Screw rod axial clearance adjusting mechanism

Abstract

The utility model relates to the technical field of lead screws, in particular to a lead screw axial clearance adjusting mechanism which comprises a first rack and a second rack which are oppositely arranged. A circular first containing groove is formed in the middle of the first rack, and a first bearing is arranged in the first containing groove; a circular second containing groove is formed in the middle of the second rack, a threaded groove is formed along the inner wall of the second containing groove, a sleeve with an opening in one end is arranged in the second containing groove, the opening of the sleeve faces the first rack, a threaded protrusion corresponding to the threaded groove is arranged along the outer wall of the sleeve, and a second bearing is arranged in the sleeve. The sleeve is in threaded connection with the second containing groove, so that the sleeve can push the second bearing to linearly move in the axial direction of the lead screw, axial position adjustment and axial positioning of the lead screw are achieved, the axial position of the lead screw is adjusted through the sleeve, and conventional screw adjustment is omitted.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of screw rod, specifically is a screw rod axial gap adjusting mechanism. BACKGROUND

[0002] Now, automation equipment has been widely applied, and screw rod transmission is a commonly used transmission mode in automation equipment, and the screw rod is not allowed to move axially during use; the traditional installation mode is that: the screw rod is respectively provided with a bearing at both ends, a locking nut is arranged outside the left bearing, the left bearing is locked with the screw rod, and the axial position of the screw rod is limited by only the left bearing, and the right bearing does not have axial limiting effect and only does radial support.

[0003] But as the locking nut needs to make frequent forward and reverse rotation with the screw rod, the locking nut is prone to loosening in the process, causing axial positioning failure and equipment failure; meanwhile, the locking nut also occupies a certain axial space, which is not conducive to the miniaturization design of the equipment.

[0004] Therefore, a screw rod axial gap adjusting mechanism is proposed to solve the problems in the prior art. CONTENT OF THE UTILITY MODEL

[0005] In view of the defects in the prior art, the utility model provides a screw rod axial gap adjusting mechanism, which can solve the problems that the locking nut for limiting the axial position of the screw rod is prone to loosening after long-term use and occupies too much space.

[0006] To achieve the above object, the utility model provides the following technical scheme: a screw rod axial gap adjusting mechanism, comprising a first rack and a second rack, the first rack and the second rack are oppositely arranged;

[0007] A circular first accommodating groove is formed in the middle of the first rack, and a first bearing is arranged in the first accommodating groove;

[0008] A circular second accommodating groove is formed in the middle of the second rack, and a threaded groove is formed along the inner wall of the second accommodating groove, a sleeve with one end open is arranged in the second accommodating groove, the opening of the sleeve is arranged towards the first rack, a threaded protrusion corresponding to the threaded groove is arranged along the outer wall of the sleeve, and a second bearing is arranged in the sleeve.

[0009] Preferably, a strip-shaped through groove is formed on the end face of the sleeve.

[0010] Preferably, a slot is formed in the top of the second rack, the slot penetrates into the second accommodating groove, a screw hole is formed on one side of the slot, a first through hole is formed on the other side of the slot, a bolt is arranged in the first through hole, and the end of the bolt corresponds to the screw hole.

[0011] Preferably, a second through hole is formed on the outer wall of the second rack, the second through hole is coaxially corresponding to the first through hole, and the second through hole corresponds to the screw head of the bolt.

[0012] Preferably, the outer wall of the first bearing is attached to the inner wall of the first accommodating groove.

[0013] Preferably, the outer wall of the second bearing is attached to the inner wall of the sleeve.

[0014] Preferably, a mounting seat is arranged on the outer wall of the first rack and the outer wall of the second rack.

[0015] Compared with the prior art, the utility model provides a screw rod axial gap adjusting mechanism, has the following beneficial effects:

[0016] 1, the utility model discloses a sleeve and the threaded connection of second accommodating groove, let sleeve can push second bearing along the axial direction of screw rod and move linearly, thereby realize the axial position adjustment and axial positioning of screw rod.

[0017] 2, the utility model discloses the sleeve in second accommodating groove to the axial position adjustment of screw rod, has saved the conventional screw adjustment, has saved the space occupation of rack, is favorable to the miniaturization of equipment, lightweight design.

[0018] 3, the utility model discloses the tightening of second accommodating groove by bolt, can hold the sleeve in place, effectively avoid the problem that screw rod rotation leads to sleeve to appear accidental sliding in second accommodating groove. DRAWINGS

[0019] Figure 1 It is the structure diagram of the utility model Figure 1 ;

[0020] Figure 2 It is the structure diagram of the utility model Figure 2 ;

[0021] Figure 3 It is the structure diagram of the second rack of the utility model;

[0022] Figure 4 It is the second rack section view of the utility model.

[0023] In the drawing: 1, first rack;2, first accommodating groove;3, first bearing;4, second rack;5, second accommodating groove;6, second bearing;7, threaded groove;8, sleeve;9, threaded protrusion;10, through groove;11, slot;12, second through hole;13, bolt;14, screw hole;15, first through hole. CONCRETE IMPLEMENTATION

[0024] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0025] Embodiment:

[0026] Please refer to Figure 1 - Figure 4 The axial gap adjusting mechanism of the screw rod in the embodiment comprises a first rack 1 and a second rack 4, and the first rack 1 and the second rack 4 are oppositely arranged. In the actual use process, the mounting seat is a bracket with a hole on the surface, and a screw can be taken to allow the first rack 1 and the second rack 4 to be installed and fixed on the equipment.

[0027] A circular first accommodating groove 2 is formed in the middle of the first rack 1, and a first bearing 3 is arranged in the first accommodating groove 2. The outer wall of the first bearing 3 is attached to the inner wall of the first accommodating groove 2.

[0028] It should be noted that, in use, one end of the screw rod (such as the position indicated by arrow A in Figure 1 ) is placed in the first bearing 3, and a driving shaft (such as the position indicated by arrow B in Figure 1 ) for connecting with the motor is connected to the end of the screw rod.

[0029] As shown in Figure 1 and Figure 3 , a circular second accommodating groove 5 is formed in the middle of the second rack 4, and a threaded groove 7 is formed along the inner wall of the second accommodating groove 5. A sleeve 8 with an open end is arranged in the second accommodating groove 5, and the open end of the sleeve 8 is arranged towards the first rack 1. A threaded protrusion 9 corresponding to the threaded groove 7 is arranged along the outer wall of the sleeve 8, and a second bearing 6 is arranged in the sleeve 8. The sleeve 8 can rotate in the second accommodating groove 5 and move linearly along the axis direction of the second accommodating groove 5 under the threaded connection.

[0030] Specifically, one end of the screw rod away from the first bearing 3 is placed in the second bearing 6. In the use process, if the axial position of the screw rod deviates, the sleeve 8 can be rotated to adjust the position of the second bearing 6. In this way, the axial position of the screw rod can be limited by the two bearings, and the axial position adjustment and axial positioning of the screw rod are achieved. Moreover, the conventional lock nut design is omitted, and there is no additional outward protruding part on the rack, which saves space and is conducive to the miniaturization and lightweight design of the equipment.

[0031] In order to improve the convenience of adjustment, a strip-shaped through slot 10 is formed on the end face of the sleeve 8, and an operator can place a screwdriver or other tool in the through slot 10 and rotate the sleeve 8.

[0032] Further, the outer wall of the second bearing 6 is attached to the inner wall of the sleeve 8, and cooperates with the attachment of the first bearing 3 in the first accommodating groove 2 to radially support and position the lead screw.

[0033] It should be noted that, as shown in Figure 3 and Figure 4 , a slot 11 is formed on the top of the second rack 4, the slot 11 penetrates the second accommodating groove 5, a screw hole 14 is formed on one side of the slot 11, a first through hole 15 is formed on the other side of the slot 11, a bolt 13 is arranged in the first through hole 15, the end of the bolt 13 corresponds to the screw hole 14, after adjusting the axial position of the lead screw, the bolt 13 can be screwed to make the slot 11 relatively close, so as to clamp the sleeve 8 arranged in the second accommodating groove 5, thereby fastening the sleeve 8 in the second accommodating groove 5, preventing the sleeve 8 from rotating unexpectedly during use of the lead screw, and further causing the axial position of the lead screw to deviate.

[0034] Further, in order to reduce the space occupied after the bolt 13 is arranged, a second through hole 12 is formed on the outer wall of the second rack 4, the second through hole 12 corresponds to the first through hole 15 coaxially, and the second through hole 12 corresponds to the head of the bolt 13, so as to accommodate the head of the bolt 13, preventing the head of the bolt 13 from extending outward and increasing the space occupied by the second rack 4.

[0035] The mounting method, connection method or arrangement method disclosed in the embodiment are all common mechanical connection methods, and can be implemented as long as the beneficial effects can be achieved, so the specific structural components and working principles will not be described in detail.

[0036] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A lead screw axial gap adjustment mechanism characterized by: It comprises a first frame (1) and a second frame (4), which are oppositely arranged; A first accommodating groove (2) in a circular shape is formed in the middle of the first frame (1), and a first bearing (3) is arranged in the first accommodating groove (2); A second accommodating groove (5) in a circular shape is formed in the middle of the second frame (4), and a threaded groove (7) is formed along the inner wall of the second accommodating groove (5), a sleeve (8) with one end being open is arranged in the second accommodating groove (5), the opening of the sleeve (8) is arranged towards the first frame (1), and a threaded convex (9) corresponding to the threaded groove (7) is arranged along the outer wall of the sleeve (8), and a second bearing (6) is arranged in the sleeve (8).

2. The mechanism according to claim 1, wherein: A strip-shaped through groove (10) is formed on the end face of the sleeve (8).

3. The mechanism according to claim 1, wherein: A slot (11) is formed in the top of the second frame (4), the slot (11) penetrates into the second accommodating groove (5), a screw hole (14) is formed on one side of the slot (11), a first through hole (15) is formed on the other side of the slot (11), a bolt (13) is arranged in the first through hole (15), and the end of the bolt (13) corresponds to the screw hole (14).

4. A mechanism for adjusting the axial play of a lead screw according to claim 3, characterized in that: A second through hole (12) is formed on the outer wall of the second frame (4), the second through hole (12) corresponds to the first through hole (15) coaxially, and the second through hole (12) corresponds to the screw head of the bolt (13).

5. The mechanism of claim 1, wherein: The outer wall of the first bearing (3) is attached to the inner wall of the first accommodating groove (2).

6. The mechanism of claim 1, wherein: The outer wall of the second bearing (6) is attached to the inner wall of the sleeve (8).

7. The mechanism of claim 1, wherein: Mounting seats are arranged on the outer wall of the first frame (1) and the outer wall of the second frame (4).

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