CN219900469U - Compressing device and hydraulic trepan - Google Patents

Abstract

The utility model provides a compressing device and a hydraulic trepan, wherein the compressing device is used for compressing saw teeth and comprises: the roller bush is internally provided with a first accommodating space, the first end of the roller bush is provided with a locking hole communicated with the first accommodating space, and the second end of the roller bush is provided with an opening; the eccentric sleeve is arranged in the first accommodating space; the first end of the first screw rod is eccentrically connected with the eccentric sleeve from the locking hole, and the second end of the first screw rod is exposed out of the roller bushing; the roller shaft is sleeved on the periphery of the second end of the roller bushing and is connected with the eccentric sleeve through the opening part; the first nut is sleeved on the periphery of the second end of the first screw rod and used for locking the first screw rod and the roller bushing; when the first nut does not lock the first screw rod and the roller bushing, the first screw rod rotates under the action of external force, and then the eccentric sleeve is driven to eccentrically rotate, and further the roller shaft is driven to rotate. The compressing device adopted by the utility model can compress the saw teeth, and provides powerful conditions for improving the cutting depth of the saw teeth.

Description

Compressing device and hydraulic trepan

Technical Field

The utility model belongs to the technical field of metal cutting processing equipment, and particularly relates to a pressing device and a hydraulic trepan.

Background

The cutting tool for breaking reinforced concrete in the market comprises a circular cutting saw, wherein a circular saw blade of the circular cutting saw is fixed through a central shaft, and when the circular cutting saw fixed by the central shaft rotates to perform cutting work, the actual cutting depth of the circular cutting saw is smaller than the radius of the circular saw blade due to the limitation of the central shaft.

Disclosure of Invention

In view of the above, the present utility model provides a pressing device and a hydraulic trepan, so as to solve the problem that the actual cutting depth of saw teeth caused by a fixing mechanism in the prior art is smaller than the radius of a circular saw blade.

The technical problems are solved, and the utility model adopts a technical scheme that: there is provided a hold-down device for holding down serrations, the hold-down device comprising: the roller lining is internally provided with a first accommodating space, the first end of the roller lining is provided with a locking hole communicated with the first accommodating space, and the second end of the roller lining is provided with an opening part; the eccentric sleeve is arranged in the first accommodating space; the first end of the first screw rod is eccentrically connected with the eccentric sleeve from the locking hole, and the second end of the first screw rod is exposed out of the roller bushing; the roller shaft is sleeved on the periphery of the second end of the roller bushing and is connected with the eccentric sleeve through the opening part; the first nut is sleeved on the periphery of the second end of the first screw rod and used for locking the first screw rod and the roller bushing; when the first nut does not lock the first screw rod and the roller bushing, the first screw rod rotates under the action of external force, so that the eccentric sleeve is driven to eccentrically rotate, and the roller shaft is driven to rotate.

According to one embodiment of the utility model, a second accommodating space is arranged inside the eccentric sleeve; the compaction device further includes: the rotating mechanism is arranged in the second accommodating space, and the eccentric sleeve is movably connected with the roller shaft through the rotating mechanism; when the first screw rod rotates under the action of external force, the eccentric sleeve drives the roller shaft to rotate through the rotating mechanism, and when the first screw rod is locked with the roller bushing, the roller shaft rotates along with the rotation of the saw teeth.

According to an embodiment of the present utility model, the rotation mechanism includes: a rotating shaft inserted in the second accommodating space through the roller shaft, wherein the rotating shaft is coaxially arranged with the roller shaft; the first bearing and the second bearing are sleeved on the periphery of the rotating shaft, and the outer rings of the first bearing and the second bearing are fixedly connected with the eccentric sleeve; the first shaft sleeve is sleeved on the periphery of the rotating shaft and is positioned between the first bearing and the second bearing, the first bearing and the inner ring of the first bearing are fixedly connected, the second shaft sleeve is sleeved on the outer side of the first shaft sleeve, and the first bearing and the outer ring of the first bearing are fixedly connected.

According to an embodiment of the present utility model, the rotating shaft is axially provided with a hollow structure, and the compressing device further includes: a second nut; the second screw rod sequentially penetrates through the second nut and the roller shaft to be inserted into the rotating shaft and used for locking the roller shaft and the rotating shaft.

According to an embodiment of the present utility model, the compressing apparatus further includes: the oil seal is positioned at the opening part and sleeved on the outer side of the rotating shaft, wherein the outer surface of the oil seal is in contact with the inner surface of the eccentric sleeve; the clamping spring for the hole is arranged between the oil seal and the second bearing, wherein the first bearing is positioned at one side of the second bearing, which is away from the oil seal; the periphery of the rotating shaft is further sleeved with a third shaft sleeve, and the periphery of the third shaft sleeve is in contact with the oil seal.

According to one embodiment of the utility model, the surface of the eccentric sleeve facing the first screw rod is convexly provided with a positioning pin; the roller bushing is provided with an arcuate groove that receives the locating pin, which slides within the range defined by the arcuate groove.

According to one embodiment of the utility model, the outer surface of the roller bushing is provided with a mounting hole; the compaction device further includes: the side pushing gear is sleeved on the periphery of the first screw rod, and the first screw rod is fixedly connected with the eccentric sleeve after penetrating through the side pushing gear, wherein at least part of meshing teeth of the side pushing gear are exposed in the mounting hole; one end of the adjusting screw rod is positioned in the mounting hole and meshed with the side pushing gear, and the other end of the adjusting screw rod is exposed out of the roller bushing; when the first screw rod and the roller bushing are not locked, if the adjusting screw rod is rotated, the adjusting screw rod drives the side pushing gear to rotate, and then the side pushing gear drives the first screw rod to rotate.

According to an embodiment of the present utility model, the compressing apparatus further includes: the fourth shaft sleeve is positioned in the mounting hole and sleeved on the outer side of the adjusting screw, which is not provided with the meshing teeth; and the locking screw locks the fourth shaft sleeve and the roller bushing.

According to one embodiment of the utility model, the outer surface of the roller shaft is provided with an annular groove for receiving an annular protrusion provided on the serration.

In order to solve the technical problems, the utility model also provides a hydraulic trepan, which comprises saw teeth and the compacting device.

The beneficial effects of the utility model are as follows: in contrast to the state of the art, the utility model provides a pressing device for pressing serrations, comprising a roller bushing, an eccentric sleeve, a first screw, a roller shaft and a first nut. The first screw rod is locked with the roller bushing by the first nut, and rotates under the action of external force, so that the eccentric sleeve is driven to eccentrically rotate, and the roller shaft is driven to rotate. The compressing device can compress the saw teeth, so that the cutting depth of the saw teeth exceeds the radius of the saw teeth, and the cutting operation capability of the saw teeth can be improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a schematic view of a hydraulic circular saw according to the present utility model;

FIG. 2 is a partial schematic view of the hydraulic trepan of FIG. 1;

FIG. 3 is a cross-sectional view of the hydraulic trephine of FIG. 1;

FIG. 4 is a cross-sectional view of the compression device of FIG. 1;

FIG. 5 is a partial schematic view of the roller shaft and serrations of FIG. 3;

fig. 6 is a partial schematic view of the compression device of fig. 2.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

Referring to fig. 1 and 2, in one embodiment of the present utility model, the hydraulic saw tooth 50 includes a main housing 501, a pressing device 10, and a saw tooth 101. The serrations 101 are inserted in the main housing 501; the pressing device 10 is mounted on the main housing 501, and referring to fig. 2, the pressing device 10 is located at the a side of the saw tooth 101, and the pressing device 10 presses at least part of the saw tooth 101 located in the main housing 501. Wherein, by using the pressing device 10 to press the saw teeth 101, the cutting depth of the saw teeth 101 can exceed the radius of the saw teeth 101, and the cutting depth of the saw teeth 101 can be increased, thereby improving the cutting operation capability of the saw teeth 101.

Referring to fig. 3 and 4, in one embodiment of the present utility model, the pressing device 10 includes a roller bushing 11, an eccentric sleeve 12, a first screw 13, and a roller shaft 14.

The roller bushing 11 is internally provided with a first accommodating space, the first end of the roller bushing 11 is provided with a locking hole 132 communicated with the first accommodating space, and the second end of the roller bushing 11 is provided with an opening part; the eccentric sleeve 12 is arranged in the first accommodating space; the first end of the first screw rod 13 is eccentrically connected with the eccentric sleeve 12 from the locking hole 132, and the second end is exposed outside the roller bushing 11; the roller shaft 14 is sleeved on the periphery of the second end of the roller bushing 11 and is connected with the eccentric sleeve 12 through an opening part; the first nut 131 is sleeved on the periphery of the second end of the first screw 13 and is used for locking the first screw 13 with the roller bushing 11; when the first nut 131 does not lock the first screw 13 and the roller bushing 11, the first screw 13 rotates under the action of external force, so as to drive the eccentric sleeve 12 to eccentrically rotate, and further drive the roller shaft 14 to rotate.

Specifically, the roller bushing 11 is provided with a first accommodating space inside, that is, the roller bushing 11 is of a hollow structure, as can be seen from fig. 3, the roller bushing 11 is divided into an upper half portion, that is, a first end of the roller bushing 11, a lower half portion includes a first accommodating space, that is, a second end of the roller bushing 11, and the upper half portion and the lower half portion of the roller bushing 11 are connected through a locking hole 132, that is, the locking hole 132 communicates the first end of the upper half portion of the roller bushing 11 with the first accommodating space of the lower half portion. The second end of the roller bushing 11 is provided with an open portion, i.e. the second end of the roller bushing 11 is provided open.

The eccentric sleeve 12 is disposed in the first accommodating space of the roller bushing 11, the first screw rod 13 passes through the locking hole and is eccentrically connected with the eccentric sleeve 12, that is, the central axis of the eccentric sleeve 12 is not in the same straight line with the central axis of the first screw rod 13, that is, the eccentric sleeve 12 is non-coaxially disposed with the first screw rod 13, and meanwhile, one end of the first screw rod 13 is exposed outside the roller bushing 11, and the other end is inserted into the roller bushing 11 through the locking hole 132 and is connected with the eccentric sleeve 12, wherein the first screw rod 13 is parallel to the saw teeth.

The roller shaft 14 is fitted around the second end of the lower half of the roller bushing 11, and is connected to the eccentric sleeve 12 through the opening of the roller bushing 11. The function of the roller shaft 14 is, among other things, to limit the teeth, as will be described in more detail below.

The first nut 131 is sleeved on the first end of the first screw rod 13, when the first nut 131 is screwed, the first screw rod 13 is locked with the roller bushing 11, and since the first screw rod 13 is connected with the eccentric sleeve 12, the roller bushing 11 is also locked with the eccentric sleeve 12 at this time, that is, when the first nut 131 is screwed, the roller bushing 11 is also locked with the eccentric sleeve 12, and the two cannot move relatively. When the first nut 131 does not completely lock the first screw 13 and the roller bushing 11, the eccentric bushing 12 is connected to the first screw 13 when the operator rotates the first screw 13, so that the eccentric bushing 12 is also rotated along with the first screw 13, and the central axis of the eccentric bushing 12 and the central axis of the first screw 13 are not in the same line, so that the eccentric bushing 12 is eccentrically rotated under the driving of the first screw 13, and further the roller shaft 14 is eccentrically rotated, so that the distance between the roller shaft 14 and the saw tooth 101 can be adjusted, and after the distance between the roller shaft 14 and the saw tooth 101 reaches the preset distance, the first nut 131 is screwed, at this time, the roller bushing 11 and the eccentric bushing 12 are locked, and the roller bushing 11 is fixedly mounted on the main housing 501 of the hydraulic saw tooth 50, so that the roller bushing 11 cannot be rotated relative to the main housing 501, and the eccentric bushing 12 cannot be rotated relative to the main housing 501, that is, after the first nut 131 is screwed, the eccentric bushing 12 cannot be rotated regardless of whether the saw tooth 101 is moved.

As can be seen from the above, the compression assembly 10 provided by the present utility model drives the eccentric sleeve 12 to eccentrically rotate through the first screw 13, thereby driving the roller shaft 14 to eccentrically rotate, adjusting the distance between the roller shaft 14 and the saw teeth 101, so that the distance between the roller shaft 14 and the saw teeth 101 reaches a preset distance, thereby limiting the saw teeth 101 in a direction perpendicular to the saw teeth 101 by using the roller shaft 14, screwing the first nut 131 after the distance between the roller shaft 14 and the saw teeth 101 reaches the preset distance, and the roller bushing 11 is also locked with the eccentric sleeve 12, and thereafter the eccentric sleeve 12 does not rotate regardless of whether the saw teeth 101 move.

With continued reference to fig. 4, a second accommodating space is provided inside the eccentric sleeve 12; the pressing device 10 further comprises a rotating mechanism arranged in the second accommodating space, and the eccentric sleeve 12 is movably connected with the roller shaft 14 through the rotating mechanism; when the first screw 13 rotates under the action of external force, the eccentric sleeve 12 drives the roller shaft 14 to rotate through the rotating mechanism, and when the first screw 13 and the roller bushing 11 are not locked, the roller shaft 14 rotates along with the rotation of the saw teeth 101.

Specifically, the eccentric sleeve 12 is internally provided with a second accommodating space, a rotating mechanism is arranged in the second accommodating space, the eccentric sleeve 12 is movably connected with the roller shaft 14 through the rotating mechanism, when the first screw rod 13 rotates under the action of external force, the eccentric sleeve 12 drives the roller shaft 14 to rotate through the rotating mechanism, when the first screw rod 13 is locked with the roller bushing 11, the roller shaft 14 rotates along with the rotation of the saw teeth 101, the friction caused by the rotation of the saw teeth 101 can be reduced, and the service life of the compacting device 10 is prolonged.

In other embodiments, the rotating mechanism may not be provided, and the roller shaft 14 and the eccentric sleeve 12 may be fixedly connected at this time, and as is apparent from the above description, when the first nut 131 is screwed, the eccentric sleeve 12 does not rotate relative to the main housing 501, so if the roller shaft 14 and the eccentric sleeve 12 are fixedly connected, and further, the roller shaft 14 does not rotate relative to the main housing 501, that is, as the saw teeth 101 rotate, the roller shaft 14 does not rotate, and at this time, in order not to affect the rotation of the saw teeth 101, when the saw teeth 101 are limited by the roller shaft 14 in the direction perpendicular to the saw teeth 101, a certain gap needs to exist between the roller shaft 14 and the saw teeth 101.

With continued reference to fig. 4, the rotation mechanism includes a rotation shaft 15, a first bearing 151, a second bearing 152, a first sleeve 161, and a second sleeve 162.

The rotating shaft 15 is inserted in the second accommodating space through the roller shaft 14, wherein the rotating shaft 15 is coaxially arranged with the roller shaft 14; the first bearing 151 and the second bearing 152 are sleeved on the periphery of the rotating shaft 15, wherein the outer rings of the first bearing 151 and the second bearing 152 are fixedly connected with the eccentric sleeve 12; the first shaft sleeve 161 is sleeved on the periphery of the rotating shaft 15 and is positioned between the first bearing 151 and the second bearing 152, the first bearing 151 is fixedly connected with the inner ring of the first bearing 151, the second shaft sleeve 162 is sleeved on the outer side of the first shaft sleeve 161, and the first bearing 151 is fixedly connected with the outer ring of the first bearing 151.

Specifically, the rotating shaft 15 is inserted into the second accommodating space inside the eccentric sleeve 12 through the roller shaft 14, the rotating shaft 15 is coaxially disposed with the roller shaft 14, the roller shaft 14 is used for compressing the saw teeth 101, and the rotating shaft 15 rotates synchronously when the roller shaft 14 rotates along with the rotation of the saw teeth 101.

The first bearing 151 and the second bearing 152 both comprise an inner ring and an outer periphery, the outer ring of the first bearing 151 and the outer ring of the second bearing 152 are fixedly connected with the eccentric sleeve 12, and after the fixed connection, the outer ring of the first bearing 151 and the outer ring of the second bearing 152 do not synchronously rotate along with the rotating shaft 15.

The first shaft sleeve 161 is sleeved on the periphery of the rotating shaft 15, and the first shaft sleeve 161 is located between the first bearing 151 and the second bearing 152, and the first shaft sleeve 161 is fixedly connected with the first bearing 151 and the inner ring of the first bearing 151. When the rotation shaft 15 rotates, the first shaft sleeve 161 and the inner ring of the first bearing 151 rotate simultaneously. The second shaft sleeve 162 is sleeved on the outer side of the first shaft sleeve 161, and is fixedly connected with the first bearing 151 and the outer ring of the first bearing 151, and the outer ring of the first bearing 151 cannot synchronously rotate along with the rotating shaft 15, so that the second shaft sleeve 162 cannot synchronously rotate.

With continued reference to fig. 4, the rotating shaft 15 is axially provided with a hollow structure, and the pressing device 10 further includes a second nut 17 and a second screw 18, where the second screw 18 is inserted into the rotating shaft 15 through the second nut 17 and the roller shaft 14 in order, for locking the roller shaft 14 with the rotating shaft 15. Specifically, a second screw 18 is inserted through the roller shaft 14 in the hollow structure of the rotating shaft 15, and a second nut 17 is used to lock the roller shaft 14 with the rotating shaft 15.

With continued reference to fig. 4, the compressing device 10 further includes an oil seal 19, where the oil seal 19 is located at the opening and sleeved on the outer side of the rotating shaft 15, and an outer surface of the oil seal 19 contacts an inner surface of the eccentric sleeve 12; the pressing device 10 further comprises a clamp spring 20 for a hole, which is arranged between the oil seal 19 and the second bearing 152, wherein the first bearing 151 is positioned on one side of the second bearing 152 away from the oil seal 19; wherein, the periphery of the rotating shaft 15 is further sleeved with a third shaft sleeve 163, and the periphery of the third shaft sleeve 163 is contacted with the oil seal 19. Specifically, the oil seal 19 is located at the open portion of the second end of the roller bushing 11, sleeved on the outer side of the rotating shaft 15, and the outer surface of the oil seal 19 is in contact with the inner surface of the eccentric sleeve 12, and the oil seal 19 plays a role in sealing and dust prevention. The pressing device 10 further includes a hole clamp spring 20, and the hole clamp spring 20 is disposed between the oil seal 19 and the second bearing 152, for fixing the second bearing 152. In addition, the outer periphery of the rotary shaft 15 is further sleeved with a third shaft sleeve 163, and the outer periphery of the third shaft sleeve 163 is in contact with the oil seal 19.

In the present embodiment, referring to fig. 4 and 6, the surface of the eccentric sleeve 12 facing the first screw 13 is provided with a positioning pin 21; the roller bushing 11 is provided with an arc-shaped groove 22 that receives the positioning pin 21, the positioning pin 21 sliding within the range defined by the arc-shaped groove 22. Specifically, the upper surface of the eccentric sleeve 12, facing in the direction of the first screw 13, is provided with a raised locating pin 21, and the roller bushing 11 is provided with an arc-shaped groove 22 receiving the locating pin 21, as shown in fig. 2, the locating pin 21 sliding within the range defined by the arc-shaped groove 22.

Specifically, since the positioning pin 21 can only move in the arc-shaped groove 22, when the positioning pin 21 moves to the end of the arc-shaped groove 22, it cannot move any further, and thus the eccentric sleeve 12 cannot move relative to the roller bushing 11, that is, the positioning pin 21 and the arc-shaped groove 22 are disposed, so that the eccentric sleeve 12 can rotate relative to the roller bushing 11 only within a predetermined angle range.

Of course, in other embodiments, the positioning pin 21 and the arc-shaped groove 22 may not be provided, and the eccentric sleeve 12 may rotate 360 degrees relative to the roller bushing 11.

With continued reference to fig. 4 and 6, the outer surface of the roller bushing 11 is provided with mounting holes; the pressing device 10 further comprises a side pushing gear 23 sleeved on the periphery of the first screw rod 13, and the first screw rod 13 is fixedly connected with the eccentric sleeve 12 after passing through the side pushing gear 23, wherein at least part of meshing teeth of the side pushing gear 23 are exposed in the mounting hole; the compressing device 10 further comprises an adjusting screw 24, one end of the adjusting screw is positioned in the mounting hole and meshed with the side pushing gear 23, and the other end of the adjusting screw is exposed outside the roller bushing 11; when the first screw 13 is not locked with the roller bushing 11, if the adjusting screw 24 is rotated, the adjusting screw 24 drives the side pushing gear 23 to rotate, and the side pushing gear 23 drives the first screw 13 to rotate.

Specifically, as shown in fig. 4, the first screw 13 passes through the locking hole of the roller bushing 11 and is eccentrically connected with the eccentric sleeve 12, and also passes through the side pushing gear 23, that is, the side pushing gear 23 is sleeved on the periphery of the first screw 13, and a part of the meshing teeth of the side pushing gear 23 is exposed in the mounting hole of the outer surface of the roller bushing 11. As shown in fig. 6, a part of the adjusting screw 24 is positioned in the mounting hole to mesh with the side push gear 23, and the other end is exposed outside the roller bushing 11. When the adjusting screw 24 is rotated by an external force (e.g., manually), the side-pushing gear 23 engaged with the adjusting screw 24 is rotated, and the first screw 13 penetrating the side-pushing gear 23 is rotated.

In this embodiment, the pressing device 10 further includes a fourth shaft sleeve 164, which is located in the mounting hole and is sleeved on the outer side of the adjusting screw 24 where no engaging teeth are provided; a locking screw 25 locks the fourth bushing 164 with the roller bushing 11. Specifically, the side of the adjusting screw 24 with the meshing teeth is meshed with the side pushing gear 23, the periphery of the side of the adjusting screw 24 without the meshing teeth is sleeved with the fourth shaft sleeve 164, and the fourth shaft sleeve 164 can play a role in lubrication and support in the rotating process of the adjusting screw 24, so that friction between the adjusting screw 24 and the roller bushing 11 is reduced, and abrasion is reduced. The compression device 10 further includes a locking screw 25, the locking screw 25 locking the fourth bushing 164 with the roller bushing 11. Referring to fig. 2 and 6, the pressing device 10 further includes an adjusting cap 26, where the adjusting cap 26 is disposed on a side of the adjusting screw 24 exposed outside the roller bushing 11, and the screw 24 is driven to rotate by rotating the adjusting cap 26, so as to drive the side pushing gear 23 to rotate.

Referring to fig. 5, in the present embodiment, the outer surface of the roller shaft 14 is provided with an annular groove 1011, and the annular groove 1011 is for receiving an annular protrusion 141 provided on the saw tooth 101. The annular groove 1011 is arranged on the outer surface of the roller shaft 14 and is matched with the annular protrusion 141 arranged on the saw tooth 101, so that the saw tooth 101 can be well pressed, and in the rotating process of the saw tooth 101, the friction of the annular groove 1011 can be reduced, and the service life of the roller shaft 14 can be prolonged.

In other embodiments, the surface of the roller shaft 14 may be a smooth surface.

In summary, the pressing device 10 is adopted in the present utility model, and includes a roller bushing 11, an eccentric sleeve 12, and a roller shaft 14, on one hand, an external force is utilized to rotate an adjusting screw 24 to drive a meshed side pushing gear 23 to rotate, the side pushing gear 23 drives a first screw 13 penetrating through the outer side of the side pushing gear 23 to rotate, and further the eccentric sleeve 12 fixedly connected with the first screw 13 moves, and the eccentric sleeve 12 drives the roller shaft 14 to press the saw teeth 101, so that the saw teeth 101 are limited in the main housing 501; on the other hand, when the saw teeth 101 rotate, the roller shaft 14 rotates, and the roller shaft 14 rotates along with the rotation process of the saw teeth 101, so that friction caused by rotation of the saw teeth 101 can be reduced, and the service life of the pressing device 10 can be prolonged.

The foregoing description is only of embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the present utility model.

Claims (10)

1. A compression device for compressing serrations, the compression device comprising:

the roller lining is internally provided with a first accommodating space, the first end of the roller lining is provided with a locking hole communicated with the first accommodating space, and the second end of the roller lining is provided with an opening part;

the eccentric sleeve is arranged in the first accommodating space;

the first end of the first screw rod is eccentrically connected with the eccentric sleeve from the locking hole, and the second end of the first screw rod is exposed out of the roller bushing;

the roller shaft is sleeved on the periphery of the second end of the roller bushing and is connected with the eccentric sleeve through the opening part;

the first nut is sleeved on the periphery of the second end of the first screw rod and used for locking the first screw rod and the roller bushing;

when the first nut does not lock the first screw rod and the roller bushing, the first screw rod rotates under the action of external force, so that the eccentric sleeve is driven to eccentrically rotate, and the roller shaft is driven to rotate.

2. The compressing device as claimed in claim 1, wherein a second accommodating space is provided inside the eccentric sleeve; the compaction device further includes:

the rotating mechanism is arranged in the second accommodating space, and the eccentric sleeve is movably connected with the roller shaft through the rotating mechanism;

when the first screw rod rotates under the action of external force, the eccentric sleeve drives the roller shaft to rotate through the rotating mechanism, and when the first screw rod is locked with the roller bushing, the roller shaft rotates along with the rotation of the saw teeth.

3. The compression device of claim 2, wherein the rotation mechanism comprises:

a rotating shaft inserted in the second accommodating space through the roller shaft, wherein the rotating shaft is coaxially arranged with the roller shaft;

the first bearing and the second bearing are sleeved on the periphery of the rotating shaft, and the outer rings of the first bearing and the second bearing are fixedly connected with the eccentric sleeve;

the first shaft sleeve is sleeved on the periphery of the rotating shaft and is positioned between the first bearing and the second bearing, the first bearing and the inner ring of the first bearing are fixedly connected, the second shaft sleeve is sleeved on the outer side of the first shaft sleeve, and the first bearing and the outer ring of the first bearing are fixedly connected.

4. A compression device according to claim 3, wherein the shaft is axially arranged in a hollow structure, the compression device further comprising:

a second nut;

the second screw rod sequentially penetrates through the second nut and the roller shaft to be inserted into the rotating shaft and used for locking the roller shaft and the rotating shaft.

5. A compression device according to claim 3, further comprising:

the oil seal is positioned at the opening part and sleeved on the outer side of the rotating shaft, wherein the outer surface of the oil seal is in contact with the inner surface of the eccentric sleeve;

the clamping spring for the hole is arranged between the oil seal and the second bearing, wherein the first bearing is positioned at one side of the second bearing, which is away from the oil seal;

the periphery of the rotating shaft is further sleeved with a third shaft sleeve, and the periphery of the third shaft sleeve is in contact with the oil seal.

6. The compression device of claim 1, wherein a surface of the eccentric sleeve facing the first screw is convexly provided with a locating pin;

the roller bushing is provided with an arcuate groove that receives the locating pin, which slides within the range defined by the arcuate groove.

7. The compaction device of claim 1, wherein an outer surface of the roller bushing is provided with a mounting hole;

the compaction device further includes:

the side pushing gear is sleeved on the periphery of the first screw rod, and the first screw rod is fixedly connected with the eccentric sleeve after penetrating through the side pushing gear, wherein at least part of meshing teeth of the side pushing gear are exposed in the mounting hole;

one end of the adjusting screw rod is positioned in the mounting hole and meshed with the side pushing gear, and the other end of the adjusting screw rod is exposed out of the roller bushing;

when the first screw rod and the roller bushing are not locked, if the adjusting screw rod is rotated, the adjusting screw rod drives the side pushing gear to rotate, and then the side pushing gear drives the first screw rod to rotate.

8. The compression device of claim 7, further comprising:

the fourth shaft sleeve is positioned in the mounting hole and sleeved on the outer side of the adjusting screw, which is not provided with the meshing teeth;

and the locking screw locks the fourth shaft sleeve and the roller bushing.

9. A compacting apparatus as claimed in claim 1, characterised in that the outer surface of the roller shaft is provided with an annular groove for receiving an annular projection provided on the serration.

10. A hydraulic trepan comprising serrations and a hold-down device as claimed in any one of claims 1 to 9.