Special hammer for withdrawing slot wedge

Abstract

A special hammer for withdrawing a slot wedge comprises a hammer body, a wedge-shaped protrusion is arranged at the upper end of the hammer body, a handle is fixedly connected to the hammer body, the top of the hammer body is fixedly connected with a hammer head through a dowel bar, a plurality of positioning sleeves are arranged on the hammer body, and a section of wedge-shaped insertion block extends outwards from one side of each positioning sleeve. The utility model is used for solving the problem that the slot wedge is easy to split when the slot wedge ventilation opening is singly knocked in the prior art.

Description

Technical Field

[0001] The utility model relates to a special hammer for withdrawing a groove wedge. Background Art

[0002] When the stator winding is off the line, wedge driving and wedge removal is a time-consuming, labor-intensive and repetitive process. Currently, there are many types of tools used for wedge driving / wedge removal, most of which are too simple and difficult to operate, and most of them do not consider that there is no point of force when wedge removal. The traditional method of hitting the wedge ventilation position alone is easy to cause the wedge to split. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a special hammer for withdrawing a slot wedge, which is used to solve the problem that the slot wedge is easily split due to the existing single knocking of the slot wedge ventilation opening.

[0004] In order to solve the above problems, the technical solution of the utility model is:

[0005] A special hammer for withdrawing groove wedges comprises a hammer body, a wedge-shaped protrusion is arranged on the upper end of the hammer body, a handle is fixedly connected to the hammer body, the top of the hammer body is fixedly connected to the hammer head through a force transmission rod, a plurality of positioning sleeves are arranged on the hammer body, and a wedge-shaped insertion block is extended outward from one side of the positioning sleeve.

[0006] Slide grooves are provided on both sides of the hammer body, and the lower end of the slide groove passes through the hammer body. Two convex ridges are provided on the inner wall of the positioning sleeve, and the convex ridges are assembled in the slide grooves. An ear plate is provided on one side of the positioning sleeve, and a through hole is provided on the ear plate. A screw is threadedly connected to the handle, and the screw passes through the through holes on the ear plate. Locking nuts are assembled on the screws on both sides of the through hole.

[0007] A notch is arranged at a corner of the positioning sleeve away from the screw rod.

[0008] The beneficial effects of the utility model are as follows: a plurality of wedge-shaped insertion blocks are inserted into the slot wedge ventilation groove, the contact surface is expanded, the force points are increased, the positioning sleeves are subjected to force synchronously and evenly, and the slot wedge ventilation opening can be effectively prevented from being split. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The utility model is further described below in conjunction with the accompanying drawings:

[0010] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0011] Figure 2 It is a three-dimensional structural schematic diagram of the utility model.

[0012] In the figure: hammer body 1, slide groove 2, locking nut 3, screw rod 4, ear plate 5, handle 6, force transmission rod 7, hammer head 8, wedge-shaped protrusion 9, positioning sleeve 10, insertion block 11, convex ridge 12, and notch 13. DETAILED DESCRIPTION

[0013] like Figure 1 and 2 As shown, a special hammer for withdrawing groove wedges includes a hammer body 1, a wedge-shaped protrusion 9 is provided on the upper end of the hammer body 1, a handle 6 is fixedly connected to the hammer body 1, the top of the hammer body 1 is fixedly connected to the hammer head 8 through a force transmission rod 7, three positioning sleeves 10 are provided on the hammer body 1, and a wedge-shaped insertion block 11 extends outward from one side of the positioning sleeve 10, and the cross-sectional shape of the ventilation groove of the wedge-shaped insertion block 11 is consistent with or slightly smaller than that of the ventilation groove.

[0014] When in use, the upper wedge-shaped protrusion 9 is placed on the upper end of the installed slot wedge or in the gap between the slot wedge to be withdrawn and the previous slot wedge, and can be embedded tighter and tighter as the striking head is hit with force. At the same time, the insertion block 11 is inserted into the ventilation groove, and then the handle 6 is held and the hammer head 8 is struck to complete the slot wedge driving or slot wedge withdrawal.

[0015] Slide grooves 2 are provided on both sides of the hammer body 1, and the lower end of the slide groove 2 passes through the hammer body 1. Two convex ridges 12 are provided on the inner wall of the positioning sleeve 10, and the convex ridges 12 are assembled in the slide groove 2. An ear plate 5 is provided on one side of the positioning sleeve 10, and a through hole is provided on the ear plate 5. A screw rod 4 is threadedly connected to the handle 6, and the screw rod 4 passes through the through holes on the ear plate 5. Locking nuts 3 are assembled on the screw rod 4 on both sides of the through hole.

[0016] This structure can conveniently adjust the upper and lower heights of the wedge-shaped insert blocks 11, so that each insert block 11 exerts force on the ventilation groove, compensates for errors in the processing of the ventilation groove, and allows each insert block 11 to be evenly stressed.

[0017] In addition, the structure that the lower end of the slide groove 2 passes through the hammer body 1 can facilitate the positioning sleeve 10 to be fitted onto the hammer body 1 .

[0018] A notch 13 is provided at a corner of the positioning sleeve 10 away from the screw rod 4. The notch 13 enables each insert block 11 to be fully inserted into the ventilation groove, so that the hammer body 1 is attached to the winding surface.

[0019] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A special hammer for withdrawing a groove wedge, characterized in that: The hammer body (1) comprises a hammer body (1), the upper end of which is provided with a wedge-shaped protrusion (9), a handle (6) fixedly connected to the hammer body (1), the top of the hammer body (1) being fixedly connected to a hammer head (8) via a force transmission rod (7), a plurality of positioning sleeves (10) being provided on the hammer body (1), and a wedge-shaped insertion block (11) extending outwardly from one side of the positioning sleeve (10).

2. A special hammer for withdrawing a groove wedge according to claim 1, characterized in that: Slide grooves (2) are provided on both sides of the hammer body (1), and the lower ends of the slide grooves (2) penetrate the hammer body (1). Two ridges (12) are provided on the inner wall of the positioning sleeve (10), and the ridges (12) are assembled in the slide grooves (2). An ear plate (5) is provided on one side of the positioning sleeve (10), and a through hole is provided on the ear plate (5). A screw rod (4) is threadedly connected to the handle (6), and the screw rod (4) passes through each through hole on the ear plate (5). Lock nuts (3) are assembled on the screw rod (4) on both sides of the through hole.

3. A special hammer for withdrawing a groove wedge according to claim 2, characterized in that: A notch (13) is provided at a corner of the positioning sleeve (10) away from the screw rod (4).

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