CN215588058U - Internal expanding gear clamp - Google Patents

Abstract

The utility model discloses an internal expansion type gear clamp which comprises a gear mounting seat and an expansion sleeve; the gear mounting seat comprises a supporting seat, a conical seat and a pull rod; the top of the supporting seat is used for supporting the lower end face of the gear; the top of the conical seat is small and the bottom of the conical seat is large, and the bottom of the conical seat is arranged at the top of the supporting seat; the pull rod comprises a rod head and a rod body, and the rod head is arranged at the upper end of the rod body; the club head comprises a pressing part, a base part and a sleeve pulling part which are sequentially connected from top to bottom; the bottom of the sleeve pulling part is connected with the upper end of the rod body; a pull rod mounting hole is formed in the gear mounting seat, and penetrates through the conical seat and the supporting seat from top to bottom; the rod body is inserted into the pull rod mounting hole from top to bottom and can move up and down in the pull rod mounting hole; the expansion sleeve is sleeved on the conical seat and can move up and down along the conical seat; a sleeve pulling flange is arranged on the inner side wall of the expansion sleeve; the gear clamp can conveniently and quickly clamp and disassemble the gear.

Description

Internal expanding gear clamp

Technical Field

The utility model relates to the field of gear machining, in particular to an internal expansion type gear clamp.

Background

In the gear hobbing process, a gear clamp is required to clamp the gear. The existing gear clamp comprises a conical seat and an expansion sleeve; a taper hole matched with the conical surface of the conical seat is formed in the expansion sleeve, and the expansion sleeve is sleeved on the conical seat; during clamping, the gear is sleeved on the outer wall of the expansion sleeve, then the expansion sleeve moves downwards, the conical seat continuously extends into the expansion sleeve, the inner wall of the expansion sleeve is continuously extruded, the expansion sleeve expands outwards, an inner hole in the middle of the expansion gear is expanded, and clamping of the gear is completed. When the gear is disassembled, the expansion sleeve moves upwards to separate the expansion sleeve from the conical seat, the extrusion force applied to the inner wall of the expansion sleeve disappears, the expansion sleeve recovers, and the clamping of the inner hole of the gear is loosened.

In the prior art, in the clamping process, the expansion sleeve can be conveniently moved downwards by applying a downward external force to the top end of the expansion sleeve, so that the gear is clamped. However, in the gear disassembling process, due to the limitation of operation space and the like, the upward external force is not convenient to be applied to the bottom of the expansion sleeve to move the expansion sleeve upwards, so that the gear is difficult to disassemble.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: to the problem that above-mentioned exists, provide an internal expanding gear anchor clamps, this gear anchor clamps can make things convenient for quick clamping and dismantlement gear.

The technical scheme adopted by the utility model is as follows:

an internal expansion type gear clamp comprises a gear mounting seat and an expansion sleeve; the gear mounting seat comprises a supporting seat, a conical seat and a pull rod; the top of the supporting seat is used for supporting the lower end face of the gear; the top of the conical seat is small and the bottom of the conical seat is large, and the bottom of the conical seat is arranged at the top of the supporting seat;

the pull rod comprises a rod head and a rod body, and the rod head is arranged at the upper end of the rod body; the club head comprises a pressing part, a base part and a sleeve pulling part which are sequentially connected from top to bottom; the bottom of the sleeve pulling part is connected with the upper end of the rod body; a pull rod mounting hole is formed in the gear mounting seat, and penetrates through the conical seat and the supporting seat from top to bottom; the rod body is inserted into the pull rod mounting hole from top to bottom and can move up and down in the pull rod mounting hole;

the expansion sleeve is sleeved on the conical seat and can move up and down along the conical seat; a sleeve pulling flange is arranged on the inner side wall of the expansion sleeve;

when the pull rod moves downwards, the pressing part is in contact with the top of the expanding sleeve, the sleeve pulling part enters the expanding sleeve and is positioned below the flange of the sleeve pulling part, the pressing part pushes the expanding sleeve to move downwards, and the conical seat extrudes the expanding sleeve to enable the expanding sleeve to tension the inner hole of the gear; when the pull rod moves upwards, the sleeve pulling part abuts against the bottom of the sleeve pulling flange to push the expansion sleeve to move upwards.

Further, the diameter of the pressing portion > the diameter of the sleeve-pulling portion > the diameter of the base portion; the bottom of the sleeve pulling part is provided with a chamfer angle, so that the sleeve pulling part is large at the top and small at the bottom; the sleeve pulling flange is positioned at the upper part of the expansion sleeve.

Furthermore, an expansion sleeve limiting block is arranged on the side part of the conical seat, and an expansion sleeve limiting opening is formed in the side wall of the bottom of the expansion sleeve; when the expansion sleeve limiting block is embedded into the expansion sleeve limiting opening, the expansion sleeve is limited to rotate on the conical seat.

Furthermore, a sliding groove is formed in the side surface of the rod body, and the sliding groove extends along the axial direction of the rod body; the supporting seat is provided with a rod body limiting block, and the rod body limiting block is positioned on one side of the rod body and extends into the sliding groove; the rod body limiting block can slide in the sliding groove and limit the rod body to rotate.

Further, the internal expanding gear clamp further comprises a pressing device, and the pressing device is used for pressing the top of the rod head and/or the upper end face of the gear downwards.

Further, the pressing device comprises an auxiliary centering pressing device, and the auxiliary centering pressing device comprises a pressing seat, a centering shaft and a centering shaft spring;

the lower end of the pressing seat is provided with a club head groove, and the depth of the club head groove is greater than the thickness of the club head; the lower end of the pressing seat is used for pressing the upper end face of the gear; when the lower end of the pressing seat is pressed on the upper end surface of the gear, the rod head is embedded into the stem groove;

a centering shaft mounting hole is vertically formed in the pressing seat, and the centering shaft and a centering shaft spring are arranged in the centering shaft mounting hole;

the centering shaft can move up and down in the centering shaft mounting hole and can extend out of the lower end of the centering shaft mounting hole; the centering shaft spring is positioned at the upper end of the centering shaft mounting hole and used for pushing the centering shaft to move downwards so that the lower end of the centering shaft presses the top of the rod head; the top of the rod head is provided with a center hole, and the lower end of the centering shaft is butted with the center hole.

Further, the centering shaft sequentially comprises a tip section, a shaft shoulder section and a centering shaft spring mounting section from bottom to top; the diameters of the tip section and the centering shaft spring mounting section are smaller than that of the shaft shoulder section;

the centering shaft mounting hole penetrates through the pressing seat, and sequentially comprises a tip section mounting hole and a shaft shoulder section mounting hole from bottom to top; the diameter of the tip section mounting hole is matched with that of the tip section, and the diameter of the shaft shoulder section mounting hole is matched with that of the shaft shoulder section;

the center section is arranged in the center section mounting hole, and the shaft shoulder section and the centering shaft spring mounting section are arranged in the shaft shoulder section mounting hole;

a stop block is arranged in the shaft shoulder section mounting hole, the stop block is positioned at the upper end of the shaft shoulder section mounting hole, the centering shaft spring is sleeved on the centering shaft spring mounting section, the lower end of the centering shaft spring is in contact with the shaft shoulder section, and the upper end of the centering shaft spring is in contact with the stop block;

the stop block is arranged in the shaft shoulder section mounting hole in a threaded connection mode; the middle part of the stop block is provided with a through hole, so that the upper end of the centering shaft spring mounting section can penetrate through the stop block.

Furthermore, the pressing device also comprises an elastic rotating tail top, and the elastic rotating tail top comprises a pressing shaft, an inner sleeve, an outer sleeve and a pressing shaft spring; the pressing shaft and the pressing spring are arranged in the inner sleeve; the pressing shaft can move up and down in the inner sleeve and can extend out of the lower end of the inner sleeve; the pressing shaft spring is positioned at the upper end of the inner sleeve and used for pushing the pressing shaft to move downwards so that the lower end of the pressing shaft presses the top of the pressing seat; the outer sleeve is sleeved outside the inner sleeve, the outer sleeve and the inner sleeve are relatively fixed in the vertical direction, and the outer sleeve can rotate around the inner sleeve.

Furthermore, the lower end of the inner sleeve is provided with an opening, the upper end of the inner sleeve is sealed, and the pressing shaft sequentially comprises a shaft body section and a pressing shaft spring mounting section from bottom to top; the diameter of the shaft body section is larger than that of the pressing shaft spring mounting section; the shaft body section and the pressing shaft spring mounting section are arranged in an inner sleeve, and the diameter of an inner hole of the inner sleeve is matched with that of the shaft body section; the pressing shaft spring is sleeved on the pressing shaft spring mounting section, the lower end of the pressing shaft spring is contacted with the shaft body section, and the upper end of the pressing shaft spring is contacted with the upper end of the inner sleeve; the upper end of the pressing shaft spring mounting section penetrates through the upper end of the inner sleeve.

Furthermore, the lower end of the shaft body is provided with a connecting disc, and the connecting disc is connected with the top of the pressing shaft through a bolt.

In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:

according to the utility model, the expansion sleeve can be controlled to tension or loosen the inner hole of the gear by moving the pull rod up and down, so that the gear can be conveniently and rapidly clamped and disassembled; the matching of the sleeve pulling part and the sleeve pulling flange solves the problem of difficult gear disassembly in the prior art; meanwhile, the pressing device presses the upper end face of the gear, so that the gear can be clamped more tightly, the lower end face of the gear can be completely attached to the top of the supporting seat, and the condition of unevenness is avoided; the pressing device presses the rod head, so that the rod head can be guaranteed to be pressed constantly, and the expansion sleeve is prevented from loosening. The elastic rotating tail jack is matched with the centering press device, and the upper end face of the gear and the rod head can be prevented from being pressed by the whole press device through two times of elastic action; the upper end surface of the gear and the rod head are prevented from being crushed.

Drawings

FIG. 1 is an overall block diagram of the present invention;

FIG. 2 is a block diagram of a gear mount;

FIG. 3 is a block diagram of the pull rod;

FIGS. 4 and 5 are structural views of the spline expander;

FIG. 6 is a block diagram of an auxiliary centering and pressing device;

fig. 7 is a structural view of the elastic swivel tail cap.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in figures 1-7, the utility model discloses an internal expansion type gear clamp, which comprises a gear mounting seat 1 and an expansion sleeve 4; the gear mounting seat 1 comprises a supporting seat 101, a conical seat 106 and a pull rod 105; the top of the supporting seat 101 is used for supporting the lower end face of the gear 5; the top of the conical seat 106 is small, and the bottom of the conical seat 106 is large, and the bottom of the conical seat 106 is arranged at the top of the supporting seat 101; the pull rod 105 comprises a head 1052 and a shaft 1051, the head 1052 is arranged at the upper end of the shaft 1051; the rod head 1052 includes a pressing part 10521, a base part 10522 and a sleeve-pulling part 10523 connected in sequence from top to bottom; the bottom of the sleeve pulling part 10523 is connected with the upper end of the rod body 1051; a pull rod 105 mounting hole is formed in the gear mounting base 1, and the pull rod 105 mounting hole penetrates through the conical base 106 and the supporting base 101 from top to bottom; the pull rod 105 mounting hole is positioned at the axis of the gear mounting seat 1; the rod 1051 is inserted into the mounting hole of the pull rod 105 from top to bottom and can move up and down in the mounting hole of the pull rod 105; the expansion sleeve 4 is sleeved on the conical seat 106 and can move up and down along the conical seat 106; a sleeve pulling flange 501 is arranged on the inner side wall of the expansion sleeve 4; when the pull rod 105 moves downwards, the pressing part 10521 is in contact with the top of the expanding sleeve 4, the sleeve pulling part 10523 enters the expanding sleeve 4 and is positioned below the sleeve pulling flange 501, the pressing part 10521 pushes the expanding sleeve 4 to move downwards, and the conical seat 106 extrudes the expanding sleeve 4, so that the expanding sleeve 4 tightly pulls the inner hole of the gear 5; when the pull rod 105 moves upward, the sleeve drawing part 10523 abuts against the bottom of the sleeve drawing flange 501, and pushes the expansion sleeve 4 to move upward.

In the structure, the expansion sleeve 4 can be controlled to tension or loosen the inner hole of the gear 5 by the up-and-down movement of the pull rod 105, so that the clamping and the disassembly of the gear 5 can be conveniently and rapidly completed; due to the existence of the pressing part 10521, the expansion sleeve 4 can be conveniently pushed to move downwards to complete clamping of the gear 5, and due to the existence of the sleeve pulling part 10523 and the sleeve pulling flange 501, the expansion sleeve 4 can be conveniently pushed to move upwards to complete disassembly of the gear 5; in the present invention, the lower end of the pull rod 105 can be connected to a driving mechanism such as a cylinder, a hydraulic cylinder, etc. for driving the pull rod 105 to move up and down.

The diameter of the pressing portion 10521 > the diameter of the sleeve-pulling portion 10523 > the diameter of the base portion 10522; the bottom of the sleeve pulling part 10523 is provided with a chamfer angle, so that the sleeve pulling part 10523 is in a shape of big top and small bottom; the sleeve pulling flange 501 is positioned at the upper part of the expansion sleeve 4.

As shown in fig. 3, the pressing part 10521 has a larger diameter in order to make the bottom of the pressing part 10521 contact with the top of the expansion sleeve 4 to push the expansion sleeve 4 to move down; the diameter of the sleeve pulling part 10523 is small so that the sleeve pulling part 10523 can be inserted into the expansion sleeve 4; in order to more conveniently enable the sleeve pulling part 10523 to be easily inserted into the expansion sleeve 4, the bottom of the sleeve pulling part 10523 is provided with a chamfer.

According to the fact that the inner hole of the gear 5 is a round hole or a spline hole, the expansion sleeve 4 can adopt a cylindrical expansion sleeve 4 or a spline expansion sleeve 4 to clamp gears 5 with different inner hole shapes. As shown in fig. 4-5, the expansion sleeve 4 in the figures is a spline expansion sleeve 4, and the side wall of the expansion sleeve 4 is provided with a plurality of notches, and the notches extend from the top to the bottom of the expansion sleeve 4 and/or the notches extend from the bottom to the top of the expansion sleeve 4; the outer wall of the expansion sleeve 4 is wrapped with a circle of key teeth; a taper hole 504 and a cylindrical hole 503 are formed in the expansion sleeve 4, and the shape of the taper hole 504 is matched with that of the taper seat 106; the taper hole 504 is positioned at the lower part of the expansion sleeve 4, and the cylindrical hole 503 is positioned at the upper part of the expansion sleeve 4; a circle of groove 502 is formed on the inner wall of the cylindrical hole 503, and the upper side wall of the groove 502 forms the bottom surface of the sleeve pulling flange 501; the sleeve drawing part 10523 is located in the groove 502, when the pull rod 105 moves upwards, the top of the sleeve part contacts with the bottom surface of the sleeve drawing flange 501, the expansion sleeve 4 is pushed to move upwards, and the gear 5 is disassembled.

An expansion sleeve limiting block 104 is arranged on the side part of the conical seat 106, and an expansion sleeve limiting opening 505 is formed in the side wall of the bottom of the expansion sleeve 4; when the expansion sleeve limiting stopper 104 is embedded into the expansion sleeve limiting opening 505, the expansion sleeve 4 is limited to rotate on the conical seat 106. As shown in fig. 2, the expansion sleeve stopper 104 is inserted into the conical seat 106 from the radial direction of the conical seat 106.

As shown in fig. 2, a sliding groove 102 is formed in a side surface of the shaft 1051, and the sliding groove 102 extends along an axial direction of the shaft 1051; a shaft 1051 limiting block 103 is arranged on the supporting seat 101, and the shaft 1051 limiting block 103 is inserted into the sliding groove 102 from one side of the supporting seat 101; the rod 1051 stopper 103 can slide in the sliding groove 102 and limit the rotation of the rod 1051.

Further, the internal expanding gear clamp further comprises a pressing device for pressing down the top of the rod head 1052 and/or the upper end surface of the gear 5.

Due to the structure, the upper end face of the gear 5 is pressed through the pressing device, so that the gear 5 can be clamped more tightly, and the lower end face of the gear 5 can be completely attached to the top of the supporting seat 101, so that the condition of unevenness is avoided; the pressing device presses the rod head 1052, so that the rod head 1052 can be guaranteed to be pressed constantly, and the expansion sleeve 4 is prevented from loosening.

The pressing device comprises a secondary centering pressing device 2, and the secondary centering pressing device 2 comprises a pressing seat 202, a centering shaft and a centering shaft spring 201; the lower end of the pressing seat 202 is provided with a rod head groove 203, and the depth of the rod head groove 203 is greater than the thickness of the rod head 1052; the lower end of the pressing base 202 is used for pressing the upper end face of the gear 5; when the lower end of the pressing base 202 is pressed on the upper end surface of the gear 5, the rod head 1052 is embedded into the stem groove; a centering shaft mounting hole is vertically formed in the pressing seat 202, and the centering shaft and a centering shaft spring 201 are arranged in the centering shaft mounting hole; the centering shaft can move up and down in the centering shaft mounting hole and can extend out of the lower end of the centering shaft mounting hole; the centering shaft spring 201 is positioned at the upper end of the centering shaft mounting hole and is used for pushing the centering shaft to move downwards, so that the lower end of the centering shaft presses the top of the club head 1052; the top of the rod head 1052 is provided with a central hole, and the lower end of the centering shaft is butted with the central hole.

As shown in fig. 6, the head groove 203 is formed to enable the rod head 1052 to be inserted into the head groove 203, thereby ensuring that the lower end of the pressing base 202 can be pressed on the upper end surface of the gear 5; the depth of the rod head groove 203 is larger than the thickness of the rod head 1052, so that the rod head 1052 can be completely embedded into the rod head groove 203, and the situation that the lower end of the pressing seat 202 cannot be pressed on the end surface of the upper gear 5 is avoided; meanwhile, the depth of the rod head groove 203 is larger than the thickness of the rod head 1052, so that the pull rod 105 can move upwards to push the expansion sleeve 4 to move upwards under the condition that the pressing seat 202 is pressed on the upper end surface of the gear 5, and further the workpiece is disassembled; the centering shaft moves downwards under the pushing of the centering shaft spring 201 and penetrates through the top of the rod head groove 203 to press the top of the pull rod 105, when driving mechanisms such as a hydraulic cylinder, a pneumatic cylinder and the like stop driving the pull rod 105 to move, the centering shaft can be ensured to press the pull rod 105 downwards all the time due to the action of the elastic force of the centering shaft spring 201, the pull rod 105 is prevented from moving upwards, and the stability of clamping is ensured; the centre bore is seted up at the head 1052 top, can guarantee that the centering shaft is vertical to exert pressure downwards, takes place phenomenons such as slip when avoiding centering shaft and head 1052 top contact, and simultaneously, the centering shaft lower extreme docks with the centre bore, can avoid pull rod 105 horizontal hunting in pull rod 105 mounting hole, plays the effect of supplementary centering.

Further, as shown in fig. 1 and 6, the centering shaft comprises a tip section 204, a shaft shoulder section 205 and a centering shaft spring mounting section 206 in sequence from bottom to top; the diameter of the apex section 204 and the centering shaft spring mounting section 206 is smaller than the diameter of the shoulder section 205; the centering shaft mounting hole is positioned on the axis of the pressing base 202 and penetrates through the pressing base 202, and comprises a top section 204 mounting hole and a shaft shoulder section 205 mounting hole from bottom to top in sequence; the diameter of the mounting hole of the tip section 204 is matched with that of the tip section 204, and the diameter of the mounting hole of the shaft shoulder section 205 is matched with that of the shaft shoulder section 205; the tip section 204 is arranged in the mounting hole of the tip section 204, and the shaft shoulder section 205 and the centering shaft spring mounting section 206 are arranged in the mounting hole of the shaft shoulder section 205; a stop block 207 is arranged in the mounting hole of the shaft shoulder section 205, the stop block 207 is positioned at the upper end of the mounting hole of the shaft shoulder section 205, the centering shaft spring 201 is sleeved on the centering shaft spring mounting section 206, the lower end of the centering shaft spring 201 is contacted with the shaft shoulder section 205, and the upper end of the centering shaft spring 201 is contacted with the stop block 207; the stop block 207 is arranged in the mounting hole of the shaft shoulder section 205 in a threaded connection manner; a through hole is formed in the middle of the stopper 207, so that the upper end of the centering shaft spring mounting section 206 can pass through the stopper 207.

Due to the structure, the shaft shoulder section 205 is matched with the rear end of the mounting hole of the center section 204, so that the downward movement of the centering shaft can be limited, and the centering shaft is prevented from falling out of the pressing seat 202 under the action of the centering shaft spring 201; the stop block 207 is in threaded connection with the mounting hole of the shaft shoulder section 205, so that the position of the stop block 207 in the mounting hole of the shaft shoulder section 205 can be conveniently adjusted, the compression amount of the centering shaft spring 201 can be further adjusted, and the elastic force can be adjusted.

Further, the pressing device further comprises an elastic rotating tail top 3, and the elastic rotating tail top 3 comprises a pressing shaft, an inner sleeve 308, an outer sleeve 309 and a pressing shaft spring 301; the pressing shaft and the pressing spring are arranged in the inner sleeve 308; the pressing shaft can move up and down in the inner sleeve 308 and can extend out of the lower end of the inner sleeve 308; the pressing shaft spring 301 is positioned at the upper end of the inner sleeve 308 and used for pushing the pressing shaft to move downwards so that the lower end of the pressing shaft presses the top of the pressing seat 202; the outer sleeve 309 is sleeved outside the inner sleeve 308, the positions of the outer sleeve 309 and the inner sleeve 308 in the vertical direction are fixed relatively, and the outer sleeve 309 can rotate around the inner sleeve 308.

Because the elastic rotating tail top 3 is matched with the centering press device, the whole press device can be prevented from rigidly pressing the upper end surface of the gear 5 and the rod head 1052 through two times of elastic action; the upper end surface of the gear 5 and the rod head 1052 are prevented from being crushed; due to the fact that the pressing spring is arranged in the elastic rotating tail top 3, the downward acting force is applied to the auxiliary centering pressing device 2 through the elastic rotating tail top 3, and the situation that the lower end of the pressing seat 202 directly and rigidly presses the upper end face of the gear 5 can be avoided; due to the centering shaft spring 201 in the auxiliary centering pressing device 2, the centering shaft can be prevented from pressing the rod head 1052 rigidly;

during operation, the outer sleeve 309 moves downwards under the action of external force, so that the pressing shaft presses the top of the pressing base 202 under the action of the pressing spring, and the lower end of the pressing base 202 presses the upper end face of the gear 5; when the gear 5 is in a clamping state, and the gear mounting seat 1 and the gear 5 integrally rotate together, the outer sleeve 309 can rotate relative to the inner sleeve 308, and the pressing seat 202 and the pressing shaft can rotate along with the pressing shaft under the action of friction force; because the outer sleeve 309 and the inner sleeve 308 are fixed in position in the vertical direction, the inner sleeve 309 and the outer sleeve 309 can only rotate, and the whole elastic rotating tail top 3 can still provide downward pressing force under the condition that the outer sleeve 309 and the gear mounting seat 1 and the gear 5 rotate relatively.

Further, as shown in fig. 1 and 7, the lower end of the inner sleeve 308 is open, the upper end is sealed, and the pressing shaft comprises a shaft body section 303 and a pressing shaft spring mounting section 302 in sequence from bottom to top; the diameter of the shaft body section 303 is larger than the diameter of the pressing shaft spring mounting section 302; the shaft body section 303 and the pressing shaft spring mounting section 302 are arranged in an inner sleeve 308, and the diameter of an inner hole of the inner sleeve 308 is matched with that of the shaft body section 303; the pressing shaft spring 301 is sleeved on the pressing shaft spring mounting section 302, the lower end of the pressing shaft spring 301 is in contact with the shaft body section 303, and the upper end of the pressing shaft spring 301 is in contact with the upper end of the inner sleeve 308; the upper end of the pressing shaft spring mounting section 302 extends through the upper end of the inner sleeve 308.

As shown in fig. 1 and 7, the lower end of the shaft body is provided with a connecting plate 304, and the connecting plate 304 is connected with the top of the pressing shaft through a bolt. Through bolted connection's mode, can guarantee the stability of pressing, simultaneously, when gear mount pad 1 and gear 5 take place the rotation together, avoid pressing the disconnection of seat 202 top and pressing axle lower extreme.

As shown in fig. 7, the outer sleeve 309 is rotatably sleeved on the inner sleeve 308 through a bearing; the lower end and the upper end of the inner sleeve 308 are provided with bearings and are separated by a spacer 307; the lower end of the inner sleeve 308 is provided with a shaft shoulder for positioning the bearing shaft 306 at the lower end of the inner sleeve 308 in the axial direction, and the upper end of the inner sleeve 308 is provided with a bearing end cover 3010 for positioning the bearing shaft 306 at the upper end of the inner sleeve 308 in the axial direction; the lower end of the outer sleeve 309 is connected with a lower end cover 305, the lower end cover 305 is sleeved on a shaft shoulder at the lower end of the inner sleeve 308, and the lower end cover 305 is used for limiting the outer sleeve 309 to move downwards; an upper end cap 3011 is also attached to the rear end of the outer sleeve 309.

The using process of the utility model is as follows:

when the gear 5 is clamped, the expansion sleeve 4 is firstly sleeved on the conical seat 106, so that the expansion sleeve limiting block 104 is embedded into the expansion sleeve limiting opening 505 to limit the expansion sleeve 4 to rotate on the conical seat 106; then the gear 5 is sleeved on the expansion sleeve 4; a driving mechanism such as an air cylinder or a hydraulic cylinder is connected with the lower end of the pull rod 105 to drive the pull rod 105 to move downwards, a pressing part 10521 of the rod head 1052 is contacted with the top of the expanding sleeve 4, a sleeve pulling part 10523 enters the expanding sleeve 4 and is positioned below a sleeve pulling flange 501, the pressing part 10521 pushes the expanding sleeve 4 to move downwards, and the conical seat 106 extrudes the expanding sleeve 4 to enable the expanding sleeve 4 to tension the inner hole of the gear 5; then, the driving mechanism such as the air cylinder or the hydraulic cylinder stops working, and then the upper end surface of the gear 5 and the top of the rod head 1052 are pressed through the pressing device; before pressing, the pressing seat 202 of the auxiliary centering pressing device 2 and the pressing shaft of the elastic rotating tail top 3 are firstly connected together through a bolt; when in pressing, an external power device such as an air cylinder or a hydraulic cylinder pushes the outer sleeve 309 of the elastic rotating tail top 3 to move downwards, so that the pressing shaft pushes the pressing base 202 to move downwards under the action of the elastic force of the pressing shaft spring 301, the centering shaft in the pressing base 202 is firstly pressed on the top of the rod head 1052, then the elastic rotating tail top 3 continuously moves downwards, the pressing base 202 is pushed to continuously move downwards, the lower end of the pressing base 202 is pressed on the upper end surface of the gear 5, and the clamping of the gear 5 is completed.

When the gear 5 is disassembled, the pressing device is firstly fixed, because the depth of the rod head groove 203 is larger than the thickness of the rod head 1052, a driving mechanism such as an air cylinder or a hydraulic cylinder can push the pull rod 105 to move upwards for a short distance, so that the sleeve pulling part 10523 abuts against the bottom of the sleeve pulling flange 501, the expansion sleeve 4 is pushed to move upwards for a short distance, the tension of the inner hole of the gear 5 is released, then the pressing device moves upwards, the upper end surface of the gear 5 and the top of the rod head 1052 are not pressed, at the moment, the pull rod 105 continues to move upwards, and the gear 5 is disassembled. The pressing device is firstly fixed, so that the expansion sleeve 4 can be separated from the inner hole of the gear 5, and the situation that the expansion sleeve 4 is attached to the inner hole of the gear 5 and cannot be taken down is avoided.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.

Claims (10)

1. The utility model provides an internal expanding gear clamp which characterized in that: the device comprises a gear mounting seat (1) and an expansion sleeve (4);

the gear mounting seat (1) comprises a supporting seat (101), a conical seat (106) and a pull rod (105); the top of the supporting seat (101) is used for supporting the lower end face of the gear (5); the top of the conical seat (106) is small, and the bottom of the conical seat (106) is large, and the bottom of the conical seat (106) is arranged at the top of the supporting seat (101);

the pull rod (105) comprises a head (1052) and a shaft (1051), wherein the head (1052) is arranged at the upper end of the shaft (1051); the club head (1052) comprises a pressing part (10521), a base part (10522) and a sleeve pulling part (10523) which are connected in sequence from top to bottom; the bottom of the sleeve pulling part (10523) is connected with the upper end of the rod body (1051); a pull rod (105) mounting hole is formed in the gear mounting seat (1), and the pull rod (105) mounting hole penetrates through the conical seat (106) and the supporting seat (101) from top to bottom; the rod body (1051) is inserted into the mounting hole of the pull rod (105) from top to bottom and can move up and down in the mounting hole of the pull rod (105);

the expansion sleeve (4) is sleeved on the conical seat (106) and can move up and down along the conical seat (106); a sleeve pulling flange (501) is arranged on the inner side wall of the expansion sleeve (4);

when the pull rod (105) moves downwards, the pressing part (10521) is in contact with the top of the expansion sleeve (4), the sleeve pulling part (10523) enters the expansion sleeve (4) and is positioned below the sleeve pulling flange (501), the pressing part (10521) pushes the expansion sleeve (4) to move downwards, and the conical seat (106) extrudes the expansion sleeve (4), so that the expansion sleeve (4) tightly pulls the inner hole of the gear (5); when the pull rod (105) moves upwards, the sleeve pulling part (10523) abuts against the bottom of the sleeve pulling flange (501) to push the expansion sleeve (4) to move upwards.

2. The internal expanding gear clamp of claim 1, wherein: the diameter of the pressing part (10521) is larger than the diameter of the sleeve pulling part (10523) is larger than the diameter of the base part (10522); the bottom of the sleeve pulling part (10523) is provided with a chamfer angle, so that the sleeve pulling part (10523) is large at the top and small at the bottom; the sleeve pulling flange (501) is positioned at the upper part of the expansion sleeve (4).

3. The internal expanding gear clamp of claim 1, wherein: an expansion sleeve limiting block (104) is arranged on the side part of the conical seat (106), and an expansion sleeve limiting opening (505) is formed in the side wall of the bottom of the expansion sleeve (4); when the expansion sleeve limiting block (104) is embedded into the expansion sleeve limiting opening (505), the expansion sleeve (4) is limited to rotate on the conical seat (106).

4. The internal expanding gear clamp of claim 1, wherein: a sliding groove (102) is formed in the side surface of the rod body (1051), and the sliding groove (102) extends along the axial direction of the rod body (1051); a rod body (1051) limiting block (103) is arranged on the supporting seat (101), and the rod body (1051) limiting block (103) is inserted into the sliding groove (102) from one side of the supporting seat (101); the rod body (1051) limiting block (103) can slide in the sliding groove (102) and limit the rod body (1051) to rotate.

5. The internal expanding gear clamp of claim 1, wherein: the internal expanding gear clamp further comprises a pressing device which is used for pressing the top of the rod head (1052) and/or the upper end surface of the gear (5) downwards.

6. The internal expanding gear clamp of claim 5, wherein: the pressing device comprises an auxiliary centering pressing device (2), wherein the auxiliary centering pressing device (2) comprises a pressing seat (202), a centering shaft and a centering shaft spring (201);

the lower end of the pressing seat (202) is provided with a rod head groove (203), and the depth of the rod head groove (203) is greater than the thickness of the rod head (1052); the lower end of the pressing seat (202) is used for pressing the upper end face of the gear (5); when the lower end of the pressing seat (202) is pressed on the upper end surface of the gear (5), the rod head (1052) is embedded into the stem groove;

a centering shaft mounting hole is vertically formed in the pressing seat (202), and the centering shaft and a centering shaft spring (201) are arranged in the centering shaft mounting hole;

the centering shaft can move up and down in the centering shaft mounting hole and can extend out of the lower end of the centering shaft mounting hole; the centering shaft spring (201) is positioned at the upper end of the centering shaft mounting hole and is used for pushing the centering shaft to move downwards so that the lower end of the centering shaft presses the top of the club head (1052); the top of the rod head (1052) is provided with a central hole, and the lower end of the centering shaft is butted with the central hole.

7. The internal expanding gear clamp of claim 6, wherein:

the centering shaft sequentially comprises a tip section (204), a shaft shoulder section (205) and a centering shaft spring mounting section (206) from bottom to top; the diameters of the tip section (204) and the centering shaft spring mounting section (206) are smaller than the diameter of the shaft shoulder section (205);

the centering shaft mounting hole penetrates through the pressing seat (202), and sequentially comprises a top section (204) mounting hole and a shaft shoulder section (205) mounting hole from bottom to top; the diameter of the mounting hole of the tip section (204) is matched with that of the tip section (204), and the diameter of the mounting hole of the shaft shoulder section (205) is matched with that of the shaft shoulder section (205);

the top tip section (204) is arranged in a mounting hole of the top tip section (204), and the shaft shoulder section (205) and the centering shaft spring mounting section (206) are arranged in a mounting hole of the shaft shoulder section (205);

a stop block (207) is arranged in the mounting hole of the shaft shoulder section (205), the stop block (207) is positioned at the upper end of the mounting hole of the shaft shoulder section (205), the centering shaft spring (201) is sleeved on the centering shaft spring mounting section (206), the lower end of the centering shaft spring (201) is contacted with the shaft shoulder section (205), and the upper end of the centering shaft spring (201) is contacted with the stop block (207);

the stop block (207) is arranged in the mounting hole of the shaft shoulder section (205) in a threaded connection mode; the middle part of the stop block (207) is provided with a through hole, so that the upper end of the centering shaft spring mounting section (206) can penetrate through the stop block (207).

8. The internal expanding gear clamp of claim 6 or 7, wherein: the pressing device further comprises an elastic rotating tail top (3), and the elastic rotating tail top (3) comprises a pressing shaft, an inner sleeve (308), an outer sleeve (309) and a pressing shaft spring (301); the pressing shaft and the pressing spring are arranged in the inner sleeve (308); the pressing shaft can move up and down in the inner sleeve (308) and can extend out of the lower end of the inner sleeve (308); the pressing shaft spring (301) is positioned at the upper end of the inner sleeve (308) and used for pushing the pressing shaft to move downwards so that the lower end of the pressing shaft presses the top of the pressing seat (202); the outer sleeve (309) is sleeved outside the inner sleeve (308), the positions of the outer sleeve (309) and the inner sleeve (308) in the vertical direction are relatively fixed, and the outer sleeve (309) can rotate around the inner sleeve (308).

9. The internal expanding gear clamp of claim 8, wherein: the lower end of the inner sleeve (308) is open, the upper end of the inner sleeve is sealed, and the pressing shaft sequentially comprises a shaft body section (303) and a pressing shaft spring mounting section (302) from bottom to top; the diameter of the shaft body section (303) is larger than that of the pressing shaft spring mounting section (302); the shaft body section (303) and the pressing shaft spring mounting section (302) are arranged in an inner sleeve (308), and the diameter of an inner hole of the inner sleeve (308) is matched with that of the shaft body section (303); the pressing shaft spring (301) is sleeved on the pressing shaft spring mounting section (302), the lower end of the pressing shaft spring (301) is in contact with the shaft body section (303), and the upper end of the pressing shaft spring (301) is in contact with the upper end of the inner sleeve (308); the upper end of the pressing shaft spring mounting section (302) penetrates through the upper end of the inner sleeve (308).

10. The internal expanding gear clamp of claim 9, wherein: the lower end of the shaft body is provided with a connecting disc (304), and the connecting disc (304) is connected with the top of the pressing shaft through a bolt.

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