Motor shell end face and outer side machining clamp

Abstract

The utility model relates to the field of clamp tools, in particular to a motor shell end face and outer side machining clamp. Comprising an L-shaped supporting seat, a limiting structure and a centering structure, the L-shaped supporting seat comprises a base and a back seat which is perpendicular to the base and used for clamping a motor shell, and machining holes are formed in the back seat and comprise the top machining hole, the middle machining hole and the bottom machining hole. The limiting structure is arranged above the top machining hole and used for preventing the motor shell from toppling over. The centering structure is arranged in the middle of the back seat and comprises two centering pieces, and each centering piece comprises a centering column and a self-centering chuck arranged on the centering column and is used for being inserted into the through hole of the motor shell and centering the motor shell. A processing worker only needs to insert the two through holes of the motor shell into the two centering columns during operation; the self-centering chuck can automatically center the through hole of the motor shell so as to achieve the effect of rapidly and accurately centering and positioning the motor shell.

Description

Technical Field

[0001] This utility model relates to the field of fixtures and tooling, specifically to a fixture for machining the end face and outer side of a motor housing. Background Technology

[0002] The motor housing is a basic component of motor products. After the motor housing blank is completed, the end face and outer side face of the motor housing blank need to be milled. This requires placing the motor housing in a fixture and clamping it in place.

[0003] Chinese utility model patent CN219725876U discloses a clamp for a motor housing, comprising: a vertically placed clamp support having a through hole for placing the motor housing; and a clamp assembly disposed on the clamp support and located at the periphery of the through hole, the clamp assembly including a positioning part and a clamping part respectively disposed on both sides of the clamp support, the positioning part being used to restrict the displacement of the motor housing within the through hole, and the clamping part being used to clamp the motor housing against the positioning part.

[0004] However, this fixture still has the following shortcomings:

[0005] 1. Positioning relies on a through hole (i.e., a slot similar in shape to the overall shape of the motor housing) and three positioning pins around the through hole to position the oblong hole of the motor housing. The specific operation requires first placing the motor housing into the through hole, then continuously adjusting the position of the oblong hole until it is inserted into the positioning pins, so that the motor housing rests against the support block. This operation is relatively cumbersome, time-consuming, and the centering positioning is not very accurate.

[0006] 2. When aligning the oblong hole of the motor housing with the positioning post, the operator needs to hold the motor housing while operating. The motor housing is heavy, which requires a lot of arm strength from the operator, increasing the operator's workload. Utility Model Content

[0007] The present invention aims to provide a machining fixture for the end face and outer side of a motor housing, so as to solve the problem of inaccurate centering and positioning of the motor housing in the prior art.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a machining fixture for the end face and outer side of a motor housing, comprising an L-shaped support base, a limiting structure, and a centering structure; the L-shaped support base includes a base and a back seat perpendicular to the base for clamping the motor housing, the back seat having machining holes including a top machining hole, a middle machining hole, and a bottom machining hole; the limiting structure is located above the top machining hole to prevent the motor housing from tipping over; the centering structure is located in the middle of the back seat and includes two centering components, each including a centering column and a self-centering chuck located on the centering column, for inserting into the through hole of the motor housing and centering it.

[0009] Beneficial effects:

[0010] 1. The machining holes on the backrest allow the machine to machine the end face of the motor housing near the backrest.

[0011] 2. The limiting structure can protect the protruding edge on the top of the end face of the motor housing after it comes to the back seat, so as to prevent it from tilting outward. This eliminates the need for the processing worker to continuously hold the motor housing, and also makes it easier for the centering structure to center it.

[0012] 3. The centering columns in the centering structure can assist the machining workers in alignment. During operation, it is only necessary to insert the two through holes of the motor housing into the two centering columns. The self-centering chuck can automatically center the through holes of the motor housing, so as to achieve the function of quick and accurate centering and positioning of the motor housing.

[0013] Preferably, as an improvement, a planar thread is provided at the center of the self-centering chuck, and multiple self-centering locating pins are evenly distributed on the planar thread. The planar thread can drive the self-centering locating pins to move closer to or away from the center.

[0014] Beneficial effects: When in use, simply rotating the planar thread will cause the self-centering locating pin to extend or retract by the same length simultaneously, and its centering effect is better than directly inserting the centering pin into the through hole of the motor housing.

[0015] Preferably, as an improvement, it also includes a clamping structure, including a clamping cylinder disposed around the periphery of the back seat for clamping the side of the motor housing. The clamping cylinder includes a mounting base and a lifting member disposed on the mounting base. The mounting base is also provided with a rotating shaft seat. The end of the lifting member is rotatably provided with a clamping member, and the middle part of the clamping member is rotatably connected to the rotating shaft of the rotating shaft seat.

[0016] Beneficial effects: Compared with the commonly used lifting components that are directly connected to the pressing components, this design is a lever-type pressing cylinder, which is more stable and has a more precise pressing point.

[0017] Preferably, as an improvement, it also includes an airtight support structure disposed on the back seat, the airtight support structure being disposed inside the clamping cylinder for detecting the tightness of the motor housing; and the airtight detection structure corresponds one-to-one with the clamping cylinder.

[0018] Beneficial effects: The airtight support structure can help the processing worker judge whether the clamping cylinder has pressed the motor housing tightly. If the airtight support structure detects that there is still air leakage, it will issue an alarm to remind the processing worker to adjust the motor housing immediately until the clamping cylinder completely presses the motor housing tightly, that is, the motor housing is completely pressed against the airtight support structure.

[0019] Preferably, as an improvement, the airtight support structure includes a retaining column disposed on the back seat, and the retaining column is provided with an air passage hole.

[0020] Beneficial effects:

[0021] 1. The clamping post can assist the positioning pin in positioning the end face of the motor housing, making the positioning of the end face of the motor housing more accurate.

[0022] 2. The air passage can help the processing worker judge whether the end face of the motor housing is completely pressed against the clamping post. If air can still come out of the air passage, an alarm will be sounded to remind the processing worker to adjust the motor housing immediately until the end face of the motor housing is completely pressed against the clamping post.

[0023] Preferably, as an improvement, the limiting structure includes a limiting seat, a limiting pin that can slide axially at the bottom of the limiting seat, a limiting groove on the side of the limiting seat, a ball at the lower end of the limiting pin, an axial limiting member on the side wall of the limiting pin, the limiting groove allowing the axial limiting member to slide up and down, and a spring sleeved on the top of the limiting pin.

[0024] Beneficial effects:

[0025] 1. The limiting groove allows the limiting pin to slide up and down, while the axial limiting component on the side wall of the limiting pin restricts the movement distance of the limiting pin, which can prevent the limiting pin from retracting completely inward; it allows the limiting pin to rise up by the elasticity of the spring when the motor housing is close to the back seat, without interfering with the approach of the motor housing. After the motor housing enters, the spring can return to its original shape on its own.

[0026] 2. The ball bearing design allows the motor housing to roll on its end face when approached, eliminating the need for manual lifting of the limit pin. This also minimizes the risk of the limit pin scraping against the motor housing, thus protecting it.

[0027] 3. At the same time, this design relies solely on the deformation and restoring ability of the spring itself, the raw materials are simple and readily available, and it saves energy.

[0028] Preferably, as an improvement, it also includes a guide rod fixedly mounted on the base and perpendicular to the back seat, with a fixed seat provided under the guide rod, and the guide rod is used to support and guide the movement of the motor housing.

[0029] Beneficial effects:

[0030] 1. The guide rod assists the machining worker in centering the motor housing and saves effort. In specific operation, the machining worker only needs to place the motor housing on the guide rod and then push it inward along the guide rod so that the two through holes of the motor housing enter the centering pin and contact the ball bearings of the limit pin. Then push it inward until the limit pin completes the limit on the end face of the motor housing.

[0031] 2. Since the guide rod is cylindrical, it is not convenient to fix it directly to the base. The fixing seat under the guide rod can make the fixing effect better.

[0032] 3. Furthermore, it has the effect of raising the guide rod. Compared to directly setting the guide rod on the base, it can prevent the base from scraping against the motor housing during the process of pushing the motor housing inward.

[0033] Preferably, as an improvement, it also includes a support column disposed on the base, the support column being located on the front side of the guide rod away from the back seat.

[0034] Beneficial effects:

[0035] 1. The support column can provide better support for the motor housing and prevent the motor housing from falling downwards during the processing of the motor housing.

[0036] 2. The support column is located on the front side of the guide rod away from the back seat, which can prevent the support column from interfering with the push-in of the motor housing.

[0037] Preferably, as an improvement, the centering column is provided with an ear plate at one end near the back seat, and the ear plate is connected to the back seat.

[0038] Beneficial effects: Since the centering column is cylindrical, it is not very effective to fix it directly to the back seat. Therefore, the addition of the ear plate can make the fixation between the centering column and the back seat better and more stable.

[0039] Preferably, as an improvement, the L-shaped support base is provided with reinforcing ribs on its side.

[0040] Beneficial effects: Since the L-shaped support is relatively thin, continuous positive force applied to the back support can easily cause it to deform. Therefore, setting a reinforcing rib between the base and the back support can make the L-shaped support more robust and improve its durability. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention before the motor housing is placed on the fixture.

[0042] Figure 2 for Figure 1 An enlarged structural diagram of point A.

[0043] Figure 3 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention, with the motor housing not placed on the fixture and the cover plate of the centering component opened.

[0044] Figure 4 for Figure 3 A magnified structural diagram at point B.

[0045] Figure 5 This is a schematic diagram of the overall structure of placing the motor housing onto the fixture in Embodiment 1 of this utility model.

[0046] Figure 6 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention without the motor housing being placed on the fixture.

[0047] Figure 7 for Figure 6 A magnified structural diagram at point C.

[0048] Figure 8 This is a schematic diagram of the overall structure of placing the motor housing onto the fixture in Embodiment 2 of this utility model. Detailed Implementation

[0049] The following detailed description illustrates the specific implementation method:

[0050] The reference numerals in the accompanying drawings of the instruction manual include: 1. Base; 2. Backrest; 3. Machining hole; 4. Limiting structure; 41. Limiting groove; 42. Limiting pin; 43. Ball bearing; 5. Centering component; 51. Centering column; 52. Self-centering chuck; 521. Self-centering positioning pin; 53. Ear plate; 54. Cover plate; 6. Clamping cylinder; 61. Mounting seat; 62. Lifting component; 63. Rotary shaft seat; 64. Clamping component; 7. Airtight support structure; 71. Clamping column; 72. Air passage; 8. Guide rod; 9. Fixed seat; 10. Support column; 11. Reinforcing rib plate; 12. Tool setting reference hole.

[0051] Example 1

[0052] This embodiment specifically relates to a centering and limiting mechanism for the machining fixture on the end face and outer side of the motor housing. For example... Figures 1-5 As shown, it includes an L-shaped support base, a limiting structure 4, and a centering structure. The L-shaped support base includes a base 1 and a back seat 2 perpendicular to the base 1 for clamping the motor housing. The back seat 2 of the L-shaped support base has a top machining hole, a middle machining hole, and a bottom machining hole from top to bottom. The top machining hole includes an L-shaped machining hole and a short strip machining hole. The middle machining hole is a long strip machining hole located near the right side of the back seat 2. The bottom machining hole is a square machining hole located on the lower left side of the L-shaped machining hole, which facilitates the tool to perform machining on the end face of the motor housing near the back plate at a certain position. The upper left corner of the back seat 2 also has a tool setting reference hole 12, which is a through hole, so as to facilitate the tool to accurately position the coordinates of the fixture and improve the machining accuracy.

[0053] Above the L-shaped machining hole is a limiting structure 4 to prevent the motor housing from tipping over. The limiting structure 4 is bolted to the back seat 2. The limiting structure 4 includes a limiting seat, with an axially sliding limiting pin 42 at the bottom of the limiting seat. A limiting groove 41 is provided on the side of the limiting seat, and a ball bearing 43 is provided at the lower end of the limiting pin 42. An axial limiting component is provided on the side wall of the limiting pin 42. In this embodiment, the axial limiting component is a screw. When the screw is tightened onto the limiting pin 42, the axial limiting component extends into the limiting groove 41, which allows the axial limiting component to slide up and down. A spring is sleeved on the top of the limiting pin 42. In its natural state, as... Figure 2 As shown, the axial limiting component is located at the bottom end of the limiting groove 41. When the limiting pin 42 is pressed upward by the motor housing product, the axial limiting component can slide upward to the top of the limiting groove 41, thereby limiting the limiting pin 42 to its extreme position of upward retraction. Two centering components 5 are respectively provided below the L-shaped machining hole and below the short strip machining hole. The centering component 5 includes a centering column 51 and a self-centering chuck 52 set on the centering column 51. An ear plate 53 is provided at the end of the centering column 51 near the back seat 2. The centering column 51 is fixed to the back seat 2 by the ear plate 53. The specific fixing method can be bolt fixing. The self-centering chuck 52 can be a hydraulic chuck or a pneumatic chuck. A planar thread is provided at the center of the self-centering chuck 52, and multiple self-centering locating pins 521 are evenly distributed on the planar thread. The self-centering chuck 52 of the left-hand centering component 5 is a three-jaw chuck with three self-centering locating pins 521, while the self-centering chuck 52 of the right-hand centering component 5 is a two-jaw chuck with two self-centering locating pins 521. The planar thread can move the self-centering locating pins 521 closer to or further away from the center. A cover plate 54 is fixed to the self-centering chuck 52 with screws. This machining fixture is also equipped with a controller and a power supply, and the power supply, controller, and self-centering chuck 52 are electrically connected.

[0054] The specific operating procedure is as follows: The worker lifts the motor housing and aligns the two through holes of the motor housing with the two centering pins 51. Force is applied until the edge of the motor housing's end face touches the ball bearing 43 of the limiting pin 42. The ball bearing 43 of the limiting pin 42 rolls along the raised edge of the motor housing's end face, causing the limiting pin 42 to rise. After the raised edge of the motor housing enters the inside of the limiting pin 42, the limiting pin 42 returns to its original position by a spring, thus limiting the raised edge of the motor housing's end face and preventing the motor housing from tilting outwards towards the worker. At this point, the power switch is turned on, causing the planar thread to rotate, causing multiple self-centering positioning pins 521 to extend outwards synchronously by the same length until they press against the through holes of the motor housing, achieving precise centering and positioning.

[0055] Example 2

[0056] The difference between this embodiment and Embodiment 1 is that this embodiment adds a clamping mechanism and an airtight support structure 7, and also adds other components on top of the L-shaped support base, such as... Figures 6-8As shown. Both sides of the L-shaped support base are bolted with reinforcing ribs 11. Two guide rods 8, spaced apart, parallel, and of the same height, are fixedly installed on the base 1. The guide rods 8 are perpendicular to the back seat 2. A fixing seat 9 for fixing the guide rods 8 is welded and fixed to the bottom of the guide rods 8, and the fixing seat 9 is bolted to the base 1. Support columns 10 are also spaced apart on the base 1. The two support columns 10 are located outside the two guide rods 8 and on the front side of the guide rods 8 away from the back seat 2. This arrangement will not interfere with the advancement of the motor housing. Furthermore, the support columns 10 are made of a material with good support but not rigidity, such as ABS, which can minimize wear on the motor housing. A clamping structure is used to press the protruding edge of the motor housing end face. Three clamping cylinders 6 are bolted and distributed at the three corners of the back seat 2. The system includes a mounting base 61 and a lifting component 62 mounted on the mounting base 61. The lifting component 62 can be driven by a hydraulic cylinder, pneumatic cylinder, or other driving components. A rotating shaft seat 63 is also provided on the mounting base 61. A clamping component 64 is rotatably mounted at the end of the lifting component 62, and the middle part of the clamping component 64 is rotatably connected to the rotating shaft of the rotating shaft seat 63. Three airtight support structures 7 are bolted to the inner sides of the three clamping structures 6. Each airtight support structure 7 includes a clamping column 71 mounted on the backrest 2, and the clamping column 71 has a through-hole 72 communicating with an air pipe. The clamping cylinder 6 is electrically connected to the power supply and controller of Embodiment 1.

[0057] The specific operating procedure is as follows:

[0058] The worker lifts the motor housing and places it on the two guide rods 8. Then, the worker pushes the motor housing inward toward the back seat 2. After the motor housing completes its self-centering and anti-tipping positioning of the end face, the clamping cylinder 6 starts to work. The lifting component 62 begins to rise, and the end of the clamping component 64 near the lifting component 62 rises accordingly. The middle part of the clamping component 64 rotates along the shaft, causing the other end of the clamping component 64 to descend and press against the end face of the motor housing. The three clamping cylinders 6 press against three points on the end face of the motor housing to press the end face of the motor housing against the clamping post 71. If airflow continues to flow from the air passage 72 of the airtight support structure 7, the end face of the motor housing is not fully pressed against the retaining post 91. The airtight detection structure will issue an alarm, reminding the processing worker to adjust the motor housing to be fully pressed against the retaining post 91. If the airflow cannot flow out, the alarm will be deactivated. Specifically, a pressure gauge can be installed on the air pipe connected to the air passage 72. The pressure gauge is electrically connected to the controller and the alarm. In this embodiment, the controller is a PLC or a microcontroller, specifically a PLC. The alarm is an alarm light or a buzzer alarm. After receiving the pressure value signal from the pressure gauge, the controller controls the alarm to start.

[0059] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A jig for machining the end face and outer side of a motor housing, characterized in that: The device includes an L-shaped support, a limiting structure (4), and a centering structure. The L-shaped support includes a base (1) and a back seat (2) perpendicular to the base (1) for clamping the motor housing. The back seat (2) has machining holes (3), including a top machining hole, a middle machining hole, and a bottom machining hole. The limiting structure (4) is located above the top machining hole to prevent the motor housing from tipping over. The centering structure is located in the middle of the back seat (2) and includes two centering components (5). The centering component (5) includes a centering column (51) and a self-centering chuck (52) located on the centering column (51) for inserting into the through hole of the motor housing and centering it.

2. The machining fixture for the end face and outer side of the motor housing according to claim 1, characterized in that: The self-centering chuck (52) has a planar thread at its center, and multiple self-centering locating pins (521) are evenly distributed on the planar thread. The planar thread can drive the self-centering locating pins (521) to move closer to or away from the center.

3. The machining fixture for the end face and outer side of the motor housing according to claim 1, characterized in that: It also includes a clamping structure, including a clamping cylinder (6) disposed around the periphery of the back seat (2) for clamping the side of the motor housing. The clamping cylinder (6) includes a mounting base (61) and a lifting member (62) disposed on the mounting base (61). A rotating shaft seat (63) is also disposed on the mounting base (61). A clamping member (64) is rotatably disposed at the end of the lifting member (62). The middle part of the clamping member (64) is rotatably connected to the rotating shaft of the rotating shaft seat (63).

4. The machining fixture for the end face and outer side of the motor housing according to claim 3, characterized in that: It also includes an airtight support structure (7) set on the back seat (2), the airtight support structure (7) is set inside the clamping cylinder (6) and is used to detect the clamping condition of the motor housing; and the airtight support structure (7) is set in a one-to-one correspondence with the clamping cylinder (6).

5. The machining fixture for the end face and outer side of the motor housing according to claim 4, characterized in that: The airtight support structure (7) includes a retaining column (71) disposed on the back seat (2), and the retaining column (71) is provided with an air passage hole (72).

6. The machining fixture for the end face and outer side of the motor housing according to claim 1, characterized in that: The limiting structure (4) includes a limiting seat, a limiting pin (42) that can slide axially is provided at the bottom of the limiting seat, a limiting groove (41) is provided on the side of the limiting seat, a ball (43) is provided at the lower end of the limiting pin (42); an axial limiting member is provided on the side wall of the limiting pin (42), and the limiting groove (41) allows the axial limiting member to slide up and down; a spring is sleeved on the top of the limiting pin (42).

7. The machining fixture for the end face and outer side of the motor housing according to claim 1, characterized in that: It also includes a guide rod (8) fixedly mounted on the base (1) and perpendicular to the back seat (2), with a fixed seat (9) provided under the guide rod (8), and the guide rod (8) is used to support and guide the movement of the motor housing.

8. The machining fixture for the end face and outer side of the motor housing according to claim 7, characterized in that: It also includes a support column (10) disposed on the base (1), the support column (10) being located on the front side of the guide rod (8) away from the back seat (2).

9. The machining fixture for the end face and outer side of the motor housing according to claim 1, characterized in that: The centering column (51) is provided with an ear plate (53) at one end near the back seat (2), and the ear plate (53) is connected to the back seat (2).

10. The machining fixture for the end face and outer side of the motor housing according to claim 1, characterized in that: The L-shaped support base is provided with reinforcing ribs (11) on both sides.

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