during processing. The two legs of the drive block 2 are fixedly connected to guide pins 6 in the front-to-back direction. Both clamping blocks 4 have guide holes 4b in the front-to-back direction. The guide holes 4b are oblong, and the guide pins 6 pass through them. When the drive block 2 moves vertically, the guide pins 6 move along the guide holes 4b. The drive block 2 and the two clamping blocks 4 are connected by the guide pins 6 passing through the corresponding guide holes 4b. Therefore, when the drive block 2 moves vertically, it causes the two clamping blocks 4 to swing simultaneously. By making the guide holes 4b oblong, the movement of the guide pins 6 along the guide holes 4b when the drive block 2 moves vertically ensures that the drive block 2 and the clamping blocks 4 will not jam, guaranteeing the reliability of the structure. Each of the two clamping blocks 4 has a groove 4c on its opposite side. The groove 4c communicates with the guide hole 4b of its respective clamping block 4, and the two legs of the drive block 2 are located within the two grooves 4c.

[0033] In this embodiment, as Figure 1 and Figure 2 As shown, the connecting seat 1 includes a chassis 1d and a seat body 1e fixedly connected to the front side of the chassis 1d. The chassis 1d is circular, and the seat body 1e is rectangular. The mounting cavity 1a is the inner cavity of the seat body 1e. Two connecting grooves 1c are located on the left and right sides of the seat body 1e, and the drive rod 3 is threadedly connected to the seat body 1e. The mounting cavity 1a is the inner cavity of the seat body 1e, and the two connecting grooves 1c are located on the left and right sides of the seat body 1e, and the drive rod 3 is threadedly connected to the seat body 1e. This means that the entire clamping mechanism is located on the seat body 1e, parallel to and connected to the chassis 1d. The chassis 1d is only fixedly connected to the front end of the machine tool spindle with fasteners. Therefore, when different sizes of cylinder seats 7 are required, it is only necessary to remove the original seat body 1e from the chassis 1d and replace it with a corresponding seat body 1e integrating the same clamping mechanism.

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A tool clamp for drilling bearing holes in a cylinder seat of a cylinder, comprising a connecting seat (1) provided with a mounting cavity (1a) on the front side, said connecting seat (1) being provided with a positioning groove (1b) from the front side to the inner wall of the lower side of the mounting cavity (1a), characterized in that, The mounting cavity (1a) is internally provided with a reverse U-shaped driving block (2), the connecting seat (1) is threadedly connected with a driving rod (3) in the vertical direction, the lower end of the driving rod (3) is fixed with the driving block (2) in the vertical direction, two feet of the driving block (2) are respectively connected with two pressing blocks (4), the two pressing blocks (4) are respectively hinged with the connecting seat (1), and the downward movement of the driving block (2) can simultaneously drive the two pressing blocks (4) to swing downward around the respective hinge points.

2. The tooling fixture of claim 1, wherein, The two pressing blocks (4) are both long strips in the front-rear direction, the left and right sides of the connecting seat (1) are respectively provided with connecting grooves (1c) in communication with the mounting cavity (1a), the sides opposite to each other of the two pressing blocks (4) are respectively provided with protrusions (4a), the two protrusions (4a) are respectively located in the two connecting grooves (1c), and the pressing blocks (4) are hinged with the connecting seat (1) through the pin shafts (5) penetrating through the protrusions (4a).

3. The tooling fixture of claim 2, wherein, The connecting grooves (1c) are long strips in the vertical direction, and the protrusions (4a) are located at the upper positions of the connecting grooves (1c).

4. A tooling fixture for drilling bearing holes in a cylinder base of a cylinder according to claim 2 or 3, characterized in that The two feet of the driving block (2) are respectively fixedly connected with guide pins (6) in the front-rear direction, the two pressing blocks (4) are both provided with guide holes (4b) in the front-rear direction, the guide holes (4b) are waist-shaped holes, the guide pins (6) penetrate through the guide holes (4b), and the guide pins (6) move along the guide holes (4b) when the driving block (2) moves in the vertical direction.

5. The tooling fixture of claim 4, wherein, The sides opposite to each other of the two pressing blocks (4) are respectively provided with recesses (4c), the recesses (4c) are in communication with the guide holes (4b) of the pressing blocks (4), and the two feet of the driving block (2) are respectively located in the two recesses (4c).

6. A tooling fixture for drilling bearing holes in a cylinder base of a cylinder according to claim 2 or 3, characterized in that The connecting seat (1) comprises a bottom disc (1d) and a seat body (1e) fixedly connected to the front side of the bottom disc (1d), the seat body (1e) is a square box, the mounting cavity (1a) is an inner cavity of the seat body (1e), and the two connecting grooves (1c) are arranged on the left and right sides of the seat body (1e) and the driving rod (3) is threadedly connected on the seat body (1e).

7. The tooling fixture of claim 1 wherein, The top of the driving block (2) is provided with a clamping groove (2a) in the front-rear direction, the clamping groove (2a) is a reverse T-shaped groove, and the lower end of the driving rod (3) is provided with a clamping joint (3a) clamped in the wider part of the clamping groove (2a).

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