Pneumatic drilling clamp for driven gear of odometer

Abstract

The utility model discloses a pneumatic drilling clamp for a driven gear of an odometer, which solves the problem that the coaxiality consistency of a machined counter bore and the gear is poor due to the fact that a traditional clamping mode does not have a positioning reference, and specifically comprises a support body, a V-shaped clamping seat horizontally arranged on the support body and a driving unit. The positioning tip is vertically arranged on the bracket body; a V-shaped opening of the V-shaped clamping seat faces the driving unit and is used for abutting against the right side of the outer circle of the driven gear of the odometer to be clamped. The driving end of the driving unit faces the V-shaped opening of the V-shaped clamping seat and is used for pushing the left side of the outer circle of the driven gear of the odometer to be clamped under the action of driving force; the positioning center is arranged between the V-shaped clamping seat and the driving unit, the top of the positioning center is lower than the driving end of the driving unit and a V-shaped opening of the V-shaped clamping seat, and the positioning center is used for being matched with a center hole in one end of the to-be-clamped odometer driven gear so as to upwards abut against the to-be-clamped odometer driven gear.

Description

Technical Field

[0001] This utility model relates to the driven gear of an odometer, specifically to a pneumatic drilling fixture for the driven gear of an odometer. Background Technology

[0002] The odometer driven gear is an important component in the gearbox. When machining the odometer driven gear, it is usually necessary to machine a countersunk hole on one end face. When machining this countersunk hole, the odometer driven gear needs to be radially clamped to ensure precise machining.

[0003] Chinese invention patent CN110605590A discloses a special fixture for drilling fork-type parts. The fixture consists of a cylinder, push rod, ball head screw, hexagonal thin nut, clamping head, spring washer, bolt I, pressure plate, support plate, bushing, replaceable drill bushing, screw, pin I, flat washer, nut, fixed positioning pin, positioning bushing, fixture body, L-shaped connecting plate, pin II, bolt II, bolt III, ordinary flat key, chamfered pin, and workpiece. Its principle is to improve processing efficiency by using the positioning principle of "one side and two holes" of the workpiece and quickly clamping and positioning it with a cylinder.

[0004] However, the driven gear of the odometer only has a hole at one end before machining. Therefore, in traditional technology, the gear is usually clamped by clamping the outer circle of the gear with three jaws. Since this clamping method does not have a positioning reference, the coaxiality of the machined countersunk hole and the gear itself is often poor. Utility Model Content

[0005] To address the technical problem that traditional clamping methods often result in poor coaxiality between the machined countersunk hole and the gear itself due to the lack of a positioning reference, this utility model provides a pneumatic drilling fixture for the driven gear of an odometer.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A pneumatic drilling fixture for the driven gear of an odometer is characterized by comprising a support body, a V-shaped clamp horizontally mounted on the support body, a drive unit, and a positioning tip vertically mounted on the support body.

[0008] The V-shaped opening of the V-shaped clamp faces the drive unit and is used to abut against the right side of the outer circle of the driven gear of the odometer to be clamped.

[0009] The driving end of the driving unit faces the V-shaped opening of the V-shaped clamp, and is used to push the left side of the outer circle of the passive gear of the odometer to be clamped under the action of driving force.

[0010] The positioning tip is positioned between the V-shaped clamp and the drive unit, with its top lower than the drive end of the drive unit and the V-shaped opening of the V-shaped clamp. It is used to engage with the center hole at one end of the driven gear of the odometer to be clamped, so as to press the driven gear of the odometer to be clamped upward.

[0011] Furthermore, the V-shaped clamp includes a connecting plate and a V-shaped clamp that are both horizontally arranged;

[0012] The connecting plate is connected to the bracket body;

[0013] The V-shaped opening end of the V-shaped chuck faces the driving end of the driving unit, and the other end is connected to the connecting plate.

[0014] Furthermore, the drive unit is a cylinder;

[0015] The cylinder body is horizontally mounted on the support body along the axial direction via an L-shaped bracket, with its piston facing the V-shaped opening of the V-shaped clamp.

[0016] Furthermore, it also includes a piston support mounted on the support body and located between the cylinder and the V-shaped clamp;

[0017] The piston support is provided with a support through hole;

[0018] The piston is inserted through the through hole of the bracket in the middle and is fitted with the through hole of the bracket with a clearance.

[0019] Furthermore, the through hole of the bracket is a stepped hole, including a small hole near the V-shaped clamp and a large hole near the cylinder;

[0020] The piston includes a movable push rod and a piston body;

[0021] The movable push rod passes through the through hole of the bracket and is clearance-fitted with the through hole of the bracket. One end of the push rod is used to push the left side of the outer circle of the driven gear of the odometer to be clamped, and the other end is provided with a circular limiting plate perpendicular to its axis. The limiting plate is located in the large hole, and its outer diameter is between the diameter of the small hole and the diameter of the large hole.

[0022] One end of the piston body is movably connected to the cylinder body, and the other end is used to push the limiting plate to move within the large hole.

[0023] Furthermore, a spring is fitted around the movable push rod;

[0024] One end of the spring contacts the stepped surface of the stepped hole, and the other end contacts the limiting plate.

[0025] Furthermore, the support body includes a base plate, a first vertical plate and a second vertical plate respectively vertically and oppositely disposed on the base plate;

[0026] The first vertical plate is located to the right of the second vertical plate, and a first horizontal plate is provided on the left side of the first vertical plate; the V-shaped clamp is installed on the first horizontal plate;

[0027] A second horizontal plate is provided on the right side of the second vertical plate, and a third horizontal plate is provided on its left side; the piston bracket is installed on the second horizontal plate; the L-shaped bracket is installed on the third horizontal plate;

[0028] The positioning tip is located between the first vertical plate and the second vertical plate.

[0029] Furthermore, the positioning tip includes a connecting screw, a positioning seat, and a tip arranged coaxially from bottom to top;

[0030] The outer diameters of the connecting screw and the center point are both smaller than the outer diameter of the positioning seat;

[0031] The connecting screw is used for threaded connection with the base plate;

[0032] The tip of the tip is cone-shaped.

[0033] Furthermore, the edge of the base plate is provided with multiple mounting notches;

[0034] Each of the aforementioned mounting notches contains bolts for securing the entire pneumatic drilling fixture.

[0035] The beneficial effects of this utility model are:

[0036] 1. This utility model provides a pneumatic drilling fixture for the driven gear of an odometer. The driven gear of the odometer to be clamped is installed with a V-shaped clamp and a positioning center as the clamping reference. The gear is clamped by a drive unit, which can achieve precise machining and improve the coaxiality consistency between the machined countersunk hole and the gear itself. It has been proven that the coaxiality can be improved to 0.1mm.

[0037] 2. The pneumatic drilling fixture for the driven gear of an odometer provided by this utility model has unified design and processing benchmarks, which improves processing quality and realizes rapid automatic clamping and loosening, making it suitable for batch processing of the drilling process of the driven gear of an odometer. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of an embodiment of a pneumatic drilling fixture for a driven gear in an odometer according to the present invention.

[0039] Figure 2 This is a schematic diagram of the structure of the support body in an embodiment of this utility model;

[0040] Figure 3 This is a schematic diagram of the V-shaped clamp in an embodiment of the present invention;

[0041] Figure 4This is a schematic diagram of the piston support structure in an embodiment of this utility model;

[0042] Figure 5 This is a schematic diagram of the structure of the movable push rod and the limiting plate in an embodiment of this utility model;

[0043] Figure 6 This is a schematic diagram of the structure for positioning the top point in an embodiment of this utility model.

[0044] Icon labels:

[0045] 1-Bracket body, 11-Base plate, 12-First vertical plate, 13-Second vertical plate, 14-First horizontal plate, 15-Second horizontal plate, 16-Third horizontal plate, 17-Bolt, 2-V-type clamp, 21-Connecting plate, 22-V-type chuck, 3-Positioning center, 31-Connecting screw, 32-Positioning seat, 33-Center, 4-Driven gear of the odometer to be clamped, 5-Cylinder, 51-Piston, 511-Modible push rod, 512-Piston body, 513-Limiting plate, 514-Spring, 52-Cylinder body, 6-L-type bracket, 7-Piston bracket, 71-Bracket through hole, 711-Small hole, 712-Large hole. Detailed Implementation

[0046] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0047] This utility model provides a pneumatic drilling fixture for the driven gear of an odometer, such as... Figure 1 As shown, it includes a support body 1, a V-shaped clamp 2 horizontally arranged on the support body 1, a drive unit and a piston bracket 7, and a positioning tip 3 vertically arranged on the support body 1.

[0048] like Figure 2 As shown, the support body 1 includes a base plate 11, a first vertical plate 12 and a second vertical plate 13 respectively vertically and oppositely arranged on the base plate 11; the first vertical plate 12 is located to the right of the second vertical plate 13, and a first horizontal plate 14 is provided to the left of the first vertical plate 12; a second horizontal plate 15 is provided to the right of the second vertical plate 13, and a third horizontal plate 16 is provided to its left.

[0049] Combination Figure 1 and Figure 3As shown, the V-shaped clamp 2 is used to abut against the right side of the outer circle of the driven gear 4 of the odometer to be clamped; the V-shaped clamp 2 includes a connecting plate 21 and a V-shaped chuck 22 that are both horizontally arranged; the connecting plate 21 is connected in parallel with the first horizontal plate 14; the V-shaped opening end of the V-shaped chuck 22 faces the driving end of the driving unit, and the other end is connected to the connecting plate 21.

[0050] Combination Figure 1 and Figure 4 As shown, the piston bracket 7 is located between the cylinder 5 and the V-shaped clamp 2 and is mounted on the second horizontal plate 15; the piston bracket 7 is provided with a bracket through hole 71; the bracket through hole 71 is a stepped hole, including a small hole 711 near the V-shaped clamp 2 and a large hole 712 near the cylinder 5.

[0051] Combination Figure 1 , Figure 4 and Figure 5 As shown, the driving end of the driving unit faces the V-shaped opening of the V-shaped clamp 2, and is used to push the left side of the outer circle of the passive gear 4 of the odometer to be clamped under the action of driving force; in this embodiment, the driving unit is preferably a cylinder 5; the cylinder body 52 of the cylinder 5 is axially and horizontally mounted on the third horizontal plate 16 through the L-shaped bracket 6, and its piston 51 faces the V-shaped opening of the V-shaped clamp 2. The piston 51 includes a movable push rod 511 and a piston body 512. The movable push rod 511 passes through the through hole 71 of the bracket and is clearance-fitted with the through hole 71. One end of the rod is used to push the left side of the outer circle of the driven gear 4 of the odometer to be clamped, and the other end is provided with a circular limiting plate 513 perpendicular to its axis. The straightness of the movable push rod 511 is 0.02mm. The limiting plate 513 is located in the large hole 712, and its outer diameter is between the diameter of the small hole 711 and the diameter of the large hole 712, so that the limiting plate 513 is always located in the large hole 712. One end of the piston body 512 is movably connected to the cylinder 52, and the other end is used to push the limiting plate 513 to move within the large hole 712. A spring 514 is fitted around the movable push rod 511. One end of the spring 514 contacts the stepped surface of the stepped hole, and the other end contacts the limiting plate 513. To ensure the stability of the clamping force, the cylinder 5 outputs the clamping force linearly.

[0052] Combination Figure 1 and Figure 6 As shown, the positioning tip 3 is positioned between the V-shaped clamp 2 and the drive unit. Its top is lower than the drive end of the drive unit and the V-shaped opening of the V-shaped clamp 2, and is used to engage with the center hole at one end of the driven gear 4 of the odometer to be clamped, thereby pushing the driven gear 4 upwards. Specifically, the positioning tip 3 is located between the first vertical plate 12 and the second vertical plate 13. The positioning tip 3 includes a connecting screw 31, a positioning seat 32, and a tip 33, arranged coaxially from bottom to top. The outer diameters of both the connecting screw 31 and the tip 33 are smaller than the outer diameter of the positioning seat 32. The connecting screw 31 is used for threaded connection with the base plate 11. The top of the tip 33 is conical.

[0053] Working principle: Before machining, place the driven gear 4 of the odometer to be clamped on the positioning center 3. Start the pneumatic switch, and the cylinder 5 pushes the movable push rod 511 and spring 514, clamping the outer diameter of the driven gear 4 of the odometer to be clamped by the V-clamp 22. After machining, turn off the pneumatic switch, the piston body 512 of the cylinder 5 retracts, and the compression force of the spring 514 resets the movable push rod 511, completing the machining. Repeat the above actions to complete the drilling process.

[0054] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A pneumatic drilling fixture for the driven gear of an odometer, characterized in that: It includes a support body (1), a V-shaped clamp (2) horizontally arranged on the support body (1), a drive unit, and a positioning tip (3) vertically arranged on the support body (1); The V-shaped opening of the V-shaped clamp (2) faces the drive unit and is used to abut against the right side of the outer circle of the driven gear (4) of the odometer to be clamped. The driving end of the driving unit faces the V-shaped opening of the V-shaped clamp (2) and is used to push the left side of the outer circle of the driven gear (4) of the odometer to be clamped under the action of driving force. The positioning tip (3) is set between the V-shaped clamp (2) and the drive unit. Its top is lower than the drive end of the drive unit and the V-shaped opening of the V-shaped clamp (2). It is used to cooperate with the center hole at one end of the driven gear (4) of the odometer to be clamped, so as to press the driven gear (4) of the odometer to be clamped upward.

2. The pneumatic drilling fixture for the driven gear of an odometer according to claim 1, characterized in that: The V-shaped clamp (2) includes a connecting plate (21) and a V-shaped clamp (22) that are both horizontally arranged; The connecting plate (21) is connected to the bracket body (1); The V-shaped opening end of the V-shaped chuck (22) faces the driving end of the driving unit, and the other end is connected to the connecting plate (21).

3. The pneumatic drilling fixture for the driven gear of an odometer according to claim 1 or 2, characterized in that: The drive unit is a cylinder (5); The cylinder body (52) of the cylinder (5) is horizontally mounted on the bracket body (1) along the axis via an L-shaped bracket (6), and its piston (51) faces the V-shaped opening of the V-shaped clamp (2).

4. The pneumatic drilling fixture for the driven gear of an odometer according to claim 3, characterized in that: It also includes a piston bracket (7) disposed on the bracket body (1) and located between the cylinder (5) and the V-shaped clamp (2); The piston support (7) is provided with a support through hole (71); The piston (51) is inserted through the support through hole (71) in the middle and is clearance-fitted with the support through hole.

5. The pneumatic drilling fixture for the driven gear of an odometer according to claim 4, characterized in that: The through hole (71) of the bracket is a stepped hole, including a small hole (711) near the V-shaped clamp (2) and a large hole (712) near the cylinder (5); The piston (51) includes a movable push rod (511) and a piston body (512); The movable push rod (511) passes through the through hole (71) of the bracket and is clearance-fitted with the through hole (71). One end of the push rod is used to push the left side of the outer circle of the driven gear (4) of the odometer to be clamped, and the other end is provided with a circular limiting plate (513) perpendicular to its axis. The limiting plate (513) is located in the large hole (712), and its outer diameter is between the diameter of the small hole (711) and the diameter of the large hole (712). One end of the piston body (512) is movably connected to the cylinder (52), and the other end is used to push the limiting plate (513) to move within the large hole (712).

6. The pneumatic drilling fixture for the driven gear of an odometer according to claim 5, characterized in that: The movable push rod (511) is fitted with a spring (514); One end of the spring (514) contacts the stepped surface of the stepped hole, and the other end contacts the limiting plate (513).

7. The pneumatic drilling fixture for the driven gear of an odometer according to claim 6, characterized in that: The support body (1) includes a base plate (11), a first vertical plate (12) and a second vertical plate (13) respectively arranged vertically and oppositely on the base plate (11); The first vertical plate (12) is located to the right of the second vertical plate (13), and a first horizontal plate (14) is provided on the left side of the first vertical plate (12); the V-shaped clamp (2) is installed on the first horizontal plate (14); The second vertical plate (13) has a second horizontal plate (15) on its right side and a third horizontal plate (16) on its left side; the piston bracket (7) is installed on the second horizontal plate (15); the L-shaped bracket (6) is installed on the third horizontal plate (16); The positioning tip (3) is located between the first vertical plate (12) and the second vertical plate (13).

8. The pneumatic drilling fixture for the driven gear of an odometer according to claim 7, characterized in that: The positioning tip (3) includes a connecting screw (31), a positioning seat (32) and a tip (33) arranged coaxially from bottom to top; The outer diameters of the connecting screw (31) and the tip (33) are both smaller than the outer diameter of the positioning seat (32); The connecting screw (31) is used for threaded connection with the base plate (11); The top of the tip (33) is conical.

9. The pneumatic drilling fixture for the driven gear of an odometer according to claim 7, characterized in that: The edge of the base plate (11) is provided with multiple mounting notches; Each of the aforementioned mounting notches is provided with bolts (17) for securing the entire pneumatic drilling fixture.

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